JP6857901B2 - Strap push-up tool - Google Patents

Description

The present invention relates to a strap pushing tool capable of attaching a metal fitting extending to the arm of a utility pole without removing the strap of a pin insulator or a strain insulator.

In utility poles for power transmission and distribution lines, pin insulators are used to fix jumper wires to the arms laid horizontally on the utility poles.

FIG. 7 is a perspective view showing an installation state of the conventional high-voltage underline retention device 200. A high-voltage pull-down wire withdrawal hardware 202 is used to fix the high-voltage withdrawal line withdrawal insulator 201, which holds the three high-voltage withdrawal lines in a separated state, to the arm 210. The high-voltage line retainer 202 is inserted into the gap formed by loosening and lifting the fixing nut of the shaft 212a of the high-voltage pin insulator 212.

The high-voltage underline retaining metal 202 has an L-shaped notch 203a formed in the mounting flat plate 203 attached to the arm 210. Then, the L-shaped notch 203a is inserted into the gap formed by loosening and lifting the fixing nut of the shaft 212a of the high-voltage pin insulator 212. When the high-voltage pull-down wire retainer 202 is sandwiched between the high-voltage pin insulator 212 and the arm 210 in this way and then the fixing nut is tightened, the high-voltage pull-down wire retainer 202 becomes stable.

Patent Document 1 describes such a high-voltage underline retention device 200.

Japanese Unexamined Patent Publication No. 2016-59215

As the wiring method of the transmission line, in addition to the pull-through type as shown in FIG. 7, there is a retention type.

FIG. 8 is a perspective view showing the periphery of an arm with a pin insulator attached to a retention type utility pole.

A strain insulator 102 and a retention clamp 104 are used for such a retention column. The electric wires 110 arranged on the left and right sides of the utility pole 100 are connected by jumper wires 111 passed between the retaining clamps 104. The left and right retaining clamps 104 are fixed to the arm 101 via the strain insulator 102 and the strap 103, respectively.

The strap 103 is attached so that two upper and lower parts sandwich the arm 101 up and down. The pin insulator 105 for the jumper wire 111 is erected so as to penetrate the strap 103 and the arm 101. The jumper wire 111 described above is fixed to the recess 105a formed at the upper end of the pin insulator 105.

Here, as in the configuration of FIG. 7, when the high-voltage underline is installed, the extension hardware 107 as shown by the dotted line in FIG. 8 is required. The illustrated extension hardware 107 is a channel material having a U-shaped cross section to which the pin insulator 106 for the underline (not shown) can be fixed.

However, in the case of the retaining column as shown in FIG. 8, in addition to the strap 103 interposed between the arm 101 and the pin porcelain 105, tension is generated in these straps 103, so that the pin porcelain Even if the fixing nut 105 (below the arm 101) is loosened and lifted, the strap 103 becomes an obstacle and the extension metal piece 107 cannot be inserted.

Further, in the vicinity of the utility pole, the work space is limited because the electric wires 110 and the pole equipment are congested, and a plurality of workers can safely cooperate with the work of lifting the pin insulator 105 and the work of lifting the strap 103. Is difficult (there are many concerns about safety).

Therefore, an object of the present invention is to provide a strap pushing tool capable of inserting an extended metal fitting between an arm and a pin insulator without removing the strap.

In order to achieve the above object, the strap push-up tool of the present invention is a strap push-up tool that pushes up the upper part of the strap for fixing the strain insulator, which is arranged so as to sandwich the arm metal up and down. A mounting portion that is arranged so as to face each other on both side surfaces and on which the upper part can be mounted, a bridge portion that connects one end side of the previously described mounting portion, and a extending downward from the bridge portion side of the previously described mounting portion. It is characterized by having a support portion.

Further, in the strap pushing tool of the present invention, in addition to the above configuration, at least one of the support portion and the above-mentioned resting portion is provided with a spacer inside for forming a gap between the support portion and the arm metal. It is characterized by being.

