JP2887574B2 - Corrugated tube connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector used for a corrugated tube (corrugated tube), which can easily attach and detach a corrugated tube.

[0002]

2. Description of the Related Art Conventionally, as a connector for a corrugated tube, there is Japanese Patent Application Laid-Open No. Hei 4-231788. The connector disclosed in this publication includes a housing body 101, a set body 110, and a seal member 103, as shown in FIG. The set body 110 has a locking claw 111 formed from the ring body 110a toward the flange body 110b, while the housing body 101 has an opening window 104 for the locking claw 111 formed therein. And
By attaching the set body 110 to the housing body 101, the lock claw 111 formed on the set body protrudes from the opening window 104 to form a connector. When the corrugated tube 105 is inserted into the set body 110, the end of the corrugated tube The stopper abuts on the end 103 a of the seal member 103, while the locking claw 111 a formed on the lock claw 111 is locked and mounted in the locking groove 105 a formed on the corrugated tube 105.

When the corrugated tube 105 is to be pulled out, the R-shaped surface 111b of the lock claw 111 contacts the right wall corner X of the opening window 104, while the lock claw 111a of the lock claw is set in the lock groove 105a. To prevent removal. On the other hand, when pulling out the attached corrugated tube 105, the locking claw 1 is pressed by pressing the flange body 110 b of the set body toward the seal member 103.
11 is separated from the right wall corner X of the opening window 104, and the locking claw 111a of the locking claw is a free end and can be pulled out.

[0004]

However, when the corrugated tube 105 is pulled out, if the flange body 110b of the set body 110 is pressed toward the seal member 103,
Although the locking claw 111a of the locking claw is a free end, the locking claw 111a is not completely separated from the locking groove 105a formed in the corrugated tube 105, and the so-called locking claw 111a is
a. Therefore, when the corrugated tube 105 is pulled out, the locking claw 111a is
5a is pulled out while being caught, and it cannot be pulled out smoothly. Therefore, the present invention provides a connector that can be easily mounted with a corrugated tube and can be smoothly detached.

[0005]

A connector for a corrugated tube according to the first aspect of the present invention comprises a hollow inlet body 2a and a hollow outlet body 2b.
A housing body 2A formed so that the end of the corrugated tube 20 can be brought into contact with the joint body, and a hollow set body 10A attached to the hollow entrance body of the housing body. Opening window 3 around the upper part of the cylinder 2a
Is formed on the set body 10A, and a lock claw 15 having a protruding portion 15a that can protrude from the flange body 11 in the axial direction and from the opening window 3 is formed. Inside the lock claw, a locking groove 20a of the corrugated tube is formed. Lockable hook 15b
A left convex contact body 15e and a right convex contact body 15 that can contact the opening window of the housing body on the left and right sides on the upper side of the lock claw.
f, and a concave groove-shaped bent portion 15c is formed in the straight portion 15X joining the flange body 11 and the lock claw 15, and a concave portion 15g is formed from the bent portion 15c to the right convex contact body 15f. Things.

The connector is constructed by mounting a set body 10A on a housing body 2A, and using a corrugated tube 20 inserted into the connector from the flange body 11 side of the set body in the axial direction (straight direction). Therefore, in the process of inserting the corrugated tube 20, the outer diameter of the corrugated tube and the locking claw 15b of the locking claw come into contact with each other.
When the corrugated tube 20 moves in the axial direction, the lock claw 15 also moves in the axial direction accordingly, and the left convex contact member 15e attached to the lock claw contacts and moves with the left side surface 3b of the opening window of the housing body. However, the corrugated tube 20 is further pressed in the axial direction and attached to the housing body 2A. At this time, the locking claw 15b hits the locking groove 20a of the corrugated tube and moves in a direction perpendicular to the axis, and the movement is caused by the bent portion 15c (concave groove) formed on the set body 10A.
It operates with weak force. As a result, the corrugated tube 20 can be easily inserted by the action of the locking claw 15b, and after the fitting, the locking claw 15b is engaged with the locking groove 20a by the elastic action of the locking claw 15. (FIG. 3A).

