JP4175871B2 - Service line support device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lead-in wire support device for supporting a lead-in wire of an electric wire while being fixed to a building, and more particularly, to a lead-in wire support device capable of relaxing the tension when the tension from the lead-in wire increases.
[0002]
[Prior art]
In order to draw a lead-in wire from a main line of an electric wire into a building, generally, a lead-in wire support device for supporting the lead-in wire while being fixed to the building is widely used. Such a general lead-in wire support device is composed of a metal fitting fixed to a wall of a building with a bolt or the like, and is configured to support a lead-in wire extending from the main line and to guide its tip into the building. .
[0003]
When supporting the lead-in wire, give a predetermined amount of slack between the main line and the lead-in wire support device, and when the length of the lead-in wire changes due to changes in the outside air temperature, wind, etc. When the lead-in wire swings, the tension applied to the lead-in wire support device is increased and the lead-in wire is cut off or the lead-in wire support device is prevented from being damaged. However, when a gust such as a relatively large earthquake or typhoon blows, it is expected that the increase in tension due to slack cannot be absorbed.
[0004]
In view of this, a lead-in wire support device has been proposed that can absorb the increase when the lead wire has an excessive increase in tension. For example, there is one disclosed in Patent Document 1. When the tension from the outside exceeds a preset maximum allowable tension limit, the lead-in wire support device operates the tension relaxation mechanism without resisting the tension, and determines the length of the tension relaxation mechanism. The tension can be relaxed by increasing the amount.
[0005]
[Patent Document 1]
JP-A-7-107647 [0006]
[Problems to be solved by the invention]
However, the conventional lead-in wire support device described above has a problem that although it can prevent the lead-in wire from being cut or the device is damaged due to an increase in tension, the subsequent return is not easy. In other words, it is necessary to return the device to its original state after the tension relief mechanism has been activated. It becomes difficult.
[0007]
The present invention has been made in view of such circumstances, and it is possible to reliably absorb the increase in the tension of the lead-in wire and to facilitate the recovery work for returning to the original state. Is to provide.
[0008]
[Means for Solving the Problems]
According to a first aspect of the present invention, in a lead-in wire support device for supporting a lead-in wire of an electric wire while being fixed to a building, a wire formed in a cylindrical shape and connected to a part of the lead-in wire from one end thereof is inserted. A supporting device main body, a sliding member disposed in the supporting device main body, locking the proximal end of the wire, and movable in a longitudinal direction in the supporting device main body, the sliding member and the An elastic member disposed between one end of the support device body and a holding means for pressing the sliding member at a predetermined angle and with a predetermined force to hold the sliding member at a predetermined position in the support device body; The holding means includes a contact portion that can contact the sliding member, a bearing that is formed in the corresponding contact portion and that contacts the concave groove of the sliding member in a normal state, and the contact portion. Energize in the direction of pressing against the sliding member A compression coil spring, and arbitrarily adjust the amount of contraction of the compression coil spring and a adjusting means for adjusting the pressure applied to the sliding member of the contact portion, when a predetermined or more force is applied to the incoming line A cylindrical first receiving portion that rotates and releases the contact between the bearing and the concave groove, and that is extended from the support device main body and has an open end, and the first receiving portion A second accommodating portion that is screwed to the distal end side and can cover the opening of the first accommodating portion; and the compression coil spring is disposed in an internal space formed by the first accommodating portion and the second accommodating portion. While being housed, the amount of contraction of the compression coil spring is adjusted by arbitrarily adjusting the screwing position of the second housing portion.
[0009]
According to this configuration, when the tension of the lead-in line increases and the pressing force on the sliding member by the holding means is exceeded, the holding by the holding means is released and the sliding member moves toward one end of the support device main body. However, the movement is performed against the elasticity of the elastic member, and the moving speed of the sliding member is slowed down. Thus, an increase in the tension of the lead-in wire can be absorbed, and at the time of restoration work for returning to the original state, the sliding member is moved to the holding means and held at a predetermined position.
[0012]
According to a second aspect of the invention, the lead-support apparatus of claim 1, wherein a scale for displaying the optimum screwing position of the second housing part the operator is provided on a side surface of the first housing portion It is characterized by that.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
As shown in FIG. 1, the lead-in wire support device according to the present embodiment supports a lead-in wire H extending from the main line of the electric wire toward the building, and the lead-in wire support device 1 and the utility pole B The leading end of the lead-in wire H can be introduced into the building with a predetermined amount of slack therebetween.
