JP5236689B2 - Pipe fitting - Google Patents

Description

  The present invention relates to a pipe connector for connecting synthetic resin pipes.

  Conventionally, there has been a connector for connecting a synthetic resin water pipe (for example, see Patent Document 1). As shown in FIGS. 11 and 12, this connection tool is composed of a connection tool main body 13 and a moving sleeve 14. Here, the connection tool main body 13 was provided with the insertion cylinder part 13a inserted in the connection end part 11a of the water flow pipe 11. FIG. On the other hand, the moving sleeve 14 is fitted on the outer peripheral side of the water conduit 11 and moves in the proximal end direction of the insertion tube portion 13a inserted in the connection end portion 11a of the water conduit 11 to move the connection end portion 11a. It was sandwiched between the insertion tube portion 13a. And the connection tool main body 13 has a movement preventing part 13b for preventing the movement of the connection end part 11a in the water conduit 11, and a receiving part 13c for receiving the pipe material of the connection end part 11a pushed out by the movement of the moving sleeve 14. And was provided. That is, when the moving sleeve 14 is moved in the proximal direction of the insertion tube portion 13a inserted in the connection end portion 11a of the water conduit 11, the distal end 11c of the connection end portion 11a becomes the distal end 13d of the movement preventing portion 13b. The tube material of the connecting end portion 11a gathered by the movement of the moving sleeve 14 while being in contact with the tube was pushed out toward the receiving portion 13c (see FIG. 12).

JP 2000-2384 A

  By the way, although the conventional connector has the receiving portion 13c, when the movable sleeve 14 is moved, a part of the tip 11c of the connection end portion 11a comes into contact with the tip of the movement preventing portion 13b. As a result, the tip end portion 11b of the connecting end portion 11a swells, and the load required to move the moving sleeve 14 increases.

  The present invention has been made in order to solve the above-described conventional drawbacks, and an object of the present invention is to provide a pipe connector that can reduce the load required to move the moving sleeve. is there.

In order to achieve the object, the pipe connector according to the present invention has the following configuration. That is,
The pipe connector according to the invention of claim 1 is a pipe connector for connecting a tube made of synthetic resin, and a connector main body provided with an insertion tube portion inserted into a connection end portion of the tube; The tube is fitted to the outer peripheral side of the tube and moved in the proximal direction of the insertion tube portion inserted into the connection end portion of the tube, and the connection end portion is clamped by the insertion tube portion. It consists of a moving sleeve. Here, the connection tool main body has an overhanging portion that protrudes outward from the base end of the insertion tube portion. The connector main body has a tube movement restricting portion that protrudes from the overhanging portion to the distal end side of the insertion tube portion, and the tip of the protruded tube movement restriction portion is a base of the insertion tube portion. It abuts on the tip of the connection end so as to restrict relative movement of the connection end toward the end. Therefore, around the outer periphery of the insertion tube portion, the moving sleeve fitted on the outer periphery side of the tube moves in the proximal direction of the insertion tube portion inserted in the connection end portion. Thus, while the tip of the connection end pushed by the moving sleeve falls inward from the tip of the tube movement restricting portion, the entire tip of the connection end moves while moving with the moving sleeve. An approach space is provided that proceeds to the proximal end side of the insertion tube portion. And the inner wall of the said pipe movement control part in the said approach space is formed in parallel with the axial center of the said insertion cylinder part toward the back | inner side.

