JPH10147361A - Band cramp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a band cramp with a simple constitution and general-purpose properties which exhibits enough hooking and tensile strength in accordance with the diameter of all the wire bundles to be bundled. SOLUTION: This band cramp 1 consists of a slender band part 2 with a number of projected lines 7 provided mutually in parallel in the transverse direction on the surface provided by a pair of side edges 9 in parallel by an approximately definite interval along the length direction and a buckle part 3 connected with on its end 10 and with a through-hole 6 in which a hooking nail 4 is arranged and has a style wherein the other end 11 of the band part 2 winding a number of bundled wires is passed through the through-hole and is tightened by pulling and a projection and the hooking nail are hooked together at a position where the tensile force is relaxed to hold the tightened condition and the heights and the pitches of the projections provided on the surface of the band part are formed lower and smaller in a small pitch region PS being close to the buckle part than in a large pitch region PL near the other end.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a band clamp, and to a surface clamp defined by a pair of side edges extending generally in parallel at regular intervals and along its length. An elongated band portion having a large number of provided ridges, and a buckle portion having a through hole connected to one end of the band portion and having a locking claw provided therein, and a large number of bundled bundles The other end of the band portion around which the wire is wound is inserted into the through hole and a pulling force is applied, and at the position where the pulling force is released, the projection and the locking claw are engaged with each other. The present invention relates to a band clamp for holding a bundle of wires in a tight state.

[0002]

2. Description of the Related Art A conventional band clamp will be described with reference to FIGS. 7 to 9. FIG. 7 is a plan view showing a band clamp having a very general configuration, and FIG. FIG. 2 is a plan view of a conventional band clamp having two rows of ridges in which the pitch H, that is, the distance between the ridges P before and after the engagement of the locking claws R is shifted by half left and right. The band portion B is provided with ridges of the same arrangement on the front and back sides. Therefore, a pair of upper and lower locking claws R, R project from the through hole A of the buckle portion C. FIG. 9 is a partial cross-sectional explanatory view showing a use state of these conventional band clamps. A wire S is held in a tightly closed state in a band portion B connected in a ring shape. The tightening state of the wire rod is substantially the same as the use state of the band clamp 1 according to the present invention, so that it is used in the description of the embodiment of the present invention shown in FIGS.

[0003] These conventional band clamps are provided with various types having different lengths of the band portion B and sizes of the buckle portion C on the assumption that a relatively large number of wires as shown in FIG. 9 are held. It has been. However, in order to reduce manufacturing costs, standardization of parts is a requirement of the times from the viewpoint of rationalization in manufacturing, and in particular, it is frequently used in the manufacturing process of electric parts or products that require parts of various dimensions. Such a common band clamp is not an exception, and the appearance of a band clamp having a certain mechanical strength capable of binding and holding a small number of wires has been demanded in the past.

In the general band clamp shown in FIG. 7, each of the ridges P has a working side surface that is perpendicular or acute to the surface of the band portion in cross-sectional shape, and the locking claw R is attached to the band portion B. A flexible structure that allows the ridges to elastically contact and pass with respect to the pulling motion of the band, and abuts the working side surface at the same time as the release of the pulling force to stop the band portion at the release position. A directional ratchet mechanism is formed.

In order to securely tighten and hold a bundle of small diameter wires using such a band clamp, first, the band itself needs to have great flexibility, and the thickness of the band itself must be large. It is desirable to make the pitch H for engaging with the locking claw R as small as possible. Secondly, as a problem of mechanical strength at the time of tightening, particularly, tensile strength, it is desired to reduce the overall pitch. In order to make the pitch smaller, it is necessary to make the height of the ridge P smaller, that is, lower. However, when the pitch is reduced, the engagement area between the ridge and the locking claw becomes small, so that the ridge is easily detached from the locking claw or the ridge is easily buckled. When used in the above, there arises a problem that sufficient tensile strength in the radial and circumferential directions cannot be obtained.

Further, in order to solve such conflicting problems in bending and strength, a band clamp shown in FIG. 8 has been provided. That is, two rows of the ridges P are arranged by being shifted by a half pitch along the length direction of the band portion B.
1 and P2 are similarly shifted by a half pitch to engage with the locking claws R1 and R2 projecting into the through hole A of the buckle portion C in two rows. A device has been devised so that it can be locked in 1/2 pitch increments without any loss.

