JPH036129Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> This invention prevents the telephone line from sagging in the air when, for example, drawing the telephone line indoors from a telephone pole, and also prevents the telephone line from sagging in the air. The present invention relates to an electric wire retaining device used to protect telephone lines from damage by bearing part of the stress applied to the telephone lines at branch points from pillars.

<Prior Art> A conventional locking device of this type that is considered to be closest to the present invention is disclosed in Japanese Utility Model Publication No. 56-28821.

The ends of this fastener are connected by a connecting member,
It has a pair of parallel metal clamping members with the other end being a free end, and a wire insertion groove for inserting the electric wire along the length is formed between both clamping members. .

This clamping member is also called a sheet pile member, and the outer surfaces of a pair of such clamping members are both inclined in a wide taper shape so as to gradually move away from each other as they go from the leading end to the rear free end. This is because when viewed as a whole, it looks like an arrowhead.

Fitted onto the outside of the pair of sheet pile members is a metal frame member with a C-shaped cross section, the inner surface of which becomes wider and tapered from the tip to the rear end.

This frame member is capable of sliding in the length direction along the outer shape of the pair of sheet pile members, and a handle made of metal wire folded back into a long and thin loop extends from the rear end, which is the widest part. It's out.

In such a configuration, after inserting the electric wire along its length into the wire insertion groove between the pair of sheet pile members,
When the frame member fitted on the outside of the sheet pile member is relatively moved toward the wider side of the sheet pile member, the pair of sheet pile members will move against both side walls near the rear end using the mutually connected tips as a fulcrum. are biased toward each other, and as a result, the wire insertion groove becomes narrower toward the rear end, applying pressure to the wire, and this pressure holds the wire in place.

<Problems to be solved by the invention> In the conventional example described above, as is obvious from the configuration, when the work of securing or tightening the electric wires is performed, the distance between the sheet pile members, which were initially parallel, changes from the tip. It becomes a reverse taper towards the rear end. In other words, after the wire has been secured, the radially inward compressive force applied to the wire differs depending on its length position.
The strength increases from the tip to the rear.

Rather, the wire is actually compressed and clamped at approximately one location near the rear end where the wire insertion groove is narrowest.

The generation of such localized pressure is, of course, undesirable. This is because this type of fastener, which should originally reduce the stress applied to the wire, instead acts to apply localized stress to the wire held between the wires.

The present invention has been developed to eliminate these drawbacks of the conventional example, and is designed to apply a clamping force as uniform as possible to the wire held between a pair of clamping pieces along the length of the clamping pieces. It is a diagram. In other words, this means changing from the conventional holding by "points" to holding by "lines."

<Means for Solving the Problems> In order to achieve the above object, the present invention inserts the length of the electric wire into the wire insertion groove between the pair of clamping pieces formed with the length on the first member. After extending and inserting the second member, the pair of clamping pieces are placed in the space formed in the second member, and the second member is inserted relative to the first member. Slide the member in the length direction, press the pair of outer surfaces of the clamping piece toward each other with a pair of opposing inner surfaces in the space of the second member, and hold. An electric wire holding device that clamps the electric wire by narrowing the width of the electric wire insertion groove with this pressing force; By being fixed to the first member, the other end becomes a free end and the upper edge becomes a free edge; and the outer and inner surfaces of the pair of clamping pieces have the above length before inserting the electric wire. The width of the electric wire insertion groove, which is tapered toward each other from the one end in the horizontal direction to the other end, and is formed between the inner surfaces of the pair of clamping pieces,
While the width is narrow in a tapered shape from the one end side to the other end side; the inner surfaces of the pair of space portions of the second member that accommodate the pair of clamping pieces are also narrow from one end in the length direction. To provide a fastener for an electric wire, which is tapered so as to approach each other toward the other end.

<Function> The electric wire fastener of the present invention configured as described above has the following functions.

First, after inserting the part of the wire to be held between the pair of clamping pieces along its length, the space for receiving the clamping piece of the second member is faced from its wide rear end side, and the pair of clamping pieces are The distal end sides of the clamping pieces that are close to each other are inserted, and the entire second member is relatively slid rearward in the longitudinal direction to an extent that is not unreasonable.

