JPS5868587A - Structure of detachment preventive fitting of fluid pipe joint section - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a detachment prevention fitting for a fluid pipe joint consisting of a receptacle and an insertion port, and in particular, to a fitting for preventing detachment of a fluid pipe joint, and particularly for the relationship between an entity in which the fitting is incorporated and a suppressor that presses the entity. Concerning improvement of joint structure.

In recent years, as a detachment prevention fitting for fluid pipe joints, an object with an inclined surface on the upper part has been incorporated into the press ring, and the object can be pressed from the outside in the direction of the pipe with a bolt or other pressing tool, and the object can be placed at the bottom of the object. A type without cutting the cutting edge into the surface of the insertion part
9213, Japanese Utility Model Publication No. 55-3i338, etc.) In these conventional devices, the inclined surface that the actual suppressor comes into contact with is straight, but at a relatively steep angle. (Usually set at around 15 degrees).

This is an angle obtained from a relationship that provides a force to prevent digging when the insertion part separates from the receptacle, and no consideration is given to the initial digging force when setting the entity. Therefore, in the case of an object with a steep slope, the bottom of the object and the surface of the socket will easily slide when installing the detachment prevention fitting, and the object will not fit fully into the socket. It cannot be locked. For this reason, when the receptacle part is removed from the receptacle part, the bottom of the wedge body and the surface of the receptacle part slide, resulting in a drawback that a predetermined detachment preventing force cannot be exerted.

The present invention solves the above-mentioned drawbacks by adopting a new structure for the abutment structure between the body and the pressing tool, and the detachment prevention fitting for the fluid pipe joint of the present invention has the following structure. This is a requirement.

■An entity that is fitted into the joint of a fluid pipe consisting of a socket and an insertion port and has a bottom that engages with the surface of the insertion port, a pressing tool that suppresses the entity from the outside diameter direction of the tube, and a core. It is a detachment prevention fitting consisting of a push ring that accommodates a cutting body and a pressing tool and engages with a socket; ■ A steeply inclined surface and a gently inclined surface are formed on the outside in the radial direction of the pipe; ■The tip of the pressing tool must be formed into a curved surface.

Therefore, the present invention provides a link (, ′
Rubbing, bending the inclined surface of an entity into a polygonal or curved shape (C
and two types of cutting edges, wide and narrow, are provided at the bottom of the body.
Various embodiments are available, such as making the tip of the pressing tool a spherical surface, using the pressing tool as a bolt, or forming a groove on the inclined surface of the object.

The present invention will be described below based on embodiments shown in the drawings.

Fig. 1(-) Fig. 3 shows an embodiment of the present invention, in which 1 is the wort as an entity, and has a box-like shape. 11 is the front end surface of the wort; 12 is the rear end surface.The bottom of the sleeve 1 (in the installed state (inward in the radial direction of the pipe)
The cutting edge that contacts the pipe circumference of the insertion port is arranged in multiple stages in the width direction, and the front cutting edge 21 near the front end surface 11 is formed wider than the rear cutting edge 22 near the rear end surface 12iK. However, the shape of the cutting edge and the bottom can be freely modified as long as it engages with the surface of the receptacle.

The upper part of the wort 1 (in the installed state (on the outside in the pipe radial direction)) is formed into an inclined surface, and the wort 1 is brought to the front end surface 11 and forms a steep angle α (usually around 15°). Consisting of a gently sloped surface 32 connected to the steeply sloped surface 31 and the rear end surface 12 and has an angle β (usually around 5 degrees). aia is a groove formed in the steeply sloped surface 31, and 32aVi is a groove formed in the gently sloped surface 32. This is the groove that was created.

The grooves 31a, 32a have circular cross sections. However, the groove 31a.

32afd has been omitted.

4 is a bolt as a pressing tool, which has a tip portion 41° and a threaded portion 42. It consists of a bolt head 43. The tip 41 of the bolt is formed into a spherical surface, and is formed on the inclined surface of the wort 1 and has a g groove 3ia.
, 32a in line contact. And bolt 4
is the appropriate angle γ from the vertical (usually after 10'Mfl)
It is set at an angle.

