A folding box top board fixing device

Abstract

The utility model relates to the field of container, concretely is a kind of folding box roof fixing device, including shell, knob, limit pressing plate and limit block, shell is fixed in the top side beam of folding box, inside is provided with transmission mechanism;Knob and limit pressing plate are set to shell outside, respectively the operating end and result end of transmission mechanism, transmission mechanism satisfies the rotation knob can one-way control the lifting of limit pressing plate, and make limit pressing plate exist horizontal highest position and horizontal lowest position;Limit block is fixed to roof, and upper portion is provided with protrusion, limit pressing plate one end horizontal rotation is connected in transmission structure, other end below is provided with the recess that matching protrusion;Limit pressing plate can rotate when in horizontal highest position, can press down limit block and be inlayed with it when descending to horizontal lowest position, to fix roof and top side beam.The utility model is closely fixed with side plate between the interaction between limit pressing plate and limit block, avoid the movement and gap change between roof and side plate.

Description

Technical Field

[0001] This utility model relates to the field of containers, specifically a folding container top plate fixing device. Background Technology

[0002] Foldable containers are an innovative logistics transportation device with significant features and broad application prospects. In this type of container, major components such as the top, side walls, and doors can be easily folded or disassembled, and these components can be easily reassembled to restore the container's complete form for reuse. The folded volume is only one-fifth or even smaller than that of a regular container, greatly reducing space requirements and providing high flexibility in transportation and storage, offering users significant convenience.

[0003] In the aforementioned folding container, the connection, sealing, and fixing between the various components are the most pressing issues to be addressed. No fixing device between the separate top plate and the top side beam has been found in existing patents. Utility Model Content

[0004] The purpose of this utility model is to provide a folding container top plate fixing device to solve the problem of fixing the top plate and side plate of the folding container and enhance the stability of the overall structure.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a top plate fixing device for a folding box, comprising a housing, a knob, a limiting pressure plate, and a limiting block. The housing is fixed to the top side beam of the folding box and has a transmission mechanism inside. The knob and the limiting pressure plate are located on the outside of the housing, serving as the operating end and the output end of the transmission mechanism, respectively. The transmission mechanism allows the knob to be rotated to unidirectionally control the lifting and lowering of the limiting pressure plate, enabling the limiting pressure plate to have a highest horizontal position and a lowest horizontal position. The limiting block is fixed to the top plate and has a protrusion on its upper surface. One end of the limiting pressure plate is horizontally rotatably connected to the transmission structure, and the other end has a groove matching the protrusion below it. The limiting pressure plate can rotate when it is at its highest horizontal position and can press down on and engage with the limiting block when it descends to its lowest horizontal position, thereby fixing the top plate and the top side beam.

[0006] Preferably, the transmission mechanism includes a worm gear transmission mechanism, a gear and rack transmission mechanism, and a connecting round bar. The worm is placed vertically and passes through the housing, and the knob is coaxially fixed to the top of the worm. The gear and the worm gear are coaxially fixed. The connecting round bar is vertically fixed above the rack and passes through the housing. A pressure block is coaxially fixed to the top of the connecting round bar. The limiting pressure plate is sleeved on the connecting round bar and is axially limited to below the pressure block.

[0007] Preferably, the limiting pressure plate is in the shape of a right-angled Z, including two horizontal panels with a height difference, the lower horizontal panel end is sleeved on the connecting round bar, and the groove is provided below the higher horizontal panel end; the pressure block is cylindrical.

[0008] Preferably, the upper surface of the housing is provided with an annular boss, and a compression spring and a compression spring cover plate are also sleeved on the connecting round rod. The compression spring cover plate is located below the limiting pressure plate, and one end of the compression spring abuts against the compression spring cover plate and the other end abuts against the annular boss.

[0009] Preferably, the protrusion is I-shaped, including protrusions on both sides and a central stiffener, the stiffener being parallel to the top side beam, and the groove having the same shape as the stiffener; the rotation axis of the limiting pressure plate is located within the vertical plane of the stiffener, the vertical plane passing through the center of the stiffener and perpendicular to the horizontal plane.

[0010] Preferably, there is a height difference between the two protrusions; when the limiting pressure plate is in the highest horizontal position, the horizontal height of the lower surface of the end where the groove is located is higher than the upper surface of the protrusion with the lower protrusion height.

[0011] Preferably, a protective plate is provided on the bottom inner side of the housing, and the protective plate surrounds the rack on three sides.

