JP2000192933A - Bolt installing structure and bolt installing member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rationalize bolt installing work in a narrow place. SOLUTION: A bolt 2 is inserted into a bolt hole 1b of a beam 1, an installing member 3 is inserted, and installing pieces 3a of the installing member 3 are made to enter between threads 2a to prevent separation of the bolt 2 from the bolt hole 1b. A head part 2b of the bolt 2 is urged to the upper flange 1a side of the beam 1 by making the installing pieces 3a forcedly enter between the threads 2a by fastening a nut 4 by interposing a washer 4a in the bolt 2. The installing member 3 has plural installing pieces 3a on the inner peripheral side, and the installing pieces 3a exhibit sufficient springiness by cutouts 3c.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for mounting bolts on predetermined members such as columns and beams in a building, and a mounting member.

[0002]

2. Description of the Related Art In steel-framed buildings, bolts are often used for joining columns and beams or joining beams. Recently, even in detached houses and apartment houses, the number of two-story or three-story buildings has been increasing, and when building these buildings, the work of joining the columns and beams on the upper floor to each other is difficult. Work is relatively high. It is general that the joining work at such a part is performed by arranging workers on the upper floor and the lower floor, respectively, and sequentially proceeding by these workers. However, in the above work, the number of workers and the work time increase, etc.
There is a problem that the cost required for the work increases significantly.

For this reason, a main body 51 and a mandrel as shown in FIG.
Bonding is performed using a fastener consisting of 52. That is, the beams overlap the holes formed in the members to be joined such as columns, and after inserting the main body 51 into these holes, the mandrel 52 is driven into the holes 51a of the main body 51, and the end portions 51b of the main body 51
Are joined by letting them open. When this fastener is used, the joining operation can be performed from one direction, and the number of workers can be reduced.

[0004] Bolts, nuts, and the like are also attached in advance to joints with other members such as columns and beams. In this case, the bolts can be inserted into holes formed in the columns and beams, and the nuts can be fastened to attach the bolts. However, in such a mounting method, when the nut is fastened again after the other members are joined, the bolt may rotate together. For this reason, bolts or nuts are attached to beams or columns by arc welding, stud welding, or the like.

[0005]

As described above, when a fastener is used to join a beam or a column, the cost of the fastener is high, and a loud noise is generated when the mandrel is driven into the main body. There is a problem that may cause trouble.

Further, when welding bolts to beams or columns to be attached, the man-hours required to weld all of the large number of bolts to be attached are extremely large, resulting in a problem that the cost is greatly increased, There is also a problem that the welding quality may change depending on the worker, and the member after welding must be subjected to rust prevention treatment, and this work is not easy.

On the other hand, in a building that is expected to be added in advance, a new frame is connected to a frame composed of columns, beams, etc. of an existing building. However, when this work is performed, an extremely narrow space surrounded by floors and walls is required. It is necessary to perform an operation of inserting a bolt into a vehicle, and this operation is not easy, and in many cases, the floor or wall must be largely broken. For this reason, there is a problem that a large amount of cost and construction time are required for the extension.

[0008] An object of the present invention is to provide a bolt mounting structure capable of mounting a bolt on a predetermined member such as a beam or a column, and preferably preventing co-rotation, and a mounting method used for this mounting structure. It is to provide a member.

[0009]

In order to solve the above-mentioned problems, a bolt mounting structure according to the present invention is a bolt mounting structure in which bolts are mounted in advance in bolt holes formed in predetermined members. A bolt is inserted through the bolt hole and a mounting member is inserted through the bolt, and a mounting piece having a spring property formed on the mounting member is brought into contact with a screw thread of the bolt to attach the bolt to the predetermined member. It is characterized by putting.

Further, the bolt mounting member according to the present invention is formed of a thin plate, and has a plurality of cantilevers having a length and a predetermined width on the inner peripheral side such that a tip thereof can contact a desired valley of the bolt. And a notch having a size larger than the diameter of a target bolt is formed between the mounting pieces.