This state is a temporarily assembled state of both the first and second members, but when the second member is pulled further relatively rearward from this temporarily assembled state, both the first and second members that define the space of the second member are The inner surface presses the pair of clamping pieces toward each other.

At this time, since the inner surface is tapered in the same direction as the outer surface of the clamping piece, this pressing action is like pushing the tapered surface with the tapered surface, so that the pair of clamping pieces move toward each other and , rather, they tend to be parallel to each other, and as described above, each clamping piece is fixed to the first member only at a part of the lower edge on one end side in the longitudinal direction, and the other end is fixed to the first member. Since the free end and upper edge are free edges, such deviations are not disturbed.

In particular, with the deformation of the pair of clamping pieces, the wire insertion groove, which is formed with the inner surfaces of the pair of clamping pieces as the side walls of the groove, will naturally change from its original tapered shape (first When the groove width is reduced as a whole, the groove width can be deformed to be as uniform as possible over the entire length.

In addition, since the upper edge of the clamping piece is also a free edge along its entire length, each clamping piece is attached to the first member so as to fit the outer shape of the electric wire sandwiched between them. It can also be tilted using the fixed part at the lower edge as a fulcrum.

As a result, even the electric wire housed in the wire insertion groove between the pair of clamping pieces is subjected to a fairly uniform clamping force not only locally along the length of the clamping pieces, but also over the length of the clamping piece. The wire clamping force can be increased without causing local stress.

<Embodiment> Each of FIGS. 1 to 5 shows a preferred embodiment of the wire pulling fastener according to the present invention.

The fastener 1 of this embodiment has a pair of members 2 and 3 that overlap vertically. If the above claims are followed, member 2 will be the first member and member 3 will be the second member, but for convenience, the first member 2 will be the first member according to the vertical relationship in the drawing in FIG. The lower member and the second member 3 are called the upper member.

The overall shape of both the lower member 2 and the upper member 3 is generally rectangular, and each component provided therein, which will be described later, is made of a suitable plastic material.

A wire insertion groove 22 having an appropriate length is inserted into a pair of clamping pieces 2 provided on the lower plate portion 20 of the lower member 2.
1 and 21, and the pair of clamping pieces 21 and 21 are tapered toward each other as they go from one end side to the other free end side facing each other in the length direction.

As a result, the electric wire insertion groove 22 defined between the opposing inner surfaces of both the clamping pieces 21, 21, before the electric wire is inserted, also becomes smaller as it goes from one end of the clamping piece to the other end. The groove is tapered in the length direction so that the groove width gradually narrows.

Moreover, the clamping pieces 21, 21, as described later,
The force applied to each outer surface causes the inner surfaces to be deformed in a direction in which the inner surfaces are aligned parallel to each other while narrowing the distance between them.In order to facilitate such deformation, in this embodiment, each of the inner surfaces is The clamping piece is fixed to the lower plate part 20 only at the portions 23, 23 on the one end side, and the other end is a free end.

In addition, the upper edge side opposite to the lower edge side where the portions 23, 23 that are fixed to the lower member 2 are located,
Since the entire length in the length direction is a free edge, each clamping piece 21, 21 can also be tilted using the fixed part 23, 23 as a fulcrum, as will be described later with reference to FIG. , which contributes to uniform retention and diameter tolerance along the length of the wire.

Here, in accordance with the illustrated case, the one where the fixing portion or the supporting portions 23, 23 are located is considered to be the rear end of the pair of clamping pieces or the wire insertion groove, and the other end is considered to be the tip. This also applies when indicating the directionality of the length direction of the lower member 2 and the upper member 3.

It is desirable that the lower member 2 further includes a guide member 24 that guides the movement when the upper and lower members are slid relative to each other in the longitudinal direction after the upper member 3 is stacked as described later. In this embodiment, such guide members are configured as grooves 24, 24 cut laterally from the inside along the length of each side wall rising from both sides of the lower plate portion 20.

In the illustrated case, the upper member 3 has a rectangular block-like outer shape 33, but when it is placed on the lower member 2 of the above-described configuration, the upper member 3 has the above-mentioned structure provided on the lower member 2. There is a space 31 that accommodates the pair of clamping pieces 21, 21. A pair of opposing inner surfaces 32, 32 defining this space 31 are also tapered toward each other as they go from the rear end to the front end with respect to the pair of clamping pieces.

