JP2013032811A - Pipe joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe joint that further facilitates attaching and detaching.SOLUTION: The pipe joint includes: a tubular female joint body 52 in which a male joint is inserted from a tip; and a pair of fixing arms 53 having base ends each pivotally supported on both sides of the tips of the female joint body 52 in a turnable manner. The pipe joint also fixes the female joint 50 to the male joint in response to a turn of the fixing arm 53. The pipe joint includes: a pair of handle arms 58 on which handles 57 serving as grips are each provided at tips and which have base ends 59 pivotally supported on both sides of rear ends of the female joint body 52 in the turnable manner; and a link arm 60 mechanically connecting the handle arm 58 with the fixing arm 53 to make the fixing arm 53 turn in conjunction with a turn of the handle arm 58.

Description

  The present invention relates to a pipe joint that detachably connects two members.

  As a pipe joint for detachably connecting two members, a cam arm type pipe joint as shown in Patent Documents 1 and 2 is known. As shown in FIG. 5, the cam arm type pipe joint includes a male joint 10 and a female joint 11 into which the male joint 10 is inserted from the tip. The female joint 11 includes a circular pipe-shaped female joint body 12 and a pair of left and right fixing arms (cam arms) 13. The base end portion of the fixing arm 13, that is, the fixing arm base end portion 14, is pivotally fixed to the left and right sides of the distal end portion of the female joint body 12. Each fixing arm base end portion 14 is formed in an eccentric cam shape, and the cam nose 15 protrudes toward the inner peripheral side of the female joint body 12 in accordance with the rotation of the fixing arm 13. Yes. On the other hand, an engagement groove 16 is provided on the outer periphery of the male joint 10. Then, the male joint 10 is inserted into the female joint 11 and the fixing arm 13 is rotated, whereby the cam nose 15 is engaged with the engaging groove 16 and is fixed so that both the joints are not removed.

JP 2004-183844 A JP 2007-218281 A

  In such a conventional cam arm type pipe joint, depending on the attachment position and the attachment direction, it may be necessary to operate the fixing arm 13 while holding the female joint body 12 and holding the position of the female joint 11. For example, if the male joint 10 is provided with the tip tilted downward, the female joint 11 will come off the male joint 10 unless the female joint 11 is held by holding the female joint body 12. Therefore, it is necessary to operate the fixing arm 13 for fixing while holding the female joint body 12. Therefore, one person cannot hold the female joint 11 and operate the fixing arm 13 at the same time, and a plurality of workers are required to install and remove the pipe joint. there were.

  The present invention has been made in view of such circumstances, and a problem to be solved is to provide a pipe joint that can be attached and detached more easily.

In the following, means for achieving the above object and its effects are described.
The invention according to claim 1 is a pair of a tubular female joint body into which a male joint is inserted from the distal end, and a base end portion pivotally fixed to the left and right sides of the distal end portion of the female joint body. A fitting arm, and a pipe joint that fixes the female joint to the male joint in response to the rotation of the fixing arm, each of which has a handle portion as a handle at a tip thereof, and the female joint Provided with a pair of handle arms having base ends pivotably supported on both the left and right sides of the rear end of the main body, and the fixing arm is rotated in conjunction with the rotation of the handle arm. This is the gist.

  According to the above configuration, the fixing arm and the handle arm are pivotally fixed to the front end portion and the rear end portion of the female joint body, respectively, and the fixing arm is rotated in conjunction with the rotation of the handle arm. did. Therefore, by having the handle part, it is possible to support the female joint body at both the front end part and the rear end part. By simply having the handle part, the handle for fixing and releasing the male joint and the female joint is possible. The arm can be operated and the female joint body can be held. Therefore, according to the said structure, attachment and detachment of a pipe joint can be performed more easily.

  According to a second aspect of the present invention, in the pipe joint according to the first aspect, the handle arm and the fixing arm are arranged such that the fixing arm is rotated in conjunction with the rotation of the handle arm. The gist of the present invention is to provide a link arm that mechanically connects the two.

