Anti-unhooking device for lifting hook

Abstract

A lifting hook comprises a bent hook and a straight handle arranged at the top of the bent hook, a hook tip is arranged on one side of the bent hook, a hook back is arranged on the other side of the bent hook, a hook opening is formed in the position between the hook tip and the straight handle, the anti-unhooking device comprises an anti-disengaging plate located at the position of the hook opening, and the anti-disengaging plate is arranged on the hook opening. One end of the anti-falling plate is rotationally connected with the straight handle above the hook opening, and the length of the anti-falling plate is matched with the width of the hook opening; one end of the balance weight plate is connected with the anti-falling plate, the other end of the balance weight plate extends to the hook back, the torque of the balance weight plate is larger than that of the anti-falling plate, and the hook is installed on the straight handle and located on the same side as the balance weight plate; according to the utility model, the counterweight plate naturally droops under the action of gravity, so that one end of the anti-falling plate is clamped with the hook tip, and the hook opening is in a locked state; and when the counterweight plate is lifted, the hooking piece is connected with the hook, so that the anti-falling plate is separated from the hook tip, and the hook opening is kept in an open state.

Description

Technical Field

[0001] The utility model relates to a hook anti-unhooking device. Background Art

[0002] As a key component of lifting equipment, hooks are widely used in various loading, unloading, and handling operations. However, the torsion springs in conventional hooks have a limited service life, are easily damaged, and are highly susceptible to environmental influences. This can result in the safety latch not properly sealing the hook. Furthermore, the hooks themselves lack anti-unhook features, making it easy for the sling to fall off during lifting.

[0003] For example, in the prior art, application number 201410702675.0 discloses a hook that uses a safety latch to rotate and close the hook body, and a transmission connecting plate connected to the safety latch. The gravity of the transmission connecting plate keeps the safety latch closed. However, this solution is not conducive to hooking the hook to the lifting object. When hooking, the transmission connecting plate must be held up and then the lifting rope is inserted into the hook. However, if the hook is large, this operation is inconvenient and unsafe. Therefore, the design of a device that can keep the hook mouth open without requiring hands is currently a problem that needs to be solved. Summary of the Invention

[0004] In order to solve the problem that the hook in the prior art needs to be held by hand to ensure that the hook mouth is in an open state when hanging the lifting rope, the utility model provides a hook anti-unhooking device, the specific scheme is as follows:

[0005] A hook anti-unhooking device, the hook comprises a curved hook and a straight handle arranged at the top of the curved hook, one side of the curved hook has a hook tip, the other side of the curved hook is a hook back, and the position between the hook tip and the straight handle is a hook mouth, characterized in that the anti-unhooking device comprises:

[0006] An anti-slip plate is located at the hook mouth, one end of which is rotatably connected to the straight handle above the hook mouth, and the length of the anti-slip plate matches the width of the hook mouth;

[0007] The counterweight plate has one end connected to the anti-slip plate and the other end extending to the hook back. The torque of the counterweight plate is greater than the torque of the anti-slip plate. The counterweight plate naturally droops under gravity, causing one end of the anti-slip plate to engage with the hook tip, so that the hook mouth is in a locked state.

[0008] The hook is installed on the straight handle, the hook groove of the hook is set upward and on the same side as the counterweight plate, and the counterweight plate is provided with a hanging piece that can be stuck in the groove.

[0009] Furthermore, the straight handle is located above the hook mouth and is provided on the rotating shaft, and the anti-slip plate is rotatably connected to the rotating shaft.

[0010] Furthermore, the two ends of the rotating shaft are respectively located on the outside of the straight handle, the straight handle is a U-shaped frame, the end of the U-shaped frame away from the rotating shaft is a closed end, and the anti-slip side plates on both sides of the U-shaped frame are respectively rotatably connected to the two ends of the rotating shaft.

[0011] Furthermore, the counterweight plate includes two counterweight side plates, which are respectively connected to the two anti-slip side plates, and the hanging member is a connecting rod arranged between the two counterweight side plates.

