JPH10131921A - How to fix members - Google Patents

Abstract

(57) [Problem] To easily fix members without using bolts and nuts. SOLUTION: After drilling pilot holes 9 and 10 each having a slightly smaller diameter than the other in both members, a ring is formed at the tip of a shaft portion 5a that can be fitted into the other large diameter pilot hole. Groove 8
And a fixing pin 5 having a small-diameter portion 5c that can be press-fitted into the one small-diameter hole having the shaft portion 5a at the tip end of the annular groove 8 is pressed from the other member. Thereby, the inner peripheral portion of the prepared hole of the one member is shaved by the outer peripheral edge of the distal end portion of the shaft portion on the large-diameter side, and the shaving debris 11 formed integrally with the one member is generated by the annular concave groove 8. Let it flow inside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for fixing members such that at least two members such as plate members can be easily connected without using bolts or the like.

[0002]

2. Description of the Related Art Usually, two members such as plate members are fixed to each other as shown in FIGS. That is, the one shown in FIG.
In (1), a female screw hole (1a) is drilled, and the other
In (2), a slightly larger pilot hole (2) coaxial with the female screw hole (1a)
a) and a bolt (3) inserted from the other plate (2) side
Is screwed into the female screw hole (1a) of one of the plate members (1) to fix both plate members (1) and (2) together.

In FIG. 6, a long bolt (3) is inserted into a pilot hole formed in both plate members (1) and (2), and a nut (4) is screwed into a protruding end thereof. By doing, both plate materials (1)
(2) Each other is fixed.

[0004]

In the conventional fixing methods described above, since the bolts (3) are used in all cases, a female screw hole (1a) is formed in one plate (1) side, or a nut is formed. When a plurality of fixing portions are provided, such as when the tightening work according to (4) is required, the work efficiency is reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a method for fixing members which can be easily and firmly connected without using bolts.

[0006]

According to the present invention, an object of the present invention is to provide a fixing method for connecting at least two members, wherein each of the two members is provided with a pilot hole having one slightly smaller diameter than the other. After piercing, the end portion of the shaft portion that can be fitted into the other large-diameter pilot hole is provided with an annular groove, and the shaft portion at the distal end is smaller than the annular groove in the one lower-diameter hole. By inserting a fixing pin having a small diameter portion that can be press-fitted into the large diameter pilot hole of the other member and pressing it, the inner peripheral portion of the small diameter pilot hole of one member has the tip of the large diameter shaft portion. This problem is solved by shaving the outer peripheral edge of the portion and causing shaving debris that is formed integrally with the one member to flow into the annular groove.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a fixing pin (5) and upper and lower two plate members (6) and (7) fixed by the fixing pin (5).

The fixing pin (5) is made of, for example, carbon steel hardened by quenching, and has a large-diameter disc-shaped flange (5b) at the upper end of the shaft (5a) and an annular shape at the lower end. Recessed grooves (8) are respectively formed. The lower end portion of the shaft portion (5a) is a small-diameter portion (5c) slightly smaller in diameter than the upper portion.

In order to connect the plate members (6) and (7) using the fixing pins (5), the shaft portions (5a) can be fitted to the upper and lower plate members (6) and (7) without loosening. A large diameter pilot hole (9) and a pilot hole (10) slightly smaller in diameter than the pilot hole (9) into which the small diameter portion (5c) can be press-fitted are formed in advance.

[0010] Next, as shown in FIG.
Is inserted through the lower hole (9) of the upper plate (6), and the small diameter portion (5c) is inserted.
While pressing it into the lower hole (10) of the lower plate (7), and pressing it more strongly from above.

Then, the lower outer peripheral edge (5d) of the shaft portion (5a) comes into contact with the upper opening edge of the lower hole (10) of the lower plate (7), and the inner peripheral portion is forcibly shaved. As a result, the shaving waste (11) enters the annular groove (8).

When the fixing pin (5) is further pushed down to the lower limit, as shown in FIG. 3, the annular groove (8) is filled with shaving dust (11) integral with the plate (7), and
The vertical movement of (5) is restricted, so that the upper and lower plates (6)
(7) is fixed.

FIG. 4 shows another embodiment of the fixing pin (5). In this embodiment, the lower outer peripheral edge (5d) of the shaft portion (5a) is sharp and sharp. This facilitates shaving of the inner peripheral portion of the pilot hole (10), so that the pressing force of the fixing pin (5) can be reduced. In the above embodiment, the example in which the upper and lower members are joined has been described.
If (5a) is made long, it can be applied to the joining of more members.

[0014]

According to the present invention, the members can be easily and firmly connected to each other by simply pushing the fixing pin firmly without using bolts and nuts as in the prior art. The labor of forming or screwing the nut is omitted, and the fixing operation can be performed efficiently even when there are a plurality of fixing portions.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view showing a state before a fixing pin is inserted into both plate members according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional front view showing a state in which a fixing pin is pressed halfway and inserted.

FIG. 3 is a longitudinal sectional front view showing a state in which a fixing pin is pressed to a lower limit.

FIG. 4 is a partially cutaway front view showing another embodiment of the fixing pin.

FIG. 5 is a vertical sectional front view showing a conventional fixing method.

FIG. 6 is a vertical sectional front view showing another fixing method.

[Description of Signs] (5) Fixing Pin (5a) Shaft (5b) Collar (5c) Small Diameter (5d) Lower Peripheral Edge (6) (7) Plate (8) Annular Groove (9) (10) Prepared hole (11) Shaving waste

Claims (1)

[Claims] 1. A fixing method for joining at least two members, wherein a hole having a diameter slightly smaller than that of the other is formed in each of the members, and then a hole having a diameter of the other is formed. An annular groove is provided at the distal end of the shaft portion that can be fitted into the shaft, and the fixed pin having a small diameter portion that can be press-fit into the pilot hole having the one smaller diameter at the distal end than the annular groove, By inserting and pressing through the large-diameter hole of the member, the inner peripheral portion of the small-diameter lower hole of one member is shaved by the outer peripheral edge of the tip portion of the large-diameter shaft portion, and the one member generated thereby A method of fixing members, wherein shaving waste integrated with the member is caused to flow into the annular groove.