JPH0328884B2 - - Google Patents

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a cord holder used for inserting and holding a wire member such as a cord or cable, and in particular to a cord holder used for inserting and holding a wire member such as a cord or cable, and in particular to The present invention relates to an improvement in a cord holder equipped with a fastening ring that holds the cord tightly.

[Conventional technology]

2. Description of the Related Art Cord holders for inserting and holding cords are generally used in cord wiring connection parts in various devices, devices, and the like. In other words, this type of cord holder is installed and fixed by penetrating into a through hole drilled in a device casing, etc., and properly and firmly holds the cord inserted into the holder. The applied tensile force serves to protect the connecting portion of the cord against bending force and prevent breakage and poor contact. moreover,
Watertightness is often required for cord wiring connections where such cord holders are used, and in such cases, the cord must be held between the through hole on the housing side and the cord holder, and within the cord holder. It is desirable to have a sealing function in the part that is attached.

Various structures have been proposed as such cord holders, but all of them have advantages and disadvantages.In particular, they are capable of properly and reliably tightening and holding the cord inserted into the holder, and are No method has yet been proposed that can provide reliable sealing.

In other words, the most common cord holder conventionally has a sleeve made of an elastic material that holds the cord inserted into the holder body that is fixed to the housing side.
It is known that the free end of this sleeve is compressed and deformed toward the outer circumferential side of the cord by a tapered surface formed on the inner circumferential surface of a nut-shaped sleeve that is screwed onto the holder main body. However, in this structure, the sleeve is tightened using its own compressive deformation function, and when the cap is screwed onto the holder body side, the sleeve is tightened to the extent that it can be deformed. Not only does this require a high torque, but it is also difficult to ensure that the cord does not come off or that the cord is sealed securely.

For this purpose, a plurality of slits are formed at one end of the above-mentioned sleeve or at one end of the cylindrical body fitted to the outer periphery of this sleeve, and the elastic pieces formed by the slits are inserted into the cap. A cord has been proposed in which the cord is compressed and deformed on the outer peripheral side.

[Problem to be solved by the invention]

However, in such a structure, the tip of each elastic piece of the sleeve or cylindrical body is only compressed at multiple locations in the circumferential direction of the outer circumference of the cord,
As in the case described above, it cannot be said that it is possible to reliably prevent the cord from coming off or seal it, and the mold structure for molding the slit part described above is complex, making the manufacturing of the mold troublesome, and furthermore, the molding process is complicated. The drawbacks were that it lacked functionality and was expensive.

Further, a ring-shaped member formed by connecting a plurality of claw pieces in the circumferential direction via thin pieces and combining pieces connected in different directions is interposed on the outer periphery of the sleeve. It has also been proposed that the claws of the ring-shaped member are bitten into the outer periphery of the sleeve when the cap is screwed into the holder body.

However, the above-mentioned ring-shaped member is extremely troublesome to mold and process, and not only is it expensive, but also is compressed and deformed so that only the tip of each claw piece bites into the outer periphery of the sleeve when tightened. Therefore, the sleeve and the cord are only pressed against each other at multiple points in the circumferential direction, and as a result, it cannot be said that the cord is securely sealed and prevented from coming off as in the previous example, and when there are a large number of parts, It is desired that some kind of countermeasure be taken to eliminate these problems.

Furthermore, according to the above-mentioned cord holder, it is also desired to reduce the tightening torque when tightening and holding a linear member such as a cord from the viewpoint of operability, etc., and such points should also be taken into consideration. That is what is needed.

[Means to solve the problem]

In order to meet such demands, the cord holder according to the present invention is formed as an annular body made of an elastic material and has a tapered surface on at least one side of the outer circumference, and has an annular body having a tapered surface on both end faces in the axial direction. A plurality of slits each having a substantially V-shape in which the width is widened at the cut end side are cut in the axial direction alternately at predetermined intervals in the circumferential direction from mutually opposing ends. A fastening ring is formed in a zigzag shape by a frame-like body, and the fastening ring is inserted into a cord holder, which is made up of a holder body and a cap assembled to the holder body, and holds the cord through the cord holder. By fitting the holder into the outer peripheral part, the inner tapered surface formed on at least one of the holder body and the cap engages with the outer tapered surface, reducing the diameter by the slit gap. The cord is configured to form a tapered surface that tightens and holds the outer circumferential portion of the cord or a sleeve made of an elastic material fitted to the outer circumferential portion of the cord.
Further, according to the present invention, when the tapered surface is formed only on one end of the fastening ring, the pressing portion that presses the ring in the axial direction from the other end can be brought into sliding contact with the ring end surface as much as possible. It is constructed so that it can be slidably engaged with a certain area.