Further, at the lower portions of both sides of the block-shaped outer portion 33, guided portions 34 which can be slidably fitted into the guide groove 24 of the lower member 2 described above, but preferably without play, are provided. Rail-like overhangs 34, 34 are provided.

When the guide member 24 and the guided member 34 are constructed of the groove 24 and the rail or protrusion 34 as in this embodiment, it also serves to prevent the upper and lower members 3 and 2 from coming off vertically after they are assembled. Get out.

The upper member 3 is also provided with a hanger 4 for hooking the main fastener to a hook provided at a telephone pole or a telephone line entrance of a house. Whiskers, only,
The hanging handle 4 is the only metal component in this embodiment, and is made of a metal wire folded back into a long and thin loop. Upper member 3 of this hanging hand
In this embodiment, insert molding is used for fixing.

That is, as particularly clearly shown in the sectional view of FIG. 5, both folded ends of the metal wire 4 are placed in the injection mold of the upper member 3, and in this state, a suitable plastic material is injected into the mold. , the hanging arm 4 is fixed at the same time as the upper member 3 is formed.

The electric wire C is held in place using both the upper and lower members configured as described above, using the following operation.

First, the portion of the electric wire C to be held is inserted into the tapered electric wire insertion groove 22 defined between the pair of clamping pieces 21, 21 along its length. In this state, it is preferable to set the dimensions such as the interval between the clamping pieces so that the tapered portion of the wire insertion groove 22 lightly clamps the wire C. This is because the combination between the electric wire C and the lower member 2 will not come off even if you temporarily remove your hands from the work.

Next, the space 31 for receiving the clamping pieces of the upper member 3 is faced from its wide rear end side, and the clamping pieces 21, 21 are
Insert the rails 34, 34 as guided members into the corresponding hanger grooves 24, 24 on the lower member 2 side so as to insert the tip end side of the rails 34, 34 to the extent that it is not unreasonable.
The entire upper member is slid longitudinally rearward relative to each other.

In this state, both the upper and lower members are temporarily assembled, and this is shown in FIG.

When it is time to fasten the wires from this temporarily assembled state, the upper member 3 is further pulled relative to the lower member 2 as shown by arrow F.

Then, the inner surfaces 32, 32 that define the space 31 of the upper member press the clamping pieces 21, 21 in the direction toward each other.
2 and 32 are tapered in a similar manner in the same direction as the outer surface of the clamping piece, so this pressing action is like pushing the tapered surface with the tapered surface, and therefore the clamping pieces move closer to each other but rather This causes a deviation in which the two sides tend to be parallel to each other.

Therefore, the wire insertion groove 22 defined between the clamping pieces
Also, although the groove width is reduced, the tapered form is deformed in the direction that is eliminated, and as a result, the wire C to be clamped is not locally along the length of the clamping piece, but almost entirely. A fairly uniform pressing force will be applied. This, of course, promises to hold the wires stably and reduce stress.

In particular, as mentioned above, both clamping pieces can eliminate the tapered shape and can be biased so that they are parallel to each other as much as possible, and therefore the wire insertion groove itself can be reduced in groove width as uniformly as possible. As mentioned above, each clamping piece has a part 2 of its lower edge on one end side.
Only in Nos. 3 and 23, the structure in which it is fixed to the lower member and the other end is a free end contributes greatly. This is because deflection in the in-plane rotational direction is also possible around the fixed portions 23, 23.

The state in which the wire C has been clamped in this way is shown from different viewpoints in Figures 3 to 5, and as is clear from Figure 5, each clamping The pieces 21, 21 can not only be deflected in the in-plane rotational direction as described above, but also have a free edge over the entire length in the upper edge of each clamping piece, so that they cannot be fixed to the lower member. Part 23,
It can also be tilted using 23 as a fulcrum.

In the case of this fifth illustration, each clamping piece 21, 21
Although the upper edges of the wire C are shown slightly inclined toward each other, if such an inclination deviation is also possible, it will be even more likely that the wire C will be It can be held stably while adapting well to the external shape of the wire, and the tolerance to the diameter of the wire is also increased.

