JP7036882B1 - Assembly jig and assembly method for nut holding structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an assembly jig and an assembly method having a nut holding structure capable of accurately positioning a holder with respect to a bolt hole.
SOLUTION: A bolt hole 7 having a diameter larger than that of a connecting bolt is formed in a furring strip 1. A nut 9 with a flange to be screwed into a connection bolt penetrating the bolt hole 7 is provided. A nut temporary fixing jig 16 capable of engaging the flanged nut 9 while engaging with the bolt hole 7 is provided. Temporarily fix the flanged nut 9 to the center position of the bolt hole 7 with the nut temporary fixing jig 16. A holder positioning jig 17 that can be engaged with the flanged nut 9 temporarily fixed while engaging the holder 8 is provided. The holder 8 is positioned by the holder positioning jig 17. The holder 8 is fixed to the furring strip 1. The holder 8 holds the flanged nut 9 so as to be movable in the direction of the member center axis of the furring strip 1 to form a nut holding structure.
[Selection diagram] FIG. 9

Description

Patent Law Article 30, Paragraph 2 Applicable Sales to Nittetsu Bussan System Building Co., Ltd. Shipped on July 22, 2nd year of Reiwa

The present invention relates to an assembly jig and an assembly method for assembling a nut holding structure for movably holding a nut screwed to a connecting bolt with a holder of a connected member.

Generally, the furring strip that supports the wall material of a building is a long member with a box-shaped cross section and is arranged so as to span two pillar materials, and both ends thereof are fixed to the pillar materials. It is bolted to. For bolting the furring strip and mounting bracket, a method of tightening bolts that penetrate both vertically with nuts is often adopted, and by setting the bolt holes larger than the bolts, the length of the furring strip can be accommodated. The installation error of the mounting brackets on both sides is absorbed.

However, if the furring strip is placed close to the top and bottom of the window frame, the window frame may interfere with the nut or bolt head, and the bolt may penetrate the furring strip and mounting bracket up and down. Cannot be tightened with nuts.

As a technique capable of solving this problem, Patent Document 1 provides an elongated hole 102 on the bottom surface of the end portion of the furring strip 101, welds a nut retainer 103 at this position to store the nut 104, and inserts a bolt 105 from below. A structure for inserting and fastening to a mounting plate (mounting bracket) 106 is disclosed.

By adopting the structure of Patent Document 1, it is possible to fasten the furring strip to the mounting bracket with bolts without penetrating the furring strip and the mounting bracket, and further, the bolt is moved along the elongated hole and the nut is used. By moving the nut along the holding tool (holder), it is possible to absorb the installation error of the mounting brackets on both sides of the furring strip.

Moreover, in the structure of Patent Document 1, the bolt hole is made a long hole and a holder having a size corresponding to the bolt hole is welded to set the movement range of the bolt and the nut sufficiently wide. On the other hand, even if the holder is slightly misaligned, the movement ranges of the bolts and nuts can be sufficiently overlapped.

Japanese Patent Publication No. 56-54140 (Claim for Utility Model Registration, Fig. 4)

However, in the structure of Patent Document 1, since a long hole is provided as a bolt hole and a holder having a size suitable for the bolt hole is welded, the movable amount of the bolt and the nut is large, and the body is positioned by the bolt and the bolt hole. Since the edge is not easily restricted by the position fluctuation, the installation error of the furring strip may increase.

On the other hand, it is conceivable to change the long bolt hole to a circular hole and weld a holder of a size suitable for it to reduce the movable amount of the bolt and nut. If the holder is misaligned with respect to the bolt hole due to the narrowing of the moving range, the overlap of the moving range of the bolt and nut becomes extremely narrow, and the bolt and nut are moved to move the mounting brackets on both sides of the furring strip. The installation error cannot be absorbed.

An object of the present invention is to provide an assembly jig and an assembly method having a nut holding structure capable of accurately positioning a holder with respect to a bolt hole.

In order to achieve the above object, in the assembly jig of the nut holding structure according to the present invention, a bolt hole having a diameter larger than that of the connection bolt is formed in the connected member and screwed into the connection bolt penetrating the bolt hole. The nut is a holder fixed to the connected member, and is used to assemble a nut holding structure that is held so that it can be moved in the radial direction of the bolt hole. It is equipped with a jig and a holder positioning jig that positions the holder at a position that allows the nut to move in the reference position, and further engages the nut while engaging the nut temporary fixing jig with the bolt hole. It enables the holder positioning jig to engage with the temporarily fastened nut while engaging the holder.

