JP6991919B2 - Corrugated pipe connection and expansion prevention device - Google Patents

Description

In the present invention, the ends of adjacent corrugated pipes are connected to each other to form a continuous pipeline, and the corrugated pipe has a continuous slit in the longitudinal direction for accommodating wiring / piping material inside. It relates to a connecting body of a corrugated pipe for preventing the expansion of the slit of the pipe, and an expansion preventing tool.

In order to accommodate and protect the wiring material or piping material inside, a corrugated pipe in which peaks and valleys are alternately formed on the outer surface is used. As a connecting body for connecting the ends of the corrugated tube, the one described in Patent Document 1 is known. The connecting body of Patent Document 1 includes a pair of split tubular members constituting a tubular body and a connecting member for connecting the peripheral ends of the split tubular members, and the connecting members are both tightened by tightening the tightening member. The ends of the split cylinder members are kept closed, and the corrugated pipes are connected to each other.

Next, as an expansion preventive tool for preventing the slit of the corrugated tube having a continuous slit from expanding and holding the slit in a closed state, the one described in Patent Document 2 is known. This expansion preventive tool is made of an elastically deformable material, is formed in a substantially C shape, is elastically expanded so as to exceed the diameter of the corrugated tube, and after the corrugated tube is inserted and accommodated inside. By closing it, it can be attached to the corrugated tube.

Japanese Patent Application Laid-Open No. 2003-176884 Japanese Unexamined Patent Publication No. 2004-248364

However, in the connecting body of Patent Document 1, a pair of split cylinder members are opened and closed by a hinge in the middle portion, and the ends of the split cylinder members are connected to each other by using a tightening tool such as a spanner for the bolt body. By tightening the nut, which is a tightening member, the corrugated pipes are held in a closed state and connected, so the configuration is complicated and the connection work is troublesome.

Further, the expansion preventive tool of Patent Document 2 is formed in a substantially C shape, and one of them is simply elastically expanded, a corrugated tube is inserted inside, and then the corrugated tube is closed. Since it is attached to the pipe, there is a risk that it will come off from the corrugated pipe.

Therefore, an object of the present invention is to provide a connecting body of a corrugated tube which can easily connect corrugated tubes to each other with a simple structure, and also to provide a corrugated tube having a continuous slit formed therein. An object of the present invention is to provide a tool for preventing the expansion of a corrugated tube that can stably prevent the expansion.

The connecting body of the corrugated pipe according to claim 1 is composed of two divided bodies having the same shape, and is assembled to each other to form a tubular shape, and holds the end of the corrugated pipe facing the inside of the cylinder. The portions are connected to each other to form a continuous pipeline, and the shaft of the end portion of the corrugated pipe is inserted into the outer surface recess of the end portion of each corrugated pipe on one end side and the other end side, respectively. The regulation protrusion for restricting the exit in the direction has a connection portion provided on the inner surface, and the regulation protrusion is inserted into the outer surface recess at the end of one of the corrugated pipes with only the divided body of 1 . In the state, each of the two connecting portions has an opening for receiving by the radial movement of the corrugated pipe and the corrugated pipes are attached to each other so as to be temporarily attached to the end of the one corrugated pipe. It is divided so as to form a pair of holding arms that are held from the opposite side in the circumferential direction.

The connecting body of the corrugated tube according to claim 2 has a pair of holdings in which an opening for receiving by the radial movement of the corrugated tube is formed between the tips and the corrugated tube is held from opposite sides to each other in the circumferential direction. Two split bodies of the same shape provided with at least one set of arms are assembled to each other so as to surround the corrugated tube in the circumferential direction, thereby connecting the ends of the two corrugated tubes. Therefore, only the divided body of 1 can be attached to the end of the corrugated tube of 1 by the at least one set of holding arms, and the corrugated tube can be attached in the attached state. The two divided bodies are provided with an engaging portion and an engaged portion that engage with each other, and are assembled with each other. It can be attached.

In the connection body of the corrugated tube according to claim 3, the two split bodies are engaged with each other formed at the tip of at least one of the pair of holding arms of the one split body. An engaging portion that engages with the portion is provided and can be assembled to each other.
The connecting body of the corrugated pipe according to claim 4 can be assembled to each other in a state where the two divided bodies are attached to the ends of the corrugated pipes, respectively.

