JP2004068443A - Jig for tensing and holding stranded wire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a jig for tensing and holding a stranded wire pushing and fitting a gripper efficiently and uniformly into a cone in the case of the connection of a clamping tool of the PC stranded wire. <P>SOLUTION: The jig for tensing and holding the stranded wire is composed of a first vertical member 11, a second vertical member 12, a third vertical member 13, a first horizontal member 21 and a second horizontal member 22. The member 21 is supported pivotally at the lower end of the member 11 at one end, inserted into a through-hole formed in the member 13 at the other end and screwed, and a space between the upper ends of the member 11 and the member 13 is expanded and can be brought into close contact with an outer peripheral surface. The member 22 is supported pivotally to the member 12 in the vicinity of one end, inserted into the through-hole formed in the member 13 at the other end and screwed, and the space between the upper ends of the member 12 and the member 13 is expanded and the gripper 31 is pushed into a recess of the cone 32. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method of connecting a concrete structure such as a box culvert or the like with a suitable compressive force by a PC stranded wire or the like. The present invention relates to a stranded wire tension holding jig used for fixing.
[0002]
[Prior art]
Construction work of connecting concrete structures such as box culverts with a suitable compressive force by using PC stranded wires or the like is widely adopted. To connect concrete structures, etc., first, as shown in FIGS. Two or more concrete structures 1, 2, 3 etc. to be connected are installed, and a PC twisted wire 5, etc., is inserted into a through hole (sheath hole) 4 formed in the concrete structures 1, 2, 3 etc. Then, a washer, a cone, and a gripper are inserted into one end of the PC stranded wire or the like 5 at a joint cup (space portion) 6 provided at the center portion of the fixed-side concrete structure 1, and the gripper is hammered into the cone with a hammer and a rag. The gripper (both of which constitutes a fastener) is fixed, and the PC stranded wire 5 or the like 5 is pressed and fixed by the gripper.
[0003]
Next, a hydraulic jack is provided at the external portion A of the tension-side concrete structure 3 and the like, and the PC stranded wire 5 and the like are fixed to the hydraulic jack, and a prescribed tension is applied to the PC stranded wire 5 and the like. While the tension is continuing, the gripper of the washer, cone, and gripper previously inserted into the joint cup (space portion) C of the tension-side concrete structure 3 is knocked using a hammer and a slot. The concrete structures 1, 2, and 3 were connected to each other while maintaining the tension on the PC stranded wires 5 by fixing.
[0004]
[Problems to be solved by the invention]
However, in the narrow opening of the joint cup (space portion) 6 of the concrete structure, it is necessary to drive a plurality of grippers at one place. However, since the gripper is narrow, the surface of the gripper and the surface of the head of the gripper are the same. Since it was not possible to form the surface, and it was not possible to hammer the slug obliquely with respect to the surface of the gripper head, it was a laborious and time-consuming operation.
[0005]
Also, since packing for preventing grout leakage is usually attached to the washer, when hitting the gripper with a hammer when hitting the gripper with a hammer, the packing acts as a cushion and the gripper is attached to the cone. I could not drive efficiently.
[0006]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a twisted wire tension holding jig capable of efficiently and uniformly pressing and fitting a gripper to a cone when connecting a PC twisted wire fastener.
[0007]
[Means for Solving the Problems]
The present invention achieves this object, and the invention according to claim 1 includes a first vertical member, a second vertical member, a third vertical member, a first horizontal member, and a second horizontal member. The first horizontal member is rotatably supported at one end by a lower end of the first vertical member, and is inserted through a through-hole formed in the third vertical member at the other end. The distance between the upper ends of the first and third vertical members is enlarged by fixing the distance between the lower ends of the first and third vertical members with a nut so as to be adjustable. The second horizontal member is supported by the second vertical member near one end thereof, and is inserted through a through hole formed in the third vertical member at the other end thereof. It is screwed, and the distance between the lower ends of the second vertical member and the third vertical member is reduced by a nut, so that the distance between the second vertical member and the third vertical member is increased. Expanding the spacing parts are stranded tensioning holding jig being characterized in that none to push the gripper into the recess of the cone.