According to the above configuration, the nut is temporarily fastened to the nut temporary fixing jig engaged in the bolt hole, the nut is temporarily fixed at the reference position, and then the holder positioning jig is temporarily fixed while being engaged with the holder. By engaging with the nut, the holder can be positioned with respect to the bolt hole via the nut temporary fixing jig, the nut and the holder positioning jig. As a result, the holder can be accurately positioned at a position that allows the movement of the nut at the reference position by using the nut temporary fixing jig and the holder positioning jig.

Further, the holder can hold the nut so as to be movable in any of the front-back and left-right directions, but the nut may be held so as to be movable in the member central axis direction of the connected member.

According to this configuration, since the nut can be moved in the direction of the central axis of the member, it is possible to absorb the relative installation error of the support portions at both ends of the long member such as the furring strip.

Further, the nut is a nut with a flange having a flange at the lower part, and a leg piece having a gap for arranging the collar is formed in the holder and fastened to the connected member, and the collar is engaged with the holder at the peripheral portion. It may be fitted to hold the nut and guide the top of the nut to form a holding hole that limits the range of movement of the nut.

According to this configuration, the nut collar is engaged and held at the peripheral edge of the holding hole, so that the upper part of the nut can be exposed from the holding hole while guiding with the holding hole to limit the movement range of the nut. , The holder positioning jig can be easily engaged with the temporarily fixed nut.

Further, even if a fitting portion that can be fitted into the bolt hole is formed on the nut temporary fixing jig from the side opposite to the holder, and a male screw that can screw the nut is provided in this fitting portion. good.

According to this configuration, by fitting the fitting part of the nut temporary fixing jig into the bolt hole from the side opposite to the holder, the male screw can be projected to the side where the holder is fixed, and the nut is screwed into this male screw. In addition, the nut can be temporarily fixed in the correct position and firmly. Moreover, by screwing the nut into the male screw of the nut temporary fixing jig, the nut is temporarily fixed, and during the temporary fixing, the fitting portion is prevented from coming off from the bolt hole to temporarily fix the nut. The stop jig can be fixed.

Further, the holder positioning jig may be formed with a holding piece that can hold the holder and a fitting hole that can be fitted to the nut.

According to this configuration, since the holding piece and the fitting hole are formed in the holder positioning jig, the holder can be easily fitted by holding the holder with the holding piece and fitting the fitting hole into the temporarily fixed nut. Can be positioned. A large engagement hole is formed instead of the fitting hole, and the holder positioning jig is pushed and pulled to hook one edge of the engagement hole to the temporarily fixed nut to position the holder. You can also do it.

The present invention also provides an assembly method for assembling a nut holding structure using the above assembly jig.

That is, in the present invention, the nut temporary fixing jig is engaged with the bolt hole of the connected member, the nut is engaged with the nut temporary fixing jig, the nut is temporarily fixed at the reference position, and then the holder. While engaging the holder with the positioning jig, engage the holder positioning jig with the nut temporarily fixed to the nut temporary fixing jig, and position the holder at a position that allows the nut to move at the reference position. Further, the present invention provides a method for assembling a nut holding structure, which comprises fixing a holder to a connected member and then removing a nut temporary fixing jig and a holder positioning jig.

According to this configuration, the same effect as the effect of adopting the above-mentioned configuration of the assembly jig is obtained.

Further, the present invention is a furring strip provided with a nut holding structure at the end of the member, and the nut holding structure has a bolt hole having a diameter larger than that of a connecting bolt and a circular shape formed at the end of the member. A furring strip characterized by a structure in which a nut screwed into a connecting bolt penetrating a bolt hole is held so as to be movable in the radial direction of the bolt hole by a holder fixed to the end of the member. offer.

According to this configuration, since the bolt holes of the nut holding structure provided at the end of the furring strip are made circular, the movable amount of the bolts and nuts can be suppressed as compared with the case where the bolt holes are set to long holes. Can be done. Thereby, the position fluctuation due to the positioning of the furring strip by the bolt and the bolt hole can be further limited, and the installation error of the furring strip can be further reduced.

As described above, according to the present invention, the nut temporary fixing jig is engaged with both the bolt hole and the nut to temporarily fix the nut, and then the holder positioning jig is engaged with the holder and the nut to cause the bolt hole. The holder is positioned accurately with respect to the above.