The tool for preventing the expansion of the corrugated pipe according to claim 5 is attached to the corrugated pipe having a continuous slit in the longitudinal direction, and in order to prevent the expansion of the slit, the outer periphery of the corrugated pipe is covered. At least one set of one-to-one holding arms to be held is provided, and in the one set of holding arms, the combined overall arc portion is the outer periphery of the corrugated tube. A regulation protrusion having a length of half a circumference or more and entering at least two outer surface recesses separated in the axial direction of the corrugated pipe is provided on the inner surface, and the two expansion preventive tools do not interfere with each other. Each regulation protrusion can be attached to the corrugated pipe in a state of being inserted into the same outer surface recess of the corrugated pipe.
The expansion prevention tool for the corrugated tube according to claim 6 has an engaging portion and an engaged portion that can be assembled by engaging with each other.
The tool for preventing the expansion of the corrugated pipe according to claim 7 is attached to the corrugated pipe having a continuous slit in the longitudinal direction to prevent the expansion of the slit, and the corrugated pipe is prevented from expanding. At least one set of one-to-one holding arms that hold the outer circumference of the tube is provided, and a restricting protrusion that enters the outer surface recess of the corrugated tube is provided on the inner surface, and the at least one set of holding arms is provided. An arc-shaped inner surface having a length exceeding half the circumference of the outer circumference of the corrugated tube is formed, and the two expansion prevention tools are engaged with each other and engaged with each other so as to be assembled in a tubular shape. It has a part.

The connecting body of the present invention is formed into a cylindrical shape only by assembling two divided bodies having the same shape, and since the regulating protrusion enters the outer surface recess of the corrugated pipe, the ends of the corrugated pipe have a simple structure. Can be connected.
In addition, since the two split bodies can be assembled while being temporarily attached to the ends of each corrugated pipe and simply approaching each other from both sides, it is easy to connect the ends of the corrugated pipes facing each other. Can be done.

The expansion preventive device of the present invention is assembled so that each holding arm portion holds the corrugated tube from both sides in a tubular shape in the entire circumferential direction. Since the regulation protrusion can be attached to the corrugated tube without interfering with each other in a state where the corrugated tube is inserted into the same outer surface recess of the corrugated tube, the slit of the corrugated tube having a continuous slit is widened. Can be stably prevented.

It is a perspective view of the connection body of the corrugated tube of the embodiment of this invention. It is an exploded perspective view of the connection body of FIG. The divided body of FIG. 1 is shown, (a) is a front view, (b) is a right side view, (c) is a bottom view, and (d) is a sectional view taken along line EE of (b). It is sectional drawing of the holding arm part at each position of FIG. It is a perspective view which shows the state which connects the end portions of the corrugated pipes while assembling the two split bodies of the connection body of FIG. FIG. 5 is a perspective view showing a state in which the two divided bodies of FIG. 5 are assembled and the ends of the corrugated pipe are connected to each other. It is a perspective view which shows the state which attaches to the corrugated tube while assembling two expansion prevention tools of the corrugated tube of the embodiment of this invention. Another split body of FIG. 1 is shown, (a) is a perspective view, and (b) is a perspective view of a connected body in which two split bodies are assembled. It is a perspective view which shows the still another division body of FIG.

Hereinafter, the connecting body of the corrugated tube and the expansion preventing tool according to the embodiment of the present invention will be described with reference to the drawings. Here, the connecting body of the corrugated pipe forms a continuous pipe line by holding both opposite ends of the two corrugated pipes inside and connecting the ends thereof. On the other hand, the expansion preventive tool for the corrugated pipe is attached to the corrugated pipe having a continuous slit in the longitudinal direction to prevent the slit from expanding. In this embodiment, since the split body described later and the expansion preventive tool have the same configuration, the connection body will be mainly described.

