JP2002147540A - Rope tensioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rapidly tense a rope and cope with a rope having a large outer diameter. SOLUTION: The tensioner body 1 is provided with a pair of side plates 3 and 4 facing to each other while leaving some space in a lateral direction, a connecting mechanism 5 of a hook mechanism 2 at an end of the side plates 3 and 4, and a winding mechanism 6 of the rope R and a ratchet mechanism 7 thereof at the other end of the side plates 3 and 4. The winding mechanism 6 is equipped with a revolving member 21, and the revolving member 21 is equipped with a rectangular winding part 31 positioned between the side plates 3 and 4. The winding part 31 has a pair of large surfaces 31a and a pair of small surfaces 31b facing to each other in a perpendicular direction to an axis. The width of the large surface 31a in the perpendicular direction to the axis is larger than an outer diameter of a conventional cylindrical winding part. The winding part 31 is provided with a rectangular insertion hole 32 for passing through the rope R. The width of the insertion hole 32 in a lateral direction is enough large to pass through a twisting rope. The width of the insertion hole 32 in the longitudinal direction is larger than the width in the lateral direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rope tensioning machine for tensioning a rope such as a lifeline when building or repairing a building.

[0002]

2. Description of the Related Art Conventionally, a worker who works at a high place when building or repairing a building secures his / her safety by movably attaching a rope called a lifeline to a rope called a main line. . In many cases, the rope as the main rope is a coated wire rope formed by protecting a metal wire with a coating made of synthetic resin, or a twisted rope formed by twisting fibers such as hemp. I am working on tension between pillars of a building. In the past, a turnbuckle was used to tension the rope, but in recent years, a tensioner having a ratchet mechanism has been used.

[0003] A tensioning machine provided with this ratchet mechanism is composed of a pair of left and right opposite side plates, a connecting member for connecting one end of each of the two side plates, and a connecting member between the other ends of the two side plates. It has a rotatable member rotatably provided, a ratchet mechanism for preventing reverse rotation of the rotatable member, and the like. The rotating member has a cylindrical winding portion for winding the rope, and the winding portion has a circular insertion hole through which the rope is inserted.

[0004]

However, since the worker works at a high place while holding the tensioning machine in his hand, it is important that the tensioning machine be light in weight. The outer diameter of the winding section is small. For this reason, the conventional tensioning machine is adapted to cope with a covered wire rope having a relatively small outer diameter, but is unable to cope with a twisted rope having a relatively large outer diameter. In addition, since the outer diameter of the rotating member is small, the length of the covered wire rope that can be wound by one rotation of the rotating member is short, and the rotating member is required to sufficiently tension the covered wire rope. It is necessary to rotate several times, and the workability of tensioning the coated wire rope is deteriorated.

An object of the present invention is to solve the above-mentioned problems,
An object of the present invention is to provide a rope tensioning machine which can quickly tension a rope stepwise and can cope with a rope having a relatively large outer diameter.

[0006]

In order to achieve the above object, a rope tensioning machine according to the present invention comprises a pair of left and right opposite side plates and one end of each of the both side plates connected at an interval. A connecting member, a rotating member rotatably provided between the other end sides of the side plates, and a ratchet mechanism provided on one of the side plates to prevent reverse rotation of the rotating member, The rotating member has a winding portion that has an insertion hole through which the rope is inserted and winds the rope. The outer shape of the winding portion is substantially rectangular, and one of the winding portions in a direction perpendicular to the axis. The width of the surface is made larger than the width of the other surface.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail based on the illustrated embodiment. FIG. 1 is a perspective view of a main part of an embodiment, and a rope tensioner according to this embodiment includes a rope R.
And a hook mechanism 2 for fastening one end of the tensioner body 1 to a pillar or the like of a building (not shown). The tensioning machine main body 1 includes a pair of side plates 3 and 4 opposed to each other with a space in the left-right direction. A winding mechanism 6 for winding one end of the rope R is provided at the other end of each of the ropes 3 and 4.
The winding mechanism 6 includes a ratchet mechanism 7 for preventing reverse rotation.

The hook mechanism 2 includes an annular portion 2a rotatably connected to the connecting mechanism 5, a hook portion 2b extending integrally from the annular portion 2a and engaged with a pillar, and a hook portion 2b.
An arm 2c and the like, which are rotatably supported at the base of the arm and prevent the hook 2b from coming off the pillar, are provided at an initial position so as to form a loop in cooperation with the hook 2b. Being energized.