In order to connect a tube made of synthetic resin to this tube connector, an insertion tube portion of the connector main body is inserted into the connection end portion of the tube, and a moving sleeve fitted on the outer peripheral side of the tube is inserted into the tube insertion tube. It moves in the direction of the base end of the part. At this time, the connection end portion is moved toward the proximal end side of the insertion tube portion so as to be pushed by the moving moving sleeve, but the connection end portion is moved when the distal end of the connection end portion moves the tube. By abutting against the tip of the restricting portion, it is temporarily blocked. When the moving sleeve is further moved, the tip of the connecting end pushed by the moving sleeve falls inward from the tip of the tube movement restricting portion, and the tip end of the connecting end is the tip of the tube moving restricting portion. Without being left behind, the whole enters the entry space and proceeds to the proximal end side of the insertion tube portion. In this way, when the entire tip end portion of the connection end portion enters the entry space, a part of the tip end of the connection end portion as in the prior art remains in contact with the tip end of the movement preventing portion. The load required to move the moving sleeve is reduced without the problem of the tip portion of the swell. Further, since the entry space is located on the inner tube portion side of the tube movement restricting portion, that is, on the inner side of the tube movement restricting portion, the tip end portion of the connection end portion becomes more tube-shaped as the outer diameter of the connection end portion is larger. It stays at the tip of the movement restricting portion and the timing of entering the entry space is delayed. Furthermore, as the outer diameter of the connection end increases, the friction between the outer periphery of the connection end and the inner periphery of the moving sleeve increases, and the degree of movement of the connection end following the movement of the moving sleeve increases. To do. Due to these two factors, it is possible to keep the amount by which the distal end portion of the connection end enters the entry space within a certain range regardless of variations in the outer diameter of the connection end.
The pipe connector according to the invention of claim 2 is the pipe connector according to claim 1, wherein the distal end of the pipe movement restricting portion is connected to the proximal end side of the insertion tube portion. And a stopper surface that stops the movement of the moving sleeve that has moved in the proximal direction of the insertion tube portion.

  According to the pipe connector according to the present invention, it is possible to prevent the tip end portion of the connection end portion from expanding due to the entire tip end portion of the connection end portion entering the entry space, and to move the moving sleeve. The required load is reduced.

It is a front view of one embodiment of the pipe connector according to the present invention. Similarly, it is an A arrow view in FIG. Similarly, it is sectional drawing by the BB line in FIG. Similarly, it is sectional drawing by CC line in FIG. Similarly, it is sectional drawing of the position equivalent to FIG. 4 which shows the 1st process of connecting a pipe | tube to a pipe connector. Similarly, it is sectional drawing of the position equivalent to FIG. 4 which shows the 2nd process of connecting a pipe | tube to a pipe connector. Similarly, it is sectional drawing of the position equivalent to FIG. 4 which shows the 3rd process of connecting a pipe | tube to a pipe connector. Similarly, it is sectional drawing of the position equivalent to FIG. 4 which shows the 4th process (end process) which connects a pipe | tube to a pipe connector. Similarly, it is a D arrow line view in FIG. Similarly, it is E arrow line view in FIG. It is sectional drawing which shows the intermediate process which connects a water pipe in the conventional connection tool. Similarly, it is sectional drawing which shows the completion | finish process which connects a water pipe.

  EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the pipe connector which concerns on this invention is demonstrated based on drawing.

  1 to 10 show an embodiment of a pipe connector according to the present invention. Reference numeral 1 in the figure denotes a pipe such as a water passage pipe, which is made of a synthetic resin pipe such as a crosslinked polyethylene resin. Reference numeral 2 denotes a pipe connecting tool for connecting the pipe 1, which includes a connecting tool main body 3 and a moving sleeve 4.

Here, the connector main body 3 is made of synthetic resin, for example, and is made of cheese formed by extending a cylindrical shape into a T shape. The connector main body 3 includes an insertion tube portion 3a that is inserted into the connection end portion 1a of the tube 1 at each end portion. The insertion tube portion 3a is formed in a cylindrical shape, and ring-shaped protrusions 3b and 3b are provided on the outer peripheral surface thereof to prevent the tube 1 from coming off. Further, the connector main body 3 projects outward from the proximal end of the insertion tube portion 3a (in the illustrated embodiment, the connection tool body 3 projects outward in a circular shape from the entire circumference of the proximal end of the insertion tube portion 3a). It has a protruding part 3c. Further, the connector main body 3 protrudes from the overhanging portion 3c to the distal end side of the insertion tube portion 3a, and the distal end 3g on the protruding side is connected to the proximal end side of the insertion tube portion 3a. It has a tube movement restricting portion 3d that comes into contact with the tip 1c of the connecting end 1a so as to restrict the relative movement of 1a (see FIG. 5). Therefore, around the outer peripheral portion of the insertion tube portion 3a, a movable sleeve 4 to be described later in detail fitted to the outer periphery side of the tube 1 is provided on the proximal end side of the insertion tube portion 3a inserted in the connection end portion 1a. By moving in the direction, the tip 1c of the connecting end 1a pushed by the moving sleeve 4 falls inward from the tip 3g of the pipe movement restricting portion 3d, so that the entire tip 1b of the connecting end 1a An approach space 3e is provided, which moves along with the moving sleeve 4 and proceeds toward the proximal end side of the insertion tube portion 3a. And the inner wall of the pipe movement control part 3d in the approach space 3e is formed in parallel with the axial center 3i of the insertion cylinder part 3a toward the back side. Here, in order to allow the entire distal end portion 1b of the connection end 1a to enter the entry space 3e, the interval Q between the tube movement restricting portion 3d and the insertion tube portion 3a is the thickness of the connection end 1a or the tube 1. The dimensions are as described above (see FIGS. 3 and 6). The tube movement restricting portion 3d protrudes at a part of the protruding portion 3c in the circumferential direction, and a window provided in a portion where the tube movement restricting portion 3d does not protrude faces the entrance space 3e outward. This is part 3f.

