Patent Grant
9031462
This application is based on and claims priority under 35 USC 119 from Japanese Patent Application No. 2012-247429 filed Nov. 9, 2012.
(i) Technical Field
The present invention relates to an apparatus with an opening and closing door.
(ii) Related Art
In the related art, in apparatuses, such as an image forming apparatus, for example, the technique of reducing sound leakage during an operation is already suggested.
According to an aspect of the invention, there is provided an apparatus including a device that includes a driving source, an opening and closing door that is opened and closed by rotational operation about a rotating shaft with respect to a body of the apparatus, and an elastic part that is provided at the body of the apparatus, that is elastically deformed by contact with a first portion of apart of the opening and closing door on the side of the rotating shaft and blocks a gap between the first portion and the body of the apparatus when the opening and closing door is closed, and that is elastically deformed by contact with a second portion of the opening and closing door that is different from the first portion when the opening and closing door is opened.
Exemplary embodiments of the present invention will be described in detail based on the following figures, wherein:
Exemplary embodiments of the invention will be described below with reference to the drawings.
Configuration of Overall Image Forming Apparatus
The image forming apparatus 1 related to Exemplary Embodiment 1 is constituted as, for example, a color printer. The image forming apparatus 1 includes plural image forming devices 10 as image forming units that form toner images developed with toners that constitute developers 4, an intermediate transfer device 20 that holds the toner images formed by the respective image forming devices 10, respectively, and finally transports the toner images to a secondary transfer position where the toner images are secondarily transferred to recording sheet 5 as an example of a recording medium, a sheet feeder 50 that accommodates and transports the required recording sheet 5 to be supplied to the secondary transfer position of the intermediate transfer device 20, a fixing device 40 that fixes the toner images on the recording sheet 5 secondarily transferred by the intermediate transfer device 20, and motors as driving sources that drive these.
The image forming apparatus 1 may be constituted as for example, a color copying machine in a case where an image input device (not shown) that inputs an original image to be formed on the recording sheet 5 is added and provided. 1a in the drawing represents a body of the image forming apparatus, and the body 1a is formed by a supporting structure member, an outer cover, or the like.
The image forming devices 10 are constituted by four image forming devices 10Y, 10M, 10C, and 10K that exclusively form toner images in four colors of yellow (Y), magenta (M), cyan (C), and black (K), respectively. The four image forming devices 10 (Y, M, C, and K) are arranged so as to line up in a row in an internal space of the body 1a.
Each image forming device 10 (Y, M, C, or K), as shown in
The photoconductor drum 11 is provided by forming an image holding surface having a photoconductive layer (photosensitive layer) made of a photosensitive material on the peripheral surface of a cylindrical or columnar base material that is subjected to grounding treatment. The photoconductor drum 11 is supported so as to have power transmitted thereto from a rotation drive unit (not shown) and to rotate in a direction shown by arrow A.
The charging device 12 is constituted by a contact type charging device, such as a charging roll, which is arranged in contact with the photoconductor drum 11. The charging device 12 supplies a charging voltage to the charging roll. In a case where the developing device 14 is one that performs reversal development, as the charging voltage, the same polarity of voltage or current as the charging polarity of a toner supplied from the developing device 14 is supplied.
The exposure device 13 includes an LED array in which LED elements are arrayed along an axial direction of the photoconductor drum 11, and is one that irradiates the peripheral surface of the photoconductor drum 11 after being charged with a light beam configured according to information on an image input to the image forming apparatus 1, and forms an electrostatic latent image. Image information is input to a controller C of the image forming apparatus 1 from an external image information transmission device PC. This image information is converted into image information of yellow (Y), magenta (M), cyan (C), and black (K) and is transmitted to the exposure device 13 via a drive unit DL when a latent image is formed.
All the developing devices 14 (Y, M, C, and K), as shown in
The primary transfer device 15 is a contact type transfer device including a primary transfer roll that rotates in contact with the peripheral surface of the photoconductor drum 11 and has a primary transfer voltage supplied thereto. As the primary transfer voltage, a direct-current voltage that shows polarity reverse to the charging polarity of a toner is supplied from the power unit E.
The drum cleaning device 16, as shown in
The intermediate transfer device 20, as shown in
As the intermediate transfer belt 21, for example, an endless belt made of a material in which a resistance adjusting agent, such as carbon black, is dispersed in a synthetic resin, such as polyimide resin or polyamide resin, is used. Additionally, the belt supporting roll 22 is constituted as a driving roll, the belt supporting rolls 23 and 26 are constituted as driven rolls that hold the traveling position or the like of the intermediate transfer belt 21, the belt supporting roll 25 is constituted as a tensioning roll, and the belt supporting roll 24 is constituted as a secondary transfer back-up roll.