[0014]
As shown in FIGS. 2 and 3, the lead-in wire support device 1 includes a support device body 2 formed in a cylindrical shape, a sliding member 11 disposed in the support device body 2, and an elastic member. Coil springs 7 a to 7 c and a pair of holding means 3. Note that both ends of the coil spring 7a are on the coil seats 8 and 9, both ends of the coil spring 7b are on the coil seats 9 and 10, and both ends of the coil spring 7c are on the coil seat 10 and the sliding member 11, respectively. It is in contact.
[0015]
The support device main body 2 has a wire 6 inserted from one end 2a thereof and a holding means 3 formed on the other end 2b side. Further, a cover member 4 having a notch on the side is wound around the outer peripheral surface of the support device main body 2, and a lower end surface of the cover member 4 is bent to form a flange portion 4a.
[0016]
And the flange board 5 is being fixed over the lower surface of the support apparatus main body 2, and the lower end surface of the flange part 4a, and several screw hole 4aa is formed through each. The lead-in wire support device 1 can be fixed to the building by inserting a screw through the screw hole 4aa. It should be noted that the fixing of the lead-in wire support device 1 is not limited to such screw fixing.
[0017]
The wire 6 is connected to a part of the lead-in wire H at the tip 6a, and the sliding member while being inserted into the through holes formed in the approximate centers of the coil seat portions 8 to 10 and the sliding member 11, respectively. 11, the base end 6b is locked on the other end surface side (left end surface side in FIG. 3). That is, the wire 6 is inserted from the one end 2a side of the support device body 2 and is locked to the sliding member 11 via the coil springs 7a to 7c.
[0018]
The sliding member 11 is movable in the longitudinal direction in the support device main body 2. When the tension of the lead-in wire H increases and the wire 6 is pulled toward the one end 2a, the sliding member 11 moves in the direction a in FIG. The increase in tension can be absorbed. That is, the increase in the tension of the lead-in wire H is absorbed by the increase in the dimension between the lead-in wire support device 1 and the utility pole B (see FIG. 1) due to the displacement of the sliding member 11.
[0019]
Accordingly, when the amount of slack of the lead-in wire H is minimized, even when an excessive tension increase occurs in the lead-in wire H due to an earthquake or wind, the increase can be absorbed, and the lead-in wire support device 1 breakage or cutting of the lead-in wire H is avoided. It should be noted that such absorption of an increase in tension functions particularly effectively in a building having a base-isolated structure. That is, the buildings adopting the seismic isolation structure are mainly those that can be displaced by a predetermined dimension in the horizontal direction in the event of an earthquake, but according to the lead-in wire support device 1 according to this embodiment, such displacement It is also possible to absorb an increase in the tension of the lead-in wire H caused by.
[0020]
In addition, coil springs 7a to 7c as elastic members are disposed between the sliding member 11 and the one end 2a of the support device main body 2, thereby suppressing the moving speed of the sliding member 11 when absorbing the tension. It is possible to avoid the destruction of the lead-in wire support device 1 more reliably. That is, when the sliding member 11 is pulled by the wire 6 and moves in the direction a, it resists the elasticity of the coil springs 7a to 7c, and the movement speed is suppressed and the impact is absorbed.
[0021]
In the present embodiment, the three coil springs 7a to 7c are arranged in series to form an elastic member. However, a single coil spring may be used, and the direction of movement of the sliding member 11 is opposite. It is good also as other elastic members (for example, a disc spring which penetrated the wire 6, a rubber body, etc.) which can provide elasticity.
[0022]
Each holding means 3 presses the sliding member 11 with a predetermined force to hold the sliding member 11 at a predetermined position (the position shown in FIG. 3) in the support device main body 2 at a normal time. A contact portion 14 that can contact the contact member 14, a compression coil spring 12 that urges the contact portion 14 in a direction in which the contact portion 14 is pressed against the sliding member 11, and a first storage portion 3 a and a second storage portion as adjustment means. 3b.
[0023]
More specifically, as shown in FIGS. 4 and 5, the first accommodating portion 3 a extends from the other end 2 b side of the support device body 2 in a direction substantially orthogonal to the longitudinal direction, and the tip is open. The second housing portion 3b is made of a lid that can be screwed onto the distal end side of the first housing portion 3a to cover the opening of the first housing portion 3a. The compression coil spring 12 is housed in an internal space formed by the first housing portion 3a and the second housing portion 3b.
[0024]
That is, a screw shape 3aa is formed on the outer peripheral surface of the first housing portion 3a, and a screw shape 3ba that can be screwed with the screw shape 3aa is formed on the inner peripheral surface of the second housing portion 3b. Therefore, when the second housing 3b is rotated with respect to the first housing 3a, the vertical dimension of the internal space in which the compression coil spring 12 is housed can be expanded and contracted. Thereby, the amount of compression of the compression coil spring 12 can be adjusted arbitrarily.
