JP2011002070A - Connecting device for pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To be configured such that when an elastic holding part is slipped out from a holding groove part with an external force acted thereon, the elastic holding part is elastically held on a next slipping-out preventing recess holding groove part and have an effect of slipping-out prevention when the external force is repeatedly acted.SOLUTION: One end of a removal prevention member 9 is attached to a guide part 8c freely rotatably and another end is hooked on another side of the guide part in such a way that the interval between the ends of the guide part is not spread to be larger than or equal to a diameter of the periphery except flanges of both two connection parts of two pipes while a pair of interposing parts 8a mutually abut on the periphery of both the connection parts 3 and 4 of the two pipes 1 and 2 from a reverse direction.

Description

  The present invention relates to a pipe joint provided at a connection portion of various pipes, and particularly relates to a pipe connection apparatus capable of preventing inadvertent detachment.

  Conventionally, in order to deliver gas and liquid inside and outside the equipment, piping for delivering them is made. However, there is a connection part inside the equipment or with a part or device outside the equipment, that is, a pipe connection device. I need it. In view of this, there has been proposed a joint configuration in which the piping is reliable and the connecting portion is not inadvertently detached (see, for example, Patent Document 1).

  For example, in Patent Document 1, as shown in FIG. 4, a guide taper portion 104 whose diameter increases toward the rear side is provided on a cylindrical plug 101 and a locking groove portion 105 is provided at the rear portion of the guide taper portion 104. Yes. A cut groove 106 that opens to the inside and outside of the socket 102 is provided in the wall portion of the cylindrical socket 102, and a substantially U-shaped spring ring 107 that is inserted into the cut groove 106 across the socket 102 from the outside of the socket 102 is provided. Provided. A portion of the spring ring 107 inserted into the groove 106 is inserted into the socket 102 from the groove 106 to form an elastic locking portion 108, and the spring ring 107 is inserted into the locking groove 105 of the plug 101 inserted into the socket 102. The elastic locking portion 108 is locked. In this way, the plug 101 is connected only by being inserted into the socket 102.

Japanese Patent No. 2595421

  However, in the conventional configuration, in the pipe joint in which the tubular plug 101 is fitted and connected to the cylindrical socket 102 in the pipe joint, the locking groove 105, the cut groove 106, and the socket 102 from the outside of the socket 102 are connected. An approximately U-shaped spring ring 107 is provided to be inserted into the kerf 106 across the groove, and a portion of the spring ring 107 inserted into the kerf 106 is inserted into the socket 102 from the kerf 106 to be elastically engaged. The stopper 108 is configured such that the elastic locking portion 108 of the spring ring 7 is locked to the locking groove 105 of the plug 101 inserted into the socket 102.

  According to the conventional example having the above-described configuration, there is a problem that the shape of the socket portion 102 complicates part processing such as taper processing and kerf processing, and increases the part cost.

  In addition, an arc-shaped elastic locking portion 108 in which the opposing portions are concave is provided on the opposing portions of both leg portions 109 of the substantially U-shaped spring ring 107, and the elastic locking portions 108 of the both leg portions 109 are provided. As a configuration in which the arcuate retaining concave portion 110 having a concave portion facing each of the front portions is provided, even if some external force acts after connection and the elastic locking portion 8 is pulled out from the locking groove portion 105, When the elastic locking portion 108 is pulled out, the next recessing concave portion 110 is elastically locked in the locking groove portion 105 to prevent the spring ring 107 from being further pulled out. Although the connection with the spring 101 is continued, there is a problem in the effect of preventing the spring ring 107 from coming off when the external force repeatedly acts on the spring ring 107.

  SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described conventional problems, and to provide a configuration in which a joint portion of a pipe does not come off even when an external force is repeatedly applied with a simple configuration.

  The present invention is a pipe connection device that connects two pipes at their respective end connection parts and fixes the connection parts of the two pipes so as not to be separated by a fastener. The leaf spring has a cutout hole formed so as to prevent the flanges provided at the connection portion of the pipe from separating from each other, and the two flanges of the pipe are accommodated in the cutout hole. One end of the detachment preventing member is pivotally fixed to one end of the fastener, and the other end of the detachment preventing member can be hooked or removed from the other end of the fastener. After inserting the two flanges of the connecting portion into the cutout hole of the fastener so that the connecting portion is not separated, the end portion of the disengagement prevention member that is not the pivot shaft is hooked on the other end side of the leaf spring. As described above, the interval between the end portions of the spring portions is configured not to be larger than the diameter of the outer periphery excluding the flanges of both the connection portions of the two pipes.

  As a result, since the leaf spring does not come off from the connecting portion, it is possible to provide a pipe joint device that does not come off even when external force is repeatedly applied.

  The pipe joint device of the present invention can provide a pipe joint device that does not come off even if it is repeatedly subjected to external force with a simple configuration.

