JP3033283U - Ratchet buckle used to tighten the belt - Google Patents

Abstract

(57) [PROBLEMS] To obtain sufficient strength for a main body and a handle, to reduce accidental release of load at a final closed position, to facilitate holding of a ratchet drive lever, and further, a sliding direction of the ratchet drive lever. Can be stabilized,
Provides a ratchet buckle for tightening the belt. SOLUTION: A main body 1 having a pair of parallel arms 1a and 1b, which is a plate passed between the arms, and a winding shaft 7 composed of two plates supported between the arms, A pair of parallel arms 2a and 2b, a plate passed between the arms, a handle 2 made of plastic grips 10 and 11, a body arm 1a and 1b and a handle arm 2a and 2b on a winding shaft 7. A pair of ratchet wheels 5, a ratchet 3 for fixing the ratchet wheel 5 so as not to rotate, and a ratchet drive lever 4 for rotating the ratchet wheel 5 for winding a belt.

Description

[Detailed description of the invention]

[0001]

TECHNICAL FIELD The present invention relates to tightening of a belt by a ratchet device using a safety device for holding an object in a tensioned state in order to hold the object in a desired position. It relates to the ratchet buckle used.

[0002]

2. Description of the Related Art In a conventional ratchet buckle used for tightening a belt, as described in U.S. Pat. No. 4185360, the main body and the arm of the handle are composed of independent parts. It is joined by a take-up shaft, a horizontal bar, and a grip. In addition, a safety protrusion is made at the bottom of the handle to make contact with the notch of the ratchet and fix the engagement between the ratchet and the ratchet wheel to prevent reverse rotation of the winding shaft when the handle is in the final closed position. It is preventing. Furthermore, when releasing the tightening of the belt, the ratchet drive lever is pulled and the handle is rotated nearly 180 degrees from the main body, but the lever end is bent vertically to make a handle. Further, the spring device of the ratchet drive lever uses a torsion spring.

However, in the conventional device having such a structure, although the arms of the main body and the handle are subjected to a considerable tensile load from the belt, each of the two arms is independent, and therefore the strength against the load is high. Is weak. Furthermore, since the ratchet has a notch, the strength of the ratchet becomes low against the load for fixing the ratchet wheel, which was originally intended.

Further, in the conventional device, since the handle of the ratchet drive lever is small, it is considered that the lever is difficult to hold when the load is released when a high load is applied. Further, since the twist spring is used. Moreover, it becomes difficult for the ratchet drive lever to slide perpendicularly to the winding shaft, and it becomes difficult to receive the load evenly from the left and right ratchet wheels.

[0005]

Therefore, the object of the present invention is to obtain sufficient strength for the main body and the handle, to increase the strength of the ratchet, and to reduce the false release of the load at the final closed position, Another object of the present invention is to provide a ratchet buckle used for tightening the belt, which makes it easier to hold the handle of the ratchet drive lever and release the load, and also stabilizes the sliding direction of the ratchet drive lever.

[0006]

Means for Solving the Problems Hereinafter, referring to the reference numerals in the accompanying drawings, a ratchet buckle used for tightening a band according to the present invention is provided between a pair of parallel arms 1a and 1b and an arm. Main body 1 which constitutes a frame by one plate made of a plurality of plates, a winding shaft 7 constituted by two plates 7a and 7b supported between arms, and a pair of parallel arms 2a and 2b and arms The handle part 2 that constitutes a frame with a single plate that is passed between them, the handle 2 that includes the plastic grips 10 and 11, the main body arms 1a and 1b on the winding shaft 7, and the handle arms 2a and 2b. A pair of ratchet wheels 5a and 5b fixed respectively between them, a ratchet 3 for engaging the ratchet wheel 5 in a non-rotating manner, and a ratchet for winding the belt. Ratchet drive lever 4 for rotating the ratchet wheel 5.