[0025]
The compression coil spring 12 has one end fixed to the contact portion 14 and the other end fixed to the convex seat portion 13 formed in the second housing portion 3b. The sliding member 11 is allowed to slide in the first housing portion 3a while being urged in the 11 direction. In addition, a bearing 15 is formed in the contact portion 14, and a concave groove 11 a that can contact the bearing 15 is formed on a side surface of the sliding member 11.
[0026]
As shown in FIG. 5, a bearing shaft L is formed on the sliding member 11 side of the contact portion 14, and the vicinity of the upper and lower ends thereof is fixed by a push nut 16. 15 is configured to be supported. Instead of the support structure of the bearing 15, another support structure (for example, one that fixes the bearing shaft L with a positioning screw) may be used.
[0027]
Thereby, the sliding member 11 is normally pressed by the pair of bearings 15 urged by the compression coil spring 12 and is held at a predetermined position on the other end 2b side in the support device main body 2. When the wire 6 is pulled with an increase in the tension of the lead-in wire H and a force greater than a predetermined value (a force greater than the urging force by the compression coil spring 12) is applied, the concave groove 11a causes the outer race of the bearing 15 to become the inner race (both The abutting portion 14 including the bearing 15 is pushed into the holding means 3 while being rotated relative to the figure.
[0028]
Thus, the sliding member 11 is released from the holding by the holding means 3 and moves toward the one end 2a side of the support device body 2 while resisting the elasticity of the coil springs 7a to 7c. It can be done. Thereafter, in order to return the lead-in wire support device 1 to the original state (normal state), the sliding member 11 is moved to the other end 2b side of the support device body 2, and the bearing 15 is brought into contact with the concave groove 11a.
[0029]
Therefore, the restoration work for returning the lead-in wire support device 1 to the original state is simply a work for returning the sliding member 11 to the original position, which facilitates the restoration work, and allows for replacement of parts accompanying the restoration. It can be unnecessary. Further, even if the sliding member 11 is pulled with an excessive force, the moving speed is slowed by the elasticity of the coil springs 7a to 7c, so that the lead-in wire support device 1 is prevented from being broken by an impact. be able to.
[0030]
That is, since the holding of the sliding member 11 is performed by the pressing force of the holding means 3, the holding means 3 remains without being destroyed even after the release of the holding, and the part replacement work accompanying the recovery is eliminated. It can be done. The bearing 15 in this embodiment is preferably a general-purpose bearing such as a roller bearing or a ball bearing, but may be replaced with a roller member or a simple roller shape.
[0031]
Further, as shown in FIG. 6, a scale 17 is provided on the side surface of the first housing portion 3a to display the optimum screwing position of the second housing portion 3b to the operator. That is, if the second storage portion 3b is rotated, the screwing position of the second storage portion 3b can be changed by moving in the x direction relative to the first storage portion 3a. If the accommodating part 3b is moved, the amount of contraction of the internal compression coil spring 12 can be changed.
[0032]
Thereby, the operator can arbitrarily set the pressing force by the holding means 3 according to the number of the lead-in wires H and the length from the utility pole B, and easily perform the initial setting of the lead-in wire support device 1. be able to. Specifically, the scale 17 has a tensile load according to the length of the lead-in line and the like, and if the screwing position of the second accommodating portion 3b is adjusted to the scale 17 that meets the conditions, The sliding member 11 can be held with a small pressing force.
[0033]
The scale 17 may be engraved on the side surface of the first housing portion 3a or may be described by printing. In addition, a comparison table between the condition of the lead-in line H and the pressing force by the holding means 3 is prepared separately, and the second accommodating portion 3b is screwed to the scale 17 based on the target table at the time of initial setting work or restoration work. The position may be adjusted.
[0034]
Thus, by marking the scale 17, the pressing force of the abutting portion 14 against the sliding member 11 can be adjusted more quickly and accurately. Can be improved. Of course, the scale 17 may not be provided, and it may be set in advance how many times the second accommodating portion 3b is rotated to meet the condition of the lead-in line H.
[0035]
Although the present embodiment has been described above, the present invention is not limited to this. For example, as shown in FIG. 7, a ring-shaped guide member G is fixed to a building, and the wire 6 is attached to the guide member G. It may be inserted and a part of the lead-in wire H may be connected to the tip. In this way, even if the lead-in wire support device 1 is installed in the longitudinal direction with respect to the building, the increase in the tension of the lead-in wire H can be effectively absorbed.
