JP2001330176A - Piping material supporting device in underground buried boxes - Google Patents

Abstract

PROBLEM TO BE SOLVED: To absorb vertical and horizontal tremor due to uneven settlement, an earthquake or the like and even fore and aft movement when connecting a sheath pipe for housing cables to an underground buried box. SOLUTION: This device is provided with a double cylinder shaped flexible cut-off joint 10 attached so as to flexibly bend to an inner face of a connection opening H opened in the underground buried box B, a duct sleeve 1 with an end part placed inside the underground buried box B and connectively fixed to the flexible cut-off joint 10, and a pipe support mechanism 20 linked to the duct sleeve 1, individually laying and fixing the sheath pipe 3 and a sheath pipe duct sleeve, and blocking off an exterior and an exterior of the underground buried box B. The pipe support mechanism 20 comprises a cylindrical support base 21 contracting and expanding so as to supportively connect to the duct sleeve 1, a block packing 28 blocking off an interior of the support base 21, and a pipe material mounting band means 31 linked to the support base 21 for holding the sheath pipe 3 and the duct sleeve 4 for the sheath pipe inserted through the block packing 28. The piping material mounting band means 31 is provided with a fixing bolt 35 and a wound cylindrical mounting base band 32 supporting the sheath pipe 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground box such as a handhole installed underground for branching, aggregating, and relaying various cables such as optical fibers for communication. In order to protect the various cables from being inserted, waterproof, rat-proof, and sand-proofing were performed at the drawn-in part of the synthetic resin pipe called so-called sheath pipe, and it was stored inside even if the ground subsided or rolled. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a duct material supporting apparatus for a telescopic and flexible underground buried box which can follow a sinking / rolling phenomenon at the time of an earthquake or the like so that cables can be sufficiently protected.

[0002]

2. Description of the Related Art Conventionally, various cables are branched, aggregated,
When the cables are pulled into the handhole for relaying or the like, these cables are drawn through a synthetic resin pipe such as a vinyl chloride resin or a polyethylene resin, which is called a sheath pipe, and are passed through the sheath pipe. The sheath tube itself is inserted and connected to the hand hole by fixing and connecting the large-diameter duct sleeve housed in the above to the insertion opening formed in the side wall of the hand hole in a tight state by a concrete stopper or the like. In addition, because these are buried in the ground, it is said that it is necessary to reliably prevent infiltration of moisture in the soil, intrusion of sediment, etc. in the connection part between the sheath and the handhole side wall,
Various waterproof fixing devices for that purpose have been proposed and implemented as being provided in a duct sleeve.

[0003] Further, in the conventionally proposed waterproof fixing device, a synthetic resin tube, which is a sheath tube connected between handholes installed at intervals of several hundred meters, is used between summer and winter. In order to cope with this expansion and contraction, it has been installed in a duct sleeve with its elasticity allowed.

[0004]

However, in the above-mentioned conventional waterproof fixing device, even if elasticity of the pod tube itself is taken into account and allowed, the pod is naturally settled due to its soft ground. In the event of squatting phenomena such as unequal settlement due to being installed at the bridge / general road boundary of a bridge, or even an earthquake, etc., a handhole and a duct sleeve etc. Since each of them moved and vibrated separately, their connection parts were broken or damaged. This is a conventional waterproof fixing device, and a duct sleeve or the like is tightly fixed with concrete as described above directly to the pipe opening of the hand hole,
The sheath tube itself is fixedly connected to and supported by a waterproof pipe fixing member installed at the duct sleeve opening, so that the handhole is directly fixed to the duct sleeve, sheath tube, etc. And the handhole and the pipe material move individually to follow the settlement, vibration, etc.
This is because it did not vibrate.

In addition, when a duct sleeve, sheath, or the like is inserted into the side wall of the handhole and retracted, the duct sleeve, sheath, or the like hits the edge of the opening and is damaged. Inconveniences such as damage to the edge of the paper.

