JPH068808U - Coach bolt - Google Patents

Abstract

(57) [Summary] [Purpose] The screw tightening head does not protrude from the tip of the triangular screw part for general machinery so that the screw tightening work can be performed in the minimum space, and post-processing after tightening is performed. (EN) Provided is a coach bolt which can be performed easily and at low cost. [Structure] A wood screw portion 23 is provided in one half of the bolt shaft 22 and a general machine triangular screw portion 24 is provided in the other half of the bolt shaft 22.
A square bolt tightening hole 25 is recessed at the end of the bolt shaft 22 at the end of No. 4.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a coach bolt, and more particularly to a coach bolt used in a wooden panel type prefabricated house.

[0002]

[Prior art]

 As shown in FIG. 3, as a conventional coach bolt 1, a wood screw portion 5 is provided from the intermediate portion 3 of the bolt shaft 2 to one end portion 4, and from the intermediate portion 3 of the bolt shaft 2 to the other end portion. Is known, and the hexagonal head 6 is provided at the tip of the general-purpose triangular screw portion 7.

Such a coach bolt 1 has a bolt end on one outer side of a member when a wooden member is to be fastened by inserting a through bolt into the through hole when joining the wooden members together in a house construction or the like. In some cases, the coach bolt 1 is used when it is difficult to adopt such a through bolt.

An example of a usage state of such a coach bolt 1 is shown in FIG.

The floor panel 9 on the second floor is placed on the wall panel 8 on the first floor side made of wood, and the wall panel 10 on the second floor is erected on the floor panel 9 on the second floor. The wall panel 8 on the first floor and the wall panel 10 on the second floor are connected by the coach bolt 1.

Specifically, the wood screw portion 5 of the coach bolt 1 is screwed onto the upper surface of the wall panel 8 on the first floor, the floor panel 9 is placed on the wall panel 8, and the barrel 11 is attached to the outside thereof. In the state in which the triangular screw portion 7 for general machinery of the coach bolt 1 is projected from the floor surface of the floor panel 9, the wall panel 10 on the second floor having the through hole 12 on the lower surface is inserted into the through hole 12. The coach bolt 1 is erected on the floor panel 9 by penetrating the triangular screw portion 7 for a general machine.

Then, the nut 14 is screwed into the triangular screw portion 7 for general machine of the coach bolt 1 through the operation hole 13 formed on the side surface near the through hole 12 of the wall panel 10 on the second floor, and the nut is screwed using the wrench 15 or the like. By tightening 14, the wall panel 8 on the first floor and the wall panel 10 on the second floor are connected.

[0008]

[Problems to be solved by the device]

 In the conventional coach bolt 1 described above, the hexagonal head 6 projects from the tip of the triangular screw portion 7 for general machinery, so that the through hole 12 of the wall panel 10 on the second floor is penetrated. In this state, the amount of protrusion into the wall panel 10 on the second floor increases by the height of the hexagonal head 6, and if the tightening operation with the wrench 15 is attempted in this state, the operation of the wall panel 10 by the protrusion of the hexagonal head 6 is performed. If the hole 13 is not enlarged, the wrench 15 cannot be attached. If the operation hole 13 of the wall panel 10 is set large, the operation hole 13 must be closed when finishing the inner wall finishing of the wall panel 10. However, there has been a problem that the closing work takes time and labor, which is contrary to the shortening of the construction period.

In addition, a skirting board is generally used to close the operation hole 13, but when the operation hole 13 becomes large, the skirting board has to be made large, which increases the cost and design. However, there was a problem that it was not preferable.

The present invention has been made in view of the above conventional problems, and an object of the present invention is to perform a screw tightening operation without the head for screw tightening protruding from the tip of the triangular screw part for general machinery. (EN) It is possible to provide a coach bolt that can be carried out in a minimum space and can be post-processed after tightening easily and at low cost.

[0011]

[Means for Solving the Problems]

 To achieve the above object, the present invention provides a coach bolt having a wood screw portion on one half of the bolt shaft and a triangular screw portion for general machinery on the other half of the bolt shaft. It is characterized in that a square bolt fastening hole is recessed at the end of the bolt shaft at the end of the triangular screw portion for general machinery.

[0012]

[Action]

 When screwing the wood screw part of the coach bolt into the target wood member, tighten it with the square bolt fastening hole, and let the other target wood member penetrate the triangular screw part for general machinery, and project from the other target wood member. Attach the nut to the triangular screw part for general machinery to connect and fix the wooden members.

In this case, since the head for tightening does not protrude from the tip of the triangular screw portion for general machinery, the space for tightening the nut is minimal, and the hole for tightening work is formed in the target wood member. In that case, the hole can be made smaller and post-processing after tightening work becomes easier.

[0014]

【Example】

 Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings.

1 and 2 are views showing an embodiment of the present invention.