[0036]
Further, in the present embodiment, two holding means 3 are extended from the side surface of the support device main body 2, but one holding means 3 may be used as long as the holding force is maintained. Further, the holding means is not limited to that of the present embodiment, and may have other configurations as long as it can hold the sliding member 11 in a normal state and can release the holding when the tension of the lead-in wire H increases. .
[0037]
【The invention's effect】
According to the first aspect of the present invention, it is possible to reliably absorb the increase in the tension of the lead-in wire and to move the sliding member to the position of the holding means at the time of restoration. Recovery work for returning can be facilitated. In addition, since the elastic member is interposed between the sliding member and one end of the support device main body, the moving speed of the sliding member can be suppressed, and the lead-in wire support device is destroyed. Can be avoided.
[0038]
Further, according to the first aspect of the invention, it is possible to adjust the pressing force for any adjusted to slide member abutment shrinkage amount of the compression coil spring at adjusting means, Ya amount of incoming line It is possible to easily support the optimum lead-in wire in consideration of conditions such as length.
[0039]
Furthermore, according to the first aspect of the present invention, the amount of contraction of the compression coil spring is adjusted by arbitrarily adjusting the screwing position of the first housing portion with respect to the second housing portion, so that the sliding can be performed more easily. The pressing force on the member can be adjusted. Further, since the amount of compression of the compression coil spring is adjusted by adjusting the screwing of the second housing portion to the first housing portion, the adjustment can be reliably performed with a simple configuration, and the sliding can be performed more appropriately. The moving member can be held.
[0040]
According to the invention of claim 2 , since the scale for displaying the optimal screwing position of the second housing portion to the operator is provided on the side surface of the first housing portion, The pressing force can be adjusted more quickly and accurately, and the workability during installation work and restoration work in the lead-in wire support device can be improved.
[Brief description of the drawings]
FIG. 1 is a schematic view showing a state in which a lead-in wire support device according to an embodiment of the present invention is fixed to a building. FIG. 2 is a perspective view showing the lead-in wire support device according to an embodiment of the invention. Fig. 4 is a longitudinal sectional view of a lead-in wire support device according to an embodiment of the present invention as viewed from above. Fig. 4 is an enlarged sectional view of the vicinity of the holding means. Fig. 5 is a sectional view taken along line VV in Fig. FIG. 7 is an enlarged side view of the holding means in the lead-in wire support device according to the embodiment of the invention. FIG. 7 is a schematic diagram showing another installation state with respect to the building in the lead-in wire support device according to the embodiment of the invention.
DESCRIPTION OF SYMBOLS 1 ... Lead wire support apparatus 2 ... Support apparatus main body 3 ... Holding means 3a ... 1st accommodating part 3b ... 2nd accommodating part 4 ... Cover member 5 ... Flange plate 6 ... Wires 7a-7c ... Coil spring (elastic member)
8-10 ... Coil seat part 11 ... Sliding member 12 ... Compression coil spring 13 ... Convex seat part 14 ... Contact part 15 ... Bearing 16 ... Push nut 17 ... Scale

Claims (2)

In the lead-in wire support device for supporting the lead-in wire of the electric wire while being fixed to the building,
A support device body that is formed in a cylindrical shape and through which a wire connected to a part of the lead-in wire is inserted from one end;
A sliding member disposed in the main body of the support device, locking the proximal end of the wire, and movable in the longitudinal direction in the main body of the support device;
An elastic member disposed between the sliding member and one end of the support device body;
Holding means for pressing the sliding member at a predetermined angle and with a predetermined force to hold the sliding member at a predetermined position in the support device body;
And the holding means includes
A contact portion capable of contacting the sliding member;
A bearing formed on the abutting portion and abutting against the concave groove of the sliding member in a normal state;
A compression coil spring that urges the abutting portion in a direction to press against the sliding member;
Adjusting means for adjusting the pressing force of the abutting portion against the sliding member by arbitrarily adjusting the amount of compression of the compression coil spring;
The bearing rotates when a force of a predetermined level or more is applied to the lead-in wire to release the contact between the bearing and the concave groove, and
A cylindrical first housing portion that extends from the support device main body and has an open front end, and a second that can be screwed onto the front end side of the first housing portion to cover the opening of the first housing portion. A housing portion is provided, and the compression coil spring is housed in an internal space formed by the first housing portion and the second housing portion, and the screwing position of the second housing portion is arbitrarily adjusted. A lead-in wire support device, wherein the amount of compression of the compression coil spring is adjusted. Incoming line support device according to claim 1, wherein the scale for displaying the optimum screwing position of the second housing part the operator is provided on a side surface of the first housing portion.

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