Accordingly, the present invention has been made in view of the above-described various existing circumstances, and has a connection port which is a pipe opening formed in an underground box such as a handhole. A flexible water-tight joint, which is a flexible connecting means that follows sinking, vibration, etc., is disposed, and an earthquake-resistant duct sleeve is fixed to the flexible water-tight joint, and sheath pipes are respectively set in the duct sleeve. The pipes are fixed by allowing the elasticity of the pipes, which can absorb vertical and horizontal swings caused by uneven settlement, earthquakes, etc., and movement in the pipe connection direction (front and back), and also damage and fix sheaths and pipes due to pipe openings. It is an object of the present invention to provide a pipe material support device for an underground buried box capable of preventing the inner edge of a pipe opening from being damaged by metal fittings.

[0007]

In order to solve the above-mentioned problems, according to the present invention, an inner surface of a connection port H opened to an underground burying box B buried underground is flexibly bent. The double-tubular flexible watertight joint 10 to be mounted and the end portion are disposed in the underground buried box B, and are inserted into the flexible watertight joint 10 from outside the underground buried box B and connected and fixed. A large-diameter duct sleeve 1 and a sheath pipe 3, which is a pipe material, or a small-diameter sheath duct sleeve 4 for allowing the sheath pipe 3 to extend and contract, are separately fixed to the pipes, respectively. And a piping support mechanism 20 that is closed to communicate with the duct sleeve 1. The flexible water-stopping joint 10 is connected to the inside of the cylindrical inner connecting tube portion 12 inscribed on the inner surface of the connection port H from the inner edge of the inner connecting tube portion 12,
A joint body 11 made of an elastic material, which is formed in a double cylindrical shape by arranging a frusto-conical cylindrical connecting portion 13 having a gradually decreasing diameter toward the outer side of the underground box B, A substantially C-shaped end-shaped circular ring 15 for abutting the inner surface of the inner cylinder portion of the joint body 11 by a resilient expanding action to press the inner cylinder portion 12 against the inner surface of the connection port H; And a cylindrical protective ring 16 that is fitted around the outer periphery of the peripheral connecting cylinder portion of the joint body 11. The pipe support mechanism 20 includes a substantially cylindrical support base 21 that is contracted and expanded and supported and connected to the duct sleeve 1 by the inside or outside of the duct sleeve 1.
A closing packing 28 for closing the opening inside the support base 21; a sheath tube 3 inserted through the closing packing 28;
Holding and fixing the sheath 4 for the duct sleeve 4
1 and a tube material attaching band means 31 connected to the tube material. The support base 21 is disposed on the inner side of the underground buried box B, and a substantially C-shaped mounting ring 22 that is reduced and expanded so as to be pressed against the inner side surface or the outer side surface of the duct sleeve 1. It is almost C-shaped that shrinks and expands,
A support ring 23 integrally connected to the mounting ring 22 via a connecting piece 24, and the support ring 23 and the connecting piece 2
Operation unit 2 for reducing / expanding mounting ring 22 via 4
And 5. The closing packing 28 has a substantially circular shape having an outer diameter slightly larger than the inner diameter of the support ring 23, and the number of the sheaths 3 to be inserted and supported, the number of the sheath duct sleeves 4, and an appropriate number corresponding to the insertion position. Insertion hole 29
Can be formed of a flexible and appropriately thick disk-shaped sponge rubber which is freely perforated. The tube material mounting band means 31 is a wound cylindrical mounting base band 32 through which the sheath tube 3 or sheath tube duct sleeve 4 inserted through the closing packing 28 is inserted, and the mounting base band 32 is connected and fixed to the support ring 23. And a fixing bolt 35.

