JP2601578Y2 - Joint for built-in electric wire tube and connection structure using the same - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint for a tube in which transfer of a fluid such as air and transmission and reception of an electric signal are integrated, and a connection structure between the joint and the tube.

[0002]

2. Description of the Related Art In recent years, systems for transferring fluids have become more complicated and intelligent, and are not limited to merely transferring fluids. In other words, various tubes and joints for the tubes have been developed which transfer an electric signal together with a fluid through the same pipe. As such a tube or a joint, for example, Japanese Utility Model Laid-Open No. 3-136
As described in Japanese Patent Application Publication No. 70-70, etc., there is known a device capable of simultaneously connecting a fluid path and an electric circuit between a tube and a joint. These tubes have a fluid path at the center and electric wires at the outer periphery, and the joint has a fluid path connection at the center and connection terminals at the outer periphery. In the structures described in these publications, when connecting the joint to the tube, the outer tube forming the outer shell and the inner tube forming the fluid path are cut at different positions, and the inner tube projects axially from the outer tube. Is done. The inner tube is externally connected to the protruding connection port, and the connection terminal is cut into the electric wire from the outer periphery thereof.

[0003]

However, in the above-mentioned conventional structure, since the tube can be attached to the joint at any rotational position, it is difficult to make the wires correspond to the connection terminals. . Moreover, it has not been possible to immediately determine whether or not the wire and the connection terminal are correctly connected.

The present invention has been made in view of the above circumstances, and its purpose is to easily arrange a wire and a terminal when attaching a tube to a joint, so that accurate connection work can be simplified. To provide a tube with a built-in electric wire and a joint thereof.

[0005]

In order to achieve the above object, in the invention according to the first aspect, a concave portion for inserting and connecting a wire-containing tube is formed in a joint body, and a wire-containing tube is formed in the concave portion. in the wire internal fitting for tubes wire provided with terminals connected, the shape of the recess formed in an oval cross section corresponding to the shape of the formed wire built tube oval cross section, the wire internal tube Are inserted into the concave portion in a predetermined direction, and further, the bottom portion of the concave portion is formed in a tubular shape from the bottom portion toward the opening, and the electric wire built-in tube is inserted when the electric wire built-in tube is inserted. A fluid passage connecting portion sandwiched between the fluid passages, the terminals are provided on both sides of the fluid passage connecting portion, and the sectional shape of the concave portion when viewed from the opening side of the concave portion. Oval wire internal tube fittings arranged so as to be asymmetrical with respect to the long side and its gist.

In the invention according to claim 2, a connection tube is inserted and connected to a concave portion formed in the joint body, and a wire of the cable internal tube is connected to a terminal provided in the concave portion. In the structure, the shape of the concave portion is formed in an oval cross section , and the wire-containing tube is formed in an oval cross section corresponding to the shape of the concave portion, and the wire-containing tube is inserted into the concave portion in a predetermined direction. And a fluid passage formed in the bottom of the concave portion so as to protrude in a cylindrical shape from the bottom toward the opening and inserted into the fluid passage of the wire-containing tube when the wire-containing tube is inserted. the connection portion is provided, the terminal, with respect to the oval <br/> long side of which is concave in cross section when viewed from the opening side of the recess is provided on both sides sandwiching the fluid passage connecting portion It is arranged so as to be symmetrical, and the electric wire of the electric wire built-in tube is provided according to the position of the terminal, and the position of the electric wire of the electric wire built-in tube inserted into the concave portion is the position of the terminal provided in the concave portion. The gist of the present invention is a connection structure in which the tube with a built-in electric wire can be inserted and connected into the recess only when it matches.

Therefore, in the invention according to claim 1 and claim 2, the tube with a built-in electric wire having an oblong cross section is inserted into the concave portion of the joint body. At this time, when the tube with a built-in wire is inserted with its center axis inverted, the wires of the tube with a built-in wire and the terminal provided in the recess do not coincide with each other. Can not.
Therefore, unless the electric wire built-in tube is inserted into the concave portion in a normal state, the electric wire is not connected to the terminal. As a result, when it is necessary to distinguish the correspondence between the electric wires and the terminals provided on both sides of the fluid passage, the erroneous connection is prevented.

