Folding box locking device

Abstract

The utility model relates to the field of folding containers, in particular to a folding container locking device which comprises a locking piece and a leaf spring, the locking piece is arranged in an outer hinge and close to the edge, the middle of the locking piece is hinged to the outer hinge through a rotating shaft, and the rotating shaft is perpendicular to the outer hinge; one end of the leaf spring is fixed, and the opposite end is embedded into the lower end of the locking piece and applies outward acting force to the lower end of the locking piece in the length direction of the box body; the outer hinge is provided with a limiting structure for preventing the lower end of the locking piece from rotating outwards; in the pivoting process of the inner hinge from the folding position to the vertical position, outward acting force is applied to the upper end of the locking piece, and the acting force is larger than the acting force of the leaf spring. After the inner hinge is located at the vertical position, the upper end of the locking piece falls into the groove in the back side of the inner hinge and presses the end face of the groove so as to lock the inner hinge. According to the utility model, by utilizing the special combination of the leaf spring and the locking piece, only the inner hinge needs to be operated when the inner hinge is locked; when the inner hinge is unlocked, the inner hinge is operated by a foot and pushed at the same time, the operation is convenient, and the use efficiency is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of folding container, concretely is folding box locking device. BACKGROUND

[0002] The folding box is a kind of gantry container, which includes a bottom frame for carrying goods, and foldable end walls located at both ends of the bottom frame. When the folding box is in use, the end frame is usually erected for loading, and when the empty box is returned, the end frame is folded to reduce the height, and multiple folding boxes are folded and connected to form a container for transportation, thereby reducing the return transportation cost.

[0003] Although the existing patent has disclosed various hinge devices to achieve the locking of the end wall in the vertical position after the end wall of the folding box is pivoted from the folded position to the vertical position, in actual operation, the commonly used method is still to lock the end wall by using a latch, and the latch needs to be repositioned after being in place to prevent displacement. The current structure has many components, large assembly quantity and many operation steps. UTILITY MODEL CONTENT

[0004] The utility model aims to provide a folding box locking device to optimize the locking device structure of inner hinge, simplify the structure components and reduce the operation steps.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a folding box locking device for locking the inner hinge of the end portion of the folding box, the inner hinge is pivotally connected to the outer hinge fixed on the bottom frame of the folding box, the locking device comprises a locking piece and a leaf spring, the locking piece is arranged in the outer hinge and close to the edge, the middle part of the locking piece is hingedly connected to the outer hinge through a rotating shaft, and the rotating shaft is perpendicular to the outer hinge; one end of the leaf spring is fixed, and the opposite end is embedded in the lower end of the locking piece and applies an outward force along the length direction of the box body to the lower end of the locking piece; the outer hinge is provided with a limiting structure to prevent the lower end of the locking piece from rotating outward; during the pivoting process of the inner hinge from the folded position to the vertical position, an outward force is applied to the upper end of the locking piece, and the force is greater than the force of the leaf spring; after the inner hinge is in the vertical position, the upper end of the locking piece falls into the groove on the back side of the inner hinge and presses the end face of the groove to lock the inner hinge.

[0006] Preferably, the locking piece comprises an integrally formed locking block and a plate body, the locking block is transversely arranged on the upper end of the plate body, the locking block cooperates with the end face of the groove of the inner hinge, and the plate body is of variable cross-section structure, a circular hole is arranged in the middle part for the rotating shaft to pass through, and an insertion slot is arranged below for the leaf spring to be embedded.

[0007] Preferably, the lock block is in the shape of a combination of a cylindrical surface and a plane, the cylindrical surface being the part of the lock member directly contacting the inner hinge in pivoting, and the plane being the part of the lock member directly contacting the groove end surface of the inner hinge.

[0008] Preferably, the limiting structure is a lock block slot provided on the outer hinge, the lock block slot being located on the side of the outer hinge outward along the length direction of the box body, and the left and right sides of the lock block reaching into the lock block slot.

[0009] Preferably, a C-shaped reinforcing block is fixed in the lock block slot, and the two ends of the lock block directly fall into the inner side of the C-shaped reinforcing block.

[0010] Preferably, the structure from outside to inside at the slot entrance is large to small.

[0011] Preferably, the limiting structure is a baffle provided on the outer side of the outer hinge, the baffle being located on the side of the outer hinge outward along the length direction of the box body and corresponding to the lower end of the lock member.

