JPH062056Y2 - Hydraulic tensioner for branch lines - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a hydraulic tension line for branch lines, and particularly when an electric pole is constructed, the anchor near the head of the electric pole and the lower part are buried in the ground. The present invention relates to a branch-type hydraulic tensioner for tensioning a branch line when a winding grip material is interposed between the rod and the rod for binding.

"Prior Art" Various types of conventional wire tensioners for this kind of branch line are known. However, all of them are different from each other only in their detailed configurations, and are provided with two sets of ratchets and ratchet wheels. With a ratchet puller that can be wound with a wire rope by tilting back and forth,
This is a combination of a ratchet puller and a pulley to which tensile force is applied by winding a wire rope. For example, as shown in FIG. 7, there is a latest one that has been recently developed and has been put on the market, but this tensioner for branch lines is constructed by first burying the lower part of the anchor rod 1 in the ground, The rod grip 2 is fixed to the tip of the anchor rod 1 exposed on the surface of the ground. Next, the chuck 3 chucks the pulling side of the branch line 9. The branch line 9 is attached near the head of the utility pole.
If the lever 4a of the ratchet puller 4 is tilted back and forth in this state, the first wire rope 5 is wound. First
One end of the wire rope 5 is hooked on the ratchet puller 4, and after being wound on the small pulley 6, the other end is wound around the shaft of the ratchet puller 4. The small pulley 6 is hooked on one end of the second wire rope 7. The second wire rope 7 is hooked on the large pulley 8 and then the other end is hooked on the rod grip 2. The chuck 3 is attached to the large pulley 8. Therefore, when the first wire rope 5 is wound around the ratchet puller 4, the large pulley 8 pulls the branch line 9 through the chuck 3 in order to pull the second wire rope 7 through the small pulley 6. To do. When the branch line 9 is tensioned by this, the center portion of the winding grip material 10 is hung on the ring portion 1a at the tip of the anchor rod 1 with the ring material 11 interposed, and then the winding grip material 10 is wound around the branch line 9. wear. Winding grip material 1
After the winding of No. 0 is completed, the rod grip 2 is removed from the anchor rod 1 and the chuck 3 is removed from the branch line 9, so that the tensioning operation of the branch line 9 is completed. The winding grip member 10 has a rough winding surface so as to prevent slippage, and when winding around the branch line 9 is completed and the rod grip 2 and the chuck 3 are removed, the tension of the branch line 9 is reversed. By force, the winding surface grips the branch line 9.

[Problems to be solved by the invention] However, the conventional wire tensioner for branch lines is not limited to the one shown in FIG. 7, and any of them uses a wire rope and a pulley. There is a problem that it is difficult to work because the wire rope gets in the way when winding the material around the branch line. That is, as shown in FIG. 7, when the winding grip material 10 is wound around the branch line 9 after the branch line 9 is tensioned by the ratchet puller 4, the winding grip material 10 is wound.
However, there is a problem that the work space is restricted due to the presence of the second wire rope 7, the winding work is difficult, the weight is heavy, the shape is bulky, and the handling is difficult.

Therefore, in view of the above circumstances, the present invention provides a hydraulic tensioner for a branch line, which allows the winding work of a winding grip material to be wound around the branch line very easily after the tension of the branch line, and is small and lightweight. The purpose is to do.

[Means and Actions for Solving the Problem] In order to achieve the above object, the present invention first fixes a hydraulic cylinder to the tip of an anchor rod whose lower part is buried in the ground,
Chuck the pulling side of the branch line to the chuck at one end of the tail rope, then operate the hydraulic cylinder,
The pulley is moved downwards, which pulls the tail rope and tightens the branch line chucked to the chuck. After the tension of the branch line, the wrapping grip material hung on the anchor rod can be wrapped without hitting other members such as the rope of the tail, etc.

[Embodiment] An embodiment of a hydraulic tensioner for branch lines according to the present invention will be described below with reference to the drawings. In FIGS. 1 and 2, 21
Is a hydraulic cylinder. The hydraulic cylinder 21 has attachments 23 and 24 to the anchor rod 22 at the base and the tip. As shown in FIGS. 2 and 4, the attachment 23 is configured such that the wedge-shaped movable piece 23a is movable with a certain inclination angle with respect to the seat surface of the receiving seat 23b. The movable guide of the wedge-shaped movable piece 23a is performed by a pin 23c attached to the receiving seat 23b and a guide groove 23d formed in the wedge-shaped movable piece 23a. The other fitting 24, as shown in FIGS. 2 and 3,
The tightening seat 24b is movable with respect to the receiving seat 24a by a butterfly bolt 24c. The hydraulic cylinder 21 has a connection port 26 for connecting to the hydraulic pump 25. The hydraulic pump 25 is not limited to the one shown in FIG. 2, but various types can be used. The piston rod 27 of the hydraulic cylinder 21 moves from the hydraulic pump 25 to the hydraulic cylinder 2
When the pressure oil is sent to the inside of the hydraulic cylinder 1, it expands, and when the sending of the pressure oil is released, the return spring 28 in the hydraulic cylinder 21 returns. A rotatable wheel 29 is attached to the tip of the piston rod 27. The pulley 29 has a first
As shown in FIGS. 5, 5 and 6, the tail rope 30 is hung around. One end of the tail rope 30 is hooked on a pin 31 at the base of the hydraulic cylinder 21. The other end of the tail rope 30 is connected to a chuck 33 via a joint 32 that freely rotates. The chuck 33, like the attachment 23,
It comprises a seat 33a and a wedge-shaped movable piece 33b that slides at an angle of inclination with respect to the seat surface of the seat 33a, and the tail rope 3 via the joint 32 to the wedge-shaped movable piece 33b.
Connect 0. As the chuck 33, other than the above-mentioned type, a commercially available one can be used.

