JP3151615U - Fittings and fluid equipment - Google Patents

Abstract

The present invention provides a pipe joint having a cap having both a function of identifying a pipe joint according to use and a function of preventing unintended pipe removal due to an erroneous operation or the like. A guide cylinder 33, a release cylinder 34, and a cap 2 detachably provided on the release cylinder 34 are provided, and the release cylinder 34 is pushed by a set stroke length in the axial direction. In the pipe joint 1 from which the pipe is removed, the cap 2 has a substantially U-shaped upper surface plate 10 having an opening through which the pipe can enter in the radial direction, and a release cylinder 34 in the gap 37 can enter in the radial direction. A substantially U-shaped lower surface plate 20 having an opening, and the upper surface plate 10 and the lower surface plate 20 are connected to each other at their rear end portions with the opening directions coincided with each other. The release cylinder 34 in the gap portion 37 is detachably formed with a thickness not more than 37 in the axial direction and not less than the set stroke length. [Selection] Figure 4

Description

  The present invention relates to a pipe joint and a fluid device. More specifically, the present invention relates to a pipe joint characterized by a cap that is detachably provided on a release cylinder that is pushed when a pipe is pulled out, and a plurality of the pipe joints are provided. The present invention relates to a fluid device.

  Conventionally, pipe joints as disclosed in Patent Documents 1 and 2 have been put to practical use as pipe joints for connecting fluid devices and pipes. These pipe joints have a structure in which the pipe is removed by pushing the release cylinder toward the guide cylinder in the axial direction for a set stroke length.

  Here, in the pipe joint having the above-described structure, a removal prevention mechanism described in Patent Documents 3 to 6 is disclosed as a technique for preventing unintended removal of the pipe due to an erroneous operation or the like.

Japanese Unexamined Patent Publication No. 60-044683 Japanese Patent Laid-Open No. 2002-106762 Japanese Patent Laid-Open No. 9-045622 Special Table 2000-508416 JP 2002-286181 A JP 2007-120671 A

  With respect to pipe joints, it is required that unintended pipe removal due to erroneous operation or the like can be prevented, and that intended pipe removal can be easily performed. In particular, regarding a fluid device in which a large number of pipe joints are arranged in a concentrated manner, it is required that the pipe joints by application are highly discriminable and erroneous piping can be prevented.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a pipe joint including a cap having both a function of identifying a pipe joint according to use and a function of preventing unintended pipe removal due to an erroneous operation or the like.

  The present invention solves the above-mentioned problems by the solving means described below.

  This pipe joint is a cylindrical body into which a pipe is inserted in the axial direction, a release cylinder having a flange portion provided at one end thereof, and a guide cylinder that accommodates the release cylinder so as to be movable in the axial direction. A lock claw that digs into the outer wall of the pipe by pushing the release cylinder in the axial direction toward the guide cylinder for a set stroke length. In the pipe joint in which the pipe is pulled out by expanding the inner diameter of the pipe and releasing the bite, the cap has a substantially U-shaped top plate having a first opening through which the pipe can enter in the radial direction. And a substantially U-shaped bottom plate having a second opening through which the release cylinder can enter in a radial direction at a gap between the flange of the release cylinder and the end of the guide cylinder. The upper surface plate and the lower surface plate are aligned with each other in the opening direction. The lower surface plate is connected to the rear end portion, and is formed to have a thickness not more than the axial length of the gap portion and not less than the set stroke length, and can be attached to and detached from the release cylinder in the gap portion. It is a requirement to be formed.

  According to the present invention, it is possible to identify pipe joints according to applications, and to prevent unintended pipe removal due to erroneous operation or the like.

It is the schematic which shows the example of the pipe joint (cap | cap unattached state) which concerns on embodiment of this invention. It is the schematic which shows the example of the cap of the pipe joint which concerns on embodiment of this invention. It is the schematic which shows the example of the pipe joint (cap mounting state) which concerns on embodiment of this invention. It is the schematic which shows the halfway state and completion state which attach a cap to the pipe joint which concerns on embodiment of this invention. It is the schematic which shows the example of the fluid apparatus by which multiple pipe couplings (cap mounting state) which concern on embodiment of this invention were arrange | positioned.

