Unhooking prevention device suitable for joist barrow lifting hook

Abstract

The utility model belongs to the technical field of hoisting, and particularly relates to an anti-unhooking device suitable for a joist barrow lifting hook. The utility model provides an anti-unhooking device suitable for a joist barrow lifting hook, which comprises an anti-unhooking unit which is rotatably arranged on the lifting hook and is used for opening and closing an opening of the lifting hook, and a positioning unit which is arranged on the lifting hook and is used for enabling the anti-unhooking unit to keep the opening of the lifting hook closed, the two connecting sections are arranged at the two ends of the connecting shaft, the two ends of the blocking section are connected with the two connecting sections respectively, the blocking section is located on the inner side of the hook body of the lifting hook, and the manual rotating section is arranged at the end, away from the blocking section, of the connecting section and located on the outer side of the hook body of the lifting hook. And the lifting hook can be kept stable in an open state and a closed state, so that the safety problems of hand clamping and the like in the operation process are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of hoisting, and in particular relates to an anti-unhooking device suitable for a gantry crane hook. Background Art

[0002] The hook is often used as the corresponding lifting device of the gantry crane, and generally needs to be installed with an anti-unhooking device to prevent unhooking accidents during the lifting process. The existing anti-unhooking devices of hooks are mostly in the form of spring reset. On the one hand, the process of removing the suspended object from the hook is not very convenient, and the suspended object can only be removed under the premise of keeping the anti-unhooking device open and removing obstacles; on the other hand, when the operation of placing and removing the suspended object is relatively frequent, the spring reset structure is easily damaged, resulting in the failure of the anti-unhooking device, causing safety hazards.

[0003] A Chinese utility model patent with patent publication number CN 220845112 U and publication date April 26, 2024, discloses an anti-unhooking device, which includes a hook body. Its structural feature is that an anti-unhooking frame composed of a plurality of scrap steel materials is rotatably installed on the hook body, and the anti-unhooking frame includes an anti-unhooking frame and an adjusting frame connected at an angle, the anti-unhooking frame and the adjusting frame are both arranged around the hook body, and a positioning seat rotatably installed on the hook body is provided at the connection between the anti-unhooking frame and the adjusting frame, the anti-unhooking frame extends downwardly and obliquely from the positioning seat to the relatively inner side of the hook body, the highest point of the anti-unhooking frame rotating upward is the position where the anti-unhooking frame abuts against the inner side of the hook body, the adjusting frame extends from the positioning seat to the relatively outer side of the hook body, and the adjusting frame is heavier than the adjusting frame of the anti-unhooking frame.

[0004] The anti-unhooking device in the Chinese utility model patent has the following general usage and advantages: the anti-unhooking frame is arranged around the hook body to ensure the anti-unhooking function of the anti-unhooking frame and facilitate subsequent adjustment; the positioning seat can provide connection support and rotation support for the anti-unhooking frame; under the action of gravity, the adjustment frame can press down to drive the anti-unhooking frame to lean against the inner side of the hook body, thereby realizing the anti-unhooking function of the anti-unhooking frame and avoiding the use of a spring to drive the anti-unhooking block to achieve anti-unhooking, thereby reducing the failure rate of the anti-unhooking device; when the operator removes the rigging, he pushes the adjustment frame upwards; because the adjustment frame is outside the hook body, the operator is less likely to be squeezed and damaged by the rigging and the hook body, thereby avoiding safety hazards; the anti-unhooking device has high safety and durability, and has a simple structure and is easy and quick to install.

[0005] However, during actual use, the anti-unhooking device still has at least the following shortcomings, in other words, the technical problems to be solved by the present invention: during actual operation, the anti-unhooking device requires one hand to keep the anti-unhooking frame stable in position, and the other hand to hang the suspended object into the hook. It is very easy for the anti-unhooking frame to squeeze the human hand during operation, posing a great safety hazard.