Further, in the present invention, the main body 1 and the handle 2 and the winding shaft 7 are independent from each other in rotation, the winding shaft 7 and the ratchet wheel 5 are fixed and rotate simultaneously, and the ratchet 3 is connected to the main body arm 1 a and the ratchet wheel 5. 1b is slidable on the slot provided in 1b and pressed against the ratchet wheel 5 by the ratchet spring 14, and the ratchet drive lever 4 is slidable on the slot provided in the handle arms 2a and 2b. The ratchet wheel 5 is pushed by the ratchet drive lever 5 and the ratchet wheel 5 are engaged with each other to drive the winding shaft 7 to wind the belt, and the ratchet 3 and the ratchet wheel 5 are engaged to wind the belt. Prevents reverse rotation of the take-up shaft 7. Further, locking holes 3c are formed at both ends of the ratchet 3, and the protrusions of the handle arms 2a and 2b are provided at two positions 2c and 2d to enhance safety at the final closed position and reduce accidental release of load.

In the ratchet buckle used for tightening the belt, when the handle 2 is lifted from the main body, the ratchet drive lever 4 and the ratchet wheel 5 engage with each other to drive the winding shaft 7 to wind the belt. Next, when the handle 2 is lowered to the main body, the ratchet 3 and the ratchet wheel 5 engage with each other to prevent the winding shaft 7 from rotating in the reverse direction.

When the handle 2 is in the final tightened position as shown in FIG. 1 when the belt is further wound up and is in the maximum tightening state, the safety protruding portions 2c of the main body 2 are inserted into the locking holes 3c formed at both ends of the ratchet 3. The ratchet outer surface 3d and the tip surface 2d of the safety protruding portion are in contact with each other to prevent the ratchet 3 from being released from the engagement with the ratchet wheel 5.

Further, ribs are provided at three places near the bridging plate of the handle 2 and the grips 10, 11 of the handle arms 2a, 2b to enhance the strength against the force generated in the handle when the band is tightened. There is.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION In the embodiment shown in FIGS. 1 to 5, a main body 1 has a frame composed of a pair of parallel arms 1a and 1b and a plate provided between the arms. There is. The winding shaft 7 is composed of two plates 7a and 7b supported between the arms, and is connected at both ends by a shaft crimping plate 8 and a shaft cap 13 and fixed by a hollow stud 16. The winding shaft 7 is mounted so as to be rotatable on the body arms 1a and 1b. A pair of ratchet wheels 5a and 5b are fixed to the outside of the body arms 1a and 1b on the take-up shaft 7, respectively, and the ratchet wheel 5 has a belt wound between both plates 7a and 7b of the take-up shaft 7. Prevent rewind.

The slots made in the body arms 1a and 1b are for the operation of the ratchet 3 installed therein. The ratchet 3 has a pair of arm portions 3a and 3b, and a locking hole 3c is provided at a position overlapping the protruding portion 2c of the handle. The ratchet 3 is slidable by a spring 14. The spring 14 has one end in contact with the blanket on the main body and the other end in contact with the ratchet 3. This spring engages and locks the ratchet arms 3a and 3b against the ratchet wheel except when the handle 2 is lifted from the body 1.

The handle 2 is lifted up with respect to the main body 1, then the band is lowered, and the band is wound around the winding shaft 7. The bolt 17 and the nut 18 are attached and fixed over the body arms 1a and 1b, for example, to fix the belt to the wall of the bed of the car.

The handle 2 comprises a frame made of a pair of parallel arms 2 a and 2 b and a plate provided between the arms, and a plastic grip 10 and 11 is fixed to the handle via a grip plate 9. Has been done. These arms 2a and 2b are rotatably supported between the ratchet wheel 5 and the shaft caulking plate 8.

A ratchet drive lever 4 is installed in the slots formed in the handle arms 2a and 2b. The ratchet drive lever 4 is formed with a pair of arms 4a and 4b, and a plastic lever 13 is fixed in the direction opposite to the ratchet wheel. The ratchet drive lever 4 is slidable by a spring 15. One end of the spring 15 is in contact with the blanket protruding from the handle passing plate, and the other end is in contact with the ratchet drive lever 4. This spring engages the ratchet arms 3a and 3b with the ratchet wheel when the handle 2 is lifted from the main body 1 and drives the ratchet wheel 5 to rotate the winding shaft 7 to wind the band. Further, the plastic lever 13 has the handle 2 to facilitate the movement of the hand with respect to the main body 1.

