JPH09225854A - Press-fit device for tightening cylinder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To execute the press-fit operation of the tightening cylinder of pipes of plural kinds having different thickness by one press-in device for a tightening cylinder. SOLUTION: This press-fit device for a tightening cylinder is formed by being equipped with a receiving plate 10 of which a plurality of supporting grooves 12 having different sizes, for locking a coupling member 30 is opened at the outside end, a pushing/pressing plate 11 of which supporting grooves 13 which make a pair with the supporting grooves 12 of the receiving plate 10 for supporting a pipe 20 around which a tightening cylinder 40 is loosely fitted, is opened at the outside end, and a rod 2 which is connected to a ram 1 and slidably passed through by positioning the receiving plate 10 and the pushing/pressing plate 11, respectively on a base end side and a tip side, and the ram 1 is operated so that the rod 2 is drawn into its base end direction, thereby, the tightening cylinder 40 is forcibly fitted to the periphery of the connecting end 21 of the pipe 20 by the pushing/pressing plate 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, for example, in a gas pipe or a water pipe, forcibly fits a tightening cylinder to the outer periphery of the connecting end of the pipe so that the pipe and the joint member are securely connected and fixed. Regarding the press-fitting device of the tightening cylinder used to

[0002]

2. Description of the Related Art FIG. 3 shows a tightening step for tightening a connecting portion between a pipe 20 made of a synthetic resin such as polyethylene and a joint member 30 with a tightening tube 40. To connect the pipe 20 and the joint member 30, a tightening tube 40 made of synthetic resin having elastic restoring force is loosely fitted in advance to the outer circumference of the tube 20.
The insertion tube portion 31 of the joint member 30 is inserted into the expanded connection end portion 21 of 0 (FIG. 3A), and then the tightening tube 40 is moved toward the joint member 30 to move the connection end portion of the pipe 20. It is performed by press fitting into the outer periphery of the portion 21 and forcibly fitting (FIG. 3B). Tightening tube 40
By compressing and tightening the expanded portion of the pipe 20 by the elastic restoring force of the pipe 20, the connecting end portion 21 of the pipe 20 and the joint member 3
The outer peripheral surface of the insertion tube portion 31 of 0 is fixed in a crimped state.

FIG. 4 shows a conventional press-fitting device for a tightening cylinder used in the work of connecting the pipe 20 and the joint member 30 described above. In this press-fitting device for a tightening cylinder, a pressing plate 53 having a supporting groove 52 for supporting the pipe 20 is erected at the tip of a rod 51 operated by a hydraulic ram 50, and the ram is opposed to the pressing plate 53. A receiving plate 5 having a supporting groove 54 for locking and supporting the joint member 30 at the front end portion of 50.
5 are provided upright. And the hydraulic ram 50
Is operated to pull the rod 51 toward the base end thereof, so that the pressing plate 53 is pulled toward the receiving plate 55.

The pipe 2 is formed by using the above-described conventional press-fitting device for a tightening cylinder.
0 and the joint member 30, as shown in FIGS. 3 to 4, the male screw portion 37 of the joint member 30 is surrounded by a stopper 32 integrally provided and a flange 33 adjacent to the stopper 32. A groove 34 is formed, and the circumferential groove 34 of the joint member 30 and the support groove 54 of the receiving plate 55 are engaged with each other so that the joint member 30 is axially immovably locked and supported by the receiving plate 55. . Then, the insertion cylinder portion 31 of the joint member 30 is inserted into the connection end portion 21 of the pipe 20 in which the fastening cylinder 40 is loosely fitted to the outer periphery, and the pipe 20 is supported in the support groove 52 of the pressing plate 53.

Then, as shown in FIG. 4, when the rod 51 of the press-fitting device which has been prepared is pulled in the direction of the base end thereof, the tightening tube 40 which abuts against the edge of the support groove 52 on the inner surface of the pressing plate 53. Is pressed and attracted to the receiving plate 55 side. Therefore, the tightening cylinder 40 is press-fitted onto the expanded outer circumference of the connecting end portion 21 and is forcibly fitted.

[0006]

In the above-mentioned conventional press-fitting device for a tightening cylinder, the support grooves of the pressing plate and the receiving plate are each fixed to a predetermined size, and only a pipe having a predetermined diameter is provided. The press-fit connection of the tightening cylinder is possible. Therefore, when handling a plurality of types of pipes having different diameters, it is uneconomical to prepare a press-fitting device for a plurality of tightening cylinders having different support groove sizes.

The present invention has been made in view of the above problems, and it is an object of the present invention to enable the press-fitting operation of the press-fitting cylinders of a plurality of types of pipes having different diameters with a press-fitting device for one press-fitting cylinder. I am trying.

[0008]

In order to solve the above-mentioned problems, the present invention provides a receiving plate having a plurality of support grooves of different sizes for locking a joint member at its outer end, and a tightening tube. A pressing plate having a supporting groove that is paired with the supporting groove of the receiving plate that supports the loosely fitted pipe is provided at an outer end, and the receiving plate and the pressing plate that are connected to a ram are provided on the base end side. And a rod penetrating slidably at the distal end side, the ram is operated to pull the rod in the proximal direction, and the pressing plate causes the tightening tube to move. The above-mentioned problem was solved by forcibly fitting the outer periphery of the connection end portion of the above.

