JP3081907B2 - Jig for connecting rod-shaped members - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting jig for connecting a rod-shaped member such as a PC steel rod, which is a diagonal member of a cable-stayed bridge.

[0002]

2. Description of the Related Art For example, in a cable stayed bridge, a plurality of diagonal members 3 are stretched between a main girder part 1 and a main tower part 2 of the bridge as shown in FIG. It supports, and the diagonal 3
A steel bar or the like is used.

[0003] The diagonal member 3 made of a PC steel bar or the like is previously installed in the main girder portion 1 and the main tower portion 2 on the skeleton side in advance, and a long diagonal member is interposed between the short diagonal members 3a. 3b is connected using the coupler 4.

When connecting the short diagonal member 3a and the long diagonal member 3b, it is necessary to make the axes of the diagonal members 3a and 3b coincide with each other. Then, the connecting ends are finely adjusted so that the connecting ends are supported and moved by a jig such as a lever block and the like, so as to be aligned with the axes of the oblique members 3a and 3b.

Further, the distance between the diagonal members 3a and 3b is also adjusted so that the threading pitch of the coupler 4 and the dicing members 3a and 3b match.

[0006]

The main girder part 1 on the skeleton side
In many cases, the axes of the diagonal members 3a and 3b do not coincide with each other due to a construction error of the short diagonal member 3a installed in advance in the main tower portion 2 or a deflection of the diagonal member 3 by its own weight due to a PC steel rod or the like. When the axes are aligned, the oblique member 3a such as a PC steel bar installed on the skeleton has a short steel bar length and a high bending rigidity.
Fine adjustment for positioning of the steel bar end is difficult.

In such a conventional method of performing fine adjustment for positioning of the end of the steel rod using a lever block or a slash, a large force is required, and a manual operation is required by the lever block or the slash during connection. The possibility of crushing is very high and there is a problem with safety.In addition, the work of matching the shaft center and matching the threading pitch is a trial and error work, and requires a lever block and a broken wood It took time and effort to make the connection, and the workability was not good.

An object of the present invention is to eliminate the disadvantages of the prior art, and to connect a diagonal member such as a PC steel bar installed on the skeleton with a diagonal member stretched between the skeletons. A shaft jig can be easily matched, the thread cutting pitch of both diagonal members can be easily matched, and there is no need for lever blocks or stakes to be assembled. To provide.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a connecting jig for positioning two rod-shaped members when the ends of the two rod-shaped members are connected to each other. The ends of the second positioning adjusting tube are slidably combined on the same axis of the adjusting tube for positioning, and clamps for gripping the rod-shaped members are provided on the same line on the sides of the first and second adjusting tubes. And a nut for projecting a long bolt for fine adjustment toward the second adjustment tube side inside the first positioning adjustment tube, and screwing the bolt to the tip of the second adjustment tube. Is embedded, and the rotation preventing piece projects toward the first positioning adjusting pipe side at the tip of the second positioning adjusting pipe, and the rotation preventing piece is provided on the first positioning adjusting pipe. The gist is to provide a receiving member to be engaged.

According to the first aspect of the present invention, a bar member made of a diagonal member such as a PC steel bar and the like installed on the skeleton side is gripped by the clamp of the first adjusting tube, and the clamp is clamped by the second adjusting tube. If the bar-shaped member to be connected to the bar-shaped member on the skeleton side is grasped, the axes of both the bar-shaped members coincide in this state. Then, if the overlap length is adjusted by sliding the first and second adjusting tubes, the distance between the two rod-shaped member tubes can be adjusted, and the threading pitches also match.

According to the second aspect of the present invention, in addition to the above-described operation, the bolt which is protruded into the first adjusting tube is screwed to the nut embedded in the second adjusting tube. By turning, the second adjustment tube slides with respect to the first adjustment tube, whereby the polymerization length can be finely adjusted.

According to the third aspect of the present invention, the rotation preventing piece provided on the second adjusting pipe is engaged with the receiving member provided on the first adjusting pipe, so that the first and second adjusting pipes are engaged. The adjusting tubes can be prevented from rotating independently, and the positions of the clamps provided on the adjusting tubes can be prevented from deviating from the same line.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a front view showing an embodiment of a connecting jig for a rod-shaped member of the present invention, FIG. 2 is an upper side view thereof, and FIG. 4 is a bottom view thereof. FIG. 4 shows an example of a connecting jig of the present invention. It is used when connecting a bar-shaped member such as a PC steel bar, which is a diagonal member 3 for connecting the main girder portion 1 and the main tower portion 2 of such a cable stayed bridge.

