JPH0540607U - Square pipe fastening auxiliary member - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a square pipe fastening auxiliary member that improves the workability of fastening a square pipe to a mating member and improves the reliability of the fastening result. [Structure] A square pipe fastening auxiliary member main body 10 having an outer shape of a cylinder is provided, and a front end outer periphery thereof is configured to be press-fitted into one round hole 3 of the square pipe 1, and the center of the front end face thereof is provided. Is formed with a circular hole 11 having a diameter slightly larger than the diameter of the head of the bolt 5, and at the center of the bottom of the circular hole 11 is a circular hole 12 for guiding the screw portion of the bolt 5. The square pipe fastening assisting member is characterized in that the bulging portion 12 press-fitted into the other round hole 4 of the square pipe 1 is formed at the center of the rear end face thereof.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a square pipe fastening auxiliary member, and more particularly to a square pipe fastening auxiliary member that improves the workability of fastening a square pipe to a mating member and improves the reliability of the fastening result.

[0002]

[Prior Art]

 A conventional example of a method of fastening a square pipe to a mating member will be described with reference to FIGS. 1 and 2. Reference numeral 1 is a square pipe, and 2 is a mating member to which the square pipe 1 is fastened. Reference numeral 5 is a bolt and 6 is a nut, by which the square pipe 1 is fastened to the mating member 2. For this fastening, a square hole 3 with a diameter slightly larger than the diameter of the head of the bolt 5 and a hole 4 with a diameter slightly larger than the diameter of the threaded portion 5'of the bolt 5 are drilled in the square pipe 1. The mating member 2 is also provided with a round hole 7 having a diameter slightly larger than the diameter of the threaded portion 5'of the bolt 5.

[0003]

[Problems to be solved by the device]

 In the conventional example as described above, in order to fasten the square pipe 1 to the mating member 2, first, the mating member 2 and the square pipe 1 are arranged so that the round hole 4 of the mating member 2 faces the round hole 7 of the mating member 2. Positioning and holding this state, put the nut 6 on the rear side of the round hole 7 of the mating member 2, insert the bolt 5 through the round hole 3, and screw this into the nut 6. The conclusion is completed by

However, in this case, since the square pipe 1 is provided with two round holes 3 and 4, the bolt 5 is inserted from the round hole 3 of the square pipe 1 so that the tip thereof is located at the rear side. It is not easy to find the round hole 4. While doing so, the bolt 5 may be dropped in the square pipe 1, which makes it difficult to take out. Since the fastening point is inside the square pipe 1, it takes time to confirm the fastening.

Regarding the fastening strength of this conventional example, a total of two plates, that is, the rear plate that constitutes the square pipe 1 and the plate that constitutes the mating member 2 are fastened with bolts and nuts 5 and 6. However, there was a problem in strength especially in the vicinity of the round hole 4 of the square pipe 1. The present invention is intended to provide a square pipe fastening assisting member that solves the problems described above.

[0006]

[Means for Solving the Problems]

 The square pipe fastening auxiliary member main body 10 having an outer shape of a cylinder is provided, and the outer periphery of the front end portion of the square pipe 1 is press-fitted into one round hole 3 of the square pipe 1. A circular hole 11 having a diameter slightly larger than the diameter of the head of the bolt is bored, and a circular hole 12 for guiding the screw portion 5'of the bolt 5 is bored at the center of the bottom of the circular hole 11 of the bore. The square pipe fastening assisting member is characterized in that the bulging portion 12 that is press-fitted into the other round hole 4 of the square pipe 1 is formed at the center of the rear end face thereof.

