JP2557387B2 - Corrugated pipe fitting - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a corrugated pipe connector for connecting a corrugated pipe having a large number of annular ridges at regular intervals on an outer peripheral portion.

[Prior Art] A corrugated pipe with a large number of annular ridges at regular intervals is used as a flexible wiring protection conduit used for indoor wiring of buildings and wiring in transportation equipment. Has been done.

In order to connect the corrugated pipes of this kind to each other or to other members, a socket-cylindrical connection pipe as disclosed in Japanese Patent Publication No. 60-28215 has been proposed.

This connecting pipe is provided with a window on the outer peripheral wall of a socket cylinder that can be fitted onto the end of the corrugated pipe. A C-shaped stopper member is inserted into the socket cylinder through the window, and both end portions of the stopper member are connected to the corrugated pipe. Is a structure in which the socket cylinder is fixed to the end portion of the corrugated pipe by press-fitting and fitting into the trough portion.

[Problems to be Solved by the Invention] However, in this conventional connecting tool, until the C-shaped stopper member is formed as a completely separate body from the socket tube and the connecting tool is fitted into the end portion of the corrugated pipe. Since it is a separate part,
There is a problem that the small-sized stopper member is easily lost when the connecting tool is mounted or replaced.

Further, the window provided in the socket tube for inserting the stopper member is formed by continuously opening approximately half of the outer peripheral wall of the socket tube, so that the strength of the socket tube is significantly reduced and the socket tube is damaged. Or it may come off the corrugated tube due to external force.

The present invention solves the above-mentioned problems, and a tubular body externally fitted to the end of the corrugated tube and a fitting fixing portion fitted to the outer peripheral portion of the corrugated tube are integrally molded or easily formed. As a structure that cannot be separated, the fitting and fixing part can be prevented from being lost, and the strength of the outer peripheral wall of the tubular body can be secured sufficiently, so that the tubular body can be damaged or easily detached from the corrugated pipe by external force. It is intended to provide a non-corrugated tube fitting.

[Means for Solving the Problems] For this purpose, the corrugated pipe connector of the present invention is fitted onto the end portion of the corrugated pipe, and the rib is inserted from the opening provided in the tubular main body, and A corrugated pipe connector for fixing the tubular body to the corrugated pipe by press-fitting the ribs in a valley portion, wherein a plurality of the opening portions are provided at equal intervals in a circumferential direction of an outer peripheral wall of the tubular body. Is provided, one end of a fitting fixing portion fitted to close one side edge portion of the opening portion is openably and closably provided via a hinge, and the other end of the fitting fixing portion is provided. Is provided with a disengagement lever with the hinge as the center of rotation, and the ribs are bored on the inner peripheral side of the fitting and fixing portion, and the tips of the ribs engage with the inner peripheral wall of the tubular main body. The engaging claw is formed in the inner peripheral direction from the fitting fixing portion.

[Operation] With this connector, the end of the corrugated tube is inserted into the tubular body,
Insert the ribs of the fitting and fixing parts connected to the tubular body through the hinges into the openings provided at equal intervals in the circumferential direction of the outer peripheral wall of the tubular body, and the ribs are in the valley part of the corrugated pipe. Hold the corrugated tube by press fitting into.

Therefore, when attaching or replacing the connecting tool to the end of the corrugated pipe, the fitting fixing parts with ribs are connected to the tubular body via the hinges, so the fitting fixing parts are lost. There is no fear of doing it. Further, when the tubular main body is fitted on the outer circumference of the end of the corrugated pipe, a plurality of ribs are press-fitted into the troughs of the corrugated pipe at equal intervals, and the connector is securely fixed to the end of the corrugated pipe. .

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

1 to 4 show a first embodiment of the present invention. FIG. 1 is a perspective view of a corrugated pipe connector and a corrugated pipe, and FIG. 2 shows a state in which the corrugated pipe is inserted into the connector. The cross-sectional view shown in FIG. 3, FIG. 3 is a cross-sectional view of the connector when the connector is opened, and FIG. 4 is a cross-sectional view of the connector and the corrugated pipe when fitted. As shown in FIG. 3, the connecting tool comprises a tubular body 1 and fitting and fixing portions 2a, 2b.
The tubular body 1 and the fitting and fixing portions 2a and 2b are integrally formed of, for example, synthetic resin via the hinges 3a and 3b.

The tubular body 1 is a corrugated tube 4 applied as shown in FIG.
Of the main body 1a having an inner diameter slightly larger than the outer diameter of the corrugated tube 4 and the threaded portion 1b following the main body 1a. The inner diameter of the threaded portion 1b is smaller than the outer diameter of the corrugated tube, and as shown in FIG. A step portion 1c is formed so that the tip end of the corrugated tube 4 stops near the boundary between the main body 1a and the screw portion 1b when the end portion is fitted and inserted.
The outer peripheral wall of the body 1a has openings 5a, 5b at equal intervals in the circumferential direction.
Are formed. Fitting and fixing portions 2a and 2b are provided at one edge of the openings 5a and 5b, one end of which is connected via hinges 3a and 3b.