The secondary transfer device 30, as shown in
The fixing device 40 is configured by arranging, inside a housing 41 formed with an introduction port and an ejection port for the recording sheet 5, a roll-shaped heating rotary member 42 heated by a heating unit so as to rotate in a direction shown by an arrow and so that the surface temperature thereof is maintained at a predetermined temperature, a roll-shaped pressurizing rotary member 43 that rotates to follow the heating rotary member 42 in contact with the heating rotary member with a predetermined pressure substantially along the axial direction of the heating rotary member, and the like. In the fixing device 40, a contact portion where the heating rotary member 42 and the pressurizing rotary member 43 come into contact with each other becomes a fixing processing part that performs a required fixing process (heating and pressurization).
The sheet feeder 50 is arranged so as to be present at a position below the image forming devices 10. The sheet feeder 50 is mainly constituted by single (or plural) sheet accommodation members 511 to 514 that accommodate the recording sheet 5 of desired sizes, types, or the like, in a stacked state and a delivery device 52 that delivers the recording sheet 5 sheet by sheet from the sheet accommodation members 511 to 514. The sheet accommodation member 51 is attached, for example, so as to be able to be pulled out to the front surface (side surface that a user faces at the time of operation) side of the body 1a.
A sheet feeding and transporting device 59 as a transporting unit that is constituted by plural sheet transporting roll pairs 54 to 58 and a transporting and guiding member that transport the recording sheet 5, which is separated and delivered sheet by sheet by a sending-out roll and a separation pad as the delivery device 52 that delivers from the sheet feeder 50, to the secondary transfer position, is provided between the sheet feeder 50 and the secondary transfer device 30. The sheet transporting roll pair 58 arranged at a position immediately before the secondary transfer position in the sheet feeding and transporting device 59 is constituted as, for example, rolls (registration rolls) that adjust the transporting timing of the recording sheet 5 to adjust the position of the recording sheet 5 that reaches the secondary transfer position consequently.
A sheet ejection path 61 along which the recording sheet 5 is transported to a sheet ejection tray 60, and an upper connection path 62 as a transporting path along which the recording sheet 5 that is ejected in a reversed manner or with its image recording surface turned upward is transported are arranged on the upper side that is the downstream side in the transporting direction of the fixing device 40. A first gate 63 that switches a transporting path according to a transporting destination of the recording sheet 5 is arranged at a connecting portion between the sheet ejection path 61 and the upper connection path 62. Accordingly, in a case where a sheet is ejected to the ejection tray 60, the recording sheet 5 subjected to the fixing process is transported along the sheet ejection path 61, and is ejected to the sheet ejection tray 60 by a sheet ejection roll 64.
An optional ejection unit 65 as an additional medium ejection device is supported above the fixing device 40, and the optional ejection unit 65 has a face-down tray 66 that is arranged above the sheet ejection tray 60 and has the recording sheet stacked thereon with its image recording surface turned downward, similar to the sheet ejection tray 60, and a face-up tray 67 that has the recording sheets stacked thereon with its image recording surface turned upward. A reversal/ejection common path 68 as a transporting path that is connected to the upper connection path 62, a face-down ejection path 69 that is connected to the reversal/ejection common path 68 and sends the recording sheet 5 to the face-down tray 66, and a face-up transporting path 70 that is connected to the reversal/ejection common path 68 and sends the recording sheet 5 to the face-up tray 67 are provided inside the optional ejection unit 65. A second gate 71 that switches a transporting path according to a transporting destination of the recording sheet 5 is arranged at a connecting portion between the face-down ejection path 69 and the face-up transporting path 70. Accordingly, in a case where a sheet is ejected to the face-down tray 66, the recording sheet 5 subjected to the fixing processing is transported along the face-down ejection path 69, and is ejected to the face-down tray 66 by a sheet ejection roll 69a. Accordingly, in a case where a sheet is ejected to the face-up tray 67, the recording sheet 5 subjected to the fixing processing is transported along the face-up ejection path 70, and is ejected to the face-up tray 67 by a sheet ejection roll 70a.
