JPH0724714Y2 - Corrugated tube with locking structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of use) The present invention relates to a corrugated tube having a locking structure.

(Prior Art) A corrugated tube having a locking structure of this type is shown in FIG. 15 disclosed by the present applicant in Japanese Patent Application No. 61-167700 (Japanese Patent Application Laid-Open No. 63-28209). An external corrugated tube (70) is included.

This outer corrugated tube (70) has its trough (71) (small outer diameter).
The locking projection (72) is formed so as to project on the outer periphery of the locking projection (72) in the notch provided in the pipe insertion hole (74) of the piping device such as the box (73). After the corrugated pipe (70) is inserted, the corrugated pipe (70) is rotated so that the box (73) is provided between the locking projection (72) of the corrugated pipe (70) and the mountain portion (75) (large outer diameter portion). (4) is fitted in the peripheral wall of the tube insertion hole (74) and is fixed to the box (73).

On the other hand, as shown in Fig. 16, when connecting and fixing the terminal protection device (bell mouth) (90) to the corrugated pipe (80) which is entirely buried in the ground so that the terminal part is exposed on the wall surface. Has
A terminal protection device (90) is provided for the large inner diameter portion (82) formed on both sides of the small inner diameter portion (81) formed in a plurality of annular projections on the inner surface of the corrugated pipe (80) at regular intervals. The terminal of the corrugated pipe (80) and the terminal protection device (9) are forcibly pushed in and engaged with the locking claw (91) protruding from the outer periphery of the pipe connecting part.
0) and are connected.

(Problems to be solved by the invention) However, in the conventional external corrugated pipe (70), the corrugated pipe (70) is inserted into the pipe insertion hole (74) formed through the wall surface of the box (73) or the like. It is very suitable for inserting and fixing, but there is no peripheral wall to be fitted in the pipe insertion part when inserting and fixing the corrugated pipe in the cylindrical pipe insertion part provided in the coupling, connector, etc. Therefore, the corrugated pipe (70) cannot be connected and fixed to the coupling.

Therefore, in order to securely connect and fix the corrugated pipe to the coupling or the like, an annular fixing member (78) is attached to the pipe insertion portion (77) of the coupling (76) as shown in FIG. After the locking claws (79) protruding from the inner peripheral surface of the fixing member (78) are made to lock the peaks (75) in correspondence with the valleys (71) of the corrugated pipe (70). The screw (78a) of the fixing member (78) is tightened. Alternatively, a separate annular locking claw having elasticity is provided on the inner surface of the pipe insertion portion of the coupling,
The locking claws are engaged with the troughs of the corrugated pipe to lock the peaks.

As described above, in the conventional corrugated pipe, unless the screw (78a) of the fixing member (78) of the coupling (76) is fastened or the coupling is provided with a separate elastic locking pawl, There was a problem that it could not be securely connected and fixed to the ring.

Further, in the conventional corrugated pipe (80), when the terminal protection device (90) or the like is connected to the inner surface thereof, the terminal protection device (90) is simply used.
It is simply pushed into the corrugated pipe (80) and locked to the side surface of the small inner diameter part (81) formed on the inner surface of the corrugated pipe (80), and once the terminal protection device (90) is corrugated. There was a problem that it was difficult to remove it when it was connected to the pipe (80).

Therefore, an object of the present invention is to provide a structure in which a connection structure for a coupling or the like is simple and reliable, and moreover, a terminal protection device can be easily and surely connected to and removed from the inner peripheral surface of a corrugated pipe. It is to provide a corrugated tube having a stop structure.

Further, an object of the present invention is to use the wave provided on the long pipe after cutting the corrugated pipe as it is, and to connect the connected component having the locking projection on the inner surface and the connected component having the locking projection on the outer surface. An object of the present invention is to provide a corrugated pipe having a locking structure that can appropriately connect any of the connecting parts.

(Means for Solving the Problems) In order to achieve the above object, a corrugated pipe having a locking structure of the present invention is a corrugated pipe in which a large number of parallel waves are formed on an outer surface and an inner surface. A groove is formed by cutting out a part of the wave peak so as to penetrate the peak, and a groove is formed by cutting out a part of the wave peak on the inner surface so as to pass through the peak. It is characterized in that the locking projections of the connected parts which pass through these grooves after the cutting of the attached tube can be locked by the wave peaks on the outer surface or the wave peaks on the inner surface.

