JPH0881915A - Temporary fixing device of diagonal cable - Google Patents

Abstract

PURPOSE: To provide a device which is capable of fixing a diagonal cable temporarily by forming a two-divided inner pipe having an insertion hole which fits in a wedge mounted an a cable and a cable insertion through hole and an outer pipe having a through hole which enables the wedge to pass through. CONSTITUTION: A cable 5 is inserted into an outer pipe main body of temporary fixing devices A1 and A2 preliminarily suspended near an anchored portion of a main tower with wires 19 and 20 where an inner pipe 10 is installed into the outer pipe 11 of the device A1 and wedges 16 are inserted into an insertion hole 12. The cable 5 is temporarily fixed and supported with the device A1. Then, a covering material 5a of the cable 5 is peeled off, thereby exposing a strand 5b at a specified length. At the strand 5b, the device A2 is temporarily fixed, thereby taking out the inner pipe 10 of the device A1. Then, the wire 20 is loosened so that the strand portion 5b may be located at an insertion hole 4a of an anchor head 4, thereby fixing the position of the device A2. The wedges 16 of the device A1 are anchored at the insertion hole 4a by way of the through hole 15 of the device A1, thereby holding the strand 5b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temporary fixing device used when a diagonal cable, which is laid on a cable-stayed bridge or a suspension bridge, is laid between fixing portions.

[0002]

2. Description of the Related Art Conventionally, for example, in order to install a diagonal cable between the fixing portions of the main tower and the main girder of a cable-stayed bridge, it is necessary to install the cable as shown in FIGS.
As shown in FIG. 3, the cable 2 is sent from the drum 2 to the fixing unit 1 on the main tower side, the cable 5 is inserted into the through hole of the anchor head 4 of the fixing unit 1, and the fixing unit 6 on the main girder side is inserted. The cable 5 was installed.

Then, a cable is held by inserting a halved wedge into a through hole having a conical opening in the anchor head on the main tower side, and a center hole type jack or the like is used to hold the end of the cable. , Each cable was first tensioned and then the entire cable was secondarily tensioned to fix the cable to the anchor head.

[0004]

By the way, in the fixing section 1 on the main tower side, the cable 5 fed from the drum 2 is used.
Is installed between the fixing section 1 and the fixing section 6, the cable 5 is cut at a predetermined position, and when the covering material such as PE covering the strands which are the core wires is peeled off, the cable 5 It is necessary to refill the holding device in order to temporarily hold the cable with a jack or the like or to transfer the strand portion to the anchor head 4, which causes a problem that the temporary holding work of the cable 5 takes time and the construction period becomes long. there were.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a device capable of temporarily fixing a diagonal cable with a simple jig device.

[0006]

SUMMARY OF THE INVENTION An object of the present invention to solve the above problems and to achieve the above objects is a device for temporarily fixing one end of a diagonal cable, which comprises a wedge attached to the cable. , A split inner tube having a conical insertion hole into which a wedge attached to a cable is fitted and a through hole for inserting a cable communicating with the insertion hole, and the inner tube being one end side of the outer tube body A hollow portion that is installed from the opening of the through hole, a through hole that communicates with the hollow portion, is opened to the other end side of the outer tube body, and is formed to allow passage of the wedge attached to the cable; And an outer tube having a hook provided on a side surface of the outer tube main body.

Further, a flange for gripping the inner pipe is provided integrally with the main body of the inner pipe at the tip end side opening of the insertion hole of the inner pipe.

[0008]

According to the temporary fixing device of the present invention, the cable fed from the drum can be temporarily fixed, the cable can be cut and the covering material can be peeled off, and the wedge attached to the cable can be anchored. When mounting on the head, the inner tube of the temporary fixing device can be removed and the wedge still attached to the cable can be passed through the through hole of the outer tube to mount the wedge on the conical insertion hole of the anchor head. . Further, when removing the inner pipe from the outer pipe of the temporary fixing device, it is possible to easily attach and detach by grasping the flange.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings. It should be noted that the portions corresponding to the conventional example will be described with the same reference numerals.

As shown in FIG. 1, the first embodiment of the temporary fixing device A according to the present invention has an inner tube 10 for holding a wedge attached to a cable 5, and an inner tube 10 installed therein. At the same time, it is formed from the outer tube 11 which is locked by a locking tool provided on the fixing portion, a locking tool provided on the scaffold, and the like.