  Specifically, a plurality of the tube movement restricting portions 3d are equally arranged in the circumferential direction of the insertion tube portion 3a (in the illustrated embodiment, two are provided to be opposed to each other). Between the tube movement restricting portions 3d and 3d are the window portions 3f and 3f. The side 3h of the distal end 3g of the tube movement restricting portion 3d on the side of the insertion tube portion 3a is a straight line that is in contact with a circle centering on the axis 3i of the insertion tube portion 3a at the center of the side 3h. (See FIG. 2). The tube movement restricting portion 3d also serves as a sleeve stopper wall that stops the movement of the moving sleeve 4 that has moved in the proximal direction of the inner tube portion 3a.

  Further, the entry space 3e is in contact with the distal end portion 1b of the connection end portion 1a that is pushed out and advanced into the entry space 3e by the movement of the movable sleeve 4, and restricts the connection end portion 1a from being further pushed out. A tube movement restricting portion is provided. The second pipe movement restricting portion includes an extruding portion 3k, and the extruding portion 3k extends outward from the insertion tube portion 3a and is pushed out into the entry space 3e by the movement of the moving sleeve 4 and advances. The front end 1b of the connecting end 1a is pushed outward so as to ride up (see FIGS. 7 and 8). Specifically, the pushing portion 3k is provided so as to correspond to the window portion 3f. More specifically, the pushing portion 3k is provided inside the angle range S of the window portion 3f with the axis 3i of the insertion tube portion 3a as the center (see FIG. 3). And the extrusion part 3k is provided so that the whole may be located in the overhang | projection part 3c side rather than the front-end | tip 3g of the pipe | tube movement control part 3d. More specifically, the push-out portion 3k extends outward from the insertion tube portion 3a at the proximal end portion of the insertion tube portion 3a, and arcs along the circumferential direction of the insertion tube portion 3a. It is extended to form. Then, the end surface 3n on the distal end side of the insertion tube portion 3a of the pushing portion 3k is, for example, substantially the same as the insertion tube portion 3a so as to restrict the connection end portion 1a from being pushed out by the movement of the moving sleeve 4. It is formed to be vertical (including vertical) (see FIGS. 4 and 6).

  Further, in the connector main body 3, the distal end portion 1b of the connecting end portion 1a which is pushed out into the entry space 3e by the movement of the moving sleeve 4 and opened between the tube movement restricting portion 3d and the insertion tube portion 3a is opened. Thus, the rib 3p which guides to the extrusion part 3k side is provided (refer FIG. 3, FIG. 8-FIG. 10). In the illustrated embodiment, the end surfaces 3n and 3q on the distal end side of the insertion tube portion 3a of the pushing portion 3k and the rib 3p are substantially at the same position (the same position) in the axial center 3i direction of the insertion tube portion 3a. (See FIG. 1).

  On the other hand, the moving sleeve 4 is fitted on the outer peripheral side of the tube 1 and moves in the proximal direction of the insertion tube portion 3a inserted in the connection end portion 1a of the tube 1 (that is, the axis of the tube 1). , The connecting end 1a of the tube 1 is moved from the side entering from the connecting end 1a to the connecting end 1a side), and the connecting end 1a is sandwiched between the insertion tube portion 3a. The moving sleeve 4 is made of a metal material such as brass, and is formed in a cylindrical shape. The moving sleeve 4 has a taper portion 4a that is chamfered and has a tapered inner end portion on the leading end side.

