JP2012012776A - Pull-out pin and method of correcting position shift of bolt hole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pull-out pin for which the generation of hitting sound is dissolved, falling from a bolt hole is prevented and safety is improved.SOLUTION: A pull-out pin 11 is press-fitted to a bolt hole 31 provided on a member joint part and corrects the position shift of the bolt hole 31. The pull-out pin 11 includes a pin body part 12 and a nut member 13 freely detachably screwed to the pin body part 12. The pin body part 12 includes at least a cylinder part 14, a tapered part 15 connected to one end 14a of the cylinder part 14 and gradually narrowed toward the distal end side, and a male screw part 16 connected to the tapered part 15. The nut member 13 is formed in a required length and includes a female screw part 18 to be screwed with the male screw part 16 on the inner peripheral surface on the side of one end 17.

Description

  The present invention relates to a pull-out pin and a method for correcting a displacement of a bolt hole, and more specifically, a bolt hole provided in a member joint portion mainly in a steel assembly operation such as building construction or bridge construction. The present invention relates to a drawing pin used for correcting a positional deviation and a method for correcting a positional deviation of a bolt hole.

  Conventionally, this type of drift pin is, for example, at the front end side with respect to the bolt hole of the member joint part at the time of bolt construction or at the stage of hole alignment between members in steel assembly work such as building construction or bridge construction. Are inserted into the bolt hole by forcing the base-side retaining member with a hammer.

  In JP 2000-46024 A and JP 2001-322073 A, drift is used for correcting misalignment of a joint hole when joining columns, beams, and the like in a steel assembly work for building construction. A pin is disclosed (see Patent Documents 1 and 2).

JP 2000-46024 A JP 2001-322073 A

  The conventional drift pin has a problem that it generates noise in the vicinity because the hitting sound when hit with a hammer or the like is considerably large.

  Further, when hit with a hammer or the like, the reaction may cause the drift pin to fall off to the opposite side of the bolt hole, and in this case, there is a problem that it is very dangerous for work.

  Therefore, the drift pin in the conventional example has a problem that must be solved to eliminate the occurrence of the hitting sound and to prevent the falling out of the bolt hole to improve safety.

  The gist of the present invention for solving the problems of the conventional example is a drawing pin that press-fits into a bolt hole provided in a member joint and corrects a positional deviation of the bolt hole, and the drawing pin is The pin body part is composed of a pin member and a nut member that is detachably screwed to the pin body part. The pin body part is connected to the cylindrical part and one end of the cylindrical part and goes to the tip side. And at least a tapered portion that gradually narrows along with the male threaded portion connected to the tapered portion. The nut member is formed to a required length, and the male threaded portion and the screw are formed on an inner peripheral surface on one end side. It is to provide a mating female screw part.

The other end of the cylindrical portion is provided with a reduced diameter portion through a step portion, and the reduced diameter portion has a through hole, and a locking pin is detachably locked in the through hole. thing,;
Is included.

  Further, the gist of the present invention is a method for correcting a positional deviation of a bolt hole provided in a member joint portion using the extraction pin according to claim 1, wherein the male screw of the pin main body portion is provided in the bolt hole. The pin body portion is press-fitted into the bolt hole by inserting one end side of the nut member into the male screw portion and forcibly screwing the female screw portion into the male screw portion. Correct the displacement of the bolt hole, remove the nut member from the male threaded portion, invert the removed nut member, and insert the other end of the nut member into the male threaded portion. By forcibly screwing the female screw portion, the pin main body portion is moved in the direction of removal from the bolt hole.

  According to the drawing pin of the present invention, the pin main body portion is inserted into the bolt hole by inserting one end side of the nut member into the male screw portion inserted through the bolt hole and forcibly screwing the female screw portion. Since the displacement of the bolt hole can be corrected by press-fitting, there is no need to hit with a hammer as in the conventional example, and there is an excellent effect that no noise is generated.

  The other end of the cylindrical portion is continuously provided with a reduced diameter portion via a stepped portion, and the reduced diameter portion has a through hole, and a locking pin is removably locked in the through hole. As a result, the locking pin is hooked on the edge of the bolt hole, so that the pin main body portion does not fall off to the opposite side of the bolt hole against the will of the worker, and an excellent effect of improving safety is achieved.