[0012] Furthermore, the connecting rod is a curved rod, and both ends of the connecting rod are rotatably connected to the two counterweight side plates respectively.

[0013] Furthermore, symmetrically arranged sliding grooves are respectively provided in the two counterweight side plates, and the connecting rod is slidably connected between the two sliding grooves.

[0014] Furthermore, the two counterweight side plates are respectively connected integrally with the corresponding anti-slip side plates.

[0015] Furthermore, the counterweight side plate is located at the rotation end of the anti-slip side plate, and the counterweight side plate and the anti-slip side plate form an L-shaped structure.

[0016] Compared with the prior art, the advantages of the present invention are as follows:

[0017] 1. The utility model allows the counterweight plate to droop naturally due to gravity, so that one end of the anti-slip plate is engaged with the hook tip, so that the hook mouth is in a locked state; when the counterweight plate is lifted, it is connected to the hook through the hanging piece, so that the anti-slip plate is separated from the hook tip, so that the hook mouth remains in an open state. There is no need to manually lift the counterweight plate, and the hook can be operated with both hands to hook the lifting rope, which reduces the difficulty of operation and improves safety.

[0018] 2. The connecting member connected to the hook in the present invention is a connecting rod, and the connecting rod structure is a bent rod. When the counterweight plate is lifted, the bent rod can be rotated to make it fit into the groove of the hook.

[0019] 3. The connecting member connected to the hook in the present invention is a connecting rod, which is slidably connected to the counterweight plate. When the counterweight plate is lifted, the connecting rod can be slid to make it fit into the groove of the hook. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the utility model;

[0021] Figure 2 Open the state structure diagram for the hook;

[0022] Figure 3 The anti-slip plate is a U-shaped frame structure diagram;

[0023] Figure 4 for Figure 1 Right view of;

[0024] Figure 5 This is a structural diagram of the connecting rod being a curved rod.

[0025] Reference numerals:

[0026] 1. Hook; 2. Straight handle; 3. Hook tip; 4. Anti-slip plate; 4-1. Anti-slip side plate; 5. Counterweight plate; 5-1. Counterweight side plate; 6. Hook; 7. Rotating shaft; 8. Connecting rod; 9. Slide groove. DETAILED DESCRIPTION

[0027] The technical solution of the utility model will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments.

[0028] Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the utility model.

[0029] In the description of the utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the utility model and simplify the description. They do not indicate or imply that the devices or components referred to have a specific orientation, are constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of the utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the utility model based on the specific circumstances. Example

[0031] like Figure 1 As shown, a hook anti-unhooking device, the hook includes a curved hook and a straight handle arranged at the top of the curved hook, one side of the curved hook has a hook tip, the other side of the curved hook is a hook back, and the position between the hook tip and the straight handle is a hook mouth, the anti-unhooking device includes,

[0032] An anti-slip plate is located at the hook mouth, one end of the anti-slip plate is rotatably connected to the straight handle above the hook mouth, and the length of the anti-slip plate matches the width of the hook mouth; the straight handle is located above the hook mouth and is arranged on the rotating shaft, and the anti-slip plate is rotatably connected to the rotating shaft.

[0033] The counterweight plate has one end connected to the anti-slip plate and the other end extending to the hook back. The torque of the counterweight plate is greater than the torque of the anti-slip plate. The counterweight plate naturally droops under gravity, causing one end of the anti-slip plate to engage with the hook tip, so that the hook mouth is in a locked state.