[0012] Preferably, the upper surface of the housing is provided with two limiting protrusions, which are symmetrically arranged along the rotation trajectory of the limiting pressure plate and respectively contact the limiting pressure plate to form a bidirectional angular constraint; when the limiting pressure plate contacts one of the limiting protrusions, the groove is located above the limiting block; when the limiting pressure plate contacts the other limiting protrusion, the groove is located above the top side beam.

[0013] Preferably, the upper surface of the housing is provided with two locking protrusions. The protrusion height of the locking protrusions is lower than that of the limiting protrusion. Both locking protrusions are close to the rotating connection end of the limiting pressure plate. The rotating connection end of the limiting pressure plate is provided with a downward-facing slot. The shape of the slot matches the locking protrusion. After the limiting pressure plate contacts either of the limiting protrusions and falls down, one of the locking protrusions is inserted into the slot to fix the limiting pressure plate in the horizontal direction.

[0014] Preferably, the top plate has channel steel on both sides, a sealing strip is provided on the inner side of the channel steel, the flat strip of the top side beam is inserted into the channel steel, a plurality of limiting blocks are fixed at equal intervals on the upper side of the channel steel, and the same number of limiting pressure plates are correspondingly provided on the top side beam.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This utility model uses the interaction between the limiting pressure plate and the limiting block to firmly fix the top plate and the side plate, preventing the top plate and the side plate from moving around and the gap from changing.

[0017] This invention increases the downward pressure area of ​​the connecting round bar on the limiting pressure plate by using a pressure block, thereby relieving the end pressure of the limiting pressure plate, enhancing the stability of the structure, and extending the service life of the component; at the same time, because the limiting pressure plate is bent, the circular structure will not affect the rotation of the limiting pressure plate.

[0018] The compression spring of this utility model can ensure that the upper surface of the limiting pressure plate is always in close contact with the lower surface of the pressure block, and ensure that the limiting pressure plate will move in the same way as the pressure block moves up and down.

[0019] The fixing device of this utility model, together with the sealing strip inside the channel steel, enables a certain degree of sealing between the top plate and the top side beam. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of one embodiment of the present invention (infinite bit block);

[0021] Figure 2 This is a schematic diagram of another state structure (infinite bit block) of one embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the application of this utility model to the top slab and top side beam;

[0023] Figure 4 yes Figure 3 Enlarged schematic diagram of section A, structural schematic diagram of the limiting pressure plate in use;

[0024] Figure 5 yes Figure 3 Enlarged schematic diagram of section B, structural schematic diagram of the limiting pressure plate in a non-use state;

[0025] Figure 6 yes Figure 3 Top view;

[0026] Figure 7 yes Figure 6 CC section view;

[0027] Figure 8 This is a schematic diagram of the internal transmission structure of the housing of this utility model;

[0028] Figure 9 yes Figure 1 Side view;

[0029] Figure 10 yes Figure 9 DD section view;

[0030] Figure 11 This is a schematic diagram of the upper part of the shell of this utility model. Detailed Implementation

[0031] Please see Figure 1 and Figure 2 This utility model discloses a top plate fixing device for a folding box, including a housing 1, a knob 2, a limiting pressure plate 3, and a limiting block 4. The housing 1 is fixed to the top side beam 7 of the folding box, and the top side beam 7 is the top structure of the side plate of the folding box. A transmission mechanism is provided inside the housing 1. The knob 2 and the limiting pressure plate 3 are located on the outside of the housing 1, and are the operating end and the output end of the transmission mechanism, respectively. The transmission mechanism allows the knob 2 to control the lifting and lowering of the limiting pressure plate 3 in one direction, and allows the limiting pressure plate 3 to have a highest horizontal position and a lowest horizontal position. The limiting block 4 is fixed to the top plate and has a protrusion on its top. One end of the limiting pressure plate 3 is horizontally rotatably connected to the transmission structure, and the other end has a groove 31 matching the protrusion below it. The limiting pressure plate 3 can rotate when it is in the highest horizontal position, and when it descends to the lowest horizontal position, it can press down on the limiting block 4 and engage with it to fix the top plate and the top side beam 7.

[0032] See Figures 3 to 7 The top plate has channel steel 61 on both sides, with sealing strips 62 installed on the inner side of the channel steel 61. The flat strips of the top side beam 7 are inserted into the channel steel 61. Multiple limiting blocks 4 are fixed at equal intervals on the upper side of the channel steel 61, and the same number of limiting pressure plates 3 are correspondingly installed on the top side beam 7. The sealing strips 62 are pasted on the inner side of the channel steel 61 and interlock with the flat strips on the top side beam 7 to achieve a sealing effect. Multiple fixing devices are used on both sides of the top plate to achieve the fixing and sealing of the top and side plates of the folding box.