According to the above configuration, the rotation of the fixing arm in conjunction with the rotation of the handle arm can be realized with a simple configuration.
According to a third aspect of the present invention, in the pipe joint according to the second aspect, the length from the handle arm base end portion, which is the base end portion of the handle arm, to the connecting portion of the handle arm with the link arm is increased. The gist of the invention is that it is longer than the length from the fixing arm base end portion, which is the base end portion of the fixing arm, to the connecting portion of the fixing arm with the link arm.

  According to the above configuration, the amount of rotation of the fixing arm that is linked to the amount of rotation of the handle arm when the handle arm is rotated increases. Therefore, the male joint and the female joint can be fixed and released by rotating the smaller handle arm.

  The gist of the invention according to claim 4 is the pipe joint according to claim 2 or 3, wherein at least one of the fixing arm, the handle arm and the link arm is made of a heat insulating member.

  According to the above configuration, it is possible to suppress heat from being transmitted to the handle portion. Therefore, it is possible to easily attach and remove the pipe joint even when the male joint is at a high temperature or a low temperature.

  According to a fifth aspect of the present invention, in the pipe joint according to any one of the first to fourth aspects, the left and right handle arms are elastic bodies at a position separated by a certain length from the base end portion. The gist is that they are connected to each other.

  According to the above configuration, the elastic force of the elastic member is applied to the handle arm, and the operation force of the handle arm for fixing and releasing the male joint and the female joint is reduced, and the handle arm is rotated. It becomes possible to regulate. For example, in the case where the elastic force of the elastic member acts in the direction in which the male joint and the female joint are fixed, the position of the handle arm is stably fixed at the fixed position of the male joint and the female joint, It is suppressed that the handle arm moves due to contact with the other body or its own weight, and the fixation between the male joint and the female joint is released.

  A sixth aspect of the present invention is the pipe joint according to any one of the first to fifth aspects, wherein the handle portion is extended in a direction bent from the extension direction of the handle arm. And

  According to the said structure, when the attachment position of a pipe joint exists in a low position or a high position, in the operation | work of attachment and removal, it may be necessary to bend down greatly or to extend a hand greatly. Even in such a case, if the handle part is bent upward and downward with respect to the handle arm, it is possible to attach and remove the fixing arm type pipe joint without crouching or reaching greatly. Work can be done.

  In addition, the pipe joint of this invention can be embodied as what is used for attachment of the measurement probe, for example, as described in claim 7.

(A) of the pipe joint concerning 1st Embodiment of this invention is sectional drawing which each shows the partial cross-section of the female joint after attachment of the measurement probe, (b) after attachment of the measurement probe. The figure which shows the structure of the link mechanism provided in the female joint of the pipe joint concerning the embodiment. (A)-(c) The figure which shows the attachment procedure to the male joint of the female joint in the pipe joint of the embodiment. (A) is a figure which shows the shape of the handle arm and handle part which are provided in the pipe joint of the embodiment, and (b)-(e) shows the shape of the modification, respectively. Sectional drawing which shows the plane cross-section of the conventional cam arm type pipe joint.

  Hereinafter, an embodiment in which a pipe joint according to the present invention is embodied will be described with reference to FIGS. In addition, the pipe joint of this embodiment is comprised as a cam arm type pipe joint which fixes a male joint and a female joint with the cam provided in the cam arm. A measuring probe provided with sensors such as a temperature sensor and a flow rate sensor is attached to the female joint of the pipe joint. For example, by fixing a male joint provided on a pipe through which a high-temperature fluid flows to the female joint, the probe is used to install a measurement probe on the pipe.

  As shown in FIG. 1A, the female joint 51 of the pipe joint of the present embodiment is provided with a substantially circular pipe-shaped female joint body 52 into which the male joint is inserted from the tip. The base end of a rod-shaped fixing arm (cam arm) 53, that is, the fixing arm base end 54, is pivotally fixed to the left and right sides of the distal end portion of the female joint body 52 so as to be rotatable about the fulcrum A61 as a supporting shaft. Has been. The fixing arm base end portion 54 is formed in a cam shape including a cam nose 55 protruding in the radial direction of the support shaft by the support point A61. The cam nose 55 projects toward the inner peripheral side of the female joint main body 52 in accordance with the rotation of the fixing arm 53 around the fulcrum A61.

