JPH02180396A - Method for fixing pipe with holding metal fittings - Google Patents

Abstract

PURPOSE:To prevent a slippage in an axial direction and in a radial direction and separation, falling-off etc at a fixing portion and to obtain a fixing structure vibration resistance of which is improved by piercing a pipe fitting an elastic holding pipe through the fixing-up hole portion of holding metal fitting side and fixing them thereby. CONSTITUTION:Holding metal fittings 1 has a fitting hole 3 for an objective base and a fixing-up hole 2 for a pipe (P) which is provided at the flat plate portion thereof. A locking wall 5 is provided at the front end in an axial direction of the outer circumference of an elastic holding piece 4 made of section (C) shaped cylindrical piece one part of the inner circumferential wall of which is about flat face 4', and a locking claw wall 6 for snap-operation is projected at the rear end side thereof. A recess between the locking wall 5 and the locking claw wall 6 is formed as an engaging groove 7. The flat face 4' of the elastic holding piece 4 is fitted to be abutted to the flat portion (P1) of the pipe formed at one part of the circumferential wall, the pip (P) fitting the holding piece 4 is pierced in the fixing-up hole 2 portion and the pipe and the holding metal fittings 1 are fitted and fixed by fitting the engaging groove 7 portion at the circumferential end of the hole.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention generally relates to pipes with a diameter of 30 m installed as supply paths for oil and air in automobiles, various machines, devices, etc.
The present invention relates to a method of fixing a metal tube or resin tube (hereinafter simply referred to as piping) having a relatively small diameter of approximately 1/3 or less using a support fitting.

(Prior Art) Conventionally, as shown in Fig. 5, this type of fixing method has been used to assemble the support fitting (11) through the hole (12) with the pipe (Po) passing through the hole (12). , in the case of metal pipes, they are fixed to each other by welding (W) over the periphery of the hole, or
Alternatively, in the case of a resin tube, it was clamped and fixed to the wall of the clip (not shown).

(Problem to be solved by the invention) However, in such conventional fixing methods,
In the former case, hot solder welding by hand heating causes troublesome work, and often local overheating causes deterioration of mechanical strength on the pipe side near the solder welding, leading to cracks and breakage. After solder welding, plating treatment for corrosion resistance etc. is required, which has the problem of significantly hindering productivity, and in the latter case, due to poor clamping, there is often axial movement toward the piping side or circumferential direction causing the rotation of
In other words, under vibration conditions, there were problems such as detachment and falling off of the clip wall.

The present invention has been made in view of the above-mentioned problems of the prior art, and is based on a fixed f? In addition to reducing industrial complexity, there is no need to worry about deterioration of mechanical strength near the fixed part, and it is possible to use support fittings and piping that have been plated in advance, eliminating the need for these treatments after fixing. This improves productivity, exhibits vibration resistance at fixed parts, and prevents "sagging" on the piping side and peeling of surface treatment due to contact between the support fitting and the piping, even under vibration conditions. The purpose of the through-hole assembly is to propose a fixing method that prevents flexing and sautéing and eliminates concerns about the piping side separating or falling off due to the attachment in the hole.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention is designed to assemble piping penetrating through a plate-shaped support fitting having a section on the periphery of the hole. A cylindrical piece with a C-shaped cross section, in which a part of the peripheral wall is substantially flat, and an engaging groove is provided between the 1-series support wall and the latching claw wall protruding from the front and rear of the outer peripheral surface. An elastic holding piece is attached to a pipe having a flat surface formed in a part of a peripheral wall, and the elastic holding piece is installed by penetrating the hole and being engaged with the engaging groove. The gist of this method is a method of fixing piping with metal fittings, and furthermore, flat surfaces on a part of the inner peripheral wall of the holding piece are provided facing each other, and a flat surface is also provided on the peripheral wall of the piping corresponding to the flat surface. They are formed facing each other.

(Function) The present invention provides a method for assembling a pipe on which a holding piece is attached so that a substantially flat surface of a portion of the inner circumferential wall of the pipe is in contact with a flat surface of a portion of the circumferential wall of the pipe. In order to fix the hole, the assembly is performed by a rotation prevention effect due to mutual contact between the flat surface of the retaining piece that is attached to the peripheral edge of the hole and the flat surface on the pipe side, and by the rotation prevention effect caused by the mutual contact between the flat surface of the retaining piece that is attached to the periphery of the hole, and the rotation prevention effect between both ends of the retaining piece in the tube axis direction and the flat surface. Engagement with the stepped portions on both ends provides an axial movement-stopping effect, and an elastic holding piece is interposed between the outer peripheral surface of the piping and the periphery of the hole in the assembly, improving vibration resistance. A fixed structure can be easily obtained.

