JP2000329198A - Turnbuckle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enlarge a stroke length per a unit rod to a frame-length extent by setting one of rods screwed in the both ends of a frame and relatively and axially moving on the same axis to a cylindrical structure and inserting the other rod into the cylindrical structure part. SOLUTION: One rod 1 is set to a large diameter, while the other rod 2 is set to a small diameter, and the whole length of the screw shaft part of the large-diameter rod 1 is bored into a cylindrical shape so as to be formed into a cylindrical structure part 3. The inside diameter of the cylindrical structure part 3 is set smaller than the outside diameter of the small-diameter rod 2 so that the small-diameter rod 2 can be inserted into the cylindrical structure part 3 and the both rods 1, 2 are overlapped on each other in a flame 4. The stroke length per a rod can be set to approximately one-frame length. This constitution can enlarge the stroke length per one rod to a frame-length extent so as to secure the long stroke.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turnbuckle used as a tool for expanding and contracting or adjusting tension.

[0002]

2. Description of the Related Art Generally, a turnbuckle is formed with screw holes at both longitudinal ends of a frame having a substantially rectangular frame structure.
It is a structure in which rods with screw processing are screwed into each screw hole, both rods are relatively axially moved on the same axis, and the screw holes at both ends of the frame are processed into reverse screws. Simply rotating the frame moves both rods in opposite directions, causing the rods to expand and contract.

[0003] Such a turnbuckle is used for adjusting the tension of an electric wire or the like with a hook at the end of a rod or the like, and is recently used for a shaft of a telescopic support material in an earth retaining method.

[0004]

In the conventional turnbuckle, since the two rods are relatively axially moved on the same axis as described above, when the rods are reduced to the limit, the two rods are almost at the center of the frame. At the end of the rod, the stroke length per rod is about 1 frame length.
/ 2, which was not efficient. For this reason, in order to secure a long stroke, the frame length must be increased, and a narrow place where compactness is required; for example, there is a problem in the use of the above-mentioned earth retaining method as a telescopic support material. .

Accordingly, an object of the present invention is to provide a turnbuckle capable of increasing the stroke length per rod to about the frame length.

[0006]

According to the turnbuckle provided by the present invention, one of the rods which are screwed into both ends of the frame and are relatively axially moved on the same axis has a cylindrical structure. The other rod can be inserted, so that the stroke length of one rod is almost the same as the frame length, and a stroke length approximately twice as long as that of a conventional general turnbuckle is obtained.

[0007] Such a turnbuckle is effective in a narrow place, and is most suitable, for example, for a shaft portion of a telescopic support material in an earth retaining method.

[0008]

FIG. 1 shows an embodiment of a turnbuckle according to the present invention, in which screw holes (not shown) are formed at both longitudinal ends of a frame 4 having a substantially rectangular frame structure. In a structure in which threaded rods are screwed into respective screw holes, one rod 1 has a large diameter and the other rod 2 has a small diameter. A cylindrical structure 3 is formed by drilling a hole. The inner diameter of the cylindrical structure 3 is made smaller than the outer diameter of the small-diameter rod 2, so that the small-diameter rod 2
Can be inserted without resistance, and both rods 1 and 2 can be overlapped within the frame 4 as shown. Reference numeral 5 denotes a clevis attached to the end of the large diameter rod, and reference numeral 6 denotes an eye attached to the end of the small diameter rod.

According to the turnbuckle of this embodiment having such a structure, the stroke length per rod can be made about one frame length, and it is about twice as long as the conventional turnbuckle. , And the conventional stroke length is about half a frame length.

FIG. 2 shows an example of an earth retaining method using a stretchable support material using a turnbuckle according to this embodiment. This construction method is a construction method in which the formwork 8 is formed of the support material capable of extending and contracting the arm 7 and the earth retaining wall of the mortar wall 9 is constructed. The turnbuckle 10 is a shaft 1 of a telescopic support material.
It is located at one portion and serves to horizontally move the holding pad 12 by moving the arm 7 up and down.

In the conventional turnbuckle, a large stroke cannot be given to the above-described upper limit movement of the arm due to the limitation of the frame length, and it takes a great deal of trouble to remove the formwork from the mortar wall. According to the turnbuckle of this embodiment, it is possible to obtain a larger stroke of up-and-down motion even though the frame has the same size as the conventional turnbuckle, and it has been improved so that the formwork can be easily removed.

Incidentally, regarding the performance such as the tensile load,
It depends on the small-diameter rod 2 and can be studied in the same manner as the conventional product. In the above-described example, the turn buckle according to the present embodiment is applicable to tension adjustment of an electric wire, a temporary branch line, and the like. in this case,
The attached structure at the rod end may be a hook or the like.

[0013]

According to the present invention as described above, 1
The intended object of providing a turnbuckle capable of increasing the stroke length per rod to about the frame length can be achieved.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a cross section of an embodiment of a turnbuckle according to the present invention.

FIG. 2 is an explanatory view showing an example of an earth retaining method using a stretchable support material, which employs the turnbuckle of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Large diameter rod 2 Small diameter rod 3 Cylindrical structure part 4 Frame 5 Clevis 6 Eye 7 Arm 8 Formwork 9 Mortar wall 10 Turnbuckle 11 Shaft 12 Press pad

Claims (2)

[Claims] A turnbuckle wherein one of rods screwed into both ends of a frame and axially moved relatively on the same axis has a cylindrical structure, and the other rod can be inserted into the cylindrical structure. 2. The turnbuckle according to claim 1, wherein the turnbuckle is used for a shaft portion of a telescopic support material in an earth retaining method.