JPS6134013B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a telescoping adjustment device for a turnbuckle for tensioning a rope, wire, chain, etc. or a pipe support used at a construction site.

In the case of conventional turnbuckles, by rotating the elongated frame, the right-hand threaded rod and the left-hand threaded rod screwed into the threaded holes at both ends of the frame are simultaneously moved in the approaching direction.
Alternatively, since it is structured to slide in the direction of separation, the number of rotation operations of the frame increases when the frame is extended or contracted significantly.

For this reason, there was a drawback that it could not be expanded or contracted quickly.

The invention aims to eliminate the above-mentioned drawbacks by providing a simple and quick telescopic adjustment.

This invention consists of a large-diameter body made of a pipe, and a small-diameter body made of a pipe or shaft fitted into the large-diameter body so as to be able to slide and rotate in the axial direction. A threaded portion is provided in a predetermined range facing in the direction, and the large diameter body is opposed to the large diameter body by sandwiching the threaded portion, and a fixed half nut body is provided on one opposing side to engage with the threaded portion, and the other side is provided with a fixed half nut body that engages with the threaded portion. A movable half-nut body is provided that can move toward and away from the threaded part and maintain a state of engagement with the threaded part, and furthermore, one or both of the large diameter body and the small diameter body can be rotated manually. To provide a telescopic adjustment device.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In the figure, A is an extensible body that is movable in the axial direction and rotatable.

The above expandable body A is a large diameter body 1 made of a pipe.
and a small-diameter body 2 consisting of a pipe or shaft inserted from the tip side of the large-diameter body 1.

Further, a threaded portion 3 is provided within a predetermined range from the outer periphery insertion side tip of the small diameter body 2 toward the distal end.

Further, on both sides sandwiching the threaded part 3 at the tip of the large diameter body 1, there are fixed half nut bodies 4 that engage with the threaded part 3.
and a movable half-nut body 6 that can move toward and away from the threaded portion 3 by operating the lever 5 and maintain engagement with the threaded portion 3.

In the illustrated case, the fixed half nut body 4 and the movable half nut body 6 have a base body 7 fixed to the tip of the large diameter body 1 by screwing, and a through hole 8 through which the small diameter body 2 passes through the base body 7. A through hole 9 through which one side of the base body 7 communicates with the through hole 8, and a notch 1 facing inward from the front surface of the base body 7 so as to cross the through hole 9.
0, first fit the annular body 11 connected to the lever 5 into the notch 10, and then fit the screw shaft 12 into the through hole 9 while inserting the screw hole provided in the inner peripheral surface of the annular body 11. The screw shaft 12 is screwed into the screw shaft 13, and the outer end of the through hole 9 is closed by a cover plate 14 which is fixed to the base body 7 with screws 22.
A pair of protrusions 15 and 1 protrude from the back surface of the lid plate 14
5, the protrusion 16 having two parallel surfaces at the end of the screw shaft 12 is fitted to stop the rotation of the screw shaft 12, and the screw shaft 12 is moved back while rotating the lever 5 clockwise in FIG. , the movable half-nut body 6 provided on the distal end surface of the screw shaft 12 is adapted to be detached from the screw portion 3.

Further, a through hole 17 is provided through which the notch portion 10 communicates with the rear surface of the base body 7, and a pawl 19 having a lever 18 is fitted into this through hole 17, and is rotatably supported by a pin 20. Teeth 21 provided on the outer periphery of the body 11 and the pawls 19 engage with each other to stop the annular body 11 from rotating.

The fixed half nut body 4 is formed around the half circumference of the through hole 8.

In addition, although the expandable body A is a turnbuckle in which engagement members 25 are provided at the ends of the large diameter body 1 and the small diameter body 2 in the illustrated case, it may be a pipe support or the like.

In the figure, reference numeral 23 denotes a helical spring that provides one-way rotation to the pawl 19 so that the pawl 19 and the tooth portion 21 engage with each other.
4 is a handle provided on the large diameter body 1 for rotational operation.

The telescopic adjustment device according to the present invention has the above-mentioned structure, and its operation will be explained next. First, by pushing the lever and rotating the pawl 19 clockwise in FIG. Release the engagement with.

When the lever 5 is rotated clockwise in FIG. 5, the annular body 11 also rotates and the screw shaft 12 is moved backward (in the upward direction in FIG. 4). comes off.

After the small diameter body 2 is pulled in the direction of the screw shaft 12 so that the threaded portion 3 and the fixed nut body 4 are disengaged, the small diameter body 2 is slid in the direction of expansion or contraction.

After adjusting the slide described above, when the screw shaft 12 is moved forward while rotating the lever 5 counterclockwise in FIG. Then, the screw portion 3 is engaged with the fixed half nut body 4.

Further, the lever 5 releases the engagement of the movable half-nut body 6 and the fixed half-nut body 4 with the threaded portion 3 at the position indicated by the two-dot chain line in FIG. 3, the movable half-nut body 6 and the fixed half-nut body 4 are engaged, and while the movable half-nut body 6 and the fixed half-nut body 4 are clamping the threaded part 3 at the solid line position in FIG. The clearance between the movable half-nut body 6 and the fixed half-nut body 4 is set to zero, and it serves as a nut (lock nut) that prevents the meshing portion from loosening due to vibrations, etc.

After the movable half-nut body 6 and the fixed half-nut body 4 are engaged with the threaded portion 3, the expansion and contraction can be adjusted by rotating the large-diameter body 1 or the small-diameter body 2.

Although a pipe is used as the large-diameter body 1, a channel-shaped member or an elongated frame may also be used.

As described above, according to the telescopic adjustment device according to the present invention, the movable half-nut body and the fixed half-nut body on the large-diameter side are engaged with the outer peripheral screw portion of the small-diameter body constituting the telescopic body. Since the movable half-nut body is disengaged from the threaded portion while stopping the extension and retracting the movable half-nut body by operating the lever, the extendable body can be easily and quickly extended or contracted. can be done.

Further, by rotating the expandable body, the expandable body can be moved and expanded, so that, for example, a wire can be strongly tensed.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention, and FIG. 1 is a front view, FIG. 2 is a plan view of the same, FIG. 3 is an exploded perspective view showing the main parts of the same, and FIG. 4 is an enlarged longitudinal sectional front view of the same. , FIG. 5 is an enlarged partially cutaway plan view of the same, and FIG. 6 is an enlarged vertical side view. A...Extensible body, 1...Large diameter body, 2...Small diameter body,
3...Threaded part, 4...Fixed half nut body, 5...
Lever, 6...Movable half-nut body, 7...Base body,
8...Through hole, 9...Through hole, 10...Notch, 1
DESCRIPTION OF SYMBOLS 1...Annular body, 12...Screw shaft, 13...Screw hole, 14...Lid plate, 15...Protrusion part, 16...Protrusion part, 17...Through hole, 18...Lever, 19...
Claw, 20...pin, 21...tooth.

Claims (1)

[Claims] 1 A telescopic body is composed of a large-diameter body made of a pipe, etc., and a small-diameter body inserted into the large-diameter body so as to be movable and rotatable in the axial direction, and a telescopic body is formed from the outer circumferential insertion side of the small-diameter body toward the distal end. A threaded portion is formed within a predetermined range, and a large diameter body is placed opposite the threaded portion between them, and a fixed half nut body that engages with the threaded portion is placed on one opposing side, and a fixed half-nut body that engages with the threaded portion is attached to the threaded portion on the other side by operating a lever. An expansion/contraction adjustment device provided with a movable half-nut body that can move toward and away from the body and maintain a state of engagement with a threaded portion.