[0006] Therefore, in summary, a safer anti-unhooking device is urgently needed to solve the problem of this type of problem. Utility Model Content

[0007] The utility model provides an anti-unhooking device suitable for a crane hook of a gantry crane, comprising an anti-unhooking unit rotatably mounted on the crane hook for opening and closing a crane hook opening, and a positioning unit mounted on the crane hook for enabling the anti-unhooking unit to keep the crane hook opening closed. The anti-unhooking unit comprises a connecting shaft hinged on the crane hook, two connecting sections arranged at both ends of the connecting shaft, blocking sections at both ends respectively connected to the two connecting sections and located on the inner side of a crane hook body, and a manual rotating section arranged at the end of the connecting section away from the blocking section and located on the outer side of the crane hook body, so that: the utility model realizes the opening and closing of the crane hook through a simple and easy-to-operate structure, and enables the crane hook to remain stable in both the open / closed states, thereby avoiding safety problems such as pinching of the hand during operation.

[0008] The technical solution adopted by the utility model to solve the above-mentioned problem is: an anti-unhooking device suitable for a crane hook comprises an anti-unhooking unit hingedly mounted on the hook and used for opening and closing the hook opening, and a positioning unit arranged on the hook and enabling the anti-unhooking unit to keep closing the hook opening; the anti-unhooking unit comprises a connecting shaft A hingedly mounted on the hook, two connecting sections respectively arranged at both ends of the connecting shaft A, blocking sections respectively connected to the two connecting sections at both ends and located on the inner side of the hook body, and a manual rotating section arranged on the connecting section away from the end of the blocking section and located on the outer side of the hook body.

[0009] A further preferred technical solution is that the positioning unit includes a torsion spring arranged at the hinge between the connecting shaft A and the hook.

[0010] A further preferred technical solution is that the positioning unit includes a magnet A installed on the inner side of the hook opening.

[0011] A further preferred technical solution is that the positioning unit also includes a connecting seat which is detachably connected to the hook and is used to install the magnet A.

[0012] A further preferred technical solution is that the anti-unhooking device also includes a temporary locking unit installed on the hook and connected to / detached from the manual rotating section.

[0013] A further preferred technical solution is that the temporary locking unit includes an extension plate installed on the hook and extending away from the positioning unit, a magnet B arranged at one end of the extension plate away from the hook, a connecting shaft B hinged on the end of the extension plate away from the hook, two rotating rods respectively arranged at both ends of the connecting shaft B, two bending rods respectively arranged at the lower ends of the two rotating rods, a connecting rod with two ends respectively connected to the two bending rods, and a connecting block arranged on the connecting rod and used to be connected to the magnet B.

[0014] A further preferred technical solution is that the anti-unhooking device further comprises a mounting seat unit which is detachably arranged on the hook and is used for mounting the anti-unhooking unit and the temporary locking unit.

[0015] A further preferred technical solution is that the mounting seat unit includes two seat bodies relatively arranged on both sides of the hook, two connecting plates arranged at both ends of the seat bodies, threaded holes arranged on the connecting plates, and bolts arranged in the threaded holes for connecting the two relatively connecting plates.

[0016] A further preferred technical solution is that the connecting section, the blocking section and the rotating rod are telescopic rods.

[0017] A further preferred technical solution is that the temporary locking unit further includes an anti-slip layer arranged on the bending rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall schematic diagram of the utility model in a closed state;

[0019] Figure 2 It is a partial schematic diagram of the utility model;

[0020] Figure 3 It is an overall schematic diagram of the utility model in the opened state;

[0021] Figure 4 This is a schematic diagram of a temporary locking unit of the utility model;

[0022] Figure 5 It is a side view of the utility model in the closed state;

[0023] Figure 6 It is a top view of the utility model in the opened state.

[0024] In the figure, the meanings of the reference numerals are as follows:

[0025] Hook a;

[0026] Anti-drop unit 1, positioning unit 2, temporary locking unit 3, mounting seat unit 4;

[0027] Connecting shaft A11, connecting section 12, blocking section 13, manual rotating section 14, torsion spring 21, magnet A22, connecting seat 23, extension plate 31, magnet B32, connecting shaft B33, rotating rod 34, bending rod 35, connecting rod 36, iron block 37, seat body 41, connecting plate 42, threaded hole 43, bolt 44. DETAILED DESCRIPTION

[0028] The following is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. The following description is only a preferred embodiment of the present invention and does not limit the scope of the present invention.