The pipe joint 1 according to the present embodiment is a pipe joint for connecting a fluid device and a pipe. The structure and operation of the pipe joint 1 will be described with reference to FIG.
In the pipe joint 1, the guide cylindrical body 33 is fixed by engaging the engagement protrusion 33 a with the inner wall of the main body 31. Furthermore, a stopper 32 fixed in the guide cylinder 33 and a release cylinder 34 held in one end of the guide cylinder 33 so as to be movable in the axial direction are provided. The release cylinder 34 has a shape in which a flange portion 34b having an outer diameter larger than that of the cylindrical body 34a is provided integrally with the cylindrical body 34a on one end side of the cylindrical body 34a. The tube 50 is inserted into the circular hole 34c inside the cylindrical body 34a in the axial direction (in the direction of arrow A). Here, reference numeral 35 denotes a seal ring, and reference numeral 36 denotes a lock claw. In addition, although the main body 31 has mentioned the L-shaped structure as an example, it is not limited to this, Any shapes, such as a straight shape, may be sufficient. Further, the structure of the portion connected to the fluid device is not particularly limited.
Then, the effect | action of the pipe joint 1 is demonstrated. The pipe 50 connected to the pipe joint 1 is inserted from the circular hole 34 c of the release cylinder 34. Thereby, the lock claw 36 is spread outward by the tip of the tube 50, and the tip is placed on the outer peripheral surface of the tube 50. When the tube 50 is pulled in the removal direction in this state, the tip of the lock claw 36 bites into the outer wall of the tube 50, and the removal is prevented. Further, the pipe 50 and the pipe joint 1 are fitted into the seal ring 35 having an inner diameter smaller than the outer diameter of the pipe 50 using a rubber material, with the tip of the pipe 50 being fitted without a gap. The sealing performance is maintained.
On the other hand, when the tube is pulled out, the release cylinder 34 is pushed toward the guide cylinder 33 by the set stroke length in the axial direction, so that the tip of the release cylinder 34 expands the inner diameter of the lock claw 36. Thus, the biting of the lock claw 36 into the outer wall of the tube 50 can be released, and in this state, the tube 50 can be pulled out in the direction opposite to the insertion direction to be removed. Here, a gap portion 37 for pushing the set stroke length is provided between the flange portion 34 b of the release cylinder 34 and the end portion of the guide cylinder 33. The stopper 32 is for preventing the lock claw 36 from being excessively deformed.

Here, the cap 2 characteristic of the present embodiment is a cap having a structure that can be attached to and detached from the release cylinder 34 of the pipe joint 1. Specifically, as shown in FIG. 2 (FIG. 2 (a) is a perspective view, FIG. 2 (b) is a side view, and FIG. 2 (c) is a front view), the cap 2 has an opening (first A substantially U-shaped top plate 10 having one opening) 11. The opening 11 is formed with an inlet size and an opening area through which the pipe can enter in the radial direction. The cap 2 includes a substantially U-shaped bottom plate 20 having an opening (second opening) 21. The opening 21 is formed to have an inlet size and an opening area through which the release cylinder 34 in the gap 37 of the pipe joint 1 can enter in the radial direction. However, the inlet dimension (w1) of the opening 21 is a structure that allows the release cylinder 34 to enter by being elastically deformed and enlarged as will be described later.
The upper surface plate 10 and the lower surface plate 20 having the above-described shape have a structure in which the opening directions of the opening portions are made to coincide with each other and are connected at the respective rear end portions. In the present embodiment, the upper surface plate 10 and the lower surface plate 20 are integrally formed. At this time, the upper surface plate 10 and the lower surface plate 20 are arranged in parallel with an interval of the same dimension as the thickness of the flange portion 34b of the pipe joint 1 in the axial direction. Thus, when the lower surface plate 20 is mounted on the release cylinder 34 in the gap portion 37 of the pipe joint 1 (details will be described later), the flange portion 34b of the pipe joint 1 is interposed between the upper surface plate 10 and the lower surface plate 20. Since it can be made to enter in the radial direction (a direction orthogonal to the arrow A in FIG. 1), the upper surface plate 10 can be exposed outside in the axial direction from the end surface of the flange portion 34b. A perspective view of the state where the cap 2 is attached to the release cylinder 34 is shown in FIG.