Additionally, a reversal unit 72 as an additional unit is installed at a left portion of the image forming apparatus body 1a. A reversal transporting path 73 is formed along a vertical direction in the reversal unit 72, and reversal rolls 74, 75, and 76 that transport the recording sheet 5 downward are arranged at the reversal transporting path 73. An upper end portion of the reversal transporting path 73 is connected to an upper end portion of the upper connection path 62 via an upper transporting path 77, and a transporting roll 78 is arranged at a connection position between the upper transporting path 77 and the upper connection path 62. Additionally, a third gate 79 that switches a transporting path according to a transporting destination of the recording sheet 5 transported downward from the reversal/ejection common path 68 to the transporting roll 78 is arranged at a connecting portion between the upper transporting path 77 and the upper connection path 62. Additionally, a lower end portion of the reversal transporting path 73 is connected to the registration roll 58 via a lower transporting path 80.
The reversal unit 72 transports the recording sheet 5, which has an image formed on one surface thereof, to the face-down ejection path 69, and when the recording sheet is ejected to the face-down tray 66 by the ejection roll 69a, the reversal unit reverses the ejection roll 69a in a state where the ejection roll 69a pinches the rear end of the recording sheet 5, introduces the recording sheet 5 via the face-down ejection path 69 and the reversal/ejection common path 68 to the upper transporting path 77 by changing the transporting direction by the transporting roll 78 by the switching of the third gate 79, and transports the recording sheet to the registration roll 58 in a state where the back and front of the recording sheet is reversed via the reversal transporting path 73 and the lower transporting path 80.
Moreover, a manual sheet feeder 90 is mounted outside a lower end portion of the reversal unit 72 at the left portion of the image forming apparatus body 1a. The recording sheet 5 installed in the manual sheet feeder 90 is fed by a manual feed roll 91, and is transported to the registration roll 58 via a manual transporting path 92.
In addition, reference numerals 84Y, 84M, 84C, and 84K in
Operation of Overall and Main Parts of Image Forming Apparatus
A basic image forming operation using the image forming apparatus 1 will be described below.
Here, an image forming operation when a full color image is configured by combining toner images in four colors (Y, M, C, and K) using the four image forming devices 10 (Y, M, C, and K) will be representatively described.
If the image forming apparatus 1 receives command information on a request for an image forming operation (printing), the four image forming devices 10 (Y, M, C, and K), the intermediate transfer device 20, the secondary transfer device 30, the fixing device 40, and the like start.
Then, in the image forming devices 10 (Y, M, C, and K), the respective photoconductor drums 11 first rotate in the direction shown by arrow A, and the charging devices 12 charge the surfaces of the respective photoconductor drums 11 with required polarity (negative polarity in Exemplary Embodiment 1) and potential, respectively. Subsequently, the exposure devices 13 irradiate the surfaces of the photoconductor drums 11 after the charging with light that is emitted on the basis of signals of an image obtained by converting information on the image input to the image forming apparatus 1 into respective color components (Y, M, C, and K), and form electrostatic latent images of the respective color components configured with a required potential difference on the surfaces of the photoconductor drums.
Subsequently, the respective developing devices 14 (Y, M, C, and K) supply corresponding toners in colors (Y, M, C, and K) charged with a required polarity (negative polarity) to the electrostatic latent images of the respective color components formed on the photoconductor drums 11 from the developing rolls 141, respectively, and cause the toners to adhere to the photoconductor drums electrostatically, thereby performing development. The electrostatic latent images of the respective color components formed on the respective photoconductor drums 11 are visualized as toner images in four colors (Y, M, C, and K) developed with corresponding color toners, respectively, by this development.
Subsequently, if the toner images in the respective colors formed on the photoconductor drums 11 of the respective image forming devices 10 (Y, M, C, and K) are transported to the primary transfer positions, the primary transfer devices 15 primarily transfer the toner images in the respective colors to the intermediate transfer belt 21 that rotates in the direction shown by arrow B of the intermediate transfer device 20 so that the toner images overlap each other in order.
Additionally, in the respective image forming devices 10 that have completed the primary transfer, the drum cleaning devices 16 clean to scrape off the adhering matter on the surfaces of the photoconductor drums 11. Thereby, the respective image forming devices 10 are brought into a state where the next image forming operation is possible.
Subsequently, in the intermediate transfer device 20, the toner images primarily transferred by the rotation of the intermediate transfer belt 21 are held, and are transported to the secondary transfer position. On the other hand, in the sheet feeder 50, a sheet of required recording sheet 5 is delivered to the sheet feeding and transporting device 59 in accordance with an image forming operation. In the sheet feeding and transporting device 59, the sheet transporting roll pair 58 as the registration roll delivers and supplies the recording sheet 5 to the secondary transfer position in accordance with transfer timing.
