JPH0574123U - Structure of attachment / detachment part of flexible conduit tube with corrugated flexible conduit tube - Google Patents

Abstract

(57) [Abstract] [Purpose] A wave of a flexible conduit pipe with corrugation that can be installed with one touch by simply inserting the corrugated flexible conduit and can be easily removed with one touch without disassembling. A detachable structure for a flexible conduit is provided. [Structure] A joint body 1 and a peripheral wall 4 of an insertion port 2 of the joint body 1 are formed with a notch 5, and a ring-shaped locking tool 3 having a slot 9 is mounted in the insertion port 2. The notch 5 was covered with the arm 11 of the locking tool 3. When the corrugated flexible conduit A is inserted into the inside of the locking tool 3, the diameter of the locking tool 3 is expanded and the conduit A is inserted and locked in the locking tool 3 with one-touch operation.
When the slide 11 is slid to the outside of the notch 5, the lock 3
The diameter of the conduit is expanded so that the conduit A can be removed from the locking tool 3 with one touch.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure for attaching / detaching a corrugated flexible electric wire tube of a joint for a corrugated flexible electric wire tube, which has a firm holding force to which the corrugated flexible electric wire tube can be attached / detached with one touch.

[0002]

[Prior Art]

 In recent years, with the development and diversification of electrical equipment construction technology in buildings and condominiums, there is a demand for a simpler conduit construction. In recent years, flexible conduits that can be used in a long length, especially flexible conduits with a corrugated synthetic resin, have been rapidly used as this conduit. Along with this, the joints used for corrugated flexible conduit construction are required to have simple structures and easy handling. For conventional corrugated flexible conduit fittings that are equipped with attachments to distribution boxes, or for straight joints and T-shaped joints that have multiple corrugated flexible conduit attachment / detachment parts, use corrugated flexible conduits. In many cases, after the fitting was inserted into the corrugated flexible conduit tube attachment / detachment part, the screws installed in the attachment / detachment part were tightened to prevent the conduit tube from coming off. Recently, there is a one-touch type flexible pipe fitting for corrugated flexible cable with a corrugated flexible cable tube mounting / demounting section that can be mounted simply by pushing the flexible cable tube into the corrugated flexible cable tube mounting / demounting section. Being developed.

[0003]

[Problems to be solved by the device]

 However, the above-mentioned conventional one-touch type corrugated flexible conduit tube joint has the following problems with the corrugated flexible conduit tube attaching / detaching portion. ． It is difficult to insert a corrugated flexible conduit. ． The force to hold the corrugated flexible conduit is weak. ． It is difficult to remove the pipe from the attachment / detachment part when the corrugated flexible conduit is misplaced. ． Some corrugated flexible conduit tubes can be removed, but in order to remove them, the corrugated flexible conduit tube attachment / detachment section must be disassembled. ． The structure is complicated and the cost increases.

[0004]

[The purpose of the device]

 The purpose of the present invention is to install the corrugated flexible conduit tube securely by one-touch, and also to easily remove the corrugated flexible conduit tube with one touch without disassembling the corrugated flexible conduit tube attaching / detaching part. An object of the present invention is to provide a structure for attaching and detaching a corrugated flexible conduit that can be used for a corrugated flexible conduit joint.

[0005]

[Means for Solving the Problems]

 The detachable structure of the corrugated flexible conduit of the corrugated flexible conduit joint of the present invention is mounted in the joint body 1 and the insertion port 2 of the joint body 1 as shown in FIGS. A flexible fitting with a corrugated wire and a locking tool 3 for locking the conduit A. The same insertion port 2 of the joint body 1 has two or more cutouts 5 formed in its peripheral wall 4, and its inner wall surface. 6 and the outer wall surface 7 are both formed in a tapered taper toward the corrugated flexible conduit insertion side, to prevent the locking tool 3 from coming off at the opening end of the insertion port 2. The retaining member 8 is formed with a retaining edge 8, and the locking member 3 has a ring portion 10 formed with a slit 9 in a radial direction and two or more protrusions protruding outward from the ring portion 10 to expand and contract the diameter of the ring portion 10. And a locking projection 12 that is locked to the crest B of the corrugated flexible conduit A to be inserted. The arm 10 is slidably covered on the notch 5 formed on the peripheral wall 4 of the insertion port 2, and the inner surface 13 thereof is outside along the taper of the outer wall surface 7 of the insertion port 2. It is characterized in that the taper is formed so as to be slidable toward the outside and is inclined downward.