In the above-described bolt mounting structure, the bolt is inserted into a bolt hole formed in a member to which the bolt is to be mounted, and the mounting member is inserted through the bolt, so that the mounting piece having spring properties provided on the mounting member is provided. The bolt enters the valley, and the vicinity of the tip of the mounting piece comes into contact with the thread in the direction in which the mounting member is inserted, and the tip contacts the thread or valley in the direction that has already passed. As a result, the bolt is prevented from coming off from the inserted bolt hole, and maintains the state of being attached to the target member. That is, bolts can be attached.

When the nut is tightened in a state where the mounting piece of the mounting member is in contact with the screw thread of the bolt, the mounting piece is located near the surface of the target member and near the surface. It enters between the threads on the outside. At this time, the vicinity of the tip of the mounting piece comes into contact with the screw thread on the surface side of the target member, and the tip touches the side face or the valley of the screw thread separated from the surface of the target member. For this reason, the bolt is urged in a direction separating the thread from the target member in accordance with the spring reaction force of the mounting piece, and the head of the bolt is pressed against the surface of the member.
Therefore, when screwing and fastening a nut to the bolt,
There is no so-called co-rotation in which the bolt rotates with the nut.

When the mounting piece formed on the mounting member gets over the screw thread, the mounting piece bends near the base. For this reason, when tightening the nut, it is necessary to form a deformation space between the female screw portion formed on the nut and the base of the mounting piece, in which the mounting piece can be deformed. In order to form a deformation space that can guarantee the bending of the mounting piece, chamfering corresponding to the deformation space is performed on the end of the female screw portion formed in the nut, or the deformation space is formed between the mounting member and the nut. A washer that can be formed may be interposed, or a disc spring that can form the deformation space may be interposed between the mounting member and the nut. In particular, by integrating the washer or the disc spring and the nut, handling can be facilitated.

In the above-mentioned mounting member, a plurality of mounting pieces are formed on the inner peripheral side of the thin plate, and since the mounting pieces have a predetermined width and a length enough to come into contact with the valleys of the bolts, the mounting member has The piece can enter between the screw threads of the bolt, thereby preventing the bolt from separating from the bolt hole and exerting a spring reaction force by contacting the side surface of the screw thread. Therefore, the bolt can be urged in the direction in which the head contacts the surface of the member by the spring reaction force of the mounting piece, and co-rotation can be prevented.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the bolt mounting structure and the mounting member will be described below with reference to the drawings. FIG. 1 is a diagram illustrating a bolt mounting structure. FIG.
FIG. 4 is a diagram illustrating a procedure for attaching a bolt. FIG. 3 is a diagram illustrating the configuration of the mounting member. FIG. 4 is a diagram for explaining a procedure for attaching a metal fitting constituting a floor to a bolt attached to a beam of a building, for example. FIG. 5 is a diagram illustrating an example of a site in a building where it is preferable to attach bolts in advance.

[0016] The bolt mounting structure according to the present invention is designed such that, when building structures or machines, or civil engineering structures such as bridges, for example, when connecting another frame to a frame by bolts, one of the frames is used. By attaching bolts to the frame, it is advantageous to use it in a part where safety can be ensured while improving workability.It is advantageous to attach bolts to the target frame and prevent the bolts from coming off, Even when a nut is screwed in joining another frame, co-rotation can be prevented.

In this embodiment, a case will be described in which the bolt mounting structure is applied to a steel-framed residential building. For example, in a steel-framed house, a three-story building has begun to spread, and when building such a building, the work of joining beams and columns on the upper floor is a high-altitude work. For this reason, by attaching bolts to predetermined members such as beams and columns in advance, it is possible to easily perform the work.