[0012] Compared with the prior art, the utility model has the beneficial effects that: the special combination of the leaf spring and the lock member makes it only need to operate the inner hinge when locking the inner hinge, and when unlocking the inner hinge, the inner hinge can be pushed by the foot operation, so that the operation is convenient and the use efficiency is high. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a structure schematic view when the utility model embodiment locks the inner hinge;

[0014] Figure 2 is Figure 1 a structure schematic view with one outer hinge plate removed in the utility model embodiment;

[0015] Figure 3 is Figure 2 left view;

[0016] Figure 4 is a side view when the utility model embodiment unlocks the inner hinge;

[0017] Figure 5 is a structure schematic view of the lock member in the utility model embodiment;

[0018] BRIEF DESCRIPTION OF DRAWINGS: 1-inner hinge, 2-outer hinge, 3-lock member, 31-lock block, 32-plate body, 33-round hole, 34-slot, 4-leaf spring, 5-C-shaped reinforcing block, 6-rotating shaft, 7-baffle, 8-leaf spring fixing block, 9-bottom corner piece. DETAILED DESCRIPTION

[0019] The utility model discloses a folding box locking device for locking the inner hinge 1 of folding box end, the inner hinge 1 is pivoted to the outer hinge 2, and the inner hinge 1 can be pivoted between the folding position and vertical position relative to the outer hinge 2. The outer hinge 2 comprises two parallel outer hinge plates, and the lower part of the outer hinge plate is fixed on the bottom corner piece 9 and the bottom frame of the folding box. The back side of the inner hinge 1 has a groove, and the back side refers to the side of the inner hinge 1 outward along the length direction of the box body when the inner hinge 1 is in the vertical position.

[0020] The locking device comprises a locking piece 3 and a leaf spring 4, and the locking piece 3 is arranged in the outer hinge 2 and close to the edge. Figures 1 to 4 The middle part of the locking piece 3 is hinged to the outer hinge 2 through a rotating shaft 6, and the rotating shaft 6 is perpendicular to the outer hinge 2. Specifically, the locking piece 3 comprises an integral locking block 31 and a plate body 32, and the plate body 32 is provided with a rotating shaft hole 32a. Figure 5 .

[0021] The locking block 31 is horizontally arranged on the upper end of the plate body 32, and the locking block 31 is matched with the groove end face of the inner hinge 1. The locking block 31 is in the shape of a combination of a cylindrical surface and a plane, the cylindrical surface is the part of the locking piece 3 directly contacting the inner hinge 1 in pivoting, and one plane is the part of the locking piece 3 directly contacting the groove end face of the inner hinge 1. The cylindrical surface can reduce the abrasion when the inner hinge 1 collides with the locking piece 3, and the bottom plane can better match the groove end face, thereby improving the locking effect.

[0022] The plate body 32 is in a variable cross-section structure, and a circular hole 33 is arranged in the middle part of the plate body 32 for the rotating shaft 6 to pass through. The locking block 31, the plate body 32 and the locking piece 3 can rotate around the rotating shaft 6 in the length direction of the box body. The plate body 32 is provided with a slot 34 at the lower part for the leaf spring 4 to be embedded, and the slot 34 is in a structure of gradually decreasing from outside to inside at the entrance, so as to provide the space for the bending and movement of the leaf spring 4 in the rotating process of the locking piece 3. The plate body 32 in the variable cross-section structure can meet the strength requirement while reducing the weight of the locking piece 3 and saving materials.

[0023] One end of the leaf spring 4 is fixed on the bottom corner piece 9 through a leaf spring fixing block 8, and the opposite end is embedded in the slot 34 at the lower end of the locking piece 3 and applies an outward force along the length direction of the box body to the lower end of the locking piece 3. The leaf spring 4 in the embodiment is curved or bent in the normal state, and one end of the leaf spring 4 is fixed and the other end is embedded in the lower end of the locking piece 3 in the structure, so that the leaf spring 4 is nearly straight, and the leaf spring 4 can feed back the outward force to the lower end of the locking piece 3.

[0024] The outer hinge 2 is provided with a limiting structure for preventing the lower end of the locking member 3 from rotating outwardly, and two limiting structures are used in this embodiment, namely a locking block slot formed on the outer hinge 2 and a baffle 7 arranged on the outer side of the outer hinge 2. The locking block slot is located on the side of the outer hinge 2 along the length direction of the box body and outwardly, and the left and right sides of the locking block 31 reach into the locking block slot. A C-shaped reinforcing block 5 is fixed in the locking block slot, and the two ends of the locking block 31 directly fall into the inner side of the C-shaped reinforcing block 5. The C-shaped reinforcing block 5 can further enhance the force bearing structure between the locking block 31 and the outer hinge plate, and improve the strength of the whole hinge device.

