JP2011106228A - Anchor bolt fixing tool and fixing method of anchor bolt - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To fix all anchor bolts of the foundation of a structure to an anchor plate, with improved workability in fixation of the anchor bolts, while accurately performing height adjustment thereof. <P>SOLUTION: The anchor bolt fixing tool 1 includes a cylindrical section 10 having a holding portion 21 provided at a lower end portion to hold a nut C fitted to an anchor bolt B, into which the anchor bolt B can be inserted from the lower end portion; and a bar-like section 11 having a laser light receiver 30 for receiving laser light for height adjustment attached to an upper portion, the lower portion of which is inserted into the cylindrical section 10 so as to be vertically movable. The cylindrical section 10 includes a handle 23 for rotating the cylindrical section 10. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention uses an anchor bolt fixing jig for fixing an anchor bolt with a nut and an anchor bolt fixing jig to an anchor plate temporarily installed on a foundation formwork at the time of constructing a building foundation. The present invention relates to an anchor bolt fixing method.

 When constructing a building such as a house, an anchor bolt for fixing an upper structure such as a column or reinforcing the fixing is installed on a concrete foundation. The anchor bolt is installed in a shape protruding a predetermined length from the inside of the foundation and above the foundation.

  The anchor bolt is usually fixed to the anchor plate by temporarily placing an anchor plate on the upper part of the foundation mold before the concrete foundation is placed. Specifically, by inserting an anchor bolt into the through hole of the anchor plate, screwing in and fitting the nuts up and down across the anchor plate of the anchor bolt, and tightening those nuts from both sides of the anchor plate, Anchor bolts are fixed to the anchor plate. The anchor plate is removed leaving the anchor bolts after the concrete foundation is cast.

  By the way, if the anchor bolt protrudes too much from the top of the foundation, the length of the portion buried in the foundation concrete will be shortened, and the anchor bolt's adhesion length to the concrete will not be secured, so the upper part of the pillar etc. The bonding strength between the structure and the foundation is weakened. Conversely, if the length of the part embedded in the concrete is made longer than necessary and the protruding part of the anchor bolt from the top of the foundation is made too short, the nut used to fix the upper structure on the foundation The length of the portion to be fitted is shortened, and the engaging margin of the nut with respect to the anchor bolt is not secured, so that the fixing strength between the upper structure and the foundation cannot be secured sufficiently. Therefore, when the anchor bolt is fixed to the anchor plate, the height of the anchor bolt is adjusted to make the protruding length appropriate.

  Conventionally, the height adjustment and fixing of the anchor bolt has been performed by confirming and adjusting the height of the anchor bolt with a level or the like, and then tightening the nut with a wrench. In this case, it is necessary to change tools during work, and it is necessary to carry these tools when fixing the anchor bolts sequentially. For this reason, work required time and effort, and workability was not good.

  On the other hand, the socket which rotates the nut of an anchor bolt is disclosed as a jig | tool which fixes an anchor bolt (refer patent document 1). This socket has a fitting portion into which a nut is fitted, a cylinder portion having an accommodation space for accommodating an anchor bolt, and a regulating member for regulating the length of the anchor bolt accommodated in the accommodation space of the cylinder portion. ing. According to this socket, the height of the restricting member in the cylinder portion is fixed in accordance with the reference anchor bolt fixed to the anchor plate, and the height of the other anchor bolt can be adjusted based on the height of the restricting member. For this reason, there is no need to carry a level for each anchor bolt fixed.

JP 2005-248469 A JP 2004-360411 A Japanese Utility Model Publication No. 64-33853

  However, when the socket is used, the heights of the other anchor bolts are adjusted to the height of the reference anchor bolt with respect to the anchor plate. For this reason, when the height of the anchor plate varies depending on the location, the height of the anchor bolt relative to the foundation, that is, the protruding length varies. Normally, a large number of anchor plates are used for the entire foundation of a building, and they are overlapped and connected to each other (see Patent Documents 2 and 3), and the height of the foundation form of the anchor plate varies, In general, the height of the anchor plate varies depending on the location. Therefore, in the socket, it is difficult to fix all the anchor bolts on the foundation of the building to the anchor plate while accurately adjusting the height with respect to the foundation.

