JP3236437B2 - Parent rope strainer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a main rope tensioner used for extending a main rope at a work position at a high place.

[0002]

2. Description of the Related Art In general, when working at a high place, an operator wraps a safety belt for working at a high place around his / her waist, and hooks the hook at the tip of a rope with a hook connected to the safety belt to an appropriate structure. It also tries to prevent crashes.

[0003] At the work site, there is a case where there is no hook engaging portion for engaging the hook in the work area of the worker. In this case, the main rope is usually stretched horizontally,
A hook of a rope with a hook is engaged with the master rope to ensure safety.

[0004] A parent rope tensioner is used to stretch the parent rope. FIG. 4 shows a conventionally known mainline tensioner.
In this master rope tensioner, a pair of interval holding shafts 21a and 21b are provided between both end portions of a pair of side plates 20, and the interval holding shafts 21a and 21b are provided.
A guide roller 22 is rotatably provided between a and 21b.

A lock arm 23 is rotatably supported on one of the distance maintaining shafts 21a so as to be rotatable.
A claw 24 is attached to the other end.

In the master rope tensioner, one end of the master rope A is inserted between the other spacing holding shaft 21b and the guide roller 22, and the master rope A is moved along the outer periphery of the guide roller 22 so that the guide roller 22 is moved. And a hook 25 provided at the other end of the parent rope A and a hook 27 at the tip of a rope 26 connected to the other end of the lock arm 23 are engaged with appropriate members. By pulling one end of the rope A, the parent rope A
And the rope 26 are tensioned, and the guide roller 2
The claw 24 is engaged with a part of the master rope A along the outer periphery of the base 2 to hold the master rope A in a tensioned state.

[0007]

By the way, in the above-mentioned conventional rope tensioner, the other end of the lock arm 23 is pressed against the guide roller 22 to release the engagement of the claw 24 and the rope A is loosened. However, when the worker moves, the portable goods and the conveyed material often collide with the other end of the side plate 20, and the collision swings the lock arm 23 in the disengagement direction, The engagement of the master rope A is released and the master rope A is loosened, and there is a problem in safety.

[0008] An object of the present invention is to improve the safety of the parent strainer.

[0009]

In order to solve the above-mentioned problems, according to the present invention, there is provided a guide frame in which a pair of side plates are coupled to both sides of a U-shaped rope guide, and one end of the rope guide. A rotatable guide roller provided at the bottom,
A rope engagement frame incorporated between the other end portions of the pair of side plates, wherein the rope engagement frame is a pair of plate members rotatably supported around the other end portions of the pair of side plates. And a rope engaging member that is engageable with a parent rope inserted into the guide frame is provided at an end of the pair of plate bodies facing the rope guide portion, and the rope engagement The member deflects the rope engagement frame with a spring in a direction in which the member swings toward the rope guide portion, and between the pair of plate bodies of the rope engagement frame,
When the folded side end of the master rope inserted through the guide frame and folded back from the guide roller is tensioned obliquely downward, the rope engaging frame is pushed by the folded side end and the rope engaging frame is moved. When the first shaft that swings in the disengagement direction away from the master rope and the folded-back end is substantially parallel to the master rope and is tightened, the rope guide is pushed by the folded-side end. A second shaft for swinging the frame in the engagement direction is provided.

[0010]

When inserting the main rope, one end of the main rope is inserted into the inside of the rope guide, and the one end is folded back along the outer periphery of the guide roller, and the folded end is connected to a pair of rope engaging frames. And between the first shaft and the second shaft and pulled out of the guide frame. When the main rope is tensioned, an engaging tool having a hook is attached to the other end of the main rope, the hook is engaged with an appropriate member, and the folded side end of the main rope is pulled substantially horizontally. The master rope is tensioned, and the rope engagement member of the rope engaging frame presses a part of the master rope against the inner surface of the rope guide, thereby maintaining the parent rope in a tensioned state.

When the master rope is loosened, the folded side end of the master rope is pulled obliquely downward, the first shaft is pressed at the folded side end, and the rope engaging frame is swung in the disengaging direction. To release the pressing of the parent rope and release the rope engagement frame.
Hold on to loosen the rope.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

As shown in FIGS. 1 to 3, the guide frame 1 is U-shaped.
The rope guide 2 is provided with a pair of side plates 3 on both sides of the rope guide 2.

A shaft 4 is mounted between one ends of the side plates 3,3. The shaft 4 is provided between the pair of side plates 3.
The roller shaft 5 is slightly offset from the other end of the guide frame 1 to the other end of the guide frame 1.
And a grooved guide roller 6 on its roller shaft 5.
Are rotatably supported. Furthermore, a pair of side plates 3,
A rope engagement frame 7 is incorporated between the other ends of the three.

The rope engaging frame 7 has a pair of plates 8 on both sides, and the pair of plates 8 is rotatably supported on the other end of the pair of side plates 3 via a shaft 9. Have been.

A pair of plate members 8 is provided with a rope engaging member 10 at an end facing the inner surface of the rope guide 2 so as to be engageable with the master rope A.