Demand is expected to be added or renovated in response to changes in the family structure or changes in the living environment. In this case, the beams and columns that make up the existing building correspond to the extension / remodeling section. It is necessary to connect new beams, columns or other members that have been made. In particular, as shown in FIGS. 5A to 5C, in the beam 1 surrounded by the outer wall panel 11, the panel 12 such as a floor panel or a roof panel, or the roof base material 13, a work space for inserting bolts. Is extremely narrow, and each panel 1
It is assumed that parts 1 and 12 will be partially demolished. But,
Even in such a portion, the work of joining a new beam or column can be easily advanced by attaching the bolt 2 in advance.

Prior to the description of the bolt mounting structure, the structure of the mounting member 3 will be described with reference to FIG.

The mounting member 3 is formed in the shape of a washer having a plurality of mounting pieces 3a having spring properties on the inner peripheral side, and the mounting pieces 3a are engaged with the threads 2a of the bolts 2 and once tightened. By urging the bolt 2, the bolt 2 is connected to the flange 1 a of the beam 1.
In addition to preventing the nut from coming off from the beam 1 by pressing to the side, co-rotation that may occur when the nut 4 is screwed into the bolt 2 again is prevented. Since the mounting piece 3a of the mounting member 3 is engaged with the screw thread 2a of the bolt 2 to prevent co-rotation, it is not always necessary to tighten the mounting member 3; By pressing against the side, it is possible to prevent the bolt 2 from separating from the beam 1 and to prevent co-rotation.

The mounting member 3 is made of a thin metal plate (stainless steel plate having a thickness of 0.2 mm in this embodiment) and is formed in a washer shape. The outer diameter of the mounting member 3 has a size corresponding to the screw specification of the bolt 2, and has a cutout hole 3 b having a diameter larger than the peak diameter of the bolt 2 on the center side. still,
The material of the mounting member 3 is not limited to the above example, and any material can be used as long as the formed mounting piece 3a can urge the bolt 2 with sufficient spring properties. Preferably, the material is difficult. The hole 3b is not necessarily a circular hole, but may be a polygonal hole.

Each of the mounting pieces 3 is located at a position where the hole 3b is equally divided into three.
a is formed. The mounting piece 3a is formed to project in a cantilever shape from the hole 3b toward the center side.
The tip (projecting end) of each of the mounting pieces 3a has such a size that it can contact the valley of the bolt 2.

The length of the mounting piece 3a only needs to be long enough to allow the tip to contact the target valley of the bolt 2. That is, the tip of the mounting piece 3a comes into contact with the valley of the bolt 2 or the tip comes into contact with the valley, causing bending, and the vicinity of the tip of the mounting piece 3a comes into contact with the screw thread 2a due to the bending. It is possible to urge the ridge and at the same time urge the tip of the mounting piece 3a into contact with the valley or the thread on the opposite side.
Therefore, it is possible to set the biasing direction for the bolt 2 depending on what part receives the reaction force of the bent mounting piece 3a.

However, the mounting piece 3a is not necessarily accurate.
It is not necessary for the tip of the mounting piece to be in contact with the valley of the bolt 2;
The tip of a may be in contact with the screw thread at a position separated from the valley of the bolt 2. Thus, even when the tip of the mounting piece 3a is separated from the valley of the bolt 2, the mounting piece 3a
Is indispensable between the screw threads 2a, and as long as the mounting piece 3a is positioned between the screw threads 2a, it is possible to prevent the bolt 2 from being detached from the bolt hole.

The mounting piece 3a comes into contact with the side surface of the screw thread 2a of the bolt 2 and urges the bolt 2 by being strongly tightened by the nut 4. For this reason, cuts 3c having a predetermined depth are formed on both sides of the mounting piece 3a so that the cuts 3c can be smoothly inserted into the bolts 2 to exhibit a spring property, and the cuts 3c have a sufficient protruding length. It is formed in a cantilever shape.

