JP4734886B2 - Connection structure between pipe fitting and connecting jig - Google Patents

Description

The present invention relates to a connection structure between a pipe joint and a connection jig. More specifically, for example, it is possible to easily fit and connect connection portions of a pair of joints to which a pipe through which a fluid flows is connected. The present invention relates to a connection structure between a pipe joint and a connection jig.

  Conventionally, when trying to connect the connection parts of a pair of joints connected to a pipe through which fluid (for example, liquid or gas) flows, the pipe is under pressure (for example, about 1 MPa). When trying to connect the connecting portions, the coupling force of the joint is obtained by multiplying the seal area by pressure, so that the coupling force increases, and it is often impossible to manually couple.

  As a countermeasure against this, it is conceivable that the pressure in the piping is first reduced and the pressure in the piping is lowered and combined.However, in many cases, the pressure must be repeatedly released. There was a problem that it was not possible to combine without lowering.

  Next, there is a method of generating a thrust greater than the coupling force by using screw fastening, but there is a method that the screw is rotated, so that the coupling takes time, and the amount of pressure fluid spilled during the coupling is large. was there.

In addition, there is a method of attaching a lever etc. to the joint and generating a thrust according to the lever principle etc., but there is a method to increase the thrust, it will be obstructive when trying to increase the thrust, and it will be big if the joint does not become large There has been a problem that thrust cannot be obtained (see, for example, Patent Document 1).
JP 2003-301983 A

The present invention pays attention to such a conventional problem, and even if there is pressure in the pipe, it can be reliably coupled in a short time and with a reduced amount of spillage of the pressure fluid, and a large thrust can be obtained with a simple configuration. An object of the present invention is to provide a connection structure between a pipe joint and a connection jig.

In order to achieve the above object, the connection structure between the pipe joint and the connection jig according to the present invention has a spring (26a) sandwiched between the inner pipe and the outer pipe, and an engaging sphere on the inner surface of the outer pipe. (28) on the outer surface of the tube fitting fitted between the inner tube and the outer tube, and the female joint (2a) having a connecting portion (3a) attached to the tip portion so that it can be moved in and out. connection between the engaging balls (28) by forming a fitting recess (29) for interfitting joint (3b) pipe joint and connecting jig to be connected to the male fitting (2b), the having a tip a structure, engaging the to the outer peripheral surface of the female fitting (2a) and male fittings (2b), a locking member (6, 7) which is detachably secured, respectively, to said locking member (6) A fixed claw (9) to be joined and a movable claw (10) to be engaged with the locking member (7) are attached to both ends. A pair of support frames (8a, 8b) extending in parallel to each other, and a link mechanism (11) for sliding the movable claw (10) along the longitudinal direction of the support frames (8a, 8b). The locking members (6, 7) are fixed to the outer peripheral surfaces of the female joint (2a) and the male joint (2b), respectively, and end portions of the connection portion (3a) and the connection portion (3b) The fixed claw (9) and the movable claw (10) are respectively engaged with the fixed locking members (6, 7) in a state where they are fitted to each other, and the connection portion ( 3a) and the connecting portion (3b) are pulled toward each other, and the engaging sphere (28) is fitted into the fitting recess (29) so that the female joint (2a) and the male joint (2b) The gist is to connect.

The movable claw (10) is fixed to a pair of sliders (22, 22) that are slidably fitted in elongated holes (25, 25) formed in the support frame (8a, 8b) extending in the longitudinal direction. At the same time, the link mechanism (11) has a pair of operation levers (12, 12) whose front ends are rotatably connected to the sliders (22, 22), and one end portion of the support frame (8a, 8b). A pair of links (16, 16) fixed in the vicinity of the fixed claw (9) so as to be rotatable and having the other end rotatably fixed to an intermediate portion of the operation lever (12, 12). To do.

The pair of links (16, 16) are connected by a connecting member (20), and the pair of operation levers (12, 12) are connected by a connecting member (23a, 23b), and the connecting members (20 , 23a, 23b) can be divided or added .

A spacer having a predetermined length is interposed in the elongated hole (25, 25) .

  As described above, the jig main body has a pair of left and right support frames and a movable claw connected to each other via a link mechanism and an operation lever so as to be rotatable. The amount of spillage can be reduced and bonding can be performed reliably.