[0008]
The invention according to claim 2 is characterized in that the upper ends of the first, second and third vertical members are substantially U-shaped so that they can be easily arranged from below. 2. The jig for holding tension of a stranded wire according to item 1.
[0009]
According to a third aspect of the present invention, there is provided the stranded wire tension holding jig according to the first aspect, wherein one end of the second horizontal member is easily projected with a hammer or the like.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.
[0011]
1 to 4, reference numeral 10 denotes a stranded wire tension holding jig of the present invention. The stranded wire tension holding jig 10 includes a first vertical member 11, a second vertical member 12, and a third vertical member 13. And the first horizontal member 21 and the second horizontal member 22.
[0012]
The upper end of the first vertical member 11 has a shape that can be fitted to the outer periphery of the cone 32 from below, for example, a U-shape, and the lower end is pivotally supported by the left end of the first horizontal member 21. Further, the first vertical member 11 includes a protruding horizontal member 121 protruding in the direction of the third vertical member 13 at a substantially central portion, and one end thereof is pivotally supported at a substantially central portion of the third vertical member 13.
[0013]
The upper end of the second vertical member 12 surrounds the PC stranded wire 5 from below and has a U-shaped shape capable of abutting the gripper 31. The lower end is supported near the left end of the second horizontal member 22.
[0014]
The upper end of the third vertical member 13 has a U-shape that surrounds the PC stranded wire 5 from below and can abut on the joint cup 6. And a through hole through which a first horizontal member 21 and a second horizontal member 22 can be fitted is drilled at the lower end, and a first horizontal member 21 and a second horizontal member 22 are formed. Is inserted.
[0015]
As described above, the first horizontal member 21 is pivotally supported at the left end portion with the first vertical member 11, and the right end portion is inserted into the through hole of the third vertical member 13, and is further screwed, The distance between the lower ends of the first vertical member 11 and the third vertical member 13 can be adjusted by the nut 211.
[0016]
The second horizontal member 22 is pivotally supported near the left end with the second vertical member 12, the right end is inserted into a through hole of the third vertical member 13, and is further screwed, and is screwed with a nut 221. The distance between the lower ends of the second vertical member 12 and the third vertical member 13 can be adjusted. A projection 222 is formed on the left end of the second horizontal member 22 so as to be easily hit with a hammer or the like.
[0017]
Since the stranded wire tension holding jig 10 of the present invention has the above structure, it is inserted from below into the joint cup 6 into which the PC stranded wire 5 shown in FIG. 5 is inserted as shown in FIG. The upper end of the first vertical member 11 is fitted to the outer periphery of the cone 32, and the upper ends of the second vertical member 12 and the third vertical member 13 are arranged so as to surround the outer periphery of the PC stranded wire 5. The gripper 31 can be pushed into the recess of the cone 32 by the operating means.
[0018]
Hereinafter, the operation means will be described.
As shown in FIG. 7, by tightening the nut 211 of the first horizontal member 21, the interval between the lower ends of the first vertical member 11 and the third vertical member 13 is reduced, and the interval between the central portions is fixed. The interval between the upper ends is widened, and the upper end of the first vertical member 11 is in close contact with the cone 32 and pressed together with the washer 33 and the packing 34 by the joint cup 6, while the upper end of the third vertical member 13 is connected to the joint cup 6. Pressed.
[0019]
In this state, the PC stranded wire 5 is tensioned by the hydraulic jack disposed at the position A in FIG. 11 and the nut 221 of the second horizontal member 22 is tightened, so that the second vertical member 12 and the third vertical member 13 The interval between the lower ends is narrowed, the interval between the upper ends is widened, and the upper end of the second vertical member 12 can press the gripper 31 and push it into the cone 32. The cone 32 has, for example, a conical shape at the point of contact with the gripper 31, and the gripper 31 also has substantially the same shape. 5 can be fixed.