(Operation) With the above configuration, when the corrugated pipe having this locking structure is connected to the piping device such as the connector and the coupling, the corrugated pipe is adjacent to the mountain portion provided with the groove on the outer periphery thereof. Cut at the valley. Then, a mountain portion provided with a groove is arranged at the end of the cut corrugated pipe. Therefore,
The end portion of the corrugated pipe is inserted into the pipe insertion portion by making the groove correspond to the locking protrusion provided on the inner surface of the pipe insertion portion of the piping device. Then, since the locking projections pass through the grooves and correspond to the valleys inside the peaks, the locking projections are retained by the peaks when the pipe device such as the corrugated pipe or the connector or the coupling is rotated. Become so.

Further, the corrugated pipe is cut at the mountain portion provided with the groove on the inner circumference thereof. Then, the crests on the inner surface having the grooves are arranged at the ends of the cut corrugated pipe. Therefore, the end portion of the corrugated pipe is inserted into the pipe connection portion by making the groove correspond to the locking projection provided on the outer surface of the pipe connection portion of the terminal protection device. Then, since the locking projection passes through the groove and corresponds to the valley inside the peak, when the corrugated tube or the terminal protection device is rotated, the locking projection is prevented from coming off by the peak.

That is, this corrugated pipe may utilize either the groove provided on the outer surface or the groove provided on the inner surface depending on the type of the piping device to be connected.

(Embodiment) Next, an embodiment of a corrugated tube embodying the present invention will be described with reference to the drawings.

As shown in FIG. 1 and FIG. 2, the corrugated pipe (10) having this locking structure has a large outer surface as a mountain portion of an outer surface formed in a plurality of annular projections on the outer periphery thereof at regular intervals. Diameter part (11)
Is equipped with. Then, on both sides of each large outer diameter portion (11), a small outer diameter portion (12) is formed as a valley portion of the outer surface.

Further, the corrugated pipe (10) has a large outer diameter portion (1) so as to partially connect the small outer diameter portions (12) on both sides of the large outer diameter portion (11).
A groove (13) on the outer surface, which is formed by cutting out a part of (1), is provided at a predetermined interval in the longitudinal direction. The predetermined interval is
It is appropriately selected from a wide range of several cm to several m as required. The depth of the cut groove (13) is not particularly limited, and a locking protrusion (2
It may be shallow as long as it can pass 2).

In the corrugated pipe (10) of the present embodiment, a pair of the cut grooves (13) are provided on the outer periphery of the large outer diameter portion (11) at opposed positions separated by 180 degrees, as shown in FIG. As shown in FIG. 1, it is provided side by side so as to be continuous with the two adjacent large outer diameter portions (11). The cut groove (13) may be provided so as to be continuous with two or more adjacent large outer diameter portions (11) as shown in FIG. (1
It may be provided so as to be continuous over the entire length of 0). In this case, the cutting position of the corrugated pipe (10) can be appropriately changed and used effectively.

Furthermore, only one cut groove (13) is provided on the outer circumference of the large outer diameter portion (11), or 90 degrees on the outer circumference of the large outer diameter portion (11) or
A plurality of them may be provided at opposing positions spaced apart by 60 degrees or the like.

Alternatively, the cut groove (13) may be provided only in one large outer diameter portion (11) without being provided side by side so as to be continuous with two adjacent large outer diameter portions (11). In this case, the corrugated pipe (10) can be cut at the small outer diameter portion (12) adjacent to the cut groove (13) and connected to a connector such as a box for use.

Further, in the corrugated pipe (10) of the present embodiment, as shown in FIGS. 2 and 6, etc., the concave portion (14) is formed on the side surface of the large outer diameter portion (11) provided with the cut groove (13). ) Has been formed.

Further, as shown in FIG. 1 and FIG. 11, this corrugated pipe (10) is adjacent to the cut groove (13) on the outer surface, and a part of the small inner diameter portion (15) as a mountain portion on the inner surface. Is provided with an internal kerf (17) which is formed by notching from the inside. The cut groove (17) is formed so as to partially connect the large inner diameter portion (16) as the valley portion of the inner surface on both sides of the small inner diameter portion (15). The depth of the cut groove (17) is not particularly limited, and may be shallow as long as the locking protrusion (32) of the piping device can pass through.

Further, only one cut groove (17) is provided on the inner circumference of the small inner diameter portion (15), or 90 degrees on the inner circumference of the small inner diameter portion (15) or
A plurality of them may be provided at opposing positions spaced apart by 60 degrees or the like. The cut groove (17) may be provided so as to be continuous with two or more adjacent small inner diameter portions (15) as shown in FIG. 4, or the corrugated pipe ( It may be provided so as to be continuous over the entire length of 10). In this case, corrugated pipe (10)
All of the cutting positions can be effectively used by appropriately changing the cutting position.