Since the present invention is configured as described above, the following excellent effects can be obtained. (a) Even if there is pressure in the pipe, it can be securely connected in a short time and with a reduced amount of spillage of the pressure fluid.
(b) It is possible to obtain a large thrust with a simple configuration and to easily perform the coupling operation.
(c) The jig main body can be removed from the joint except when the connection portions of the pair of joints are joined to each other.
(d) By providing an upper and lower positioning member on the jig body or the locking member, and making the direction of the force applied to the operation lever constant, it is possible to facilitate the coupling operation between the connecting portions of the pair of joints. .
(e) Since the locking members attached to the pair of joints have the same form, there is no need to select the mounting direction of the jig body. As a result, the joint is not enlarged, and the joint can be easily coupled even when pressure is applied in the pipe, and the pipe joint can be made without polluting the environment.

  Hereinafter, an example of an embodiment of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a plan view with a half cross section taken along a center line OO in a state where a jig body is mounted on a pair of joints before connection for carrying out the pipe joint connection method of the present invention, and FIG. FIG. 3 is a plan view of a half section taken along the center line OO between the pair of joints and the jig body after connection, and FIG. 4 is a front view of FIG.

  A pair of joints 2a and 2b connected to pipes 1a and 1b through which the fluid (in this embodiment, a liquid is used, but can also be applied when using a gas) are connected (for female use) When the male connection portions 3a and 3b are fitted and connected, the jig body 4 of the connection jig of the present invention is attached.

  As shown in FIGS. 6 and 7, the pair of joints 2 a and 2 b have a pair of hook-shaped locking claws 5 provided on the jig body 4 and a locking portion (not shown) that can be engaged and disengaged. The detachable locking members 6 and 7 are provided.

  1 to 4 and 8 to 12, the jig body 4 has the locking portions (not shown) or locking at both ends of a pair of left and right support frames 8a and 8b. The pair of left and right support frames 8a is provided with a fixed claw 9 constituting a pair of hook-shaped locking claws 5 that engage with the members 6 and 7, and a movable claw 10 movable along the support frames 8a and 8b. , 8b and the movable claw 10 are rotatably connected via a link mechanism 11 and a pair of left and right operating levers 12.

  The locking portion (not shown) is a concave portion or a convex portion formed on the surface of the pair of joints 2a and 2b, and the locking members 6 and 7 are a pair of joints as shown in FIGS. The receiving members 13a and 13b are fitted to the semicircular surfaces 2a and 2b, and the fastening members 14 such as bolts and nuts for connecting and fixing the flanges at both ends of the receiving members 13a and 13b. Yes.

  In addition, the jig body 4 or the locking members 6 and 7 are provided with the vertical positioning member 15 so that the direction of the force applied to the operation lever 12 is constant, and the connecting portions 3a and 3b of the pair of joints 2a and 2b are coupled to each other. It can be made easy.

  The link mechanism 11 rotatably connects one end of a pair of left and right links 16 to a pair of left and right support frames 8a and 8b via pins 17 and the tip of the operation lever 12 via the pins 18 to the movable claws. 10, and the other end of the link 16 is rotatably connected to the vicinity of the tip of the operation lever 12 via a pin 19.

  The pair of left and right links 16 are connected by a connecting member 20 and a fastening member 21 such as a bolt, and the center and rear end sides of the pair of left and right operating levers 12 are formed in the same length as the connecting member 20. Alternatively, they are connected by plate-like connecting members 23a and 23b and fastening members 24 such as bolts.

  A long hole 25 having a predetermined length is formed on the side surface of the pair of left and right support frames 8a and 8b on the movable claw 10 side (the right side in FIGS. 8 to 11). A slider 22 with 10 fixed inside is slidably fitted, and the tip of the operation lever 12 is rotatably connected to the movable claw 10 and the slider 22 via a pin 18.

  Accordingly, as shown in FIGS. 8 and 9, the operation lever 12 is shown in FIGS. 8 to 12 from a state where it is raised with respect to the pair of left and right support frames 8 a and 8 b (approximately 75 ° in the embodiment of the present invention). When the operating lever 12 is turned in the arrow X direction, the link 16 turns clockwise (clockwise) with the pin 17 at one end of the link 16 connected to the support frames 8a and 8b as a fulcrum. At the same time, the movable claw 10 connected to the tip of the operation lever 12 via the pin 18 moves to the fixed claw 9 side along the long hole 25 via the slider 22. , Engaging portions formed on the surfaces of the pair of joints 2a and 2b, or engaging members 6 and 7 to engage and connect the connection portions 3a and 3b of the pair of joints 2a and 2b It is.

