Folding box bolt structure

Abstract

The utility model relates to the field of folding boxes, in particular to a folding box bolt structure which comprises a guide shaft, a bolt and a safety block, the guide shaft is arranged at the end of a bottom frame in the length direction and can axially rotate, the inside of the guide shaft is hollow, and axial limiting components are arranged at the two ends of the guide shaft respectively. Wherein one end part is closed and is provided with an operating member, and the other end part is open; the operating component drives the guide shaft to rotate so that the bolt can stretch out and draw back relative to the guide shaft. According to the utility model, the structure of a conventional bolt is improved, so that the telescopic action is completed in the guide shaft, the overall structure occupies less space, and the structural space of the end part of the folding box is saved; meanwhile, operation is simpler, the bolt can be stretched out and drawn back only by rotating the operating component, the locking state or the unlocking state can be completed, and locking of the bolt can be achieved only by operating the safety block after the bolt structure is in the locking state.

Description

Technical Field

[0001] The utility model relates to the field of folding boxes, in particular to a latch structure of a folding box. Background Art

[0002] A folding box is a special container, which generally includes a base frame and two end frames located at both ends of the base frame. Hinges are respectively arranged on both sides of the ends of the base frame. The hinges include a fixed hinge seat, a movable hinge seat and a rotating pin. The fixed hinge seat is fixed on the base frame, and the movable hinge seat is fixed on the end frame. The rotating pin crosses the fixed hinge seat and the movable hinge seat to pivot the two. In this way, the end frame is pivoted to the base frame by the hinge, so that the end frame can be folded and placed on the base frame during return transportation, so that multiple folding boxes can be stacked and stacked to reduce the space occupied when empty boxes are returned. When transporting goods in a folding box, the end frame needs to be erected, and the hinge needs to be locked by a latch mechanism installed on the base frame to lock the end frame with the base frame. The existing latch mechanism generally includes a latch, a latch hole is set on the fixed hinge seat and the movable hinge seat, the latch crosses the latch holes on the fixed hinge seat and the movable hinge seat, and the latch is moved horizontally to move the latch between the locked position and the released position. In order to fix the horizontal movement freedom of the latch at two positions, two card slots need to be opened on the latch, and a movable lock block is configured on the chassis. When the latch is moved horizontally to the locked position or the released position, the lock block needs to be respectively clamped on the two card slots on the latch. Although this latch mechanism can meet the use requirements of the folding box, it is necessary to configure the lock block on the chassis and slot the latch, which leads to a more complicated structure. In operation, one hand is required to pull the latch and the other hand is required to operate the lock block, which leads to a more complicated operation process and is extremely inconvenient to use. In addition, the current structure occupies more space, which often blocks the label light box information of the box. Utility Model Content

[0003] The utility model aims to provide a folding box latch structure to solve the problems raised by the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a folding box latch structure, wherein four sets of hinge devices are arranged at both ends of the bottom frame of the folding box, wherein the hinge devices include an inner hinge and an outer hinge which are pivotally connected, and the outer hinge is provided with two latch holes; each set of the hinge devices is correspondingly provided with a set of latch structures,

[0005] The latch structure comprises a guide shaft, a latch and a safety block. The guide shaft is arranged at the end of the base frame along the length direction and can rotate axially. The interior of the guide shaft is hollow. Both ends are provided with axial limiting members. One end is closed and provided with an operating member, and the other end is open. The latch is arranged inside the guide shaft. The operating member drives the guide shaft to rotate so that the latch can be extended and retracted relative to the guide shaft.

[0006] When the latch is extended out of the guide shaft to the maximum extent, it is in the locked state of the latch structure, the latch enters the two latch holes and locks the inner hinge, and the safety block can be operated to limit the movement of the operating component; when the latch is retracted into the guide shaft to the maximum extent, it is in the opened state of the latch structure, the latch leaves at least one of the latch holes and releases the inner hinge.

[0007] The beneficial effect of the present invention is that the structure of the conventional latch is improved so that the telescopic action is completed inside the guide shaft, the overall structure occupies less space, and the end structure space of the folding box is saved; at the same time, the present invention is simpler to operate, and the latch can be telescoped and locked or opened only by rotating the operating member. After the latch structure is in the locked state, the latch can be locked only by operating the safety block.