The corrugated pipe is a protective pipe that houses and protects wiring materials such as cables, electric wire pipes, and piping materials such as water supply pipes. Are continuously and alternately arranged, have flexibility, and the valleys form outer surface recesses 22. The corrugated tube 20 is made of synthetic resin, and the adjacent outer surface recesses 22 are independent of each other in the pipe axis direction, and the outer surface as a whole has a parallel structure. Further, in the corrugated tube 20 shown in FIGS. 5 to 7, a slit 23 continuous in the longitudinal direction is formed, but when used as a connecting body, the corrugated tube 20 is not provided with the slit 23. The same applies to 20.

As shown in FIGS. 1 to 4, the connecting body is composed of two split bodies 10 made of synthetic resin having the same shape, and the two split bodies 10 are assembled to each other so as to surround the corrugated tube 20 in the circumferential direction. It is formed into a tubular shape by being formed. The connecting body 1 has a connecting portion 11 to which the corrugated pipe 20 is connected at one end side and the other end side. Each connecting portion 11 is divided so as to have an opening 12 for receiving the corrugated tube 20 by moving in the radial direction and to form a holding arm portion 13 for holding the corrugated tube 20 in the circumferential direction.

In each of the divided bodies 10, four holding arm portions 13 are arranged side by side in the longitudinal direction. Of these, the leftmost holding arm portion 13a in FIG. 3A has a cross-sectional shape cut by the AA cutting line from the center line O of the entire connecting body 1 as shown in FIG. 4A. The arc portion on the left side is formed longer than the right side. On the other hand, in the holding arm portion 13b on the left side of the middle portion in FIG. 3 (b), the cross-sectional shape cut by the BB cutting line is on the right side from the center line O as shown in FIG. 4 (b). The arc portion of is formed longer than the left side. Therefore, although the holding arm portion 13a and the holding arm portion 13b are both formed in a semicircular shape in cross section, the entire arc portion in which these one-to-one pairs are combined occupies more than half a circumference. The corrugated tube 20 inserted inside through the opening 12 is held in the circumferential direction. Therefore, only one divided body 10 can be temporarily attached to the end portion 21 of one corrugated tube 20.

Similarly, the cross-sectional shape of the holding arm portion 13c on the right side of the intermediate portion in FIG. 3C has a cross-sectional shape cut by the CC cutting line, as shown in FIG. 4C, the center line of the entire connecting body 1. The arc portion on the left side of O is formed longer than the right side. On the other hand, the rightmost holding arm portion 13d in FIG. 3D has a cross-sectional shape cut by the DD cutting line, as shown in FIG. 4D, an arc portion on the right side from the center line O. Is formed longer than the left side. Therefore, the entire arc portion including the one-to-one pair of the holding arm portion 13c and the holding arm portion 13d occupies more than half a circumference, and the corrugated tube 20 inserted inside from the opening 12 is in the circumferential direction. Be embraced by. Therefore, only one divided body 10 can be temporarily attached to the end portion 21 of one corrugated tube 20.

As described above, since each of the divided bodies 10 is provided with a total of two sets of one-to-one sets of holding arms 13 and 13, only one pair of holding arms 13 and 13 has one wave. The end 21 of the tube 20 is held and temporarily attached, and the other one-to-one pair of holding arms 13 and 13 holds the end 21 of the other corrugated tube 20 and is temporarily attached. Is possible.

Waves enter the outer surface recess 22 of the end portion 21 of the corrugated tube 20 on the inner surfaces of the left-end holding arm portion 13a and the right-end holding arm portion 13d, which are one end side and the other end side of the divided body 10. A regulating protrusion 14 is provided to prevent the end portion 21 of the attached pipe 20 from coming out in the axial direction. The regulating protrusion 14 is formed of a small protrusion that stands at a constant height from the inner surface of the holding arm portion 13, and is provided along the circumferential direction at substantially the center of the holding arm portion 13 in the width direction. A total of two regulation protrusions 14 on one end side and the other end side of the split body 10 enter into different outer surface recesses 22 separated in the axial direction of the corrugated pipe 20, respectively.