  The present invention has been made in view of such a point, and improves the workability of anchor bolt fixing, and also anchor plates while accurately adjusting the height of all anchor bolts of the foundation of the building with respect to the foundation. It is an object of the present invention to provide an anchor bolt fixing jig and an anchor bolt fixing method that can be fixed to the anchor bolt.

  In order to achieve the above object, the present invention is a jig for fixing an anchor bolt with a nut to an anchor plate on a foundation form that is temporarily installed during construction of a building foundation, and is fitted into the anchor bolt. A holding part for holding the nut is provided at the lower end part, and a cylindrical part into which the anchor bolt can be inserted from the lower end part and a laser receiver for receiving laser light for height adjustment are attached to the upper part. A rod-shaped portion whose lower portion is inserted in the tubular portion so as to be movable up and down, and the tubular portion is provided with a handle for rotating the tubular portion. This is a bolt fixing jig.

  According to the present invention, since the height can be adjusted for each anchor bolt using the laser receiver, all the anchor bolts of the foundation of the building can be fixed to the anchor plate while accurately adjusting the height with respect to the foundation. In addition, a single anchor bolt fixing jig can be used to adjust and fix a series of anchor bolts, so there is no need to change tools or carry multiple tools, greatly improving workability. it can.

  The tubular portion may be provided with a means for preventing the rod-shaped portion from coming off. In such a case, for example, the rod-shaped portion does not come off from the cylindrical portion during work, and workability can be improved.

  The anchor bolt fixing jig may be configured such that the rod-shaped portion does not pass through the holding portion of the cylindrical portion. In such a case, it is possible to prevent the rod-like portion from being detached from the holding portion side of the tubular portion, and workability can be improved.

  The cylindrical portion may be provided with a window for visually observing a contact portion between the anchor bolt and the rod-shaped portion inside. In such a case, since it can be visually confirmed that, for example, foreign matter is caught in the contact portion between the anchor bolt and the rod-shaped portion, the height of the anchor bolt can be adjusted accurately and reliably.

  Another aspect of the present invention is an anchor bolt fixing method using the anchor bolt fixing jig described above, wherein the anchor bolt is inserted into the through hole of the anchor plate, and the nut is placed on the top and bottom of the anchor bolt sandwiching the anchor plate. And fitting the tubular portion on the anchor bolt on the anchor plate so that the upper side of the anchor plate of the anchor bolt is inserted into the tubular portion, and by the holding portion of the tubular portion Holding the upper nut and placing the rod-shaped portion on the upper end of the anchor bolt; rotating and moving the anchor bolt up and down to move the rod-shaped portion up and down; and receiving the laser beam on the rod-shaped portion A step of setting the anchor bolt to a predetermined height using a container, and rotating a nut below the anchor bolt to Tightening the lower surface of the rate, turning the handle of the cylindrical portion, rotating the upper nut by the holding portion of the cylindrical portion, and tightening the upper nut to the upper surface of the anchor plate, It is what you have.

  According to the present invention, since the height is adjusted for each anchor bolt using the laser receiver, all the anchor bolts of the foundation of the building can be fixed to the anchor plate while accurately adjusting the height with respect to the foundation. In addition, since a series of height adjustment and fixing of the anchor bolt is performed using one anchor bolt fixing jig, it is not necessary to change tools or carry a plurality of tools, and the workability can be greatly improved.

  ADVANTAGE OF THE INVENTION According to this invention, the workability | operativity of anchor bolt fixation is improved, and also all the anchor bolts of the foundation of a building can be fixed to an anchor plate, adjusting height with respect to a foundation correctly.