FIG. 2 is a plan view of the tensioning machine main body 1. The connecting mechanism 5 includes bolts 11 inserted through holes (not shown) formed at one end sides of the side plates 3 and 4, for example, from one side plate 3 side. The inner collar 12 fitted to the outer peripheral surface of the bolt 11 between the side plates 3 and 4, the two outer collars 13 and 14 fitted to the outer peripheral surface of the inner collar 12, and the outside of the other side plate 4 And a nut 15 screwed to the bolt 11. The inner collar 12 has a length that determines the distance between the side plates 3 and 4, and the outer collars 13 and 14 have a length that allows the annular portion 2a of the hook mechanism 2 to be disposed therebetween.

The take-up mechanism 6 includes a metal rotating member 21 rotatably supported between the side plates 3 and 4, rings 22 and 23 disposed inside the side plates 3 and 4, respectively, and one side plate. A nut 24 screwed to the rotating member 21 outside the nut 3;
A ratchet wheel 25 fixed to the rotating member 21 outside the other side plate 4 to be a part of the ratchet mechanism 7, a nut 26 screwed to the rotating member 21 outside the ratchet wheel 25, and a ratchet wheel 25 And a detent 27 which is attached to the other side plate 4 so as to be able to mesh with each other and becomes a part of the ratchet mechanism 7. The nut 26 is fixed to the rotating member 21 by a split pin 28.

A biasing mechanism (not shown) such as a coil spring for biasing the detent 27 in the direction of engagement with the ratchet wheel 25 is provided inside the detent 27 of the ratchet mechanism 7. Are always meshed with the ratchet wheel 25. In the vicinity of the ratchet wheel 25 and the detent 27,
A release mechanism (not shown) for releasing the engagement between the ratchet 25 and the detent 27 is provided.

As shown in the perspective view of FIG. 3, the rotary member 21 is positioned between the side plates 3 and 4 and has a rectangular shape for winding the rope R, for example, a thick plate-like shape. A take-out part 31 is provided. The winding portion 31 has a pair of large surfaces 31a and a pair of small surfaces 31b opposed in the direction perpendicular to the axis, and has a pair of end surfaces 31c opposed in the axial direction. The width of the large surface 31a in the direction perpendicular to the axis is larger than the outer diameter of the conventional cylindrical winding portion.

An insertion hole 3 through which the rope R is inserted is provided between the large surfaces 31a of the winding portion 31 of the rotating member 21.
2 are penetrated. The cross-sectional shape of the insertion hole 32 is rectangular, for example, rectangular, and both openings are chamfered 33 respectively. The width of the insertion hole 32 in the short direction is set to be large enough to allow the later-described twisted rope having a relatively large outer diameter to be inserted, and the width of the insertion hole 32 in the long direction is larger than that in the short direction.

One end face 3 of the winding portion 31 of the rotating member 21
A screw portion 34 to which the nut 24 is screwed is integrally provided on the axis of 1c, and the ratchet wheel 2 is provided on the axis of the other end surface 31c.
A shaft portion 35 into which the nut 5 is fitted and a screw portion 36 into which the nut 26 is screwed are sequentially and integrally provided. A pair of flat portions 37 are formed on the shaft portion 35 so as to face each other, and the rotation of the ratchet wheel 25 is regulated by these flat portions 37.

When assembling the tensioning machine, first, the winding mechanism 6 is assembled, and then the connecting mechanism 5 is assembled.
When assembling the winding mechanism 6, the screw 3
The rings 22 and 23 are fitted to the outer peripheral surfaces of the shaft 4 and the shaft 35, respectively, and the threaded portions 34 and the shaft 35 are inserted into holes (not shown) in the front portions of the side plates 3 and 4, respectively.
The side plates 3 and 4 are arranged outside of 23.

Next, a nut 24 is screwed onto a screw portion 34 projecting outward from one side plate 3, and a ratchet wheel 25 is fitted to a shaft portion 35 projecting from the other side plate 4. The screw 36
, A nut 26 is screwed on, and a split pin 28 is attached. Then, the claw portion 27a of the detent 27 is engaged with the claw portion 25 of the ratchet wheel 25.
The detent 27 is rotatably attached to the other side plate 4 so as to engage with the other side plate 4. At this time, a biasing mechanism and a release mechanism for the detent 27 are also assembled.

At the time of assembling the connecting mechanism 5, one outer collar 13, the annular portion 2a of the hook mechanism 2, and the other outer collar 13 are sequentially fitted to the outer peripheral surface of the inner collar 12 in advance, and these are fitted to the side plate 3, 4 between. Then, the bolt 11 is inserted through the hole of the one side plate 3, the hole of the inner collar 12, and the hole of the other side plate 4, and the nut 15 is screwed into the screw portion 11 a of the bolt 11 protruding from the other side plate 4.

