JP2001317160A - Auxiliary for connecting pc steel strand wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an auxiliary implement for connecting PC steel strand wires, capable of automatically aligning by only placing it on a connecting auxiliary implement and fastening with a screw and capable of quickly and easily performing the connecting work and capable of previously preventing the breakdown of a screw part during the work. SOLUTION: This auxiliary implement for connecting PC steel strand wires is formed of a pair of gutter-like holding members, which is formed with a surface for holding a male screw part of a plug and a socket with a semicylindrical surface having the same diameter with the outer diameter of the male screw part of the plug and a recessed curved surface having the same diameter with the outer diameter of the socket and a wall surface formed in the boundary between both the curved surfaces at a right angle against the axial direction, and a fastening member for fastening the pair of holding members having the recessed surfaces facing each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a connection aid used for connecting a PC steel strand using a coupler (connector using a wedge) in a prestressed concrete method.

[0002]

2. Description of the Related Art A connecting member of a PC steel stranded wire in a prestressed concrete method comprises a plug having an operating part in the center and male screw parts having screw directions opposite to each other on the left and right sides thereof, and screwing into left and right male screw parts of the plug. It consists of a pair of left and right sockets that can be used, and a plurality of wedges that are divided into a plurality of pieces to fix the PC stranded wires in the sockets.

[0003] Then, the connection work using the above-mentioned connection tool is performed as follows.
A part of the female thread of the primary socket, which holds the primary PC stranded wire by a wedge, is screwed into the primary socket male screw of the plug to complete the fixing of the primary PC stranded wire. Then, the secondary side PC steel strand is attached to the secondary side socket with a wedge, the female screw for secondary side socket screwing of the plug is screwed, and then the socket is rotated, so that the male screw part of the plug and the socket are connected. The female screw portion was screwed sufficiently.

[0004]

By the way, in order to connect a pair of PC stranded wires using the above-mentioned connecting tool, it is necessary to align the center line of the secondary socket with the center line of the plug. In the past, the user had to work with a register based on visual measurements, so it was time-consuming to work. In addition, the secondary socket was hit against the thread of the plug, or the secondary socket was Or, they may be inserted in a slanted state, and the threaded portions may be damaged. Accordingly, the present invention provides a primary socket having a primary PC steel strand attached thereto and a secondary socket having a secondary PC steel strand attached thereto when connecting a PC strand using a coupler. It is an object of the present invention to provide a connection assisting tool that can easily and surely perform centering of a connection.

[0005]

Means for Solving the Problems The above problems are solved by the present invention having the following constitution. (1) On the inner surface, a semicircular concave surface portion having the same diameter as the outer diameter of the male screw portion of the plug, a concave curved surface portion having the same diameter as the outer diameter of the socket, and perpendicular to the axial direction formed at the boundary between the two curved surface portions. A pair of gutter-shaped holding members that form a surface for holding the male screw portion of the plug and the socket, and a fastening member for fastening the pair of holding members that face the concave curved surface. Characteristic assistant for connecting PC steel strands. (2) fastening members project on both sides of the gutter-shaped holding member,
The PC steel stranded wire connecting aid according to (1), further comprising a fastening portion having a hole for bolt installation.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings according to an embodiment. In the description, the side on which PC steel strands have already been installed is one based on the installation order.
The secondary side is expressed as the secondary side, and the side installed using the connection aid of the present invention is expressed as the secondary side.

FIG. 1 shows one gutter-like configuration of the connecting auxiliary tool 10 in the step of connecting a pair of PC steel stranded wires Pa and Pb using the PC steel stranded wire connecting auxiliary tool 10 according to the present invention. A secondary side male screw portion 22b of the plug 20 partially screwed into the primary side socket 30a on which the primary side PC steel strand Pa is mounted on the member 11a and a wedge (40 (FIG. 2)) on the secondary side. FIG. 2 is a perspective view showing a state where a secondary socket 30b to which a PC steel strand Pb is attached is placed, and FIG.
FIG. 9 is a cross-sectional view showing a state in which the secondary male screw portion 22b and the secondary socket 30b of the plug 20 placed on one gutter-like member 11a are covered with the other gutter-like member 11b in the above process. .