Further, by forming one side of the outer peripheral surface of the rod into a flat surface, the rod and the receiving plate and the pressing plate penetrated by the rod are non-rotatably provided, and the receiving plate and the pressing plate are provided. By aligning and in the circumferential direction, the support grooves of the receiving plate and the pressing plate are always paired,
A pair of support grooves to be used can be quickly selected from the support grooves.

Further, by providing the regulating cylinder penetrating with the rod between the receiving plate and the pressing plate, the movement allowance of the pressing plate is regulated, and the tightening cylinder can be fitted in the correct position.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIGS. 1 and 2 show an embodiment of a press-fitting device for a tightening cylinder of the present invention, and FIG. 3 shows a synthetic resin pipe 20 and a joint member 30 as described above. It shows a tightening step of tightening the connecting portion with the tightening tube 40.

The press-fitting device for a tightening cylinder of the present invention comprises a rod 2 which is operated by a ram 1, a receiving plate 10 which is slidably penetrated by the rod 2 and is located at the base end side of the rod 2, and the rod 2. And a pressing plate 11 located on the tip side of the.

The rod 2 is a bolt-shaped rigid rod that is rotatably connected to the hydraulic ram 1 at its base end in the circumferential direction and that is axially projecting from the tip end surface of the ram 1. The rod 2 penetrates through the central portions of the receiving plate 10 and the pressing plate 11, one side of the outer peripheral surface of which is a flat surface 3, a male screw is screwed on the front portion, and a nut 5 is screwed. ing.

The nut 5 is a stopper for preventing the receiving plate 10 and the pressing plate 11 from coming off from the rod 2, and is in contact with the outside of the pressing plate 11 to transmit the pulling force of the rod 2 to the pressing plate 11. belongs to.

The backing plate 10 is on the base end side of the rod 2, and
The pressing plate 11 is a steel plate which is slidably provided on the tip side of the rod by the rod 2, and the plates 10 and 11 are provided.
Has three support grooves 12a, 1 open at its outer ends.
2b, 12c, 13a, 13b, 13c are provided. These support grooves 12 and 13 are formed in a shallow U-shape with a semicircular bottom, and the support grooves 12 and 13 are selected so that pipes of three different thicknesses with different diameters can be selected and attached. , 13 are different in size. The support groove 12 of the receiving plate 10 and the support groove 13 of the pressing plate 11 are set to be paired with each other according to the thickness of the pipe to be supported.

Further, a hole 15 having the same shape as the cross section of the rod 2 having the flat portion 3 is formed in the central portion of each of the plates 10 and 11, and the rod 2 penetrates this hole 15 to penetrate each plate 10. , 1
1 is non-rotatably aligned with the rod 2 in the circumferential direction. Therefore, the support grooves 12, 1 of each plate 11, 12 are
The pairs of three are always kept in good condition.

The cylindrical body shown in FIG. 1 (b) is a regulating cylinder 25 which is mounted between the receiving plate 10 and the pressing plate 11 by being penetrated by the rod 2, and movement of the tightening cylinder 40 by the pressing plate 11. This is for controlling the movement allowance of the pressing plate 11 so that it is carried out without excess and deficiency and for proper tightening. Therefore, a plurality of regulating cylinders 25 having different lengths are prepared, and the one having a size suitable for the connection is appropriately selected and used according to the thickness of the pipe 20 and the size of the connecting portion.

As the restricting cylinder 25, one having a tubular cylinder 25a is usually used, and in order to fit this into the rod 2, the nut 5 is used.
Then, the pressing plate 11 is detached from the rod 2 for performing. In addition, when the restriction cylinder 25 is frequently replaced, the restriction cylinder 2 can be attached to and detached from the side surface of the rod 2.
It is preferable to use the tubular body 25b whose one side is open.

Needless to say, the press-fitting operation of the tightening cylinder 40 can be performed without using the restriction cylinder 25.

In order to connect the joint member 30 and the pipe 20 using the press-fitting device of the tightening cylinder configured as described above and press-fit the tightening cylinder 40 so as not to come off, first connect. Supporting groove 1 for the receiving plate 10 and the pressing plate 10 that fits the pipe 20
2 and 13 are selected, and a regulation tube 25 having an appropriate size is mounted between the receiving plate 10 and the pressing plate 11. Then, the rod 2 is rotated so that the joint member 30 and the pipe 20 can be easily supported, and the pair of selected support grooves 12 and 13 is set upward.

Next, the insertion tube portion 31 of the joint member 30 is inserted into the expanded connection end portion 21 of the tube 20 in which the tightening tube 40 is loosely fitted.
Insert and prepare. Then, the peripheral groove 34 of the joint member 30 is engaged with the support groove 12 of the receiving plate 10 to immovably lock and support the joint member 30 in the front-rear direction, and the support groove 13 of the pressing plate 11 is provided with a pipe. 20 is supported and the preparation is completed (FIG. 2).