Further, the split body 10 is engaged with the holding arm portion 13a at the left end and the holding arm portion 13d at the right end, and the holding arm portion 13a and the holding arm portion 13d at the right end of the other split body 10. An engaging portion 15 that engages with the portion 16 is provided. Specifically, as shown in FIG. 4A, an engaging portion 15 made of a wedge-shaped engaging projection is provided on the inner surface side of the right end of the holding arm portion 13a at the left end, and the holding arm portion 13a is provided. An engaged portion 16 formed of a recess is provided on the outer surface side of the left end end of the above, on which the engaging portion 15 of the holding arm portion 13a of the other split body 10 is engaged. Further, as shown in FIG. 4 (d), an engaging portion 15 made of a wedge-shaped engaging projection is provided on the inner surface side of the right end of the right end holding arm portion 13d, and the left tip of the holding arm portion 13d is provided. On the outer surface side of the above, an engaged portion 16 formed of a recess is provided to which the engaging portion 15 of the holding arm portion 13d of the other split body 10 is engaged.

In the two split bodies 10, one of the split bodies 10 is formed by engaging the engaging portion 15 of each holding arm portion 13 with the engaged portion 16 of each holding arm portion 13 of the other split body 10. The 10s can be turned upside down and assembled to each other.

Since the two split bodies 10 are configured in this way, the regulating protrusion 14 of the holding arm portion 13a of the one split body 10 and the regulating protrusion 14 of the holding arm portion 13a of the other split body 10 are formed. , It can be inserted into the same outer surface recess 22 at the end 21 of one corrugated tube 20 and temporarily attached to the one corrugated tube 20. Further, the regulation protrusion 14 of the holding arm portion 13d of one split body 10 and the regulation protrusion 14 of the holding arm portion 13d of the other split body 10 are the same at the end portion 21 of the other corrugated tube 20. It can be inserted into the outer surface recess 22 of the above surface and temporarily attached to the other corrugated tube 20. The two divided bodies 10 can be assembled without interfering with each other in a state of being temporarily attached to the end portions 21 of different corrugated tubes 20.

Next, a method of connecting the corrugated pipe 20 using the connecting body 1 of the present embodiment configured in this way will be described.
First, as shown in FIG. 5, one corrugated tube 20 is opened from the opening 12 of the connecting portion 11 while elastically expanding the holding arm portion 13a and the holding arm portion 13b of the upper split body 10. It is moved in the radial direction to accommodate and hold the end portion 21 in the holding arm portion 13, and the temporary attachment state is set. At this time, the restricting protrusion 14 of the holding arm portion 13a of one of the split bodies 10 is inserted into the outer surface recess 22 of the corrugated pipe 20. Similarly, the other corrugated tube 20 is moved radially from the opening 12 of the connecting portion 11 while elastically expanding the holding arm portion 13c and the holding arm portion 13d of the other lower split body 10. The end portion 21 is accommodated and held in the holding arm portion 13, and the temporary attachment state is set. At this time, the restricting protrusion 14 of the holding arm portion 13d of the other split body 10 is inserted into the outer surface recess 22 of the corrugated pipe 20.

Next, in the temporarily attached state, the two divided bodies 10 are brought close to each other from the vertical direction to sandwich the corrugated tube 20, and the engaged portions 15 and the engaged portions 16 are engaged with each other as shown in FIG. Assemble to. At this time, the two divided bodies 10 can be assembled without interfering with each other. As a result, the end portions 21 of the corrugated pipes 20 adjacent to each other are connected to each other, and the regulation protrusion 14 of the split body 10 is inserted into the outer surface recess 22 of the corrugated pipe 20. It is prevented that 21 moves in the axial direction and comes off from the divided body 10.

As a procedure for connecting the end portions 21 of the corrugated pipe 20 using the connecting body 1, first, the end portions 21 of both corrugated pipes 20 are inserted and accommodated inside one of the divided bodies 10. Therefore, it is also possible to assemble and connect the other divided body 10 to the one divided body 10.

By the way, the divided body 10 of the connecting body 1 of the present embodiment has the same configuration as the spreading prevention tool 2. Therefore, the divided body 10 can also be used as an expansion preventive tool 2 for preventing the expansion of the slit 23 of the corrugated tube 20 in which the slits 23 continuous in the longitudinal direction are formed.

