JPH0861345A - Joint bolt for member in framework of construction in which cap is applied on screw part and joint of member in framework of construction using this joint bolt - Google Patents

Abstract

PURPOSE: To improve the joint of each member in the framework of the construction. CONSTITUTION: As for a bolt consisting of a scerw part 3, cylinder part 4 other than the screw part, and a head part 5, the joint of each member of the skelton of the construction is carried out by using a bolt whose outside diameter of the screw part 3 is made smaller than the outside diameter of a cylinder part 4 other than the screw part and a cap which is constituted so that the outside diameter is made equal to the cylinder part 4 other than the screw part 3 and the top end is tapered and the cap is put on the screw part of the bolt. In the insertion of the bolt into each member in the reinforcement of a connection, coupling, etc., or in the joint of the member by using a variety of metalware in the frame work in the framework constructicn, the work can be carried out smoothly without damaging the threads of the bolt. Further, since the diameter of a dowel hole for driving the bolt and the outsider diameter of the bolt are equal, the trouble in strength due to the squeak, application of load for a long period, and the inadvertent application of load due to disaster, etc., is reduced. Further, when the bolt is demounted, the bolt can be demounted easily without damaging not only the threads but the joint member, since the screw part is covered by the cap.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bolt used for joining members in a building frame such as a joint and a joint, and a method for joining members in a building frame using the bolt.

[0002]

2. Description of the Related Art Conventionally, reinforcement for joining members in frames such as joints and joints of Japanese-style wooden construction, stilts, pillar pedestals, belts, corners, and tilts in skeletons of frame construction method Use hexagon nuts of ordinary hexagon bolts to join members such as clasps, pullers, joists, beams, and lintels, as shown in Fig. 7. The tip of the drift pin was tapered and the knurl was used around the center of the shaft.

[0003]

When conventional members such as hexagonal bolts and hexagonal nuts are used for reinforcement when joining members of joints and joints as in the conventional case, in order to protect the threads of the bolts, It was necessary to make the dowel hole for driving the bolt in the member larger than the outer diameter of the bolt.

Further, in the case of joining members using various metal fittings in the framework of the frame construction method, the bending of the metal fitting shifts the dowel hole of the wood to be joined with the bolt driving hole of the metal fitting. The hole needed to be larger than the outer diameter of the bolt.

Further, when joining steel materials together, it is necessary to enlarge the bolt driving hole due to the bending of the steel materials.

When the bolts and nuts are used as described above, the dowel hole needs to be larger than the outer diameter of the bolt.
After joining the members, there were structural problems such as the members being squeezed together and the strength being inferior.

Therefore, by making the dowel hole for driving the bolt the same as or smaller than the outer diameter of the bolt, the clearance between the dowel hole for driving the bolt and the bolt is eliminated, and the crease and strength after joining are improved. I started to use drift pins like 7.

However, when the drift pin is used,
Once the drift pin is driven in, it is difficult to remove the drift pin even when it is desired to remove the joined members.

Further, even if the drift pin can be removed, not only the drift pin but also other members are often damaged, and it is difficult to reuse each member as it is.

On the other hand, the joints of the respective members are not maintained by tightening them from both ends like bolts and nuts, but the joints of the respective members are maintained by the knurls on the shaft. Also, the drift pin may easily come off due to an unexpected load due to a disaster such as a windstorm or an earthquake, which may cause a problem in maintaining the joint between the members.

Further, since each member is supported only by knurls, there is a problem in strength when it is used for joining using various metal objects such as a shaft assembly method.

Furthermore, when joining steel materials, each member cannot be fixed.

[0013]

The present invention solves the above-mentioned problems by the following means.

A bolt used for joining members in a building frame including a joint and a joint is a bolt having a screw portion and a cylindrical portion other than the screw portion, and the outer diameter of the screw portion is other than the screw portion. A bolt having a smaller outer diameter than that of the cylindrical portion has the same outer diameter as that of the cylindrical portion other than the threaded portion, and a cap having a tapered tip is covered on the threaded portion of the bolt.

A bolt used for joining members in a building frame including a joint and a joint is a bolt having a screw portion and a cylindrical portion other than the screw portion, and the outer diameter of the screw portion is other than the screw portion. A bolt having a smaller outer diameter than that of the cylindrical portion has the same outer diameter as that of the cylindrical portion other than the threaded portion, and a cap having a tapered tip is put on the threaded portion of the bolt.

The fitting portion between the bolt and the cap was screwed.

A detent for detachment is provided on the outer periphery of the cap to which the fitting portion between the bolt and the cap is screwed.

[0018]

Operation: By covering the threaded portion of the bolt with the cap, the thread of the bolt is not damaged.

By tapering the tip of the cap, it can be smoothly inserted into a bolt driving dowel hole having a diameter similar to the outer diameter of the bolt.