Further, the strap pushing tool of the present invention is characterized in that, in addition to the above configuration, the support portion is provided with a connecting portion to which a remote control rod can be connected.

As described above, according to the present invention, when the mounting portion is inserted below the upper part of the strap and the bridge portion is arranged on the upper surface of the arm near the upper part, the supporting portion extending downward is the bridge portion. By rotating the mounting portion from the side in the extending direction (strap side), the upper part is lifted to the mounting portion by the action of a lever with the bridge portion as a fulcrum.

As a result, a gap for inserting the metal fitting to be extended from the arm can be formed between the strap and the upper surface of the arm, so that the extension work can be performed without disassembling. The time can be greatly reduced.

Further, according to the present invention, in addition to the above effects, when the bridge portion is placed on the upper surface of the arm metal, a gap is formed between the mounting portion and the side surface of the arm metal by the spacer. It becomes easy to insert a metal fitting having a U-shaped cross section that covers the upper side of the gold.

Further, according to the present invention, in addition to the above effects, it is possible to operate from a bucket vehicle or the ground by replacing the remote control rod according to the working environment.

It is a perspective view of the strap push-up tool which concerns on embodiment of this invention. It is the state of use of the strap push-up tool of FIG. 1, (a) shows the arrangement state, and (b) is the partially enlarged perspective view of (a). It is a perspective view which looked at the use state of the strap push-up tool of FIG. 1 from the side. The usage state of the strap pushing tool of FIG. 1 is shown, (a) is a front view showing a state before lifting, and (b) is a front view showing a state after lifting. It is a side view of the strap push-up tool of FIG. FIG. 3 is a perspective view of a strap pushing tool showing a state in which the strap is arranged on an arm having a size different from that of FIG. It is a perspective view which showed the installation state of the conventional high-voltage underline retention device. It is a perspective view which shows the periphery of the arm metal which attached the pin insulator to the retention type utility pole.

Hereinafter, the strap pushing tool according to the embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is an overall perspective view of a strap pushing tool according to an embodiment of the present invention. The operation rod 12 that can be combined with the strap push-up tool 1 is represented by a two-dot chain line.

In the strap pushing tool 1, two fork-shaped mounting portions 4 arranged in parallel are connected by a bridge portion 2 on one end side. A support portion 6 extends diagonally downward below the mounting portion 4 on the side where the bridge portion 2 is provided. On the lower end side of the support portion 6, there is a connecting portion 8 that can be connected to the operation rod 12 when used in remote control. Since the connecting portion 8 is provided on each of the two supporting portions 6, it can be replaced according to the working environment. In the configuration according to the present embodiment, the connecting portion 8 has a male screw structure. Further, inside the support portion 6, spacers 10 are provided at two locations, respectively (only one of them appears in FIG. 1).

Next, FIG. 2 shows a usage state of the strap pushing tool 1 having such a configuration.

FIG. 2 is a perspective view showing a usage state of the strap pushing tool 1 with respect to the retaining column, FIG. 2A shows an overall image of the arrangement state, and FIG. 2B shows two points in FIG. 2A. An enlarged view of the part surrounded by the chain line is shown. Here, in order to make it easier to understand the structure of the strap push-up tool 1, the peripheral configurations other than the arm metal 101 are represented by dotted lines.

With reference to FIG. 2A, the strain insulators 102 are symmetrically arranged with the arm 101 in between. Each strain insulator 102 is fixed by a strap 103 so as to sandwich the arm 101 up and down. These straps 103 are composed of a combination of the upper part 103a and the lower part 103b. The jumper wire 111 connecting the retaining clamps 104 connected to the respective strain insulators 102 is fixed to the recess 105a at the upper end of the pin insulator 105 erected so as to penetrate the two sets of straps 103 and the arm 101. There is.

By the way, the shape of the transmission / distribution line changes in various ways according to the change in the surrounding environment. For example, when it becomes necessary to provide a high-voltage underline, it is necessary to support a plurality of high-voltage underlines while maintaining a safe interval. At this time, extension hardware for extension to existing equipment is used. FIG. 2A shows an example in which the extension metal piece 107 of the channel material having a U-shaped cross section is used to support the pin insulator 106 for the underline.