[0033] The specific structure of the fixing device is as follows:

[0034] See Figures 8 to 10 The transmission mechanism includes a worm gear transmission mechanism, a rack and pinion transmission mechanism, and a connecting round bar 55. The worm gear transmission mechanism includes a meshing worm gear 51 and a worm 52. The worm 52 is placed vertically and passes through the housing 1. A knob 2 is coaxially fixed to the top of the worm 52, and the worm 52 and the knob 2 rotate synchronously. The knob 2 has a square structure and serves as the operating end of the entire transmission mechanism. It can be rotated by a machine or tool, and its square structure allows for easy control and judgment of the rotation angle.

[0035] The gear and rack transmission mechanism includes a meshing gear 53 and a rack 54. The gear 53 and the worm gear 51 are coaxially fixed. A protective plate 11 is provided on the bottom inner side of the housing 1, which surrounds the rack 54 on three sides to prevent the rack 54 from swinging and affecting the transmission of the worm gear 51 and worm 52. A connecting round rod 55 is vertically fixed above the rack 54 and passes through the housing 1. A pressure block 56 is coaxially fixed to the top of the connecting round rod 55. The pressure block 56 is cylindrical.

[0036] The limiting pressure plate 3 is sleeved on the connecting round bar 55 and axially limited below the pressure block 56. Specifically, the limiting pressure plate 3 is in the shape of a right-angled Z, including two horizontal panels with a height difference. The lower horizontal panel is sleeved on the connecting round bar 55, and a groove 31 is provided below the upper horizontal panel. This solves the problem that the straight plate type limiting pressure plate 3 cannot achieve the fixing function due to the height difference between the upper surface of the top plate and the upper surface of the shell 1. At the same time, the use of the cylindrical pressure block 56 can minimize the amount of material used and ensure that it does not affect the rotation of the limiting pressure plate 3 in the horizontal plane.

[0037] The axial limiting method of the limiting pressure plate 3 is as follows: an annular boss 12 is provided on the upper surface of the housing 1, and a compression spring 57 and a compression spring cover plate 58 are also sleeved on the connecting round rod 55. The compression spring cover plate 58 is located below the limiting pressure plate 3, and one end of the compression spring 57 abuts against the compression spring cover plate 58, while the other end abuts against the annular boss 12. (See reference...) Figure 10 The compression spring 57 ensures that the upper surface of the limiting pressure plate 3 remains in close contact with the lower surface of the pressure block 56, guaranteeing that the limiting pressure plate 3 will move in the same direction as the pressure block 56. The pressure block 56 also increases the downward pressure area of ​​the connecting round rod 55 on the limiting pressure plate 3 to a certain extent, which can alleviate the end pressure of the limiting pressure plate 3, enhance the stability of the structure, and extend the service life of the component.

[0038] The limiting pressure plate 3, as the final end of the entire transmission mechanism, receives force from the machine's rotating knob 2. The force transmission begins at knob 2, passing sequentially through the worm gear 52, worm wheel 51, gear 53, rack 54, and connecting rod 55, ending at the limiting pressure plate 3 and the pressure block 56. Depending on actual needs, by rotating knob 2 within a certain angle, the limiting pressure plate 3 can achieve linear displacement along the axis of the connecting rod 55. Furthermore, because the rotation angle of knob 2 can be controlled, the limiting pressure plate 3 can have both a highest and lowest horizontal position during displacement. When the limiting pressure plate 3 is in its highest horizontal position, it can be moved using a machine or tool, allowing it to rotate freely within that horizontal plane.

[0039] Meanwhile, based on the static locking principle of the worm gear transmission mechanism, when the lead angle of the worm 52 is less than the friction angle of the meshing pair material, the system will generate a self-locking effect; this self-locking torque is transmitted to the gear and rack transmission mechanism and the pressure block 56 through the axial transmission chain of the worm 51, so that the operation knob 2 can control the lifting and lowering of the limit pressure plate 3 in one direction.

[0040] The protrusion on limit block 4 is I-shaped, see reference. Figure 5The top plate and top side beam 7 are both bosses on both sides and a central stiffener 42. The stiffener 42 is parallel to the top side beam 7, and the shape of the groove 31 is consistent with the stiffener 42. The rotation axis of the limiting pressure plate 3, which is the axis connecting the round bar 55, is located in the vertical plane of the stiffener 42. This vertical plane passes through the center of the stiffener 42 and is perpendicular to the horizontal plane. Through the relative position design of the limiting pressure plate 3 and the limiting block 4, the limiting pressure plate 3 can rotate so that the groove 31 rotates to be directly above the limiting block 4 during rotation, so that after falling, the limiting pressure plate 3 and the limiting block 4 fit together to fix the top plate and the top side beam 7.