As shown in FIGS. 2 and 3, the inner tube 10 is made of steel, stainless steel, or other metal, and has a conical shape in which two or three wedges are fitted. An insertion hole 12 is provided, and a through hole 12a for inserting the cable 5 is further connected to the insertion hole 12 to be formed in two (10a, 10b).

A flange 13 for gripping the inner pipe 10 with a hand of an operator or the like is provided at the opening of the insertion hole 12 in the main body of the inner pipe 10 on the tip side.

The body of the inner tube 10 is formed in a rectangular shape as an example, but it may be formed in a circular shape.

Next, as shown in FIGS. 4 and 5, the outer tube 11 is made of steel, stainless steel or other metal, and the outer tube main body has a rectangular shape and a box shape having a hollow portion 14. The hook 11a is integrally provided on the side surface.

The hollow portion 14 is formed by the inner pipe 10
It is formed so that almost all of the body of the main body of the car is left inside.

Further, the hollow portion 1 is provided at the bottom of the outer tube body.
4 is provided with a through hole 15 that is open to the other end side of the outer tube body.

The diameter L1 of the through hole 15 is equal to that of the cable 5
Formed to have a larger outer diameter L2 than the wedges 16, 16 attached to the wedges 16 (see FIG. 6A).
6 together with the cable 5 can pass through the through hole 15.

Although the main body of the outer tube 11 has a rectangular shape as shown in FIG. 5, it may have a circular shape.

In the second embodiment of the present invention, although not shown, in FIG. 6, the through hole 15 of the outer tube 11 is made larger than the cross-sectional shape of the hollow portion 14 of the outer tube body, and the inner tube 10 is formed.
Is locked by the flange 13 at the tip of the outer tube body so as to be installed in the hollow portion 14. In this case, the outer tube body is a rectangular or circular tubular body.

In order to use the temporary fixing device A for the diagonal cable formed in this way, as shown in FIGS. 6 and 7, an operator riding on a bite scaffold 17 in the fixing section 1 on the main tower side. However, the cable 5 is inserted into the outer tube main bodies of the temporary fixing devices A1 and A2 suspended in advance by the wires 19 and 20 on the insert metal piece 18 fixed near the fixing unit 1.

Next, when the tip end side of the cable 5 reaches the fixing portion on the main girder side, the split inner tube 10 is placed inside the outer tube 11 on the temporary fixing device A1 side. And wedge 1
Insert 6, 16 into the insertion hole 12.

Further, a spring retaining ring 21 is mounted in the groove on one end side of the wedges 16, 16.

After the cable 5 is temporarily fixed and temporarily supported by the temporary fixing device A1 in this way, the cable 5 is cut at a predetermined position. Then, the covering material 5a having a required length is peeled off from the cut surface of the cable 5 to expose the strand 5b.

At the strand 5b portion, the temporary fixing device A2 is temporarily fixed in the same manner as described above. As a result, the cable 5 is supported by the temporary fixing device A2, and the temporary fixing device A1
In this case, since temporary cable support is not required, the wire 19 is loosened and the outer tube 11 is moved downward, and the main bodies 10a and 10b of the inner tube 10 of the temporary fastening device A1 are gripped by the respective flanges 13 to remove them. Remove from hollow section 14 of tube.

The wedges 16, 1 of the temporary fixing device A1
6 is attached to the cable 5 by the spring retaining ring 21 and does not fall.

The removed inner tube 10 is used as another outer tube for temporarily holding the cable.

Next, the wire 20 is loosened to temporarily fix the device A2.
Is gradually moved toward the anchor head 4 side.

Then, when the strand 5b portion of the cable 5 is positioned in the insertion hole 4a of the anchor head 4, the feeding of the wire 20 is stopped to temporarily fix the device A2.
Positionally fixed, and the wedges 16, 1 of the temporary fastening device A1
6 is passed through the through hole 15 of the temporary fixing device A1 to be fixed in the insertion hole 4a to hold the strand 5a. In this way, the wedges 16, 16 of the temporary fixing device A1 are fixed to the anchor head 4 as they are.

Next, the wire 20 is loosened again to remove the inner tube 10 of the temporary fastening device A2, and the wedges 16, 16 of the temporary fastening device A2 are also removed by removing the spring retaining ring 21.

Then, the outer tubes 11 of the temporary fastening devices A1 and A2 are moved to the cut surface side of the strand 5b and removed from the cable 5.

Thus, the temporary fixing device according to the present invention is
When the diagonal cable 5 is cut and the covering material is peeled off at the fixing section, the cable can be temporarily fixed with a simple device, and the temporary fixing device can be easily removed. The efficiency of the above work is improved.