However, in such a configuration, the width of the ridges P1 and P2 and the locking claws R1 and R2 is reduced to half, resulting in inferior locking strength, and at the same time, a large number of wires S having a large diameter are used. In the case of tight binding and tightening, the locking force against the large circumferential tensile force generated in the band portion B is still insufficient. In particular, such band clamps are often integrally molded from inexpensive materials such as relatively flexible polypropylene, and when such a large-diameter wire is tightly bound and tightened, the band portion extends, There is a risk of damage such as buckling of the ridge, and there is a problem that the mechanical strength is insufficient.

[0008]

As described above, when binding with a large diameter, it has sufficient flexibility to be able to cope with binding with a small diameter without deteriorating the locking and tensile strength, and exhibits a necessary locking force. The advent of band clamps has been desired.
However, an object of the present invention is to provide a band clamp having a wide range of adaptability and a simple structure that exhibits sufficient locking and tensile strength corresponding to the diameter of all bundles of wires to be bound. Things.

[0009]

According to the present invention, the height and pitch of the ridge formed on the surface of the band portion are large in the small pitch region near the buckle portion. This is achieved by providing a band clamp characterized by being formed lower and smaller than the pitch area.

With such a configuration, the pitch is small and the height of the ridge is small for the material to be tied with a small diameter, so that sufficient flexibility can be obtained and the number of locking points increases, so that the material can be securely tightened and held. It is possible. In addition, with such a configuration, an intended locking force can be obtained even when molded from a relatively flexible material such as inexpensive polypropylene.

Further, according to one embodiment of the present invention, the height and the pitch of the ridge are such that at least a small pitch region near the buckle portion approaches the buckle portion. It is gradually and continuously formed lower and smaller. By doing so, the flexibility gradually and continuously increases and the number of ridges increases even for various small-diameter materials to be tied. Therefore, the optimum locking state is always achieved.

[0012] According to another embodiment of the present invention, the height and pitch of the ridge are at least in a small pitch region near the buckle portion.
It is formed gradually and gradually lower and smaller as it approaches the buckle portion. With such a configuration, the present invention can be applied to a plurality of types of materials to be tied having a standardized diameter to some extent.

According to another embodiment of the present invention, the ridge is provided on both sides of the band portion, and the ridge engages with the ridge. A locking claw is formed on a surface facing the through hole.
Due to this, the surface of the band portion is locked from the front and back surfaces in the through hole of the buckle portion, so that a larger locking force can be obtained, and the binding material such as a wire can be more securely held tight. It becomes possible. Further, according to this embodiment,
The band portion is capable of winding the material to be wrapped from both left and right directions and locking the buckle portion in the buckle portion.

An embodiment according to the present invention will be described below with reference to the accompanying drawings. It should be noted that the present invention is not limited to the embodiments described below, and various modifications are possible based on the technical idea of the present invention.

[0015]

FIG. 1 is a side view showing one embodiment of a band clamp 1 according to the present invention.
FIG. 2 is a front view of the band clamp 1. In addition,
In use, the band 2 must always have the ridge 7 positioned on the outer surface, so that the material to be wrapped is wound counterclockwise and pulled out from the back side of the through hole 6 of the buckle section 3 to the front side. FIG. 3 is a cross-sectional view taken along the line XX of FIG. 2 and shows a state in which the band portion 2 in the region PS near the buckle portion 3 is locked to the buckle portion 3. FIG. 4 is a partially enlarged cross-sectional view showing an engagement state between the protrusion 7 and the locking claw 4 in FIG. FIG. 5 is a view similar to FIG. 3, and shows a state in which the band portion 2 in a region PL near the other end 11 away from the buckle portion 3 is locked to the buckle portion. FIG.
FIG. 6 is a partially enlarged cross-sectional view showing an engagement state between the ridge 7 and the locking claw 4 in FIG. 5.