The coach bolt 21 of the present embodiment includes a wood screw portion 23, a general machine triangular screw portion 24, and a bolt tightening hole 25.

The wood screw portion 23 is formed as a screw thread having a pitch and a height that are larger than the intermediate portion 26 that divides the bolt shaft 22 into two halves on one side, and can be directly screwed into the target wood member. ing.

The triangular screw portion 24 for a general machine is formed as a screw thread having a small pitch and a small height in an approximately half range on the opposite side of the intermediate portion 26 that divides the bolt shaft 22 into two parts, and a nut or the like can be screwed. There is.

The bolt tightening hole 25 is recessed in the bolt shaft end of the end of the general machine triangular screw portion 24, and is formed so that the inner shape is hexagonal. This bolt tightening hole 25 is for inserting and rotating a hexagon wrench (not shown) when the wood screw portion 23 is screwed into the target wood member, so that the outer peripheral bolt shaft 22 is not cracked when rotating with the hexagon wrench. Therefore, it is desirable to secure a sufficient thickness of the outer circumference.

Next, a case where the coach bolt 21 is used for connecting wall panels on the first floor and the second floor as shown in FIG. 2 will be described.

In the figure, reference numeral 27 is a wall panel on the first floor, and a floor panel 28 and a barrel 29 on the outer periphery of the floor panel 28 are installed on the wall panel 27 on the first floor, and on the floor panel 28 and the barrel 29. The wall panel 30 on the second floor is erected.

The wood screw portion 23 of the coach bolt 21 is vertically screwed into the core member 31 that constitutes the upper surface of the wall panel 27 on the first floor. In this case, the wood screw portion 23 is screwed in by inserting a hexagon wrench into the bolt tightening hole 25 and rotating it.

Further, the triangular screw portion 24 for general machinery of the coach bolt 21 penetrates a through hole 33 formed in a core material 32 that constitutes the lower surface of the wall panel 30 of the second floor, and the upper end thereof is of the second floor. It is in a state of protruding into the wall panel 30.

Then, a nut 35 is screwed into the triangular screw portion 24 for a general machine projecting into the wall panel 30 on the second floor, and the nut 35 is tightened with a wrench 34 or the like. 27 and 30 will be connected. In this case, the operation of inserting the nut 35 and the tightening operation of the wrench 34 are performed through the operation hole 36 formed on the lower side surface of the wall panel 30 on the second floor, but the operation is generally performed to project into the wall panel 30 on the second floor. Since there is no head for bolt tightening at the upper end of the machine triangular screw portion 24, the amount of protrusion of the coach bolt 21 into the second floor wall panel 30 is small, and as a result, the operation hole 36 is not formed large. However, the wrench 34 can be easily inserted.

Therefore, by making the operation hole 36 small, the work of closing the operation hole 36 can be facilitated, and the skirting board for closing the operation hole 36 can be made small to achieve a low cost and improve the design. Is possible.

The present invention is not limited to the above-mentioned embodiment, and various modifications can be made within the scope of the present invention.

For example, in the above embodiment, the bolt tightening hole 25 is formed as a hexagon, but the bolt tightening hole 25 is not limited to this example, and may be a triangle, a quadrangle, a pentagon or a heptagon or more. Various shapes can be adopted as long as the rotational force can be transmitted.

Further, in the above embodiment, the case where the coach bolt is used to connect the wall panels on the first floor and the second floor has been described, but the invention is not limited to this. It can also be applied to the connection of various parts such as connecting the wall panels at the corners.

[0029]

[Effect of device]

 As described above, according to the present invention, since the square bolt fastening hole is formed in the bolt shaft end at the end of the triangular screw portion for general machinery, the bolt shaft end at the triangular screw portion for general machinery is formed. Since the head for bolt tightening does not project, the bolt tightening space can be minimized and bolt tightening can be performed. It is possible to minimize the above, to facilitate post-processing for closing the operation hole, and to reduce the cost.

[Brief description of drawings]

FIG. 1 is a perspective view of a coach bolt according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view showing a connected state of wall panels on the first floor and the second floor showing the usage state of FIG.

FIG. 3 is a perspective view of a conventional coach bolt.

FIG. 4 is a partial cross-sectional view showing a connected state of the first and second floor wall panels using a conventional coach bolt.

[Explanation of symbols]

 21 Coach Bolt 22 Bolt Shaft 23 Wood Screw Part 24 Triangular Screw Part for General Machine 25 Bolt Fastening Hole

Claims (1)

[Scope of utility model registration request] 1. A coach bolt in which a wood screw portion is provided on one half of the bolt shaft, and a triangular screw portion for a general machine is provided on an opposite half of the bolt shaft, wherein an end of the triangular screw portion for a general machine is provided. Coach bolt characterized in that a square bolt tightening hole is provided at the bolt shaft end.