In this embodiment, the mounting member 3 is a bolt 2 of M12 coarse thread (pitch: 1.75, outer diameter: 12 mm, valley diameter: 10.1 mm). The hole 3b is 13mm in diameter, the width of the mounting piece 3a is 3mm, and the diameter of the wire connecting the tip is 8.
4 mm, the width of the cut 3c is 0.4 mm, and the depth is 2 mm (the free length of the mounting piece is 4 mm). In this mounting member 3, each mounting piece 3a penetrates between the screw threads 2a of the bolt 2 by an average of 1.8 mm and comes into contact with the valley, whereby a bending allowance of 0.8 mm occurs in each mounting piece 3a. As a result, it is possible to cause the bolt 2 to exert a force associated with the bending. Thus, it is preferable that the diameter of the line connecting the tips of the mounting pieces 3a is smaller than the root diameter of the screw.

By using the mounting member 3 formed as described above, it is possible to mount the bolt 2 in the bolt hole 1b formed in the upper flange 1a of the beam 1 made of H-section steel. When the mounted beam 1 is transported, the bolt 2 does not come off from the beam 1.

Next, the mounting structure of the bolt 2 to the beam 1 will be described with reference to FIGS. As shown in FIG. 2, a beam 1 serving as a predetermined member is formed with a bolt hole 1b for attaching a bolt 2. When attaching the bolt 2 to the beam 1, the bolt 2 is inserted from below into a bolt hole 1 b formed in the upper flange 1 a of the beam 1. Then
The mounting member 3 is mounted on the bolt 2 inserted into the bolt hole 1b.

The mounting member 3 is inserted into the mounting piece 3 a while passing over the screw thread 2 a of the bolt 2 and the upper flange 1 of the beam 1.
a. At this time, each mounting piece 3a is
Of the bolt 2a, thereby preventing the bolt 2 from detaching from the bolt hole 1b.

When the nut 4 is screwed into the bolt 2 in the above state, the mounting member 3 is held between the upper flange 1a of the beam 1, the nut 4, and the washer 4a as shown in FIGS. 1 (a) to 1 (c). As a result, some of the mounting pieces 3a are
a between the thread 2a approaching the flange 1a beyond the point a, the vicinity of the tip of the mounting piece 3a contacts the thread 2a of the bolt 2 on the side approaching the flange 1a, and the tip is separated from the flange 1a. Contact with the side surface or the valley of the thread 2a. At this time, the mounting member 3 is
, The spring reaction force exerted by the mounting piece 3a acts in a direction to separate the bolt 2 from the flange 1a,
Thereby, the head 2b of the bolt 2 is connected to the upper flange 1 of the beam 1.
It is urged to be pressed against the a side.

The thread 2a of the bolt 2 has an inclination angle (lead angle) corresponding to the lead. Therefore, the plurality of mounting pieces 3a formed on the mounting member 3 are all in the same
It does not penetrate between a and contact a screw thread or a valley. That is, when the mounting piece 3 a other than the above is tightened to the nut 4, the mounting piece 3 a comes into contact with the opposing thread of the bolt 2 in a state of being inclined according to the separation distance of the thread 2 a from the flange 1 a. Even in this case, it is possible to bias the head 2b of the bolt 2 toward the flange 1a by applying a spring reaction force exerted by the mounting piece 3a to the screw thread 2a.

In the bolt mounting structure as described above, the mounting member 3 is inserted into the bolt 2 inserted into the bolt hole 1b of the beam 1, and the mounting piece 3a of the mounting member 3 is inserted between the screw threads 2a. The detachment of the bolt 2 from the bolt hole 1b can be prevented by the mounting piece 3a.

Then, a washer 4a and a nut 4 are screwed and fastened to the bolt 2 inserted through the bolt hole 1b and the mounting member 3, so that the vicinity of the tip of the mounting piece 3a of the mounting member 3 is beamed by the nut 4. 1 can be brought into contact with the screw thread 2a closest to the upper flange 1a, and the tip can be brought into contact with the screw thread 2a adjacent to the screw thread 2a or the valley, whereby the head 2b of the bolt 2 can be connected to the upper flange. 1a can be urged to press against the back surface side.