The strap pushing tool 1 according to the present embodiment can push up the strap 103 by loosening the fixing nut 105b below the pin insulator 105 arranged in this way. Then, the strap 103 can be pushed up and the extended metal fitting 107 can be inserted into the gap formed between the strap 103 and the arm metal 101.

With reference to FIG. 2B, the strap pushing tool 1 is inserted and arranged so that the mounting portion 4 is in contact with the lower side of the upper part 103a constituting the strap 103. At this time, the lower surface of the bridge portion 2 is in contact with the upper surface 101a of the arm metal 101. Further, the inner surface of the mounting portion 4 is arranged so as to face the both side surfaces 101b of the arm metal 101. The support portion 6 is shown in a state in which the operation rod 12 is connected. When the operation rod 12 is used in this way, the work from a bucket car or the like becomes easy.

In this arrangement, when the fixing nut 105b of the pin insulator 105 is loosened and the operation rod 12 is rotated so that the mounting portion 4 is lifted with the bridge portion 2 as a fulcrum, the upper part 103a of the strap 103 is operated. At the same time, the pin insulator 105 is lifted. Next, FIG. 3 shows how the upper part 103a of the strap 103 and the pin insulator 105 are lifted.

FIG. 3 is a side perspective view showing the usage state of the strap pushing tool 1. Here, the arrangement of the strap pushing tool 1 before lifting is shown by overlapping with a virtual line. As described above, when the strap pushing tool 1 according to the present embodiment is used, a gap is formed between the arm arm 101 and the strap 103 without disassembling the strap 103 and the pin insulator 105 for fixing the strain insulator 102. Because it can be done, the work time is greatly reduced.

Further, as shown in FIGS. 2 and 3, when the tension insulators 102 are symmetrically arranged via the arm metal 101, the tensions applied to the pin insulators 105 from each are in a balanced state, so that they are upward. It can be easily lifted just by applying force. Subsequently, the lifting operation of the strap 103 will be described from the front view.

4A and 4B are views of the lifted state of the strap 103 as viewed from the front side, FIG. 4A shows a state before lifting, and FIG. 4B shows a state after lifting.

With reference to FIG. 4A, the strap pushing tool 1 according to the present embodiment is designed to have a size such that a gap is provided between the mounting portion 4 and the arm metal 101 arranged so as to face each other. .. Two spacers 10 that can fill this gap are provided inside the support portion 6. The spacer 10 is set to a size that does not interfere with the mounting portion 4 when it is inserted, even when an extended metal fitting 107 having a U-shaped cross section (see FIG. 2) as shown in FIG. 2 is used. ing.

Next, with reference to FIG. 4B, a state in which the tip of the mounting portion 4 is lifted with the bridge portion 2 as a fulcrum by the rotation operation of the operating rod 12 is shown. As a result, a gap is formed on both side surfaces 101b and the upper surface 101a side of the arm metal 101, and the extended metal fitting 107 can be inserted. Subsequently, the operational stability of the strap push-up tool 1 will be described with reference to FIG.

FIG. 5 is a side view of the strap pushing tool 1 arranged on the arm metal 101.

As described above, in the configuration according to the present embodiment, two spacers 10 are provided inside the support portion 6. In FIG. 5, the direction of the arrangement is shown by superimposing the alternate long and short dash line on these spacers 10.

As can be seen in FIG. 5, the support portion 6 is arranged so as to be inclined diagonally downward with the upper surface of the mounting portion 4 horizontal. The spacer 10 is also arranged along the direction in which the support portion 6 is inclined. As a result, each spacer 10 is offset with a distance D1 in the front-rear direction. Further, in the height direction, the distance D2 is set and offset.

That is, the spacers 10 provided so as to be offset in the front-rear direction and the height direction can prevent the tip of the mounting portion 4 from swinging and stabilize it.

