The present invention generally relates to the technical field of container transportation, and more specifically to a lockset and a pallet loading bin having the same.
In order to facilitate the loading and unloading of cargos and the stacking transport of empty pallet loading bin, the end and side walls of the pallet loading bin are usually set in a detachable or foldable form. The end wall of the pallet loading bin needs to be provided with a lockset connected with an adjacent side wall stand column to lock the adjacent end wall and side wall together so as to keep them relatively fixed when loading cargoes.
As shown in
In order to increase the volume of the pallet loading bin and reduce the height of the pallet loading bin after being folded, thereby increasing the loading capacity of the pallet loading bin and the transportation amount of empty boxes, and reducing the logistics transportation cost, the thickness of the end and side walls of the existing pallet loading bin are currently designed to be as small as possible, which is not applicable to the lockset of the prior art.
Therefore, a lockset and a pallet loading bin having the same need to be provided to at least partially solve the above problem.
In order to at least partially solve the above problem, the present invention provides a lockset for a pallet loading bin, on which a lock hole corresponding to the lockset is provided, the lockset comprises a lock bar, a first end of which being provided with a hook head matched with the lock hole to realize locking, the lock bar being provided with a connection portion, wherein the lock bar is rotatably connected to a body of the pallet loading bin through the connection portion, and as the lock bar rotates around the connection portion in a plane parallel to an outer surface of the body, the hook head extends into or retracts from the lock hole to realize locking or unlocking of the lockset; and a handle, which comprises a connection end, wherein the handle is rotatably connected to a second end of the lock bar opposite to the first end through the connection end, and as the handle rotates around the connection end, a position of the handle changes between positions that are close to or far away from an adjacent outer surface of the body.
Optionally, a lock seat is further comprised; the lock seat is fixedly connected to the body; and the lock bar is rotatably connected to the lock seat through the connection portion.
Optionally, the lock seat is provided with a reinforcing plate, and the lock bar is rotatably connected to the reinforcing plate through the connection portion.
Optionally, a support portion is further comprised so that when the lockset is in an unlocked state, the handle is supported by the support portion.
Optionally, a limiting portion is further comprised so that when the lockset is in a locked state, the handle is fixed by the limiting portion.
Optionally, the second end of the lock bar is provided with a U-shaped groove; an opening of the U-shaped groove faces away from the pallet loading bin; the connection end of the handle is inserted into the U-shaped groove and connected via a connecting shaft passing through two side walls of the U-shaped groove; and the handle is rotatable around the connecting shaft.
Optionally, one end of the U-shaped groove away from the handle is enclosed to increase strength.
Optionally, one side of the end portion of the connection end facing a bottom wall of the U-shaped groove is provided with a first inclined surface to prevent the connection end from interfering with the bottom wall of the U-shaped groove when the handle is rotated.
Optionally, a torsion spring is further comprised, and the torsion spring has a first force bearing end and a second force bearing end, wherein the torsion spring is sleeved on the connecting shaft; the first force bearing end abuts against a bottom wall of the U-shaped groove, and the second force bearing end abuts against the handle so that the handle abuts against the body under an elastic force of the torsion spring.
Optionally, the connection end of the handle is provided with a groove; the connecting shaft penetrates through the groove; and the torsion spring is arranged in the groove.
Optionally, the handle is provided with a limiting groove in a position corresponding to the second force bearing end of the torsion spring so as to limit the torsion spring.
Optionally, the connection end of the handle is provided with a U-shaped opening; the second end of the lock bar is inserted into the U-shaped opening and connected via a connecting shaft passing through two side walls of the U-shaped opening using a connecting shaft; and the handle is rotatable around the connecting shaft.
Optionally, a thickness of a portion of the handle away from the connection end is less than a thickness of the connection end, so that a sufficient distance is kept between the portion of the handle away from the connection end and the outer surface of the body.
Optionally, the first end of the lock bar is provided with a stop portion, and an extension direction of the stop portion is opposite to an extension direction of the hook head, wherein when the lockset is in a locked state, a tail end of the stop portion is close to or abuts against a side wall of the lock hole.
Optionally, the tail end of the stop portion is provided with a chamfer to prevent the stop portion from interfering with the side wall of the lock hole.
Optionally, when the handle is parallel to the hook head, the handle is opposite to the hook head in an extension direction.
According to another aspect of the present invention, a pallet loading bin is provided, wherein the pallet loading bin comprises any of the locksets as described above.
The lockset according to the present invention has a simple structure and low costs, can be processed and manufactured easily, can be operated flexibly with less effort, and can adapt to the situation of small thicknesses of an end wall and a side wall of a pallet loading bin.
The following drawings of the present invention are hereby incorporated as part of the present invention for the understanding of the present invention. In the drawings,
In the following descriptions, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it is obvious to the skilled in this art that the present invention may be implemented without one or more of these details. Some technical features well-known in this art are not described in other examples so as to avoid confusion with the embodiment of present invention.
The present invention discloses a lockset for pallet loading bin, which is used for connecting an end wall and a side wall of a pallet loading bin, and is particularly suitable for the end wall structure with a small distance between the outer surface of the end wall plate and the outer surface of the end wall stand column.