It is a side view which shows the outline of a structure of the jig | tool for anchor bolt fixing concerning this Embodiment. It is sectional drawing which shows the outline of a structure of the jig | tool for anchor bolt fixation. It is a bottom view of the holding part of the cylindrical part of the jig for anchor bolt fixation. It is explanatory drawing which shows the state of the main processes of the fixing method of an anchor bolt. FIG. 5 is an explanatory diagram showing a state of main steps following FIG. 4 of the anchor bolt fixing method. It is sectional drawing which shows the outline of a structure of the jig | tool for anchor bolt fixation provided with the removal prevention means of a rod-shaped part.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. 1 and 2 are explanatory views showing an outline of the configuration of the anchor bolt fixing jig 1 according to the present embodiment.

  The anchor bolt fixing jig 1 is for fixing the anchor bolt B with a nut to an anchor plate A temporarily provided on a foundation formwork when a foundation of a building is constructed. For example, the anchor bolt fixing jig 1 has, for example, a cylindrical portion 10 and a rod-shaped portion 11 inserted into the cylindrical portion 10. The cylindrical portion 10 and the rod-shaped portion 11 are made of metal, for example.

  For example, the cylindrical portion 10 is formed in a rectangular parallelepiped shape, and the inside is hollow in the longitudinal direction (vertical direction) as shown in FIG. 2, and a through hole 20 penetrating the cylindrical portion 10 is formed. Yes. A holding portion 21 that holds a nut fitted into the anchor bolt B is formed at the lower end portion of the tubular portion 10. For example, as shown in FIG. 3, the holding portion 21 has a fitting hole 21 a having a shape matching the outer shape of the side surface of the nut, and can fit the nut and hold the nut. As shown in FIGS. 1 and 2, the cylindrical portion 10 can insert the anchor bolt B into the through hole 20 from the lower end portion where the holding portion 21 is located. The lower end surface of the cylindrical portion 10 is formed flat and can be in close contact with the upper surface of the anchor plate A.

  As shown in FIG. 1, a window 22 is opened on the side wall of the cylindrical portion 10. Through this window 22, the contact portion between the rod-shaped portion 11 and the anchor bolt B can be visually observed.

  A handle 23 extending in the horizontal direction is attached to the side wall surface of the tubular portion 10. With the handle 23, the cylindrical portion 10 can be rotated around the vertical axis.

  The rod-shaped part 11 is formed in a cylindrical shape that can be inserted into the through hole 20 of the cylindrical part 10, for example. The diameter of the rod-shaped part 11 is set larger than the diameter of the fitting hole 21 a so that it can move up and down in the through hole 20 and does not pass through the fitting hole 21 a of the holding part 21. The lower portion of the rod-shaped portion 11 is inserted into the tubular portion 10 from the upper portion of the tubular portion 10, and the upper portion of the rod-shaped portion 11 protrudes above the tubular portion 10. A laser receiver 30 that receives a laser beam for height adjustment is attached to the upper portion of the rod-shaped portion 11. The laser receiver 30 is attached to the rod-shaped part 11 by a clamp 31, for example. The laser receiver 30 can detect laser light of a predetermined height emitted from a laser emitter E installed separately at a construction site, and can notify the presence or absence of the detection by displaying or sounding. Therefore, the rod-shaped portion 11 can be adjusted to a predetermined height by moving the rod-shaped portion 11 up and down and causing the laser receiver 30 to detect the laser light from the laser emitter 30.

  Next, a method of fixing the anchor bolt B using the anchor bolt fixing jig 1 configured as described above will be described.

  At the time of fixing the anchor bolt B, as shown in FIG. 4, the anchor plate A is temporarily installed on the foundation form G before the concrete of the foundation F of the building is placed. The anchor plate A has a hole A1 into which the anchor bolt B is inserted. A large number of anchor plates A are installed in the basic formwork G of the building, and a plurality of holes A1 are formed in each anchor plate A. Further, a laser emitter E is installed at the construction site, and the laser light emitted horizontally is set to a predetermined height for adjusting the height of the anchor bolt B.

