JPH09130942A - Securing unit for conduit tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a securing unit for conduit tube in which the securing/ releasing operation can be carried out quickly while reducing the size. SOLUTION: The securing unit for conduit tube comprises a fixed tube 4 having base end part 4a being coupled with a member 2 to be secured and forward end part 4b for inserting a conduit tube 1, and a ring 5 being fitted slidingly over the forward end part 4b of fixed tube 4. A plurality of resilient pieces 5b projecting integrally from the inner circumferential surface of sliding ring 5 at a predetermined interval in the circumferential direction are fitted in an opening 9 made at the forward end 4b of fixed tube 4. A pawl 5c engaging the outer circumferential recess 1a of conduit tube 1 inserted into the fixed tube 4 is formed integrally at the forward end of each resilient piece 5b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conduit tube fixing device for fixing a conduit having a corrugated outer peripheral surface to a fixed member such as a wiring box or a power supply box.

[0002]

2. Description of the Related Art Conventionally, as a device of this type, a fixed cylindrical body whose distal end portion can be reduced in diameter by a split groove formed in the distal end portion, and a male screw portion formed on the outer peripheral surface of the distal end portion of the fixed cylindrical body. After fixing the base end of the fixed cylindrical body to a fixed member such as a wiring box, the distal end of the conduit is inserted into the distal end of the fixed cylindrical body, and then, In some cases, the nut is screwed in to reduce the diameter of the distal end portion of the fixed tubular body and press-fit the wire tube to the conduit, thereby fixing the conduit to the member to be fixed via the fixed tubular body.

[0003]

SUMMARY OF THE INVENTION In the above conventional configuration,
The entire fixing device is upsized so that the fixed cylinder and the nut can withstand a strong screw fastening force. Therefore, when a fixed member such as a wiring box is provided in a narrow space, it is extremely difficult to perform the fixing work. Also, fixing the conduit inserted at the tip of the fixed cylinder,
In order to release the fixed state, it is necessary to screw the nut many times and to loosen the screw, and there is a problem that the operation of fixing and releasing the fixing is troublesome.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional disadvantages, an object of the present invention is to provide a conduit tube fixing device which is small in size and capable of performing fixing and releasing operations quickly and easily.

[0005]

In order to achieve the above object, the invention according to claim 1 is an electric wire tube for fixing an electric wire tube having a corrugated outer peripheral surface to a fixed member such as a wiring box or a power supply box. Fixing device, the base end portion of which is connected to the member to be fixed, and the electric wire tube is inserted into the tip end portion of the fixing member, and the tip end portion of the fixing cylinder member. And a cylindrical sliding ring made of synthetic resin to be fitted on the outer surface of the fixed cylindrical body. An annular projection portion that is integrally formed on the rim and that is fitted onto the fixed cylindrical body to prevent the sliding ring from coming off, and an engagement step portion that is formed on the peripheral edge portion on the base end side of each of the openings. The sliding ring is integrally projectingly provided on the inner peripheral surface of the cylinder at a predetermined interval in the circumferential direction. A plurality of elastic pieces that are engaged with each other, and an engaging claw portion that engages with an outer peripheral surface concave portion of the electric wire tube that is inserted into the distal end portion of the fixed tubular body is integrally formed at a tip end of each elastic piece. The plurality of elastic pieces of the sliding ring externally fitted to the fixed barrel are individually fitted into the plurality of openings of the tip end of the fixed barrel, and the sliding ring is attached to the fixed barrel. When sliding toward the base end side, the engaging stepped portion engages with the base end portion of the elastic piece to retract the elastic piece into the opening.

[0006]

In the invention of claim 1, when the distal end portion of the electric wire tube is inserted into the distal end portion of the fixed cylindrical body whose base end portion is fixed to the member to be fixed, the sliding member externally fitted to the fixed cylindrical body. The engaging claw portion engages with the outer peripheral surface concave portion of the conduit by the elastic force of the elastic piece provided in the moving ring. Further, the engagement step formed on the peripheral edge of the opening of the fixed cylinder at the base end side is such that when the sliding ring is slid toward the base end of the fixed cylinder, the base end of the elastic piece is formed. The engaging claw portion is retracted into the opening by engaging with. Therefore, after fixing the conduit, for example, when removing the conduit from the fixed cylinder for adjusting the length of the conduit, first, the sliding ring is slid toward the base end side of the fixed cylinder. As a result, the base end of the elastic piece engages with the engagement step formed on the peripheral edge of the base end of the opening, and the elastic piece is elastically deformed outward, so that the engaging claw portion becomes The fixed state of the conduit is released by separating from the outer peripheral surface recess. Then, only by pulling the conduit, the distal end portion of the conduit can be easily pulled out of the fixed cylinder.