[0029] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. The words "inside" and "outside" refer to the direction toward or away from the geometric center of a specific component, respectively. They are relative concepts, and therefore may change accordingly according to different locations and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0030] Embodiment 1

[0031] As attached Figure 1-6 As shown, an anti-unhooking device suitable for a crane hook comprises an anti-unhooking unit 1 hingedly mounted on the hook a and used for opening and closing the opening of the hook a, and a positioning unit 2 arranged on the hook a and causing the anti-unhooking unit 1 to keep closing the opening of the hook a; the anti-unhooking unit 1 comprises a connecting shaft A11 hingedly mounted on the hook a, two connecting sections 12 respectively arranged at both ends of the connecting shaft A11, a blocking section 13 respectively connected to the two connecting sections 12 at both ends and located on the inner side of the hook body of the hook a, and a manual rotating section 14 arranged on the connecting section 12 away from the end of the blocking section 13 and located on the outer side of the hook body of the hook a.

[0032] In this embodiment, the general method of using the anti-unhooking device applicable to the gantry crane hook is as follows:

[0033] When it is necessary to use the hook a to lift an object, the manual rotating section 14 of the anti-slip unit 1 is pushed upward to drive the blocking section 13 to rotate toward the inside of the hook a, and an opening is formed between the blocking section 13 and the hook a, at which time the suspended object can be placed or taken out of the hook a, and then the manual rotating section 14 is pushed downward to drive the blocking section 13 to rotate toward the outside of the hook a, and finally the blocking section 13 will come into contact with the inner surface of the hook a, preventing the anti-slip unit 1 from further rotating; the blocking section 13 is a U-shaped rod as a whole, and the manual rotating section 14 is preferably a U-shaped rod for easy manual operation; the length of the blocking section 13 is greater than the opening width of the hook a, and should not be too long, so as to ensure that it can come into contact with the hook a while minimizing the restriction on the size of the suspended object; the anti-slip unit 1 ensures that the blocking section 13 maintains a state of contact with the inner side of the opening of the hook a when the device is not subjected to external force through the positioning unit 2, thereby preventing the suspended object from falling off the hook a.

[0034] In this embodiment, the positioning unit 2 includes a torsion spring 21 provided at the hinge between the connecting shaft A11 and the hook a.

[0035] In this embodiment, the torsion spring 21 arranged at the hinge between the connecting shaft A11 and the hook a plays a role when subjected to an external force that lifts the manual rotating section 14 upward, ensuring that the anti-detachment unit 2 can naturally fall back to a closed state in contact with the opening of the hook a after the external force disappears, one end of the torsion spring 21 is connected to the inner wall of the hole of the hook a for the connecting shaft A11 to pass through, and the other end is connected to the surface of the connecting shaft A11, or the two ends of the torsion spring 21 are connected to different positions of the inner wall of the hole of the hook a for the connecting shaft A11 to pass through, to ensure that the torsion spring 21 can provide a reset torque.

[0036] Embodiment 2

[0037] This embodiment, as a parallel embodiment of the first embodiment, discloses a positioning unit structure for keeping the hook opening closed, which is specifically as follows:

[0038] The positioning unit 2 includes a magnet A22 installed inside the opening of the hook a.

[0039] In this embodiment, the blocking section 13 is an iron rod, and the magnet A22 installed on the inner side of the opening of the hook a generates an attractive force on the blocking section 13 to ensure that when the blocking section 13 comes close to the opening position of the hook a, it naturally contacts the inner side of the hook and always keeps the opening closed under general interference external forces.

[0040] As a preferred embodiment of this embodiment, the positioning unit 2 also includes a connecting seat 23 which is detachably connected to the hook a and is used to install the magnet A22.

[0041] In this embodiment, the positioning unit 2 is connected to the hook a in a detachable manner, and can be directly applied to the existing hook to adapt to various situations. The positioning unit 2 can also be fine-tuned according to the shape of the object to be suspended. The connecting seat 23 can be set as a mounting strap, which is connected to the hook a in various ways such as lacing, buckling, and overlapping. It can also be set in various forms such as a clamp, a splint, etc. to stably connect the mounting seat with a magnet A22 installed on the surface to the hook a.