The connecting jig of the present invention is such that the end portion of the second adjusting tube 6 for positioning is slidably combined coaxially with the first adjusting tube 5 for positioning. 6 is formed at the reduced diameter portion 7, and the reduced diameter portion 7 is connected to the first adjusting pipe 5.
Slide freely into the inside of.

A pair of clamps 8a and 8b are mounted on the side of the first and second adjusting pipes 5 and 6, respectively, for holding a bar-shaped member such as the diagonal member 3 so as to be positioned on the same line. As an example, the clamps 8a and 8b are provided with a support piece 9 having an L-shaped cross section projected from the side of the adjusting pipes 5 and 6 by welding.
The supporting piece 9 and the pressing piece 10 are connected to each other with bolts 11 and nuts 12 so that the overall shape becomes a U-shaped cross section.

In the drawing, reference numeral 13 denotes a bolt 11 between the supporting piece 9 and the pressing piece 10.
A spring is shown wound around and is biased in a direction to separate the pressing piece 10 from the supporting piece 9.

Further, inside the support piece 9, a rod-shaped support member 14 for supporting a side portion of the diagonal member 3 is provided at a vertical position.

As a mechanism for finely adjusting the overlap length of the first and second adjusting tubes 5 and 6, a long bolt 15 is projected from the end of the first adjusting tube 5 toward the inside, and A nut 16 with which the bolt 15 is screwed is buried at the end of the reduced diameter portion 7 of the adjusting pipe 6.

As a mechanism for preventing the clamps 8a and 8b from coming off the same line, a slender plate-like rotation stop is provided at the tip of the second adjusting tube 6 for positioning toward the first adjusting tube 5 for positioning. The strip 17 is protruded, and a belt-shaped receiving member 18 with which the rotation preventing piece 17 is inserted and engaged with the first adjusting pipe 5 for positioning is provided.

In the drawing, reference numeral 19 denotes a lever block hook protruding from the upper part of each of the adjusting tubes 5 and 6.

Next, the usage will be described. The end of the oblique member 3 a previously installed on the main girder 1 or the main tower 2 on the skeleton side is locked to the clamp 8 a of the first adjusting pipe 5. In this case, if the nut 12 is loosened, the pressing piece 10 moves outward due to the elasticity of the spring 13 and the distance between the supporting piece 9 and the pressing piece 10 increases. Diagonal material 3a between
Is inserted from below, and the side of the diagonal member 3a contacts the support member 14.

Then, when the nut 12 is tightened, the pressing piece 10 is pressed toward the supporting piece 9, and the diagonal member 3 a is attached to the supporting piece 9 and the pressing piece 10.
And fixed here.

The coupler 4 is previously driven into the threaded portion at the tip of the diagonal member 3a.

The clamp 8b of the second adjusting pipe 6 clamps and fixes the end of the diagonal member 3b to be connected in the same manner as described above.

In this state, since the clamps 8a and 8b are on the same line, the diagonal members 3a and 3b also have the same axis.

Here, the diagonal member 3a fixed to the clamp 8a
Is installed in the main tower section 2, the two adjusting pipes 5, 6
Attach a lever block to the hook 19 provided on the, and wind up the lever block to slide and insert the reduced diameter portion 7 of the second adjustment tube 6 into the inside of the first adjustment tube 5 to shrink the entire connection jig, The diagonal member 3b to be connected is pulled up to reduce the distance between the ends of the diagonal members 3a and 3b. During this operation, since the rotation preventing piece 17 is interposed between the adjusting pipes 5 and 6, only one of the pipes rotates and the axes of the diagonal members 3a and 3b do not shift.

