JPH0334489Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a belt tightener used to prevent movement of the article by tightening the belt between an article and a fixed structure, or to tighten a belt wrapped around the article. It is an object of the present invention to provide a new belt fastener that can be tightened and released with a simple operation, and that does not cause the belt to loosen or become unfastened in the tightened state. It is something.

Conventionally, as this type of belt tightener, an operating lever is rotatably supported on the main body by a lever rotating shaft, a hook mounting bracket is rotatably supported on the operating lever, and a belt is attached to the operating lever. a winding shaft is provided, one end of the belt is inserted from the rear of the main body, passed under the operating lever rotation shaft, wound around the belt winding shaft, passed between the belt and the lever rotation shaft, and pulled out rearward; It is known that a belt is wound around the lever rotating shaft and tightened by rotating the operating lever backwards.

As an example of a belt fastener with this structure,
For example, the one described in Utility Model Publication No. 55-10054 is known. However, in this device, the operating lever and the hook attachment fitting are supported by a through shaft, and the through shaft is extremely obstructive in terms of the structure and function of the belt fastener. In other words, when the belt extending backward from the lever rotation shaft hits the threading shaft, the tension of the belt pushes up the operating lever and releases the tightening, so it is necessary to wrap the belt around the lever guide shaft and make a detour. Not only is this complicated, but unnecessary force is applied to the belt when it is tightened, making it more susceptible to damage.

Other examples include those described in US Pat. No. 2,867,406 and US Pat. No. 3,050,799.
In this device, the operating lever and the hook mounting bracket are connected to each other at their respective side plates, and there is no through shaft, so this mechanism does not interfere with the structure or function, and the belt can be easily attached. Since there is no need to make a detour, the structure is simple, no unnecessary force is applied to the belt and it is not damaged, and the operation is simple and extremely excellent.

However, in this mechanism, the operating lever and the hook mounting bracket are only connected by a coupling shaft between the side plates, so when force is applied to the hook mounting bracket during a tightening operation, the coupling shaft bends. may not rotate smoothly. In particular, the inner end of the coupling shaft often hits the outer periphery of the side plate of the main body, making it impossible to rotate. In addition, since it is necessary to form a head to prevent the coupling shaft from coming off at the inner end, it is necessary to provide a sufficient distance between the side plate of the operating lever and the side plate of the main body, which creates play and prevents smooth rotation. The disadvantage is that it is difficult to obtain

The present invention has been developed in view of the above circumstances, and includes an improved belt tightening device of the above-mentioned mechanism, in which the operating lever and the hook mounting bracket are rotatably connected by a connecting shaft between the respective side plates. , the coupling shaft is prevented from bending due to the tensile force of the belt, and its rotation can be performed smoothly.

Therefore, in the present invention, an operating lever is rotatably supported on the main body by a lever rotating shaft, a hook mounting bracket is rotatably supported on the operating lever, and a belt is wound around the operating lever. a shaft is provided, one end of the belt is inserted from the rear of the main body,
Pass it under the lever rotating shaft, wrap it around the belt wrapping shaft, pass between the belt and the lever rotating shaft, pull it out backwards, and rotate the operating lever backward to wrap the belt around the lever rotating shaft. In a belt tightener that is tightened by
The main body and the operating lever each have side plates on both sides, the lever rotating shaft is suspended between the side plates, and the attachment portion of the hook mounting bracket on both side plates of the operating lever is squeezed outward. A bulge is formed, and both side plates of the operating lever are separately coupled to the hook mounting bracket by coupling shafts at the bulge, and the inner end of the coupling shaft is accommodated inside the bulge. When the operating lever rotates to tighten the belt, at least a portion of the head of the coupling shaft is always in a position where it can come into contact with an outer surface of the side plate of the main body. , forming a stepped portion on the outer periphery of the side plate of the main body, which abuts on the belt winding shaft when the operating lever is rotated to tighten the belt;
A presser shaft is suspended between the rear ends of the side plates of the main body, and the belt passes under the presser shaft.