[0034] The hook is installed on the straight handle and on the same side as the counterweight plate. The counterweight plate is provided with a hanging piece connected with the hook. Example

[0035] like Figures 1 to 4 As shown, the two ends of the rotating shaft are respectively located on the outside of the straight handle, and the straight handle is a U-shaped frame. The end of the U-shaped frame away from the rotating shaft is a closed end, and the anti-slip side plates on both sides of the U-shaped frame are rotatably connected to the two ends of the rotating shaft. The counterweight plate includes two counterweight side plates, which are respectively connected to the two anti-slip side plates, and the hanging member is a connecting rod arranged between the two counterweight side plates. The two counterweight side plates are respectively provided with symmetrically arranged sliding grooves, and the connecting rod is slidably connected between the two sliding grooves. The two counterweight side plates are respectively connected as a whole with the corresponding anti-slip side plates. The counterweight side plate is located at the rotating end of the anti-slip side plate, and the counterweight side plate and the anti-slip side plate form an L-shaped structure. Example

[0036] like Figure 5 As shown, specifically, the two ends of the rotating shaft are respectively located on the outside of the straight handle, and the straight handle is a U-shaped frame. The end of the U-shaped frame away from the rotating shaft is a closed end, and the anti-slip side plates on both sides of the U-shaped frame are rotatably connected to the two ends of the rotating shaft. The counterweight plate includes two counterweight side plates, which are respectively connected to the two anti-slip side plates, and the hanging member is a connecting rod arranged between the two counterweight side plates. The connecting rod is a curved rod, and the two ends of the connecting rod are respectively rotatably connected to the two counterweight side plates. The two counterweight side plates are respectively connected as one piece with the corresponding anti-slip side plates. The counterweight side plate is located at the rotating end of the anti-slip side plate, and the counterweight side plate and the anti-slip side plate form an L-shaped structure.

[0037] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A hook anti-unhooking device, comprising a hook and a straight handle provided at the top of the hook, wherein one side of the hook has a hook tip, the other side of the hook is a hook back, and the position between the hook tip and the straight handle is a hook mouth, characterized in that: The anti-unhooking device comprises: An anti-slip plate is located at the hook mouth, one end of which is rotatably connected to the straight handle above the hook mouth, and the length of the anti-slip plate matches the width of the hook mouth; The counterweight plate has one end connected to the anti-slip plate and the other end extending to the hook back. The torque of the counterweight plate is greater than the torque of the anti-slip plate. The counterweight plate naturally droops under gravity, causing one end of the anti-slip plate to engage with the hook tip, so that the hook mouth is in a locked state. The hook is installed on the straight handle, the hook groove of the hook is set upward and on the same side as the counterweight plate, and the counterweight plate is provided with a hanging piece that can be stuck in the groove.

2. The hook anti-unhooking device according to claim 1, characterized in that: The straight handle is located above the hook mouth and is arranged on the rotating shaft, and the anti-slip plate is rotatably connected to the rotating shaft.

3. The hook anti-unhooking device according to claim 2, characterized in that: The two ends of the rotating shaft are respectively located on the outside of the straight handle, and the straight handle is a U-shaped frame. The end of the U-shaped frame away from the rotating shaft is a closed end, and the anti-slip side plates on both sides of the U-shaped frame are respectively rotatably connected to the two ends of the rotating shaft.

4. The hook anti-unhooking device according to claim 3, characterized in that: The counterweight plate includes two counterweight side plates, which are respectively connected to the two anti-slip side plates, and the hanging member is a connecting rod arranged between the two counterweight side plates.

5. The hook anti-unhooking device according to claim 4, characterized in that: The connecting rod is a curved rod, and both ends of the connecting rod are rotatably connected to the two counterweight side plates respectively.

6. The hook anti-unhooking device according to claim 4, characterized in that: The two counterweight side plates are respectively provided with symmetrically arranged sliding grooves, and the connecting rod is slidably connected between the two sliding grooves.

7. The hook anti-unhooking device according to claim 4, characterized in that: The two counterweight side plates are respectively connected integrally with the corresponding anti-slip side plates.

8. The hook anti-unhooking device according to claim 7, characterized in that: The counterweight side plate is located at the rotation end of the anti-slip side plate, and the counterweight side plate and the anti-slip side plate form an L-shaped structure.

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