JPS582161A - Traction device such as wire rope - Google Patents

Abstract

PURPOSE:To provide a means capable of securely and easily pulling heavy load by making it possible to use a wire rope having a relatively small diameter. CONSTITUTION:Two wire ropes 7, 7', plural pairs of grips 10a, 10b, 10a', 10b' for gripping said wire ropes 7, 7', right and left side guides 8, 8' and a central guide 8'' are provided on a traction device, while a connecting plate 11 equipped with a grip hydraulic cylinder 12 is installed. The wire ropes 7, 7' are gripped with a front puller 2 to release a rear puller 3 permitting them to be advanced by a stroke and next the front puller 2 is released, and the wire ropes 7, 7' are gripped with a rear puller 3 to permit them to be pulled. Then, the wire ropes 7, 7' are pulled at a prescribed speed to permit it to be rolled round a take-up reel 5 by continuously repeating said operateions, so that the diameters of the wire ropes 7, 7' can be reduced, ensuring easy handling.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pulling device for a wire rope or the like, and particularly to a device for pulling a wire rope or the like using a gripper.

This type of wire rope pulling device, as shown in the longitudinal sectional view of FIG. The front puller P and the rear puller repeatedly move the tooth base stroke in the axial direction of the wire rope WR as shown by the arrow by the main hydraulic cylinders M O and C, then release the wire rope WR and return to the original position. 7
7P' are arranged vertically in the front and rear, and by alternately operating the front puller P and the rear puller P', the wire rope is sequentially pulled in strokes and is wound up into the RE.

However, in known devices of this type, the wire rope W
Since the structure is such that only one Ri is towed, when towing a heavy object, the diameter of the wire rope becomes large, making it difficult for the worker to handle it, and if the wire rope breaks, the towing There are drawbacks such as the inability to continue work.

The present invention was proposed in view of the above circumstances, and it uses a relatively small diameter wire rope that is easy to handle to tow a relatively heavy object, and it also prevents damage or breakage of one of the wire ropes. Another object of the present invention is to provide a traction device for wire ropes, cables, etc., which can continue traction work with other wire ropes.

To this end, the present invention repeats an operation in which a wire rope is releasably gripped by a wedge-shaped grip, the wire rope is moved vertically along a guide for a certain stroke, and then the wire rope is released and returned to the original position. The front and rear pullers are arranged vertically at appropriate intervals in the front-rear direction, and the wire rope is pulled by alternately driving the front and rear pullers, which grips a plurality of wire ropes. The grip includes a plurality of pairs of grips that hold the grip, a plurality of guides that guide the plurality of pairs of grips, a connecting plate that connects the plurality of pairs of grips, and a grip hydraulic cylinder that drives the connecting plate. It is characterized by

An embodiment in which the present invention is applied to a pulling device for two wire ropes will be described with reference to the drawings. FIG. 2 is a longitudinal sectional view thereof.

In the above figure, 1 is a main body consisting of a front puller 2 and a rear puller 3 having the same structure as the front puller 2, which are slidably arranged in the front and rear, 4 is a heavy object to be towed, and 5 is a heavy object. Take-up reels 8 and 8' are each fixed to the front puller 2 and have wedges inside. loa, (left and right side guides with inclined sliding surfaces abutting the wedge lob', 8'' is attached to the center of the side guides 8 and 8' with wedges tob and 10 cL' inclined surfaces on the left and right sides, respectively) 9 and 9' are the left and right main hydraulic cylinders fixed respectively on the left and right sides of the main body l and move the front puller 2 longitudinally; 11 is the left pair of hydraulic cylinders; wedge 10a, lob and a pair of wedges on the right l Oa'.

A connecting plate 12 protruding from each fob' and connecting the other end of the iron is inserted between the main body l and the front puller 2,
The rear puller 3 is a grip hydraulic cylinder that moves the connecting plate 11 in the vertical direction, and has the same structure as the front puller 2 described above.