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show an embodiment of the present invention. In the figure, 1 is a main body, and the main body 1 consists of a bottom plate 2 and side plates 3 erected on both side edges of the bottom plate 2, and a presser shaft 4 is attached to the rear end of the side plate 3.
is constructed, and a locking hole 5 is bored in the upper part of the center part. The front end of the side plate 3 is formed with a bearing part 6 that bulges upward, a stepped part 7 is formed on the rear outer periphery of the bearing part 6, and a lever rotation shaft is formed slightly in front of the center of the bearing part 6. 8 is rotatably installed, and the outer peripheral surface of the lever rotation shaft 8 is knurled. Further, the lower end of the bearing portion 6 is formed with a bulge 9 that protrudes below the bottom surface of the bottom plate 2 .

10 is an operating lever. The operating lever 10
consists of a cover plate 11 and side plates 12 hanging down from both side edges of the cover plate 11, and the side plates 12 have an elongated approximately triangular shape with a wide belt fixing part 13 at the front. At the top of the front end of the
Both ends of the lever rotation shaft 8 protruding from the side plate 3 of the main body 1 are fixed, and the lever 10 is rotatably supported on the main body 1 about the lever rotation shaft 8.

A belt winding shaft 14 is suspended between the side plates 12 at the rear of the lever rotation shaft 8.
When the belt is rotated rearward, the belt winding shaft 14 can come into contact with the stepped portion 7 of the main body 1. In addition, a side plate 12 is provided at the bottom of the belt fixing part 13.
A bulging portion 15 is formed which is squeezed outward. Furthermore, a locking protrusion 16 is squeezed out from the front lower part of the side plate 12 so that it can be locked into the locking hole 5 of the main body 1.

Reference numeral 17 denotes a hook mounting bracket having a hook 18 rotatably supported at its front end, and includes a pair of side plates 1
9 is bent, and the front part has a narrow interval and is pivotally supported by a pin 20 with the control device 18 in between, and the rear part has a wide interval and is connected to the bulging part 15 of the operating lever 10 by a connecting shaft 21. It is rotatably supported on the shaft. 22 is a reinforcing shaft installed between the side plates 19.

As shown in FIG. 4, the coupling shaft 21 has a head 23 at its inner end, and the head 23 is accommodated inside the bulge 15 of the side plate 12 of the operating lever 10.
The top surface of the head 23 is substantially flush with the inner surface of the side plate 12. Thus, the operating lever 10 is connected to the main body 1.
When the coupling shaft 21 rotates relative to the lever rotation shaft 8
At that time, the coupling axis 2
At least a part of the head 23 of the main body 1 is in a position where it can constantly come into contact with the outer surface of the bearing part 6 of the main body 1.

24 is a belt. One end of the belt 24 is
It is inserted from the rear of the main body 1 and passes under the presser shaft 4, passes under the lever rotation shaft 8, is wound around the belt winding shaft 14, and is further passed between the lever rotation shaft 8 and the belt 24. It passes under the presser shaft 4 and is pulled out above the belt 24. Further, a hook (not shown) is attached to the other end of the belt 24, if necessary.

Next, the operation of the belt fastener of the present invention will be explained.
FIG. 3 shows the belt release state in which the operating lever 10 of this belt tightener is rotated forward with respect to the main body 1. In this state, the belt winding shaft 14 is located in front of the lever rotating shaft 8, and the belt 24 can freely move in and out of the belt tightener, and the length of the belt 24 can be freely adjusted.

Then, the hook 18 and the hook attached to the other end of the belt 24 are locked to the article to be fixed and a predetermined structure, and the length of the belt 24 is adjusted so that the belt 24 is in a substantially taut state. do. When the operating lever 10 is rotated backward in this state, the belt winding shaft 14 is rotated forward from above the lever rotation shaft 8, and the belt 2 passing under the lever rotation shaft 8 is rotated forward.
The four parts are wrapped around the lever rotation shaft 8, and the lever rotation shaft 8 moves forward of the coupling shaft 21, and the belt 24 is tightened accordingly.

At the end of tightening, the protrusion 16 locks into the locking hole 5, and the belt winding shaft 14 collides with the stepped portion 7, preventing the operating lever 10 from rotating too much and preventing it from rotating too much. Collision sound and control lever 10
It is possible to confirm that the tightening has been completed by the impact transmitted to the bolt. This state is shown in FIG.