In the secondary transfer position, the secondary transfer device 30 collectively and secondarily transfers the toner images on the intermediate transfer belt 21 to the recording sheet 5. Additionally, in the intermediate transfer device 20 that has completed the secondary transfer, the belt cleaning device 28 removes and cleans adhering matter, such as toner that remains on the surface of the intermediate transfer belt 21 after the secondary transfer.
Subsequently, the recording sheet 5 to which the toner images are secondarily transferred is peeled off from the intermediate transfer belt 21 and the secondary transfer roll 31, and then transported to the fixing device 40. In the fixing device 40, required fixing processing (heating and pressurization) is performed to cause unfixed toner images to be fixed on the sheet 5 by introducing the recording sheet 5 after the secondary transfer into the contact portion between the rotating heating rotary member 42 and the pressurizing rotary member 43 to pass the recording sheet through the contact portion. Finally, the recording sheet 5 after the fixing is completed is ejected, for example, toward the face-down tray 60 installed in the upper part of the housing 1a, for example, by the sheet ejection roll 64 at the time of an image forming operation of only forming the images to one surface of the recording sheet.
The recording sheet 5 on which a full color image configured by combining the toner images in four colors are formed is output through the above operation.
Configuration of Characterizing Portion of Image Forming Apparatus
Incidentally, in this exemplary embodiment, as shown in
An insertion port 97 into which the tip of the recording sheet 5 installed in the manual feed tray body 95 opens in the above image forming apparatus body 1a, and as shown in
Additionally, as shown in
Additionally, as shown in
The above manual feed tray body 95, as shown in
An end portion 103 of the apparatus body 1a is provided at the body 1a of the image forming apparatus 1 so as to face an end portion 95a of the manual feed tray body 95 on the rotating shaft side via a gap G. An inclined surface 104 that inclines toward the outside of the image forming apparatus body 1a is formed at a position that faces the end portion of the manual feed tray body 95 in the end portion 103 of the apparatus body 1a, and an elastic member 105 as an elastic part with a rectangular cross-section that is made of a soft elastic body, such as urethane foam or silicone rubber, is attached to the inclined surface 104 by means of bonding or the like using double-sided tape 106. The elastic member 105 is provided over the whole width of the manual feed tray body 95 along a direction vertical to the drawing. Although the above inclined surface 104 is formed in an inclined state toward the outside of the image forming apparatus body 1a, the inclined surface is covered with the lower end portion 96a as a first portion of the extension tray 96 that has moved downward in a state where the manual feed tray 94 is stored.
Additionally, an inclined surface 107 is provided at a position corresponding to the inclined surface 104 on the image forming apparatus body 1a side, at the end portion 95a as a second portion that is different from the first portion of the manual feed tray body 95 on the rotating shaft side in the storage state, in the manual feed tray body 95. The inclined surface 107 becomes substantially parallel to the inclined surface 104 on the image forming apparatus body 1a side in a state where the manual feed tray body 95 is opened, and is brought into a state where the elastic member 105 is pressed by the inclined surface 107 and the inclined surface 104.
Operation of Characterizing Portion of Image Forming Apparatus
In the image forming apparatus related to this exemplary embodiment, it is possible to suppress leakage of sound from a gap of an opening and closing member and an occurrence of an impact sound at the time of operation, using a single member, as follows.
That is, in the image forming apparatus 1 related to this exemplary embodiment, as shown in
Therefore, when the manual sheet feeder 90 is not used, the gap G formed between the manual feed tray 90 and the image forming apparatus body 1a is blocked by the elastic member 105 that has elastically deformed, and this prevents or keeps the operating sound of the image forming apparatus 1 from leaking to the outside from the gap G between the manual sheet feeder 90 and the image forming apparatus body 1a.
On the other hand, as shown in
Additionally, in this exemplary embodiment, as shown in
Additionally, in this exemplary embodiment, as shown in
Configuration of Overall Image Forming Apparatus
The image forming apparatus 1 includes the body 1a of which the external shape is a substantially cubical box shape, and the following devices to be driven by a driving source are mainly arranged in the internal space of the body 1a. That is, the plural image forming devices 10 that form toner images configured with toners (powders subjected to coloring or the like) as developers on the basis of input image information, the belt type intermediate transfer device 20 that holds the toner images formed by the respective image forming devices 10, respectively, and finally secondarily transfers the toner images to the recording sheet 5, the sheet feeder 50 that accommodates and transports a required recording sheet 5 to be supplied to the secondary transfer position of the intermediate transfer device 20, the fixing device 40 that causes the recording sheet 5, to which the toner images are secondarily transferred by the intermediate transfer device 20, to pass therethrough, and perform fixing of the toner images, and the like are arranged in the internal space of the body 1a. As for the image forming devices 10, the intermediate transfer device 20, the sheet feeder 50, and the fixing device 40, the sheet feeder 50 is arranged in the lowermost part of the internal space of the body 1a, while the remaining image forming devices 10, intermediate transfer device 20, and fixing device 40 have the positional relationship of being arranged in a stacked state in that order in the internal space of the body 1a located above the sheet feeder 50.