Although the rope engaging member 10 is shown here to be composed of a plurality of claw plates having serrated engaging teeth formed on the outer circumferential arc edge, the present invention is not limited to this. For example, a shaft whose outer periphery is knurled may be used as the rope engaging member.

A guide roller 6 is provided between the pair of plate members 8.
A first shaft 11 is provided at a position below the turning-side end a of the master rope A that is turned back from the second line, and a second shaft 12 is provided at an upper position.
The roller 13 provided outside the first shaft 11 is pushed by the folded side end a when the folded side end a is skewed obliquely downward, and the rope engaging frame 7 is fixed to the rope engaging member 1.
0 swings in the disengagement direction away from the master rope A inserted through the rope guide portion 2.

Further, when the second shaft 12 is tensioned with the folded-back end a substantially parallel to the master rope A, the second shaft 12 is pushed by the folded-side end a so that the rope engaging frame 7 is engaged with the rope engaging member. The joint member 10 is caused to swing in a direction in which it is engaged with the master rope A.

A spring 14 is connected to the second shaft 12, and the spring 14 deflects the rope engaging frame 7 in a direction in which the rope engaging member 10 engages with the parent rope A.

The main rope tensioner shown in the embodiment has the above-described structure. When mounting the main rope A, one end of the main rope A is inserted along the inner surface of the rope guide portion 2 and the one end is guided. The roller 6 is folded back along the outer circumference, and the folded side end a is inserted between the pair of plate bodies 8 of the rope engaging frame 7 and pulled out of the guide frame 1.

When the parent rope A is inserted as described above,
The rope engaging member 10 of the rope engaging frame 7 is
A part of the master rope A is pressed against the inner surface of the rope guide 2 by the elasticity of the rope.

After the main rope A is inserted as described above, as shown in FIG. 3, a hook 15 previously mounted on the other end of the main rope A and a pivot 4 are attached to the shaft 4 via a swivel 16. The hook 17 is engaged with an appropriate member X,
When the folded side end a is pulled substantially parallel to the master rope A, the master rope A is tensioned. At this time, the second shaft 12 is pushed at the folded side end a, and the rope engaging frame 7 swings in a direction in which the rope engaging member 10 presses the master rope A against the inner surface of the rope guide portion 2. Sliding occurs at the contact portion between the joining member 10 and the master rope A, and the master rope A is in a tensioned state.

When the operation of pulling the folded side end a of the master rope A is released, the rope engaging member 10 in contact with the master rope A is released.
Is always in engagement with the master rope A, so that the master rope A does not loosen.

In the tension state of the master rope A, if a large pulling force acts on the master rope A due to a fall of the worker, the rope engaging member 10 is pulled in the slack direction of the master rope A, and thus the rope engagement frame is provided. 7 the rope engaging member 10 rotates in the direction of engagement is to strongly engage the Shintsuna a, it is prevented from loosening the lifeline a caused by the engagement.

When the master rope A is loosened, the folded end portion a of the master rope A is pulled obliquely downward, and the roller 13 of the first shaft 11 is pushed by the folded end portion a so that the rope engagement frame 7 can be loosened.
Is pivoted in the disengagement direction, and the main line A is pulled while the rope engaging member 10 is kept in a state of being separated from the main line A.

[0027]

As described above, in the parent rope tensioner according to the present invention, the folded end of the parent rope is pulled obliquely downward, and unless the first shaft is pushed down at the folded side, the parent rope tensioner is pulled down. Since the rope cannot be loosened, the parent rope can always be kept in tension, and safety can be improved.

Also, a state in which the folded side end of the master rope is pulled substantially horizontally , the second shaft is pushed at the folded side end, and the master rope is pressed against the inner surface of the rope guide with the rope engaging member. Therefore, the rope engaging member is always in engagement with the master rope, and it is possible to prevent the rope from becoming loose after releasing the operation of pulling the folded end.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view showing one embodiment of a parent rope tensioner according to the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a front view showing a stretched state of the parent rope.

FIG. 4 is a longitudinal sectional front view showing a conventional parent rope tensioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Guide frame 2 Rope guide part 3 Side plate 4 axis 6 Guide roller 7 Rope engagement frame 8 Plate body 10 Rope engagement member 11 1st axis 12 2nd axis 13 Spring

Claims (1)

(57) [Claims] 1. A guide frame in which a pair of side plates are connected to both sides of a U-shaped rope guide portion, a rotatable guide roller provided at a lower end of one end of the rope guide portion, and a pair of side plates. A rope engagement frame incorporated between the end portions, the rope engagement frame has a pair of plate bodies rotatably supported on both sides around the other end of the pair of side plates, An end of the pair of plates facing the rope guide is provided with a rope engaging member engageable with a master rope inserted into the guide frame, and the rope engaging member is attached to the rope guide. The rope engaging frame is deflected by a spring in the direction of swinging toward, and between the pair of plate bodies of the rope engaging frame, the folded side end of the master rope inserted through the guide frame and folded back from the guide roller. When the part is tightened obliquely downward, press it at the folded end. When the rope engagement frame is swung in a disengagement direction in which the rope engagement member separates from the master rope, and the folded end is substantially parallel to the master rope and tensioned, A tensioner provided with a second shaft that is pushed at the folded side end and swings the rope guide frame in the engagement direction.