  Here, the lower surface plate 20 is made of an elastically deformable material (synthetic resin material in the present embodiment), and the width w1 of the inlet portion 21a of the second opening 21 is a release cylinder in the gap portion 37 of the pipe joint 1. The outer diameter d1 of the body 34 is smaller than the outer diameter d1 (see FIG. 1), and the overall size of the opening 21 is substantially the same as the radial cross-sectional dimension of the release cylinder 34 in the gap portion 37 (see FIG. 2). c)). Thereby, the lower surface plate 20 can be detachably fixed to the release cylinder 34 in the gap portion 37 of the pipe joint 1 by snap-fit engagement.

  Furthermore, the lower surface plate 20 is formed to have a thickness not more than the axial length w2 of the gap portion 37 of the pipe joint 1 and not less than the set stroke length (≦ w2) described above. Accordingly, the lower surface plate 20 can be inserted into the gap portion 37 so that the release cylinder 34 is sandwiched by the opening 21 of the lower surface plate 20 at the position of the gap portion 37. 4A is a side view of the pipe joint 1 in a state where insertion of the lower surface plate 20 of the cap 2 (the upper surface plate 10 is also integrated) is started, and FIG. It is a side view of the pipe joint 1 in the state where insertion of the face plate 20 (the upper face plate 10 is also integral) is completed. As shown in FIG. 4B, in a state where the lower surface plate 20 is inserted into the gap portion 37, the release cylinder 34 is pushed toward the guide cylinder 33 by the set stroke length in the axial direction. It becomes impossible. That is, it is possible to prevent the tube from being pulled out due to the release cylinder 34 being pushed unintentionally due to an erroneous operation or the like.

  On the other hand, the upper surface plate 10 is formed with the first opening 11 so that there is no portion that closes the circular hole 34 c in a state where the lower surface plate 20 is mounted on the release cylinder 34 of the pipe joint 1. Thereby, a pipe | tube can be inserted in the pipe joint 1 (circular hole 34c) in the state which attached the cap 2 to the pipe joint 1 (release cylinder 34). Conversely, the cap 2 can be attached to the pipe joint 1 (release cylinder 34) with the pipe inserted into the pipe joint 1 (circular hole 34c).

  Further, the upper surface plate 10 has an upper surface 10a colored for identification. The coloring may be applied only to the upper surface 10a or the entire cap 2. As described above, when the cap 2 is attached to the pipe joint 1 (release cylinder 34), the upper surface 10a of the upper surface plate 10 is more axial than the end surface of the flange portion 34b (the end surface on the side where the tube is inserted). Although the effect | action exposed to the outer side (side into which a pipe | tube is inserted) arises, it becomes possible to identify the pipe joint 1 by attaching | subjecting the coloring for identification to the upper surface 10a. In particular, as shown in FIG. 5, with respect to a fluid device 3 in which a plurality of pipe joints 1 are provided side by side, when inserting a pipe, exchanging a pipe in the middle of use, or changing a connection position, the pipe is misplaced. The effect which can prevent connecting with the coupling 1 arises. Alternatively, the cap 2 according to this embodiment can be attached to and detached from the pipe joint 1 (release cylinder 34) even when the pipe is inserted into the pipe joint 1 (still fixed). When changing the passage fluid without changing the pipe connection, simply remove the colored cap 2 corresponding to the fluid before the change and attach the colored cap 2 corresponding to the fluid after the change. It is also possible to easily change the coloring for identification (that is, change of the cap 2) accompanying the change of the fluid.