  Next, the effect of the pipe connector 2 having the above configuration will be described. In order to connect the tube 1 made of synthetic resin to the tube connector 2, first, the movable sleeve 4 is fitted on the outer peripheral side of the tube 1. Next, the diameter of the mouth of the tube 1 is expanded using, for example, a diameter expansion tool to form the connection end 1a. Then, the pipe end 1a of the connector main body 3 is brought into contact with the enlarged connecting end 1a of the pipe 1, and the tip 3g of the pipe movement restricting portion 3d (sleeve stopper wall) is brought into contact with the tip 1c of the connecting end 1a. Interpolate until contact (see FIG. 5). Thereafter, the moving sleeve 4 fitted on the outer peripheral side of the tube 1 is brought into contact with the tube movement restricting portion 3d (sleeve stopper wall) in the proximal end side direction of the insertion tube portion 3a using, for example, a press-fitting tool. The connecting end 1a is clamped between the moving sleeve 4 and the insertion tube 3a (see FIG. 8).

  Here, the connection end 1a is pushed by the moving moving sleeve 4 to move to the proximal end side of the insertion tube portion 3a. The movement of the connection end 1a is performed by the connection end 1a. The tip 1c of the tube is temporarily blocked by contacting the tip 3g of the tube movement restricting portion 3d (see FIG. 5). When the moving sleeve 4 is further moved, the tip 1c of the connecting end 1a pushed by the moving sleeve 4 falls inward from the tip 3g of the pipe movement restricting portion 3d so that the tip 1b of the connecting end 1a. Is not left behind at the distal end 3g of the tube movement restricting portion 3d, but the whole enters the entry space 3e and proceeds to the proximal end side of the insertion tube portion 3a (see FIG. 6). In this way, the entire tip portion 1b of the connection end 1a enters the entry space 3e, so that a part of the tip of the connection end as in the prior art remains in contact with the tip of the movement preventing portion. There is no problem that the tip of the connecting end swells, and the load required to move the moving sleeve 4 is reduced. Further, since the entry space 3e is located on the inner tube portion 3a side of the tube movement restricting portion 3d, that is, on the inner side of the tube movement restricting portion 3d, the connection end portion increases as the outer diameter of the connection end portion 1a increases. The tip portion 1b of 1a stays at the tip 3g of the pipe movement restricting portion 3d, and the timing of entering the entry space 3e is delayed. Furthermore, as the outer diameter of the connecting end 1a is larger, the friction between the outer periphery of the connecting end 1a and the inner periphery of the moving sleeve 4 increases, and the connecting end 1a follows the movement of the moving sleeve 4. The degree of movement increases. Due to these two factors, the amount by which the distal end portion 1b of the connection end 1a enters the entry space 3e can be kept within a certain range regardless of variations in the outer diameter of the connection end 1a.

  In the illustrated embodiment, the push-out portion 3k as the second pipe movement restricting portion provided in the entry space 3e is pushed out into the entry space 3e by the movement of the moving sleeve 4, and the tip end portion of the connection end 1a advances. It abuts against 1b and restricts the connection end 1a from being pushed out further (see FIG. 6). Therefore, the pushing portion 3k can delay the end 1c of the connecting end 1a from reaching the overhanging portion 3c, or prevent the end 1c from reaching the overhanging portion 3c. That is, when the tip 1c of the connection end 1a reaches the overhang 3c, the force required for the subsequent movement of the moving sleeve 4 rapidly increases, but the tip 1c of the connection end 1a reaches the overhang 3c. By delaying the operation or preventing the tip 1c from reaching the overhanging portion 3c, an increase in the force required to move the movable sleeve 4 can be suppressed. In this way, by suppressing an increase in the force required to move the moving sleeve 4, the moving sleeve 4 can be smoothly moved until it reaches the tube movement restricting portion 3d (sleeve stopper wall).