[0008] In the pipe material supporting apparatus for the underground buried boxes according to the present invention configured as described above, the sheath material 3 which is a pipe material which is expanded and contracted, for example, a pipe made of polyethylene resin, is flexible. Duct sleeve 1 supported by water joint 10
Is connected and fixed by the piping support mechanism 20 fixed to the underwater buried box B by the flexibility of the flexible watertight joint 10, for example, following the vertical and horizontal shaking during an earthquake. Departure, not separated. The flexible watertight joint 10 having a double inner / outer structure is firmly fixed with a circular ring 15 having an end, which presses the outer inner connecting cylinder portion 12 to the inner edge of the opening of the connection port H. Duct sleeve 1 inserted into contact tube portion 13 and piping support mechanism 20 connected and fixed thereto
Can also be bent with respect to the underground box B in any of the up, down, left, and right directions, and is connected to the connection port H. The pipe support mechanism 20 is firmly connected and fixed to the duct sleeve 1 by the support base 21 contracted and expanded by the operation unit 25, and is inserted through the closing packing 28 mounted and fixed in the support ring 23 of the support base 21. Each of the pipe members (3, 4) is individually connected and supported by the pipe member attaching band means 31. At this time, for example, the sheath tube 3
Is fixed directly, and on the downstream side, the sheath tube 3 is slidably inserted and supported in the fixed sheath tube duct 4, so that expansion and contraction along the upstream and downstream of the sheath tube 3 itself is not hindered. The support base 21 reduces and expands the support ring 23 and the mounting ring 22 by operation of the operation unit 25, thereby reliably and smoothly connecting and fixing the duct sleeve 1 to the inside of the closing packing 28, and the like. The pipe material (3, 3) inserted into the closing packing 28 for blocking the inside and outside of B
4) is left to the flexible support by the flexible watertight joint 10. At this time, each of the pipe members (3, 4) is separately supported by the pipe mounting band means 31 by the pipe support mechanism 20.
Is securely connected to and supported by the support ring 23 of the first embodiment.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The reference symbol B shown in the drawing indicates, for example, the presence or absence of traffic congestion and other road conditions.
A handhole buried in the ground such as a roadside zone used for collecting, branching, and relaying various cables F, which are optical fibers for communication when performing traffic control or the like using traffic signals. It is a box buried underground. A connection port H formed in the side wall of the underground box B is formed to substantially hermetically shield the inside and outside of the underground box B, and expands and contracts along the inside and outside directions of the underground box B. The cables F are inserted, for example, separately in a state where the cables F can be tilted and swung in the vertical and horizontal directions of the box B.

The duct sleeve 1 itself covers the outer periphery of the large-diameter duct sleeve 1 for earthquake resistance which is connected and fixed to the outside at the connection port H in such a manner that the duct sleeve 1 itself can be tilted and swung in vertical and horizontal directions. It is connected and supported by the water stop joint 10. Further, in the duct sleeve 1, for example, a substantially ring-shaped or spiral-shaped reinforcing rib along the cylinder length direction is formed on the outer periphery, and is referred to as a rib pipe for a cable conduit buried underground. The rib pipe member 2 is fitted in a substantially watertight manner in a slidable state.
For example, an appropriate number of sheaths 3 made of a synthetic resin such as a polyethylene resin for accommodating the cables F, for example, are inserted thereinto to house and pipe them. The sheath tube 3 itself is
Since the underground burying boxes B buried at predetermined intervals are expanded and contracted by, for example, a temperature difference, the underground burying boxes B located on the upstream side are fixedly supported by the pipe support mechanism 20 described later. In the underground buried box B located on the downstream side, the sheath pipe duct sleeve 4 is fixedly supported by a similar pipe support mechanism 20, and the sheath pipe 3 is telescopically slid in the sheath pipe duct sleeve 4. (See FIG. 9). When the duct sleeve 1 is attached to the connection port H by the flexible watertight joint 10, the duct sleeve 1 is mounted inside and outside the underground buried box B, and is inserted and arranged from outside to inside. ing.

When the duct sleeve 1 itself is inserted through the connection port H, the diameter thereof is increased so that the rib pipe material 2 is fitted and inserted in an outer portion disposed outside the underground buried box B. The connection port H inside the underground buried box B
The inside portion disposed inside the inside has a small diameter through the constricted portion and is formed in a step shape as a whole.

As shown in FIGS. 1 and 7, the flexible watertight joint 10 is inserted into a cylindrical inner cylinder 12 inscribed on the inner surface of the connection port H from the inner edge of the inner cylinder 12. A joint body made of an elastic material, which is formed in a double cylindrical shape by continuously disposing a circumferentially connecting cylindrical portion 13 having a frusto-conical cylindrical shape having a gradually decreasing diameter toward the outer side of the underground burying box B. And a substantially C-shaped end that abuts the inner surface of the inner cylindrical portion of the joint body 11 by a resilient expanding action to press the inner cylindrical portion 12 against the inner surface of the connection port H. The circular ring 15, a cylindrical protective ring 16 fitted around the outer peripheral cylinder 13 of the joint main body 11, and furthermore, the outer peripheral cylinder 13 is attached to the outer periphery of the peripheral cylinder 13 of the joint main body 11. 13 and a tightening band 17 for firmly fixing the duct 13 to the duct sleeve 1.