Therefore, when the nut 4 once tightened is loosened, or when the nut 4 is detached and a member to be joined to the bolt 2 is attached and then the nut 4 is tightened again, the bolt 2 is prevented from rotating together. It becomes possible.

For example, when performing construction work, FIG.
As shown in (a), even if the bolt 2 is previously attached to the upper flange 1a of the beam 1 using the attachment member 3 and the nut 4 is loosened and removed from the bolt 2,
The bolt 2 is kept attached to the beam 1.

A predetermined metal fitting (for example, a joint of a floor panel (not shown) laid on the upper part of the beam 2) is attached to the bolt 2 attached to the beam 2 and filled with mortar to integrate the plurality of floor panels. Even after tightening the nut 4 again after mounting the rigid floor metal fitting 5 with the reinforcing steel bar, the so-called co-rotation in which the bolt 2 rotates together with the nut 4 is prevented, and the mounting work of the metal fitting 5 proceeds easily and smoothly. It is possible.

By applying the above-described bolt 2 mounting structure to each example shown in FIG. 5 in an existing building,
When extending or renovating an existing building, it is not necessary to partially break the outer wall panel 11, the floor panel, or the panel 12 such as a roof panel, so that the construction period is shortened and the cost is not increased.

[0038]

As described in detail above, in the bolt mounting structure according to the present invention, the bolt is formed on a predetermined member, for example, a beam or a column in a building, a member in a bridge, a frame of a machine, or the like. By inserting a mounting member having a mounting piece through the bolt inserted into the bolt hole and allowing the mounting piece of the mounting member to enter between the screw threads, the bolt can be prevented from being detached from the bolt hole.

Further, by fastening a nut to a bolt inserted through the bolt hole and the mounting member, the mounting piece of the mounting member is forcibly penetrated between the screw threads and brought into contact with the screw threads to thereby make the screw threads. , A force in a direction away from a predetermined member can be applied. For this reason, a pressing force against a predetermined member acts on the head of the bolt.
It is possible to prevent co-rotation that may occur when the nut is screwed into the bolt.

Further, in the mounting member according to the present invention, a thin metal plate is used as a material, and a plurality of mounting pieces having a spring property are formed on the inner peripheral side. Can easily get over the screw thread.
Therefore, it is possible to prevent the bolt inserted into the bolt hole from being detached and to prevent co-rotation when fastening the nut to the bolt.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a bolt mounting structure.

FIG. 2 is a diagram illustrating a procedure for attaching a bolt.

FIG. 3 is a diagram illustrating a configuration of a mounting member.

FIG. 4 is a diagram illustrating a procedure for attaching a metal fitting constituting a floor to a bolt attached to a beam of a building, for example.

FIG. 5 is a diagram illustrating an example of a site in a building where it is preferable to attach a bolt in advance.

FIG. 6 is a diagram illustrating a conventional fastener.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 beam 1a upper flange 1b bolt hole 2 bolt 2a screw thread 2b head 3 mounting member 3a mounting piece 3b hole 3c cut 4 nut 4a washer 5 metal fitting 11 outer wall panel 12 panel 13 roof base material

Claims (2)

[Claims] 1. A bolt mounting structure in which a bolt is previously mounted in a bolt hole formed in a predetermined member, wherein the bolt is inserted through the bolt hole and a mounting member is inserted through the bolt, and the bolt is inserted into the mounting member. A mounting structure for a bolt, wherein the formed mounting piece having spring property is brought into contact with a screw thread of the bolt, and the bolt is mounted on the predetermined member. 2. A plurality of cantilever-shaped mounting pieces, each of which is formed of a thin plate and has a length dimension and a predetermined width dimension such that a tip thereof can contact a valley of a target bolt on an inner peripheral side, A notch having a size larger than a diameter of a target bolt is formed between the mounting pieces.