  On the other hand, on the left and right sides of the rear end portion of the female joint main body 52, the base end portion of the rod-shaped handle arm 58, that is, the handle arm base end portion 59, is pivotally supported with the fulcrum B62 as a support shaft. . A handle portion 57 serving as a handle is provided at an end portion of the handle arm 58 on the opposite side of the fulcrum B62. In the present embodiment, as shown in FIG. 4A, the handle portion 57 is formed in a substantially O shape, and the grip portion is curved in a U shape. Yes.

  The handle arms 58 provided on the left and right of the female joint 51 are connected to each other by an elastic body 65 at a position separated from the handle arm base end portion 59 by a certain length. In the present embodiment, a coil spring is employed as the elastic body 65.

  The fixing arm 53 and the handle arm 58 are mechanically connected by a bar-shaped link arm 60. One end of the link arm 60 is pivotally supported at a fulcrum C63 provided at a certain distance from the fixing arm base end portion 54 of the fixing arm 53, and the other end is a handle of the handle arm 58. It is pivotally supported at a fulcrum D64 provided at a position away from the arm base end portion 59 by a certain distance. As a result, a link mechanism for rotating the fixing arm 53 in conjunction with the rotation of the handle arm 58 is configured. Incidentally, in this female joint 51, the rotation axis of the fixing arm 53 centered on the fulcrum A61, the rotation axis of the handle arm 58 centered on the support shaft B62, and the rotation of the link arm 60 centered on the support shaft C63. The rotation axis of the link arm 60 around the dynamic axis and the support shaft D64 is configured to be parallel to each other.

  In this embodiment, at least one of the fixing arm 53, the handle arm 58, and the link arm 60 is a heat insulating member having a smaller heat transfer coefficient than the female joint main body 52, so that heat to the handle portion 57 can be obtained. I try to suppress transmission.

  On the other hand, as shown in FIG. 1B, a rod-shaped measurement probe 70 is inserted along the central axis of the female joint body 52 from the rear end of the female joint body 52. The measurement probe 70 is fixed to the female joint body 52 by screwing at a position where the distal end of the measurement probe 70 is inserted until it protrudes from the front end of the female joint body 52. Note that the elastic body 65 that connects both the handle arms 58 described above is provided on the tube of the female joint main body 52 in order to avoid interference with a portion that protrudes from the rear portion of the female joint main body 52 of the measuring probe 70 and extends. It is disposed at a position offset by a certain distance from the central axis.

  In addition, in the female joint 51 of the cam arm type pipe joint of the present embodiment, as shown in FIG. 2, the length La from the fulcrum A61 to the fulcrum C63 is longer than the length Lb from the fulcrum B62 to the fulcrum D64. ing. For this reason, the rotation amount of the fixing arm 53 interlocked with the rotation amount of the handle arm 58 when the handle arm 58 is rotated is increased.

(Function)
Here, a procedure for attaching the pipe joint, that is, a procedure for fixing the female joint 51 to the male joint will be described. The male joint 50 is formed in a circular tube shape, and an engagement groove 56 is recessed at the tip thereof so as to go around the outer periphery.

  When the female joint 51 is fixed to the male joint 50, first, as shown in FIG. 3A, both handle arms 58 are opened to the outside of the female joint 51. Then, as shown in FIG. 3B, the female joint 51 is moved so that the male joint 50 is inserted from the tip of the female joint body 52 while holding the female joint 51 by grasping the handle portion 57. Finally, in a state where the male joint 50 is completely inserted into the female joint main body 52, the handle arm 58 is rotated until the tip thereof is directed to the rear of the female joint 51, so that both the handle arms 58 are located inside the female joint 51. Closed. In response to the rotation of the handle arm 58 at this time, the fixing arm 53 connected to the handle arm 58 through the link arm 60 rotates in conjunction with the handle arm 58. Then, by the rotation of the fixing arm 53, the cam nose 55 provided on the fixing arm base end portion 54 protrudes to the inner periphery of the female joint body 52 and engages with the engaging groove 56 of the male joint 50. Thus, the male joint 50 and the female joint 51 are fixed.