1 to 6, a band clamp 1 according to the invention has a laterally extending surface which is defined by a pair of side edges 9 extending along a longitudinal direction parallel to one another at substantially constant intervals. A plurality of protruding ridges 7 provided in parallel with each other are formed alternately with a band portion 2 having a free end at the other end 11 of the band portion 2 and a first end 10 of the band portion 2. And a buckle portion 3 having a through hole 6 formed along the length direction of the band portion. Inside the through hole 6, an L having a lateral portion suspended from the upper wall portion along the length direction and capable of bending and moving up and down.
A hook-shaped locking piece 5 extends. On the lower surface of the lateral portion, a downwardly protruding locking claw 4 protrudes until it comes into contact with the lower wall portion of the through hole.

The cross-sectional shape of the locking claw 4 is such that a ridge formed on the surface of the band portion 2 is inclined perpendicularly or at an acute angle to the direction in which the other end 11 of the band portion enters the through hole 6. 7
Has a working surface that meshes with the inclined side surface of the first member, and has a generally inclined triangular shape. Therefore, the band 2
Although there is a certain amount of elastic resistance due to the flexibility of the locking piece 5 when it enters the through hole, the apex portion merely passes through the contact portion and does not cause any obstacle, but returns to the opposite direction. This action surface acts as a so-called "one-way ratchet mechanism" to engage with the side surface of the ridge to completely prevent movement. Such a ratchet mechanism is substantially the same as that used in the conventional general band clamp shown in FIG. 7, and a folded thin steel plate is suspended from the upper wall by insert molding. It is also possible to substitute for

On the other hand, as described above, the band portion 2 is formed on the elongated surface defined by the pair of side edges 9 with a large number of ridges 7 slightly spaced in a direction crossing at right angles to the direction of extension. It is arranged, but its upper surface is flush with the original surface of the band portion 2, and both side edges 9 along the extension direction are left as they are with their original thickness, and a sufficient length direction that works in use is used. The tensile strength is improved and the durability for reuse is improved. Therefore, in practice, each ridge 7 is defined by piercing the parallel grooved grooves 8 at predetermined intervals.

In order to perform the tightening operation as shown in FIG.
The other end 1 of the band 2 around which a number of bundled wires S are wound
1 is inserted into the through hole 6, and the pulling force is continuously applied to the other end side toward the near side in FIG. 2. When the pulling force is released when a predetermined tightening state is obtained, the band is released at that position. The part 2 is completely stopped by the mutual engagement of the ridge 7 and the locking claw 4, that is, by the ratchet action, and holds the bundle of wires in a tight state.

As is particularly apparent from FIGS. 3 and 4,
In order to hold a small number of wires in a tightened state, the band must be bent to a smaller diameter to form an annular body, but a large-diameter annular when tightening a larger number of wires requiring high tension is required. In view of the versatility of use as a body, it becomes impossible to cover with a single component as has been done conventionally.

Therefore, according to the present invention, the height h of the ridge 7 pierced on the surface of the band portion and the pitch H, which is the separation distance between adjacent ridges, are set at least in the region PS close to the buckle portion 3. The above problem is solved by forming the area smaller than the area PL near the end and increasing the number of ridges and grooves that can be engaged per unit length. In addition, at the same time as the substantial thickness of the band portion 2 is reduced to improve the flexibility, the locking piece 4 is detached from one groove 8 to smoothly and quickly move to the next groove and securely engage therewith. The height h of the ridge 7 is set low.

By adopting such a configuration, the band portion 2 is easily bent and deformed into a small-diameter annular body, and the ridge 7 is provided in small increments, so that fine adjustment at the time of tightening becomes possible. It is possible to hold the material to be bound without loosening. Further, even when the entire band clamp is formed of a relatively flexible material such as inexpensive polypropylene, the interval between the ridges is reduced to a small pitch region PS close to the buckle portion 3.
5 and 6, in the large pitch region PL near the other end, the height h and the pitch H of the ridge 7 are set to the locking claws in the same manner as in a general band clamp. The height and the size are set to the same as those in FIG. Therefore, a secure tightening and holding state by the same large locking force as the conventional binding band can be obtained.

To ensure such versatility,
The height h and the pitch H of the ridges 7 of the band portion 2 are gradually and continuously lowered and smaller as the buckle portion is approached in the small pitch region PS near the buckle portion 3. Therefore, the flexibility of the belt part gradually increases as it approaches the buckle part even for various small-diameter materials to be tied. As a result, a locking force that is not affected by the size of the binding diameter can be obtained in a stepless manner, so that a secure tightening and holding can be always performed.