Next, the operation when a tensile force is applied to the corrugated tube 20 will be described.
Is engaged with the locking groove 20a, and the lock claw moves until the right convex contact body 15f contacts the right side surface 3a of the opening window of the housing. And further, the corrugated tube 20
When the pulling force is applied to the lock claw 15, the movement of the lock claw 15 is prohibited, and a rotation action is generated with the contact surface as a base point. At this time, the grooved bent portion (thin wall) 15c is formed in the set body 10A.
Is formed, the locking claw 15b is easily bent in the inner diameter direction, and is increasingly engaged with the locking groove 20a of the corrugated tube to prohibit disengagement. The concave portion 15g formed over 15f bites into the right bottom portion of the opening window and becomes more difficult to come off (FIG. 3B). On the other hand, when the corrugated tube is smoothly pulled out, the housing body 2A is fixed, and the flange body 11 of the set body is pressed toward the housing body 2A, whereby the left convex contact member 15e of the lock claw is opened by the opening window of the housing body. Left side 3b
And at the same time, the lock claw 15
Due to the formation of the groove-shaped bent portion (thin wall) 15c, the turning movement in the outer diameter direction is easily changed from the bent portion 15c as a base point. Therefore, the locking claw 15b of the locking claw 15 is detached from the locking groove 20a of the corrugated tube and can be pulled out without resistance (FIG. 3C).

According to a second aspect of the present invention, in the connector for a corrugated tube according to the first aspect, instead of the right convex abutment body 15f, an inclined portion 15d extending from the groove-shaped bent portion 15c to the protrusion 15a of the lock claw is provided. To form. This connector conforms to claim 1 when the corrugated tube is mounted and when the corrugated tube is smoothly pulled out. When a pulling force is applied to the corrugated tube 20 mounted on the connector, the inclined portion 15d hits the corner of the opening window. When the corrugated tube 20 is further pulled, the lock claw 15
It is easily bent in the inner diameter direction by the concave groove-shaped bent portion (thin wall) 15c, the locking claw 15b is increasingly engaged with the locking groove 20a, and the set body 10B is inclined by the inclined portion 15d and the opening window 3 is opened.
The lock claw 15 is in a compressed state as it moves while being in contact with the bottom of the, and the removal is more prohibited (FIG. 7B).

According to a third aspect of the present invention, there is provided a corrugated tube connector in which the ring body 12 is juxtaposed from the flange body 11 in the same axial direction as the lock claw 15 in the set body 10A according to the first or second aspect. (FIG. 10), it has almost the same function as the one without the ring body. Claim 4
The connector for a corrugated tube according to claim 1, 2 or 3, wherein the elastic sealing member 18 having a convex elastic action is inserted into the hollow entrance body side of the housing body 2A, thereby forming the connector between the corrugated tube and the connector. The joint can be made waterproof (FIG. 8). According to a fifth aspect of the present invention, in the corrugated tube connector according to the first, second or third aspect, the tapered portion 4a having a narrow width is formed from the hollow inlet body 2a side of the housing body toward the hollow outlet body 2b side. Thereby, the joint between the corrugated tube and the connector can be made waterproof (FIG. 9). In the corrugated tube connector according to claim 6, in claim 1, claim 2, claim 3, claim 4, or claim 5, the corrugated tube connector has an uneven groove 11a formed on the outer peripheral surface of the flange body of the set body 10A (10B). When the corrugated tube is pulled out through the set body, the set body is prevented from slipping when pressed in the direction of the housing body and can be smoothly pulled out (FIG. 1).