Further, according to the position correction method of the bolt hole according to the present invention, by inserting one end side of the nut member and forcibly screwing the female screw part into the male screw part inserted through the bolt hole, Since the pin main body is press-fitted into the bolt hole and the positional deviation of the bolt hole is corrected, it is not necessary to hit with a hammer as in the conventional example, and no noise is generated.
Also, when one end side of the nut member is inserted into the male screw portion and the female screw portion is screwed into the base portion of the male screw portion, the pin main body portion is positioned in the bolt hole, and the pin main body portion However, it does not fall out to the opposite side of the bolt hole.
Furthermore, after reversing the nut member, when the other end side of the nut member is inserted into the male screw portion and the female screw portion is screwed into the base portion of the male screw portion, the other end of the cylindrical portion is It will be located in the edge part of a bolt hole, and a pin main-body part will not fall out to the other side of a bolt hole contrary to will.
That is, in combination with the presence of the above-described locking pin, the pin main body portion does not fall out to the opposite side of the bolt hole against the will of the worker, so safety is markedly improved compared to the conventional drift focus. There are various excellent effects of improving.

It is a perspective view of the extraction pin 11 which concerns on this invention. It is the perspective view which isolate | separated and showed the extraction pin 11 which concerns on this invention to the pin main-body part 12 and the nut member 13. FIG. It is a front view of the extraction pin 11 which concerns on this invention. 3 is a front view of a pin main body 12. FIG. 4 is a front view of a nut member 13. FIG. 3 is a cross-sectional view of the nut member 13. FIG. FIG. 6 is an explanatory view showing a state in which the male screw portion 16 of the pin main body portion 12 is inserted into the bolt hole 31. FIG. 6 is an explanatory view showing a state in which the female thread portion 18 of the nut member 13 is screwed into the male thread portion 16 and the pin body portion 12 is press-fitted into the bolt hole 31. It is explanatory drawing which shows the state which inserts the inverted nut member 13 in the external thread part. It is explanatory drawing which shows the state which screwed the internal thread part 18 of the nut member 13 in the external thread part 16, and moved the pin main-body part 12 from the bolt hole 13 to the removal direction. It is explanatory drawing which shows the state which screwed the internal thread part 18 of the nut member 13 in the external thread part 16, and moved the pin main-body part 12 from the bolt hole 13 to the removal direction. It is explanatory drawing which shows the state which removed the pin main-body part 12 from the bolt hole 13. FIG. It is explanatory drawing which shows the state which fastened the bolt 32 and the nut 33 to the bolt hole 13. FIG.

  Next, embodiments of the present invention will be described with reference to the drawings. First, in FIG. 1 to FIG. 3, reference numeral 11 denotes an extraction pin. The extraction pin 11 includes a pin body portion 12 and a nut member 13 that is detachably screwed to the pin body portion 12. Is done.

  The pin main body portion 12 includes a cylindrical portion 14, a tapered portion 15 provided continuously with one end 14 a of the cylindrical portion 14 and gradually becoming narrower toward the distal end side, and a male screw portion 16 provided continuously with the tapered portion 15. With.

  The other end 14 b of the cylindrical portion 14 is continuously provided with a reduced diameter portion 27 through a step portion 26, and the reduced diameter portion 27 has a through hole 28 formed therein. A locking pin 29 is detachably locked in the through hole 28.

  As shown in FIGS. 3 and 5, the nut member 13 has a length slightly shorter than the male screw portion 16, and the outer periphery is formed in a hexagonal nut shape. Moreover, as shown in FIG. 6, the inside is formed hollow, and the internal thread part 18 is formed in the inner peripheral surface near the one end 17 side. The female screw portion 18 can be screwed with the male screw portion 16 of the pin main body portion 12.

  Further, a gap portion 20 is formed on one end 17 side of the female screw portion 18 via a step portion 19. Further, a gap portion 23 is formed on the other end 21 side of the female screw portion 18 via a step portion 22, and a gap whose diameter is enlarged via a step portion 24 is formed on the other end 21 side of the gap portion 23. A portion 25 is formed (see FIG. 6).

  Next, a method of correcting the positional deviation of the bolt hole 31 provided in the member joint portion such as the steel material 30 using the extraction pin 11 configured as described above will be described.