[0006]

[Action]

 As shown in FIGS. 4a and 4b, the detachable structure of the corrugated flexible conduit of the present invention is such that the corrugated flexible conduit A is detached from the corrugated flexible conduit in the direction of arrow X. When it is inserted into the portion, the protrusion B 12 of the ring portion 10 of the fastener 3 is pushed to the inner side and the outer side by the mountain B of the conduit A, and the ring portion in which the slit 9 is formed. 10 opens outward (expands in diameter). At this time, the inner surface 13 serving as the taper of the arm 11 of the locking tool 3 slides outward along the taper of the outer wall surface 7 of the insertion port 2 of the joint body 1, 4b, the inner diameter of the ring portion 10 becomes larger than the outer diameter of the ridge B of the corrugated flexible conduit A, and the conduit A is inserted into the ring part 10. When the corrugated flexible conduit A is inserted to a desired position in the corrugated flexible conduit tube attaching / detaching part and the locking projection 12 of the ring portion 10 falls into the valley C of the corrugated flexible conduit A, The corrugated flexible conduit A is locked by the locking projection 12, and the corrugated flexible conduit A is attached to the corrugated flexible conduit detachable portion of the joint. In this state, as shown in FIG. 4d, when the corrugated flexible conduit A is pulled in the direction opposite to the inserting direction (arrow Y direction), the ring portion 10 is tapered together with the conduit A. The diameter is reduced by pulling along the inner wall surface 6 of the mouth 2 in the direction of arrow D (the direction of the center of the ring portion 10) in FIG. Moreover, since the front surface 15 of the ring portion 10 is locked to the retaining edge 8 of the joint body 1, the corrugated flexible conduit A cannot be removed until the conduit A itself or the locking tool 3 is damaged.

Next, it is necessary to remove the corrugated flexible conduit A from the joint in order to erroneously pipe the corrugated flexible conduit A or to adjust the length of the corrugated flexible conduit A. At this time, the two arms 11 of the locking tool 3 which are put on the two notches 5 of the joint body 1 of the corrugated flexible electric wire tube attaching / detaching portion are simultaneously finger-operated as shown in FIG. When pushed to, the taper inner surface 13 of the arm 11 slides outward along the taper of the outer wall surface 7 of the insertion port 2, whereby the inner diameter of the ring portion 10 is corrugated. The outer diameter of the ridge B of the attached flexible conduit A is expanded to be larger than that of the ridge B, so that the locking projection 12 is disengaged from the ridge B and the conduit A is easily pulled out from the ring portion 10.

[0008]

【Example】

 FIG. 2 shows an embodiment of the present invention, which is a component member of a corrugated flexible conduit tube attaching / detaching part of a corrugated flexible conduit tube fitting having a mounting portion Q for mounting with a nut O on a wiring box O. 1 is an example. The joint body 1 is made of plastic. As shown in FIG. 1, the joint body 1 is formed with a receiving recess 14 for mounting the locking tool 3, and two notches 5 are formed on the peripheral wall 4 of the insertion port 2 so as to face each other. Both the inner wall surface 6 and the outer wall surface 7 of the insertion port 2 are formed in a tapered taper toward the insertion side of the corrugated flexible conduit tube. A retaining edge 8 is formed at the opening end of the insertion port 2 to prevent the locking device 3 from coming off.

FIG. 3 shows an embodiment of a locking tool 3 which is a constituent member of a corrugated flexible conduit tube attaching / detaching portion of the corrugated flexible conduit tube joint of the present invention. This locking tool 3 is also made of plastic. The locking device 3 is formed of a ring portion 10 and two arms 11 projecting outward from the ring portion 10. The ring portion 10 has an inner diameter smaller than the outer diameter of the corrugated flexible conduit A, and a slot 9 is formed in a part of the radial direction thereof. The slit 9 is cut diagonally with a certain width. When the two arms 11 are pushed toward the center, both ends 15, 16 of the slit 9 are vertically crossed to reduce the diameter of the ring portion 10. However, when the arm 11 is opened in the opposite direction (outside), the diameter of the ring portion 10 is expanded. On the inner surface of the ring portion 10, a ring-shaped locking projection 12 is provided which projects into the valley C of the corrugated flexible conduit A and locks on the mountain B so as to project over the entire circumference of the ring portion 10. The arm 11 is slidably fitted on the notch 5 so that the diameter of the ring 10 can be expanded and contracted. The inner surface 13 of the arm 11 is formed into a taper inclined downward toward the outside so that it can slide outward along the taper of the outer wall surface 7 of the insertion port 2 of the joint body 1. There is.