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS

(First Embodiment) FIG. 1 is a perspective view of a housing body 2A and a set body 10A, FIG. 2 is a side cross-sectional view of a used state of a connector, and FIG. 3 (A) is an enlarged view of a mounted state of a corrugated tube 20, FIG. 3B is a sectional view showing a state where the corrugated tube 20 is pulled, and FIG. 3C is a sectional view showing a state where the corrugated tube 20 is pulled out via the set body 10A. The housing body 2A is composed of a hollow inlet body 2a and a hollow outlet body 2b, and is an integrally molded product such as a synthetic resin. The inner diameter of the hollow inlet body 2a is a corrugated tube (corrugated tube).
The diameter of the outer wall 20 is fittable. Also, the hollow entrance body 2a
Around the protrusion 15a formed on a lock claw 15 described later.
The number of the opening windows 3 is large enough to protrude, and the number corresponding to the lock claws 15 (four in this example) is formed. Incidentally, any number of the opening windows 3 can be used. The inner diameter of the hollow outlet body 2b is smaller than the inner diameter of the hollow inlet body 2a, and the hexagonal nut 5 and the screw 6 are integrated with the hollow outlet body 2b.

A flange body 11 is formed at an end of the set body 10A, and one or a plurality of (four in this embodiment) lock claws 15 are formed from the flange body 11 through a straight portion 15x in the axial direction. It is formed at a position corresponding to the opening window 3. An uneven groove 11a is formed on the outer peripheral surface of the flange body 11 to prevent slippage when a corrugated tube 20 described later is pulled out. The projecting portion 15a formed on the lock claw 15 is formed so as to be able to protrude from the opening window 3 when the set body 10A is mounted on the housing body 2A. The locking claw 15b which can be locked at the entrance side 15Y is formed in an inclined shape.

The bent portion 15c of the lock claw 15 is a straight portion 15x joining the flange body 11 and the lock claw 15, and is formed in a concave groove shape (thin wall thickness) at least below the bottom portion X of the right wall 3a of the opening window. Then, it is easy to bend the details described later. or,
On the left side of the protruding portion 15a, a left convex contact body 15e (contacting the left wall 3b of the opening window) is formed, and on the right side, a right convex contact body 15f (contacting the right wall 3a of the opening window) is formed. Both are formed in a triangular cross section as a line contactable shape for reducing the sliding resistance, but may be a circle or the like. It should be noted that a concave portion 15g is formed from the bent portion 15c to the right convex contact body 15f.

Next, regarding the use of the connector having the above-described configuration, a mechanism corresponding to FIGS. 3 (A) to 3 (C) and FIG. 3 (B) will be described with reference to FIGS. 4 (A) and 3 (C). FIG. 4 showing the mechanism
This will be described with reference to FIG. The connector is a set 10
A is attached to the housing 2A (FIG. 3).
(A)) In this state, in the process of inserting the corrugated tube 20 in the axial direction (straight direction) from the flange body 11 side of the set body, the outer diameter of the corrugated tube and the locking claw 15b of the locking claw abut. Becomes However, when the corrugated tube 20 is pressed in the axial direction, the axial movement of the corrugated tube 20 causes the lock claw 15 to move in the axial direction accordingly, so that the left convex contact member 15e attached to the lock claw becomes a housing member. Although the movement is prohibited by contacting the left side surface 3b of the opening window, the corrugated tube 20 is further pressed in the axial direction and attached to the housing body 2A. At this time, the locking claw 15b (inclined entrance side portion 15Y) hits the locking groove 20a of the corrugated tube and moves in a direction perpendicular to the axis, and the movement is caused by the bent portion 15 formed on the set body 10A.
It can be operated with a weak force by the action of c (concave groove). As a result, the corrugated tube 20 can be easily inserted by the action of the locking claw 15b, and after the fitting, the elastic action of the locking claw 15 allows the corrugated tube 20 to be inserted.
b is engaged with the locking groove 20a (FIG. 3A).