As shown in
One end of the lock bar 120 is provided with a hook head 121 which is perpendicular to the lock bar 120 and extends outwards from the lock bar 120; a lock hole is provided on the pallet loading bin at a position corresponding to the mounting position of the lockset 100; and the lockset 100 realizes the locking of the pallet loading bin through the cooperation of the hook head 121 and the lock hole. The middle of the lock bar 120 is provided with a shaft hole 122, and the plane where the shaft hole 122 is located is parallel to the plane where the lock bar 120 and the hook head 121 are located. As shown in
A handle mounting portion 123 is provided on the second end of the lock bar 120 opposite to the hook head 121. The handle 110 is mounted to the lock bar 120 through the handle mounting portion 123, and is rotatable around the handle mounting portion 123, so that when the lockset 100 is mounted to the pallet loading bin, with the rotation of the handle 110 around the handle mounting portion 123, the angle between the handle 110 and the outer surface of the pallet loading bin changes within a predetermined range. Specifically, as shown in
As shown in
A groove portion 112, penetrating the handle 110 in the thickness direction thereof, is disposed at the connection end 111 of the handle 110, wherein the mounting holes 115 are located on two side walls of the groove portion 112 along the length direction of the handle 110, that is, when the handle 110 is mounted to the lock bar 120, the connecting shaft 127 passes through the groove portion 112. Preferably, a torsion spring 130 is sleeved on the connecting shaft 127 and is located in the groove portion 112. As shown in
Preferably, a limiting groove 113 is provided in a position on the handle 110 where the second force bearing end 132 abuts, and the second force bearing end 132 is located in the limiting groove 113, which can keep the position of the torsion spring 130 fixed and prevent the torsion spring 130 from moving up and down along the axial direction of the connecting shaft 127. Further preferably, an escape groove 114 is provided in a side face of the handle 110 facing the bottom wall 125, and the position of escape groove 114 is corresponding to the first force bearing end 131 of the torsion spring 130, so that when the handle 110 rotates around the connecting shaft 127, the first force bearing end 131 enters the space of the escape groove 114 to prevent the connection end 111 from interfering with the first force bearing end 131 to affect the rotation of the handle 110.
Due to the groove portion 112, there is certainly a distance between the mounting hole 115 and the end portion of the connection end 111. In this way, under the condition that the thickness of the handle mounting portion 123 is limited, when the handle 110 is rotated, the end portion of the connection end 111 would interfere with the bottom wall 125 of the handle mounting portion 123, thereby affecting the rotation of the handle 110. Therefore, a first inclined surface 116 is provided on a side face of the end portion of the connection end 111 facing toward the bottom wall 125, and as shown in
As shown in
Preferably, a stop portion 129 is provided on one end of the lock bar 120 where the hook head 121 is provided. The stop portion 129 extents in a direction opposite to the extension direction of the hook head 121, and the length and the position of the stop portion 129 are set in advance so that when the lockset 100 is locked, the lower end of the stop portion 129 is abutted against or close to the lower side wall of the lock hole 22. Further preferably, the length of the lock hole 22 is set in advance so that the side of the lock bar 120 connected with the hook head 121 abuts against the upper side wall of the lock hole 22, that is, the distance A between the tail end of the stop portion 129 and the side of the lock bar 120 connected with the hook head 121 is equal to or slightly smaller than the length B of the lock hole 22, thereby preventing the side wall from moving up and down and making the locking firmer. Preferably, a chamfer intersecting with the lower side of the stop portion 129 is provided on the tail end of the stop portion 129, which may avoid the interference between the stop portion 129 and the lower side wall of the lock hole 22 in the locking and loosening movement process.
Preferably, a first limiting portion 151 and a second limiting portion 152 are disposed on the lock seat 150 at a position corresponding to the handle 110 when the lockset 100 is locked; the first limiting portion 151 and the second limiting portion 152 fix the handle 110 to keep the lockset 100 in a locked state, and to keep the handle 110 in a state of abutting against the end wall plate 10, so as to prevent the handle 110 from rotating around the connecting shaft 127 to be protruded out of the outer surface of the end wall plate 10 resulting in unlocking or damage caused by collision. The first limiting portion 151 and the second limiting portion 152 can be fixedly connected to the lock seat 150 in a manner such as welding, and can also be integrally formed with the lock seat 150.
On the side of the first limiting portion 151 facing the handle 110, a hemispherical protrusion portion 153 as shown in
When the lockset 100 is in an unlocked state, the handle 110 being subjected to the force of gravity may cause the lockset 100 to have a tendency to rotate around the positioning shaft 140 toward the locked position, and thus a support portion 154 is provided on the lock seat 150 to support the handle 110 in an unlocked state, so as to prevent the lockset 100 from being automatically rotated and locked under the driving of the handle 110. The support portion 154 can be fixedly connected to the lock seat 150 in a manner such as welding, and can also be integrally formed with the lock seat 150. Preferably, the position of the support portion 154 can correspond to the positions of the first guiding surface 118 and the second guiding surface 119.