[0041] The two protrusions have different heights. The protrusion with the lower height is the first protrusion 41, and the protrusion with the higher height is the second protrusion 43. The upper surface of the second protrusion 43 and the rib plate 42 are at the same horizontal level. When the limiting pressure plate 3 is at its highest horizontal position, the lower surface of the end where the groove 31 is located is higher than the upper surface of the first protrusion 41. During the rotation of the limiting pressure plate 3, the lower height of the first protrusion 41 ensures that the limiting pressure plate 3 passes through the first protrusion 41 without obstruction and rotates normally to directly above the limiting block 4. Then, the knob 2 is operated to control its descent to press against the limiting block 4. The two engage, the rib plate 42 enters the groove 31, and the lower surface of the limiting pressure plate 3 is located between the two protrusions, ensuring that the top plate and the top side beam 7 do not move relative to each other.

[0042] Combination Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 11 The upper surface of the housing 1 is provided with two limiting protrusions: a first limiting protrusion 13 and a second limiting protrusion 14. The two limiting protrusions are symmetrically arranged along the rotation trajectory of the limiting pressure plate 3. The first limiting protrusion 13 is closer to the top plate than the second limiting protrusion 14. Both protrusions contact the limiting pressure plate 3 to form a bidirectional angular constraint, thus limiting the rotation range of the limiting pressure plate 3 to within a 90° angle. That is, when the limiting pressure plate 3 contacts the first limiting protrusion 13 and the second limiting protrusion 14, the axes of symmetry of the limiting pressure plate 3 differ by 90°. When the limiting pressure plate 3 contacts the first limiting protrusion 13, the groove 31 is located above the limiting block 4; when the limiting pressure plate 3 contacts the second limiting protrusion 14, the groove 31 is located above the top side beam 7. The upper surface of the housing 1 is provided with two locking protrusions: a first locking protrusion 15 and a second locking protrusion 16. The protrusion height of the locking protrusion is lower than that of the limiting protrusion. Both locking protrusions are close to the rotating connection end of the limiting pressure plate 3. The rotating connection end of the limiting pressure plate 3, i.e. the lower horizontal panel end, is provided with a downward-facing slot 32. The shape of the slot 32 matches the locking protrusion.

[0043] After the limiting pressure plate 3 contacts and falls with any of the limiting protrusions, a locking protrusion inserts into the slot 32 to fix the limiting pressure plate 3 in the horizontal direction. Through the above structure, the limiting pressure plate 3 can exist in the following two states: In use state—after the limiting pressure plate 3 contacts and falls with the first limiting protrusion 13, the first locking protrusion 15 inserts into the slot 32. At this time, the limiting pressure plate 3 presses down on the limiting block 4, fixing the top plate and the top side beam 7. (See reference...) Figure 4 In non-use state—after the limiting pressure plate 3 contacts and falls with the second limiting protrusion 14, the second locking protrusion 16 inserts into the slot 32. At this time, the limiting pressure plate 3 is entirely above the top side beam 7 and is restricted to remain stationary relative to the top side beam 7. (See reference...) Figure 5 This ensures that the transportation of the top side beam 7 and the side plate will not be hindered, and that the top plate will not be touched due to random rotation when connecting the top plate and the top side beam 7.

[0044] The working principle of this utility model:

[0045] When fixing the top plate and side plate: First, ensure that the limiting pressure plate 3 is in a non-use state, and insert the flat strip of the top side beam 7 into the channel steel 61 on both sides of the top plate; then use a machine or tool to turn the knob 2 to raise the limiting pressure plate 3. When the limiting pressure plate 3 reaches the highest horizontal position, move the limiting pressure plate 3 to contact the first limiting protrusion 13 and the higher protrusion on the limiting block 4. Turn the knob 2 to lower the limiting pressure plate 3 until it presses against the limiting block 4 and is in the use state.

[0046] When releasing the fixation: rotate knob 2 to raise the limit plate 3 to its highest horizontal position, move the limit plate 3 to contact the second limit protrusion 14, rotate knob 2 to lower the limit plate 3, so that the limit plate 3 is in a non-use state.

[0047] In summary, this utility model forms a rigid constraint on the gap between the limiting pressure plate and the limiting block through the entire transmission mechanism, which can effectively suppress the time-varying phenomenon of the fitting gap caused by dynamic loads such as transportation vibration and inertial impact. That is, through the interaction between the limiting pressure plate and the limiting block, the top plate and the side plate are tightly fixed, avoiding the movement and gap changes between the top plate and the side plate.