FIG. 3B shows a state in which the corrugated tube 20 is pulled, and a corresponding mechanism is shown in FIG. 4A. In FIG. 4A, parts corresponding to those in FIG. 3B are given the same reference numerals, and can correspond to a state in which the set body 10A mounted on the housing body 2A is supported by bearings 40a and 40b. . When a pulling force is applied to the corrugated tube in a state where the corrugated tube 20 is set on the connector (FIG. 3A), the entrance side portion 15 of the locking claw 15b is formed.
In the state where Y (inclined) is engaged with the locking groove 20a, the right convex contact member 15f of the lock claw is moved to the right side surface 3 of the opening window of the housing.
Move until it touches a. Further, when a pulling force is applied to the corrugated tube 20, the lock claw 15 is prohibited from moving, and a rotation action occurs with the contact surface as a base point. At this time, a concave groove-shaped bent portion (thin wall) 15c formed in the set body 10A (because bending is easy, FIG.
(Corresponding to the rotation mechanism shown in FIG. 7A), so that the lock claw 15
Is easily bent in the inner diameter direction, so that the locking claw 15b moves in the inner diameter direction and locks into the locking groove 20a of the corrugated tube, thereby preventing removal. That is, as shown in FIG. 4A, the bent portion 15c is 15c ', and the right convex abutment 15f is 15c'.
f ', the locking claws 15b move to 15b'. Further, when a pulling force is further applied, the concave portion 15g formed from the bent portion 15c to the right convex contact body 15f cuts into the bottom corner of the opening window 3 to make it more difficult to come off.

When the recess 15g is formed as described above,
Unlike the case where an inclined portion 15d shown in a second embodiment described later is formed, the detachment prevention is more completely achieved. That is, in the case where the inclined portion 15d is formed in the locking claw 15, when the corrugated tube 20 is pulled strongly, the bent portion 15 of the locking claw is formed.
c through the inclined portion 15d to form a straight line.
Although there is a possibility that “a” penetrates into the inner periphery of the housing body 2A and the set body 10A comes off together with the corrugated tube 20, by forming the recess 15g as shown in the present embodiment, such come-off can be prevented.

On the other hand, when the corrugated tube 20 is to be pulled out smoothly, the mechanism shown in FIG.
As shown in (B), first, when the housing body 2A is fixed (taken by hand) and the flange body 11 of the set body is pressed toward the housing body 2A side, the left convex contact body 15e becomes the left wall 3b of the opening window. , And the position of the left convex contact body 15e which is in contact with the left wall 3b of the opening window is above the horizontal axis which presses the flange body 11 (FIG. 3).
(A), FIG. 4 (B)), the left convex contact body 15e is
The bent portion 15c having a concave groove shape (formed thinly) serves as a base point and easily rotates in the outer diameter direction. That is, as shown in FIG. 4B, the bent portion 15c is 15c 'and the left convex contact body 15e
Move to 15e ', and the locking claw 15b moves to 15b'.
Therefore, the corrugated tube 20 can be pulled out smoothly since the locking claw 15b is in a state of being separated from the locking groove 20a. The flange body 11 is connected to the housing body 2
When pressing to the A side, the flange body 11 is fixed with a finger,
Sliding can be prevented by the concave and convex grooves 11a formed on the outer periphery, and fixing is easy.

As described above, the corrugated tube 20
Can be easily attached to the connector constituted by the housing body 2A and the set body 10A, and does not come off even when the corrugated tube 20 is pulled in the attached state. However, when the corrugated tube 20 is detached from the connector, by pressing the flange body 11 of the set body toward the housing body 2A, the locking claw 15b can be detached from the locking groove 20a and can be smoothly removed.

(Second Embodiment) FIGS. 5 to 7 show a connector having another structure, and FIGS. 5 and 6 show a housing 2B.
7A is a perspective view and a sectional side view of the set body 10B, FIG. 7A is an enlarged view of a mounted state of the corrugated tube 20, and FIG.
FIG. 7 shows a state in which the corrugated tube 20 is pulled, and FIG.
(C) shows the corrugated tube 2 via the set body 10B.
It is sectional drawing which shows the state which removes 0. The set 10B according to the present embodiment is the same as the set 1 according to the first embodiment.
0A means that there is no right convex contact body 15f and an inclined portion 15d is formed at an obtuse angle (150 degrees in this embodiment) with respect to the bent portion 15c from the bent portion 15c to the protruding portion 15a. Make a difference.