In addition, in the figure, the protrusions 35, 35 provided at the tips of the lower surface of the upper member 3 are the result of deformation to the extent that the clamping pieces come into close contact with each other, such as when the wire to be clamped is quite thin. 3 is a stopper to prevent this from happening even if it could be pulled out in the direction of arrow F, and it is a desirable component if provided.

Furthermore, on the inner surface of each clamping piece 21, 21, that is, the surface portion that directly grips the electric wire C, as shown in this embodiment, there are anti-slip teeth 25, which serve as check teeth against the direction in which the electric wire is pulled out, for example. It is also desirable to add... Of course, other forms of anti-slip may be adopted, and it is not necessary to provide this in particular.

Similarly, ribs 26..., 36... of an appropriate shape and number may be provided on the outer surfaces of the upper and lower members 3, 2 to prevent hands from slipping during work or for reinforcement. .

Furthermore, even if the guide member 24 and the guided member 34 are provided, they may be switched between the upper and lower members in the opposite direction to that shown in the drawings, or a combination relationship other than that shown in the drawings may be used. .

Of course, when removing the wire C that has been secured as required, it is sufficient to move both members 2 and 3 in the opposite direction to the direction F of the securing work.

<Effects of the invention> As in the present invention, when pressing a pair of clamping pieces from both sides, the pair of clamping pieces are supported only at one end in the length direction, and the tapered surface is pressed with a tapered surface of a similar shape. If a pushing configuration is adopted, the clamping force on the electric wire will not be localized. In other words, it is possible to clamp the clamping piece with as uniform a force as possible over the entire length of the clamping piece.

Therefore, not only does it not put any strain on the wire, but it can also exhibit a relatively greater holding force than the conventional method of holding it at one point.

Furthermore, the fastening device of the present invention can be obtained through a substantially simple manufacturing process, and the upper and lower members can be molded into one piece, including the components necessary for each. . Therefore, there is no need to individually assemble the device before use as in the conventional case.

Of course, it also has excellent tolerance to the diameter of the wire to be held.

[Brief explanation of the drawing]

The first is a partially exploded perspective view of a preferred embodiment of the electric wire fastener according to the present invention, the second is a plan view in a temporarily assembled state, and the third is a diagram showing the wire being clamped or held in place. Figure 4 is a fragmented plan view of the main parts in this state, and a vertical cross-sectional view after completion of the securing.
FIG. 5 is a cross-sectional view after completion of securing. In the figure, 1 is the entire fastener of the present invention, 2 is the first member to the lower member, 3 is the second member to the upper member,
4 is a hanger, 20 is a lower plate part, 21 is a clamping piece, 22 is an electric wire insertion groove, 23 is a fixing part of the clamping piece, 24 is a guide member, 25 is a non-slip, 26 is a rib, 31 is for holding the clamping piece , 32 is the inner surface thereof, 33 is the outer shape, 34 is the guided member, 35 is the projection for preventing pulling out, 36 is the rib, C is the electric wire to be held,
F is the relative sliding direction.

Claims (1)

[Claims for Utility Model Registration] After inserting the electric wire along its length into the wire insertion groove between the pair of long holding pieces formed on the first member, the second member is inserted. After placing the pair of clamping pieces in the space formed in the second member, the second member is slid relative to the first member in the longitudinal direction, and A pair of opposing inner surfaces in the space of the second member press the outer surfaces of the pair of clamping pieces in a direction toward each other, thereby narrowing the groove width of the wire insertion groove by the pressing force. The pair of clamping pieces are fixed to the first member only at a part of the lower edge on one end side in the longitudinal direction, and The ends are free ends, and the upper edges are free edges; and the outer and inner surfaces of the pair of clamping pieces are opposite to each other in the longitudinal direction from the one end to the other end before the electric wire is inserted. The width of the wire insertion groove, which is tapered so as to be closer to each other and is formed between the inner surfaces of the pair of clamping pieces, is also
While the width is narrow in a tapered shape from the one end side to the other end side; the inner surfaces of the pair of space portions of the second member that accommodate the pair of clamping pieces also extend from one end in the length direction. A wire fastener characterized by being tapered toward the other end so as to approach each other.