Next, the coupling (20) as a piping device to which the corrugated pipe (10) is connected will be described. The coupling (20) is the corrugated pipe (as shown in FIGS. 2 and 5). A cylindrical pipe insertion part (21) into which the (10) is inserted, and four locking projections (22) provided on the inner surface thereof. As shown in FIG. 6, the locking projections (22) can pass through the cut grooves (13) and are provided so as to have substantially the same width as the small outer diameter portion (12). A projection (23) with which the recess (14) is engaged is formed on the side surface thereof.

Next, the operation of the corrugated pipe (10) will be described. The corrugated pipe (10) is a coupling (20) as a piping device.
When connecting to, the corrugated pipe (10) is first cut at a small outer diameter portion (12) located between two adjacent large outer diameter portions (11) provided with cut grooves (13) ( (AA line in Figure 1 or AA line in Figure 4). Then, as shown in FIG. 3, the large outer diameter portion (11) provided with the cut groove (13) is arranged at both ends of the corrugated pipe (10) cut. Therefore, in the corrugated pipe (10) of the present invention, any end side can be connected to the piping device, which is very convenient.

Next, the cutout (13) of the corrugated pipe (10) is made to correspond to the locking projection (22) of the coupling (20) and the end of the corrugated pipe (10) is inserted into the pipe insertion portion (21). . Then, as shown in FIG. 6, the locking projection (21) of the coupling (20) is provided with the cut groove (13).
Corresponding to the small outer diameter portion (12) inside the large outer diameter portion (11). Therefore, as shown in FIG. 7, the coupling (20) or the corrugated pipe (10) is rotated so that the protrusion (23) of the locking protrusion (21) becomes the recess (14) of the large outer diameter portion (11). If engaged, the corrugated pipe (10) and the coupling (29) can be easily connected to each other with a simple structure, and further, the corrugated pipe (10) and the coupling (29) can be connected to each other. The connection state of is surely maintained.

Further, the locking projection (22) of the coupling (20) is reliably prevented from coming off by the large outer diameter portion (11) of the corrugated pipe (10), so that a large force is applied to the corrugated pipe (10). Even if added, the corrugated pipe (10) will not come off from the coupling (20).

Similarly, when the end portion of the corrugated pipe (10) is inserted by making the cut groove (13) correspond to the locking projection (22) on the opposite side of the pipe insertion portion (21) of the coupling (20), As shown in FIG. 8, the locking projection (21) passes through the cut groove (13) and corresponds to the small outer diameter portion (12). Therefore, as shown in FIG. 9, the coupling (20) or the corrugated pipe (10) is rotated so that the protrusion (23) of the locking protrusion (22) becomes the recess (14) of the large outer diameter portion (11). If engaged, the corrugated pipe (10) and the coupling (20) can be connected easily and reliably as shown in FIG.

As a piping device to which this corrugated pipe (10) is connected,
Receptacles for tubular pipes such as couplings and connectors (pipe insertion part)
Needless to say, an end cover for protecting the end of the corrugated pipe, a temporary frame bushing, or the like may be used as long as it is provided with.

Next, the operation of the corrugated pipe (10) will be described according to the case where the corrugated pipe (10) is buried in the ground and the terminal protection device (bell mouth) (30) as a piping device is connected to the terminal. . First, when connecting the terminal protection device (30) to the corrugated pipe (10), the corrugated pipe (10) is provided with a small inner diameter portion (15) provided with a cut groove (17) on its inner circumference. Cut at the outer periphery (BB line in FIG. 1 or AA line in FIG. 4). Then, at both ends of the cut corrugated pipe (10), a kerf (1
The small inner diameter portion (15) provided with 7) is arranged, and in this corrugated pipe (10), any end side can be connected to the piping device, which is very convenient. Then, the end of the corrugated pipe (10) is exposed on the wall surface, and the corrugated pipe (1
0) is buried.

Then, as shown in FIG. 11 and FIG. 13, the cutout (17) of the corrugated pipe (10) is caused to correspond to the locking protrusion (32) of the terminal protection device (30), and the pipe connecting portion (31) is formed. Insert at the end of the corrugated pipe (10). Then, the locking protrusion (32) of the terminal protection device (30)
It passes through the cut groove (17) and corresponds to the large inner diameter portion (16) inside the small inner diameter portion (15). Then, rotate the terminal protection device (30) and engage the protrusion (33) of the locking protrusion (32) with the recess (18) of the small inner diameter portion (15) as shown in FIG. Although it has such a structure, the corrugated pipe (10) and the terminal protection device (30) can be easily connected to protect the terminal of the corrugated pipe (10) and finish the wall surface. The connection state between the corrugated pipe (10) and the terminal protection device (30) is reliably maintained.