[0008] In the drawing, reference numeral 10 denotes a connection aid according to the present invention, which is a pair of gutter-like members 11 made of steel for machine structural use.
a, 11b facing each other, bolt 17, ..., nut 1
8 and the gutter-like members 11a, 1
1b has a semicircular concave surface portion 12 having the same diameter as the outer diameter of the male screw portion 22 of the plug 20, and the socket 30 (30a, 30a).
0b) has a concave curved surface portion 13 having the same diameter as the outer diameter, and a wall surface 14 perpendicular to the axial direction is formed between the curved surface portions 12 and 13 so that the secondary male screw portion 22b of the plug 20 and The secondary socket 30b is held. Further, the gutter-like member 11 (11a, 11b) tightens the pair of gutter-like members 11a, 11b in a state where the plug 20 and the socket 30 (30a, 30b) are sandwiched.
1a and 11b), and fastening portions 15 and 15 having bolt mounting holes 16 and so on.

[0009] Next, the P using the connection aid 10
The connection work of the C steel strands Pa and Pb will be described. On the part of one gutter-like member 11 a, the secondary-side male screw part 22 b of the plug 20 with the primary-side PC steel wire Pa attached thereto is aligned with the vertical wall part 14 of the gutter-like member 11. Place and 2
The secondary socket 30b is placed so that the distal end of the secondary socket 30b is in contact with the distal end of the secondary external thread 22b of the plug 20, and is covered with the other gutter-shaped member 11b. The secondary socket 30b is clamped.

[0010] Fastening portion 1 of a pair of gutter-like members 11a, 11b
When bolts 17,... Are inserted and screwed into holes 16,.
a, 11b come close to each other, and finally come into close contact, so that the secondary external threaded portion 22b and the secondary socket of the plug 20 sandwiched between the two gutter-shaped members 11a, 11b. 30b is in a series state, and the axes of the two coincide. By rotating the plug 20 in the tightening direction while pressing the secondary socket 30b toward the plug 20, the secondary external thread portion 22b of the plug 20 and the secondary socket 30b are rotated.
Of the female screw portion 31b is started.

A secondary external thread 22b of the plug 20 and a female thread 31b of the secondary socket 30b (although not shown, the primary socket 30a has a female thread 31a).
Is screwed in, the operation unit 2 is then manually or manually operated.
1, the plug 20 is rotated in the tightening direction, and the primary socket 30a and the secondary socket 30b are drawn toward each other. Further, the rotation of the plug 20 is continued, and when a predetermined tightened state is reached, the bolts 17,... Are loosened to remove the upper and lower gutter-like members 11a and 11b, and the primary PC steel strand Pa and the secondary PC steel strand are used. The connection work of the line Pb is completed.

In the above example, the outer surface of the gutter-shaped member is formed into a half-cut cylindrical shape. However, if the inner surface satisfies the above conditions, the shape may be square, and a pair of gutters may be used. Although a bolt is used as a fastener for the shaped member, it is possible to use a fastener that performs the same function.

[0013]

According to the present invention, the centering can be automatically performed only by placing on the connection assisting tool and tightening the screws, and the connecting operation can be performed quickly and easily, and the simple operation can be performed. Therefore, it is possible to prevent the screw portion from being damaged during the operation.

[Brief description of the drawings]

FIG. 1 is a perspective view of a connection aid according to the present invention.

FIG. 2 is a cross-sectional view of a connection aid according to the present invention.

[Explanation of symbols]

10: connection aid, 11 (11a, 1
1b): gutter-like member, 12: concave curved surface portion (plug support portion),
13: concave curved surface portion (socket support portion), 14: vertical wall portion, 15: fastening portion, 16: fastener insertion hole, 17: bolt, 18: nut,
20: plug, 21: operation unit,
22 (22a, 22b): male screw part, 3
0 (30a, 30b): Socket, 31 (31a, 31)
b): female screw part, 40: wedge,
Pa, Pb: PC steel strand,

Claims (2)

[Claims] 1. An inner surface having a semicircular concave surface portion having the same diameter as the outer diameter of the male screw portion of the plug, a concave curved surface portion having the same diameter as the outer diameter of the socket, and an axial direction formed at a boundary between the two curved surface portions. And a pair of gutter-like holding members that form a surface for holding the male screw portion of the plug and the socket by a wall surface perpendicular to the plug, and a fastening member for fastening the pair of holding members that face the concave curved surface. An auxiliary tool for connecting a PC steel strand. 2. The auxiliary tool for connecting a PC steel strand according to claim 1, wherein the fastening member is a fastening portion projecting on both sides of the gutter-shaped holding member and having a hole for bolt installation. .