  Further, here, the distal end portion 1b of the connecting end portion 1a that is pushed out into the entry space 3e advances outwardly so as to ride on the pushing portion 3k corresponding to the window portion 3f between the tube movement restricting portions 3d and 3d. Extruded (see FIGS. 7 and 8). Thus, the distal end portion 1b of the connection end portion 1a of the tube 1 is pushed out so as to ride on the push-out portion 3k. The push-out portion 3k corresponds to the window portion 3f (in the illustrated embodiment, the insertion portion 1b is inserted). The tube material on the window 3f side at the distal end portion 1b of the connecting end 1a is provided as a tube movement, provided inside the angle range S of the window 3f with the axis 3i of the cylinder 3a as the center. The tube material on the restricting portion 3d side is pulled out in the direction of the window portion 3f efficiently. And the tip part 1b of the connection end 1a is pushed in the direction of the window 3f by the pushing part 3k provided corresponding to the window 3f in this way, so that the connection end 1a The tip portion 1b can be easily visually observed, and the connection state of the tube 1 can be easily confirmed (see FIGS. 8 to 10). Moreover, in the illustrated embodiment, the distal end portion 1b of the connection end 1a of the tube 1 is guided to the pushing portion 3k side by the rib 3p between the tube movement restricting portion 3d and the insertion tube portion 3a. The tube material on the window 3f side at the tip 1b of the end 1a is pushed out in the direction of the window 3f more efficiently (see FIG. 10). Therefore, the tip portion 1b of the connection end portion 1a can be more easily seen from the window portion 3f.

  In addition, this invention is not necessarily limited to embodiment mentioned above, A various other change is possible. For example, the connector main body 3 may not be made of a synthetic resin but may be made of a metal such as brass or bronze. On the contrary, the moving sleeve 4 may be made of a synthetic resin instead of a metal as long as the strength is maintained.

  Moreover, the connector main body 3 may be an elbow that is bent and not a cheese formed in a T shape, or may be formed in other shapes such as a straight shape. . And although the connector main body 3 is provided with the insertion cylinder part 3a in each edge part, it is not necessary to provide the insertion cylinder part 3a in all the edge parts, for example, one edge part is the outer peripheral surface or inner side. A structure may be employed in which a screw portion is provided on the peripheral surface, and another connecting tool or the like is connected to the screw portion.

  In addition, although two pipe movement restricting portions 3d are provided, one or three or more pipe movement restricting portions may be provided. Further, although the rib 3p is provided between the tube movement restricting portion 3d and the insertion tube portion 3a, the rib 3p may not be provided.

  Moreover, the pipe | tube 1 may be a gas pipe | tube or an electric wire pipe other than a water flow pipe | tube, if it is a product made from a synthetic resin.

1 pipe 1a connection end 1b tip 1c tip 2 pipe connector 3 connector body 3a insertion tube 3c overhang 3d tube movement restricting part 3e entry space 3g tip
3i Axis 4 Moving sleeve

Claims (2)

A pipe connector for connecting synthetic resin pipes,
A connector main body having an insertion tube portion inserted into the connection end of the tube;
Movement that fits on the outer peripheral side of the tube and moves in the proximal direction of the insertion tube portion inserted into the connection end portion of the tube, and clamps the connection end portion with the insertion tube portion Consisting of a sleeve,
The connector main body has a projecting portion projecting outward from the proximal end of the insertion tube portion, and
The connector main body has a tube movement restricting portion that protrudes from the overhanging portion to the distal end side of the insertion tube portion, and a distal end of the protruding tube movement restriction portion is a proximal end side of the insertion tube portion Abutting on the tip of the connecting end so as to regulate the relative movement of the connecting end to
Around the outer peripheral portion of the insertion tube portion, the moving sleeve fitted on the outer periphery side of the tube moves in the proximal end direction of the insertion tube portion inserted in the connection end portion. The tip of the connecting end pushed by the moving sleeve falls inward from the tip of the tube movement restricting portion, and the entire tip of the connecting end moves while moving with the moving sleeve. An approach space is provided to proceed to the proximal end side of the insertion tube portion ,
An inner wall of the tube movement restricting portion in the entry space is formed in parallel to the axial center of the insertion tube portion toward the back side .   The distal end of the tube movement restricting portion is a restricting surface that restricts the relative movement of the connecting end portion toward the proximal end side of the insertion tube portion and moves in the proximal direction of the insertion tube portion. The pipe connector according to claim 1, wherein the pipe connector is a stopper surface that stops the movement of the movable sleeve.

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