Further, the upper surface plate 10 and the lower surface plate 20 (that is, the cap 2) have a maximum width w3 (see FIGS. 2C and 3) in the direction orthogonal to the direction in which the pipe or the release cylinder 34 enters, and the flange portion in the same direction. It is formed below the maximum width w4 of 34b (see FIG. 3). Thereby, also in the fluid apparatus 3 (refer FIG. 5) by which the several pipe joint 1 is provided in parallel and adjacent flange part 34b is arrange | positioned by a micro clearance gap (greater than 0 mm and about 1 mm or less). The cap 2 can be attached to the release cylinder 34 of each pipe joint 1.
As described above, the cap 2 according to the present embodiment exhibits both the function of identifying the pipe joint 1 by color according to the use, and the function of preventing unintended pipe removal, particularly in a location where a large number of pipes are concentrated. It has a remarkable effect in that it can be done.

Furthermore, as shown in FIG. 2A and the like, the upper surface plate 10 includes a protruding portion 12 that stands on the upper surface 10a in the axial direction.
As a result, the protrusion 12 can be pulled out with a tool or a finger, so that the operation of removing the cap 2 from the pipe joint 1 can be easily performed. As a result, the intended tube can be easily removed. In particular, in a fluid device 3 in which a large number of pipe joints 1 (flange portions 34b) as shown in FIG. 5 are juxtaposed at a minute gap interval, the structure in which the protrusions 12 stand on the upper surface 10a is desired. Only the cap 2 can be easily removed.

  As described above, according to the present invention, it is possible to prevent unintentional removal of a tube due to an erroneous operation or the like and to easily perform intended removal of the tube. In particular, in a fluid device in which a large number of pipe joints are concentrated, the discriminability of pipe joints according to applications can be improved, and an effect of preventing erroneous piping is produced.

  Needless to say, the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Pipe joint 2 Cap 3 Fluidic device 10 Upper surface plate 11 Upper surface plate opening 12 Projection portion 20 Lower surface plate 21 Lower surface plate opening 31 Main body 32 Stopper 33 Guide cylinder 34 Release cylinder 35 Seal ring 36 Lock claw 37 Gap 50 tubes

Claims (5)

An open cylinder in which a tube is inserted in the axial direction and a flange is provided at one end, a guide cylinder that accommodates the open cylinder so as to be movable in the axial direction, and the open cylinder And an inner diameter of the lock claw that bites into the outer wall of the pipe by pushing the release cylinder in the axial direction toward the guide cylinder in the axial direction. In the pipe joint where the pipe is pulled out by releasing the bite,
The cap includes a substantially U-shaped top plate having a first opening through which the pipe can enter in a radial direction, and a gap portion between a flange portion of the release cylinder and an end of the guide cylinder. A substantially U-shaped bottom plate having a second opening that allows the release cylinder to enter in a radial direction;
The upper surface plate and the lower surface plate are connected to each other at their rear end portions with the opening directions being matched.
The lower surface plate is formed to have a thickness not more than the axial length of the gap and not less than the set stroke length, and is detachably formed on the release cylinder in the gap. Pipe fittings. The upper surface plate is formed with the second opening so that there is no portion blocking the circular hole in a state where the lower surface plate is mounted on the release cylinder, and at least the upper surface is colored for identification. A pipe joint characterized by being attached. 2. The upper surface plate and the lower surface plate have a maximum width in a direction orthogonal to an approach direction of the pipe or the release cylinder, which is equal to or less than a maximum width of the flange portion in the same direction. 2. The pipe joint according to 2. The pipe joint according to any one of claims 1 to 3, wherein the upper surface plate includes a protruding portion erected on the upper surface in the axial direction. A fluid device, wherein a plurality of the pipe joints according to claim 1 are provided in parallel.

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