JPH0510497Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a connector for connecting flexible tubes for protecting electric wires, for example.

[Prior art]

For example, when wiring electric wires, the wires are passed through a flexible tube in order to protect the wires. In this case, if the length of the flexible tube is shorter than the length of the electric wire, it is necessary to join the flexible tubes together. Conventionally, vinyl tape has been used as a means for adding parts.

[Problem that the invention aims to solve]

However, when connecting with vinyl tape, it takes time and effort to wrap it around the flexible tube, and the connection strength is insufficient, so that when a tensile force is applied to both connected flexible tubes, the wrapped The vinyl tape may peel off. Furthermore, when the two connected flexible tubes are to be separated from each other, it takes time and effort to peel off the vinyl tape.

The present invention was developed in view of this fact, and it not only makes it possible to easily connect flexible tubes, but also prevents the flexible tubes from being accidentally pulled with a large force once they are connected. Although it exhibits the effect of not coming off easily even when the pipe is installed, it is also extremely easy to remove the flexible pipe from the connector, and it also prevents foreign substances such as ready-mixed concrete from entering the flexible pipe during construction. The purpose of this invention is to provide a connecting device for connecting flexible tubes.

[Means for solving problems]

In order to achieve the above object, a connector for connecting flexible tubes according to the present invention is composed of a cylindrical body and a pair of connecting bodies respectively fitted into openings at both ends of the cylindrical body. an annular portion that can be fitted into the cylindrical body; and a plurality of arm portions that are integrally formed with the annular portion at intervals in the circumferential direction and whose tips are inserted deep into the cylindrical body. ,
An engaging portion is formed on the inner surface of each of the arm portions, and an engaging portion is formed on the inner surface of the arm portion and protrudes outward, and the tip surface is inclined from the outer circumferential side to the inner circumferential side toward the respective annular portion. and a claw part that fits into the valley of a flexible tube inserted into the connecting body, while the cylindrical body has its peripheral wall engaged by each engaging part formed on the arm part of each of the connecting bodies. A plurality of engagement holes are bored, and an inner wall surface located at intervals in the circumferential direction of these engagement holes is bulged, and the inner diameter of the inner wall surface is inserted and connected through each connecting body. A tube support portion is formed that is slightly larger than the outer diameter of the tube, and is provided on the inner wall on the center side of each engagement hole, covering the entire circumference of the flexible tube to be inserted into the cylindrical body. Further, when the engaging portion engages with the engaging hole, the arm portion is formed with a gap in the peripheral wall between the opening in the cylindrical body and the engaging hole. The distal end surface of the engaging portion is loosely fitted, and when the engaging portion is engaged with the engaging hole, the distal end surface of the engaging portion is opposed to the inner surface on the center side of the engaging hole.

[Effect]

With the above configuration, when both connecting bodies are fitted into the openings at both ends of the cylindrical body, the troughs of each flexible tube can be easily inserted by simply inserting the two flexible tubes into each connecting body. The claws of each connecting body fit into the openings, allowing the flexible tubes to be connected to each other. On the other hand, by pressing the annular part of the connecting body and pressing the tapered surface of the protrusion against the inclined surface of the engagement hole, the arm part is inserted. By pushing outward, the claws can be pulled out from the troughs of the flexible tubes, thereby separating the flexible tubes from each other. Furthermore, even if a tensile force is applied to both connected flexible tubes, the projections of each connecting body will fit into the engagement holes of the cylindrical body, and the claws will fit into the troughs of the flexible tubes. Because of this, the flexible tubes will not become disconnected from each other, and since the outer periphery of the flexible tube is supported by the tube support portion, the flexible tube is prevented from being bent or deformed. Furthermore, since the outer circumferential surface of the flexible tube inserted into the cylindrical body via the connector comes into contact with the tapered surface formed on the inner wall of the cylindrical body over the entire circumference, the connector Foreign matter that has entered the flexible tube is prevented from entering through the opening of the flexible tube.

(Example) Hereinafter, an example of the present invention will be described based on the drawings. Note that FIG. 1 is an exploded perspective view of the embodiment, and FIG. 2 is an explanatory cross-sectional view showing a longitudinal section above the center line and a cross section below the center line.

