Automatic detacher

Abstract

An automatic detacher relates to the technical field of lifting hooks and comprises a sling connecting piece (1), a connecting frame (2), an upper hook body (3) and a lower hook body (4), springs are arranged between the sling connecting piece (1) and the connecting frame (2) and between the connecting frame (2) and the upper hook body (3) respectively, a self-locking reed (7) is arranged on the connecting frame (2), one end of the self-locking reed (7) is connected to the connecting frame (2), and the other end of the self-locking reed (7) is connected to the lower hook body (4). One end of the sling connecting piece (1) is bent inwards, the free end of the other end of the sling connecting piece (1) is bent inwards to abut against the clamping shoulder (6) of the upper hook body (3), when the sling connecting piece (1) abuts against the clamping shoulder (6), the length of the lower end of the sling connecting piece (1) is smaller than that of the self-locking reed (7), and the sling connecting piece (1) and the upper hook body (3) are provided with flush matching faces on the face, on the same side as the self-locking reed (7), of the joint and the face, on the same side as the self-locking reed (7), of the sling connecting piece (1) and the face, on the same side as the self-locking reed (7). The device has the advantages of reasonable design, simple structure and convenience in use.

Description

TECHNICAL FIELD

[0001] The utility model relates to a hook, concretely relates to a hook device which can realize automatic unhooking. BACKGROUND

[0002] The automatic unhooking device can realize the function of automatic unhooking and unloading in hoisting operation, greatly improving the operation efficiency of hoisting business. With the rise of unmanned aerial vehicle express business and other industries, the demand for automatic unhooking devices is also increasing. The invention patent with the publication number CN112758812A discloses an "automatic unhooking device" structure, which realizes the effect of automatic unhooking and unloading. However, it is found in actual use that when the rope is hung but the hoisting load is not applied to the rope, the hook needs to be held by hand to prevent it from loosening, resulting in the falling of the hung rope. Although the above-mentioned "automatic unhooking device" invention patent has a technical solution of using a conversion block to convert the hook body between the automatic opening and manual opening states, providing a locking function. However, once the locking function provided by the conversion block is used, the automatic unhooking function cannot be realized during unloading without manual unlocking, so the locking structure provided is still not convenient enough. SUMMARY

[0003] The technical problem to be solved by the utility model is to provide an automatic unhooking device with a self-locking function which is more convenient to use.

[0004] The technical solution of the utility model is an automatic unhooking device, which comprises a sling connecting piece, a connecting frame, an upper hook body and a lower hook body. The end of the connecting frame is provided with an abutting part matched with the free end of the lower hook body. The outer side edge of the upper hook body is provided with a shoulder matched with the lower end of the sling connecting piece. Springs are respectively arranged between the sling connecting piece and the connecting frame and between the connecting frame and the upper hook body. A self-locking spring leaf is arranged on the connecting frame. One end of the self-locking spring leaf is connected to the connecting frame, and the free end of the other end is bent inward to abut against the shoulder position of the upper hook body. When the sling connecting piece abuts against the shoulder, the length of the lower end of the sling connecting piece is smaller than that of the self-locking spring leaf. The two connecting parts of the sling connecting piece and the upper hook body are provided with flush matching surfaces on the same side as the self-locking spring leaf, so that the self-locking spring leaf can be pushed away from the shoulder through the matching surface when the lower end of the sling connecting piece is connected to the shoulder.

[0005] The utility model has the advantages of reasonable design, simple structure and convenient use. After the sling is hung, the self-locking function of the self-locking spring leaf can prevent the hook from loosening, thereby freeing the operator's hands to do more things. After the hook is hoisted and stressed, the self-locking spring leaf is automatically lifted and leaves the locking position, so that the automatic unlocking function can be realized without personnel intervention during unloading. BRIEF DESCRIPTION OF DRAWINGS

[0006] Figure 1It is front structure schematic diagram of the hanging goods state of the utility model;

[0007] Figure 2 It is side structure schematic diagram of the utility model self-locking spring leaf;

[0008] Figure 3 It is back structure schematic diagram of the hanging goods state of the utility model;

[0009] Figure 4 It is the schematic diagram of the goods unhooking after the utility model;

[0010] Figure 5 It is structure schematic diagram of the hanging goods state of the utility model;

[0011] Figure 6 It is the schematic diagram of the goods unhooking after the utility model. DETAILED DESCRIPTION