The joint body 11 is made of, for example, EPDM rubber, which is excellent in weather resistance and chemical resistance, and is formed integrally with the inner cylinder part 12 and the peripheral cylinder part 13. A stopper 14 abutting on the outer surface of the underground box B at the edge is formed in a flange-like manner at the edge of the inner cylinder portion 12. The joint body 11 itself is fitted into the connection port H from the outside of the underground buried box B.
By being fitted from the outer edge of the opening to the middle position of the connection port H itself and further to a position beyond the middle position, the stability of the fitted state is improved.

The end-shaped circular ring 15 is formed by winding a strip having a corrugated shape in cross section so as to make itself rigid as shown in FIG. The inner cylinder 12 is forcibly inscribed on the inner surface of the connection port H. That is, the constricted end-shaped circular ring 15 is supported by a predetermined expansion / reduction jig (not shown), and is disposed inside the inner cylinder portion 12 of the joint main body 11. The endless circular ring 15 itself is expanded by the expanding action on the opening / reducing jig to forcibly press the inner connecting cylinder portion 12 against the inner side surface of the connection port H so that the expanded state is maintained. After the engagement is fixed, the expansion / reduction jig itself is contracted to be removed from the inner cylinder 12. At this time, the pressing inscribed action by the end circular ring 15 is applied to the inner cylindrical portion 1 on the rough inner surface of the connection port H.
2 is pressed to prevent its detachment, and the end-shaped circular ring 15 itself is reusable.

The protective ring 16 is made of a soft foam synthetic resin, for example, polyethylene foam, and the inner peripheral surface of the protective ring 16 itself is brought into contact with the outer peripheral surface of the peripheral cylindrical portion 13 which is a conical surface. The outer peripheral surface is a cylindrical surface of the same diameter so as to abut against the inner peripheral surface of the inner cylinder 12, and the inner cylinder 1 in the joint body 11 is formed.
It is forcibly inserted into the gap between the inner cylinder 2 and the peripheral cylinder 13 so as to protect the rubber inner cylinder 12, the peripheral cylinder 13 and the like from earth and sand, rubble and the like in the soil. Has become. If necessary, the outer peripheral surface of the peripheral cylinder portion 13 of the joint body 11 is fastened by a tightening band 17 that is fitted into a positioning groove formed in the outer peripheral surface, so that the tightened portion of the peripheral cylinder portion 13 is tightened. By being partially crushed, the duct sleeve 1 is securely fastened and fixed to the outside.

The inner edge of the connection port H has a substantially L-shaped cross section having a flange abutting on the outer peripheral edge of the inner port of the underground box B so as to prevent damage to the opening edge of the connection port H of the underground box B. A corner cover 18 made of a rigid material having a shape is fitted and mounted.

In the duct sleeve 1 thus supported in the connection port H by the flexible watertight joint 10, an appropriate number of sheath pipes 3 and further sheath tubes inserted into the rib pipe material 2 are provided. A piping support mechanism 20 for supporting each of the duct sleeves 4 individually on the duct sleeve 1 is provided. As shown in FIGS. 1 to 6, the piping support mechanism 20 is provided with a duct sleeve 1 inside or outside the duct sleeve 1.
A substantially cylindrical support base 21 supported and connected to the base, a closed packing 28 for closing an opening inside the support base 21, a sheath tube 3 inserted into the closed packing 28, and a sheath pipe duct. A tube mounting band means 31 for holding and fixing the sleeve 4 and connecting the sleeve 4 to the support base 21 is provided.

The support base 21 is disposed on the inner side of the underground box B and a substantially C-shaped mounting ring 22 which is reduced and expanded so as to be pressed against the inner or outer surface of the duct sleeve 1. The support ring 23 is connected to the mounting ring 22 via a connecting piece 24, and has a substantially C-shape that is reduced or expanded by the connecting ring 24, and the mounting ring 22 is connected via the supporting ring 23 and the connecting piece 24. And an operation unit 25 for reducing and expanding.