To release the tightening of the belt 24, the operating lever 10 is rotated forward in the opposite direction to return to the state shown in FIG. 3 again.

According to the present invention, the connecting portion between the operating lever 10 and the hook mounting bracket 17 is connected to the side plate 12 of the operating lever 10, respectively.
and the side plate 19 are connected by a connecting shaft 21, and since it is not a through shaft, the through shaft does not get in the way unlike the conventional example described above, and the belt 24 bypasses the through shaft. There's no need. Therefore, the structure is simple, no stress is applied to the structure, and the belt 24 is less likely to be damaged. Furthermore, the first
As shown in the figure, since the belt 24 passes above the position of the coupling shaft 21 when the belt is tightened, all the force applied to the hook mounting bracket 17 acts to rotate the operating lever 10 in the belt tightening direction. However, the belt will not be unfastened inadvertently.

Further, according to the present invention, the operating lever 10 is formed with a bulging portion 15 and is connected to the hook attachment fitting 17 at the bulging portion 15, so that the hook attachment fitting 17 does not rub against the outer surface of the operating lever 10. There is no friction, and the operation lever 10 and the hook mounting bracket 17 can rotate smoothly. Also, the connecting shaft 2
1 is housed inside the bulging portion 15, the top surface of the head 23 is substantially flush with the inner surface of the side plate 12 of the operating lever 10, and the lever 10
There is little backlash between the Also lever 10
Since the distance between the side plates 12 of the belt is reduced, the length of the lever rotation shaft 8 and the belt winding shaft 14 can be shortened.
Furthermore, when a tensile force is applied to the belt 24, the lever 10 is less deformed.

Moreover, in the present invention, while the lever 10 is rotated from the released state to the tightened state, the coupling shaft 2
Since at least a portion of the head 23 of the main body 1 is always in a position where it can come into contact with the outer surface of the bearing portion 6 of the side plate 3 of the main body 1, even when a large force is applied to the hook mounting bracket 17, , coupling shaft 21
is supported by the side plate 3 of the main body 1 and is not bent, and the lever 10 can be rotated smoothly. Furthermore, there is no possibility that the coupling shaft 21 will get caught on the outer peripheral edge of the side plate 3 and become impossible to operate the lever 10.

In addition, in the present invention, the presser shaft 4 is provided at the rear of the main body 1, and the belt 24 passes under the presser shaft 4 in an overlapping state, so that the portion of the belt 24 from the presser shaft 4 to the lever rotation shaft 8 is The two belts are stacked one on top of the other, and the belt portion on the fixed side presses the belt portion on the free end side against the presser shaft 4.
Therefore, these two belt portions are in contact with each other over a wide area, creating a large frictional resistance, and the belt 24 does not loosen due to vibrations, which is an extremely favorable condition.

Further, when operating the operating lever 10 to tighten the belt 24, the belt 24 extends in a substantially straight line from the other fixed end to the lever rotation shaft 8, and the presser shaft 4 is placed on the belt 24. Since the main body 1 is supported, the force of rotating the operating lever 10
It does not rotate and is extremely easy to operate. Furthermore, since the belt 24 is held down by the presser shaft 4, the belt 24 will not be caught between the members during the tightening operation.

Further, in the embodiment, when the lever 10 is rotated in the belt release direction, the belt 24 is in contact with the lever rotating shaft 8 as shown in FIG. Therefore, by locking the hook 18 and the hook at the other end of the belt 24 to an article, etc., and pulling the free end of the belt 24 to remove the slack in the belt 24, when the belt 24 is kept taut, the free end of the belt 24 Although it is easy to tighten the belt 24 by pulling more strongly, it is difficult to loosen the belt 24 due to friction between the belts 24. Therefore, when the belt 24 is tensioned, especially when the belt 24 is
Even if the free end side of the lever 10 is not pulled and supported, the lever 10 will not loosen more than necessary and the lever 10 can be easily rotated.