Sectional drawing of the piping axial direction of the piping connection apparatus which concerns on Embodiment 1 of this invention (A) Aa sectional view in Drawing 1 of a pipe connection device concerning Embodiment 1 of the present invention (b) Perspective view showing a fastener of a pipe connection device concerning Embodiment 1 of the present invention. Sectional drawing for operation | movement description which attaches the fastener of the connection apparatus of piping which concerns on Embodiment 1 of this invention (A) Exploded perspective view showing a state before connection in a conventional pipe connection device (b) Cross-sectional view showing a spring ring in a conventional pipe connection device

In the present invention, two pipes are connected to each other at the ends, and the two pipes are fixed so as not to be separated by a fastener. The connecting portions of the two pipes each have a flange on the outer peripheral surface at the tip, and the fastener prevents a leaf spring surrounding both outer circumferences of the connecting portions of the two pipes and the leaf spring from spreading. It consists of an anti-detachment member. The leaf spring includes a pair of sandwiching portions each having a substantially arc-shaped cross section perpendicular to the tube axis that contacts the outer circumferences of both the connection portions of the two pipes from opposite directions, and a cross section perpendicular to the tube axis. A connecting portion in which both ends are connected to one end of the pair of sandwiching portions and one end is connected to the other end of the pair of sandwiching portions and the one end is connected to the other end of the sandwiching portion. The guide portion connected to the other end of the clamping portion in a state where an external force is not applied to the leaf spring, the guide portion having a substantially C-shaped cross section perpendicular to the tube axis narrower than the distance between the other ends The distance between the one ends of the two pipes is smaller than the diameter of the outer periphery excluding the flanges of both the connection portions, and a portion of the connecting portion on the holding portion side and a portion of the guiding portion on the holding portion side The two pipes are connected to each other between the connection portion and a part and the clamping portion. In the state, the flanges of the two pipes enter, and the flanges of the two pipes have cutout holes formed to prevent the flanges from separating from each other, and one end of the disengagement prevention member is rotatable. The other end of the detachment prevention member can be hooked on or removed from the other end side of the other guide portion. When the other end of the disengagement preventing member is hooked on the other end side of the guide portion in a state in which the holding portion of the two pipes is in contact with the outer circumferences of both the connection portions of the two pipes from opposite directions, the holding portion The distance between the one ends of the guide portions connected to the other end of the two pipes does not extend beyond the diameter of the outer periphery excluding the flanges of both the connection portions of the two pipes.

  Therefore, the fastener is not detached from the connection portion, and the connection between the pipes is reliably maintained.

  In addition, since the plate spring and a detachment preventing member that prevents the plate spring from spreading are formed, one end of the detachment prevention member is pivotally fixed to the other end side of one of the guide portions. Even if it is removed from the piping section, the leaf spring and the detachment preventing member maintain an integrated configuration, so that there is no risk of loss and efficiency in maintenance work can be achieved.

  Further, the slip-off preventing member can be formed by bending a spring wire. In this case, a mold is not required and the disengagement preventing member can be configured at a lower cost.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the present embodiment.

(Embodiment 1)
First, the configuration of a pipe connection device according to an embodiment of the present invention will be described in detail with reference to the drawings.

  1, 2 (a), and 2 (b), two pipes 1 and 2 are connected by connecting portions 3 and 4 at their respective ends, and the connection of the two pipes by a fastener 5. It is a pipe connection device that fixes parts so as not to leave each other. The connection part connection part 3 and the connection part 4 of the two pipes 1 and 2 respectively have a flange 6 and a flange 7 on the outer peripheral surface of the tip. Yes. The fastener 5 includes a leaf spring 8 that surrounds both outer peripheries of the connection portions of the two pipes, and a detachment prevention member 9 that prevents the leaf spring 8 from spreading.

  The leaf spring 8 has a pair of sandwiching portions 8a each having a substantially arc-shaped cross section perpendicular to the tube axis that abuts the outer circumferences of both the connection portions of the two pipes from opposite directions, and a cross section perpendicular to the tube axis. An approximately U-shaped connecting portion 8b whose both ends are connected to one end of the pair of sandwiching portions 8a, and one end is connected to the other end of the pair of sandwiching portions 8a and connected to the other end of the sandwiching portion 8a. The section perpendicular to the tube axis is narrower than the distance between the other ends, and the guide section 8c has a substantially C-shaped cross section. In the state where no external force is applied to the leaf spring 8, the holding section 8a An interval between the one ends of the guide portion 8c connected to the other end is narrower than an outer diameter of the two pipes except for the flange 6 and the flange 7 of the connection portion 3 and the connection portion 4, and the connection. A portion of the portion 8b on the clamping portion 8a side and the guidance portion 8c The flange 6 and flange of each of the two pipes 1 and 2 in a state where the two pipes are connected to the clamping part 8a and a part of the clamping part 8a with the connection part 3 and the connection part 4 connected to each other. 7 and a cutout hole 8d formed to prevent the flanges of the two pipes from being separated from each other, and one end of the disengagement prevention member 9 is pivotable. The other end of the disengagement prevention member 9 is fixed to the other end side, and can be hooked on or removed from the other end side of the other guide portion 8c, and a pair of the sandwiching portions 8a When the other end of the disengagement prevention member 9 is hooked on the other end side of the guide portion 8c in a state in which the outer ends of both of the connection portions of the two pipes are in contact with each other in opposite directions, the other of the holding portion Said invitation connected to the end One end interval between the parts 8c is the connecting portion 3 of the two pipes, not spread more than the diameter of the outer periphery except for the flanges of both the connecting portions 4.