The body 1a is a structure formed using various shapes of supporting members that constitute a framework portion of the image forming apparatus 1, and an outer cover that finally covers the framework portion and the like from the outside. An upper surface portion of the body 1a is formed with an ejection and accommodation section 60 that ejects and accommodates the recording sheet 5 on which an image is formed. The ejection and accommodation section 60 has an inclined surface portion 60a, and a horizontal surface portion 60b that continues from the inclined surface portion 60a and an upper end portion of the inclined surface portion 60a, and the recording sheet 5 after image formation is accommodated so as to be sequentially stacked on the inclined surface portion 60a and the horizontal surface portion 60b. Additionally, a sheet ejection port 64a to which the recording sheet 5 after image formation is ejected is formed in a wall surface portion of the body 1a that rises upward from a lower end portion of the inclined surface portion 60b of the ejection and accommodation section 60.
The image forming devices 10 are constituted by four image forming devices (10Y, 10M, 10C, and 10K) that exclusively form toner images in four colors of yellow (Y), magenta (M), cyan (C), and black (K). The four image forming devices 10 (Y, M, C, and K) include substantially common components as shown below, and are arranged so as to line up in series between the intermediate transfer device 20 and the sheet feeder 50.
Each image forming device 10 (Y, M, C, or K) has a rotating photoconductor drum 11, and the following respective devices are arranged around the photoconductor drum 11. The peripheral devices are a charging device 12 that charges an image holding surface (a surface portion that holds a toner image) of the photoconductor drum 11 with a required potential, an exposure device 13 that irradiates the charged image holding surface of the photoconductor drum 11 with light based on image information (signal) to form an electrostatic latent image (for each color) with a potential difference, a developing device 14 that develops the electrostatic latent image with a toner in a corresponding color (Y, M, C, or K) to form a toner image which is a visible image, a primary transfer device 15 that transfers the toner image to (the intermediate transfer belt 21 of) the intermediate transfer device 20, and a cleaning device 16 that scrapes off and cleans adhering matter, such as toner remaining and adhering to the image holding surface of the photoconductor drum 11 after the transfer.
The photoconductor drum 11 is provided by forming an image holding surface having a photoconductive layer (photosensitive layer) made of a photosensitive material on the peripheral surface of a cylindrical or columnar base material that is subjected to grounding treatment, and is supported by a supporting member of the body 1a so as to receive the power from a rotation drive unit (not shown) and rotates in a direction shown by an arrow. As the charging device 12, a contact type charging device including a contact member, such as a charging roll that is arranged in contact with the image holding surface of the photoconductor drum 11 and has a charging voltage applied thereto, is adopted. In a case where the developing device 14 is one that performs reversal development, as the charging voltage, the same polarity of voltage as the charging polarity of a toner supplied from the developing device is applied.
The exposure device 13 is configured so as to be collected in one housing with respect to the four image forming devices 10 (Y, M, C, and K), and individually emit light components corresponding to the photoconductor drums 11 of the respective image forming devices 10, and is arranged below the four developing devices 14. As the exposure device 13, a laser beam scan type exposure device is used.
The developing device 14 has a developer storage part that stores a developer (for example, a two-component developer containing a nonmagnetic toner and a magnetic carrier) in any one color of the above four colors (Y, M, C, and K), and has a developing roll 141 that holds the developer stored in the developer storage part while rotating the developer and transports the developer to a developing region that faces the photoconductor drum 11, and agitating and transporting members 142 and 143 that rotates the stored developer while agitating the developer, and transports the developer to the developing roll 141. Additionally, in the developing device 14, a development voltage including a direct-current component on which an alternating-current component is superimposed is applied to the developing roll 141, and the developing roll 141 and the agitating and transporting members 142 and 143 are rotated in a required direction. The toner of the developer is agitated within the developer storage part by the agitating and transporting members 142 and 143, and thereby frictionally charged with a required polarity (a negative polarity in the exemplary embodiment) by rubbing against the carrier. Moreover, the developing device 14 is replenished with a developer (a developer containing only a toner and a developer containing a toner and a carrier) in a required color from the developer cartridge 84 (Y, M, C, or K) according to the consumption amount of the developer.