The protrusions 2c and 2d formed on the lower portion of the handle are formed on the handle arms 2a and 2b. The two projections each have a camming surface when the handle 2 is in the final closed position. During the work, the belt is pulled and wound by the handle 2 which moves up and down with respect to the main body 1. Then, as shown in FIG. 4, the ratchet drive lever 4 rotates the ratchet wheel 5 as the handle 2 moves up. The ratchet 3 holds the ratchet wheel 5 in its position when the handle 2 is lowered over the arched portion of the teeth of the ratchet wheel 5. When the maximum tension is reached, the handle 2 is lowered to the closed (locked) position as shown in FIG. When the lever comes to this position, the tip surfaces 2c and 2d of the two safety projections come close to the locking holes 3c of the ratchet 3 and the ratchet outer surface 3d, and the ratchet arms 3a and 3b engage and are fixed to the ratchet wheel. It Once in this position, the safety projection prevents the ratchet 3 from leaving its engaged position with respect to the ratchet wheel even under high vibrations and cyclic tension changes.

[0017]

As described above, in the ratchet buckle used for tightening the belt according to the present invention, the frame structure of the main body and the handle are integrated respectively, and in particular, the handle is provided with ribs at three positions, which is sufficient. It is possible to obtain a sufficient strength, and therefore, it is possible to increase the allowable load from the band applied to the frame.

Further, in the ratchet buckle used for tightening the band of the present invention, the area of the ratchet is expanded, the locking holes are opened at both ends of the ratchet, and the protrusions of the handle are provided at two places, so that the strength of the ratchet is increased. , The false release of load in the final closed position can be reduced.

Further, in the ratchet buckle used for tightening the belt according to the present invention, the handle of the ratchet drive lever is made of plastic parts, which facilitates the operation of releasing the load, thus improving the operability. You can

[Brief description of the drawings]

FIG. 1 is a front view of a ratchet buckle according to an embodiment of the present invention.

FIG. 2 is a bottom view of the ratchet buckle.

FIG. 3 is a rear view of the ratchet buckle.

FIG. 4 is a front view of the ratchet buckle in a handle operating state.

5 is a view of the ratchet buckle A- in FIG.
It is an A'horizontal sectional view.

[Explanation of symbols]

 1 main body 2 handle 3 ratchet 4 ratchet drive lever 5 ratchet wheel 6 washer 7 winding shaft 8 shaft crimping plate 9 grip plate 10 grip A 11 grip B 12 plastic lever 13 shaft cap 14 ratchet spring 15 spring 16 hollow stud 17 bolt 18 nut

Claims (2)

[Utility model registration claims] 1. A main body 1 having a pair of parallel arms 1a and 1b, which is a plate passed between the arms, and a winding shaft 7 composed of two plates supported between the arms. , A pair of parallel arms 2a and 2b, a plate passed between the arms, a handle 2 made of plastic grips 10 and 11, a body arm 1a and 1b, and a winding shaft 7 between the handle arms 2a and 2b. It consists of a pair of ratchet wheels 5 on the top, a ratchet 3 for fixing the ratchet wheel 5 so that it does not rotate, and a ratchet drive lever 4 for rotating the ratchet wheel 5 to wind a belt. The winding shaft 7 and the ratchet wheel 5 are fixed and rotate at the same time, and the ratchet 3 rotates the main body arms 1a and 1a. the ratchet drive lever 4 is slidable on the slot provided in b, the ratchet drive lever 4 is slidable on the slot provided in the handle arms 2a and 2b, and the ratchet drive lever 4 and the ratchet wheel 5 are engaged with each other. The winding shaft 7 is driven to wind the belt by the ratchet 3 and the ratchet wheel 5
A ratchet buckle used for tightening a belt, which prevents reverse rotation of the winding shaft 7 by engaging with each other. 2. Locking holes 3c are formed at both ends of the ratchet 3, and the projecting portions of the handle arms 2a and 2b are provided with 2c and 2c.
The ratchet buckle used for tightening the belt according to claim 1, wherein the safety at the final closed position is increased as two positions of d and the false release of the load is further reduced.