[0032]

As described above, the temporary fixing device for a diagonal cable according to the present invention is a device for temporarily fixing one end portion of the diagonal cable, and is used for the wedge attached to the cable and the cable. A halved inner pipe having a conical insertion hole into which the attached wedge is fitted and a through hole for inserting a cable, which communicates with the insertion hole, and the inner pipe has an opening at one end side of the outer pipe body. A hollow portion that is internally mounted from the outer tube body, a through hole that communicates with the hollow portion, is opened at the other end side of the outer tube body, and is formed to allow passage of the wedge attached to the cable; An outer tube having a hook provided on the side surface of the cable, which facilitates the cutting work of the cable in the fixing unit, and the work efficiency is improved without the need to re-seat the cable support device. Play.

In addition, a flange for gripping the inner tube is integrally provided at the opening on the tip side of the insertion hole of the inner tube of the temporary fastening device so that the inner tube body is integrally formed. It has an excellent effect that the pipe can be easily removed.

[Brief description of drawings]

FIG. 1 is a front view of a first embodiment of a temporary fixing device according to the present invention.

FIG. 2 is a front view of an inner tube of the temporary fixing device.

FIG. 3 is a perspective view of one of the inner tube main bodies obtained by dividing the inner tube into two parts.

FIG. 4 is a front view of the outer pipe, in which a part of the outer pipe is cut away.

5 is a cross-sectional view taken along line I-I of FIG.

FIG. 6 is a vertical cross-sectional view (a) showing a use state of the temporary fixing device according to the first embodiment and a perspective view (b) of a spring retaining ring.

FIG. 7 is an explanatory view (a) of a usage state of the temporary fixing device according to the first embodiment and a partial detailed view (b) thereof.

[Fig. 8] Fig. 8 is an explanatory diagram for explaining the erection status of the cable of the cable-stayed bridge.

[Fig. 9] Fig. 9 is an explanatory diagram for explaining a erection state of a diagonal cable according to a conventional example.

[Explanation of symbols]

 1 main tower side fixing part, 2 drums, 3 cable feeder, 4 anchor head, 4a insertion hole, 5 carble, 6 main girder side fixing part, 10 inner tube, 11 outer tube, 11a hook, 12 insertion hole, 12a Through hole, 13 Flange, 14 Hollow part, 15 Through hole, 16 Wedge, 18 Insert hardware, 19,20 Wire, 21 Spring retaining ring, A, A1, A2 Temporary fixing device.

Front page continuation (72) Inventor Akiyoshi Suzuki 12-2 Nibancho, Chiyoda-ku, Tokyo Esu Co., Ltd. (72) Inventor Watari Ohashi 12-12 Nibancho, Chiyoda-ku, Tokyo Esu Co., Ltd. (72) Inventor Akira Hirayama 12 Nibancho, Chiyoda-ku, Tokyo Esu Co., Ltd. (72) Inventor Masamitsu Takei 1 Niihamacho, Chuo-ku, Chiba-shi, Chiba Prefecture Kawatetsu Techno Wire Co., Ltd. (72) Inventor Shigeo Shoji Chiba Kawahama Techno Wire Co., Ltd., 1 Niihamacho, Chuo-ku, Chiba City (72) Inventor Kimio Mine 2-3 2-3 Uchisaiwaicho, Chiyoda-ku, Tokyo 2-3 2-3 Uchisaiwaicho, Chiyoda-ku Kawasaki Steel Co., Ltd. Tokyo headquarters (72) Inventor Shigeki Nakamura 2-3-2 Uchisaiwaicho, Chiyoda-ku, Tokyo Kawasaki Steel Co., Ltd.

Claims (2)

[Claims] 1. A device for temporarily fixing one end of a diagonal cable, comprising a wedge attached to the cable, a conical insertion hole into which the wedge attached to the cable is fitted, and the insertion hole. A split inner tube having a through hole for communicating a cable, a hollow portion in which the inner tube is installed from an opening on one end side of the outer tube body, and an outer tube body communicating with the hollow portion An outer tube having a through hole formed on an end side to allow passage of the wedge attached to the cable and a hook provided on a side surface of the outer tube body. Temporary fixing device for diagonal cable. 2. The slant according to claim 1, wherein a flange for gripping the inner pipe is provided integrally with the main body of the inner pipe at an opening portion on the tip side of the insertion hole of the inner pipe. Temporary fastening device for material cables.