[Effect]

According to the present invention, the fastening ring, which is formed in a substantially serrated shape by the frame-like body having a zigzag shape in the circumferential direction so as to be freely expandable and contractible in the radial direction, is attached to the outer peripheral part of the linear member. By fitting directly or indirectly through a sleeve, incorporating this part into a cord holder consisting of a holder body and a cap, and integrally combining the holder body and cap by screwing these holders together. The zigzag-shaped inner circumferential portion of the fastening ring is elastically deformed uniformly over the entire circumference by the force in the centripetal direction from the inner circumferential tapered surface of the main body or cap, and the linear member or sleeve is properly and reliably deformed. It can be tightened and held, and sealing performance can be obtained around the linear member.
It is possible to reduce the tightening torque of this fastening ring by slidingly engaging the tapered surfaces or pressing portions with the minimum necessary sliding area.
This can improve operability.

〔Example〕

Hereinafter, the present invention will be explained in detail using embodiments shown in the drawings.

Figures 1a, b, and c show an embodiment of a fastening ring that characterizes the cord holder according to the present invention. It is formed of a material having elasticity such as various synthetic resin materials such as vinyl chloride, and has a substantially annular shape as a whole, and both end surfaces 10 in the axial direction thereof.
a, 10b, a plurality of slits 11 are equally distributed at predetermined intervals in the circumferential direction, and are alternately located between both end surfaces 10a, 10b. It is formed by being cut in the axial direction so as to have a letter shape. Therefore, this fastening ring 10 has a substantially serrated shape when viewed from the circumferential direction, and has a zigzag shape formed from a frame-like body having substantially the same width in the axial direction. And, such a fastening ring 10
According to the above, when a tightening force is applied in the centripetal direction from the outer periphery, the slits 11 can be elastically deformed by the gap between them so that each slit 11 disappears. 12 is capable of facultative deformation uniformly over the entire circumference.

Here, the inner peripheral part 12 of this fastening ring 10
has a circular diameter hole 13 having a dimension slightly larger than its outer diameter so that a sleeve into which a cord is inserted, which will be described later, can be fitted therein, and the outer circumferential portion 14 has a base at its center in the axial direction. It is formed with tapered surfaces 15 and 16 that become smaller in diameter toward both ends.

A fastening ring 1 having such a configuration
0 is a device housing 20 as shown in FIG. 2, for example.
It is used by being incorporated into a cord holder 23 used for holding a cord 22 in a cord wiring connection section 21 of the present invention.

To explain the structure of such a cord holder 23, in the figure, 24 is a holder body formed of a synthetic resin material etc. in a substantially cylindrical shape and having a cord insertion hole 25 inside. Threaded portions 26 and 27 are formed, respectively, and a flange portion 28 is integrally provided at the center in the axial direction. The holder main body 24 has one threaded portion 26 connected to a through hole 20 formed in the housing 20.
By inserting the nut 29 into the housing 20 and screwing the nut 29 together from the opposite side of the housing 20, the nut 29 and the flange portion 28 are fixed to the housing 20.

Further, a nut-shaped cap 30 made of synthetic resin or the like is assembled to the other threaded portion 27 of the holder main body 24 by screwing the threaded portion 31 on the inner peripheral portion of one end thereof. The cord 22 is connected to the other end of this cap 30.
The cord is inserted through an opening 32 formed to be slightly larger than the outer diameter of the cord. Then, within this cap 30, the threaded portion 3
The portion from 1 to the insertion opening 32 is formed with a tapered surface whose inner diameter gradually decreases.

Further, the cord insertion hole 2 in the holder main body 24
5, a large diameter portion 25a is formed on the side where the cap 30 is attached, and the cord 2 is attached to this portion.
2 is inserted into the sleeve 34 made of an elastic material such as rubber, and the inner end of the sleeve 34 is inserted into the large diameter portion 25a.
It is locked at the stepped part. The outer end of the sleeve 34 is configured to protrude from the end of the holder body 24 by a predetermined amount, and is extended so as to face part of the tapered surface 33 of the cap 30. Further, the open end side of the large diameter portion 25a into which the sleeve 30 is fitted is formed with a tapered surface 35 having a predetermined inclination angle.

