JPH083129Y2 - Presser bracket device for wire drawing work - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a holding metal fitting device for an old wire which is used when a new wire is extended all at once by using an existing old wire. .

[Prior Art] A method of drawing wires in a plurality of spans at once is known from Japanese Patent Application Laid-Open No. 62-260509. This reference uses, as shown in FIG. 2, a support fitting H that is suspended from a steel tower and is provided with a roller for the old line, and a carrier T that can be transported along the old line. The carrier T is a rotatable star wheel S having an upper guide body U on an upper part thereof and a lower guide body L on a lower part thereof slidably engaged with the star wheel by an arc. Is provided with a roller that rolls on the old line, and the lower guide body L is provided with a roller that supports the new line. By pulling the star wheel S, the lower new line can be extended. When the carrier T passes through the support fitting H, there is no contact portion of the support fitting into the inter-tooth gap of the star wheel S, so there is no obstacle to the passage. This structure is the second reference
As can be seen from the figure, it is effective only when the old line (GW) has an appropriate downward inclination with respect to the support fitting H, that is, when the tension applied to the old line presses down the support fitting.

However, this condition may not be met in the extended line section. For example, when attempting to extend a wire from a high tower to another high tower through a low tower, the old line tries to lift a floating support fitting from a roller of a support fitting provided in the low tower. Since the carrier T is guided by the floating old line, it interferes with the support fitting H and cannot pass through it.

[Measures to solve the problem] Hold the old line at two points with an appropriate distance in front of and behind the support bracket so that the old line is located almost horizontally in that section. For this reason, the device in which the holding metal fitting is incorporated is held by a rope to a fixed object below (for example, near the insulator of the transmission line below).

[Examples] The drawings will be described. Currently the old line of GW (overhead ground line)
Since there is a sudden movement to replace the new OPGW (optical fiber line), this case will be taken as an example. As shown in FIG. 1, the frame 1 has a U-shape, and the end portion of one leg is a gate bar 3 which is swingable around a shaft 2. The holding metal fitting is a pair of parallel strip-shaped bearing plates 4 and a plurality of rollers 5 supported axially, and is located at the center of both ends of the frame at right angles to both legs. One end of each of the pair of support rods 6 is fixed to the bearing plate 4, and an end plate 7 is fixed to the other end of the pair of support rods 6 so that they are bilaterally symmetrical. The connecting rod 8 connects the pair of supporting rods 6 at the upper part. Two
One of the end plates 7 is pivotally attached to one end of the frame 1 by a bolt, and the other end plate 7 is locked to an end of the gate bar 3 via a locking device K.

The locking device K comprises a pin 7a, a pocket 9 and a key 10. The pin 7a is implanted in the end plate 7 and has an annular groove 7b near the outer end. The U-shaped cross-section pocket 9 is fixed to the gate bar 3 at both legs, leaving a slight gap. A window 9a having a shape in which two upper and lower circles having the same radius are connected by a communication path is formed in the plate surface. The key 10 is a plate that can be inserted into the above-mentioned gap,
10a is screwed, and a gourd-shaped window 10b is provided on the upper part. FIG. 3 shows a case where the key 10 is pushed down and the small diameter portion of the window 10b is engaged with the annular groove of the pin 7a to prevent the gate bar from coming off. When the key 10 is pushed up, this engagement is released,
The gate bar can be pulled out by the large diameter portion of the window 10b. The head of the knob 10a can be fitted to the upper and lower holes of the window 9a, but if the screw is loosened to some extent, the leg of the knob can move the communication passage. That is, if one of the upper and lower hole positions is selected and the knob is screwed in, the head is obstructed by the narrow communication passage, so there is no risk of shifting to another hole position.
A pull tab 1a is provided at an appropriate position on the lower side of the frame 1 and a rope R is hung down. Since the new line and the old line will pass through the space surrounded by the U-shaped frame and the support rod, a soft protective plate N is detachably attached to the lower surface of the frame.
It is desirable to insert a rotatable protection tube (not shown) in the shaped frame and the support rod. It is a means to keep the performance of OPGW. The guide roller 11 is each support rod 6
It is rotatably attached to the front and the rear to minimize the resistance when the new wire comes into contact with the support rod 6 during the wire drawing work.

[Operation] First, the knob 10a of the key 10 is loosened, lifted upward from below the large diameter portion of the through hole formed in the pocket 9, and then tightened and fixed again. Open the gate bar 3 outward and open the old line GW
Is fed into the frame, positioned on the lower surface of the roller 4, and after closing the gate bar, the key 10 is lowered and locked.

Next, pull the rope R downward against the pushing force of the old line GW,
Lock the lower end of the rope to the fixed object so that the holding metal fitting is at the predetermined position. Fig. 4 shows the case where the lower end is locked near the insulator line of the lower transmission line.

When the towing wire W is towed in this state, the carrier T is controlled in the entering gradient, and therefore, the carrying device T enters and passes through the support fitting in the state of the chain line in FIG. Since the support rod 6 fits into the interdental space of the star wheel S, it does not hinder passage.

[Effect] In the wire drawing method using the support metal fittings and the carrying device, by using the present invention together, it is possible to smoothly proceed the wire drawing even if the front and rear old lines of the support metal fittings have an upward slope.

[Brief description of drawings]

FIG. 1 is a front view of the present invention, FIG. 2 is a side view of the same, FIG. 3 is an explanatory view of a locking device, FIG. 4 is a parts diagram of a locking member, and FIG. 1 ... frame, 2 ... axis, 3 ... gate bar, 4 ...
Bearing plate, 5 ... Roller, 6 ... Support rod, 7 ... End plate, 8
...... Connecting rod, 9 ...... pocket, 10 ...... key, 11 ...... guide roller, K …… locking device, H …… supporting metal, T …… carrying machine, S …… star wheel, U, L… ... upper and lower guide body, GW ... old line, OPGW ... new line, N ... protection plate, R ... rope, W ...
… Wire.

Front page continued (72) Inventor Toshihiko Eguchi 2-82 Watanabe-dori, Chuo-ku, Fukuoka, Fukuoka Prefecture Kyushu Electric Construction Co., Ltd. (72) Inventor Masaru Nonohara 6-5-19 Minami-Shinagawa, Shinagawa-ku, Tokyo Sanwa Techchi Co., Ltd. (72) Inventor Toshiaki Kodama 1-1-1, Watanabe-dori, Chuo-ku, Fukuoka-shi, Fukuoka Sanwa Techchi Co., Ltd. Fukuoka Sales Office (72) Tadashi Fujii Shimotakino, Takino-cho, Kato-gun, Hyogo Prefecture 4-62, Fujii Electric Works Co., Ltd.

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. A support for a rectangular frame body suspended from a steel tower and provided with an old wire support roller at its lower end, and a carrier in which guide bodies are incorporated above and below a star car, to extend a plurality of spans at once. A U-shaped frame used in a possible wire-drawing method and provided with a gate part that can be opened and closed at one leg end, and a pair of opposed strips located at the center of both leg ends orthogonal to the line connecting both leg ends of the frame A holding metal fitting provided with a roller that can be engaged with the receiving plate on the lower line with the old line, and a pair of left and right support rods pivotally attached to one end of the holding metal fitting at one end and to the two leg ends of the U-shaped frame at the other end. And a rope which is hung from the lower side of the frame and whose lower end is fixed to a fixed object, and the pressing metal fitting is positioned substantially on the same horizontal line as the roller of the supporting metal fitting.