As in the first embodiment, the connector is constructed by mounting the set body 10B on the housing body 2B, and when the corrugated tube 20 is inserted into the set body 10B, the left convex contact of the set body 10B is achieved. The body 15e comes into contact with the left wall 3b of the opening window, and the elastic locking claw 15b is vertically inserted and mounted while hitting the locking groove 20a formed in the corrugated tube (FIG. 7A).

FIG. 7B shows a state in which the corrugated tube 20 is pulled. When the corrugated tube 20 is pulled, the inclined portion 15d of the lock claw hits the corner of the bottom portion X of the right wall 3a of the opening window, while the concave portion is indented. From the bent portion 15c formed in the groove (thickness is thin), it is easily bent by obtaining the rotating action in the inner diameter direction, and as the set body 10B moves, the inclined portion 15d becomes compressed at the bottom of the opening window. Become,
The locking claw 15b is increasingly engaged in the locking groove 20a to prohibit removal.

On the other hand, when the corrugated tube 20 is to be pulled out smoothly, as shown in FIG.
As shown in (C), first, when the housing body 2B is fixed and the flange body 11 of the set body is pressed toward the housing body 2B, the left convex contact body 15e comes into contact with the left wall 3b of the opening window, and Since the position of the left convex contact body 15e abutting on the left wall 3b of the opening window is higher than the horizontal axis pressing the flange body 11 (see FIG. 7 (A)), the left The convex contact body 15e is formed by a bent groove-shaped (thinly formed) bent portion 15e.
c and bends easily and moves upward. Therefore, the corrugated tube 20 can be pulled out smoothly since the locking claw 15b is in a state of being separated from the locking groove 20a.

FIG. 8 shows a case where the elastic seal member 18 is set inside the hollow entrance body 2a of the housing body 2A of the first embodiment, and the elastic seal member 18 is connected to the corrugated tube 20 and the connector. It fulfills waterproofness. This elastic sealing member 18 is provided in the hollow entrance body 2a.
At the joint 4 between the hollow inlet body 2a and the hollow outlet body 2b
And a convex portion 18a is formed in the inner diameter direction in the middle of the axial direction, and the inner diameter of the convex portion 18a is at least 90% or less of the outer diameter of the corrugated tube 20. The corrugated tube 20 is formed to have a width of at least one pitch, and has tapered ends 18c so that the corrugated tube 20 can be easily attached when the corrugated tube 20 is inserted. The seal member 18 is configured to be symmetrical so that the direction of the seal member 18 when it is mounted on the housing body 2A is not mistaken. After setting the elastic seal member 18, the corrugated tube 20 is set via the set body 10A.
Is attached, the front end of the corrugated tube 20 is tightly adhered to the inside of the hollow entrance body 2a by the elastic seal member 18 to ensure waterproofness. In order to easily insert the corrugated tube 20 into the elastic seal member 18 without forcibly inserting the corrugated tube 20, a concave portion 18b is formed on the outer periphery of the elastic seal member 18 to reduce the thickness of that portion. Even when the corrugated tube 20 moves back and forth or rotates, the elastic sealing member 18 can ensure waterproofness.

FIG. 9 shows that a taper 4a having a narrow width from the hollow inlet body 2a toward the hollow outlet body 2b is provided at the joint 4 between the hollow inlet body 2a and the hollow outlet body 2b of the housing body 2A (2B). In addition, when the corrugated tube 20 is mounted, the distal end is crimped by the taper 4a to ensure waterproofness. By forming the taper 4a in this manner, an effect of eliminating the need for a seal member is achieved.

FIG. 10 shows a set body 10A 'having another structure.
10B ', and the ring members 1 are attached to the set members 10A' and 10B 'via the extension members 13 from the flange member 11.
2 are formed and have substantially the same operation as the set bodies 10A (FIG. 1) and 10B (FIG. 5) without the ring body.