[0008]

BRIEF DESCRIPTION OF devised will be described below an embodiment embodying this invention with reference to FIGS. 1 to 7. The joint main body 3 is made of a synthetic resin material, and has a joint concave portion 4 as a concave portion formed in a central portion in an oval cross section . A nipple 5 is fitted to the joint body 3 so as to be located at the center of the joint recess 4. The nipple 5 forms a fluid passage connecting portion that projects in a cylindrical shape. The joint-side fluid passage 6 penetrates through the nipple 5, is drilled in the joint body 3, and communicates with the lower end surface of the body. A seal ring 7 is fitted around the distal end of the nipple 5. In the vicinity both sides of the nipple 5, (consisting of the contact pins 18 and the lead terminal 19) a plurality of lead pins 8 are electrical connection terminals fitting recess
4 is asymmetric with respect to the long side of the oval which is the cross-sectional shape
And protrudes in the same direction as the nipple 5. A step is formed in the insertion opening 9 of the joint body 3, and the step has an elliptical claw 10 having protruding teeth as shown in FIG. 4.
Are also fixed by an oval fixed cylinder 11. The fixed cylinder 11 has an oval open cylinder 12 with a joint recess 4.
Is movably inserted in the direction of the central axis. Open cylinder 12
Has a tapered portion 13 formed at one end thereof, which faces the claw 10.

On the other hand, the electric wire built-in tube 1 (hereinafter, referred to as a tube) is made of a synthetic resin material and has an oval cross section as shown in FIG. A fluid conduit 14 as a fluid passage is formed in the center of the inside of the tube 1, and a tubular conductive wire 15 as an electric wire is embedded and fixed to both sides thereof. This
The annular conductive wire 15 corresponds to the position of the lead pin 8.
So that the long side of the oval which is the cross-sectional shape of the tube 1
They are arranged so as to be asymmetric with respect to each other. Note that the tubular conductive wire 15 may be a conductive plastic. Alternatively, as shown in FIG.
The linear conductors 17 and 17a may be embedded on the circumference of 6, 6a, that is, on the annular surface . Also a fluid line 1
4 need not be one Hatada, even several fluid passage 14 is formed as shown in FIG. Similarly, a plurality of the tubular conductive wires 15 of FIG. 5 are also provided, but the arrangement thereof is asymmetric with respect to the long side of the ellipse described above.
So that

Next, the operation of the present embodiment will be described. To connect the tube 1 cut at an arbitrary position to the joint 2, first, the cut end of the tube 1 is inserted into the joint recess 4. At the time of this insertion, since the tube 1 and the joint concave portion 4 are oblong, the tube 1 is allowed to be inserted into the joint 2 only in a predetermined direction. Therefore, the contact pin 18 which is the tip of the nipple 5 and the lead pin 8 is automatically inserted into the fluid conduit 14 and the tubular conductive wire 15 of the tube 1, respectively. By pulling the tube 1 in the direction opposite to the insertion direction after insertion, the claw 10 disposed on the inner wall of the insertion port 9 and fixed to the fixed cylinder 11
The biting tube 1 is held on the outer periphery of the tube. In this state, the inner peripheral surface of the fluid conduit 14 and the outer peripheral surface of the nipple 5 are sealed by the seal ring 7.

Accordingly, the fluid conduit 14 of the tube 1 is connected to the fluid passage 6 on the joint side of the joint 2, and the tubular conductive wire 15 and the contact pin 18 are electrically connected. Open tube 12 to separate tube 1 from joint 2
May be pushed into the joint side. As a result, the tapered portion 13 at the tip pushes and spreads the claw 10 biting into the tube 1, and the claw 10 no longer holds the tube 1. At this time, the tube 1 is easily pulled out from the joint 2 by pulling the tube 1 in a direction opposite to the pushing direction of the open cylinder 12.

As described above, in the present embodiment, when connecting the joint 2 and the tube 1, the nipple 5 and the lead pin 8 are connected to the fluid conduit 14 and the tubular conductive wire 15 of the tube 1 in the joint 2. It is only inserted. Therefore, unlike the related art, it is not necessary to cut the tube 1 at two places, but only at one place, and further, a member for holding the conductive wire 15 is not required. For this reason, the tube 1 can be easily cut and the number of parts is reduced, and as a result, the connection and assembling of the joint 2 and the tube 1 becomes extremely simple. In addition, as described above,
Since the connection can be made by cutting at the location, the fluid line 14 and the tubular conductive wire 15 of the tube 1 do not match the positional relationship and dimensions between the nipple 5 and the lead pin 8 of the joint 2. Therefore, there is no problem of fluid leakage or poor conductivity.

