A hand puller

Abstract

The application discloses a hand puller, relates to the technical field of truck transportation object binding, and comprises a hand pull movable frame, one end of the hand pull movable frame is detachably connected with a connecting rod used for connecting a binding belt, the other end of the hand pull movable frame is rotationally connected with a rotating handle frame through a rotating shaft provided with a half moon key, and the opening of the half moon key of the rotating shaft is used for the passing of the binding belt; the two end openings of the half moon key of the rotating shaft are respectively provided with buckling ratchets, the buckling ratchets are respectively used for being limitedly buckled in the two end openings of the half moon key of the rotating shaft, and rotate together with the rotating shaft; and the two end openings of the half moon key of the rotating shaft are respectively connected through limiting pins and used for limiting the buckling ratchets to be buckled in the opening of the half moon key of the rotating shaft. Through the hand puller, telescopic adjustment can be realized, different environments can be conveniently adapted, and the hand can be conveniently held and operated, and operation space is flexible.

Description

Technical Field

[0001] This invention relates to the field of cargo securing technology for truck transportation, specifically a hand-operated tether. Background Technology

[0002] Currently, securing cargo on trucks mainly relies on three methods: rope binding, steel strapping, and simple rope tightening devices. Rope binding: Represented by nylon ropes and steel wire ropes, it is fixed by tying knots manually. Its disadvantages are that the fastening force depends on manual experience, the knots are prone to loosening due to bumps in the vehicle, and the small contact area between the rope and the goods can easily cause local pressure damage. Steel strapping: Suitable for bundling heavy goods, but steel straps are rigid, require special tools for operation, and are prone to breakage due to deformation of goods, and cannot absorb the impact force during transportation; Simple rope tensioners: These mostly use a screw-type structure, which can provide a certain tightening force, but the adjustment stroke is short and cannot adapt to goods of different sizes. In addition, the locking mechanism is prone to failure due to dust and rust.

[0003] As the standardization process in the logistics industry accelerates, the "Regulations on Road Freight Transport and Station Management" issued by the Ministry of Transport of China clearly requires that heavy freight transport must use securing devices that comply with the EN12195-2 standard. At the same time, the rise of e-commerce express delivery and less-than-truckload (LTL) freight has placed higher demands on the operational efficiency, versatility, and protective capabilities of freight securing devices.

[0004] The existing strapping technology on the market has the following shortcomings: it cannot adjust the length of the handle, which makes it impossible to adjust flexibly according to the operating space. Summary of the Invention

[0005] The objective of this invention is achieved through the following technical solution: A hand puller includes a movable hand pull frame, one end of which is detachably connected to a connecting rod for connecting a binding strap, and the other end of which is rotatably connected to a rotating handle frame via a pivot with a half-moon key, wherein the opening of the half-moon key on the pivot is for the binding strap to pass through. The two ends of the half-moon key of the rotating shaft are respectively provided with a snap-lock ratchet. The snap-lock ratchet is used to limit and lock in the two ends of the half-moon key of the rotating shaft and rotates together with the rotating shaft. The two ends of the half-moon key of the rotating shaft are respectively connected by a limit pin, which is used to limit and lock the snap-lock ratchet in the opening of the half-moon key of the rotating shaft. The manual movable frame includes two symmetrically arranged connecting side plates. A connecting rod for connecting the binding strap is located at the end of the two connecting side plates away from the pivot, and the connecting rod is used for detachable connection with the two connecting side plates. A sliding baffle is provided between the two connecting side plates and on the side near the rotating shaft; The sliding baffle is configured to be elastically and slidably connected with the connecting side plate; The two connecting side plates are respectively provided with sliding guide grooves on the side near the rotating shaft; The sliding baffles are respectively movable and limited on the side near the sliding guide groove, passing through the sliding guide groove, and the sliding baffles are used to limit and block the ratchet teeth, thereby limiting the rotation of the ratchet.