As a result, it is possible to prevent the holder from being displaced and the overlap of the moving range of the bolt and the nut from becoming excessively narrow, and the movement of the bolt and the nut screwed to the bolt ensures an installation error of the connected member. Can be absorbed by. Further, since the overlap of the moving range of the bolt and the nut can be stabilized, the bolt hole and the holder are made relatively small to prevent the movable amount of the bolt and the nut from becoming excessively large, and the connected member. Installation error can be reduced.

Layout of the furring strip with a nut holding structure Perspective view of the end of the furring strip Horizontal cross-sectional view of the member end of the furring strip AA sectional view of FIG. 3 Holder perspective Perspective view of the nut Perspective view of nut temporary fixing jig Perspective view of holder positioning jig The figure which shows the assembly method of a nut holding structure. Sectional view showing a conventional nut holding structure

Hereinafter, a form for carrying out the assembly jig and the assembly method of the nut holding structure according to the present invention will be described with reference to the drawings.

As shown in FIGS. 1 to 4, the furring strip 1 is located close to the lower side of the window portion 3 among the furring strips that are bridged over the two pillars 2 of the building and support the wall material or the like. It is a long member made of steel and having a box-shaped cross section, and nut holding structures 4 are provided at both ends thereof. It will be concluded.

The nut holding structure 4 is formed by arranging two bolt holes 7 in the bottom wall at the end of the furring strip 1 in the width direction of the member, and a holder 8 covering these bolt holes 7 and two flanges screwed into the connection bolt 6. The attached nut 9 is held so as to be movable in the direction of the central axis of the member of the furring strip 1, and the connecting bolt 6 is inserted into each of the two bolt holes 7 from below the mounting bracket 5 to insert the attached nut 9 into the flanged nut 9. By screwing, the end portion of the furring strip 1 is bolted to the mounting bracket 5.

The bolt hole 7 has a larger diameter and a circular shape than the connection bolt 6, and is installed on both sides according to the length of the furring strip 1 by the gap between the outer peripheral surface of the connection bolt 6 and the inner edge of the bolt hole 7. Absorbs the installation error of the metal fitting 5.

As shown in FIG. 5, the holder 8 has both edges bent downward in the member axial direction of the furring strip 1 so as to provide a gap 10 between the holder 8 and the bottom surface inside the end portion of the furring strip 1. It is a U-shaped steel metal fitting forming 11a and 11b. The leg pieces 11a and 11b are brought into contact with the bottom surface inside the end portion of the furring strip 1, and the two points of the leg pieces 11a on the member end side are welded to the bottom surface inside the end portion of the furring strip 1. The holder 8 is fixed to the bottom surface inside the end portion of the furring strip 1 via the two welded portions 12.

Two rectangular holding holes 13 are formed in the holder 8 corresponding to the bolt holes 7 so as to project the upper portion of the flanged nut 9, and each holding hole 13 is a member of the furring strip 1 with the flanged nut 9. It is designed to guide in the direction of the central axis. The width of the holding hole 13 is set slightly wider than the distance between the opposite sides of the hexagon of the flanged nut 9 to regulate the rotation of the flanged nut 9, and the length is the hexagon of the flanged nut 9. The length of the diagonal line is set longer than that of the above, so that the flanged nut 9 can be moved in the direction of the member center axis of the furring strip 1, and the range of movement thereof is limited.

As shown in FIG. 6, the flanged nut 9 has a flange 14 at the lower portion, and the flange 14 is positioned in the gap 10 of the holder 8 and the upper portion is projected from the holding hole 13 to hold the flange 14 in the holding hole 13. By engaging with the peripheral portion of the furring strip 1, the holder 8 is movably held in the direction of the central axis of the member of the furring strip 1.

Next, the assembly jig 15 for assembling the nut holding structure 4 will be described.

The assembly jig 15 allows the temporary nut fixing jig 16 for temporarily fixing the nut 9 with a flange to the center of the bolt hole 7 as a reference position and the nut 9 with a flange located at the center of the bolt hole 7 to move. It is composed of a holder positioning jig 17 for positioning the holder 8 by aligning the center of the holding hole 13 with the center of the bolt hole 7.

As shown in FIG. 7, the nut temporary fixing jig 16 is a cylindrical jig having a diameter larger than that of the bolt hole 7, and is fitted in the center of one end thereof with a circular cross section that can be fitted into the bolt hole 7. A joint portion 18 is formed, and a male screw 19 capable of screwing a flanged nut 9 is projected from the center of the fitting portion 18. By fitting the fitting portion 18 into the bolt hole 7 from below the furring strip 1 on the opposite side of the holder 8, the male screw 19 aligns the center with the bolt hole 7 and the bottom of the end portion of the furring strip 1. It protrudes upward from the wall.