The locking projection (32) of the terminal protection device (30) is securely prevented from coming off by the side surface of the small inner diameter portion (15) of the corrugated pipe (10), so that a large force is exerted on the corrugated pipe (10). The terminal protection device (30) will not come off from the corrugated pipe (10) even if it is added to the. Further, if the terminal protection device (30) is further rotated in the reverse direction and the locking projection (32) is made to correspond to the cut groove (17) again, the terminal protection device (30) can be easily attached to the corrugated pipe (10). ) Can be removed from.

Incidentally, it goes without saying that this corrugated pipe also exhibits the same effect when it is used for connection to the coupling that connects the corrugated pipes (10) to each other.

In addition, this invention forms parallel waves on the outer surface and the inner surface, and the ridges (large outer diameter portion) and troughs (small outer diameter portion) of the outer surface and the ridges (small inner diameter portion) and trough portions (inner surface) of the inner surface. Any corrugated pipe having a large inner diameter portion may be embodied in any corrugated pipe, and its material, shape, thickness and application (corrugated pipe or fluid pipe through which an electric wire is inserted) The corrugated pipe or the like through which is inserted) may be appropriately modified and implemented without departing from the spirit of the present invention. Further, the depths of the cut grooves (13) (17) may be changed as appropriate without departing from the spirit of the present invention.

(Effect of the Invention) As described above in detail, in the corrugated pipe having the locking structure of the present invention, the fixing member is attached to the piping device such as the connector and the coupling and the screw is tightened, or the elastic separate body is attached. It has an excellent effect that it can be easily and surely connected and fixed to a piping device such as a coupling with a simple structure without providing the annular locking claw, and can be easily removed.

Further, in the corrugated pipe having the locking structure of the present invention,
There is an excellent effect that the corrugated pipe can be connected to the piping device by using either the groove on the outer peripheral surface or the groove on the inner peripheral surface depending on the type of the piping device.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of a corrugated pipe having a locking structure embodying the present invention, FIG. 2 is a perspective view of the corrugated pipe and a coupling, and FIG. 3 is a front view of the corrugated pipe. FIG. 4 is a perspective view of a modification of the corrugated pipe embodying the present invention, FIG. 5 is a front view of the coupling, FIG. 6 is a side view of the corrugated pipe inserted in the coupling, and FIG. Figures 8, 8 and 9 are side views of the corrugated pipe connected to the coupling, FIG. 10 is a perspective view of the corrugated pipe connected to the coupling, and FIG. 11 is the corrugated pipe and the corrugated pipe. Fig. 12 is a perspective view of the tube protection device, Fig. 12 is a perspective view of the corrugated pipe to which the terminal protection device is connected, Fig. 13 is a longitudinal sectional view of the terminal protection device and the corrugated pipe, and Fig. 14 is the terminal protection device. Fig. 15 is a vertical cross-sectional view of a corrugated pipe to which is connected, Fig. 15 is a perspective view of a corrugated pipe having a locking structure that is connected to a conventional box, and Fig. 16 is a vertical section of a conventional terminal protection device and corrugated pipe. surface , FIG. 17 is a perspective view of the coupling conventionally used. Explanation of code 10 …… Corrugated pipe, 11 …… Large outer diameter part as mountain part of outer surface, 12
...... Small outer diameter as outer valley, 13 …… Outer kerf,
14 …… Recessed portion, 15 …… Small inner diameter portion as inner mountain portion, 16 ・ ・ ・
… Large inner diameter as inner valley, 17 …… Inner kerf, 20
...... Coupling as a piping device, 21 …… Pipe insertion part,
22,32 …… Locking protrusion, 30 …… Terminal protection device as a piping device, 31 …… Pipe connection part.

Claims (1)

[Scope of utility model registration request] 1. A corrugated tube in which a large number of parallel waves are formed on an outer surface and an inner surface, wherein a groove is formed by cutting out a part of a mountain portion of the wave on the outer surface so as to penetrate the mountain portion, and a wave on the inner surface. Forming a groove notched so as to penetrate a part of the crest portion of the corrugated pipe, and the locking projection of the connected component passing through the groove after cutting the corrugated pipe, A corrugated pipe having a locking structure characterized in that it can be locked by a mountain part or a mountain part of a wave on the inner surface.