Further, in the embodiment, there is a bulge 9 at the front lower part of the main body 1.
is formed, so that when the bottom of the main body 1 comes into contact with a structure such as a floor when tightening the belt fastener, the contact occurs at the bulge 9, and the lever 10, which is a movable member, rubs against the floor etc. It will not cause any damage. Further, even when the bulge 9 contacts the floor etc., it is a rolling contact, so damage to the floor etc. is extremely small.

In the belt tightening device of the present invention, the lever 10
The shape of the side plate 12 may be parallel as shown in FIG. 2, but if it is necessary to tighten the belt 24 with a large force,
As shown in the figure, there is a narrow part 2 at the tip of the lever 10.
5, and if necessary, insert the narrow portion 25 into a rod or the like so that the lever 10 can be operated with a large force.

In the example shown in FIG.
Although the hook 18 is pivoted at 0, it is not possible to swing the hook 18 from side to side with this structure. What is shown in FIGS. 7 and 8 is another example of the tip structure of the hook attachment fitting 17 that is improved in this respect.

In this example, the side plate 19 is formed by bending into a U-shape, and the bent portion 26 thereof is formed so as to be concave outward in the length direction. The bent portion 26 is inserted into a through hole 27 formed in the hook 18, so that the hook 18 can freely rotate up and down with respect to the hook attachment fitting 17 and swing its head left and right. Therefore, even if the position where the hook 18 should be locked is narrow, the hook 18 can be easily inserted and locked, and the belt 24 can be properly tightened. Furthermore, according to this example, the hook mounting fittings 17 can be easily processed;
Further, since there is no need to caulk the pin 20, it can be provided at low cost.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of the present invention, in which Figure 1 is a central vertical cross-sectional view with the belt tightened, and Figure 2 is a partially cutaway view of the operating lever. Fig. 3 is a central vertical cross-sectional view of the belt when it is released from tightening, and Fig. 4 is a plan view of the belt shown in Fig.
It is a - sectional view in the figure. Figures 5 and 6
The figures show other examples of the tip end of the operating lever according to the present invention, with FIG. 5 being a plan view and FIG. 6 being a central vertical sectional view. 7 and 8 show other examples of the hook attachment fitting of the present invention, in which FIG. 7 is a plan view and FIG. 8 is a central vertical sectional view. 1... Main body, 3... Side plate, 4... Presser shaft, 6...
...Bearing part, 7...Step part, 8...Lever rotation shaft, 1
0...Operation lever, 12...Side plate, 14...Belt winding shaft, 15...Bulging portion, 17...Hook mounting bracket, 18...Hook, 21...Connection shaft,
23...Head, 24...Belt.

Claims (1)

[Scope of utility model registration request] An operating lever 10 is rotatably supported on the main body 1 by a lever rotation shaft 8, and the operating lever 10
A hook mounting bracket 17 is rotatably supported on the shaft 1, and a belt is wound around the operating lever 10.
4, one end of the belt 24 is inserted from the rear of the main body 1, passed under the lever rotation shaft 8, wound around the belt winding shaft 14, and passed between the belt 24 and the lever rotation shaft 8 to the rear. drawer to,
In the belt tightening tool, the belt 24 is wound around the lever rotating shaft 8 and tightened by rotating the operation lever 10 backward, and the main body 1
and the operation lever 10 are mounted on side plates 3 and 1 on both sides, respectively.
2, the lever rotating shaft 8 is suspended between the side plates 3 and 12, and the attachment portion of the hook attachment fitting 17 on both side plates 12 of the operating lever 10 is squeezed outward and bulged. The both side plates 12 of the operation lever 10 are connected to the hook attachment fittings 17 separately by connecting shafts 21 at the bulging portions 15, and the bulging portions are formed at the inner ends of the connecting shafts 21. 15 is formed, and when the operating lever 10 rotates to tighten the belt 24, at least a part of the head 23 of the coupling shaft 21 is always attached to the main body 1. The outer circumference of the side plate 3 of the main body 1 has a step that comes into contact with the belt winding shaft 14 when the operating lever 10 is rotated and the belt 24 is tightened. A presser shaft 4 is suspended between the rear ends of the side plates 3 of the main body 1, and the belt 24 is attached to the presser shaft 4.
A belt fastener characterized by passing under the belt.