[0008] Preferably, the side wall of the guide shaft is provided with a spiral slide groove, the two ends of the slide groove are closed, and the surface of the latch is provided with a slider that cooperates with the slide groove. Thus, a specific embodiment is provided in which the latch can be pushed by rotating the guide shaft. Through this structure, the operator can convert the rotation of the guide shaft into the extension and retraction of the latch, thereby realizing the extension and retraction of the latch in a limited space.

[0009] Preferably, the latch structure is provided with two sets of mutually cooperating slide grooves and sliding blocks, thereby improving the accuracy of the latch extension and retraction.

[0010] Preferably, both ends of the guide shaft are provided with supports for providing support force, the supports are fixed to the base frame and provided with a circular opening for the guide shaft to pass through, thereby concretizing the setting position of the guide shaft and providing the possibility of axial rotation.

[0011] Preferably, the limiting member includes baffles respectively arranged on opposite sides of the two supports, and the baffles limit the axial movement of the guide shaft.

[0012] Preferably, a bolt is fixed at one end of the safety block, and a U-shaped groove is provided at the other end; the bolt is movably connected to the support and is vertical to the guide shaft in space, and when the latch structure is in a locked state, the bolt can be rotated to restrict the operating member to the U-shaped groove. Thus, the latch structure can be locked by limiting the position of the operating member.

[0013] Preferably, the operating member is a handle, the overall length of the handle is greater than the radius of the end of the guide shaft, one end of the handle is fixed at the center of the circle of the end of the guide shaft, and the other end can be clamped and limited by the safety block. This provides a specific embodiment of the operating member, which simplifies the operation of the latch structure and only requires rotating or limiting the handle. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the application of the latch structure of the prior art;

[0015] Figure 2 It is a schematic diagram of the locking state of the prior art latch structure;

[0016] Figure 3 It is a schematic diagram of the open state of the latch structure of the prior art;

[0017] Figure 4 It is an exploded structural diagram of an embodiment of a latch structure;

[0018] Figure 5 yes Figure 4 Schematic diagram of the actual application structure;

[0019] Figure 6 yes Figure 4 The main view of the application is in a locked state;

[0020] Figure 7 yes Figure 6 An enlarged schematic diagram of the middle latch structure;

[0021] Figure 8 yes Figure 4 The main view of the application in the overall open state;

[0022] Fig. 9 yes Figure 7 An enlarged schematic diagram of the middle latch structure. DETAILED DESCRIPTION

[0023] The folding box includes a base frame 1 and an end frame connected to the base frame 1 through a hinge device. A total of four sets of hinge devices are arranged at both ends of the base frame 1, which are respectively connected to the columns of the end frames so that the end frames can be folded on the base frame 1; wherein the hinge device includes an inner hinge 12 and an outer hinge 11 which are pivotally connected, the inner hinge 12 is the movable hinge seat mentioned in the background technology, and the outer hinge 11 is the fixed hinge seat mentioned in the background technology. The inner hinge 12 is fixed to the column, and the outer hinge 11 is fixed to the base frame 1. In order to lock the end frame and the inner hinge 12 in a vertical position, each set of hinge devices is additionally provided with a corresponding set of latch structures, and latch holes are provided on the two mutually parallel side panels of the outer hinge 11, through which the latch 3 can be inserted and lock the inner hinge 12 and the end frame. The utility model follows the structural idea of ​​the latch hole and designs a latch structure with simple structure, convenient operation and small space occupation. The latch structure is arranged as a whole on the opposite side of the two hinge devices located at the same end of the base frame 1. For the specific structure, please refer to Figure 4-9 .

[0024] This embodiment mainly includes a guide shaft 2, a latch 3 and a safety block 4, Figure 4 and Figure 5 , the guide shaft 2 is arranged at the end of the base frame 1 along the length direction, parallel to the wide side of the base frame 1 as a whole and perpendicular to the side plate of the external hinge 11, and the two ends of the guide shaft 2 are provided with supports 5 to provide support force, the two supports 5 are plate-shaped, parallel to each other and welded to the side of the base frame 1 facing the outside of the box, and a circular opening 52 is arranged on the support 5 for the guide shaft 2 to pass through. The two ends of the guide shaft 2 are provided with axial limiting members, and in this embodiment, the limiting members include baffles 51 respectively arranged on the opposite sides of the two supports 5, the baffles 51 are annular thin sheets and welded to the supports 5, which can block the two ends of the guide shaft 2 and limit the movement of the guide shaft 2 along the axial direction. As a result, the guide shaft 2 is limited inside the opening 52 of the support 5, and its axial position cannot be changed, and the two ends of the guide shaft 2 are limited by the baffles 51, and the guide shaft 2 can only rotate axially in the opening 52 of the support 5, and cannot move axially.