  First, as shown in FIG. 4 (a), the anchor bolt B is inserted into the hole A1 of the anchor plate A, and the nuts C and D are screwed into the upper and lower sides of the anchor plate B with the anchor plate A interposed therebetween. At this time, due to the weight of the anchor bolt B, the upper nut C on the upper side is hooked on the upper surface of the anchor plate A, and the anchor bolt B is suspended from the anchor plate A. 4 and 5, H1 indicates the height of the upper end (top end) of the concrete foundation F to be placed later, and H2 indicates the protruding length of the anchor bolt B with respect to the top end of the foundation F. The target height of the upper end of the anchor bolt B to be determined is shown.

  Next, the anchor bolt fixing jig 1 is put on the anchor bolt B on the anchor plate A as shown in FIG. At this time, the upper part of the anchor bolt B is inserted into the cylindrical part 10 from below the cylindrical part 10. The lower end surface of the cylindrical portion 10 is in close contact with the upper surface of the anchor plate A, the cylindrical portion 10 stands vertically on the anchor plate A, and the upper nut C is fitted and held in the holding portion 21 of the cylindrical portion 10. Is done. Further, the rod-like portion 11 is placed on the upper end of the anchor bolt B. At this time, it is confirmed from the window 22 of the cylindrical portion 10 whether foreign matter is caught between the anchor bolt B and the rod-shaped portion 11.

  Next, as shown in FIG. 4 (c), when the anchor bolt B is rotated, the anchor bolt B moves upward (or downward) with respect to the anchor plate A, and accordingly, the rod-shaped portion 11 moves upward (or Down). When laser light of a predetermined height emitted from the laser emitter E is detected by the laser receiver 30 of the rod-shaped portion 11, the anchor bolt B stops rotating at that position, and the height of the upper end of the anchor bolt B is increased. Is adjusted to H2. Thereby, the height (projection length) with respect to the foundation F of the anchor bolt B is adjusted.

  Next, as shown in FIG. 5A, when the lower nut D on the lower side of the anchor bolt B is rotated, the nut D is fastened to the lower surface of the anchor plate A. Next, as shown in FIG. 5B, the tubular portion 10 is rotated by the handle 23, the upper nut C is rotated by the holding portion 21, and the upper nut C is fastened to the upper surface of the anchor plate A. Thereby, the anchor bolt B is fixed to the anchor plate A. Thereafter, the anchor bolt fixing jig 1 is removed from the anchor bolt B as shown in FIG. The other anchor bolts B are similarly fixed to the anchor plate A of the basic formwork G. Thereafter, the concrete of the foundation F is placed in the foundation mold G.

  According to the above embodiment, since the height of each anchor bolt B can be adjusted using the laser receiver 30, the height of all the anchor bolts B of the foundation F of the building is accurately adjusted with respect to the foundation F. However, it can be fixed to the anchor plate A. Further, since a series of height adjustment and fixing of the anchor bolt B can be performed by using one anchor bolt fixing jig 1, there is no need to change tools or carry a plurality of tools during work, and workability is improved. Can be improved dramatically.

  The anchor bolt fixing jig 1 is configured such that the rod-like portion 11 cannot pass through the holding portion 21 of the cylindrical portion 10, so that the rod-like portion 11 comes off from the holding portion 21 side (lower side) of the cylindrical portion 10. Can be prevented, and workability can be improved.

  Since the cylindrical portion 10 is formed with a window 22 for visually observing the contact portion between the anchor bolt B and the rod-shaped portion 11, for example, foreign matters are caught in the contact portion between the anchor bolt B and the rod-shaped portion 11. Can be confirmed visually. Therefore, the height adjustment of the anchor bolt B can be performed accurately and reliably.

  Further, by fixing the anchor bolts B by the fixing method as described in the present embodiment, the height of all the anchor bolts B of the building foundation F can be accurately adjusted with respect to the foundation F. In addition, since it is not necessary to change tools or carry multiple tools during work, workability can be dramatically improved.