This embodiment shows an example in which the present invention is adopted as a synthetic resin connector 3 for connecting flexible tubes 2 that protect electric wires 1 (omitted in FIG. 1),
The connecting tool 3 includes a cylindrical body 4 and a cylindrical body 4.
The connecting body 5 is fitted into the openings at both ends of the connecting body 5.

The cylindrical main body 4 consists of one part 4a and the other part 4b which are formed symmetrically with respect to the center thereof, and a plurality of parts (such as In the example, there are two)
An engagement hole 6 is formed therein. In addition, each part 4a, 4
The inner circumferential wall located between the engagement holes 6 on the inner surface of b is bulged to form a tube support portion 7 in which the inner diameter of this inner circumferential wall is slightly larger than the outer diameter of the flexible tube 2.
Grip recesses 8 are formed on the outer surfaces of the tubes a and 4b at locations corresponding to the tube support portions 7, and an annular stopper 9 is formed at the center of the inner surface of the cylindrical body 4. Furthermore, the outer circumferential surface of the open end side mountain portion 2a of the flexible tube 2 inserted and connected to the inner wall on the center side of each engagement hole 6 in each portion 4a, 4b via the corresponding connecting body 5, and the entire A tapered surface 10 is formed that comes into contact over the circumference.

Each of the connecting bodies 5 includes an annular portion 11 that can be fitted into the cylindrical main body 4, and an integral part formed at one end of the annular portion 11 at an appropriate interval in the circumferential direction, that is, an interval that forms the engagement hole 6. A plurality of elastically deformable arm portions 12 (two in this embodiment) whose tips are inserted deep into the cylindrical main body 4 are formed, and the tips of each arm portion 12 are formed and inserted into the outer surface side. An engaging portion 13 that protrudes and is fitted into each of the engaging holes 6, and an arm portion 12.
It is comprised of a claw part 14 that is formed on the inner surface of the distal end side and that fits into the trough of the flexible tube 2 inserted into each connecting body 5. The distal end surface 13a of the engaging portion 13 is formed into a tapered surface that slopes from the outer circumferential side toward the inner circumferential side toward the respective annular portions 11, and the rear surface 13b is also formed as a tapered surface that slopes toward the respective annular portions 11.
It is formed into a tapered surface that faces in the same direction and slopes more gently than the distal end surface 13a. Also,
When the thickness of the arm portion 12 is made thinner than the thickness of the annular portion 11 and the connecting body 5 is loosely fitted into the cylindrical body 4, there is a slight gap between the arm portion 12 and the cylindrical body 4. α is generated (see Figure 2).

Based on the above configuration, a procedure for connecting the flexible tubes 2 will be explained. First, both connecting bodies 5 are placed inside the cylindrical main body 4.
The connector 3 assembled by fitting the connectors 3 is positioned between both flexible tubes 2, and then each flexible tube 2 is pushed into each connector 5. As a result, as shown in FIG. 2, each flexible tube 2 is pushed into the cylindrical main body 4 until the outer peripheral surface of the peak 2a on the open end side comes into contact with the tapered surface 10 over the entire circumference. At the same time, the claws 14 fit into the valleys of the flexible tubes 2, and the flexible tubes are connected to each other. Therefore, the open end 2b of the flexible tube 2 is shielded from the outside, and foreign matter such as fresh concrete existing on the outer periphery of the connector does not enter the flexible tube through the open end 2b during construction.

When the flexible tubes 2 are pulled apart from each other from the state in which they are connected as described above, each connecting body 5 is also pulled in the same direction via the claw portion 14 and engaged. The rear surface 13b of the joint portion 13 hits the inner surface 6b on the end side of the engagement hole 6 and attempts to reduce the diameter of each arm portion 12 inward, so the claw portion 14 bites into the trough of the flexible tube 2. , to prevent the flexible tubes 2 from being separated from each other. Note that when the flexible tube 2 is pulled, the portion of the flexible tube 2 that engages with the claw portion 13 tends to bend and deform, but the tube support portion 7 prevents this bending deformation. . Therefore,
There is no risk that the flexible tube 2 will deform and come off the claw portion 14.