The joint body 1 shown in FIG. 2 is formed by integrally molding the joint body portion 21 and the fitting attachment portion 22, and the joint body portion 21 and the fitting attachment portion 22 are shown in FIG. As shown in FIG. 7, the joint body portion 21 and the fastener mounting portion 22 formed separately may be connected by press fitting. Good.

[0011]

[Effect of the device]

 The structure for attaching and detaching the corrugated flexible conduit of the corrugated flexible conduit joint of the present invention can be inserted and fixed by pushing the corrugated flexible conduit A in one touch, and the detachable part is disassembled. It is possible to easily remove the corrugated flexible conduit A that has been inserted and fixed simply by sliding the arm 11 of the locking tool 3 to the outside without removing the corrugated flexible conduit A. In addition, since the structure of the corrugated flexible conduit tube attaching / detaching portion is simple, it is easy to manufacture, it is hard to be broken, and the cost is low.

[Brief description of drawings]

FIG. 1 is a side view in which a portion of a corrugated flexible conduit tube attaching / detaching portion of the present invention is vertically cut.

FIG. 2A is a side view of an upper half longitudinal section showing an example of a joint main body in a corrugated flexible conduit joint having a wiring box mounting portion having a corrugated flexible conduit attaching / detaching portion of the present invention. . FIG. 2B is a front view of the joint body.

FIG. 3A is a side view of the lower half of the locking tool in the corrugated flexible electric wire tube attaching / detaching portion of the present invention. FIG. 11B is a front view of the same locking tool.

4A to 4C are explanatory views of a case where a corrugated flexible conduit tube is attached to a corrugated flexible conduit tube attaching / detaching portion of the present invention. Same figure d
FIG. 6 is an explanatory view of pulling out the corrugated flexible electric wire pipe attached to the corrugated flexible electric wire pipe attaching / detaching portion of the present invention.

FIG. 5 is an explanatory view showing a state in which the corrugated flexible conduit tube A attached to the corrugated flexible conduit tube attaching / detaching portion of the present invention is removed.

FIG. 6A is a side view of the upper half of a different coupling main body in the corrugated flexible conduit tube attaching / detaching portion of the invention for corrugated flexible conduit tube. FIG. 11B is a front view of the same locking tool.

FIG. 7a is a side view of the upper half of a different coupling main body in the corrugated flexible conduit tube attaching / detaching portion of the corrugated flexible conduit tube according to the present invention. FIG. 11B is a front view of the same locking tool.

[Explanation of symbols]

 1 Joint body 2 Flexible corrugated conduit outlet of joint body 3 Locking tool 4 Peripheral wall 5 Notch section 6 Inner wall surface 7 Outer wall surface 8 Locking edge 9 Slot 10 Locking ring section 11 Locking tool Arm 13 Inner surface A Wave flexible conduit tube B Mountain C Valley

Claims (1)

[Scope of utility model registration request] 1. A corrugated flexible conduit tube having a fitting part to a distribution box and a corrugated flexible conduit tube attaching / detaching part or a plurality of corrugating flexible conduit tube attaching / detaching parts. The attachment / detachment portion is composed of a joint body 1 and a locking tool 3 for retaining the corrugated flexible electric wire tube A mounted in the insertion opening 2 of the joint body 1. Two or more cutouts 5 are formed in the peripheral wall 4, both the inner wall surface 6 and the outer wall surface 7 thereof are formed into a taper which is inclined downward toward the corrugated flexible conduit insertion side, and the same insertion opening 2 A retaining edge 8 for preventing the locking tool 3 from coming off is formed at the opening end of the locking tool 3, and the locking tool 3 has a ring portion 10 having a slot 9 formed in a part in the radial direction and an outside thereof. Waves formed by two or more arms 11 projectingly extending and contracting the diameter of the ring portion 10 and inserted into the inner surface of the ring portion 10. A locking projection 12 for locking the mountain B of the flexible electric conduit A is formed, and the arm 10 is provided with the insertion port 2
It is slidably covered on the notch 5 formed on the peripheral wall of the inner wall 13 and the inner surface 13 is a tape of the outer wall surface 7 of the insertion port 2.
A detachable part structure of a corrugated flexible electric wire pipe of a joint for a flexible electric wire pipe with corrugations, characterized in that the taper is formed in a taper inclined downward toward the outside so as to be slidable along the optical path.