  The cylindrical portion 10 described in the above embodiment may be provided with a means for preventing the rod-shaped portion 11 from coming off. In such a case, for example, as shown in FIG. 6, an opening 50 that is long in the vertical direction is formed in the side wall of the tubular portion 10, and the side surface of the rod-shaped portion 11 protrudes to the outside of the tubular portion 10 through the opening 50 A member 60 is attached. When the rod-like portion 11 moves upward, the protruding member 60 hits the upper end of the opening 50 and the rod-like portion 11 cannot move any further. Therefore, it can prevent that the rod-shaped part 11 comes off from the cylindrical part 10. FIG. Thereby, for example, the rod-shaped portion 11 is not detached from the tubular portion 10 during work, and workability is improved. In this example, when the handle 23 is turned, the rod-shaped portion 11 is also rotated together with the tubular portion 10. In this example, the opening 50 and the protruding member 60 constitute a drop prevention means.

  Note that the protruding member 60 may be a screw fitted in a screw hole formed in the side wall of the rod-like portion 11. In such a case, since the protruding member 60 can be removed from the rod-shaped portion 11, the rod-shaped portion 11 can be detached from the tubular portion 10 as necessary.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to such examples. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the idea described in the claims, and these naturally belong to the technical scope of the present invention. It is understood.

DESCRIPTION OF SYMBOLS 1 Anchor bolt fixing jig | tool 10 Cylindrical part 11 Rod-shaped part 20 Through-hole 21 Holding part 21a Fitting hole 22 Window 23 Handle 30 Laser receiver 31 Clamp A Anchor plate A1 hole B Anchor bolt C Upper nut D Lower nut E Laser Light emitter F Foundation G Foundation formwork H1 Upper end of foundation H2 Target height of upper end of anchor bolt

Claims (5)

A jig for fixing an anchor bolt with a nut to an anchor plate on a foundation formwork that is temporarily installed during construction of a building foundation,
A holding portion for holding a nut fitted into the anchor bolt is provided at the lower end, and a cylindrical portion capable of inserting the anchor bolt into the inside from the lower end,
A laser receiver for receiving a laser beam for height adjustment is attached to the upper part, and the lower part has a rod-like part inserted in the cylindrical part so as to be movable up and down,
An anchor bolt fixing jig, wherein the cylindrical portion is provided with a handle for rotating the cylindrical portion.   The anchor bolt fixing jig according to claim 1, wherein the tubular portion is provided with a means for preventing the rod-shaped portion from coming off.   The anchor bolt fixing jig according to claim 1 or 2, wherein the rod-shaped portion is configured not to pass through the holding portion of the cylindrical portion.   The anchor bolt fixing jig according to any one of claims 1 to 3, wherein the cylindrical portion is provided with a window for visually observing a contact portion between the anchor bolt and the rod-shaped portion inside. An anchor bolt fixing method using the anchor bolt fixing jig according to any one of claims 1 to 4,
Inserting anchor bolts into the through holes of the anchor plate and fitting nuts on the upper and lower sides of the anchor plate of the anchor bolt; and
Cover the anchor bolt on the anchor plate so that the upper side of the anchor bolt from the anchor plate is inserted into the cylindrical portion, and hold the upper nut by the holding portion of the cylindrical portion. And placing the rod-shaped part on the upper end of the anchor bolt;
Rotating and moving the anchor bolt up and down to vertically move the rod-shaped portion, and setting the anchor bolt to a predetermined height using the laser receiver of the rod-shaped portion;
Rotating the nut below the anchor bolt and tightening it to the lower surface of the anchor plate;
A method of fixing an anchor bolt, the method comprising: rotating a handle of the cylindrical portion, rotating the upper nut by a holding portion of the cylindrical portion, and tightening the upper nut to an upper surface of the anchor plate.

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