Next, the ram 1 is operated to pull the rod 2 in the proximal direction, the receiving plate 10 is brought into contact with the tip surface 6 of the ram 1, and the pressing plate 11 is brought into pressure contact with the tip surface 26 of the regulation tube 25. .

By the above operation, the tightening tube 40 is moved to the pressing plate 11.
It is pressed by the inner edge 16 of the support groove 13 to move to the receiving plate 10 side, and is press-fitted to the outer peripheral surface of the expanded connection end 21 to be force-fitted.

Therefore, as shown in FIG.
The connection end portion 21 of the above is crimped to the outer periphery of the insertion tube portion 31 of the joint member 30 by the elastic force of the tightening tube 40, and the plurality of ridges 35 circumferentially provided on the outer peripheral surface of the insertion tube portion 31 form the pipe 20. While biting into the inner surface of the connecting end portion 21 of the above, the ring-shaped hook portion 41 provided around the opening end of the tightening tube 40 extends and engages with the locking groove 36 provided around the center of the joint member 30. To do.

By the above work, the tightening cylinder 40 is fixed to the joint member 30.
The pipe 20 and the pipe 20 are locked without coming out from the connecting portion, and the joint member 30 and the pipe 20 are firmly fixed and are connected without fear of coming off.

[0027]

The press-fitting device for a fastening cylinder according to the present invention, which is embodied in the form as described above, has the following effects.

According to the press-fitting device for the tightening cylinder of the first aspect, the tightening cylinder is loosely fitted to the receiving plate having a plurality of support grooves of different sizes for locking the joint member formed at the outer ends thereof. A pressing plate having a supporting groove paired with the supporting groove of the receiving plate for supporting the compressed pipe formed at the outer end, and the receiving plate and the pressing plate connected to a ram to form the receiving plate and the pressing plate respectively on the proximal side and the distal side. And a rod penetrating slidably therethrough, so that a supporting groove of a required size can be selected and used from a plurality of supporting grooves according to the thickness of the pipe. . Therefore, a plurality of types of pipes having different thicknesses can be connected with one press-fitting device, and it is not necessary to prepare a press-fitting device for a tightening cylinder for each pipe thickness, which is simple and economical.

Further, in the press-fitting device for a tightening cylinder according to a second aspect of the present invention, in addition to the above effects, by forming one side of the outer peripheral surface of the rod into a flat surface, the rod and the receiving member penetrated by the rod are provided. Since the plate and the pressing plate are provided so as not to rotate relative to each other and the receiving plate and the pressing plate are aligned in the circumferential direction, the supporting groove of the receiving plate and the supporting groove of the pressing plate are always held in a pair state. Therefore, it is possible to quickly select a pair of support grooves to be used from the plurality of support grooves, and it is possible to efficiently perform the replacement work of pipes having different thicknesses.

Further, in the press-fitting device for the tightening cylinder according to the third aspect of the present invention, in addition to the above effects, by providing the regulating cylinder penetrating with the rod between the receiving plate and the pressing plate, the pressing plate is provided. The movement of the tightening tube can be controlled without excess or deficiency. Therefore, the tightening cylinder can be fitted in the correct connecting position, and the tightening error can be prevented.

[Brief description of drawings]

1A and 1B show a press-fitting device for a tightening cylinder of the present invention, in which FIG. 1A is a perspective view and FIG. 1B is a restriction cylinder used in the same device.

FIG. 2 is a cross-sectional view showing a usage state of the press-fitting device of FIG.

3A and 3B show a tightening process of a pipe and a joint member by a tightening cylinder, where FIG. 3A is a sectional view before tightening and FIG. 3B is a sectional view after tightening.

4A and 4B show a conventional press-fitting device for a tightening cylinder, in which FIG. 4A is a side view and FIG. 4B is a rear view.

[Explanation of symbols]

1 ram, 2 rod, 3 flat surface, 10 support plate, 11
Pressing plate, 12 support groove, 13 support groove, 20 tube, 2
1 connection end, 25 regulation cylinder, 30 joint member, 40
Tightening tube

Claims (3)

[Claims] 1. A receiving plate having a plurality of supporting grooves of different sizes for locking a joint member formed at an outer end, and a supporting groove of the receiving plate for supporting a pipe in which a tightening cylinder is loosely fitted. A pressing plate having a pair of supporting grooves formed at the outer end, and a rod connected to a ram and slidably penetrating the receiving plate and the pressing plate at the proximal end side and the distal end side, respectively. A clamping mechanism characterized in that the ram is operated to pull in the rod in the direction of the base end thereof, thereby forcibly fitting the clamping cylinder to the outer periphery of the connecting end portion of the pipe by the pressing plate. Press-fitting device for attached cylinder. 2. The rod and the receiving plate and the pressing plate which are penetrated by the rod are formed non-rotatably by forming one side of the outer peripheral surface of the rod into a flat surface, and the receiving plate and the pressing plate. The press-fitting device for the tightening cylinder according to claim 1, wherein and are circumferentially aligned with each other. 3. The press-fitting device for a tightening cylinder according to claim 1 or 2, further comprising a restriction cylinder penetrating the rod between the receiving plate and the pressing plate.