The mounting ring 22 shown in the drawing has an outer diameter that is not extremely large as compared with the inner diameter of the duct sleeve 1 so as to press against the inner surface of the duct sleeve 1, and winds a band plate having a predetermined width. C that has a notch
When it is reduced by the operation unit 25, it becomes smaller than the inner diameter of the duct sleeve 1, and is inserted into the duct sleeve 1 in that state. A non-slip packing 22A is mounted on the outer peripheral surface so that the inner surface of the duct sleeve 1 is not damaged when pressed against the inner surface of the duct sleeve 1 and is pressed tightly and stably. Although not shown, the mounting ring 22
Can be formed so as to be pressed against the outer surface of the duct sleeve 1. In this case, the inner diameter of the mounting ring 22 is formed to substantially correspond to the outer diameter of the duct sleeve 1 when it is reduced, and Is mounted with the packing 22A.

The support ring 23 is reduced by the operation unit 25.
By being disposed inside the support ring 23 by an expanding operation, a group of a plurality of sheath pipe duct sleeves 4 to be inserted and supported is tightened around the closed packing 28 surrounding the sheath pipe 3 to bury the ground. The inside and outside of the buried box B are shut off, and the work of attaching to the duct sleeve 1 is performed, and the tube material attaching band means 31 for separately supporting the sheath tube 3, the sheath duct sleeve 4 and the like are connected. The support ring 23 itself is formed in a C-shape having a cutout portion by winding a band plate having a predetermined width, similarly to the mounting ring 22, and the cutout portion is widened or narrowed. The support ring 23 itself is contracted and expanded.

The support ring 23 and the mounting ring 22 are integrally connected by a connecting piece 24 in a state where the centers of the support ring 23 and the mounting ring 22 are aligned with each other. Is the mounting ring 22
The connecting piece 24 itself is formed substantially in an L-shape when viewed from the side, and the mounting ring 22 is formed by, for example, five connecting pieces 24 radially arranged at equal intervals. And the support ring 23 are connected.

The operating portion 25 is configured to expand or reduce the width of the notch by rotating an operating screw 27 which is screwed between a pair of operating pieces 26 which are connected to the notch edges of the support ring 23 so as to face each other. The support ring 23 itself is contracted / expanded by narrowing. The operation piece 26 itself has a substantially L-shaped cross section in consideration of its robustness.

The closing packing 28 has a substantially circular shape having an outer diameter slightly larger than the inner diameter of the support ring 23 in the pipe support mechanism 20, and has a sheath 3 to be inserted and supported.
An appropriate number of insertion holes 29 corresponding to the number of sheath pipe duct sleeves 4 and their insertion positions are formed of a flexible and flexible material formed in advance, for example, a disc-shaped sponge rubber having an appropriate thickness. . And this closed packing 28 itself,
By being wound around the inner peripheral surface of the support ring 23, the support ring 23 is attached and connected to the pipe support mechanism 20. The insertion holes 29 are formed in advance in accordance with the number, the insertion position, and the diameter of the sheath tube 3 or the sheath tube duct sleeve 4 at the installation site, and are preferably sealed so that the sheath tube 3 and the like are sealed after being inserted. They are perforated in a size that is forcibly inserted by making them slightly smaller in diameter than their outer diameters. In addition, the arrangement form is, for example, provided in the peripheral portion in the illustrated example as being six in number, but it is needless to say that the arrangement is not limited to this. The corresponding insertion hole 29 may be opened in advance. The insertion holes 29 that are not used at the time of installation are appropriately closed, so that they are opened, for example, in a knock-out manner at the time of increased use at a later date. Although not shown, the insertion hole 29 may be drilled at the work site, and a mark such as the drilling position and diameter may be displayed in advance so as to cope with such a situation. In the case of, it is not opened and remains closed by the material of the closing packing 28 itself.

The tube mounting band means 31 is mainly for mounting the sheath tube 3 and the sheath tube duct sleeve 4 which are inserted and piped around the peripheral portion of the closing packing 28. Therefore, as shown in FIG. 2 and FIG. 3, a wound cylindrical mounting base band 32 through which the sheath tube 3 and the sheath tube duct sleeve 4 are inserted, and a fixing bolt 35 for connecting and fixing the mounting base band 32 to the support ring 23. And comprising.