As the primary transfer device 15, a contact type transfer device including a primary transfer roll that rotates in contact with the image holding surface of the photoconductor drum 11 via the intermediate transfer belt 21, and has a primary transfer voltage applied thereto is used. In the primary transfer device 15, a voltage (a direct-current voltage having a polarity reverse to the charging polarity of a toner) of a direct-current component is applied to the primary transfer roll as the primary transfer voltage. Incidentally, the primary transfer roll of the primary transfer device 15 is supported on the supporting member side of the intermediate transfer device 20.
The intermediate transfer device 20 is mainly constituted by the endless intermediate transfer belt 21 that rotates in a direction shown by an arrow while passing through the primary transfer position between the photoconductor drum 11 and the primary transfer device 15 (primary transfer roll) in each image forming device 10 (Y, M, C, or K), plural supporting rolls 22 to 24 that rotatably support the intermediate transfer belt 21 from the inner peripheral surface thereof, a secondary transfer roll 31 that rotates in contact with the outer peripheral surface of the intermediate transfer belt 21 supported by the supporting roll 24 with a predetermined pressure, and a belt cleaning device 28 that removes toner or the like, which remains on and adheres to the outer peripheral surface of the intermediate transfer belt 21 after passing through the secondary transfer roll 31.
As the intermediate transfer belt 21, for example, an intermediate transfer belt formed from an endless belt having a required thickness using a material in which a conductivity imparting agent, such as carbon, is dispersed in a synthetic resin, such as polyimide resin or polyamide resin, is used. The supporting roll 22 is constituted as a driving roll, the supporting roll 23 is constituted as a tensioning roll, and, the supporting roll 24 is constituted as a facing roll of the secondary transfer section. Among these, a secondary transfer voltage including a direct-current component having the same polarity (or reverse polarity) as the charging polarity of a toner is applied to the supporting roll 24 at a required timing. As for the secondary transfer voltage, a direct-current component of a polarity reverse to the charging polarity of a toner may be applied to the secondary transfer roll 31.
As the sheet feeder, the accommodation type sheet feeder 50 and a manual type sheet feeder 90 as will be described below are used. The two types of sheet feeders 50 and 90 are arbitrarily selected and used.
The accommodation type sheet feeder 50 is arranged in a state where the sheet feeder is present below the exposure device 13 in a lower part of the internal space of the body 1a. The sheet feeder 50 is mainly constituted by a box-shaped sheet accommodation member 51 (sheet cassette) that is attached so as to be capable of being pulled out from a side surface portion of the front surface of the body 1a, and accommodates the recording sheet 5 of desired sizes, types, or the like, in a stacked state, and a delivery device 52 that delivers the recording sheet 5 accommodated in the sheet accommodation member 51 sheet by sheet from upper sheets. The front surface of the body 1a is a side surface set so as to turn to a user when the image forming apparatus 1 is installed, and corresponds to a left side surface shown in
A sheet transporting path for sheet feeding that transports the recording sheet 5 delivered from the sheet feeder 50 to the secondary transfer position is provided in a portion between the delivery device 52 of the sheet feeder 50, and the secondary transfer positions (the position where the intermediate transfer belt 21 and the secondary transfer roll 31 come into contact with each other) of the intermediate transfer device 20 in the internal space of the body 1a. The sheet transporting path for sheet feeding is constituted by the sheet transporting roll pair 58, the transporting and guiding member, and the like. Among these, the sheet transporting roll pair 58 is constituted as a feed-in adjusting roll pair that has, for example, a function of adjusting the transporting timing or transporting posture of the recording sheet 5.
The fixing device 40 is arranged in a state where the fixing device is present above the secondary transfer position in the intermediate transfer device 20. The fixing device 40 is configured by arranging, inside the housing 41, a heating roll 42 heated by a heating unit so as to rotate in a direction shown by an arrow and so that the surface temperature thereof is maintained at a predetermined temperature, and a pressurizing rotary member 43 of a roll type, a belt type, or the like that rotates to follow the heating roll 42 in contact with the heating roll with a predetermined pressure substantially along the axial direction of the heating roll. A transporting and guiding member that is not shown is arranged between the fixing device 40 and the secondary transfer section of the intermediate transfer device 20, and the recording sheet ejected from the secondary transfer section is guided by the transporting and guiding member so as to be introduced into the fixing device 40. Additionally, a sheet transporting path for ejection that transports and ejects the recording sheet 5 after the fixing that is ejected from the fixing device 40 to the ejection and accommodation section 60 is provided between the fixing device 40 and the ejection and accommodation section 60 (sheet ejection port 64a). The sheet transporting path for ejection is constituted by the sheet transporting roll pair 64, the transporting and guiding member, and the like.
