JPH0783368A - Fastening band and fastening tool - Google Patents

Abstract

PURPOSE:To accurately and quickly perform fastening work by guiding lower end parts placed adjacent to each other of a rise-up part in a fastening edge part by a guide part provided in an inner side overlapping part, in the case of contracting a diameter of a band main unit by fastening the fastening edge part of a fastening band by a fastening tool. CONSTITUTION:Lower end parts of each leg part 24a, 24b of a fastening band 10, formed in a ring shape, are placed to approach each other by point end parts 34 of a fastening tool, and a diameter of the fastening band 10 is contracted to connect a connected unit. Each leg part 24a, 24b is formed broadly gradually toward an upper end direction from the lower end part. Also a point end shape of the point end 34 of the fastening tool 32 is formed in a recessed shape. Fastening can thus be performed surely. Guide parts 28a, 28b are provided in overlapping parts 16, 18, and the leg parts 24a, 24b of a fastening edge part 22 are guided so as to approach each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tightening band and a tightening tool for tightening an object to be fastened at a connecting portion such as an automobile boot.

[0002]

2. Description of the Related Art FIG. 10 is a drawing showing a tightened state of a conventional tightening band. 11: is the figure seen from the arrow A direction of the conventional tightening tool shown in FIG. 10, and is explanatory drawing which shows the shape of the front-end | tip part of a tightening tool. Tightening band 50
Is used when a fastened body 54 such as a rubber tube is connected to the pipe 52. Reference numeral 56 is a metal band main body formed to have a substantially uniform width over the entire length, and the inner overlapping portion is formed in a state in which one end is wound so as to be positioned outside the other end and formed into a ring shape. 58 and an outer overlapping portion 60. The inner overlapping portion 58 and the outer overlapping portion 60 of the band body 56 are connected to each other by, for example, spot welding. Reference numeral 62 denotes a tightening ear portion, which is formed in a U shape by projecting an intermediate portion of the outer overlapping portion 60 outward. The tightening ear portion 62 is a well-known diameter reducing means called a loose Oetiker ear. Tightening band 50 having the above structure
First, the band main body 56 is first die-cut from a metal flat plate, the tightening ear portion 62 is formed at a predetermined position of the band main body 56, then it is curled, and finally the inner overlapping portion 58 and the outer overlapping portion are overlapped by spot welding or the like. The part 60 is connected to form a ring shape. In this tightening band 50, after the outer circumference of the tightened body 54 is fitted, the rising portion of the tightening ear portion 62 is crushed by using a pliers-shaped tightening tool 64 to reduce the diameter of the band main body 56, so that the tightened body 54 is secured. Can be tightened. In addition, the tightening ear portion 62 of the conventional tightening tool 64
As for the shape of the tip end portion 66 that comes into contact with the rising portion, the tip end edge is formed in a substantially straight line.

[0003]

However, the above-mentioned conventional tightening band and tightening tool have the following problems. Since the tightening band curls the band body after forming the tightening ears, the angle of each bent part of the tightening ears becomes loose when curled, and the spacing between each rising part of the tightening ears becomes the upper end. The lower end portion tends to be wider than the portion. Therefore, at the time of tightening, the tip end portion of the tightening tool that abuts the lower end portion of each start-up portion is likely to slide upward of each start-up portion, and thus the tightening work is difficult to perform. Further, since the tip end portion of the tightening tool is formed in a substantially straight line, it easily slips in the width direction of the band body when it comes into contact with the lower end portions of the respective rising portions. Therefore, when tightened, there is a problem that a force is applied diagonally to the tightening ear portion, the tightening ear portion is twisted, and is weakened against the force in the radial direction constantly applied to the tightening band. Therefore, an object of the present invention is to provide a tightening band and a tightening tool that can perform tightening work accurately and quickly.

[0004]

In order to solve the above problems, the present invention has the following constitution. That is, the tightening band according to claim 1 of the present application is made of metal having an inner overlapping portion and an outer overlapping portion in a state in which one end is wound so as to be positioned outside the other end and formed into a ring shape. Of the band body, a first locking portion provided at one end of the band body, and the inner overlapping portion,
Second engaging portion that can be engaged with the engaging portion, a fastening ear portion that is formed in a U shape by projecting an intermediate portion of the outer overlapping portion outward, and at least the fastening ear portion. It is characterized by comprising guide portions provided so as to project outward from both end portions in the width direction of the inner overlapping portion in the region. Further, the tightening ears may be formed such that the middle part of each rising part is wider than the lower end part of the rising part.