In the cord holder 23 having such a configuration, the fastening ring 10 is fitted onto the outer circumferential portion of the sleeve 34 protruding from the end of the holder main body 24, and one tapered surface 15 of the outer circumferential portion is formed so as to allow the cord to pass through. It is assembled so that a portion thereof faces the holder main body 24 in correspondence with the tapered surface 35 on the hole 25 side. In this state, when the cap 30 is screwed onto the holder main body 24, the other tapered surface 16 of the fastening ring 10 comes into contact with the tapered surface 33 inside the cap 30 at its outer circumference, and this cap 30 is further tightened. By screwing them together, the tapered surfaces 16 and 33 slide into each other and bite into each other due to the wedge effect, and the resulting force in the radial direction compresses and deforms the fastening ring 10 in the radial direction.

Therefore, the sleeve 34 is held by the fastening ring 10 over its entire circumference, and the two members (10, 34) and the cord 22 are in close contact with each other in a securely compressed state. This allows the cord 22 to be properly and reliably prevented from coming off. Of course, both sides of the fastening ring 10 are held between the holder body 24 and the cap 30, and movement in the axial direction is restricted. Further, as is clear from FIG. 3, the fastening ring 10 has an inner circumferential portion 12 that can be in close contact with the outer circumferential portion of the sleeve 34 in a zigzag wave shape over the entire circumference without any break. This allows for reliable sealing in this area. Further, between the outer circumference of this fastening ring 10 and the holder main body 24, the sleeve 34 and the cord 22
The same goes for the cord wiring connection part 2.
The sealing performance with No. 1 is good. In addition, in such a structure, when the cap 30 is screwed onto the holder body 24, the fastening ring 10 is tightened by the tapered surfaces 15, 3 on the outer periphery of both ends thereof.
5; The wedge effect created by the sliding contact between 16 and 33 makes it extremely easy to tighten, and the tightening torque can be kept to the minimum necessary, which is advantageous in terms of operability.

Here, if the sleeve 34 is interposed between the cord 22 and the fastening ring 10 as described above, the elastic deformation of the sleeve 34 can be utilized to obtain a high tightening retention state and sealing performance. It goes without saying that this may be omitted. This is illustrated in FIG. 4, where the fastening ring 10
By using the code 2 without using the sleeve 34,
It will be easily understood that even if 2 is directly tightened and held, the same effects as in the above-mentioned embodiment can be obtained.

It goes without saying that the fastening ring according to the present invention is not limited to the structure of the embodiments described above, and that the shape, structure, etc. of each part can be modified and changed as appropriate. For example, as the fastening ring 10, FIG.
As shown in b and c, the outer circumference 10 may be formed in a substantially truncated conical shape with a tapered surface 40 that slopes in only one direction, and such a fastening ring 10 may be attached to the cord holder 23. Application cases are shown in FIGS. 6 and 7. In this case, the sleeve 34 or cord 22 is configured to be tightened and held by receiving force in the radial direction by being sequentially fitted into the tapered surface 35 on the outer periphery of the fastening ring 10 with a wedge effect. A protrusion 41 is formed on the cap 30 side for slidingly contacting the end surface of the fastening ring 10 and pressing it toward the holder main body 24 side.

A fastening ring 1 having such a configuration
Even if 0 and the cord holder 23 are used, a linear member such as a cord can be tightened and held by the zigzag frame over the entire circumference as described above, and reliable sealing performance can be obtained. The tightening torque is determined by pressing the protrusion 41 on the cap 30 side with a wedge effect while slidingly contacting the end surface of the fastening ring 10 with a small contact area. It can be tightened by the force in the centripetal direction obtained by the combination, and has the advantage that the tightening torque can be small.

Here, the fastening ring 10 interposed in this manner may be formed of a metal material having some elasticity, such as aluminum or copper.

Further, although the reference numeral 42 in FIG. 7 is a sealing material interposed between the outer peripheral portion of the fastening ring 10 and the tapered surface 35 on the side of the holder main body 23, this is not necessarily necessary. Furthermore, this fastening ring 10
It will be obvious that the cap 30 may be assembled to the cap 30 in the opposite manner to that shown in FIGS. 6 or 7.