In order to prevent the expansion of the slit 23 of the corrugated pipe 20 by using the expansion prevention tool 2, the two expansion prevention tools 2 are used as shown in FIG. 7 in the same manner as in the case of the connecting body 1. It suffices to assemble and accommodate and hold the corrugated tube 20 inside. It should be noted that the expansion preventive tool 2 may be attached in one pair or a plurality of sets at an arbitrary position in the axial direction in one corrugated tube 20 at intervals. Further, the expansion prevention tool 2 can be used to prevent expansion of the slit 23 of the corrugated tube 20, and can also be used to connect the ends 21 of the corrugated tube 20 in which the slit 23 is formed. In that case, as a matter of course, it is also attached to a place where the end portions 21 of the two corrugated pipes 20 are connected to each other.

Next, the operation of the connecting body 1 of the present embodiment will be described.
The connecting body 1 is formed into a cylindrical shape by simply assembling two divided bodies 10 having the same shape, and the regulation protrusion 14 enters the outer surface recess 22 of the corrugated pipe 20, so that the corrugated pipe 20 has a simple structure. The ends 21 of the can be connected to each other.

Further, since the two divided bodies 10 can be assembled while being temporarily attached to the end portions 21 of the corrugated pipes 20 from both sides, the end portions 21 of the corrugated pipes 20 facing each other can be assembled. You can easily perform the connection work.

Next, the operation of the spread prevention tool 2 of the present embodiment will be described.
The two expansion preventive devices 2 are assembled so that the respective holding arm portions 13 hold the corrugated tube 20 in a tubular shape from both sides in the entire circumferential direction, and the regulation of each expansion prevention device 2 Since the protrusion 14 can be attached to the corrugated tube 20 without interfering with each other in a state where the protrusion 14 is inserted into the same outer surface recess 22 of the corrugated tube 20, the slit of the corrugated tube 20 having a continuous slit 23 formed therein. It is possible to stably prevent the 23 from expanding.

By the way, in the connecting body 1 and the expansion prevention tool 2 of the above-described embodiment, the four holding arm portions 13 of the split body 10 have a long holding arm portion 13 on the left side from the center line O and a long holding on the right side portion. The arm portion 13 and the arm portion 13 are alternately arranged in the longitudinal direction of the divided body 10. As shown in FIG. 8 (a), the leftmost holding arm portion 13a is held at the right end of FIG. 4 (d). Similar to the holding arm portion 13d, the arc portion on the right side from the center line O of the entire connecting body 1 is formed longer than the left side, and the holding arm portion 13b on the left side of the middle portion is formed in the same manner as the holding arm portion 13c on the right side of the middle portion. It is also possible to form the arc portion on the left side from the center line O longer than the right side and integrate the holding arm portion 13b and the holding arm portion 13c into one wide holding arm portion 13e. In this case, the divided body 10 has a shape composed of three holding arm portions 13 as a whole. FIG. 8B shows a connecting body 1 in which two divided bodies 10 are assembled.

Further, the split body 10 and the expansion preventive tool 2 of the connection body 1 of the above embodiment are provided with two sets of a pair of holding arm portions 13, 13, that is, the holding arm portion 13a and the holding arm portion. A one-to-one pair consisting of the 13b and a one-to-one pair consisting of the holding arm portion 13c and the holding arm portion 13d are provided. As shown in FIG. 9, the pair of holding arm portions 13 is one. It is also possible to provide only a set. In the divided body 10 shown in FIG. 9, the holding arm portion 13f on one side has an arc formed longer than half a circumference, and the holding arm portion 13g on the other side has an arc formed shorter than half a circumference. Then, when the two divided bodies 10 are assembled, they are formed into a cylindrical shape. The regulation protrusion 14 is projected from the inner surface of both the holding arm portion 13f and the holding arm portion 13g, and enters the outer surface recess 22 of the end portion 21 of the different corrugated tube 20, and the corrugated tube 20 is the axis. Regulate getting out of the direction. The split body 10 having this configuration can also be used for both the connecting body 1 and the spreading prevention tool 2.

Further, the engaging portion 15 and the engaged portion 16 of the above embodiment are provided on the holding arm portion 13a and the holding arm portion 13d, but are provided on another holding arm portion 13b or the holding arm portion 13c. It may be provided, or it may be provided on all four holding arm portions 13. Further, when used as the expansion preventive tool 2, the assembling strength between the two expansion prevention tools 2 does not have to be so large, so that the engaging portion 15 and the engaged portion 16 are completely disengaged. It may not be provided.