Incidentally, the removal of the pipe joint, that is, the release of the fixing of the female joint 51 and the male joint 50 is performed by a procedure reverse to the above-described fixing procedure.
According to the embodiment described above, the following effects can be obtained.

  (1) The fixing arm 53 and the handle arm 58 are respectively fixed to the front end portion and the rear end portion of the female joint main body 52, and the fixing arm 53 and the handle arm 58 are mechanically connected by the link arm 60. ing. Therefore, by having the handle portion 57 provided at the front end of the handle arm 58, the female joint body 52 can be supported by both the front end portion and the rear end portion. 50 and the female joint 51 can be fixed and released, and the handle arm 58 can be operated and the female joint body 52 can be held. Therefore, according to this embodiment, attachment and detachment of a pipe joint can be performed more easily.

  (2) Since the rotation amount of the fixing arm 53 linked to the rotation amount of the handle arm 58 when the handle arm 58 is rotated is larger than the rotation amount of the handle arm 58, the smaller operation of the handle arm 58 is possible. The male joint 50 and the female joint 51 can be fixed and released. In addition, since the smaller handle arm 58 can be turned, the pipe joint operator can move the distal end of the male joint 50 and the female joint body 52 when the male joint 50 is hot or cold. It is possible to easily attach and detach the pipe joint in a state further away from the pipe.

  (3) Since the elastic force of the elastic body 65 is applied to the handle arm 58, the operating force of the handle arm 58 for fixing and releasing the male joint 50 and the female joint 51 can be reduced. . Further, since the elastic force of the elastic body 65 acts in the direction in which the male joint 50 and the female joint 51 are fixed, the position of the handle arm 58 is stable at the fixed position of the male joint 50 and the female joint 51. Then, the handle arm 58 is moved by contact with the other body or its own weight, and the male joint 50 and the female joint 51 are prevented from being released from being fixed.

  (4) Since at least one of the fixing arm 53, the handle arm 58, and the link arm 60 is made of a heat insulating member, it is possible to prevent heat from being transmitted to the handle portion 57. Therefore, even when the male joint 50 is at a high temperature or a low temperature, the pipe joint can be easily attached and detached.

In addition, this embodiment can also be changed and implemented as follows.
-When the male joint 50 to which the female joint 51 is fixed is installed at a low position or a high position, the female joint 51 must be greatly bent or greatly extended when the female joint 51 is fixed and released. There is. Even in such a case, if the handle portion 57 is bent upward and downward with respect to the handle arm 58, the fitting and removal work can be performed without greatly bending or extending a hand. Can be done. For example, in the case of FIG. 4B, a handle portion 57a formed in a rod shape is attached to the tip of the handle arm 58a so as to be orthogonal to the handle arm 58a. In this case, the handle portion 57 can be moved in the vertical direction with respect to the central axis of the female joint body 52 by loosening the fastening of the handle portion 57a to the handle arm 58a by operating the adjusting portion 80. Has been. In FIG. 4C, the handle portion 57b is provided at the tip of the handle arm 58b so as to be bent vertically in the extending direction. In FIG. 4D, the U-shape is formed. One end of the handle portion 57c formed in the above is fixed to the handle arm 58c. 4 (e), the handle portion 57d formed in a substantially O-shape is fixed to the handle arm 58d, and the grip portion of the handle portion 57d is offset from the central axis of the female joint body 52. It is arranged to be provided at the position. As described above, the shape of the handle arm 58 or the handle portion 57 can be changed to a shape that is easy to use according to the use form of the pipe joint.

  In the above embodiment, the coil spring is used as the elastic body 65 that connects the two handle arms 58, but other elastic bodies such as rubber may be used. In any case, if an elastic force is applied to the handle arm 58, the operation force of the handle arm 58 for fixing and releasing the male joint and the female joint can be reduced, and the rotation of the handle arm 58 is restricted. It becomes possible to do.

  In the above embodiment, both handle arms 58 are directly connected by one elastic body 65, but both handle arms 58 may be connected to the female joint body 52 by the elastic body 65. That is, both handle arms 58 may be indirectly connected by an elastic body via the female joint body 52. Also in this case, an elastic force is applied to the handle arm 58 to reduce the operation force of the handle arm 58 for fixing and releasing the male joint 50 and the female joint 51, or to restrict the rotation of the handle arm 58. Can be.