Operation Regarding Image Formation
Formation of a basic image by the image forming apparatus 1 is performed as follows.
First, in the image forming apparatus 1, for example, an operation pattern (full color mode) in which a full color image configured by combining toner images in four colors (Y, M, C, and K) formed using all the four image forming devices 10 (Y, M, C, and K) is formed, and an operation pattern (monochrome mode) in which a monochrome image configured with a toner image in one color formed using one of the four image forming devices 10 (Y, M, C, and K) is formed may be selected and performed. The monochrome mode in Exemplary Embodiment 2 is set as a black-and-white mode in which a black-and-white image configured with a toner image in a black color (K) is formed.
Here, an image forming operation when the full color mode is selected will be described.
In this case, first, in the four image forming devices 10 (Y, M, C, and K), the respective photoconductor drums 11 rotate in the direction of an arrow, and the respective charging devices 12 charge the image holding surfaces of the respective photoconductor drums 11, respectively, with required polarity (for example, negative polarity in Exemplary Embodiment 2) and potential. Additionally, the exposure devices 13 perform exposure (scanning exposure of a laser beam LB) based on image signals decomposed into respective color components (Y, M, C, and K) on the photoconductor drum 11 after the charging, and form electrostatic latent images in the respective color components configured with a predetermined potential difference, respectively. Moreover, the respective developing devices 14 supply toners in respective colors (Y, M, C, and K) charged with a required polarity (negative polarity) using the developing roll 141 to the electrostatic latent images of the respective color components formed on the photoconductor drums 11 and cause the toners to adhere to the photoconductor drums electrostatically, thereby performing visualization (development) as toner images.
Next, in the respective image forming devices 10 (Y, M, C, and K), the toner images in the respective colors formed on the photoconductor drum 11 are primarily transferred sequentially to the intermediate transfer belt 21 by transfer electric fields formed by the primary transfer devices 15, and are overlapped with each other, at the primary transfer positions where the respective photoconductor drums 11 and the intermediate transfer belt 21 of the intermediate transfer device 20 come into contact with each other. Subsequently, in the intermediate transfer device 20, the toner images primarily transferred to the intermediate transfer belt 21 are secondarily transferred to the recording sheet 5 transported via the sheet transporting path for sheet feeding from the sheet feeder 50 by a transfer electric field formed by the secondary transfer roll 31 at the secondary transfer position.
The recording sheet 5 that has completed the secondary transfer is peeled off from the intermediate transfer belt 21, and then is moved toward and introduced into the fixing device 40. In the fixing device 40, the toners of the toner images are melted and fixed on the sheet 5 by causing the recording sheet 5, on which the toner images are transferred, to pass through the contact portion between the heating roll 42 and the pressurizing rotary member 43, and heating and pressurizing the contact portion. The recording sheet 5 after the fixing is completed is ejected to the outside of the body 1a from the sheet ejection port 64a via the sheet transporting path for ejection and is accommodated in the ejection and accommodation section 60, in a case where image formation is performed on one surface.
As above, a full color image configured by combining the toner images in four colors is formed on one recording sheet 9.
Configuration of Characterizing Portion of Image Forming Apparatus
Incidentally, in Exemplary Embodiment 2, the left surface of the image forming apparatus body 1a includes a manual sheet feeder 90.
The manual sheet feeder 90, as shown in
In a case where sheet feeding is performed and selected from the manual sheet feeder 90, the sheet feeding is performed as follows. That is, in the manual sheet feeder 90, upper sheets in plural recording sheets 5 placed on the manual feed tray body 95 is delivered sheet by sheet to a sheet transporting path 110 for manual sheet feeding by the delivery roll 91a of the delivery device. In the sheet transporting and guiding path 110, the delivered recording sheet 5 is transported so as to pass through the transporting path space of the transporting guide pair 113 of the transporting force of the first sheet transporting roll pair 111 and the second sheet transporting roll pair 112, and then, the tip portion of the sheet 5 is put on the stack plate 51a of the sheet feeder 50 (or the upper surface of the accommodated recording sheet 5). Thereafter, the recording sheet 5 is transported to the secondary transfer position through the sheet transporting path for sheet feeding by being delivered by the delivery device 52 of the sheet feeder 50.