As one modified example, the height h and the pitch H of the ridge 7 are gradually and gradually reduced in the small pitch region PS near the buckle portion 3 as the buckle portion is approached. It is suggested to do. With such a configuration, the present invention can be applied to a plurality of types of materials to be tied having a standardized diameter to some extent. It should be noted that such a continuous or stepwise reduction in the pitch and height of the ridge is not particularly limited to the small pitch area PS, and may be started from the large pitch area PL near the other end. It is needless to say that can be appropriately changed according to the purpose of use.

Further, as another modification, as shown in the above-mentioned prior art, ridges 7 are provided on both surfaces of the band portion 2 and the locking claws 4 which engage with these ridges are provided.
May be formed on the upper and lower opposing surfaces of the through hole 6.
With this configuration, the surface of the band portion is locked from the front and back surfaces in the through hole of the buckle portion, so that a larger locking force can be obtained, and it is possible to more securely hold the material to be bound such as a wire rod. Becomes Further, the band portion can wind the material to be wrapped from both left and right directions and lock it in the buckle portion, and thus can be properly used according to the use situation.

[0026]

Although the band clamp according to the present invention has the simple structure as described above, it has sufficient locking and tightening strength in each case corresponding to the diameter of all the bundles of wires to be bound. It has the versatility that it can be obtained. Furthermore, even when molded from a relatively flexible material such as polypropylene which is available at a low cost, the desired locking force can be obtained without damage such as tearing or loosening of the band portion or buckling of the ridges or locking claws. Therefore, a great advantage is obtained not only in terms of manufacturing but also in terms of economy as compared with the conventional binding band.

[Brief description of the drawings]

FIG. 1 is a side view showing one embodiment relating to a band clamp according to the present invention.

FIG. 2 is a front view of the band clamp shown in FIG. 1;

3 is an arrow view showing a fitting state of a small pitch region of the band in the XX section of FIG. 2;

FIG. 4 is a partially enlarged cross-sectional view showing an engagement state between a ridge and a locking claw in FIG. 3;

5 is an arrow view showing a fitting state of a large pitch region of the band similar to FIG. 3;

FIG. 6 is a partially enlarged cross-sectional view showing an engagement state between a ridge and a locking claw in FIG. 5;

FIG. 7 is a plan view showing a conventional band clamp having a very general configuration.

FIG. 8 is a plan view of another conventional band clamp.

FIG. 9 is a partial cross-sectional explanatory view showing a use state of a conventional band clamp.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Band clamp 2 Band part 3 Buckle part 4 Locking claw 6 Through hole 7 Ridge 9 Side edge 10 End (one end) 11 End (other end) S Wire rod h Height of ridge H Pitch of ridge PS Small Pitch area PL Large pitch area

Claims (4)

[Claims] An elongated member having a plurality of laterally parallel ridges provided on a surface defined by a pair of side edges extending parallel to each other at substantially constant intervals along a longitudinal direction. And a buckle portion having a through hole connected to one end of the band portion and having a locking claw therein, and the other of the band portion wound with a large number of bundled wires. The end is inserted into the through-hole and a pulling force is applied. At the position where the pulling force is released, the protrusion and the locking claw are engaged with each other to hold the bundle of wires in a tightened state. In the band clamp, the height and pitch of the ridge formed on the surface of the band portion are formed to be lower and smaller in a small pitch region near the buckle portion than in a large pitch region near the other end. Characterized by ba Dokuranpu. 2. The height and pitch of the ridges are gradually and continuously reduced and reduced as the buckle portion is approached, at least in a small pitch region near the buckle portion. The band clamp according to claim 1, wherein 3. The height and pitch of the ridges are gradually and gradually reduced and smaller as the buckle portion is approached, at least in a small pitch region near the buckle portion. The band clamp according to claim 1, wherein 4. The ridge is provided on both sides of the band portion, and the locking claw that engages with the ridge is
The band clamp according to any one of claims 1 to 3, wherein the band clamp is formed on a surface facing the through hole.