When tensioning the covered wire rope R having a relatively small outer diameter with this tensioning machine, one end of the covered wire rope R is connected to a piece provided on one pillar of a building through a socket, a shackle or the like. The hook portion 2b of the hook mechanism 2 is engaged with the piece provided on the other pillar. next,
The engagement between the ratchet wheel 25 and the detent 27 of the tensioning machine main body 1 is confirmed, and the other end of the covering wire rope R is inserted through the insertion hole 32 of the rotating member 21 of the tensioning machine main body 1 with a margin, and the covering wire is wound. Tension rope R by hand. Then, a wrench (not shown) is engaged with the nut 26 outside the ratchet wheel 25, and the wrench is rotated in a predetermined direction. Thereby, the rotating member 21 rotates, and the winding unit 31 rotates, and as shown in FIG. 4, the rope R is gradually wound and tensioned.

On the other hand, when a twisted rope having a relatively large outer diameter is to be tensioned, the other end of the twisted rope R 'having one end connected to a pillar is inserted into the insertion hole 3 of the rotating member 21 as shown in FIG.
2 and then rotate the rotating member 21 as described above.

As described above, in the embodiment, the rotating member 21
The winding shape of the winding portion 31 is rectangular, and the width of the large surface 31a in the direction perpendicular to the axis of the winding portion 31 is larger than the width of the small surface 31b, so that the weight of the rotating member 21 is not increased. It is possible to make the width of the large surface 31a in the direction perpendicular to the axis larger than the outer shape of the conventional cylindrical winding portion,
The rope R, R 'can be wound stepwise by a single rotation of the rotating member 21 instead of being wound with a uniform tightening force as in a conventional tightening machine, thereby shortening the tightening work time and tightening. Power can be improved.

Further, the cross-sectional shape of the insertion hole 32 of the rotating member 21 is rectangular, and the width in the short direction is set to a size that allows the relatively large outer diameter of the twisted rope R 'to be inserted.
It can correspond to both the coated wire rope R and the twisted rope R ′. Furthermore, since the width of the insertion hole 32 of the rotating member 21 in the longitudinal direction is made larger than that in the short direction, a flexible rope having an outer diameter larger than the outer diameter of the twisted rope R 'is deformed flat and the insertion hole 32 is formed. Can be inserted into

In the above embodiment, the rotating member 21
Although the outer shape of the winding portion 31 is rectangular, it can be formed in various shapes without departing from the scope of the claims. For example, the smaller surface 31b of the winding portion 31 is centered on the axis. It can be part of a curved surface. In addition, although the cross-sectional shape of the insertion hole 32 of the rotating member 21 is rectangular, it does not matter if the shape is elliptical or circular. Further, the ring 2 is disposed between the end face 31 c of the winding portion 31 of the rotating member 21 and the side plates 3 and 4.
Although 2, 23 were interposed, they need not necessarily be provided.

[0023]

As described above, in the rope tensioning machine according to the present invention, the outer shape of the winding portion is substantially rectangular, and the width of one surface in the direction perpendicular to the axis of the winding portion is adjusted to the other surface. Since it is larger than the width, it is possible to make the width in the direction perpendicular to the axis of the winding portion larger than the outer diameter of the conventional cylindrical winding portion without increasing the weight. With this, the rope can be wound up stepwise and the rope can be quickly tensioned.

Further, if the cross-sectional shape of the insertion hole of the rotating member is substantially rectangular or substantially elliptical so that the twisted rope can be inserted,
In addition to being able to cope with both the covered wire rope and the twisted rope, it becomes possible to deform a flexible rope having an outer diameter larger than the outer diameter of the twisted rope in a flat shape and to insert it into the insertion hole.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of an embodiment.

FIG. 2 is a plan view of a tensioner main body.

FIG. 3 is a perspective view of a rotating member.

FIG. 4 is a plan view showing a state in which a covered wire rope is tensioned.

FIG. 5 is a plan view showing a state in which the twisted rope is tensioned.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tensile machine main body 2 Hook mechanism 3, 4 Side plate 5 Connecting mechanism 6 Winding mechanism 7 Ratchet mechanism 21 Rotating member 25 Claw wheel 27 Detent 31 Winding part 32 Insertion holes R, R 'Rope

Claims (2)

[Claims] 1. A pair of side plates opposing each other on the left and right sides, a connecting portion connecting one end side of each of the both side plates at an interval, and rotatable between the other end sides of the both side plates. The rotating member provided in the, provided with a ratchet mechanism provided on one of the side plates to prevent reverse rotation of the rotating member,
The rotating member has a winding portion that has an insertion hole through which the rope is inserted and winds the rope. The outer shape of the winding portion is substantially rectangular, and one of the winding portions in a direction perpendicular to the axis. A rope tensioning machine characterized in that the width of one surface is larger than the width of the other surface. 2. The rope tensioning machine according to claim 1, wherein a cross-sectional shape of the insertion hole is a rectangular shape or an elliptical shape through which a twisted rope can be inserted.