(Example) Hereinafter, embodiments of the present invention will be described based on the drawings. Fig. 1 is a plan view of a fixing part according to the method of fixing piping using a support fitting of the present invention, and Fig. 2 is a view of the holding part shown in Fig. 1. Single side view,
Fig. 3 is a partially cutaway sectional view taken along the line A-A in Fig. 1, and Fig. 4 is a view corresponding to Fig. 3 showing an embodiment of the pond, in which (1) is a plate-shaped support fitting; For installation with bolts, etc., to the mating base, the inner part of the clamp has a hole (3), or it consists of a bracket body, etc., and to assemble the piping (P) to the flat plate part, the hole (2) is passed through. There is. (4) is an elastic holding piece in which a part of the inner circumferential wall is approximately flat (4°) and is made of a metal spring material, resin material, rubber material, or a combination thereof, and has a C-shaped cross section. A 1-series support wall (5) is provided at the front end of the outer peripheral surface in the axial direction, and a locking pawl wall (6) is provided at the rear end side of the locking wall (6) for snap operation (see Fig. 3). 5)
A retaining wall protruding from the rear end (see Fig. 4) or branched from the rear end so that the elastic arm operates on the outer peripheral surface (see Fig. 4).
5) and a hook wall (6) may be formed. The recess between the 1st series support wall (5) and the latch claw wall (6) is an engagement groove (7).
It is formed as. Then, attach the elastic holding piece (4) so that its flat surface (4゛) is in contact with the flat surface (P1) of the pipe (P) formed in a part of the peripheral wall, and then attach the holding piece (4)
The pipe (P) equipped with the above-mentioned assembly passes through the hole (2), and the assembly is engaged with the peripheral edge of the hole (2) with the engagement groove (7), and fixed to each other. It forces you.

If desired, the flat surfaces (4°) of a part of the inner circumferential wall of the holding piece (4) are provided to face each other, while the flat surface (P1) of the peripheral wall of the pipe (P) is provided opposite to the flat surface (4°) (4') (see Figure 4), and each plane (4')
and the flat surface (P1) may be fixed by abutting each other.

Furthermore, the flat surface (P1) formed on the peripheral wall of the pipe (P)
If necessary, make the holding piece (4) slightly longer than the plane (4 degrees) (not shown) so that the position can be adjusted by moving the support fitting (1) in the axial direction as needed. Good too. In addition, the mounting of the support fitting (1) depends on the condition, and the mounting may be such that the hole (3) is perpendicular to the central axis of the pipe (P), or the support fitting (1) is twisted or bent. (1) can also be formed.

(Effects of the Invention) As explained above, in the method of fixing piping using a support fitting according to the present invention, the support fitting (1) forming the fixing part is assembled to the edge of the hole W1 of the hole (2), especially in the cross section C. Mutual abutment between the holding piece (4) in the shape of a letter and the flat surface (P1) formed on the peripheral wall of the pipe (P) on the plane (4゛) and the plane (
4) is fixed by the engagement of the step portions on both ends of the flat surface (P1) on both sides in the tube axis direction, so a fixing structure can be easily obtained by attaching the holding piece (4). , it is possible to simplify the fixing work and reduce the trouble, and at the same time there is no need to worry about deterioration of mechanical strength near the fixing part.
1) and piping (P) can be used, productivity can be improved by eliminating the need for the above-mentioned treatment after fixing, and reliable fixing makes it possible to use piping (P) l! There is no worry of “sagging” in the axial direction or circumferential direction I＼ in the axial direction or circumferential direction I＼, separation or falling off of the fixed part, and the engagement groove (7) by the elastic holding piece (4) is eliminated.
) This is an extremely useful method of fixing piping using support metal fittings, as it can prevent plating peeling and fretting at the fixing part by laying the bottom wall of the pipe and providing excellent vibration resistance.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a fixing part according to a method of fixing piping using a support fitting showing an embodiment of the present invention, Fig. 2 is a side view of the holding piece shown in Fig. 1, and Fig. 3 is Fig. 1A- A partially cutaway sectional view taken along line A; FIG. 4 is a view equivalent to FIG. 3 showing yet another embodiment;
FIG. 5 is a partially cutaway cross-sectional view of a fixing portion according to a conventional fixing method. (1)...Supporting metal fittings, (2)...Group 1 hole, (4
)...Holding piece, (4゛)...Flat surface, (5)...Latching support wall, (6)...Latching claw wall, (7)...Engagement groove, (
P)...Piping, (P+)...Flat plan Figure 2 Figure 4 Figure 5

Claims (2)

[Claims] (1) A plate-shaped support fitting (
At the hole periphery of the assembly hole (2) of the pipe (P) penetrated through 1), a part of the inner peripheral wall is substantially flat (4'), and a retaining support is provided at the front and rear of the outer peripheral surface, respectively. Wall (5) and hook wall (6)
) A cylindrical elastic holding piece (4) with a C-shaped cross section and an engagement groove (7) is attached to a part of the peripheral wall with a flat surface (
P_1) is attached to the piping (P) formed with the support metal fitting, and the elastic holding piece is passed through the assembly hole (2) and engaged with the engagement groove. Fixing method. (2) In claim 1, the flat surfaces (4') at a part of the inner peripheral wall of the holding piece (4) are provided to face each other, and the flat surfaces (4') are also provided on the peripheral wall of the pipe (P). ) A method for fixing piping using a support fitting, characterized in that flat surfaces (P_1) are formed facing each other in correspondence with the support fittings.