[0025]

According to the connector for a corrugated tube according to the first aspect of the present invention, the corrugated tube is provided by providing left and right convex contact members on both sides of the lock claw of the set body and forming a thin bent portion. Although it can be easily mounted and cannot be pulled out even if a pulling force acts in the mounted state, it can be easily pulled out by pressing the set body. In addition, claim 2 forms an inclined portion instead of forming a right convex contact body, and claim 3 forms a ring body in a set body. Thus, the same effect as that of the second aspect is obtained. According to the constitutions of claims 4 and 5, the waterproofness of the corrugated tube can be improved, and the unevenness groove is formed on the outer peripheral surface of the set body. Can push the body.

[Brief description of the drawings]

FIG. 1 is a perspective view of a housing body and a set body according to a first embodiment.

FIG. 2 is a sectional view of a housing body and a set body of the first embodiment.

FIG. 3 is a cross-sectional view when the corrugated tube of the first embodiment is mounted and a diagram for explaining the operation.

FIG. 4 is a mechanism diagram corresponding to FIG. 3 for explaining the operation of the set body.

FIG. 5 is a perspective view of a housing body and a set body in a concave form according to a second embodiment.

FIG. 6 is a sectional view of a housing body and a set body according to a second embodiment.

FIG. 7 is a cross-sectional view when the corrugated tube of the second embodiment is mounted, and a diagram for explaining the operation.

FIG. 8 is a sectional view in which an elastic seal member is mounted.

FIG. 9 is a cross-sectional view showing a shape of a seal portion of a housing body.

FIG. 10 is a perspective view of a set body having another shape.

FIG. 11 is a side sectional view when a corrugated tube is mounted on a conventional connector.

[Explanation of symbols]

 2A, 2B Housing body 2a Hollow entrance body 2b Hollow exit body 3 Opening window 4 Joining part 4a Taper part 10A, 10B Set body 11 Flange body 11a Uneven groove 12 Ring body 13 Extension body 15 Lock claw 15a Projection 15b Locking claw 15c bent part 15d inclined part 15e left convex contact body 15f right convex contact body 15g concave part 18 elastic seal member 18a convex part 18b concave part 20 corrugated tube 20a locking groove

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F16L 29/00-35/00 F16L 37/00-39/04

Claims (6)

(57) [Claims] 1. A housing body formed so that an end of a corrugated tube (corrugated tube) can be abutted at a joint between a hollow inlet body and a hollow outlet body, and a hollow mountable to the hollow inlet body of the housing body. A connector having a shape of a set body,
An opening window is formed around the hollow entrance body of the housing body, and a lock claw having a protruding portion that can protrude from the opening window in the axial direction from the flange body and is formed on the set body, A locking claw that can be locked in the locking groove of the corrugated tube, and a left and right convex contacting body that can contact an opening window of the housing body on both left and right sides on the upper side of the locking claw, and a flange body A connector for a corrugated tube, characterized in that a concave groove-shaped bent portion is formed in a straight portion joining the lock claw and a concave portion is formed from the bent portion to the right convex contact body. 2. In place of the right convex contact body in claim 1,
2. The connector for a corrugated tube according to claim 1, wherein an inclined portion is formed from the bent portion having a concave groove to the projecting portion of the lock claw. 3. The corrugated tube connector according to claim 1, wherein a ring body is provided on the set body in the same axial direction as the lock claw from the flange body. 4. An elastic seal member having a cylindrical shape fitted to the inner periphery of the hollow inlet body and having a convex portion formed in the inner diameter direction at the middle in the axial direction is inserted at the joint between the hollow inlet body and the hollow outlet body. Claim 1, Claim 2, or Claim 3 characterized by the above-mentioned.
Corrugated tube connector. 5. A hollow tapered portion is formed at a joint portion between a hollow inlet body and a hollow outlet body from a side of the hollow inlet body toward the hollow outlet body. Corrugated tube connector. 6. The corrugated tube connector according to claim 1, wherein an uneven groove is formed on an outer peripheral surface of the flange body of the set body.