The tightening band according to claim 3 of the present application is
A metal band main body having an inner overlapping portion and an outer overlapping portion in a state in which one end is wound so as to be located outside the other end side and formed into a ring shape, and provided at one end of the band main body. A first engaging portion, a second engaging portion provided on the inner overlapping portion and engageable with the first engaging portion, and a middle portion of the outer overlapping portion outwardly. It is characterized in that it is formed in a U shape by projecting to the upper part, and the middle part of each rising part has a tightening ear part wider than the lower end part of the rising part.

Further, in the tightening tool according to claim 4 of the present application, each of the tip portions is in contact with the rising portion of the tightening ear portion of the tightening band according to claim 1, 2 or 3 of the present application, and each of the tip portions is In the tightening tool for bringing the respective rising portions closer to each other to reduce the diameter of the band main body, the tip edges of the respective tip portions are formed in a concave shape having a depressed central portion. .

[0007]

[Function] When the tightening band is fitted on the object to be fastened and the tightening ear of the tightening band is tightened by the tightening tool to reduce the diameter of the band body, the lower end of each rising part of the tightening ear is overlapped inside. The guide portions provided in the mating portion guide each other to approach each other. Further, if the middle part of the rising portion of the tightening ear is formed wider than the lower end, and the shape of the tip edge of the tip of the tightening tool is a concave shape with the central part depressed,
When tightening, the tip of the tightening tool bites into the lower end of the rising part, making it difficult to slip.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a front view showing a tightened state of a tightening band according to the present invention. Figure 2
FIG. 2 is a plan view of FIG. 1. FIG. 3 is a left side view of FIG. 1. FIG. 4 is a plan view showing a state before the tightening band of FIG. 1 is curled. FIG. 5 is a front view of the tightening band of FIG. 4 when the tightening ears are formed. FIG. 6 is a front view when the guide portion and the second locking portion are formed in the tightening band of FIG. FIG. 7 is a front view when the first locking portion is formed on the tightening band of FIG. 4. FIG. 8 is a front view of a main part showing a tightening ear part and a guide part when the tightening band of FIG. 1 is tightened. 9: is explanatory drawing which shows the shape of the front-end | tip part of the tightening tool used for FIG.

First, the structure of the tightening band 10 will be described with reference to FIGS. 1 to 3. Reference numeral 12 denotes a metal band main body, which has an inner overlapping portion 14 and an outer overlapping portion 16 in a state in which one end thereof is wound so as to be positioned outside the other end and formed into a ring shape. . 18
Is a first locking portion, one end of the band body 12 is formed in a T shape, and a portion protruding in the width direction of the band body 12 is bent outward to be provided at one end of the band body 12. Has been. The projecting portion may be bent inward or may not be bent. Reference numeral 20 denotes a hook-shaped second locking portion provided on the inner overlapping portion 14. The interval between the second locking portions 20 is formed to be narrower than the width of the first locking portion 18, and when the band body 12 is curled and formed into a ring shape,
Can be engaged with the locking portion 18 of. When engaged, the first engaging portion 18 is located outside the second engaging portion 20 (outside in the width direction of the band body 12), and when the tightening band 10 is tightened, the second engaging portion 18 is engaged. It prevents the interval of the stoppers 20 from expanding. The first locking portion 18 and the second locking portion 20
The shape of is not limited to this embodiment, and for example, the shape of the first locking portion 18 is used as the locking hole, and the second locking portion 2
The shape of 0 may be a locking piece that engages with the locking hole.

Reference numeral 22 denotes a tightening ear portion, which is formed in a U shape by projecting an intermediate portion of the outer overlapping portion 16 outward. Numerals 24a and 24b are legs serving as rising portions of the tightening ears. The tightening ear 22 is provided with a recess 26 for reinforcement. In addition, in the present embodiment, the width of the leg portions 24a and 24b is formed so as to gradually widen from the lower end portion toward the upper end portion as shown in FIG. Any shape may be used as long as it is wider than the lower end. Reference numerals 28a and 28b denote guide portions, which are provided so as to project outward from at least both ends in the width direction of the inner overlapping portion 14 at least in the region of the tightening ears 22. Further, the distance between the guide portions 28a and 28b is set so that the tightening ear 2
2 is formed to be slightly longer than the width of the lower end of each leg 24a, 24b. In this embodiment, the guide portions 28a, 28
When the band main body 12 is formed in a ring shape, b is continuously protruded at a height lower than the protruding height of the tightening ear portion 22 over the range including the tightening ear portion 22. The guide portions 28a and 28b may be divided into several parts and projectingly provided.