In such a device, a pair of wedges lOa and iob that sandwich the wire rope 7 and a pair of wedges 10a' and lob' that sandwich the wire rope 7' are simultaneously operated by a grip hydraulic cylinder 12 via a connecting plate 11. Since it moves in the front and back direction, the side guides 8, 8' and the center guide 8
The wire rope moves along the inclined sliding surface of 7.7'
can be grasped and released at the same time.

Furthermore, the front puller 2, which simultaneously grips and releases the wire rope 7.7', is repeatedly moved back and forth through a constant stroke by the main hydraulic cylinder 9.9'. The same applies to the rear puller 3.

Therefore, when the front puller 2 first grips the wire rope 7.7' and pulls it by the stroke, the rear puller 3 moves forward by the stroke with the wire rope 7.7' released, and the primary Front shield 2 is wire rope 7
．． When 7' is released, the rear puller 3 grasps the wire rope 7.7' and then continuously repeats the action of pulling and pulling it by the stroke.
．． 7' is simultaneously pulled at a constant speed, and this is pulled onto the take-up reel 5.
It can be rolled up.

In the above embodiment, two wire ropes are pulled simultaneously by providing one central guide 8'', but three or more wire ropes can be pulled simultaneously by increasing the number of central guides 8''. becomes.

According to such a device, the following effects can be achieved.

(1) Since the structure allows the use of multiple wire ropes, the diameter of each wire rope is smaller than that of conventional wire ropes, making it easier to handle. Furthermore, even if one wire rope is damaged or cut, the amount of load will be reduced, but the towing operation can be continued with the remaining wire rope.

(2) Conventionally, in order to grip the wire rope with the wedge, two grip hydraulic cylinders were used only in the front puller, but in the present invention, a connecting plate is provided to interlock all the wedges. It is sufficient to install one grip hydraulic cylinder for a large number of wedges.

(3) Conventionally, when a pair of wedges were pushed out by a grip hydraulic cylinder to grip a wire rope, each wedge did not move at the same time, or there was a discrepancy in the distance traveled, and once such a phenomenon occurred, However, in the present invention, all the wedges are connected by a connecting plate, and this is pushed out by one grip hydraulic cylinder, making it possible to hold multiple wire ropes. They can be gripped at the same time, eliminating any misalignment between the wedges.

In short, according to the present invention, the wire rope is releasably gripped by a wedge-shaped grip, the wire rope is moved in the longitudinal direction along the guide along the root stroke, and then the wire rope is released to return to the original position. A device in which repeating front and rear pullers are arranged vertically at appropriate intervals in the front-rear direction, and the wire rope is pulled by alternately driving the front and rear pullers, in which a plurality of wire ropes are pulled. A plurality of pairs of grips for grasping, a multiplicity guide for guiding the plurality of pairs of grips, a connecting plate for connecting the plurality of pairs of grips, and a grip hydraulic pressure for driving the connecting plates. The present invention is industrially extremely useful because it provides a towing device for wire ropes and the like that can safely and easily tow heavy objects by including the cylinder.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing a known wire lobe traction device;
FIG. 2 is a longitudinal sectional view showing an embodiment of the present invention. l...Body, 2...Front puller, 3...Rear puller, 4
・・Heavy goods, 5.・Take-up reel, 6.・Partition plate, 7.7
'...Wire rope, 8,8'...Side guide, 8''...
・Central guide, 9,9′・・Main hydraulic cylinder, lOa,
lob... wedge pair, lOa', tab'-< wedge pair,
11 = Connecting plate, 12... Grip hydraulic cylinder, Sub-agent Masafumi Tsukamoto (patent attorney) (and 1 other person)

Claims (1)

[Claims] The wire rope can be released by a wedge-shaped grip,
The front and rear pullers are grasped and moved vertically along the guide for a certain stroke, then the wire rope is released and the action is repeated to return to the original position. and the wire rope is pulled by alternately driving the front and rear pullers, wherein a plurality of pairs of grips grip and hold a plurality of wire ropes, and a plurality of pairs of grips are guided. 1 for connecting a plurality of guides and the plurality of pairs of grips;
1. A traction device for a wire rope or the like, comprising: a connecting plate; and a gripping hydraulic cylinder for driving the connecting plate.