The above manual feed tray body 95, as shown in
The end portion 103 of the apparatus body is provided at the body 1a of the image forming apparatus 1 so that the apparatus body faces the base end portion 95a of the manual feed tray body 95 on the rotating shaft side via the gap G. The inclined surface 104 that inclines toward the inside of the image forming apparatus body 1a is formed at a position that faces the base end portion 95a of the manual feed tray body 95 in the end portion 103, and the elastic member 105 with a rectangular cross-section that is made of a soft elastic body, such as urethane foam or silicone rubber, is attached to the inclined surface 104 by means of bonding or the like using the double-sided tape 106. The above inclined surface 104 is formed in a state where the inclined surface inclines toward the inside of the image forming apparatus body 1a, and is covered with the manual feed tray body 95 in a storage state, and the elastic member 105 is configured to be difficult to view from the outside.
Operation of Characterizing Portion of Image Forming Apparatus
In the image forming apparatus related to this Exemplary Embodiment 2, it is possible to suppress leakage of sound from the gap of the opening and closing member and an occurrence of an impact sound at the time of operation, using a single member, as follows.
That is, in the image forming apparatus 1 related to this Exemplary Embodiment 2, as shown in
Therefore, when the manual sheet feeder 90 is not used, the gap G formed between the manual feed tray body 95 and the image forming apparatus body 1a is blocked by the elastic member 105, and this prevents or keeps the operating sound of the image forming apparatus 1 from leaking to the outside from the gap G between the manual feed tray body 95 and the image forming apparatus body 1a.
On the other hand, as shown in
Configuration of Characterizing Portion of Image Forming Apparatus
That is, in Exemplary Embodiment 3, as shown in
Additionally, the inclined surface 107 of the end portion 103 that faces the inclined surface 104 is formed at the lower end portion of the above manual feed tray body 95 in a state where the inclined surface inclines toward the outside of the image forming apparatus body 1a. The surface of the elastic member 105 is set so as to incline toward the outside from the rotational track of the manual feed tray body 95. The reason is as follows. That is, when the manual feed tray body 95 is rotated in an opening direction, the manual feed tray body moves in a circular-arc shape about the rotating shaft 102 so that an outer end portion of the inclined surface 107 of the manual feed tray body 95 comes into pressure contact with the elastic member 105. Therefore, the manual feed tray body does not enter the rotational track and a contact portion between the outer end portion of the inclined surface 107 and the elastic member 105 decreases. Thus, operation is kept from becoming heavy due to the pressure of the elastic member 105. Moreover, the internal distance of the image forming apparatus body 1a may be set to be wider than the outer distance thereof. Then, a situation in which the outer end portion of the inclined surface 107 of the manual feed tray body 95 comes into pressure contact with the inclined surface 104 of the end portion 103 via the elastic member 105 is avoided, and the manual feed tray body 95 becomes smoothly rotatable.
In addition, in
Operation of Characterizing Portion of Image Forming Apparatus
In the image forming apparatus related to this Exemplary Embodiment 3, it is possible to suppress leakage of sound from the gap of the opening and closing member and occurrence of an impact sound at the time of operation, using a single member, as follows.
That is, in the image forming apparatus 1 related to this Exemplary Embodiment 3, as shown in
Therefore, when the manual sheet feeder 90 is not used, the gap G formed between the manual feed tray body 95 and the image forming apparatus body 1a is blocked by the elastic member 105, and this prevents or keeps the operating sound of the image forming apparatus 1 from leaking to the outside from the gap G between the manual feed tray body 95 and the image forming apparatus body 1a.
On the other hand, as shown in
In addition, in the above exemplary embodiments, a case where the opening and closing door is applied to the manual feed tray 94 has been described. However, the opening and closing member is not limited to the manual feed tray, and it is natural that the opening and closing member may also be similarly applied to a sheet ejection tray provided so as to be openable and closable with respect to the image forming apparatus body, a cover that is opened, for example, at the time of jam clearance, or the like.
Additionally, in the above exemplary embodiments, the image forming apparatus has been described as the apparatus having the driving source. However, the apparatus is not limited to the image forming apparatus, and it is natural that other apparatuses may be adopted so long as the apparatuses are apparatuses having a driving source, and including an opening and closing door that is opened and closed by rotational operation about a rotating shaft with respect to a body of each apparatus.
The foregoing description of the exemplary embodiments of the present invention has been provided for the purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations will be apparent to practitioners skilled in the art. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, thereby enabling others skilled in the art to understand the invention for various embodiments and with the various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the following claims and their equivalents.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2012-247429 | Nov 2012 | JP | national |
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