Furthermore, the joint recess 4 and the tube 1 of the joint 2 are both formed in an oblong shape, and the tube 1 can be inserted into the joint recess 4 only in a predetermined direction.
Electrical connections are made automatically.

Further, when the tube 1 and the joint 2 are disengaged from each other, it is only necessary to push the open tube 12 and pull out the tube 1, and the operation can be easily performed. In addition, as shown in FIG. 3, FIG. 5 and FIG.
8 and the tubular conductive wire 15 are asymmetric with respect to the long side of the oval.
So that the tube 1 is at its center
It is inserted into the joint recess 4 in a state where it is turned around the axis.
Then, the positions of the tubular conductive wire 15 and the lead pin 8 coincide with each other.
Cannot connect them. Therefore,
If the tube 1 is not inserted normally,
15 is not connected to the lead pin 8. As a result, the fluid pipe
A tubular conductive wire 15 and a lead pin provided on both sides of a path 14
When it is necessary to distinguish the correspondence with
Incorrect connection is prevented.

[0015]

As described in detail above, in any of the inventions according to the claims, when attaching the tube to the joint, the correspondence between the electric wire and the terminal provided on both sides of the fluid passage is required .
Prevents misconnections when relationships need to be distinguished from each other
Since the connection is stopped, there is an effect that extremely accurate connection work can be performed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a connection state of an electric wire built-in tube and a joint according to an embodiment.

FIG. 2 is a cross-sectional view showing a connection state of a tube with a built-in electric wire and a joint.

FIG. 3 is a front view of a joint.

FIG. 4 is a front view of a nail.

FIG. 5 is a cross-sectional view showing another example of the electric wire built-in tube.

FIG. 6 is a cross-sectional view showing another example of the electric wire built-in tube.

FIG. 7 is a sectional view of a tube with a built-in electric wire.

[Explanation of symbols]

A tube 1 with a built-in electric wire, a joint main body 3, a joint concave portion 4 as a concave portion, a lead pin 8 as a terminal, and a tubular conductive wire 15 as an electric wire.

Claims (2)

(57) [Scope of request for utility model registration] 1. A joint body (3) having a recess (4) into which an electric wire built-in tube (1) is inserted and connected, and an electric wire (15) of the electric wire built-in tube (1) is formed in the concave portion (4). in wire internal fitting for tubes having a connected thereto terminal (8), the shape of the recess (4), formed in an oval cross section corresponding to the shape of the wire internal tube formed in an oval cross section (1) Then, the electric wire built-in tube (1) is inserted into the concave portion (4) in a predetermined direction, and further, the bottom of the concave portion (4) is formed in a cylindrical shape so as to project from the bottom toward the opening. Then, when the electric wire built-in tube (1) is inserted, a fluid passage connecting portion (5) is provided which is inserted into the fluid passage (14) of the electric wire built-in tube (1). It is provided on both sides of the fluid passage connecting portion (5), and Part (4) wire internal tube fittings arranged so as to be asymmetrical with respect to oval long side which is the cross-sectional shape of the recess (4) when viewed from the opening side of the. 2. A recess (4) formed in the joint body (3).
The tube with built-in electric wire (1) is inserted and connected to
In the connection structure in which the electric wire (15) of the electric wire built-in tube (1) is connected to the terminal (8) provided in the concave portion (4), the shape of the concave portion (4) is formed to have an oval cross section. At the same time, the electric wire built-in tube (1) is formed into an oval cross section according to the shape of the concave portion (4) so that the electric wire built-in tube (1) is inserted into the concave portion (4) in a predetermined direction. Furthermore, a fluid passage of the electric wire built-in tube (1) when the electric wire built-in tube (1) is inserted into the bottom of the concave portion (4) when the electric wire built-in tube (1) is inserted and formed in a cylindrical shape from the bottom toward the opening. (14), a fluid passage connecting portion (5) is provided, the terminals (8) are provided on both sides of the fluid passage connecting portion (5), and an opening side of the recess (4). The long side of the oval , which is the cross-sectional shape of the recess (4) when viewed from the And the terminal (8)
The electric wire (15) of the electric wire built-in tube is provided in accordance with the position of the electric wire built-in tube, and the position of the electric wire (15) of the electric wire built-in tube (1) inserted into the concave portion (4) is provided in the concave portion (4). A connection structure in which the electric wire built-in tube (1) can be inserted and connected into the recess (4) only when the position matches the position of the terminal (8).