Preferably, as shown in
It should be pointed out that the purpose of providing the lock seat and the reinforcing plate is to increase the strength of the pallet loading bin, and prevent the body of the pallet loading bin from being damaged due to excessive force on the lockset when the lockset is locked. On the premise of ensuring the strength, the lockset may be mounted directly to the outer surface of the pallet loading bin without providing a reinforcing plate or even without a lock seat. At this time, the limiting portion and the support portion can be directly connected to the outer surface of the pallet loading bin.
According to the lockset 100 shown in the present invention, the locking process is as below:
As shown in
After the lock bar 120 is locked, the handle 110 faces an area between the first limiting portion 151 and the second limiting portion 152. The handle 110 is pushed in the direction towards the end wall plate 10. Firstly, the second guiding surface 119 of the handle 110 is in contact with the protrusion portion 153, and meanwhile another side of the handle 110 is in contact with the vertical edge of the second limiting portion 152; the handle 110 is pushed by force so that the protrusion portion 153 crosses the second guiding surface 119 and is located outside the first guiding surface 118 to block the first guiding surface 118 and fix the handle 110. At this time, the inner side of the handle 110 is attached to the end wall plate 10; the protrusion portion 153 ensures that the handle 110 cannot freely rotate outside the box; the torsion spring 130 further enables the handle 110 to be tightly attached to the end wall plate 10 to prevent the handle 110 from rotating out of the box and prevent the handle 110 from protruding out of the body; the first limiting portion 151 and the second limiting portion 152 can also ensure that the handle 110 cannot swing left and right. This completes the locking of the end wall and side wall of the pallet loading bin by the lockset 100.
The unlocking process of the lockset 100 shown in the present invention is as below:
As shown in
As shown in
The structure of the lockset 200 is substantially same as that of the lockset 100, except that the connection end 211 of the handle 210 is not provided with a groove portion as that of the handle 110, and no torsion spring is mounted. The handle 210 does not need to overcome the acting force of the torsion spring during the lifting process; when the lockset 200 is in a locked state, there is no action force on the handle 210 given by the torsion spring, and the handle 210 is only restrained by cooperation of the first limiting portion 251 and the second limiting portion 252 from rotating toward outside of the box so as to achieve the effect of limiting and fixing.
The lockset 200 according to the second embodiment has the same operation mode as the lockset 100 according to the first embodiment, which is not repeated here.
As shown in
The lockset 300 differs from the lockset 100 and the lockset 200 in that the handle mounting portion 323 of the lock bar 320 is T-shaped; the vertical wall of the T-shape corresponds to the two side walls of the U-shaped groove; the connection end 311 of the handle 310 is provided with a U-shaped opening; the vertical wall of the T-shape is inserted into the U-shaped opening of the handle 310 and they are connected together by the connecting shaft 327.
When the lockset 300 is in a locked state, the hook head 321 is downward; the hook head 321 is perpendicular to the handle 310; and the handle 310 is fixed by the first limiting portion 351 and the second limiting portion 352. When the lockset 300 is to be unlocked, the handle 310 is first lifted by about angle F to disengage from the constraints of the first limiting portion 351 and the second limiting portion 352; the handle 310 is rotated downward, and the lock bar 320 rotates around the positioning shaft 340 until the hook head 321 retracts into the end wall stand column 31; at this time, the handle 310 naturally droops under its own gravity, and is substantially parallel to the end wall stand column 31.
The lockset according to the third embodiment is simple in structure; the support portion is omitted, and the operation is labor-saving. However, when the lockset is in a locked state, the reliability of fixing of the handle is not as good as that in the first and second embodiments. In the same case where the torsion spring is not provided, the reliability of fixing of the handle is not as good as that in the second embodiment. When the lockset is in an unlocked state, the handle is not restrained by other force except for its own gravity, so that the handle would swing around due to the external force, and its stability is not as good as that in the first and second embodiments; the hook head may rotate around the positioning shaft due to the external force, so that the hook head extends out of the end wall stand column and blocks the assembly or folding of the end wall.
According to another aspect of the present invention, a pallet loading bin is provided, and the pallet loading bin comprises any of the locksets described above.
The pallet loading bin lockset according to the present invention has a simple structure and low costs, can be processed and manufactured easily, can be operated flexibly with less effort, and can adapt to the situation of small thicknesses of an end wall and a side wall of a pallet loading bin.
The present invention has been described by way of the above embodiments, but it is to be understood that the above-described embodiments are for illustrative and explanatory purposes only and are not intended to limit the invention to the scope of the described embodiments. In addition, it will be understood by those skilled in the art that various modifications and variations can be made in accordance with the teachings of the present invention, which fall within the scope of the invention as claimed. The protection scope of the present invention is defined by the appended claims and its equivalent scope.
Number | Date | Country | Kind |
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201710193903.X | Mar 2017 | CN | national |
The present disclosure is a continuation of International Application No. PCT/CN2018/079471, titled “Lockset and pallet loading bin having same,” filed on Mar. 19, 2018, the entire subject matter and contents thereof are incorporated herein by reference.
Number | Date | Country | |
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Parent | PCT/CN2018/079471 | Mar 2018 | US |
Child | 16551678 | US |