Next, referring to FIG. 1 and FIGS. 4 to 8,
The processing procedure of the tightening band 10 will be described. From a flat metal plate (not shown), the band main body 12 having a shape as shown in FIG. 4 is manufactured by die-cutting, and subsequently, at a portion B shown in FIG. 4, a tightening ear portion 22 as shown in FIG. Are formed by pressing. At this time, the C portion becomes the leg portions 24a and 24b. Next, while curling the D portion and the E portion at the other end of the band body 12 to a predetermined diameter, bend them outward along the straight lines M and N,
As shown in FIG. 6, the second locking portion 20 and the guide portions 28a and 28b are formed at the respective positions. Next, the F portion protruding from one end of the band body 12 in the width direction of the band body 12 is bent outward along the straight lines M and N, and the first locking portion 18 is formed.
To form. Finally, the band body 12 is stacked so that one end of the band body 12 is located outside the other end, and further curled.
The engaging portion 18 of is engaged with the second engaging portion 20 to form the ring-shaped tightening band 10 shown in FIG. Reference numeral 30 is a first through hole provided at the other end of the band body 12, and a tightening band 10 is used to fasten an object (not shown) such as a rubber tube.
This is to reduce the step generated when the is connected to a pipe (not shown). 32 is D of the band body 12
The second through hole provided in the portion, the second locking portion 20 is formed by being bent, and the strength of the portion D against bending deformation is increased, and the portion D is easily deformed in an arc shape when tightened. It is for doing.

Next, the tightening tool 32 for tightening the above-described tightening ear portion 22 will be described with reference to FIGS. 8 and 9. The tightening tool 32 has a structure substantially similar to that of the conventional tightening tool 32, except that the leg portions 24 a, 24 of the tightening ear portion 22.
The shape of the tip end portion 34 that abuts b is different. In detail, the tip edge is formed in a concave shape with a depressed central portion. Further, the width of the tip portion 34 is formed to be substantially the same as or slightly wider than the width of the lower end portions of the leg portions 24a and 24b. In order to increase the diameter reduction amount of the tightening band 10, it is necessary to contact the lower ends of the leg portions 24a and 24b of the tightening ear portion 22 as much as possible. Therefore, the width of the tip end portion 34 is the guide portion 28a, It is better to make it narrower than the space between the guide parts 28a and 28b, but when the protruding height of the guide parts 28a and 28b is low, the width of the tip part 34 may be wider than the space between the guide parts 28a and 28b.

Next, the procedure for tightening the tightening band 10 will be described with reference to FIGS. 1 and 8. As shown in FIG. 1, each leg portion 24 of the tightening band 10 formed in a ring shape.
When the tip end portion 34 of the tightening tool 32 is brought into contact with the lower end portions of a and 24b and the tip end portion 34 of the tightening tool 32 is brought close to each other, the leg portions 24a and 24b are brought close to each other to reduce the diameter of the tightening band 10. A fastened body (not shown) is connected to a pipe (not shown). Each leg 24a, 24b is formed so as to gradually widen from the lower end toward the upper end, and the tip edge of the tip 34 of the tightening tool 32 is also formed in a concave shape. Therefore, at the time of tightening after the tip end portion 34 once abuts the leg portions 24a, 24b, the tip end portion 34 of the tightening tool 32 bites into the widthwise ends of the leg portions 24a, 24b so as not to slip. Figure 8
It is possible to securely tighten the tightening ear portion 22 with the tightening tool 32 shown in FIG.