  In the above embodiment, both the handle arms 58 are connected by the elastic body 65, but the handle for fixing and releasing the male joint 50 and the female joint 51 without applying an elastic force to the handle arm 58. The elastic body 65 may not be provided as long as the operation of the arm 58 and the rotation of the handle arm 58 can be accurately regulated.

  The length La from the fulcrum A61 to the fulcrum C63 may be shorter than the length Lb from the fulcrum B62 to the fulcrum D64, or the lengths La and Lb may be made equal. In such a case, the length La from the fulcrum A61 to the fulcrum C63 is longer than the length Lb from the fulcrum B62 to the fulcrum D64 to fix and release the female joint 51 with less force. The handle arm 58 can be turned.

  In the above embodiment, heat transfer to the handle portion 57 is suppressed by using at least one of the fixing arm 53, the handle arm 58, and the link arm 60 as a heat insulating member. When the male joint 50 is not hot or cold, or when the handle portion 57 itself is formed of a heat insulating member, the fixing arm 53, the handle arm 58, and the link arm 60 may all be non-heat insulating members.

  In the above embodiment, the case where the present invention is embodied as a cam arm type pipe joint has been described. However, the pipe joint of the present invention is configured to fix the female joint to the male joint by turning the fixing arm. Any pipe joint can be applied to any pipe joint.

  In the above-described embodiment, the case where the present invention is applied to a pipe joint used for installing the measurement probe 70 has been described. However, the pipe joint of the present invention can be used to install measurement equipment other than the measurement probe 70, It can be similarly applied to pipe joints used for other purposes such as connection of hoses and pipes.

  DESCRIPTION OF SYMBOLS 10 ... Male joint, 11 ... Female joint, 12 ... Female joint main body, 13 ... Fixing arm, 14 ... Base end part, 15 ... Cam nose, 16 ... Engagement part, 50 ... Male joint, 51 ... Female joint, 52 ... Female joint body, 53 ... Fixing arm, 54 ... Fixing arm proximal end, 55 ... Cam nose, 56 ... engaging portion, 57 ... handle portion, 58 ... handle arm, 59 ... handle arm proximal end, 60 ... link Arm 61, fulcrum A, 62 fulcrum B, 63 fulcrum C, 64 fulcrum D, 65 elastic body, 70 measuring probe, 80 adjusting unit.

Claims (7)

A tubular female joint main body into which a male joint is inserted from the distal end, and a pair of fixing arms each having a base end portion pivotally supported on the left and right sides of the distal end of the female joint main body, and In a pipe joint for fixing the male joint to the male joint according to the rotation of the fixing arm,
A handle portion serving as a handle is provided at the distal end, and a pair of handle arms each having a proximal end portion pivotally supported on the left and right sides of the rear end portion of the female joint body are provided. A pipe joint characterized in that the fixing arm is rotated in conjunction with movement. The pipe joint according to claim 1, further comprising a link arm that mechanically connects the handle arm and the fixing arm so that the fixing arm is rotated in conjunction with the rotation of the handle arm. In the pipe joint according to claim 2,
The length from the handle arm base end portion, which is the base end portion of the handle arm, to the connection portion of the handle arm with the link arm is the same as the length from the base end portion of the fixing arm, which is the base end portion of the fixing arm. A pipe joint characterized in that it is longer than the length of the fixing arm to the connecting portion with the link arm. In the pipe joint according to claim 2 or 3,
At least one of the fixing arm, the handle arm, and the link arm is made of a heat insulating member. In the pipe joint according to any one of claims 1 to 4,
The left and right handle arms are connected to each other by an elastic body at a position separated from the base end by a certain length. In the pipe joint according to any one of claims 1 to 5,
The said handle part is extended | stretched in the direction bent from the extending | stretching direction of the said handle arm. The pipe joint characterized by the above-mentioned. The pipe joint according to any one of claims 1 to 6, wherein the pipe joint is used for mounting a measurement probe.

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