Particularly, according to the electric wire tube fixing device of the present invention, since the portion where the elastic piece is provided is the cylindrical inner peripheral surface of the sliding ring, the engaging claw portion is connected to the electric wire tube. When the sliding ring is slid toward the base end side of the fixed cylinder in order to separate it from the outer peripheral surface concave portion, any part of the sliding ring may be gripped by the finger of the hand. In other words, when the cylindrical slide ring is grasped with the finger of the hand and the slide ring is fitted on the fixed cylinder or slid toward the base end of the fixed cylinder, the slide ring is grasped. Even if the location corresponds to the location where the elastic piece is provided, the deformation action of the elastic piece is not impaired.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a state in which a conduit 1 having a corrugated outer peripheral surface is fixed to a wall 2a of a fixed member 2 such as a wiring box or a power supply box via a fixing device 3 of the present invention. The fixing device 3 includes a fixing cylinder 4 made of synthetic resin,
And a sliding ring 5 made of synthetic resin which is slidably fitted to the fixed cylindrical body 4.

In FIG. 1, reference numeral 6 denotes wires such as electric wires and cables inserted into the conduit tube 1.

As shown in FIG. 3, the fixed cylindrical body 4 has a small-diameter base end 4a having an external thread 8 formed on the outer peripheral surface thereof, and a large-diameter base integrally formed concentrically with the small-diameter base end 4a. A small-diameter proximal end 4a and a large-diameter distal end 4b on the outer peripheral surface thereof.
And a flange portion 4c is formed integrally therewith.

A pair of rectangular openings 9, 9 are formed in the large-diameter distal end portion 4b at a predetermined interval in the circumferential direction. Further, a plurality of split grooves 11 are formed from the distal end edge toward the small diameter base end portion 4a. Therefore, when the sliding ring 5 is externally fitted to the large-diameter distal end 4b of the fixed cylindrical body 4, the sliding ring 5 is attached to the large-diameter distal end 4b while the distal end of the large-diameter distal end 4b is reduced in diameter. If the user grips an arbitrary place by hand and fits the sliding ring 5 to get over the annular protrusion 10, the sliding ring 5 can be fitted to the large-diameter distal end 4b.

The sliding ring 5 is provided with a ring-shaped main body 5a and a pair of substantially L-shaped members protruding integrally with the cylindrical inner peripheral surface of the ring-shaped main body 5a and individually fitted into the openings 9 and 9, respectively. FIG. 1 includes a plurality of U-shaped elastic pieces 5b, 5b, and engaging claws 5c, 5c integrally formed on the distal ends of the respective elastic pieces 5b, 5b and engaging with the outer peripheral surface recess 1a of the conduit tube 1. As shown in FIG. 4, the inner surface 12 of the engaging claw portions 5c, 5c is
The outer surface 13 is formed in a vertical shape so as to prevent the conduit tube 1 from being inserted into the fixed cylindrical body 4. Further, a pair of protrusions 5 integrally protruding from the leading edge of the ring-shaped main body 5a.
d and 5d are movably fitted into notches 13 and 13 formed in the sliding ring retaining annular projection 10,
Thus, the sliding ring 5 can be smoothly slid along the axial direction of the fixed cylinder 4.

In the above configuration, when the conduit 1 is fixed to the fixed member 2, as shown in FIG.
The small-diameter base end 4a of the through hole 1 of the wall 2a of the fixed member 2
4, the nut 15 is screwed into the male screw portion 8 of the small-diameter proximal end 4a, and the small-diameter proximal end 4a is fixed to the wall 2a. Then, the distal end of the conduit tube 1 is inserted into the large-diameter distal end 4b. Just insert the part. As a result, as shown in FIG. 4, the distal end portion of the conduit tube 1 has the inclined outer surface 1 of the engaging claw portions 5c, 5c.
3, the elastic pieces 5b, 5b are elastically deformed, and the engaging claws 5c, 5c are pushed out, so that the distal end of the conduit tube 1 can be easily inserted into the fixed cylindrical body 4, and When the insertion is stopped, as shown in FIG. 1, the vertical inner side surfaces 12 of the engaging claws 5c, 5c engage with the outer peripheral surface recess 1a of the conduit tube 1 by the elastic force of the elastic pieces 5b, 5b. The conduit 1 can be fixed to the fixed member 2 via the fixing cylinder 4.

As shown in FIG. 5, the elastic pieces 5b, 5b
The engaging claw portions 5c, 5c are respectively provided on the outer peripheral surface of the distal end of FIG.
Tapered surfaces 17 and 18 for moving the wire tube 1 toward the center thereof, and when the conduit tube 1 inserted into the fixed cylindrical body 4 is pulled out in the direction indicated by an arrow, the engaging claw portions 5c and 5c and the elastic pieces are formed. The sliding ring 5 is also slid in the same direction via 5b, 5b, and is guided by the tapered surfaces 17, 18 so that the outer peripheral surfaces of the distal ends of the elastic pieces 5b, 5b are formed on the distal peripheral edge of the openings 9, 9, respectively. As the engaging claws 5c and 5c enter the lower side and bite into the outer peripheral surface concave portion 1a of the conduit tube 1, the conduit tube 1 can be more securely fixed. In this embodiment, the outer peripheral surfaces of the distal ends of the elastic pieces 5b, 5b and the openings 9, 9 opposed thereto are provided.
The tapered surfaces 17 and 18 are formed on both the peripheral edge portion on the front end side and the tapered surface 17 (or 18) on only one of them.
May be formed.