Here, the pipe 1 is fixed to the connection part 3 by a holding part 1 a that projects the pipe 1 facing the groove 3 a provided on the inner surface of the connection part 3. Similarly, the pipe 2 is fixed to the connection part 4 by a holding part 2 a that projects a part of the pipe 2 facing the groove 4 a provided on the inner surface of the connection part 4.

  The tip of the pipe 1 is crushed to form an O-ring stopper 1b larger than the outer shape of the pipe 1, and an O-ring 10 is held between the connecting part 3 and the O-ring stopper 1b.

  The tip of the connecting portion 3 holding the O-ring 10 is fitted into the connecting hole 4 b of the connecting portion 4 to make a connection, and the O-ring 10 seals the connecting portion.

  Further, the attachment of the fastener 5 in FIG. 3 will be described below.

  FIG. 3 is a cross-sectional view (a-a cross-sectional view of FIG. 1) of the pipe of the present invention in a direction perpendicular to the axis. When the end of the connection portion 3 is completely fitted into the connection hole 4b, the flange 6 and the flange 7 are in a state of being close to each other in a plane perpendicular to the axis of the pipe, and the guide portion 8c of the fastener 8 is connected to the connection portion. 3. When the connecting portion 4 is brought into contact with the connecting portion 4 and the connecting portion 3 and the connecting portion 4 are pushed into the holding portion 8a (the pressing direction in FIG. 3), the cutout hole 8d enters the flange 6 and the flange 7 and the holding portion 8a inserts the flange. 6 and the flange 7 are held close to each other. When the outer shape of the connecting portion 3 and the connecting portion 4 and the sandwiching portion 8a are aligned, the attachment of the fastener 8 is completed.

  Further, the detachment preventing member 9 is shaped at one end into a ring-shaped end portion 9a and is rotatable about the guiding portion 8c. The other end of the detachment preventing member 9 is formed into a V-shaped end portion 9b. The disengagement prevention member 9 is rotated after the above-described attachment of the fastener 8 is completed, and the V-shaped end portion 9b is hooked on the guide portion 8c to be in the state shown in FIG.

  Since the gap between the guide portions 8c is held by the detachment preventing member 9, the fastener 8 is held by the connecting portion 3 and the connecting portion 4 even when an external force reverse to the pushing direction of the fastener 5 is applied, and the clamping portion 8a of the leaf spring 8 is held. Will not open and the fastener 5 will not fall off.

  The pipe connection device according to the present invention relates to a pipe connection device in equipment, facilities and the like, and can ensure connection with a simple configuration.

DESCRIPTION OF SYMBOLS 1, 2 Piping 3, 4 Connection part 5 Fastener 6,7 Flange 8 Leaf spring 8a Clamping part 8b Connection part 8c Guide part 8d Cutout hole 9 Detachment prevention member

Claims (1)

It is a pipe connection device that connects two pipes at the connection parts at their respective ends, and fixes the connection parts of the two pipes so as not to be separated from each other by a fastener, wherein the connection parts of the two pipes are Each of the fasteners has a flange on the outer peripheral surface of the tip, and the fastener includes a plate spring that surrounds the outer periphery of both of the connection portions of the two pipes, and a detachment preventing member that prevents the plate spring from spreading. The spring has a pair of sandwiching portions whose cross section perpendicular to the tube axis is in contact with the outer circumferences of both the connection portions of the two pipes from opposite directions, and a cross section perpendicular to the tube axis is substantially U-shaped. And a gap between the one end connected to the other end of the pair of holding parts and one end connected to the other end of the holding part. The cross section perpendicular to the tube axis is narrower than the distance between the ends. In the state where an external force is not applied to the leaf spring, the distance between the one ends of the guide portions connected to the other end of the clamping portion is both the connection portions of the two pipes. The diameter of the outer periphery excluding the flange is narrower, the part of the coupling part on the side of the clamping part, the part of the guiding part on the side of the clamping part, and the clamping part, the two pipes are connected to each other And the flanges of the two pipes are inserted into the flanges, and the flanges of the two pipes are formed to prevent the flanges from separating from each other. It is rotatably fixed to the other end side of one of the guide portions, and the other end of the detachment preventing member can be hooked on the other end side of the other guide portion or removed from the guide portion. Yes, one When the other end of the disengagement preventing member is hooked on the other end side of the guide portion in a state in which the holding portion of the two pipes is in contact with the outer circumferences of both the connection portions of the two pipes from opposite directions, the holding portion An apparatus for connecting pipes, wherein an interval between the one ends of the guide part connected to the other end of the pipe does not extend beyond the diameter of the outer periphery excluding the flanges of both the connection parts of the two pipes.