The fitting fixing portions 2a, 2b are the openings 5a, provided in the main body portion 1a,
It is formed in an arc shape so as to be fitted in 5b as shown in FIG. On the other end sides of the hinges 3a, 3b of the fitting fixing portions 2a, 2b, release levers 6a, 6b are provided with the hinges 3a, 3b as the center of rotation. Also, there is an opening 5 on the inner peripheral side of the fitting fixing parts 2a, 2b.
Ribs 7a and 7b that are inserted into the tubular body 1 from a and 5b are provided in a protruding manner. The inner peripheral wall 1d of the cylindrical body 1 is attached to the tips of the ribs 7a and 7b.
Engaging claws 8a, 8b that engage with are protruded from the fitting fixing portion 2 in the inner circumferential direction. The ribs 7a and 7b are respectively formed so that when the corrugated pipe 4 is fitted and inserted into the tubular body 1 at the fixed positions, the ribs 7a and 7b are properly press-fitted into the troughs 4b. The width of the ridge 4a on the outer periphery of the pipe 4 is approximately equal to the width of the rib.
The maximum height of 7a, 7b is set to be substantially equal to the depth of the valley portion 4b of the corrugated tube 4. Reference numerals 9a and 9b are recesses formed by notching the outer peripheral wall of the cylindrical main body 1 so that the removal levers 6a and 6b can be easily held when the removal levers 6a and 6b are held by fingers.

The threaded portion 1b provided at the end of the tubular body 1 may be a male threaded portion.

The corrugated pipe connector thus constructed is used as follows.

As shown in FIG. 2, the end portion of the corrugated pipe 4 to be connected is inserted until it comes into contact with the main body portion 1a of the tubular main body 1 and the step portion 1c of the screw portion 1b.

Next, as shown in FIG. 3, the arcuate fitting fixing portions 2a, 2 are opened.
The b is rotated about the hinges 3a and 3b. The rotated fitting fixing portions 2a, 2b are fitted so as to close the openings 5a, 5b. This state is shown in the cross-sectional view of FIG. As the fitting method, the fitting fixing portions 2a, 2b are pushed in the hinges 3a, 3b direction, the elastic hinges 3a, 3b are pushed and bent toward the outer wall, and the ribs 7a, 7b of the fitting fixing portions 2a, 2b are opened. The ribs 7a, 7b are inserted into the portions 5a, 5b, and the engaging claws 8a, 8b at the tips of the ribs 7a, 7b are engaged with the inner peripheral wall 1d of the tubular main body 1 and locked. At this time, the ribs 7a, 7b provided inside the fitting and fixing portions 2a, 2b are inserted into the main body through the openings 5a, 5b, and press fit into the troughs 4b of the corrugated tube 4 inside. As a result, the ribs 7a and 7b are securely fitted into the valleys 4b so as to sandwich the ridges 4a, and the connector is securely fixed to the end of the corrugated tube 4.

When connecting to another corrugated pipe (not shown), a similar connector (not shown) having a male thread on the threaded portion 1b is screwed into the threaded portion 1b of the above-mentioned connector to connect the other corrugated tube. Insert it in the connection tool in the same manner as above, and fit the fixing parts 2a, 2b.
Is fitted to the main body side so as to be closed, the other corrugated pipe is fixed to the other connecting tool having the male screw portion, and the connection of the two corrugated pipes is completed.

When the corrugated pipe 4 is connected to another member, the connection is completed by screwing the male screw portion (not shown) provided on the member with the screw portion of the connector. When disconnecting the corrugated tube 4 from the connector, the removal levers 6a and 6b may be held by hand, the fitting fixing portion 2 may be opened around the hinges 3a and 3b as the rotation centers, and the corrugated tube 4 may be removed from the connector. .

In this way, the fitting can be easily fixed to the corrugated pipe 4 simply by fitting the arcuate fitting fixing portions 2a, 2b to the tubular body 1 so as to close the fitting fixing portions 2a, 2b. Since 2b is integrally connected to the cylindrical main body 1 via the hinges 3a and 3b, there is no risk of loss. Further, the openings 5a, 5b are provided at equal intervals in the circumferential direction of the outer peripheral wall so as to be symmetrical with respect to the central axis of the cylindrical main body 1, and the openings 5a, 5b are separated into a plurality of openings. The structural weakness of the main body 1a of the tubular main body 1 can be prevented by the 5b, and the tubular main body 1 will not be damaged or will not come off from the corrugated tube 4 by an external force.