[0006] Preferably, a sliding movable piece is connected to the middle of the end of the sliding baffle away from the rotating shaft; The other end of the sliding movable piece moves through the guide hole opened in the connecting limiting piece; The connecting limiting piece is used to connect with the connecting bottom piece, and the connecting bottom piece is used to connect with the two connecting side plates.

[0007] Preferably, a limiting spring is elastically sleeved on the sliding movable piece; One end of the limiting spring is used to connect with the sliding baffle, and the other end of the limiting spring is used to connect with the connecting limiting piece.

[0008] Preferably, the rotating handle bracket includes two symmetrically arranged side pieces; The two sides of the rotating handle frame near the rotating shaft are respectively provided with parallel and corresponding sliding grooves. A handle plate is provided between the two side plates on the side of the rotating handle frame near the rotating shaft. The two ends of the handle plate are respectively used for sliding and limiting and are inserted into the sliding grooves opened in the side plates of the rotating handle frame. The end of the handle piece near the latch ratchet is used to limit and abut against the latch ratchet teeth, thereby limiting the rotation of the latch ratchet.

[0009] Preferably, a limiting slot is provided in the middle of the handle piece; The handle piece is elastically reset to one of the two side pieces of the rotating handle frame via a torsion spring; The side plate of the rotating handle bracket for connection has a limiting boss structure. A torsion spring is used to elastically limit and lock onto the limiting boss structure. One end of the torsion spring is used for movable limiting and passes through the limiting slot opened in the middle of the handle plate to make limiting contact with the handle plate.

[0010] Preferably, the side plate of the rotating handle bracket away from the side for the elastic limiting torsion spring is provided with a limiting buckle; The limiting buckle is used to elastically rotate with the side piece on the side closest to the limiting buckle via a pin. A limiting buckle is used to connect the handle piece, which is located on the side panel closest to the limiting buckle and whose movement is limited by the groove in the side panel, to the side panel.

[0011] Preferably, a movable telescopic frame is provided at the end of the rotating handle frame away from the rotating shaft; The telescopic frame includes two movable sliding plates that correspond to the two side plates of the rotating handle frame and are telescopically movable. The two movable sliding plates are rotatably connected to a rotating handle at the ends away from the rotating handle bracket via a rotating pin. The side plate of the rotating handle bracket has a sliding limit groove at one end near the movable sliding piece, and the end of the movable sliding piece near the sliding limit groove is used for sliding limit and is inserted into the sliding limit groove.

[0012] Preferably, a sliding guide groove is provided on the side of the rotating handle frame near the movable sliding piece; The movable sliding piece is placed at one end of the sliding limiting groove and connected to a guide sliding block; A limiting guide rod is rotatably connected to the guide sliding block. The other end of the limiting guide rod moves through the sliding guide groove and through the limiting block, and a rotating head is connected to its end.

[0013] Preferably, limiting plates are connected to both sides of the end of the limiting block closest to the side plate; The side plate has a limiting groove, and the limiting piece is used to be movable and limited in the limiting groove. The bottom end of the limiting groove has several limiting and blocking protrusion structures. An elastic tension spring is provided between the rotating head and the limiting block. One end of the elastic tension spring is used to connect with the rotating head, and the other end of the elastic tension spring is used to connect with the limiting block.