It is a five-ring-shaped push ring, which is fitted into the socket 6 at the joint of the fluid pipe and engaged with the socket 7 by appropriate known means (for example, a fastener made of a bolt or nut). . The push ring 5 is in contact with the end face of the receiving socket 7 in this example, but in the case of a mechanical joint, an arm portion that compresses and suppresses the backing loaded in the receiving port protrudes from the pushing ring. It is provided. A wedge housing portion 51 is formed in a bulging shape over a predetermined location in the circumferential direction of the press ring 5, and a screw hole 5ia into which the bolt 4 is screwed passes through the ceiling wall of the housing portion 51. It is screwed. Screw hole 5
1au The above-mentioned inclined posture of the bolt 4 is maintained by tilting the hole axis toward the tube axis at an appropriate angle γ from the right angle to the tube axis.

Next, the operation of the detachment prevention fitting of the present invention having the above structure will be described.

When installing this detachment prevention fitting, the tip 41 of the bolt 4 is brought into contact with the gently sloped surface 32 at the rear of the wedge piece 1, and when the bolt 4 is further rotated and tightened, a strong pressure is applied to the surface of the wedge piece 1 insertion opening 6. will be done. At this time, the pressing force of the bolt 4 is
If the blade 2 is formed with a gentle slope, the force will be transmitted vertically (in other words, the component force in the horizontal or tube axis direction will be small), and if the cutting edge 22 corresponding to the slope 32 is formed narrowly, As the contact area becomes smaller and the pressing force is further concentrated, the cutting edge 22 of the wedge piece 1 will forcefully bite into the surface of the insertion opening 60. As a result, engagement of the wedge piece 1 with the surface of the insertion portion 6 during installation becomes reliable. Note that when forming the groove 32a with a circular cross section on the inclined surface 32 of the wedge piece 1, the tip 41 of the bolt 4 makes a line contact with the groove 32a,
The above-mentioned suppression force will be transmitted evenly.

Direction in which the insertion port 6 separates from the socket B7 (direction A in Figure 2)
When a pull-out force is applied to the socket and the socket 6 moves from the socket 7, the wedge piece 1 is biting into the surface of the socket 6, so the socket 6
◇ However, since the initial contact movement between the bolt salt and the wedge body 1 is performed on the gently sloped surface 32, when this pulling force is small, the movement of the insertion part is caused by the taper action of the gently sloped surface 32. Sufficiently prevented. When the pulling force becomes large, the gently inclined surface 32 of the tip 41H of the bolt 4
It slides over the top and reaches the steeply sloped surface 31 at the front of the wedge piece 1, causing a strong taper action on the surface 31. Since the bolt 4 is restrained by the push ring 4, the steeply inclined surface 31
The force generated is transmitted downward to the wedge piece 1 (inward of the pipe diameter),
In addition, if the cutting edge 21 at the front of the wedge piece 1 is formed wide, it can withstand an even larger load, and the insertion part 6 is strongly tightened by the wedge piece 1 and the detachment prevention metal fitting, and It will exert an ejection-preventing power. Incidentally, when the groove 31' having a circular cross section is formed on the inclined surface 31 of the wedge piece 1, the groove 31a and the tip end 41 of the bolt 4 come into line contact, so that the force is transmitted even more smoothly. As the wedge piece 1 moves as the insertion port 6 is pulled out, it comes into contact with the rear part of the bolt tip 41 on the gently sloped surface 32 and the front part of the bolt tip 41 on the steeply sloped surface 31. Therefore, the distance is not as great as it appears, but it stops at a small distance.

The configuration of the present invention is not limited to the above embodiment (hereinafter referred to as the first embodiment), and various design changes can be made without departing from the basic technical idea of the present invention.

That is, although the wedge body is a piece-shaped wedge piece in the first embodiment, it may be a ring-shaped wedge body (cut ring) that is fitted around the tube of the insertion port. In this case, the wedge housing portion 51 of the press ring 5
Needless to say, it becomes longer in the circumferential direction, and that pressing tools are provided at various places in the circumferential direction. In addition, the pressing tool is
In the embodiment, a bolt is used, but other means such as a protrusion protruding into the wedge housing portion 51 of the press ring 5 may be used.

FIG. 4 shows another embodiment of the invention. The structure of this embodiment is characterized in that the inclined surface of the upper surface of the wedge body 1 is formed into a curved surface that continuously changes from a gently inclined curved surface 32' to a steeply inclined curved surface 3f. Other configurations are similar to the first embodiment.

With this configuration, the tip 41 of the pressing tool 4 and the inclined surface 31' of the upper surface of the wedge body 1.

The contact with 32' is made continuously, and an even detachment prevention force is obtained.