Next, when separating the flexible tubes 2, the connecting bodies 5, 5 are each pushed toward the center of the cylindrical body 4 (in the direction of arrows _X1 and _X2 in FIG. 2). As a result, the distal end surface 13 a of the engaging portion 13 slides on the inner surface 6 a on the center side of the engaging hole 6 , pushes each arm portion 12 outward, and the claw portion 14 moves into the valley of the flexible tube 2 . extracted from the department. Subsequently, by pulling the flexible tube 2, the flexible tube 2 is easily pulled out from inside the connector 3, and the flexible tubes are separated from each other.

In the above embodiment, the claw portion 14 is formed on the inner surface of the tip of the arm portion 11, but the claw portion 14 may be formed anywhere on the inner surface of the arm portion 11. Furthermore, although the connection of the flexible tube 2 for protecting the electric wire 1 has been described as an example, the present invention can also be used for connecting flexible tubes such as air ducts.

[Effect of idea]

As is clear from the above description, according to the flexible tube-to-flexible tube connector according to the present invention, flexible tubes can be connected by simply inserting the tubes together.
Furthermore, separation can be accomplished by simply pushing the connecting body into the center of the cylindrical body and pulling out the flexible tube, which is extremely easy to work with. In addition, when a tensile force is applied to both flexible tubes in the connected state, the claws provided on the inner surface of the arms of the connecting body engage with the troughs of the flexible tubes, and the tube support section Since the flexible tube is prevented from bending and deforming, the connection will not easily come off. Furthermore, since the outer circumferential surface of the flexible tube abuts the inner wall of the cylindrical body on the center side from the engagement hole over the entire circumference, foreign matter is prevented from entering the flexible tube, and the electric wires etc. inside are reliably protected. .

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is an exploded perspective view, Fig. 2 is a cross-sectional explanatory view showing the connection state of the flexible tube, and Fig. 3 is the claw portion of the connecting body when connecting the flexible tube. FIG. 3 is a cross-sectional view of the formed portion taken in a direction perpendicular to the axial direction. 2... Flexible tube, 3... Connector, 4... Cylindrical body, 5... Connecting body, 6... Engagement hole, 6a... Inner surface, 7... Tube support, 10... Taper Face, 11...
...Annular part, 12...Arm part, 13...Engagement part, 13
a... Tip surface, 14... Claw portion, α... Interval.

Claims (1)

[Scope of utility model registration request] It consists of a cylindrical main body 4 and a pair of connecting bodies 5 that are respectively fitted into openings at both ends of the cylindrical main body 4, and an annular part 11 that can fit each of the connecting bodies 5 into the cylindrical main body 4; A plurality of arm parts 1 are formed integrally with this annular part 11 at intervals in the circumferential direction, and whose tips are inserted deep into the cylindrical body 4.
2, an engaging portion 13 that forms the tip of each of these arm portions 12 and protrudes toward the outer surface side, and whose tip end surface 13a is inclined from the outer circumferential side toward the inner circumferential side toward the respective annular portions 11; 12 and a claw portion 14 that fits into the trough of the flexible tube 2 inserted into each connecting body 5. On the other hand, the cylindrical main body 4 has a claw portion 14 formed on the inner surface of each connecting body 5, and a claw portion 14 that fits into the valley of the flexible tube 2 inserted into each connecting body 5. A plurality of engagement holes 6 into which each engagement portion 13 formed on the arm portion 12 engages.
At the same time, the inner wall surfaces located at the intervals in the circumferential direction of these engagement holes 6 are bulged, and the inner diameter of the inner wall surface is adjusted to the inner diameter of the flexible tube 2 to be inserted and connected via each connecting body 5. Pipe support part 7 slightly larger than the outer diameter
and a tapered surface 1 that contacts the outer peripheral surface of the flexible tube 2 inserted into the cylindrical body 4 over the entire circumference, on the inner wall closer to the center than the respective engagement holes 6.
0, and when the engaging portion 13 engages with the engaging hole 6, a gap is formed in the peripheral wall between the opening in the cylindrical body 4 and the engaging hole 6, and the arm portion 12 is loosely fitted, and the distal end surface 1 of the engaging portion 13 is loosely fitted into the center inner surface 6a of the engaging hole 6.
A connector for connecting flexible tubes, characterized in that the tubes 3a are opposed to each other.