Further, when the operation rod 12 is rotated so that the tip of the spacer 10 is slidably contacted with the side surface 101b of the arm metal 101, a gap corresponding to at least the protruding height of the spacer 10 is formed with the mounting portion 4. The distance from the side surface 101b is corrected. Therefore, the mounting portion 4 can be corrected to an appropriate arrangement by performing a preliminary rotation operation before lifting, so that the work is performed by interfering with the extension hardware 107 (see FIG. 2) after lifting. It is possible to prevent redoing.

Next, FIG. 6 shows the arrangement state of the arms 112 having different cross-sectional shapes. FIG. 6 is a perspective view showing an example of use for a type of arm 112 having a width narrower in the horizontal direction than the arm 101 shown in FIG.

In the configuration according to the present embodiment, a concave groove 2a is formed on the lower surface of the bridge portion 2 in parallel with the extending direction of the mounting portion 4. As a result, as shown in FIG. 6, it can be used even for a narrow arm 112.

The configuration described above is an embodiment of the present invention, and includes the following modifications.

In the above embodiment, the spacer 10 is shown as an example of the configuration provided in the support portion 6. However, as long as the bridge portion 2 is unevenly arranged on the side where the bridge portion 2 is formed, the bridge portion 2 may be formed on the mounting portion 4 side.

In the above embodiment, two spacers 10 are provided on each support portion 6 as an example. However, as long as it is arranged so as to spread in the front-rear direction and the vertical direction, it may be a ridge formed along the support portion 6.

In the above embodiment, the strap push-up tool 1 is shown as an example of a configuration in which the strap pushing tool 1 is formed symmetrically in a mirror plane. However, the lengths of the mounting portions 4 do not have to be the same. Further, the support portion 6 may be provided on at least one side.

In the above embodiment, a configuration in which two mounting portions 4 are arranged in parallel is shown as an example. However, in addition to the parallel arrangement, a configuration in which the distance is widened toward the tip may be used.

In the above embodiment, a configuration in which the bridge portion 2 is formed at one end of the mounting portion 4 is shown as an example. However, it does not have to be formed at the end portion as long as the arrangement is biased from the center to one side in the extending direction of the mounting portion 4.

In the above embodiment, an example is shown in which the connecting portion 8 of the supporting portion 6 is composed of a male screw. However, a female screw structure or a twist lock type connection structure may be used.

Since the strap pushing tool of the present invention can form a gap between the strap and the arm while the strap is under tension, it is also useful for a strap-only terminal configuration without a pin insulator.

1 Strap push-up tool 2 Bridge part 2a Concave groove 4 Mounting part 6 Support part 8 Connecting part 10 Spacer 12 Operation rod 100 Utility pole 101 Arm 101a Top surface 101b Side surface 102 Strain insulator 103 Strap 103a Upper part 103b Lower part 104 Retention clamp 105 pin insulator (for jumper wire)
105a recess (upper end of pin insulator for jumper wire)
105b Fixing nut 106 pin insulator (for underline)
107 Extended hardware 110 Electric wire 111 Jumper wire 200 High-voltage underline retaining device 201 High-voltage underline retaining porcelain 202 High-voltage underline retaining hardware 203 Mounting flat plate 203a Notch 210 Arm metal 212 High-voltage pin insulator 212a Axis

Claims (3)

It is a strap pushing tool that pushes up the upper part of the strap for fixing the strain insulator, which is placed with the arm metal sandwiched between the top and bottom.
A mounting portion that is arranged so as to face both side surfaces of the arm and on which the upper part can be mounted, and a mounting portion.
The bridge part that connects one end side of the above-mentioned placement part and
A strap push-up tool including a support portion extending downward from the bridge portion side of the above-described resting portion. The strap pushing tool according to claim 1, wherein at least one of the support portion and the above-mentioned resting portion is provided with a spacer on the inside for forming a gap between the support portion and the arm metal. The strap pushing tool according to claim 1 or 2, wherein the support portion is provided with a connecting portion to which a remote control rod can be connected.

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