JPS6113794Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a load tightening device used for tightening a belt between an article and a fixing point, or for tightening a belt wrapped around an article.

The present applicant has provided a cargo fastener disclosed in Utility Model Publication No. 1987-20487 as this type of cargo fastener. The main body of this load tightening tool consists of three parts: a hook connecting metal fitting to which one hook is connected, a lever, and a body.By rotating the lever relative to the body, the hook connecting metal fitting It is designed to pull in or release the load, thereby tightening or releasing the load.

However, the load fastening device having the above structure has the drawback that it has many parts and is large in size.

The present invention was developed in view of the drawbacks of the conventional load tightening devices mentioned above.By configuring the load tightening body with two parts: a body that also serves as a hook connection fitting, and a lever, the number of parts can be reduced and the structure The purpose of the present invention is to provide a load tightening device with a new structure that is smaller in size.

The present invention will be described in detail below with reference to the illustrated embodiments.

In each figure, 6 is a load tightening main body, which consists of a body 7 and a lever 8.

The body 7 has a pair of side walls 7a and 7b each having a hook shape when viewed from the front (FIG. 2). The shaft 7c and a belt winding shaft 7d located on the right side are connected at a predetermined interval. Each end 7g of the pair of side walls 7a, 7b
are bent toward each other, and are rotatably connected by a pin 3 with the connecting end of one hook 1 in between.

The lever 8 has a pair of long side walls 8a and 8b, each of which has a slightly wider base 8f when viewed from the front. The base portion 8f is also connected at the tip end thereof by a belt pushing shaft 8c. And this lever 8 is connected to the body 7,
The base 8f of each side wall 8a, 8b is arranged so as to fit from the outside of one end 7h of each side wall 7a, 7b of the body 7, and the opposing side walls 7a and 8a; 7b
and 8b are rotatably connected by ear shafts 9a and 9b, respectively.

A belt 10 is wound around the belt winding shaft 7d of the body 7 and the belt pushing shaft 8c of the lever 8. As shown in FIG. 6, the belt 10 is wrapped around the belt 10 in a double manner by wrapping it around the belt winding shaft 7d as well.
Both ends of the belt are led out from the load tightening body 6 by wrapping around the belt.

Another hook 2 is connected to one end of the belt 10 via a connecting fitting 5 and a pin 4, and a stopper 11 is connected to the other end to prevent the belt from slipping off.

The body 7 and the lever 8 each have a mechanism for maintaining the load tightening state, as shown in FIG. 6, for example. That is, the body 7 has its respective side walls 7a, 7b.
The lever 8 has a protrusion 7e projecting inward at one end, and the lever 8 has a circular hole 8e on each side wall 8a, 8b thereof corresponding to the protrusion 7e. While it is fitted and locked into the circular hole 8e, the fitting between the two is released when the load is released.

The load tightening release state of the load tightening tool having the above structure is as shown in FIG. That is, the lever 8 is connected to the body 7.
In contrast, it is tilted to the left in the figure, and both side walls 7a, 7b abut against the reinforcing shaft 7c, and the belt pushing shaft 8c is located on the lower right side with respect to each of the ear shafts 9a, 9b.

Place the lever 8 against the body 7 and the ear shafts 9a, 9b.
When the load is rotated in the direction of arrow X from the unfastened state shown in FIG. 9 around , the load is tightened as shown in FIG.
That is, the belt pushing shaft 8c is connected to each ear shaft 9a, 9b.
located on the upper left side of the body and on each side wall 7 of the body.
The lever 8 is in contact with the valley portion 7f of the lever 8, and the tip of the bottom wall 8d of the lever 8 is in contact with the belt 10. Thus, the belt 10 is tightened by the amount of rotational movement of the belt pushing shaft 8c around each of the ear shafts 9a, 9b.

In the load tightening state shown in Fig. 6, the belt pushing shaft 8c
is located on the upper left side of each ear shaft 9a, 9b in the figure, so the tension applied to the belt 10 always tends to rotate the lever 8 in the load tightening direction. When the load is tightened, the protrusions 7e of the side walls 7a and 7b of the body are fitted into the circular holes 8e of the side walls 8a and 8b of the lever, so external forces such as vibrations are applied to the load tightener in use. Even if the lever 8 is applied, it is prevented that the lever 8 is easily released automatically.

