Embodiments of the present invention will hereinafter be described with reference to the drawings.
A low-temperature showcase 1 of this embodiment is a so-called desk-top showcase in which four surrounding surfaces of a showroom 4 are surrounded with transparent walls 6 . . . made of double transparent glass. An insulating wall 7, supports 8 . . . vertically disposed at four corners of this insulating wall 7, a top plate 9 and the transparent walls 6, 6 of left and right surfaces held by these insulating wall 7, supports 8 and top plate 9 and the like constitute a main body 11. A bottom plate 12 also made of a hard synthetic resin is attached to an upper surface of the insulating wall 7 disposed inwardly from the transparent walls 6, 6 of the left and right surfaces, and the showroom 4 is constituted in the main body 11 defined by these bottom plate 12, top plate 9 and left and right transparent walls 6, 6.
According to such a constitution, a front surface and a rear surface of a showroom 4 part of the main body 11 are opened. Moreover, the front and rear openings are openably closed by two transparent doors 2, 2. It is to be noted that the same door is used in the front and rear transparent doors 2, 2. Upper and lower portions of the front and rear transparent doors 2, 2 on the right as one faces are rotatably supported by and attached to the top plate 9 and the bottom frame 7 of the main body 11. The transparent doors 2 include peripheral sashes 14 made of a hard synthetic resin, and the transparent walls 6 made of double transparent glass and held inwardly from the sashes 14. A handle 3 is attached to one side of an outer surface (a front surface) on an unsupported side, that is, substantially the center of the outer surface (the front surface) of a left side (a side on the unsupported side of each transparent door 2) of the sash 14 as one faces. It is to be noted that G is a magnet gasket attached to a periphery of an inner surface of the sash 14. When the transparent door 2 is closed, the gasket is adsorbed by an angle 8A disposed in the support 8 and made of a steel plate constituting the support 8.
Moreover, a mechanical chamber 13 is constituted under the insulating wall 7 and positioned under the showroom 4. In this mechanical chamber 13, a compressor and a condenser (not shown) which constitute a refrigerant circuit of a cooling unit are arranged, and a fan for the condenser is installed in order to cool the compressor and the condenser with air. Moreover, a cooling chamber (not shown) is constituted in the insulating wall 7. In this cooling chamber, an evaporator (not shown) constituting the refrigerant circuit of the cooling unit together with the compressor and the like, and a fan for cooling are stored. A bottom plate 12 is provided with a cold air suction port and a cold air discharge port (not shown) positioned at a bottom part of the showroom 4, and the ports communicate with the cooling chamber of the insulating wall 7. It is to be noted that reference numerals 16 are mesh racks arranged in the showroom 4.
When the compressor is operated, the evaporator performs a cooling function. Cold air of the cooling chamber cooled by heat exchange performed between the evaporator and the cooling chamber is sucked by the fan for cooling, and discharged upwards from the cold air discharge port into the showroom 4. The cold air discharged into the showroom 4 flows upwards and is circulated through the showroom 4 to cool the commodities on the racks 16 and the like. Subsequently, the air flows downwards to return from the cold air suction port into the cooling chamber. In consequence, the inside of the showroom 4 is cooled at a predetermined temperature (usually a refrigeration temperature of +5° C. to +10° C.).
Next, the transparent doors 2 and the handles 3 will be described in detail. It is to be noted that, as the transparent doors 2 of the embodiment, the same door is vertically inverted and used. In consequence, it is constituted that a case where the right of the door as one faces is supported as in the embodiment and a case where the left of the door is supported can be selected.