[0042] The advantage of the device provided in this embodiment is that the hook is kept in contact with the blocking section by the suction force of the magnet to close the hook opening. Compared with the torsion spring switch that requires a large external force to open, the magnet will only have a greater effect when the blocking section enters a certain range, and the suction force it provides gradually increases with the shrinkage distance, which is more convenient for personnel to operate to a certain extent and improves safety. At the same time, the use of a detachable component structure to be directly installed on the existing hook expands the application range of the device, saves costs and is more environmentally friendly.

[0043] Embodiment 3

[0044] The difference of this embodiment is that, based on the first embodiment or the second embodiment, a temporary locking unit is added to keep the anti-drop unit stable when the hook opening is open, as follows:

[0045] The anti-unhooking device also includes a temporary locking unit 3 installed on the hook a and connected / separated from the manual rotating section 14; the temporary locking unit 3 includes an extension plate 31 installed on the hook a and extending in a direction away from the positioning unit 2, a magnet B32 arranged on the end of the extension plate 31 away from the hook a, a connecting shaft B33 hinged on the end of the extension plate 31 away from the hook a, two rotating rods 34 respectively arranged at both ends of the connecting shaft B33, two bending rods 35 respectively arranged at the lower ends of the two rotating rods 34, a connecting rod 36 with two ends respectively connected to the two bending rods 35, a connecting block 37 arranged on the connecting rod 36 and used to connect to the magnet B32, and an anti-slip layer arranged on the bending rod 35.

[0046] In this embodiment, the manual rotating section 14 is manually pushed upward to open the opening of the hook a for placing or unloading the suspended object. During this process, the temporary locking unit 3 temporarily fixes the end of the manual rotating section 14 away from the hook to prevent the manual rotating section 14 from falling back during operation and causing the blocking section 13 to squeeze the person's hand; the end of the manual rotating section 13 away from the hook is rotated to a position in contact with the lower end of the extension plate 31, and the rotating rod 34 is pushed to make the bending plate 35 come into contact with the manual rotating section 13, thereby making the connecting block 37 set on the connecting rod 36 enter the force range of the magnet B32. The connecting block 37 is an iron block, so the magnet B32 attracts the connecting block 37 to be in close contact with the magnet B32, so that the manual rotating section 13 is supported by the bending plate 35 and remains stable. Furthermore, an anti-slip layer is provided on the surface of the bending plate 35 close to the extension plate 31, which further enhances the stability of the temporary locking unit 3.

[0047] The advantage of the device provided in this embodiment is that it can temporarily lock the status of the entire device when the hook opening is opened, so that the operator can have sufficient time to place or remove the suspended object, avoiding accidental injuries caused by the falling back of the anti-falling frame. The device has a simple structure and is easy to operate. The locking can be quickly completed by simply pushing the anti-falling frame upwards and then pushing the rotating rod downwards.

[0048] Embodiment 4

[0049] The difference of this embodiment is that, on the basis of the third embodiment, a mounting seat unit is added, which can directly apply the device to the existing hook, as follows:

[0050] The anti-unhooking device also includes a mounting seat unit 4 which is detachably arranged on the hook a and is used to install the anti-unhooking unit 1 and the temporary locking unit 3; the mounting seat unit 4 includes two seat bodies 41 relatively arranged on both sides of the hook a, two connecting plates 42 arranged at both ends of the seat body 41, threaded holes 43 arranged on the connecting plates 42, and bolts 44 arranged in the threaded holes 43 for connecting the two relatively connecting plates 42.

[0051] In this embodiment, the anti-unhooking device is detachably connected to the existing hook by setting a mounting seat unit 4, and two seat bodies 41 are arranged around the vertical section of the hook a. The rotating bolt 44 is retracted into the relative distance of the connecting plate 42 so that the two seat bodies 41 are tightly connected to the hook a, wherein the extension plate 31 is installed on one seat body 41, and the connecting axis A11 is hinged on the other seat body 41.

[0052] As a preference of this embodiment, the connecting section 12, the blocking section 13 and the rotating rod 34 are telescopic rods.