Next, a method of using the hydraulic line tensioner for branch lines having the above-described configuration will be described. First, the lower part of the anchor rod 22 is embedded in the ground near the constructed electric pole. Anchor rod 2
The hydraulic cylinder 21 is fixed to the tip portion of the second protruding from the surface of the earth in a direction in which the pulley 29 is located on the lower side. When fixing the hydraulic cylinder 21 to the anchor rod 22,
The anchor rod 22 is sandwiched between the receiving seat 23b of the fixture 23 and the wedge-shaped movable piece 23a, and the fixture 2
In 4, the anchor rod 22 is tightened and fixed to the receiving seat 24a by the tightening seat 24b. Fixture 23
Simply clamps the anchor rod 22 between the seat 23b and the wedge-shaped movable piece 23a.
The wedge-shaped movable piece 23a reliably clamps the anchor rod 22 against the seat 23b in accordance with the pulling. When fixing the attachment 23 to the anchor rod 22, as shown in FIG. 2 and FIG.
Apply the jaw 22b of 2a to the base of the hydraulic cylinder 21,
It is prevented that the branch line 34 is accidentally pulled out when the branch line 34 is pulled. Next, the chuck 33 chucks the pulling side of the branch line 34. Needless to say, the base end of the branch line 34 is bound near the head of the utility pole. On the other hand, the hydraulic cylinder 21 has a pressing oil pump 25
Connect. Then, the hydraulic pump 25 causes the hydraulic cylinder 2 to
If you send pressure to 1 and extend the piston rod 27,
The pulley 29 descends. When the pulley 29 descends, the tail rope 30 is attached to the joint 3 by a length twice the descending stroke.
The branch line 34 is pulled through the 2 and the chuck 33. At this time, the pulling force of the chuck 33 with respect to the branch line 34 is, on the contrary, half of the output of the hydraulic cylinder 21. For example, when the output of the hydraulic cylinder 21 is 6 tons, the tensile force of the chuck 33 with respect to the branch line 34 is 3 tons. Since the pulley 29 is attached to the piston rod 27 and descends toward the ground side to pull the branch line 34, when the branch line 34 has a predetermined tension, the chuck 33 moves the ring portion of the anchor rod 22. It descends to a lower position than 22a. Next, the ring member 3 is attached to the ring portion 22a of the anchor rod 22.
After the center portion of the winding grip material 36 is hooked with 5 interposed, the winding grip material 36 is wound around the branch line 34 located above the chuck 33. The winding work of the winding grip material 36 around the branch line 34 can be performed without getting in the way by hitting another member such as the tail rope 30. After the winding work of the winding grip material 36 around the branch line 34 is completed, the chuck 33 is detached from the branch line 34,
When the hydraulic cylinder 21 is removed from the anchor rod 22, all the work of tensioning the branch line 34 is completed.

[Advantage of Invention] As described above, according to the hydraulic tensioner for a branch line according to the present invention, after tension of the branch line, when winding the gripping material around the branch line, it hits other members such as a wire as in the conventional case. It does not get in the way, the winding work is extremely easy, the setup work when pulling the branch line is also easy, and it is small and lightweight, which is convenient for handling.

[Brief description of drawings]

FIG. 1 is a front view of a hydraulic tensioner for branch lines according to the present invention, FIG. 2 is a longitudinal sectional view of the hydraulic tensioner for branch lines, and FIG. 3 is a sectional view taken along line I-I of FIG. FIG. 4 is a sectional view taken along line II-II of FIG.
FIG. 5 is a front view showing a state where a hydraulic cylinder is attached to a branch line, FIG. 6 is an explanatory view showing a state where the branch line is pulled, and FIG. 7 is a perspective view showing a use state of a conventional branch line tensioner. . 21 ... Hydraulic cylinder, 22 ... Anchor rod 25 ... Hydraulic pump, 27 ... Piston rod 29 ... Pulley, 30 ... Hand rope 33 ... Chuck, 34 ... Branch line 36 ... Winding grip material

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Hideyuki Kozu 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Ichimori Kitahara 1-1-1 Uchiyuki-cho, Chiyoda-ku, Tokyo No. 6 Nihon Telegraph and Telephone Corporation (72) Inventor Shigeru Iura 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Inventor Takatoshi Sunahara 3039, Sasaga, Matsumoto-shi, Nagano Company Izumi Seiki Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A wire tensioner for a branch line, in which a structure, such as a utility pole, and an anchor rod whose lower portion is embedded in the ground are connected by interposing a winding grip material, and which is detachably attached to the anchor rod. A hydraulic cylinder to be fixed, a pulley attached to a piston rod of the hydraulic cylinder, one end is connected to the hydraulic cylinder, and the other end is connected to a chuck for chucking the pulling side of the branch line, and the pulley is attached to the pulley. A hydraulic tension device for branch lines, characterized in that it consists of a twisted rope.