[0014] The beneficial effects of this invention are as follows: The purpose of this invention is to provide a hand-operated puller, which is used in conjunction with a matching binding strap for securing and limiting cargo on a truck; this hand-operated puller is a further design improvement on the original design, through which: 1. It can achieve "telescopic adjustment", which can easily adapt to different environments and is convenient for human hand (grip, hold) operation, with flexible operating space; 2. The structural design is reasonable and can avoid loosening, thus preventing the binding from being unreliable. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the connection structure of a hand puller according to the present invention; Figure 2 This is an exploded view of the connecting structure of a hand-operated puller according to the present invention; Figure 3 This is a schematic diagram of the hand-operated movable frame connection structure of a hand-operated device according to the present invention; Figure 4This is an exploded schematic diagram of the connecting structure of the movable hand-operated frame of a hand-operated device according to the present invention; Figure 5 This is a schematic diagram of the rotating handle bracket connection structure of a hand-operated device according to the present invention; Figure 6 This is an exploded view of the rotating handle frame connection structure of a hand-operated device according to the present invention; In the diagram, 3-rotating shaft, 11-connecting rod, 12-connecting side plate, 13-sliding baffle, 14-connecting limiting piece, 21-side piece, 22-handle piece, 23-torsion spring, 24-limiting buckle, 31-crescent key, 32-buckle ratchet, 41-movable sliding piece, 42-limiting guide rod, 43-limiting block, 44-elastic tension spring, 131-sliding movable piece, 132-limiting spring, 141-connecting base piece, 411-rotating handle. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0017] like Figures 1 to 6 As shown, a hand-operated puller is used in conjunction with a matching binding strap for securing and limiting cargo on a truck. This hand-operated puller represents a further design improvement on an existing design. The improved puller includes a movable hand-operated frame. One end of the movable hand-operated frame is detachably connected to a connecting rod 11 for connecting the binding strap. The other end of the movable hand-operated frame is rotatably connected to a rotating handle frame via a rotating shaft 3 equipped with a crescent key 31. The opening of the crescent key 31 on the rotating shaft 3 allows the binding strap to pass through. Each end of the crescent key 31 on the rotating shaft 3 is equipped with a locking ratchet 32, which is used to lock and limit the movement of cargo within the openings of the crescent key 31 on the rotating shaft 3. These ratchet wheels rotate together with the rotating shaft 3. The openings of the crescent key 31 on the rotating shaft 3 are connected by limiting pins. The ratchet 32 ​​is used to limit and lock the ratchet 32 ​​into the opening of the crescent key 31 of the rotating shaft 3; the rotating handle frame includes two symmetrically arranged side plates 21; the two side plates 21 of the rotating handle frame near the rotating shaft 3 are respectively provided with parallel and corresponding sliding grooves; a handle plate 22 is provided between the two side plates 21 of the rotating handle frame near the rotating shaft 3, and the two ends of the handle plate 22 are respectively used to slide and limit the ratchet 32 ​​through the sliding grooves opened in the side plates 21 of the rotating handle frame; the end of the handle plate 22 near the ratchet 32 ​​is used to limit and abut against the locking teeth of the ratchet 32, and to limit the rotation of the ratchet 32.

[0018] In this embodiment, a matching binding strap (one of the straps) is installed on the connecting rod 11 of the pull arm of the hand-operated puller. The other end of the binding strap is wrapped around the cargo of the truck for a limiting binding, and the other end of the binding strap is wrapped around the rotating shaft 3 half a turn and passes through the opening in the middle of the crescent key 31 of the rotating shaft 3. Then, by manually controlling the rotating handle, the rotating shaft 3 is driven to rotate (note that the rotation arc range of the rotating shaft 3 is (0°, 300°). The rotation range of this design can also be designed with different rotation arc ranges). Under the limiting action of the crescent key 31, the rotating shaft 3 drives the two latch ratchet 32 ​​to rotate "clockwise". Each rotation causes the rotating shaft 3 to rotate "clockwise" at the crescent key 3. 1. This causes the binding strap to be "tightened" slightly. Furthermore, since the movable hand-operated frame is equipped with a flexible "sliding baffle" (to be further explained in the following embodiments), each time the rotating shaft 3 rotates (clockwise once) and stops, the sliding baffle is locked onto the teeth of the latch ratchet 32. Therefore, when the rotating handle frame rotates back to the "initial" position, the latch ratchet 32 ​​will not rotate with the rotating shaft 3 and return to the initial position. That is, each time the rotating shaft 3 rotates, it causes the binding strap, which is limited by the crescent key 31, to rotate once, thereby causing the binding strap to be "tightened" slightly. After repeated multiple times, the hand-operated device uses the binding strap to limit and tighten the cargo of the truck, preventing the cargo from falling off the truck's rack. After adjusting the binding straps, the rotating handle frame is then folded away (i.e., the pull-out frame and the rotating handle frame are folded together). The handle plate 22 is then positioned to stop the buckle on the teeth of the buckle ratchet 32, preventing the rotating shaft 3 (including the buckle ratchet 32) from "returning" and thus preventing the binding straps from loosening, which could lead to an unsecured binding and prevent the goods from falling off during transportation.