Since the cap and the bolt are screwed to each other, the cap does not come off easily while the bolt is inserted into the tap hole. Therefore, the screw thread can be prevented from being damaged, and can be smoothly inserted into the dowel hole.

By attaching a detent to the cap,
After inserting the bolt into the dowel hole, the cap can be easily removed from the bolt.

[0021]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view when the cap of the bolt according to the present invention is mounted. FIG. 2 is a perspective view when the cap of the bolt according to the present invention is detached, and a perspective view in which a part of the cap that covers the bolt is shown in cross section. Figure 1,
In 2, the tapered portion of the cap has a conical shape,
If the taper portion shown in FIG. 3 is used, the bolt can be easily removed when removing the bolt that has been driven once.

FIG. 3 is a perspective view of a bolt cap according to the present invention provided with a detent for detachment. In this figure, the detent is provided on the tapered portion, but it may be provided on the cylindrical portion.

4 and 5 are perspective views of examples of use of the bolt according to the present invention when joining members using a joist bracket. FIG. 4 shows a state before inserting the bolt, and FIG. 5 shows a time when the nut is fitted to the bolt without the cap.

FIG. 6 shows a state before the bolt is inserted when the bolt according to the present invention is used as a plug for inserting a large tilt and short hook.

[0026]

By covering the threaded portion of the bolt with the cap, the thread of the bolt is not damaged.

By tapering the tip of the cap, it can be smoothly inserted into a bolt driving dowel hole having a diameter similar to the outer diameter of the bolt.

Since the cap and the bolt are screwed together, the cap does not come off easily while the bolt is inserted into the dowel hole. Therefore, the screw thread can be prevented from being damaged and can be smoothly inserted into the dowel hole.

By attaching a detent to the cap,
After inserting the bolt into the dowel hole, the cap can be easily removed from the bolt.

From the above, the present invention is used for reinforcing joints, joints, etc., and when joining members using various metal parts in the framework of the shaft construction method when the bolts are inserted into the members. You can work smoothly without damaging the threads.

Further, since the diameter of the dowel hole for driving the bolt and the outer diameter of the bolt are not different from each other, after the insertion, after the insertion, squeaks and long-term weight,
There are few strength problems due to unexpected weighting due to disasters.

Further, when the bolt is removed, since the screw portion is covered with the cap, the bolt can be easily removed without damaging not only the screw thread but also the joining member.

[Brief description of drawings]

FIG. 1 is a perspective view when a cap of a bolt according to the present invention is attached.

FIG. 2 is a perspective view of the bolt according to the present invention when the cap is removed, and a perspective view in which a part of the cap that covers the bolt is shown in section.

FIG. 3 is a perspective view of a bolt cap according to the present invention provided with a detent for detachment.

FIG. 4 is a perspective view of a use example of the bolt according to the present invention when joining members using a joist receiving member.

FIG. 5 is a perspective view of a use example of the bolt according to the present invention when joining members using a joist receiving member.

FIG. 6 is a perspective view when the bolt according to the present invention is used as an insertion plug for a tilted large-insertion short hollow.

FIG. 7 is a perspective view showing a conventionally used drift pin.

[Explanation of symbols]

 1 Cap 2 Bolt 3 Threaded part 4 Cylindrical part other than threaded part 5 Head part 6 Detachment detent 7 Bolt driving dowel hole 8 joist bracket

Claims (4)

[Claims] 1. A bolt comprising a screw portion, a cylindrical portion other than the screw portion, and a head, wherein the outer diameter of the screw portion is smaller than the outer diameter of the cylindrical portion other than the screw portion, and the screw portion of the bolt. A method of joining members in a framework of a building using a cap that has an outer diameter equal to that of a cylindrical portion other than a screw portion and has a tapered tip. 2. A bolt comprising a screw portion, a cylindrical portion other than the screw portion, and a head, wherein the outer diameter of the screw portion is smaller than the outer diameter of the cylindrical portion other than the screw portion, and the outer diameter is other than the screw portion. Bolts for joining members in a building framework in which the cap of which is the same as the cylindrical part of 3. A bolt comprising a screw portion, a cylindrical portion other than the screw portion, and a head, wherein the outer diameter of the screw portion is smaller than the outer diameter of the cylindrical portion other than the screw portion. Which is the same as the cylindrical part of the above, and is a cap for a bolt for joining a member in a building frame structure in which a cap having a tapered tip is covered on the threaded part of the bolt, and the fitting part with the bolt is screwed 4. A bolt comprising a threaded portion, a cylindrical portion other than the threaded portion, and a head, wherein the outer diameter of the threaded portion is smaller than the outer diameter of the cylindrical portion other than the threaded portion. Which is the same as the cylindrical part of the above, and is a cap for a bolt for joining a member in a building frame structure in which a cap having a tapered tip is covered on the threaded part of the bolt, and the fitting part with the bolt is screwed Cap with detent for removal on the outer circumference