Next, FIGS. 5 to 7 show a second embodiment of the present invention. FIG. 5 is a perspective view of the corrugated pipe connector, and FIG. 6 is a transverse sectional view of the corrugated pipe connector when opened. , FIG. 7 shows cross-sectional views of the corrugated pipe connector and the corrugated pipe when fitted together. In this embodiment, unlike the first embodiment, through holes 10a and 10b are provided in the release levers 6a and 6b of the fitting and fixing portions 2a and 2b. Therefore, in the present embodiment, it is possible to easily remove the release levers 6a, 6b by using a rod-shaped member such as a driver or a member whose tip is caught in the through holes 10a, 10b in the through holes 10a, 10b.
Further, since the release levers 6a and 6b do not need to be protruded as in the first embodiment, they may come into contact with other members, or the fingertips or the like may accidentally come into contact with the release levers 6a and 6b after fixing the corrugated tube 4. Therefore, the fitting and fixing portions 2a and 2b will not be accidentally opened.

8 and 9 show a third embodiment of the present invention. FIG. 8 is a cross-sectional view of the corrugated pipe connector when the corrugated pipe connector is opened, and FIG. 9 is a fitting of the corrugated pipe connector and the corrugated pipe. The cross-sectional views at each time are shown. In this embodiment, the protruding pieces 11 are provided on the upper portions of the ribs 7a and 7b.
a and 11b are provided. Therefore, as shown in FIG. 9, when the corrugated pipe 4 is fitted, the projecting pieces 11a and 11b are engaged with the main body portion 1a by the engaging piece 1.
The fitting fixing parts 2a, 2b are pressed by the 2a, 12b, and the fitting of the fitting fixing parts 2a, 2b is further strengthened, so that the fitting fixing parts are not accidentally opened.

Incidentally, the present invention is free to various improvements within a range not departing from the gist thereof, for example, rather than opening the fitting fixing portion in the circumferential direction of the cylindrical main body 1a as in the above embodiment,
The openings 5a and 5b are provided so as to be open long in the axial direction, or the openings 5a and 5b are provided symmetrically with respect to the central axis of the cylindrical main body 1 in the above-described embodiment, but they may be provided at equal intervals in the circumferential direction of the outer peripheral wall. Well, for example, three may be provided. Also, in the above embodiment, the hinges 3a, 3b
However, the hinges 3a and 3b may be shaft hinges, the cylindrical body 1 may be provided with bearings, and the fitting fixing portions 2a and 2b may be provided with shafts. Further, the ribs 7a and 7b of the above-described embodiment are the fitting fixing portions 2
One rib is provided on the inner peripheral side of a, 2b, but this rib may be fitted in the valley portion 4b of the corrugated pipe 4, and two ribs may be provided.

[Effects of the Invention] As described above, according to the corrugated pipe connector of the present invention, since the fitting and fixing portion is connected to the tubular main body via the hinge, it is possible to mount the connector or wear it. At this time, it is possible to prevent the small fitting and fixing portion from being lost. Further, since a plurality of openings for inserting the ribs of the fitting and fixing portion are provided at equal intervals in the circumferential direction of the outer peripheral wall of the tubular body, sufficient strength of the tubular body should be ensured. Therefore, the tubular body is less likely to be damaged or to be separated from the corrugated tube by an external force. Further, when the corrugated tube is fixed, the fitting fixing portion completely closes the opening, so that it is possible to prevent foreign matter from entering the tubular body from the outside.

[Brief description of drawings]

1 to 4 show a first embodiment of the present invention, and FIG. 1 is a perspective view of a corrugated pipe connector and a corrugated pipe of the first embodiment. 2 is a cross-sectional view showing a state in which a corrugated pipe is inserted, FIG. 3 is a cross-sectional view when the corrugated pipe connector is open, and FIG. 4 is a cross-sectional view when the corrugated pipe is fitted with the corrugated pipe. 5 to 7 show the second embodiment and the fifth embodiment
FIG. 7 is a perspective view of the corrugated pipe connector, FIG. 6 is a cross-sectional view of the corrugated pipe connector when opened, and FIG. 7 is a cross-sectional view of the corrugated pipe connector and the corrugated pipe when fitted, FIG. FIG. 9 shows a third embodiment,
FIG. 8 is a cross-sectional view of the corrugated pipe connector when opened, and FIG. 9 is a cross-sectional view of the corrugated pipe connector and the corrugated pipe when fitted together. 1 …… Cylinder body 2a, 2b …… Mating and fixing part 3a, 3b …… Hinge 5a, 5b …… Opening 7a, 7b …… Rib

Claims (1)

(57) [Claims] Claim: What is claimed is: 1. A corrugated pipe is fitted onto an end portion of a corrugated pipe, and a rib is inserted from an opening provided in the tubular main body, and the rib is press-fitted into a valley portion of the corrugated pipe so that the tubular main body is corrugated. A corrugated pipe connector fixed to a pipe, wherein a plurality of openings are provided at equal intervals in a circumferential direction of an outer peripheral wall of the tubular body, and the openings are closed at one side edge of the opening. One end of the fitting and fixing part that is fitted so as to be opened and closed is provided via a hinge, and the other end of the fitting and fixing part is provided with a release lever with the hinge as the rotation center Each of the ribs is bored on the inner peripheral side of the fixing portion, and an engaging claw that engages with the inner peripheral wall of the tubular body is bored on the inner peripheral side of the fitting fixing portion at the tip of the rib. Corrugated pipe connector characterized by.