  First, as shown in FIG. 7, the male screw portion 16 of the pin main body portion 12 is inserted into the bolt hole 31. At this time, about two-thirds of the length of the tapered portion 15 is located inside the bolt hole 31. Then, the one end 17 side of the nut member 13 is inserted into the male screw portion 16.

Then, as shown in FIG. 8, the female screw portion 18 of the nut member 13 is forcibly screwed into the male screw portion 16. When the female screw portion 18 is screwed in, the pin main body portion 12 is forcibly moved to the distal end side, and the pin main body portion 12 is press-fitted into the bolt hole 31 to correct the positional deviation of the bolt hole 31.
In a state where the female screw portion 18 is screwed to the base portion of the male screw portion 16 (see FIG. 8), the pin main body portion 12 is positioned in the bolt hole 31, so that the pin main body portion 12 is bolted against the operator. It does not fall out on the opposite side of the hole 31.

  In the extraction pin 11 in such a state, the pin main body portion 12 is left in the bolt hole 31 and is left for a necessary period.

  Further, a method for removing the pin main body 12 from the bolt hole 31 will be described. First, the locking pin 29 is removed from the through hole 28. And as shown in FIG. 9, the nut member 13 is removed from the external thread part 16, and the left and right of the removed nut member 13 are reversed. That is, the other end 21 side of the nut member 13 is directed toward the male screw portion 16 and then the other end 21 side is inserted into the male screw portion 16.

Subsequently, as shown in FIGS. 10 and 11, the female screw portion 18 of the nut member 13 is forcibly screwed into the male screw portion 16. As the female screw portion 18 is screwed, the pin main body portion 12 moves from the bolt hole 31 in the removal direction (tip direction).
In a state in which the female screw portion 18 is screwed to the base portion of the male screw portion 16 (see FIG. 11), the other end 14b of the cylindrical portion 14 is located at the end portion of the bolt hole 31, so that the pin main body portion 12 is the worker. Contrary to the above, the bolt hole 31 does not fall out.

  The pin main body portion 12 in which the other end 14b of the cylindrical portion 14 is located at the end portion of the bolt hole 31 (see FIG. 11) can be easily removed by an operator (see FIG. 12). 12 will surely fit in the hands of the workers.

  After correcting the displacement of the bolt hole 31 in this manner, the bolt 32 and the nut 33 can be fastened to the bolt hole 31 as shown in FIG.

DESCRIPTION OF SYMBOLS 11 Pull-out pin 12 Pin main-body part 13 Nut member 14 Cylindrical part 14a One end 14b Other end 15 Tapered part 16 Male thread part 17 One end 18 Female thread part 19 Step part 20 Cavity part 21 Other end 22 Step part 23 Cavity part 24 Step part 25 Gap part 26 Step part 27 Reduced diameter part 28 Through hole 29 Locking pin 30 Steel material 31 Bolt hole 32 Bolt 33 Nut

Claims (3)

A drawing pin that press-fits into a bolt hole provided in a member joint and corrects a positional deviation of the bolt hole,
The extraction pin is composed of a pin main body portion and a nut member that is detachably screwed to the pin main body portion.
The pin main body portion includes at least a cylindrical portion, a tapered portion that is connected to one end of the cylindrical portion and gradually decreases toward the distal end side, and a male screw portion that is connected to the tapered portion,
The said nut member is formed in required length, and is provided with the internal thread part screwed together with the said external thread part on the internal peripheral surface of one end side. The extraction pin characterized by the above-mentioned. The other end of the cylindrical part is continuously provided with a reduced diameter part through a step part,
The reduced diameter portion is formed with a through hole,
The extraction pin according to claim 1, wherein a locking pin is detachably locked in the through hole. A method for correcting misalignment of a bolt hole provided in a member joint using the extraction pin according to claim 1,
Inserting the male screw part of the pin main body part into the bolt hole,
By inserting one end of the nut member into the male screw portion and forcibly screwing the female screw portion, the pin main body portion is press-fitted into the bolt hole, and the bolt hole is misaligned. To fix
Further, the nut member is removed from the male screw part, the removed nut member is inverted,
The pin main body is moved from the bolt hole in the removing direction by inserting the other end of the nut member into the male screw and forcibly screwing the female screw. To correct misalignment of bolt holes.

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