[0019] Furthermore, a movable telescopic frame is provided at the end of the rotating handle frame away from the rotating shaft 3; the movable telescopic frame includes two movable sliding plates 41 corresponding to the two side plates 21 of the rotating handle frame and telescopically movably arranged; the ends of the two movable sliding plates 41 away from the rotating handle frame are rotatably connected to the rotating handle 411 via rotating pins; a sliding limiting groove is provided at the end of the side plate 21 of the rotating handle frame near the movable sliding plate 41, and the end of the movable sliding plate 41 near the sliding limiting groove is used for sliding limiting and passing through the sliding limiting groove. A sliding guide groove is provided on the side plate 21 of the rotating handle frame near the movable sliding plate 41; a guide sliding block is connected to the end of the movable sliding plate 41 placed in the sliding limiting groove; a limiting guide rod 42 is rotatably connected to the guide sliding block, the other end of the limiting guide rod 42 movably passes through the sliding guide groove and movably passes through the limiting block 43, and a rotating head is connected to the end. Limiting plates are connected to both sides of the end of the limiting block 43 near the side plate 21; the side plate 41 has a limiting groove, and the limiting plates are used to move and limit within the limiting groove. Several limiting abutment structures are provided at the bottom of the limiting groove; an elastic tension spring 44 is provided between the rotating head and the limiting block 43. One end of the elastic tension spring 44 is used to connect to the rotating head, and the other end is used to connect to the limiting block 43. The reason for this design is that the position between the rotating handle frame and the movable telescopic frame can be adjusted as needed to adapt to different application scenarios and to facilitate the hand gripping and handling of the movable telescopic frame. Under the action of the half-moon key 31, the rotating shaft 3 drives the binding strap to "tighten"; after adjusting the position of the rotating handle frame and the movable telescopic frame, the limiting guide rod 42 is rotated to cause the limiting plates of the limiting block 43 to abut and lock into the gap between the "two" protrusion structures, thereby limiting the movable telescopic frame and preventing it from loosening and shifting during use, which would affect operation.

[0020] Furthermore, the manual movable frame includes two symmetrically arranged connecting side plates 12. A connecting rod 11 for connecting the binding strap is located at the end of the two connecting side plates 12 away from the rotating shaft 3, and the connecting rod 11 is used for detachable connection with the two connecting side plates 12. A sliding baffle 13 is provided between the two connecting side plates 12 and on the side closer to the rotating shaft 3. The sliding baffle 13 is used for elastic sliding connection with the connecting side plates 12. At the same time, sliding guide grooves are respectively opened on the side of the two connecting side plates 12 near the rotating shaft 3. The sliding baffle 13 passes through the sliding guide groove on the side closer to the sliding guide groove and is used to limit and abut against the teeth of the buckling ratchet 32, thereby limiting the rotation of the buckling ratchet 32. A sliding movable piece 131 is connected to the middle of the end of the sliding baffle 13 away from the rotating shaft 3; the other end of the sliding movable piece 131 movably passes through the guide hole opened in the connecting limiting piece 14; the connecting limiting piece 14 is used to connect with the connecting base piece 141, and the connecting base piece 141 is used to connect with the two connecting side plates 12. A limiting spring 132 is elastically sleeved on the sliding movable piece 131; one end of the limiting spring 132 is used to connect with the sliding baffle 13, and the other end of the limiting spring 132 is used to connect with the connecting limiting piece 14.