[0048] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A folding box top plate fixing device, characterized in that: The device includes a housing (1), a knob (2), a limiting plate (3), and a limiting block (4). The housing (1) is fixed to the top side beam (7) of the folding box and has a transmission mechanism inside. The knob (2) and the limiting plate (3) are located on the outside of the housing (1) and are the operating end and the result end of the transmission mechanism, respectively. The transmission mechanism allows the knob (2) to be rotated to control the lifting and lowering of the limiting plate (3) in one direction, and the limiting plate (3) has a highest horizontal position and a lowest horizontal position. The limiting block (4) is fixed to the top plate and has a protrusion on its top. One end of the limiting plate (3) is horizontally rotatably connected to the transmission structure, and the other end has a groove (31) matching the protrusion below it. The limiting plate (3) can rotate when it is at the highest horizontal position and can press down on the limiting block (4) and engage with it when it is lowered to the lowest horizontal position to fix the top plate and the top side beam (7).

2. The fixing device according to claim 1, characterized in that: The transmission mechanism includes a worm gear transmission mechanism, a gear and rack transmission mechanism, and a connecting round bar (55). The worm (52) is placed vertically and passes through the housing (1). The knob (2) is coaxially fixed to the top of the worm (52). The gear (53) and the worm gear (51) are coaxially fixed. The connecting round bar (55) is vertically fixed above the rack (54) and passes through the housing (1). The pressure block (56) is coaxially fixed to the top of the connecting round bar (55). The limiting pressure plate (3) is sleeved on the connecting round bar (55) and is axially limited to the bottom of the pressure block (56).

3. The fixing device according to claim 2, characterized in that: The limiting pressure plate (3) is in the shape of a right angle Z and includes two horizontal panels with a height difference. The lower horizontal panel is fitted onto the connecting round rod (55) at its end, and the groove (31) is provided below the higher horizontal panel at its end. The pressure block (56) is cylindrical.

4. The fixing device according to claim 2, characterized in that: The upper surface of the housing (1) is provided with an annular boss (12). The connecting round rod (55) is also fitted with a compression spring (57) and a compression spring cover plate (58). The compression spring cover plate (58) is located below the limiting pressure plate (3). One end of the compression spring (57) abuts against the compression spring cover plate (58), and the other end abuts against the annular boss (12).

5. The fixing device according to claim 1, characterized in that: The protrusion is I-shaped, including protrusions on both sides and a central stiffener (42). The stiffener (42) is parallel to the top side beam (7). The shape of the groove (31) is consistent with that of the stiffener (42). The rotation axis of the limiting pressure plate (3) is located in the vertical plane of the stiffener (42). The vertical plane passes through the center of the stiffener (42) and is perpendicular to the horizontal plane.

6. The fixing device according to claim 5, characterized in that: There is a height difference between the two protrusions; when the limiting pressure plate (3) is in the highest horizontal position, the horizontal height of the lower surface of the end where the groove (31) is located is higher than the upper surface of the protrusion with the lower protrusion height.

7. The fixing device according to claim 1, characterized in that: The inner bottom of the housing (1) is provided with a protective plate (11) which surrounds the rack (54) on three sides.

8. The fixing device according to claim 1, characterized in that: The upper surface of the housing (1) is provided with two limiting protrusions. The two limiting protrusions are symmetrically arranged along the rotation trajectory of the limiting pressure plate (3) and respectively contact the limiting pressure plate (3) to form a bidirectional angular constraint. When the limiting pressure plate (3) contacts one of the limiting protrusions, the groove (31) is located above the limiting block (4). When the limiting pressure plate (3) contacts the other limiting protrusion, the groove (31) is located above the top side beam (7).

9. The fixing device according to claim 8, characterized in that: The upper surface of the housing (1) is provided with two locking protrusions. The protrusion height of the locking protrusions is lower than that of the limiting protrusion. Both locking protrusions are close to the rotating connection end of the limiting pressure plate (3). The rotating connection end of the limiting pressure plate (3) is provided with a downward-facing slot (32). The shape of the slot (32) matches the locking protrusion. After the limiting pressure plate (3) contacts and falls with any of the limiting protrusions, one of the locking protrusions is inserted into the slot (32) to fix the limiting pressure plate (3) in the horizontal direction.

10. The fixing device according to claim 1, characterized in that: The top plate has channel steel (61) on both sides, and a sealing strip (62) is provided on the inner side of the channel steel (61). The flat strip of the top side beam (7) is inserted into the channel steel (61). Multiple limiting blocks (4) are fixed at equal intervals on the upper side of the channel steel (61), and the same number of limiting pressure plates (3) are provided on the top side beam (7).

Images