[0007]

【Example】

 An embodiment of this invention will be described with reference to FIGS. Reference numeral 10 denotes a square pipe fastening auxiliary member body of the present invention. This square pipe fastening assisting member main body 10 has a cylindrical outer shape, the outer periphery of the front end thereof is press-fitted into the round hole 3 of the square pipe 1, and a bulging portion 12 is formed at the center of its rear end face. The part is configured to be press-fitted into the round hole 4 of the square pipe 1. The outer shape of the bulging portion 12 has a circular cross section. A circular hole 11 having a diameter slightly larger than the diameter of the head of the bolt 5 is formed at the center of the front end face of the main body 10 of the auxiliary member for fastening the rectangular pipe, and the center of the bottom of the circular hole 11 is provided at the center. Is provided with a circular hole 12 having a circular cross section for guiding the screw portion 5'of the bolt 5. After all, the circular hole 11 and the circular hole 12 penetrate the rectangular pipe fastening assisting member body 10 in the longitudinal direction thereof. This square pipe fastening auxiliary member body 10 is fixed to the square pipe 1 with its front end outer periphery pressed into the round hole 3 of the square pipe 1 and the bulging portion 12 pressed into the round hole 4 of the square pipe 1. .

In order to fasten the square pipe 1 to which the square pipe fastening assisting member as described above is fixed to the mating member 2, first, the round hole 4 of the square pipe 1 is opposed to the round hole 7 of the mating member 2. The mating member 2 and the square pipe 1 are positioned and held in this state, the nut 6 is applied to the rear side of the round hole 7 of the mating member 2, and then the cross-sectional circular hole 11 of the fastening assisting member main body 10 is placed. The bolt 5 is inserted through the screw 5, and the screw 5'is screwed into the nut 6 while being guided by the circular hole 12 in the cross section of the fastening assisting member main body 10 to complete the fastening.

[0009]

[Effect of the device]

 As described above, the square pipe fastening assisting member of the present invention includes the square pipe fastening assisting member main body 10 having a cylindrical outer shape, and the outer periphery of the front end portion of the square pipe fastening assisting member is formed in one round hole 3 of the square pipe 1. It has a structure of being press-fitted, and a circular hole 11 having a diameter slightly larger than the diameter of the head of the bolt 5 is formed at the center of the front end surface thereof. 5 is provided with a circular hole 12 having a cross section for guiding the screw portion 5 ', and a bulging portion 12 which is press-fitted into the other round hole 4 of the square pipe 1 is formed at the center of the rear end face thereof. Therefore, it is not necessary to guide the threaded portion 5'of the bolt 5 by the circular hole 12 in cross section so as to hit the round hole 4 first. Since the circular hole 11 and the circular hole 12 penetrate the rectangular pipe fastening auxiliary member main body 10 in the length direction, there is no room for the bolt 5 to drop into the rectangular pipe 1. Further, since the fastening location is near the front end face of the fastening assisting member main body 10, it is easy to confirm the fastening. Further, the square pipe fastening auxiliary member main body 10 has its front end outer periphery press-fitted into the round hole 3 of the square pipe 1 and its bulging portion 12 press fit into the round hole 4 of the square pipe 1 so that the two are firmly integrated with each other. Since the round pipe 4 of the square pipe 1 is pressed and protected by the fastening assisting member when the bolts and nuts are fastened, the entire plate forming the square pipe 1 is also the rear side of the square pipe 1. The strength of the fastening is increased by participating in the fastening between the plate and the plate constituting the mating member 2.

[Brief description of drawings]

FIG. 1 is a perspective view of a conventional example of fastening a square pipe.

FIG. 2 is a sectional view of a conventional example of fastening a square pipe.

FIG. 3 is a view showing a cross section of a square pipe fastening according to the present invention.

FIG. 4 is a view showing a square pipe fastening assisting member of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Square pipe 3 One round hole 4 The other round hole 5 Bolt 5'Screw part 10 Square pipe fastening auxiliary member main body 11 Cross section circular hole 12 Swelling part

Claims (1)

[Scope of utility model registration request] 1. A square pipe fastening auxiliary member main body having a cylindrical outer shape, the front end outer periphery of which is press-fitted into one round hole of the square pipe, and the center of the front end face is A circular hole with a diameter slightly larger than the diameter of the head of the bolt is drilled, and a circular hole for guiding the screw part of the bolt is drilled at the center of the bottom of this circular hole. A square pipe fastening assisting member, characterized in that a bulged portion that is press-fitted into the other round hole of the square pipe is formed at the center of the square pipe.