〔Effect of the invention〕

As explained above, according to the cord holder according to the present invention, the cord holder is formed of an elastic material as an annular body having a tapered surface at least on one side of the outer periphery, and has an annular body on both end faces in the axial direction. A plurality of slits each having a substantially V-shape with a wider width at the cut end are cut in the axial direction alternately at predetermined intervals in the circumferential direction from the opposing ends, so that the slits have substantially the same width. The cord is formed into a zigzag shape by a frame-like body with As a result, the outer tapered surface slides into engagement with the inner tapered surface formed on at least one of the holder body and the cap, or the pressing portion provided on a portion of the holder body or the cap presses against the other. By slidingly engaging the end face of
The structure includes a fastening ring configured to tighten and hold the outer periphery of the cord or a sleeve made of an elastic material fitted to the outer periphery of the cord with a diameter reduced by the slit gap. And despite its inexpensive structure, it can be used as a fastening ring to expand and contract in the radial direction to accommodate the gaps between the multiple approximately V-shaped slits, and its inner circumferential portion is elastically deformed uniformly over the entire circumference. Because of this, it is possible to properly and reliably tighten and hold the wire member such as a cord inserted inside the cord and the sleeve that holds it, thereby ensuring that the wire member does not fall out and sealing at the tightened part. can be done,
In addition, there is plenty of room for the radial size of the members to be tightened and held, and there is a large degree of freedom in application. The ring can be tightened with low torque, and has various excellent effects such as excellent moldability of each part and low cost.

[Brief explanation of drawings]

Figures 1a, b, and c are side views and both end views of an embodiment of a fastening ring used in a cord holder according to the present invention, and Figure 2 is an example of a cord holder using this fastening ring. FIG. 3 is a schematic diagram for explaining its function and effect, FIG. 4 is a schematic diagram showing a modification of FIG. 2, and FIG.
Figures a, b, and c are views showing another embodiment of the present invention, and Figures 6 and 7 are schematic sectional views of a cord holder showing an example of its application. DESCRIPTION OF SYMBOLS 10... Fastening ring, 10a, 10b... Both ends in the axial direction, 11... Slit, 12... Inner peripheral part, 1
3...Circular hole, 14...Outer periphery, 15, 16; 40...
Tapered surface, 22... Cord (linear member), 23... Cord holder, 24... Holder body, 30... Cap, 33, 35... Tapered surface, 34... Sleeve.

Claims (1)

[Claims] 1. A cord holder consisting of a holder body through which a cord is inserted and held, and a cap screwed onto the holder body, and a cord holder which is fitted onto the outer circumference of the cord within the cord holder. The fastening ring is formed of an elastic material as an annular body with tapered surfaces at both ends of the outer periphery, and both end faces in the axial direction of the fastening ring are formed of an elastic material. A plurality of slits each having a substantially V-shape, each of which is wider at the cut end, are cut facing each other and alternately at predetermined intervals in the circumferential direction from each end, and also in the axial direction. The holder body is formed in a zigzag shape by frame-like bodies having approximately the same width dimension, and the inner periphery of the holder main body and the cap include:
By slidingly engaging the tapered surface of the outer circumferential portion of the fastening ring, a tapered surface is formed to tighten and hold the outer circumferential portion of the cord by reducing the diameter of the ring by the amount corresponding to the slit gap. Features a cord holder. 2. In the cord holder according to claim 1, the fastening holder is attached to the outer periphery of a sleeve made of an elastic material that is fitted around the outer periphery of the cord, and the cord is inserted through the sleeve. A cord holder characterized by tightening and holding. 3. A cord holder consisting of a holder body through which a cord is inserted and held, and a cap screwed onto the holder body, and a fastening device that is fitted onto the outer circumference of the cord within the cord holder and tightens and holds the cord. The fastening ring is formed of an elastic material as an annular body with a tapered surface on at least one side of the outer periphery, and has respective notches on both end faces in the axial direction. A plurality of slits each having a substantially V-shape with the ends widened are cut facing each other and alternately at predetermined intervals in the circumferential direction from each end, and also in the axial direction. It is formed in a zigzag shape by frame-like bodies having the same width dimension, and is slidably engaged with the tapered surface of the outer peripheral part of the fastening ring on the inner peripheral part of at least one of the holder main body and the cap. A tapered surface is formed, and by slidingly contacting the end surface of the fastening ring and applying a pressing force in the axial direction to the inner circumferential portion of the other side of the holder body and cap, the ring is tightened by the slit gap. A cord holder characterized in that a pressing portion is formed to tighten and hold the outer peripheral portion of the cord with a reduced diameter. 4. In the cord holder according to claim 3, the fastening holder is attached to the outer periphery of a sleeve made of an elastic material that is fitted around the outer periphery of the cord, and the cord is inserted through the sleeve. A cord holder characterized by tightening and holding.