Incidentally, on the circumferential surface of the belt pushing shaft 8c, knurling is formed in a twill pattern and each protrusion has a sharp tip. The coarseness of this knurling is
It is largely related to the coefficient of friction with respect to the belt 10, and according to experiments, the coefficient of friction is largest when it is about 1 to 2 times the length of one thread in the longitudinal direction of the belt 10. By providing knurling on the push-in shaft 8c in this way, each of the protrusions bites into the threads and eyes of the belt 10, so that the push-in shaft 8c due to tension and relaxation repeatedly applied to the belt 10 during use.
This prevents the belt 10 from loosening at this portion.
If the knurling is too coarse, the protrusions will not cut into the belt 10, and if the knurling is too fine, it will cause clogging or will only cut into the surface of the belt 10 shallowly, which is undesirable in either case. Appropriate. Preventing the belt 10 from loosening is a major factor affecting the quality of a load fastener.
What is important here is that by carving a knurling on the belt contact surface, the coefficient of friction between the knurling and the part 10c of the belt that comes into contact with it is lower than that of the part 10c of the belt and the other part 10b of the belt that overlaps with the knurling. The objective is to make the coefficient of friction greater than the coefficient of friction between the In this way, when the belt 10 of the load fastener in use is repeatedly stretched and loosened, when the belt 10 is loosened, the outer portion 10b of the belt moves toward the winding shaft 7d together with the inner portion 10c of the belt. Even under such force, the inner portion 10c of the belt 10 will not slide on the knurled surface, and therefore, even under the above circumstances, the belt 10 will not loosen and will reliably maintain the load tightening state. be able to.

The present invention is not limited to the above embodiments, but can be implemented in various other ways.

For example, when the lever 8 is connected to the body 7, each side wall 8a, 8b of the lever 8 is connected to each side wall 7a, 8b of the body 7.
7b, so that both side walls 8a, 8b of the lever 8 come into contact with the belt winding shaft 7d during load tightening.

As is clear from the detailed description of the examples above,
According to the present invention, the load tightening main body is made up of two parts: the body and the lever.
It can be constructed with fewer parts, and
Since the belt winding shaft is provided separately on the body side, and the belt pushing shaft is provided on the lever side, the structure of the body and lever is simple and compact, and the load tightening body made of the combination of these is The load fastening device can be configured to be simple and compact, and the intended purpose can be achieved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, with first, second,
3, 4, and 5 are a plan view, a front view, a bottom view, a left side view, and a right side view, respectively, of the load tightening device in the load tightening state, and FIG. 6 is a sectional view taken along line A-A in FIG. 8 are an end view cut along the line C-C and a cut end view taken along the line B-B of FIG. 2, respectively, and FIG. 9 is a cross-sectional view of the main part corresponding to FIG. 6 of the load tightening device in the load tightening release state. It is. 1, 2...Hook, 3, 4...Pin, 5...Connection fittings, 6...Loading body, 7...Body, 7a,
7b...Side wall, 7c...Reinforcement shaft, 7d...Wrap shaft, 7e...Engagement protrusion, 7f...Trough, 7g, 7
h...End part, 8...Lever, 8a, 8b...Side wall, 8c...Pushing shaft, 8d...Connection part, 8e...
Circular hole, 8f...base, 9a, 9b...ear shaft, 10
... Belt, 10a ... Belt end, 11 ... Stopper.

Claims (1)

[Scope of utility model registration request] The load tightening main body 6 is composed of a body 7 and a lever 8, and the body 7 is provided with a pair of opposing side walls 7a, 7b, and each side wall 7a,
A belt winding shaft 7d is provided between one end 7h of 7b, and a hook 1 is connected to the other end, and
The lever 8 has a pair of opposing side walls 8a and 8b.
and a base 8 of each side wall 8a, 8b.
A belt pushing shaft 8c is provided between f, and the lever 8
are the side walls 8 of the lever 8 relative to the body 7.
a, 8b are arranged so as to be located on the outside or inside of each side wall 7a, 7b of the body 7, and the base 8f of each side wall 8a, 8b of the lever 8 and the body 7
One end 7h of each side wall 7a, 7b is connected to the ear shaft 9a, respectively.
The belt 10 is rotatably connected to the belt 9b.
is wound around the belt winding shaft 7d and led out of the load tightening body 6 via the belt pushing shaft 8c, and one hook 2 is connected to one end of the belt, and the lever 8 is rotated with respect to the body 7. A load tightening tool characterized in that the belt 10 is tightened or released by moving the belt pushing shaft 8c around the ear shafts 9a and 9b.