[0025] The guide shaft 2 is in the shape of a cylinder with an opening as a whole: the interior is hollow, one end is closed, and the other end is open. At the same time, a spiral slide groove 21 is provided on the side wall of the guide shaft 2, and both ends of the slide groove 21 are closed. The latch 3 is in the shape of a cylinder as a whole and is movably arranged in the internal space of the guide shaft 2. A slider 31 that cooperates with the slide groove 21 is provided on the surface of the latch 3, and the slider 31 can slide freely in the slide groove 21. The setting position of the slider 31 is close to one end of the latch 3, and the other end of the latch 3 without the slider 31 is passed through the open end of the guide shaft 2 and the middle of the baffle 51 at the end.

[0026] The closed end of the guide shaft 2 is provided with an operating member, and the operating member passes through the middle space of the end baffle 51 at the same time. In this embodiment, the operating member is a handle 22, which is in the shape of a flat rectangular parallelepiped as a whole and is perpendicular to the end surface of the guide shaft 2. The overall length of the handle 22 is greater than the radius of the end of the guide shaft 2, one end is welded and fixed at the center of the circle of the end of the guide shaft 2, and the other end protrudes from the side wall surface of the guide shaft 2. When the handle 22 is turned, the guide shaft 2 can be driven to rotate; the rotation of the guide shaft 2 means that the slide groove 21 on the side wall of the guide shaft 2 rotates, and the rotation of the slide groove 21 causes the slider 31 matched therewith to move along the direction of the slide groove 21, thereby driving the extension and retraction of the latch 3 inside the guide shaft 2.

[0027] In the present embodiment, two sets of mutually cooperating slide grooves 21 and sliders 31 are provided. The two slide grooves 21 on the side wall of the guide shaft 2 are axially symmetrically arranged, and the two ends of each slide groove 21 are respectively close to the two ends of the guide shaft 2, and the angle difference between the two ends of each slide groove 21 and the axis of the guide shaft 2 is exactly 180 degrees; the sliders 31 on the pin 3 are all close to the same end of the pin 3 and are axially symmetrically arranged, thereby utilizing double cooperation to improve the accuracy of the extension and retraction of the pin 3 when the guide shaft 2 rotates.

[0028] Therefore, the latch 3 can be extended and retracted relative to the guide shaft 2 under the control of the handle 22 and the guide shaft 2, but because the slider 31 is limited in the slide slot 21, the extended length of the latch 3 is only the axial distance between the two ends of the slide slot 21. The latch 3 has only two extreme positions relative to the guide shaft 2, one is to extend the guide shaft 2 to the maximum extent, at which time the slider 31 reaches the end of the slide slot 21 away from the handle 22, the handle 22 is in a vertical state, and the end of the handle 22 away from the guide shaft 2 is lower than the end directly connected to the guide shaft 2; the other is to retract the guide shaft 2 to the maximum extent, at which time the slider 31 reaches the end of the slide slot 21 close to the handle 22, the handle 22 is in a vertical state, and the end of the handle 22 away from the guide shaft 2 is higher than the end directly connected to the guide shaft 2. When the latch 3 is in the two extreme positions, based on the current embodiment of the slide slot 21, the two positions of the handle 22 are also 180 degrees apart. At the same time, based on the setting position and axial direction of the guide shaft 2, the latch 3 and its telescopic direction are perpendicular to the outer hinge 11, so that the latch 3 can enter and exit the latch hole on the outer hinge 11. Specifically:

[0029] When the latch 3 extends out of the guide shaft 2 to the maximum extent, the latch structure is in a locked state. Figure 6 and Figure 7 , the end of the latch 3 away from the slider 31 extends to the farther latch hole, and the latch 3 as a whole enters the empty space between the two latch holes and the inner hinge 12, locking the inner hinge 12 and the end frame in the vertical position;

[0030] When the latch 3 is retracted into the guide shaft 2 to the maximum extent, the latch structure is in the open state, see Figure 8 and Fig. 9 The end of the latch 3 away from the slider 31 is only in the closer latch hole, and the farther latch hole and the inner hinge 12 are not restricted by the latch 3, so that the inner hinge 12 and the end frame can be folded on the base frame 1.