The two divided bodies 10 of the above embodiment are assembled in a state where the regulating protrusion 14 is inserted into the same outer surface recess 22 of the corrugated pipe 20, but when used as the connecting body 1, the regulating protrusion 14 is assembled. , It does not necessarily have to be fitted into the same outer surface recess 22 of the corrugated tube 20.

In addition, although the split body 10 of the above embodiment is provided with one or two sets of a pair of holding arm portions 13, three or more sets may be provided.

1 Connection part 15 Engagement part 2 Expansion preventer 16 Engagement part 10 Divided body 20 Waved pipe 11 Connection part 21 End part 12 Opening 22 Outer surface recess 13 Holding arm part 23 Slit 14 Regulatory protrusion

Claims (7)

It is composed of two split bodies of the same shape, which are assembled together to form a cylinder, hold the ends of the corrugated pipes facing each other in the cylinder, and connect the ends to form a continuous pipe line. It is a connection of corrugated pipes
On each of the one end side and the other end side, a connection portion provided on the inner surface with a regulation protrusion that enters the outer surface recess of the end portion of each corrugated pipe and regulates the axial exit of the end portion of the corrugated pipe. Have and
In order to enable temporary attachment to the end of one of the corrugated pipes in a state where the regulation protrusion is inserted into the outer surface recess of the end of one of the corrugated pipes with only the divided body of 1 .
Each of the two connecting portions has an opening for receiving by the radial movement of the corrugated tube, and is divided so as to form a pair of holding arms for holding the corrugated tube from opposite sides in the circumferential direction. A corrugated tube connection that is characterized by being. An opening is formed between the tips to receive by the radial movement of the corrugated tube, and at least one pair of holding arms for holding the corrugated tube from opposite sides in the circumferential direction is provided and has the same shape. The two divided bodies are assembled to each other so as to surround the corrugated pipe in the circumferential direction, thereby connecting the ends of the two corrugated pipes to each other.
Only the divided body of 1 can be attached to the end of the corrugated tube of 1 by the at least one set of holding arms, and the end of the corrugated tube can be attached in the attached state. It is equipped with a regulatory protrusion that enters the outer recess and regulates its axial movement.
The two split bodies are provided with an engaging portion and an engaged portion that engage with each other, and can be assembled to each other. The two split bodies are provided with an engaging portion that engages with an engaged portion formed in the other split body at at least one tip of a pair of holding arms of the one split body. The corrugated tube connection body according to claim 1 or 2, wherein the corrugated tubes can be assembled to each other. The waved body according to any one of claims 1 to 3, wherein the two divided bodies can be assembled to each other in a state of being attached to the end of each waved tube. Tube connection. There are few one-to-one pairs of holding arms that hold the outer circumference of the corrugated tube by being attached to the corrugated tube having continuous slits in the longitudinal direction and preventing the slit from expanding. It is a set of anti-spreading tools,
In the set of holding arms, the combined overall arc portion has a length of more than half the circumference of the outer circumference of the corrugated tube.
A regulating protrusion is provided on the inner surface to enter at least two outer surface recesses separated in the axial direction of the corrugated pipe.
The feature is that the two expansion prevention tools can be attached to the corrugated pipe in a state where each of the restricting protrusions is inserted into the same outer surface recess of the corrugated pipe without interfering with each other. A tool to prevent the expansion of corrugated pipes. The expansion prevention tool for a corrugated tube according to claim 5, wherein the two expansion prevention devices each have an engaging portion and an engaged portion that can be assembled by engaging with each other. An expansion prevention tool that is attached to a corrugated pipe having a continuous slit in the longitudinal direction to prevent expansion of the slit.
At least one pair of holding arms that hold the outer circumference of the corrugated tube is provided, and a regulating protrusion that enters the outer surface recess of the corrugated tube is provided on the inner surface.
The at least one set of holding arms forms an arcuate inner surface having a length exceeding half the circumference of the outer circumference of the corrugated tube.
The two expansion prevention tools are, respectively, an expansion prevention tool for a corrugated tube having an engaging portion and an engaged portion that are engaged with each other and can be assembled in a cylindrical shape.

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