[0021] In this embodiment, when the rotating shaft 3 is driven to rotate, under the limiting action of the half-moon key 31, the two latching ratchet wheels 32 rotate clockwise. Each rotation causes the shaft 3 to tighten the strap slightly at the half-moon key 31. With each clockwise rotation of the latching ratchet wheels 32, the two ends of the sliding baffle 13 elastically limit and abut against the teeth of the latching ratchet wheels 32 on their respective sides, preventing the ratchet wheels 32 from retracting. Therefore, by repeatedly rotating the handle to drive the rotating shaft 3, the strap can be tightened without retraction. When it is necessary to loosen the strap (unload), simultaneously pull the handle piece 22 away from the teeth of the latching ratchet wheels 32 and pull the sliding baffle away from the teeth of the latching ratchet wheels 32 to pull the strap out from the half-moon key 31 of the rotating shaft 3.

[0022] Furthermore, a limiting groove is provided in the middle of the handle piece 22; the handle piece 22 is elastically reset connected to one of the two side pieces 21 of the rotating handle frame via a torsion spring 23; the side piece 21 of the rotating handle frame for connection is provided with a limiting boss structure, the torsion spring 23 is used to elastically limit and lock onto the limiting boss structure, and one end of the torsion spring 23 is used to move through the limiting groove provided in the middle of the handle piece 22 for limiting contact with the handle piece 22. When it is necessary to further limit the rotation shaft 3 (prevent the rotation shaft 3 from rotating back), the two ends of the handle piece 22 are respectively limited and blocked on the teeth of the (two) latch ratchet 32 ​​to prevent the rotation shaft 3 from rotating back; when it is necessary to loosen the strap (unload), simultaneously pull the handle piece 22 "away" from the teeth of the latch ratchet 32 ​​and pull the sliding baffle "away" from the teeth of the latch ratchet 32 ​​to pull the strap out from the crescent key 31 of the rotation shaft 3.

[0023] Furthermore, a limiting buckle 24 is provided on the side plate away from the elastic limiting torsion spring 23 of the rotating handle bracket; the limiting buckle 24 is elastically rotatably connected to the side plate 21 near the limiting buckle 24 via a pin; the limiting buckle 24 is used to limit the connection between the handle piece 22 near the limiting buckle 24 and the side plate 21, which is movably limited and passes through the slide groove of the side plate 21. That is, by "hooking (locking)" the limiting buckle 24 at the end position of the handle piece 22 on this side, the handle piece 22 is further "limited", thereby firmly limiting the handle piece 22 in the locking position of the two buckle ratchet 32, preventing the rotating shaft 3 from rotating backward.

[0024] Ultimately, the improved hand strap not only achieves "telescopic adjustment" to adapt to different environments and facilitates manual operation with flexible operating space, but also has a reasonable structural design that prevents loosening and ensures secure binding.

Claims

1. A hand-operated device, comprising a movable hand-operated frame, characterized in that, One end of the manual movable frame is detachably connected to a connecting rod for connecting a binding strap, and the other end of the manual movable frame is rotatably connected to a rotating handle frame via a pivot with a half-moon key, and the opening of the half-moon key on the pivot is for the binding strap to pass through. The two ends of the half-moon key of the rotating shaft are respectively provided with a snap-lock ratchet. The snap-lock ratchet is used to limit and lock in the two ends of the half-moon key of the rotating shaft and rotates together with the rotating shaft. The two ends of the half-moon key of the rotating shaft are respectively connected by a limit pin, which is used to limit and lock the snap-lock ratchet in the opening of the half-moon key of the rotating shaft. The manual movable frame includes two symmetrically arranged connecting side plates. A connecting rod for connecting the binding strap is located at the end of the two connecting side plates away from the pivot, and the connecting rod is used for detachable connection with the two connecting side plates. A sliding baffle is provided between the two connecting side plates and on the side near the rotating shaft; The sliding baffle is configured to be elastically and slidably connected with the connecting side plate; The two connecting side plates are respectively provided with sliding guide grooves on the side near the rotating shaft; The sliding baffles are respectively movable and limited on the side near the sliding guide groove, passing through the sliding guide groove, and the sliding baffles are used to limit and block the ratchet teeth, thereby limiting the rotation of the ratchet.