As shown in
That is, in
That is, the handle 3 is positioned on the unsupported side of the transparent door 2 (on the left as one faces in the embodiment). As shown in
As shown in
A hook 22 is attached to the other end portion of this rotary shaft 21. In this case, a fitting hole 26 is formed at a base portion of the hook 22. This fitting hole 26 is fitted into the rotary shaft 21, when the hook is attached. This hook 22 is attached in a direction crossing the rotary shaft 21 at right angles. The hook protrudes toward the main body 11 from a through hole 23 formed at an inner surface of the sash 14 outside the gasket G so that the hook is directed from the handle 3 toward the support 8 in a state in which the transparent door 2 is closed. A tip end portion of the hook 22 is provided with a hook portion 22A. It is to be noted that, in a case where the transparent door 2 is supported on the right as one faces as in the embodiment, this hook portion 22A is directed downwards (
On the other hand, as shown in
Moreover, the angles 8A positioned at the front surfaces of the left and right supports 8, 8 constituting the opening end surface of the main body 11 are provided with slit-like engagement holes 24, 24. Each engagement hole 24 is formed outside a position where the gasket G is adsorbed, and the left engagement hole 24 as one faces is set at a height corresponding to that of a position of the locking device 17 of the transparent door 2. Here, in a case where the transparent door 2 is vertically inverted and attached, that is, in a case where the left of the door as one faces is supported, unlike the embodiment in which the right of the door as one faces is supported, the right engagement hole 24 as one faces is positioned so that the hook 22 of the locking device 17 engages with the engagement hole. The locking device 17 is positioned at the lower portion of the handle 3 as described above. Therefore, when the transparent door 2 is vertically inverted and attached, the locking device 17 is disposed above the hand portion 18. Therefore, since the position of the locking device 17 is raised, the right engagement hole 24 as one faces is positioned to be higher than the left engagement hole 24 as one faces (
Furthermore, when the transparent door 2 is not locked, in
To unlock the door, the key is rotated in reverse. In consequence, since the hook 22 rotates clockwise in
Moreover, the key is inserted into the keyhole 19 from the supported side of the transparent door 2. Therefore, even when the side surface (the left side surface viewed from the front surface) of the main body 11 on the unsupported side of the transparent door 2 is installed so as to come in contact with a wall surface of a place where the showcase is installed, the locking device 17 can be locked/unlocked without any trouble.
Here, when a transparent door 2 is vertically inverted and attached, that is, when the door is attached to a main body 11 so as to rotatably support the left of the door instead of supporting the right as one faces as in the embodiment, a locking device 17 is also vertically inverted. Therefore, in this case, a hook portion 22A of a hook 22 is directed upwards, and engages with an engagement hole 24 (on the right side of the opening of the main body 11 as one faces) from below.
On the other hand, a rotary shaft 21 of this type of locking device 17 is provided with allowance, and the rotary shaft 21 and the hook 22 freely rotates as much as a predetermined angle. In a case where the hook 22 engages with the engagement hole 24 from above as shown in
In the embodiment, sides of the fitting hole 26A extending toward the hook portion 22A are formed in parallel with an axis of the hook 22 in a longitudinal direction. The center of the fitting hole 26B is the same as that of the fitting hole 26A, and the fitting hole 26B is formed in a state in which the hole turns (deviates) at a predetermined angle from a tip end of the hook portion 22A to a base portion of the hook portion.
Moreover, as shown in
Subsequently, when the transparent door 2 provided with such a locking device 17 is vertically inverted and attached to the main body 11, the fitting hole 26B of the hook 22 is fitted into the rotary shaft 21 and attached to the shaft. In a case where the fitting hole 26B is fitted in this manner, as compared with a case where the fitting hole 26A is fitted, an attaching angle of the hook 22 is changed to such a state that the hook portion 22A of the hook 22 moves at a predetermined angle toward a tip end of the hook and is attached to the rotary shaft 21. Therefore, in a state in which the hook portion 22A of the hook 22 is pulled from the engagement hole 24 owing to the rotation allowance of the rotary shaft 21 during this rotation and attachment as described above, the allowance is absorbed, and the hook 22 is substantially horizontally disposed. In consequence, even in the state in which the door is vertically inverted and attached, disadvantages that the engaged state between the hook 22 and the engagement hole 24 is loosened owing to the rotation allowance of the rotary shaft 21 and that the hook disengaged from the engagement hole owing to an engagement defect are eliminated.
It is to be noted that, in the embodiment, the present invention is applied to a low-temperature showcase in which the four surrounding surfaces of a showroom 4 are surrounded with transparent walls 6 and in which front and rear openings are openably closed with the transparent doors 2, 2. The present invention is not limited to the embodiment, and the present invention is effective even for a showcase in which an only front surface is openably closed with the transparent door 2.
Number | Date | Country | Kind |
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2006-197215 | Jul 2006 | JP | national |