The mounting base band 32 is formed by winding the sheath tube duct sleeve 4 or sheath tube 3 and forming a substantially Ω shape in which the clamping portions connected to the respective ends are screwed 33 by, for example, bolts and nuts. ing. The fixing bolt 35 is integrally fixed, for example, by welding or the like to a connecting piece 34 continuously provided from one of the holding portions of the mounting base band 32, and is fixed to a fixing hole 36 formed in the support ring 23 itself. After being inserted from the inside of the support ring 23, it is fixed by a nut screwed from the outside of the support ring 23. The fixing holes 36 shown in the figure are the number of sheath pipe duct sleeves, sheath pipes, etc.,
At least one of them corresponds to the number of the tube material attaching band means 31 or the like, and at least one of them is formed in a slit shape communicating with the side edge of the support ring 23 so that the sheath tube duct sleeve 4 is finally fixed and supported during the fixing support operation. Consideration is given so that it is possible to cope with difficulties in movement, movement, etc. of the sheath tube 3 or the like.

As shown in FIG. 8, in the underground buried box B on the upstream side and the downstream side in which a predetermined pipe distance is set and buried, as described above, for example, the sheath pipe 3 is fixed at the upstream side. Therefore, the mounting base band 32 of the pipe material mounting band means 31 in the pipe support mechanism 20 corresponds to the outer diameter of the sheath tube 3. Also, in the downstream side, the sheath tube duct sleeve 4 which is slightly larger in diameter than the sheath tube 3 is fixed so that the sheath tube 3 can be slidably inserted (see the enlarged view part in FIG. 8). The mounting base band 32 of the pipe material mounting band means 31 in the pipe support mechanism 20 corresponds to the outer diameter of the sheath tube duct sleeve 4. That is, the pipe support mechanisms 20 on the upstream side and the downstream side are substantially the same except that the diameters of the components are different.

Next, an example of use of the embodiment configured as described above will be described. First, a predetermined wiring distance interval is set in accordance with the wiring condition of the cables F and the cable F is buried in the ground. Attach the flexible watertight joint 10 to the connection port H opened in the side wall of the underground buried box B
The duct sleeve 1 in which the rib pipe material 2 is inserted and connected to the free opening end side so as to be connected between the underground buried boxes B is inserted into the circumferentially connected cylindrical portion 13 of the flexible watertight joint 10. Fixed connection. In addition, the support base 21 of the pipe support mechanism 20 which has been reduced in advance by operation of the operation unit 25 is fitted into an end of the duct sleeve 1 inside the underground box B to support the pipe with respect to the duct sleeve 1. The pipe support mechanism 20 is connected to the duct sleeve 1 by releasing the restriction by the operation unit 25 at a predetermined position where the mechanism 20 is fixedly connected.
The support ring 23 is located forward.

For example, in the underground buried box B buried on the upstream side, the end of the sheath pipe 3 inserted through the rib pipe material 2 is inserted through the connection port H, and the sheath pipe 3 is inserted. Insertion holes 2 corresponding to the arrangement form, number, diameter and size of
A closed packing 28 in which a hole 9 is formed in advance is prepared and arranged, and the closed packing 28 is arranged in the support ring 23 of the pipe support mechanism 20 such that the sheath tube 3 is inserted into each of the insertion holes 29. Then, the pipe material attaching band means 31
The respective sheath tubes 3 are connected and fixed to the support ring 23 by this. At this time, the mounting base band 32 of the tube material mounting band means 31 is held and fixed to each of the sheath tubes 3, and the mounting base band 32 is fixed to the support ring 23. The sheath tube 3 is connected to and fixed to the support ring 23 by inserting a fixing bolt 35 into the hole 36 and fixing it with screws using a nut or the like.

On the other hand, in the underground buried box B buried on the downstream side, the end of the sheath 3 inserted and piped into the rib conduit member 2 is slidably inserted into the sheath 4 of the sheath. With the sheath tube duct sleeve 4
Is inserted into the connection port H, and the closed packing 28 in which the insertion hole 29 is formed in advance in accordance with the arrangement, number, diameter and the like of the sheath duct sleeve 4 is formed. The closed packing 28 is fixed to the support ring 23 of the pipe support mechanism 20 such that the sheath packing duct 28 is inserted into each of the insertion holes 29 and is prepared. Next, each sheath pipe duct sleeve 4 is fixed by the pipe support mechanism 20.
Since it is not substantially different from the operation of fixing the sheath 3 on the upstream side, detailed description thereof is omitted.