Further, as shown in FIG. 6, when the sliding ring 5 is slid to the base end side of the fixed cylindrical body 4 as shown by an arrow at the base end side peripheral portion of the openings 9 and 9. An engagement step portion 20 is formed which engages with the base end portions of the elastic pieces 5b, 5b to retract the engagement claw portions 5c, 5c into the openings 9, 9, respectively.

In the above configuration, when the conduit 1 is to be detached from the fixed cylinder 4 to adjust the length of the conduit 1 from the fixed state of the conduit 1 shown in FIG. Is gripped by hand and slid to the base end side of the fixed cylinder 4. As a result, as shown in FIG. 6, the base ends of the elastic pieces 5b, 5b are engaged with the engaging step portions 20, and the elastic pieces 5b, 5b are elastically deformed outward, so that the engaging claw portions are formed. 5
The c and 5c are separated from the outer peripheral surface concave portion 1a of the conduit tube 1 and the engagement between the conduit tube 1 and the fixed cylindrical body 4 is released. continue,
Just by pulling the conduit 1, the distal end of the conduit 1 can be easily pulled out of the fixed cylinder 4.

In the above embodiment, the elastic piece 5b and the opening 9 are provided.
Are provided in pairs, however, three or more may be provided, respectively, whereby the conduit tube 1 can be more securely fixed.

[0018]

According to the first aspect of the present invention, a force corresponding to an excessive screw fastening force as in the conventional example is not applied to the fixed cylinder and the sliding ring. The ring can be made thin, and the entire fixing device can be reduced in size. Therefore, even when a fixed member such as a wiring box is provided in a narrow space, the fixing operation can be performed quickly and easily.

The elastic piece is elastically deformed by the engaging step only by sliding the sliding ring toward the base end side of the fixed cylindrical body, and the engaging claw is separated from the recess on the outer peripheral surface of the conduit tube. Then, the fixed state of the conduit can be easily released. Especially,
In the present invention, since the portion where the elastic piece is provided is the cylindrical inner peripheral surface of the sliding ring, the sliding ring is formed in order to separate the engaging claw portion from the outer peripheral surface concave portion of the electric wire tube. When sliding the to the base end side of the fixed cylinder,
The sliding ring can be gripped at any place with the fingers of the hand, and the operability is excellent.

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional view showing a state in which a conduit is fixed to a fixed member by a fixing device according to an embodiment of the present invention.

FIG. 2 is a view as viewed in the direction of arrows AA in FIG. 1;

FIG. 3 is an exploded perspective view of the fixing device.

FIG. 4 is a longitudinal sectional view of a main part showing a procedure for fixing the conduit tube.

FIG. 5 is a longitudinal sectional view of a main part showing a fixed state of the conduit tube.

FIG. 6 is a longitudinal sectional view of a main part showing a procedure for removing the conduit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conduit tube 1a Outer peripheral surface concave part of a conduit tube 2 Fixed member 3 Fixing device 4 Fixed cylinder 4a Base end of fixed cylinder 4b Tip of fixed cylinder 4 5 Slide ring 5b Elastic piece 5c Engagement claw 9 Opening 10 Annular projection 20 Engagement step

Claims (1)

[Claims] 1. A conduit fixing device for fixing a conduit having a corrugated outer peripheral surface to a fixed member such as a wiring box or a power supply box, the base end of which is connected to the fixed member. A fixed cylinder made of synthetic resin into which the electric wire tube is inserted in its tip, and a cylindrical slide ring made of synthetic resin that is slidably fitted on the tip of the fixed barrel. The fixed cylindrical body is provided with a plurality of openings formed at its distal end portion at predetermined circumferential intervals, and the sliding ring integrally formed on the outer peripheral surface distal edge of the fixed cylindrical body. And a stepped portion formed on the peripheral edge of the base of each of the openings, wherein the sliding ring has a cylindrical inner peripheral surface with a predetermined circumferential direction. While having a plurality of elastic pieces that are integrally projected at intervals,
Engaging claw portions that engage with the outer peripheral surface concave portion of the electric wire tube inserted into the distal end portion of the fixed tubular body are integrally formed at the distal ends of the respective elastic pieces, and are fitted onto the fixed tubular body. When the plurality of elastic pieces of the sliding ring are individually fitted into the plurality of openings of the distal end portion of the fixed cylinder, and the sliding ring is slid toward the base end side of the fixed cylinder. An apparatus for fixing a conduit, wherein the engaging step portion engages with a base end portion of the elastic piece to retract the elastic piece into the opening.