Still another embodiment of the present invention is shown in FIGS. 5 and 6. The feature of the structure of this embodiment is that the tip of the bolt 4 is a truncated conical bolt tip 4f, and the groove provided in the wedge 1 is a dovetail groove 3b that loosely engages the bolt tip 4f. That's true. Other configurations are similar to the first embodiment. With this configuration, both the bolt 4 and the wedge body 1 are always in an engaged relationship, and the relative position of both can be easily maintained during installation, and the parts do not dissipate during transportation, making it convenient for parts management.

Since the detachment prevention fitting of the present invention has the above-mentioned structure and functions, it has the following superior effects compared to conventional ones.

■ When attaching this detachment prevention fitting to the joint flat part, the press button of the wedge press tool will securely hold it to the surface of the insertion port, and no harmful sliding will occur (1°■ When the mouth part separates from the socket part, since there is no sliding between the wedge body and the socket part, the pressing force (separation prevention force) generated by the taper action of the pressing tool and the wedge body is effectively transferred to the wedge body and the socket part. transmitted to.

■ The pressing force applied by the wedge pressing tool changes depending on the magnitude of the detachment force, and has the effect of alleviating the detachment force that responds to detachment in a variety of ways.

(2) Since the tip of the pressing tool is curved, it can follow the bending of the joint flat part well.

In addition to the above effects, each embodiment of the present invention has its own unique effects.

[Brief explanation of drawings]

Figures M1 to 3 are drawings showing embodiments of the detachment prevention fitting of the present invention, and Figure 1 is an exploded perspective view thereof. 3 is a sectional view taken along the line X-X in FIG. 2, FIG. 4 is a longitudinal sectional side view showing another embodiment of the present invention, and FIG. The figure is a vertical sectional side view showing still another embodiment of the present invention, and FIG. 6 is a YY@ cross-sectional view of FIG. 5. ...Blade tip, 3
1... Steep slope, 32... Gentle slope,
4...Press tool, 41...Tip of divine pressure tool, 5...Press ring, 6...Socket part, 7...
...Socket part. Figure 1 Figure 2 Figure 3 Figure 3 Figure 41! f

Claims (1)

[Claims] 1. A wedge body (1) that is fitted into a joint part of a fluid pipe and has a bottom part that engages with the surface of the insertion port (6); In the detachment prevention fitting comprising a suppressing tool (4) that presses from a direction, and a push ring (5) that accommodates the core body (1) and the pressing tool (4) and engages with the socket (7), the wedge A steeply inclined surface (31) and a gently inclined surface (3) are formed in succession in the axial direction of the tube of the body (1) in the radial direction, and the wedge body (1) of the pressing tool (41) ) inclined plane (31,3
2) A structure of a detachment prevention fitting for a fluid pipe joint portion, characterized in that the distal end portion (av) is formed into a curved surface. 2. The wedge body (4) is a wedge piece. Claims: Structure of the detachment prevention fitting for the fluid pipe joint according to claim 1. 3. The wedge body (4) is a retaining member. Structure. 4. Inclined surface of m-body (1) (:(1,;l 2)Fi
A structure of a detachment prevention fitting for a fluid pipe joint portion according to any one of claims 1 to 3, which has a broken line shape. 5. Slanted surface (81, 3'2g) of wedge body (1) is a continuous curved structure of a detachment prevention fitting for a fluid pipe joint portion according to any one of claims 1 to 3. 6. The structure of the detachment prevention fitting for a fluid pipe joint according to any one of claims 1 to 5, wherein the curved surface of the tip end (41) of the pressing tool (4) is a spherical surface. , a cutting edge is provided at the bottom of the wedge body (1), and a sharply inclined surface (
31), the cutting edge (21) corresponding to the gently inclined surface (32) is formed to have a wider width in the pipe circumferential direction than the cutting edge (2z) corresponding to the gently inclined surface (32). The structure of the detachment prevention fitting for the fluid pipe joint described in (1). 8. The suppressor (4) is a push ring (may be a bolt that is screwed into five pieces).The structure of the detachment prevention fitting for the fluid pipe joint portion according to any one of claims 1 to 7 (a). 9. Pressing tools (4) are attached to the inclined surfaces (31, 32) of the entity (1).
) fits the curved surface of the tip (41) of the groove (31a, 3
2a) A structure of a detachment prevention fitting for a fluid pipe joint portion according to any one of claims 1 to 8, wherein: 2a) is formed.