If the number of cables F or the like permitted by the closing packing 28 is less than the number of insertions, the pipe 3, the sheath duct sleeve 4 and the like are inserted, the insertion holes 29 are not opened and the closing packing 28 itself is used. In the case where the sheath 3 is increased at a later date, the insertion hole 29 is newly formed to cope with this. Further, the sheath tube 3 may be inserted and fixed in advance so as to be able to cope with an increase in the number of cables at a later date, and the end opening of the sheath tube 3 not used at the time of work is appropriately closed. . In addition, in the underground buried boxes B buried at a predetermined distance from each other, for convenience, one of them is fixed on the upstream side, and the other is slidable on the downstream side, but it is needless to say that the present invention is not limited to this. .

The support base 21 may be attached to the duct sleeve 1 in a state where the closing packing 28 is previously mounted and fixed in the support ring 23, and the support base 21 of the pipe support mechanism 20 may be attached to the outside of the duct sleeve 1. , The support base 21 itself is positioned with respect to the duct sleeve 1 in an expanded state in advance, and then reduced and attached by the operation of the operation unit 25.

[0032]

Since the present invention is constructed as described above, even if the sheath 3 expands and contracts in a considerably long range due to a difference in temperature between summer and winter, for example, the deformation of the sheath 3 is prevented. The cables F housed inside can be reliably protected, and even if the cables F expand and contract, the sealing performance corresponding to this can be sufficiently ensured.
By completely closing the inside of the duct sleeve 10 with the pipe support mechanism 20 provided with the closing packing 28, complete waterproofing is made possible, and furthermore, it is possible to improve the rat-proof, sand-proofing and the like. In particular, since the sheath tube 3 is fixed to the seismic duct sleeve 1 fixed to the flexible watertight joint 10 having flexibility and connected to the underground buried box B with the elasticity allowed, the pipe is fixed unequally. It can absorb vertical and horizontal shaking due to an earthquake and the like, and movement in the pipe connection direction (front and rear), and even a considerably large earthquake can disconnect the underground box B, the duct sleeve 1, the sheath tube 3 and the like from each other. There is nothing. In addition, the number of insertions of the sheath tube 3, sheath tube duct sleeve 4, etc. corresponding to the cables F to be wired is increased / decreased, and a closed packing 28 in which an insertion hole 29 corresponding to the diameter / position is formed is prepared in advance. By doing so, work can be performed quickly. At this time, even if the number of insertions, the diameter, the position, and the like of the number of insertions are variously changed at the site, it is possible to quickly cope with the differences, and the site of each component such as the sheath tube 3, the sheath tube duct sleeve 4, and the like. It is possible to easily cope with changes in different site conditions in each of the sheath 3, the sheath duct sleeve 4, etc. by various combinations of the above.

That is, according to the present invention, a double cylindrical flexible water-stop fitting 10 which is flexibly mounted on the inner surface of the connection port H opened to the underground box B, The pipe sleeve 1 and the sheath tube 3 and the sheath tube duct sleeve 4 which are connected and fixed to the flexible watertight joint 10 are fixed separately to each other. Pipe support mechanism 2 linked to sleeve 1
Because of this, it is possible to smoothly cope with the expansion and contraction of the sheath 3 for storing the cables F for pipe connection in the underground buried box B, uneven settlement, and vertical and horizontal shaking due to an earthquake or the like. In addition, the connection form can be always maintained.

The flexible watertight joint 10 has an inner / outer double structure including an inner connecting cylinder portion 12, a peripheral connecting cylinder portion 13, and the like.
The outer inner connecting cylinder portion 12 pressed against the inner edge of the opening of the connection port H at 5
Since the inner frusto-conical cylindrical contact tube 13 is connected and arranged, the duct sleeve 1 inserted into the peripheral tube 13 and the piping support mechanism 20 connected and fixed thereto are The circumferential contact tube portion 13 exhibiting flexibility enables the underground box B to bend in any direction of up, down, left, and right, and can be connected to the connection port H.