[0012] As Figures 1 to 6As shown, an automatic unhooker includes a sling connector 1, a connecting frame 2, an upper hook body 3, and a lower hook body 4. The connecting frame 2 is provided with an abutting portion 5 at the end thereof to cooperate with the free end of the lower hook body. The outer side edge of the upper hook body 3 is provided with a shoulder 6 to cooperate with the lower end of the sling connector 1. Springs are respectively arranged between the sling connector 1 and the connecting frame 2 and between the connecting frame 2 and the upper hook body 3. The connecting frame 2 is provided with a self-locking spring leaf 7. One end of the self-locking spring leaf 7 is connected to the connecting frame 2, and the free end of the other end is inwardly bent to abut against the shoulder 6 of the upper hook body 3. When the sling connector 1 abuts against the shoulder 6, the length of the lower end of the sling connector 1 is slightly smaller than the self-locking spring leaf 7. The two of the sling connector 1 and the upper hook body 3 are provided with flush cooperation surfaces on the same side of the self-locking spring leaf 7 at the connection position, so that when the lower end of the sling connector 1 is connected to the shoulder 6, the self-locking spring leaf 7 can be squeezed away from the shoulder 6 through the cooperation surface. The spring between the sling connector and the connecting frame provides a force for the sling connector to separate from the shoulder. The spring between the connecting frame and the upper hook body overcomes the friction between the self-locking spring leaf and the upper hook body, so that the hook body is more easily opened. Since the self-locking spring leaf is slightly longer, after being squeezed away, the end thereof will be stretched onto the cooperation surface of the upper hook body. During operation, the self-locking spring leaf is moved away from the shoulder position, so that the hook can be completely opened. After the sling is hung, in order to free the hands of the operator, the self-locking function provided by the self-locking spring leaf is used. Only the upper hook body and the lower hook body are closed, and the self-locking spring leaf is pinched to abut against the shoulder under the action of the self-locking spring leaf, so that the purpose of closing the hook is easily achieved. After lifting, the hook is expanded in the upward and downward directions under the pulling force from the upper and lower ends. At this time, the lower end of the sling connector abuts against the shoulder of the upper hook body, replacing the function of the self-locking spring leaf, and the self-locking spring leaf is pushed away from the shoulder through the cooperation of the side surface and the inner surface of the self-locking spring leaf. When unloading, the goods are dropped to the ground, so that the hook loses the downward pulling force. Under the action of the spring, the end of the sling connector is separated from the shoulder, the upper hook body is opened, and the free end of the lower hook body is separated from the abutting portion of the connecting frame, so that the sling is automatically separated from the hook.

[0013] The self-locking spring leaf 7 is hinged to the connecting frame 2, so that the self-locking spring leaf can swing to the left and right sides. When the self-locking spring leaf is not used, the free end thereof is attached to the connecting frame to be away from the shoulder position. A certain friction resistance is arranged at the hinge position, so that the self-locking spring leaf will not be affected by the action force of the spring when abutting against the shoulder.

[0014] One side of the self-locking spring leaf 7 is provided with an inwardly protruding stop block 8 (see Figure 2 ) to cooperate with the edge of the connecting frame 2. When the self-locking spring leaf is lifted to cooperate with the shoulder, the stop block can cooperate with the connecting frame on one side, so that the opening angle of the self-locking spring leaf is slightly larger than 90 degrees (with reference to the plane of the shoulder), thereby achieving a stable supporting effect. The stop block can also be arranged on both sides to fix the self-locking spring leaf at a specific position.

[0015] The self-locking spring blade 7 is provided with an inward protrusion 9 near its free end (see Figure 2 ). The protrusion cooperates with the side of the sling connector, making it easier to be squeezed off the clamping shoulder.

[0016] The connecting frame 2 is provided with an auxiliary sling connecting ring 10 at the end where the abutting part 5 is located. If the space surrounded by the upper and lower hook bodies is smaller than the thickness of the sling connected to the cargo, or if other lifting hooks are not convenient for direct hanging, the auxiliary sling can be used to connect with the connecting ring. One end of the auxiliary sling is fixedly connected with the connecting ring, and the other end is provided with a rope ring for connecting with the lifting hook.

[0017] The auxiliary sling connecting ring 10 is connected with an auxiliary sling 11 (see Figure 4 、 5 、6), one end of the auxiliary sling 11 is fixedly connected with the connecting ring 10, and the other end is provided with a sling ring for cooperating with the lifting hook.

[0018] The sling connector 1 and the upper hook body 3 are made of sheet bodies with equal thickness, and the connecting frame has flat mating surfaces on both sides.

Claims

1. An automatic unhooking device, comprising a sling connector (1), a connecting frame (2), an upper hook body (3), and a lower hook body (4), wherein the end of the connecting frame (2) is provided with an abutment part (5) that cooperates with the free end of the lower hook body, and the outer edge of the upper hook body (3) is provided with a shoulder (6) that cooperates with the lower end of the sling connector (1), and springs are respectively provided between the sling connector (1) and the connecting frame (2) and between the connecting frame (2) and the upper hook body (3), characterized in that, The connecting frame (2) is provided with a self-locking spring sheet (7), one end of which is connected to the connecting frame (2), and the other end is bent inward to the position of the clamping shoulder (6) of the upper hook body (3). When the sling connecting piece (1) is abutted against the clamping shoulder (6), the length of the lower end of the sling connecting piece (1) is less than that of the self-locking spring sheet (7), and the two are provided with flush matching surfaces on the same side of the self-locking spring sheet (7) at the connecting position, so that when the lower end of the sling connecting piece (1) is matched and connected with the clamping shoulder (6), the self-locking spring sheet (7) can be squeezed away from the clamping shoulder (6) through the matching surface.

2. The automatic uncoupler of claim 1, wherein The self-locking spring sheet (7) is hinged to the connecting frame (2).

3. The automatic uncoupler of claim 2, wherein One side of the self-locking spring sheet (7) is provided with an inwardly protruding stop block (8) matched with the edge of the connecting frame (2).

4. The automatic uncoupler according to any of claims 1 to 3, characterized in that The self-locking spring sheet (7) is provided with an inwardly protruding portion (9) near the free end thereof.

5. The automatic uncoupler of claim 1, wherein The connecting frame (2) is provided with an auxiliary sling connecting ring (10) at one end thereof provided with the abutting portion (5).

6. The automatic uncoupler of claim 5, wherein The auxiliary sling connecting ring (10) is connected with an auxiliary sling (11), one end of which is fixedly connected with the connecting ring (10), and the other end is provided with a sling ring matched with the hook.

7. The automatic uncoupler of claim 1, 2, 3, 5 or 6, wherein, The sling connecting piece (1) and the upper hook body (3) are made of sheet bodies with equal thickness.

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