[0020]
As shown in FIG. 8, when the left end 222 of the second horizontal member 22 is hit with a hammer or the like, the pushing amount of the gripper 31 can be increased. At this time, when the nut 221 of the second horizontal member 22 is loosened, as shown in FIG. 9, the operation of tightening and hitting the nut 221 can be repeated to maximize the pushing amount of the gripper 31. . As shown in FIG. 10, when the push-in of the gripper 31 is completed, the nuts 211 and 221 are loosened, and the jig 10 for holding the tension of the stranded wire of the present invention is removed.
[0021]
【The invention's effect】
By using the jig for holding the tension of the stranded wire of the present invention, it is possible to apply the gripper to the cone along the central axis without biasing the pressing force to the cone at the time of joining the fastener of the PC stranded wire, and efficiently and uniformly. It can be pressed and fitted.
[Brief description of the drawings]
FIG. 1 is a front view showing a use state of an example of a jig for holding strand tension according to the present invention, and corresponds to an enlarged view of a portion C in FIG.
FIG. 2 is a left side view of the jig for holding strand tension in FIG. 1;
FIG. 3 is a right side view of the jig for holding strand tension in FIG. 1;
FIG. 4 is a plan view of the jig for holding tension in the stranded wire of FIG. 1;
FIG. 5 is an explanatory view showing a state before use of the stranded wire tension holding jig of FIG. 1;
FIG. 6 is an explanatory view showing a use state of the jig for holding the tension of the stranded wire of FIG. 1;
FIG. 7 is an explanatory view showing a use state of the jig for holding the tension of the stranded wire of FIG. 1;
FIG. 8 is an explanatory view showing a use state of the jig for holding the strand tension in FIG. 1;
FIG. 9 is an explanatory diagram showing a use state of the jig for holding the tension of the stranded wire of FIG. 1;
FIG. 10 is an explanatory view showing a use state of the jig for holding the tension of the stranded wire of FIG. 1;
FIG. 11 is an explanatory view of the present invention and a conventional construction method.
FIG. 12 is an explanatory diagram of the explanatory diagram of FIG. 11 as viewed from the side.
[Explanation of symbols]
1,2,3: Concrete structures, etc. 4: Through holes (sheath holes)
5: PC stranded wire, etc. 6: Joint cup (space)
10: stranded wire tension holding jig 11: first vertical member 12: second vertical member 121: projecting horizontal member 13: third vertical member 21: first horizontal member 211: nut 22: second horizontal member 221: nut 222: Projection 31: Gripper 32: Cone 33: Washer 34: Packing

Claims (3)

The first horizontal member includes a first vertical member, a second vertical member, a third vertical member, a first horizontal member, and a second horizontal member, and the first horizontal member has, at one end, a lower end of the first vertical member and a pivotal support. The other end is inserted into a through hole formed in the third vertical member, and is further screwed, and a nut is used to adjust the distance between the first vertical member and the lower end of the third vertical member. By being fixed so as to be adjustable, the distance between the upper end portions of the first and third vertical members is enlarged so that the outer peripheral surface can be in close contact with the second vertical member. The other end is inserted through a through-hole formed in the third vertical member, and is further screwed, and the lower end of the second vertical member and the third vertical member is fastened with a nut. By reducing the gap, the gap between the upper end of the second vertical member and the third vertical member is enlarged to push the gripper into the recess of the cone. Stranded tensioning the holding jig according to claim. The upper end portion of the first vertical member, the second vertical member, and the third vertical member has a substantially U-shape so as to be easily disposed from below, and is used for maintaining tension in a stranded wire. jig. 2. The jig for holding tension in a stranded wire according to claim 1, wherein one end of the second horizontal member is easily projected with a hammer or the like.

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