The distance between the diagonal members 3a and 3b is reduced to a position immediately before the leading ends thereof come into contact with each other.
A pitch gauge 20 is applied to the threaded part at the tip of a, 3b,
It is checked whether the pitch of the diagonal members 3a and 3b and the pitch of the coupler 4 match, and if they match, the threaded portion of the diagonal member 3b to be connected by rotating the coupler 4 is connected to the coupler 4 of a predetermined length. The coupler 4 is moved until it overlaps, and the diagonals 3a and 3b are connected by the coupler 4.

If the pitch of the diagonal members 3a and 3b does not match the pitch of the coupler 4, the distance between the tips of the diagonal members 3a and 3b is adjusted again by the lever block so that the pitches match.

After connecting the oblique members 3a and 3b with the coupler 4, the nuts 12 of the clamps 8a and 8b are loosened, the clamps 8a and 8b are removed, and the connection jig is removed.

On the other hand, in the case where the diagonal member 3a fixed to the clamp 8a is installed on the main girder part 1, the upper end of the diagonal member 3b to be connected is already connected to the main tower 2 side and the diagonal member 3b
Since the length has already been adjusted, the distance between the oblique members 3a and 3b is small at the time of fixing to the clamp 8b.

Therefore, in this case, it is not necessary to greatly reduce the overlapping length between the adjusting tubes 5 and 6 by the lever block as described above, and the bolt 15 for fine adjustment is turned to reduce the diameter of the second adjusting tube 6. The part 7 is slid in the first adjusting pipe 5 and
The pitches of the threaded portions a and 3b are matched. Subsequent operations are the same as described above.

[0032]

As described above, the jig for connecting a bar-shaped member according to the present invention is used when connecting a diagonal member such as a PC steel rod installed on the skeleton side with a diagonal member stretched between the skeletons. By simply fixing the diagonal material to the clamp of the connecting jig, the axes of both diagonal materials can be easily aligned, and by simply adjusting the length of the connecting jig, threading of both diagonal materials The pitch can be easily matched, and since the shaft core and the threading pitch are matched, there is no need to disperse the assembly by a conventional lever block or cutting wood, so that the workability is good and the safety is improved.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a jig for connecting a rod-shaped member of the present invention.

FIG. 2 is a side view showing an embodiment of a jig for connecting a rod-shaped member of the present invention.

FIG. 3 is a bottom view showing an embodiment of a jig for connecting a rod-shaped member according to the present invention.

FIG. 4 is a front view of a cable stayed bridge in which the jig for connecting a rod-shaped member of the present invention is used.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Main girder part 2 ... Main tower part 3, 3a, 3b ... Diagonal material 4 ... Coupler 5 ... First adjustment pipe 6 ... Second adjustment pipe 7 ... Reduced diameter part 8a, 8b ... Clamp 9 ... Support piece 10 ... Pressing piece 11 ... Bolt 12 ... Nut 13 ... Spring 14 ... Support member 15 ... Bolt 16 ... Nut 17 ... Rotation prevention piece 18 ... Receiving member 19 ... Hook 20 ... Pitch gauge

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yukimitsu Sanpaku 6-3-2 Toyo, Koto-ku, Tokyo Kashima Construction Co., Ltd. Kanto Branch (72) Inventor Eitaro Imai 3-27 Tadara, Nerima-ku, Tokyo No. 11 Minakae Construction Industry Co., Ltd. (58) Field surveyed (Int. Cl. ⁷ , DB name) E01D 21/00 E01D 11/00 E01D 19/10

Claims (3)

(57) [Claims] 1. A connecting jig for positioning two rod-shaped members when the ends of the two rod-shaped members are connected to each other.
An end of the second positioning adjustment tube is slidably combined on the same axis of the first positioning adjustment tube, and a clamp for holding the rod-shaped member is provided on a side of each of the first and second adjustment tubes. A jig for connecting rod-shaped members, which is provided on the same line. 2. An elongated bolt for fine adjustment is projected inside the first positioning adjustment tube toward the second adjustment tube,
The jig for connecting a rod-shaped member according to claim 1, wherein a nut into which the bolt is screwed is embedded at a tip of the second adjusting pipe. 3. A rotation preventing piece protrudes from a tip of a second positioning adjusting pipe toward the first positioning adjusting pipe, and the rotation preventing piece engages with the first positioning adjusting pipe. The jig for connecting a rod-shaped member according to any one of claims 1 and 2, further comprising a receiving member.