2. A hand-operated puller according to claim 1, characterized in that, A sliding movable piece is connected to the middle of the end of the sliding baffle away from the rotating shaft; The other end of the sliding movable piece moves through the guide hole opened in the connecting limiting piece; The connecting limiting piece is used to connect with the connecting bottom piece, and the connecting bottom piece is used to connect with the two connecting side plates.

3. A hand-operated puller according to claim 2, characterized in that, A limiting spring is elastically sleeved on the sliding movable piece; One end of the limiting spring is used to connect with the sliding baffle, and the other end of the limiting spring is used to connect with the connecting limiting piece.

4. A hand-operated puller according to claim 1, characterized in that, The rotating handle bracket includes two symmetrically arranged side plates; The two sides of the rotating handle frame near the rotating shaft are respectively provided with parallel and corresponding sliding grooves. A handle plate is provided between the two side plates on the side of the rotating handle frame near the rotating shaft. The two ends of the handle plate are respectively used for sliding and limiting and are inserted into the sliding grooves opened in the side plates of the rotating handle frame. The end of the handle piece near the latch ratchet is used to limit and abut against the latch ratchet teeth, thereby limiting the rotation of the latch ratchet.

5. A hand-operated puller according to claim 1, characterized in that, A limiting slot is provided in the middle of the handle piece; The handle piece is elastically reset to one of the two side pieces of the rotating handle frame via a torsion spring; The side plate of the rotating handle bracket for connection has a limiting boss structure. A torsion spring is used to elastically limit and lock onto the limiting boss structure. One end of the torsion spring is used for movable limiting and passes through the limiting slot opened in the middle of the handle plate to make limiting contact with the handle plate.

6. A hand-operated puller according to claim 5, characterized in that, The side plate of the rotating handle bracket away from the side used for the elastic limiting torsion spring is provided with a limiting buckle; The limiting buckle is used to elastically rotate with the side piece on the side closest to the limiting buckle via a pin. A limiting buckle is used to connect the handle piece, which is located on the side panel closest to the limiting buckle and whose movement is limited by the groove in the side panel, to the side panel.

7. A hand-operated puller according to claim 6, characterized in that, A movable telescopic frame is provided at the end of the rotating handle frame away from the rotating shaft; The telescopic frame includes two movable sliding plates that correspond to the two side plates of the rotating handle frame and are telescopically movable. The two movable sliding plates are rotatably connected to a rotating handle at the ends away from the rotating handle bracket via a rotating pin. The side plate of the rotating handle bracket has a sliding limit groove at one end near the movable sliding piece, and the end of the movable sliding piece near the sliding limit groove is used for sliding limit and is inserted into the sliding limit groove.

8. A hand-operated puller according to claim 7, characterized in that, The side plate of the rotating handle bracket has a sliding guide groove on the side near the movable sliding plate; The movable sliding piece is placed at one end of the sliding limiting groove and connected to a guide sliding block; A limiting guide rod is rotatably connected to the guide sliding block. The other end of the limiting guide rod moves through the sliding guide groove and through the limiting block, and a rotating head is connected to its end.

9. A hand-operated puller according to claim 8, characterized in that, Limiting plates are connected to both sides of the end of the limiting block closest to the side plate; The side plate has a limiting groove, and the limiting piece is used to be movable and limited in the limiting groove. The bottom end of the limiting groove has several limiting and blocking protrusion structures. An elastic tension spring is provided between the rotating head and the limiting block. One end of the elastic tension spring is used to connect with the rotating head, and the other end of the elastic tension spring is used to connect with the limiting block.

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