[0025] The leaf spring 4, the baffle 7 and the C-shaped reinforcing block 5 position the locking member 3 at the default position, referring to Figures 1 to 3 At this time, the plate body 32 is close to the baffle 7, and the locking block 31 falls into the C-shaped reinforcing block 5. In the process of rotating the inner hinge 1 from the folding position to the vertical position, the inner hinge 1 will first contact the locking block 31 at the upper end of the locking member 3, and the self weight of the inner hinge 1 and the inner corner column thereon is used to apply an outward force to the locking block 31, which is greater than the force of the leaf spring 4, so as to push the locking block 31 to rotate outwardly and rotate the whole locking member 3. When the inner hinge 1 is in the vertical position, the locking member 3 is rotated back and reset to the default position under the action of the leaf spring 4, and at the same time falls into the recess on the back side of the inner hinge 1 and the limiting block of the outer hinge 2. At this time, the bottom plane of the locking block 31 is close to the end face of the recess, which plays a role in locking the inner hinge 1.

[0026] When it is needed to rotate the inner hinge 1 from the vertical position to the folding position, only the lower end of the locking member 3 needs to be pushed, and the force greater than the force of the leaf spring 4 is applied to the lower end of the locking member 3, so as to rotate the locking member 3 around the rotating shaft 6, so as to make the locking block 31 at the upper end separate from the inner hinge 1, referring to Figure 4 In actual operation, the staff can operate with the foot, referring to Figure 4 the arrow direction in the figure, so as to achieve the effect of unlocking the inner hinge 1, and after unlocking, the inner hinge 1 is pushed, so that the inner hinge 1 and the inner corner column thereon reach the folding position.

[0027] In the whole operation process, the inner hinge 1 is rotated from the folding position to the vertical position, and only the inner hinge 1 needs to be operated, without the need of operating the locking device; the inner hinge 1 is rotated from the vertical position to the folding position, and the foot can be used for operation, and at the same time the inner hinge 1 is pushed, so that the operation is convenient.

[0028] In summary, the special combination of the leaf spring and the locking member makes the locking and unlocking operation of the inner hinge simple and fast, and improves the use efficiency.

[0029] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A folding box locking device for locking an inner hinge (1) of an end portion of a folding box, said inner hinge (1) being pivotally connected to an outer hinge (2) fixed to a chassis of the folding box, characterized in that: The locking device comprises a locking piece (3) and a leaf spring (4), the locking piece (3) is arranged in the outer hinge (2) and close to the edge, the middle part of the locking piece (3) is hinged to the outer hinge (2) through a rotating shaft (6), the rotating shaft (6) is perpendicular to the outer hinge (2); one end of the leaf spring (4) is fixed, the opposite end is embedded in the lower end of the locking piece (3), and an outward force along the length direction of the box body is applied to the lower end of the locking piece (3); the outer hinge (2) is provided with a limiting structure to prevent the lower end of the locking piece (3) from rotating outward; during the pivoting of the inner hinge (1) from the folded position to the vertical position, an outward force is applied to the upper end of the locking piece (3), and the force is greater than the force of the leaf spring (4); after the inner hinge (1) is in the vertical position, the upper end of the locking piece (3) falls into the groove on the back side of the inner hinge (1) and presses the end face of the groove to lock the inner hinge (1).

2. The folding box locking device according to claim 1, characterized in that: The locking piece (3) comprises an integral locking block (31) and a plate body (32), the locking block (31) is transversely arranged on the upper end of the plate body (32), the locking block (31) cooperates with the groove end face of the inner hinge (1), and the plate body (32) is a variable cross-section structure, a circular hole (33) is arranged in the middle part for the rotating shaft (6) to pass through, and an insertion slot (34) is arranged below for the leaf spring (4) to be embedded.

3. The folding box locking device according to claim 2, characterized in that: The locking block (31) is combined with a cylindrical surface and a plane, the cylindrical surface is the part of the locking piece (3) that directly contacts the inner hinge (1) during pivoting, and one plane is the part of the locking piece (3) that directly contacts the groove end face of the inner hinge (1).

4. The folding box locking device according to claim 2 or 3, characterized in that: The limiting structure is a locking block slot arranged on the outer hinge (2), the locking block slot is located on the side of the outer hinge (2) outward along the length direction of the box body, and the left and right sides of the locking block (31) reach into the locking block slot.

5. The folding box locking device according to claim 4, characterized in that: A C-shaped reinforcing block (5) is fixed in the locking block slot, and the two ends of the locking block (31) directly fall into the inner side of the C-shaped reinforcing block (5).

6. The folding box locking device according to claim 2, characterized in that: The insertion slot (34) is gradually reduced from outside to inside at the entrance.

7. The folding box locking device according to claim 1, characterized in that: The limiting structure is a baffle (7) arranged on the outer side of the outer hinge (2), the baffle (7) is located on the side of the outer hinge (2) outward along the length direction of the box body and corresponds to the lower end of the locking piece (3).

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