As shown in FIG. 8, in the holder positioning jig 17, the grip portion 21 extends from the rectangular positioning jig main body 20 to the center and the base end side, and the stacking plate 22 is stopped at the tip portion of the grip portion 21. It is a plate-shaped jig that is worn.

The positioning jig main body 20 and the stacking plate 22 of the holder positioning jig 17 are bent in the same direction at their tip edges to form holding pieces 23a and 23b, and the inner spacing thereof is set between the leg pieces 11a and 11b of the holder 8. The holder 8 is set to be substantially the same size as the outer space between the two, and the holder 8 is sandwiched from the upper surface side in the member axial direction of the furring strip 1.

The positioning jig main body 20 of the holder positioning jig 17 is formed with two fitting holes 24 having a rectangular shape with one side curved, and the fitting holes 24 are held while the holder 8 is sandwiched between the holding pieces 23a and 23b. Is fitted to the temporarily fixed flanged nut 9.

Next, an assembly method for assembling the nut holding structure 4 using the assembly jig 15 will be described.

First, as shown in FIG. 9A, two bolt holes 7 are formed side by side in the member width direction on the bottom wall at the end of the furring strip 1.

As shown in FIG. 9B, for one bolt hole 7, the fitting portion 18 of the nut temporary fixing jig 16 is fitted into the bolt hole 7 from below the furring strip 1, so that the bolt hole 7 and the center thereof. The male screw 19 is projected upward from the bottom wall at the end of the furring strip 1.

As shown in FIG. 9 (c), the nut 9 with a flange is screwed into the nut temporary fixing jig 16, and the nut temporary fixing jig 16 is temporarily fixed to the bolt hole 7, while the flanged nut 9 is bolted. Temporarily fix to the center of 7, and at that time, the opposite sides of the hexagon of the flanged nut 9 are directed parallel to the member center axis of the furring strip 1.

As shown in FIG. 9D, the flanged nut 9 is temporarily fixed to the other bolt hole 7 by the same procedure, and the flanged nut 9 is temporarily fixed to both of the two bolt holes 7 with the nut temporary fixing jig 16. Is temporarily fixed to the center of the bolt hole 7.

As shown in FIG. 9E, by covering the holder 8 at the position where the flanged nut 9 is temporarily fixed, the flange 14 at the lower part of the flanged nut 9 is positioned in the gap 10 of the holder 8 and the holding hole 13 is formed. It engages with the peripheral edge portion and projects the upper part of the flanged nut 9 from the holding hole 13.

As shown in FIG. 9 (f), by holding the grip portion 21 of the holder positioning jig 17 and covering the holder 8 with the positioning jig main body 20 from above, the holder 8 is sandwiched between the holding pieces 23a and 23b. The fitting hole 24 is fitted into the temporarily fixed flanged nut 9. As a result, the center of the holding hole 13 of the holder 8 coincides with the center of the bolt hole 7, and the holder 8 releases the temporary fixing via the flanged nut 9, the nut temporary fixing jig 16 and the holder positioning jig 17. It is positioned to allow the movement of the flanged nut 9 after the jigging.

Further, with the leg pieces 11a and 11b of the holder 8 in contact with the bottom surface inside the end portion of the furring strip 1, two places of the leg pieces 11a on the member end side of the furring strip 1 are welded to form the holder. 8 is fixed to the furring strip 1, and then the nut temporary fixing jig 16 and the holder positioning jig 17 are removed to complete the assembly of the nut holding structure 4 (see FIGS. 2 to 4).

According to the above configuration, a bolt hole 7 is formed in the bottom wall at the end of the furring strip 1, and a nut 9 with a flange is held by a holder 8 covering the bolt hole 7 to form a nut holding structure 4. The furring strip 1 can be bolted to the mounting bracket 5 with the connecting bolt 6 without penetrating the edge 1. As a result, it is possible to prevent the connecting bolt 6 and the flanged nut 9 from interfering with the window portion 3 even for the furring strip 1 arranged close to the lower side of the window portion 3.

Further, since the bolt hole 7 is set to have a larger diameter than the connecting bolt 6 and the flanged nut 9 is movably held by the holder 8, the connecting bolt 6 is moved inside the bolt hole 7 and the holder 8 is held. By moving the flanged nut 9 along the holding hole 13, it is possible to absorb the installation error of the mounting bracket 5 that bolts both ends of the furring strip 1.