[0053] In this embodiment, in order to better adapt to existing hooks of various sizes and shapes, the connecting section 12, the blocking section 13 and the rotating rod 34 are configured as a retractable rod body, and the length is adjusted according to the opening size of the hook a under actual circumstances. The retractable form can be set in the form of a threaded sleeve, and the length of the rod body can be adjusted by rotating the position of the externally threaded inner cylinder within the internally threaded outer cylinder.

[0054] The advantage of the device provided in this embodiment is that the anti-unhooking device can be directly applied to the existing hook without any modification to the hook, and can be reused while meeting the multiple functions of the above-mentioned embodiment, thereby saving manufacturing costs.

[0055] The above is a detailed description of the implementation of the utility model in conjunction with the accompanying drawings, but the utility model is not limited to the above implementation. Various modifications can be made within the knowledge of ordinary technicians in the technical field without departing from the purpose of the utility model. These are all non-creative modifications and are protected by patent law as long as they are within the scope of the claims of the utility model.

Claims

1. An anti-unhooking device suitable for a gantry crane hook, characterized in that: The invention comprises an anti-drop unit (1) hingedly mounted on a hook (a) and used for opening and closing the opening of the hook (a), and a positioning unit (2) arranged on the hook (a) and enabling the anti-drop unit (1) to keep closing the opening of the hook (a); the anti-drop unit (1) comprises a connecting shaft A (11) hingedly mounted on the hook (a), two connecting sections (12) respectively arranged at two ends of the connecting shaft A (11), a blocking section (13) respectively connected to the two connecting sections (12) at two ends and located on the inner side of the hook body of the hook (a), and a manual rotating section (14) arranged at the end of the connecting section (12) away from the blocking section (13) and located on the outer side of the hook body of the hook (a).

2. The anti-unhooking device for a gantry crane hook according to claim 1, characterized in that: The positioning unit (2) comprises a torsion spring (21) arranged at a hinge between the connecting shaft A (11) and the hook (a).

3. The anti-unhooking device for a gantry crane hook according to claim 1, characterized in that: The positioning unit (2) comprises a magnet A (22) mounted on the inner side of the opening of the hook (a).

4. The anti-unhooking device for a gantry crane hook according to claim 3, characterized in that: The positioning unit (2) further comprises a connecting seat (23) which is detachably connected to the hook (a) and is used for mounting the magnet A (22).

5. The anti-unhooking device for a gantry crane hook according to claim 1 or 4, characterized in that: The anti-unhooking device further comprises a temporary locking unit (3) installed on the hook (a) and connected to / detached from the manual rotating section (14).

6. The anti-unhooking device for a gantry crane hook according to claim 5, characterized in that: The temporary locking unit (3) comprises an extension plate (31) mounted on the hook (a) and extending in a direction away from the positioning unit (2), a magnet B (32) arranged at an end of the extension plate (31) away from the hook (a), a connecting shaft B (33) hinged to an end of the extension plate (31) away from the hook (a), two rotating rods (34) respectively arranged at both ends of the connecting shaft B (33), two bending rods (35) respectively arranged at the lower ends of the two rotating rods (34), a connecting rod (36) whose two ends are respectively connected to the two bending rods (35), and a connecting block (37) arranged on the connecting rod (36) and used to be connected to the magnet B (32).

7. The anti-unhooking device for a gantry crane hook according to claim 6, characterized in that: The anti-off-hook device further comprises a mounting seat unit (4) which is detachably arranged on the hook (a) and is used for mounting the anti-off-hook unit (1) and the temporary locking unit (3).

8. The anti-unhooking device for a gantry crane hook according to claim 7, characterized in that: The mounting seat unit (4) comprises two seat bodies (41) arranged on both sides of the hook (a) in opposite directions, two connecting plates (42) arranged at both ends of the seat bodies (41), threaded holes (43) arranged on the connecting plates (42), and bolts (44) arranged in the threaded holes (43) and used for connecting the two connecting plates (42) in opposite directions.

9. The anti-unhooking device for a gantry crane hook according to claim 7, characterized in that: The connecting section (12), the blocking section (13) and the rotating rod (34) are telescopic rods.

10. The anti-unhooking device for a gantry crane hook according to claim 6, characterized in that: The temporary locking unit (3) further comprises an anti-slip layer provided on the bending rod (35).

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