  Further, when the operation lever 12 is turned counterclockwise (Z direction) from the state shown in FIGS. 10 to 12 with the connection portions 3a and 3b of the pair of joints 2a and 2b fitted and connected, the movable claw 10 Retreats along the long hole 25 via the slider 22, and the fixed claw 9 and the movable claw 10 are detached from the locking portions formed on the surfaces of the pair of joints 2 a and 2 b or the locking members 6 and 7. The jig body 4 can be removed from the pair of joints 2a and 2b.

  In addition, when adjusting the space | interval of the left-right paired support frame 8a, 8b of the jig | tool main body 4 mentioned above, the connection member 20 which connects the left-right paired link 16 is divided | segmented, or an intermediate member is interposed. The connecting members 23a and 23b that connect the fastening members 21 such as bolts and the pair of left and right operation levers 12 are divided or connected by the fastening members 24 such as bolts with an intermediate member interposed therebetween. Thus, the interval between the support frames 8a and 8b can be adjusted, and even when the diameters of the pair of joints 2a and 2b are changed, it is possible to cope with them.

  Further, when adjusting the distance between the fixed claw 9 and the movable claw 10 of the jig body 4, it can be easily performed by regulating the position of the slider 22 that slides along the long hole 25. For example, it can be easily performed by interposing a spacer or the like having a predetermined length in the long hole 25, and this can cope with a case where the distance between the joints 2a and 2b changes. .

Next, a pipe joint connection method according to an embodiment of the present invention will be described.
First, as shown in FIGS. 1 and 2, locking members 6 and 7 constituted by receiving members 13a and 13b and a fastening member 14 are mounted in advance at predetermined positions of the pair of joints 2a and 2b. And the connection parts 3a, 3b of the pair of joints 2a, 2b (for female and male) to which the pipes 1a, 1b are connected are in the coupling start position, that is, the connection part of the joint 2b to the connection part 3a of the joint 2a The jig body 4 is covered from the upper side with the 3b fitted, and the fixed claw 9 and the movable claw 10 constituting the pair of hook-shaped locking claws 5 are locked to the locking members 6 and 7.

  When the operating lever 12 is turned in the direction of arrow X from the state shown in FIGS. 1 and 2, the link 16 is moved by the lever principle with the pin 17 at one end of the link 16 connected to the support frames 8a and 8b as a fulcrum. The movable claw 10 that turns clockwise (clockwise) and is connected to the tip of the operation lever 12 via the pin 18 at the same time moves to the fixed claw 9 side along the long hole 25 via the slider 22. Thus, the connection portions 3a and 3b of the pair of joints 2a and 2b engaged with the locking members 6 and 7 of the pair of joints 2a and 2b by the fixed claws 9 and the movable claws 10 are connected to the springs 26a and 26b. When the engaging sphere 28 provided in the sleeve 27 provided in the connecting portion 3a of the joint 2a is engaged with the fitting recess 29 formed in the connecting portion 3b of the joint 2b, the fitting connection is completed. To do.

  In such a state, the connecting portions 3a and 3b of the pair of joints 2a and 2b (for female and male) can be reliably and easily connected without spilling the liquid flowing in the pipes 1a and 1b. Is something you can do.

  In addition, after the connection of the connecting portions 3a and 3b of the joints 2a and 2b is completed, the jig body 4 may get in the way of the piping path, so it is desirable to remove the jig body 4 from the joints 2a and 2b. . In this case, as described above, with the connection portions 3a and 3b of the pair of joints 2a and 2b fitted and connected, the operation lever 12 is counterclockwise (Z direction) from the state shown in FIGS. The movable claw 10 is retracted along the long hole 25 via the slider 22 and the fixed claw 9 and the movable claw 10 are connected to the engaging portions formed on the surfaces of the pair of joints 2a and 2b, or a pair of The jig body 4 can be easily detached from the pair of joints 2a and 2b by being detached from the locking members 6 and 7 attached to the joints 2a and 2b, respectively.

  As described above, the locking portions formed on the pair of joints 2a and 2b or the locking members 6 and 7 attached to the pair of joints 2a and 2b, respectively, The fixed claw 9 and the movable claw 10 constituting the locking claw 5 are respectively locked, and the pair of fixed claw 9 and the movable claw 10 are operated in the approaching direction by the link mechanism 11 and the pair of left and right operation levers 12, Since the connection portions 3a and 3b of the pair of joints 2a and 2b are fitted and connected, even if there is pressure in the pipes 1a and 1b, the connection is ensured in a short time and with a reduced amount of pressure fluid spillage. I can do it.