[0031] In order to keep the bolt structure stable when the bolt structure is in the locked state, the bolt structure also includes a safety block 4. A bolt 42 is fixed at one end of the safety block 4, and a U-shaped groove 41 is provided at the other end. The direction of the U-shaped groove 41 is perpendicular to the axis of the bolt 42. The bolt 42 is movably connected to the support 5 and is perpendicular to the guide shaft 2 in space. In this embodiment, the bolt 42 is located directly below the axis of the guide shaft 2, that is, the end of the handle 22 away from the guide shaft 2 in the locked state protrudes downward from the guide shaft 2. Rotating the bolt 42 can drive the safety block 4 to rotate, so that the U-shaped groove 41 clamps the end of the handle 22, thereby limiting the rotation of the handle 22 and locking the bolt structure in the locked state.

[0032] In summary, the utility model improves the structure of the conventional latch 3 so that the telescopic action is completed inside the guide shaft 2, the overall structure occupies less space, and the end structure space of the folding box is saved; at the same time, the utility model is simpler to operate, and the latch 3 can be telescoped and locked or opened only by rotating the handle 22. After the latch structure is in the locked state, the bolt 3 can be locked only by rotating the bolt 42.

[0033] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A latch structure for a folding box, wherein four sets of hinge devices are arranged at both ends of a bottom frame (1) of the folding box, wherein the hinge devices include an inner hinge (12) and an outer hinge (11) which are pivotally connected, and the outer hinge (11) is provided with two latch holes; each set of the hinge devices is correspondingly provided with a set of latch structures, and the characteristics are as follows: The latch structure comprises a guide shaft (2), a latch (3) and a safety block (4); the guide shaft (2) is arranged at the end of the base frame (1) along the length direction and can rotate axially; the interior of the guide shaft (2) is hollow, and both ends are provided with axial limiting components, one of which is closed and provided with an operating component, and the other end is open; the latch (3) is arranged inside the guide shaft (2), and the operating component drives the guide shaft (2) to rotate so that the latch (3) can be extended and retracted relative to the guide shaft (2); When the latch (3) is extended out of the guide shaft (2) to the maximum extent, the latch structure is in a locked state, the latch (3) enters the two latch holes and locks the inner hinge (12), and the safety block (4) can be operated to limit the movement of the operating component; when the latch (3) is retracted into the guide shaft (2) to the maximum extent, the latch structure is in an open state, the latch (3) leaves at least one of the latch holes and releases the inner hinge (12).

2. The latch structure according to claim 1, characterized in that: The side wall of the guide shaft (2) is provided with a spiral slide groove (21), both ends of the slide groove (21) are closed, and the surface of the latch (3) is provided with a sliding block (31) that cooperates with the slide groove (21).

3. The latch structure according to claim 2, characterized in that: The latch structure is provided with two sets of mutually matching sliding grooves (21) and sliding blocks (31).

4. The latch structure according to claim 1, characterized in that: Both ends of the guide shaft (2) are provided with supports (5) for providing supporting force; the supports (5) are fixed to the base frame (1) and are provided with circular openings (52) for the guide shaft (2) to pass through.

5. The latch structure according to claim 4, characterized in that: The limiting component comprises blocking pieces (51) respectively arranged on opposite sides of the two supports (5), and the blocking pieces (51) limit the axial movement of the guide shaft (2).

6. The latch structure according to claim 4, characterized in that: A bolt (42) is fixed at one end of the safety block (4), and a U-shaped groove (41) is provided at the other end; the bolt (42) is movably connected to the support (5) and is vertical to the guide shaft (2) in space; when the latch structure is in a locked state, the bolt (42) can be rotated to restrict the operating member to the U-shaped groove (41).

7. The latch structure according to claim 1, characterized in that: The operating member is a handle (22), the overall length of the handle (22) is greater than the radius of the end of the guide shaft (2), one end of the handle (22) is fixed at the center of the end of the guide shaft (2), and the other end can be clamped and limited by the safety block (4).

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