Further, the leg portion 24 of the tightening ear portion 22 is further added.
Since a and 24b are guided and approached by the guide portions 28a and 28b, even if the force applied from the tightening tool 32 to the tightening ear portion 22 deviates slightly in the oblique direction, the leg portions 24a and 24b.
b does not protrude from the inner overlapping portion 14 of the band body 12 and is not tightened in a state where the tightening ear portion 22 is twisted. As a result, after tightening, it becomes stronger against the force always applied in the radial direction. Further, as shown in FIG. 1, when the tightening ear portion 22 is located at the uppermost part of the ring-shaped tightening band 10, the first locking portion 18 and the second locking portion 20 are provided.
When the engaging position of is lower than the center line L of the tightening band 10, the force applied to the engaging portion acts along the circumferential direction, and thus the hook-shaped second locking portion 20 is less likely to be deformed. .

Although various explanations have been given with reference to the preferred embodiments of the present invention, the present invention is not limited to the above embodiments, the guide portion is not provided in the inner overlapping portion, and the leg portion of the tightening ear portion is not provided. Even if the shape of is just wider than the lower end part, the workability of the tightening work can be improved by using the tightening tool having the concave tip edge, which does not depart from the spirit of the invention. It goes without saying that many modifications can be made within the range.

[0016]

When the tightening band and the tightening tool according to the present invention are used, when the tightening band is externally fitted to the object to be fastened and the tightening ear of the tightening band is tightened by the tightening tool to reduce the diameter of the band body, The lower ends of the respective rising portions of the tightening ears are guided by the guide portion provided in the inner overlapping portion and approach each other. Therefore, even when a force in an oblique direction is applied to the tightening ear portion when tightening, the tightening ear portion is not twisted and tightened, and the band becomes strong against the force always applied to the band in the radial direction. Also, if the middle part of the rising part of the tightening ear is formed wider than the lower part and the shape of the tip edge of the tip of the tightening tool is concave with the center part recessed, the lower end of the rising part at the time of tightening Since the tip portion of the tightening tool bites into the portion to prevent slipping, the tightening work can be performed accurately and quickly, which is a remarkable effect.

[Brief description of drawings]

FIG. 1 is a front view showing a tightened state of a tightening band according to the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a left side view of FIG.

FIG. 4 is a plan view showing a state before the tightening band of FIG. 1 is curled.

5 is a front view of the tightening band of FIG. 4 when a tightening ear portion is formed.

6 is a front view of the tightening band of FIG. 4 when a guide portion and a second locking portion are formed.

7 is a front view of the tightening band of FIG. 4 when a first locking portion is formed.

8 is a front view of relevant parts showing a tightening ear part and a guide part when the tightening band of FIG. 1 is tightened. FIG.

9 is an explanatory view showing the shape of the tip of the tightening tool used in FIG. 8. FIG.

FIG. 10 is a view showing a tightened state of a conventional tightening band.

11 is a view of the conventional tightening tool shown in FIG. 10 as viewed from the direction of arrow A, and is an explanatory view showing the shape of the tip of the tightening tool.

[Explanation of symbols]

 10 tightening band 12 band body 14 inner overlapping part 16 outer overlapping part 18 first locking part 20 second locking part 22 tightening ears 28a, 28b guide part

Claims (4)

[Claims] 1. A metal band main body having an inner overlapping portion and an outer overlapping portion in a state in which one end is wound so as to be positioned on the outer side of the other end and formed into a ring shape, and the band main body. A first locking part provided at one end of the main body, a second locking part provided at the inner overlapping part and engageable with the first locking part, and an outer overlapping part Provided so as to project outward from at least the widthwise ends of the inner overlapping portion in the region of the fastening ear portion, and the fastening ear portion that is formed in a U shape by projecting the middle portion outward. A tightening band, comprising: 2. The tightening band according to claim 1, wherein the tightening ear portion is wider at a midway portion of each rising portion than at a lower end portion of the rising portion. 3. A metal band main body having an inner overlapping portion and an outer overlapping portion in a state in which one end is wound so as to be positioned outside the other end side and formed in a ring shape, and the band main body. A first locking part provided at one end of the main body, a second locking part provided at the inner overlapping part and engageable with the first locking part, and an outer overlapping part A tightening band, wherein the middle part is formed in a U shape by protruding outward, and each middle part of each rising part has a tightening ear part wider than a lower end part of the rising part. 4. The leading end portions of the fastening band of the fastening band according to claim 1, 2 or 3 are brought into contact with the rising portions of the fastening ears, and the leading portions are brought closer to each other so that the rising portions are brought closer to each other. In the tightening tool for reducing the diameter of the band body, the shape of the tip edge of each of the tip portions is formed in a concave shape with a depressed central portion.