  Further, a large thrust can be obtained with a simple configuration, and the coupling operation can be easily performed. In addition, the jig body 4 can be removed from the joints 2a and 2b except when connecting the connection portions 3a and 3b of the pair of joints 2a and 2b, so that the jig body 4 is not obstructed and easy to handle. It is.

It is the top view made into the half cross section by centerline OO of the state which mounted | wore with the jig main body to a pair of joint before the connection for enforcing the connection method of the pipe joint of this invention. It is a front view of FIG. It is the top view made into the half cross section by centerline OO of a pair of joint after connection and a jig | tool main body. FIG. 4 is a front view of FIG. 3. It is a half sectional view of a joint. It is a front view of the locking member with which the female joint is mounted. It is a front view of the locking member with which the male joint is mounted. It is a top view before operation of a jig body. It is a front view of FIG. It is a top view after operation of a jig main part. It is a front view of FIG. It is a side view of FIG.

Explanation of symbols

1a, 1b Piping 2a, 2b Joint 3a, 3b Connection 4 Jig body
5 Locking claws 6, 7 Locking members 8a, 8b Support frame 9 Fixing claws
10 Movable claw 11 Link mechanism
12 Operation lever
13a, 13b Receiving member 14 Fastening member
15 Vertical positioning member 16 Link
17 pin 18 pin
19 pin 20 connecting member
21 Fastening member 22 Slider 23a, 23b Connecting member 24 Fastening member
25 long hole
26a, 26b Spring 27 Sleeve
28 Engaging sphere 29 Fitting recess

Claims (4)

For females having a spring (26a) sandwiched between an inner tube and an outer tube, and having a connecting portion (3a) at the distal end portion of which an engaging sphere (28) is removably attached to the inner surface of the outer tube. A joint (2a);
A connecting portion (3b) formed by forming a fitting recess (29) into which the engaging sphere (28) is fitted on the outer surface of the tube fitting between the inner tube and the outer tube is formed at the tip. A joint structure for connecting a male joint (2b) having a pipe joint and a connecting jig,
Locking members (6, 7) fixed to the outer peripheral surfaces of the female joint (2a) and the male joint (2b) in a detachable manner,
A pair of supports extending in parallel with each other, with a fixed claw (9) engaged with the locking member (6) and a movable claw (10) engaged with the locking member (7) respectively attached to both ends. Frames (8a, 8b);
A link mechanism (11) for sliding the movable claw (10) along the longitudinal direction of the support frame (8a, 8b),
The locking members (6, 7) are fixed to the outer peripheral surfaces of the female joint (2a) and the male joint (2b), respectively, and the ends of the connection part (3a) and the connection part (3b) are connected to each other. The fixed claw (9) and the movable claw (10) are respectively engaged with the fixed locking members (6, 7) in a state in which the connecting portion (3a) is engaged by the link mechanism (11). ) And the connecting portion (3b) are pulled toward each other, and the engaging sphere (28) is fitted into the fitting recess (29) to connect the female joint (2a) and the male joint (2b). Connection structure of connecting pipe joint and connecting jig. The movable claw (10) is fixed to a pair of sliders (22, 22) that are slidably fitted in elongated holes (25, 25) formed in the support frame (8a, 8b) extending in the longitudinal direction. With
A pair of operating levers (12, 12) having a distal end rotatably connected to the slider (22, 22), the link mechanism (11);
One end of the support frame (8a, 8b) is pivotally fixed in the vicinity of the fixed claw (9), and the other end is pivotally fixed to an intermediate portion of the operation lever (12, 12). The connection structure between the pipe joint and the connection jig according to claim 1, wherein the connection structure is constituted by a pair of links (16, 16). The pair of links (16, 16) are connected by a connecting member (20), and the pair of operation levers (12, 12) are connected by a connecting member (23a, 23b), and the connecting members (20 , 23a, 23b) can be divided or added, and the connection structure between the pipe joint and the connection jig according to claim 2. The connection structure between a pipe joint and a connection jig according to claim 2 or 3, wherein a spacer having a predetermined length is interposed in the elongated hole (25, 25).

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