Further, by assembling the nut holding structure 4 using the assembly jig 15, it is possible to prevent the holder 8 from being displaced with respect to the bolt hole 7, and the moving ranges of the connecting bolt 6 and the flanged nut 9 are matched. The connecting bolt 6 and the flanged nut 9 can be moved within the set range. As a result, the installation error of the mounting bracket 5 can be sufficiently absorbed without making the bolt hole 7 and the holder 8 excessively large, and the installation error of the furring strip 1 due to the misalignment of the connection bolt 6 and the flanged nut 9 can be obtained. Can be made smaller.

The present invention is not limited to the above embodiment, and modifications can be made as appropriate within the scope of the present invention. For example, not only the flanged nut 9 is movably held by the holder 8 in the direction of the member center axis of the furring strip 1, but also the flanged nut 9 is movably held in the direction orthogonal to the member center axis of the furring strip 1. You may do so. Further, not only the flange 14 at the lower part of the nut 9 with a flange is engaged with the peripheral edge of the holding hole 13 of the holder 8 to hold the nut, but also a holder for accommodating and holding the entire nut is provided on the inner surface of the holder. The range of movement of the nut may be limited while guiding.

Further, the nut temporary fixing jig 16 may be any as long as it can engage the flanged nut 9 while engaging with the bolt hole 7, and does not necessarily have to form the fitting portion 18 and the male screw 19. do not have. Further, the holder positioning jig 17 may be any as long as it can engage with the flanged nut 9 while engaging the holder 8, and does not necessarily have to form the holding pieces 23a and 23b and the fitting hole 24. There is no.

1 Furnace 2 Pillar material 3 Window part 4 Nut holding structure 5 Mounting bracket 6 Connection bolt 7 Bolt hole 8 Holder 9 Flanged nut 10 Gap 11a, 11b Leg piece 12 Welding part 13 Holding hole 14 Flange 15 Assembly jig 16 Nut temporary Stop jig 17 Holder positioning jig 18 Fitting part 19 Male screw 20 Positioning jig body 21 Grip part 22 Laminating plate 23a, 23b Holding piece 24 Fitting hole

Claims (6)

A bolt hole having a diameter larger than that of the connecting bolt is formed in the connected member, and the nut screwed into the connecting bolt penetrating the bolt hole moves in the radial direction of the bolt hole with the holder fixed to the connected member. An assembly jig for assembling a nut holding structure with a structure that can be held.
The nut temporary fixing jig includes a nut temporary fixing jig for temporarily fixing the nut to a reference position and a holder positioning jig for positioning the holder at a position allowing the movement of the nut at the reference position. The nut holding structure is characterized in that the nut can be engaged while engaging with the bolt hole, and the holder positioning jig can be engaged with the temporarily fixed nut while engaging with the holder. Assembly jig. The assembly jig having a nut holding structure according to claim 1, wherein the holder holds the nut so as to be movable in the member central axis direction of the connected member. The nut is a nut with a flange having a flange at the bottom.
The holder is formed with a leg piece that provides a gap for arranging the collar, and is fastened to the connected member. The collar is engaged with the peripheral edge portion to hold the nut, and the upper part of the nut is guided to the nut. The assembly jig having a nut holding structure according to claim 1 or 2, wherein a holding hole is formed to limit the range of movement of the nut holding structure. The nut temporary fixing jig is characterized in that a fitting portion capable of fitting into a bolt hole is formed from the side opposite to the holder, and a male screw capable of screwing a nut is projected from the fitting portion. The assembly jig of the nut holding structure according to claim 1, 2 or 3. The nut holding structure according to any one of claims 1 to 4, wherein the holder positioning jig is formed with a holding piece capable of holding the holder and a fitting hole that can be fitted to the nut. Assembly jig. An assembly method for assembling a nut holding structure using the assembly jig according to claim 1.
Engage the nut temporary fixing jig with the bolt hole of the connected member, engage the nut with the nut temporary fixing jig, temporarily fix the nut to the reference position, and then attach the holder to the holder positioning jig. While engaging, engage the holder positioning jig with the nut temporarily fixed to the nut temporary fixing jig, position the holder at the position that allows the movement of the nut at the reference position, and further connect the holder. A method for assembling a nut holding structure, which comprises removing a nut temporary fixing jig and a holder positioning jig after fixing to a member.

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