The pipe support mechanism 20 is firmly connected and fixed to the duct sleeve 1 by a support base 21 consisting of a substantially C-shaped support ring 23 and an attachment ring 22 which are contracted and expanded by an operation section 25. 1
Can be connected from any of the inner and outer surfaces at the end of the duct sleeve 1, and work can be performed while the closing packing 28 is mounted in the support ring 23. Moreover, the closed packing 28 is an underground box B
In addition to shutting off the inside and outside, and ensuring waterproof, sandproof, ratproof, etc., the inserted sheath tube 3 and sheath tube duct sleeve 4 are each supported by a tube material attaching band means 31 for separately supporting and fixing them. Since it is connected to the support ring 23 of the base 21, it becomes integral with the support base 21 and follows the duct sleeve 1, the pipe support mechanism 20, etc., which are synchronized with vertical and horizontal swings, etc., from which the sheaths 3, etc. fall off or come off. To prevent it.

[Brief description of the drawings]

FIG. 1 is a side view of a partly cutaway during construction showing one embodiment of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is an exploded perspective view of the pipe support mechanism.

FIG. 4 is a front view of the pipe support mechanism in the pipe support state.

FIG. 5 is a plan view of the same.

FIG. 6 is a side view of the same.

FIG. 7 is an exploded perspective view of the flexible watertight joint.

FIG. 8 is a partially cutaway side view including an enlarged view of a part at the time of construction on the downstream side when the sheath tube is supported in the sheath tube duct sleeve.

FIG. 9 is a partially omitted schematic side view showing the embedding state.

[Explanation of symbols]

B ... Underground buried box F ... Cables 1 ... Duct sleeve 2 ... Rib pipe material 3 ... Sheath pipe 4 ... Sheath pipe duct sleeve 10 ... Flexible watertight joint 11 ... Coupling body 12 ... Inner cylinder part 13 ... Peripheral Contact tube part 14 ... Stopper 15 ... Ended circular ring 16 ... Protective ring 17 ... Tightening band 18 ... Corner cover 20 ... Piping support mechanism 21 ... Support base 22 ... Mounting ring 22A ... Packing 23 ... Support ring 24 ... Linking piece 25 ... Operation part 26 ... Operation piece 27 ... Operation screw 28 ... Closed packing 29 ... Insertion hole 31 ... Tube material attachment band means 32 ... Attachment base band 33 ... Screw 34 ... Connection piece 35 ... Fixation bolt 36 ... Fixation hole

 ──────────────────────────────────────────────────続 き Continuation of the front page (71) Applicant 000151184 Doi Manufacturing Co., Ltd. 4-7-20 Toyo, Koto-ku, Tokyo (72) Inventor Mitsuo Saotome 461-1, Kubota-cho, Tochigi-shi, Tochigi Pref. (72) Inventor Hoshikawa ▲ Today ▼ Fu 1-1-1, Heiwajima, Ota-ku, Tokyo Inside Shinmei Sangyo Co., Ltd. (72) Kunio Hiroe 3--14-6, Shiba, Minato-ku, Tokyo Shintok Kogyo Co., Ltd. (72) Inventor Kazuhiro Iwasaki 4-7-20 Toyo, Koto-ku, Tokyo F-term in Doi Corporation 3H023 AA05 AB07 AC21 AC35 AC75

Claims (6)

[Claims] 1. A double-tubular flexible water-blocking joint flexibly mounted on an inner surface of a connection port opened to an underground buried box buried in the ground, and inside the underground buried box. The end portion is arranged, the duct sleeve which is inserted into the flexible watertight joint from the outside of the underground buried box and connected and fixed, and the pipe material is fixed separately to each other, and the inside and outside of the underground buried box are closed. A pipe material support device for an underground buried box, comprising: a pipe support mechanism connected to a duct sleeve. 2. A flexible water-blocking joint is formed in a cylindrical inner connecting cylinder portion inscribed on an inner side surface of a connection port, continuously from an inner edge of the inner connecting cylindrical portion, on an outer side of the underground box. A joint body made of an elastic material that has a double cylindrical shape by arranging a frusto-conical cylindrical part with a gradually decreasing diameter toward the inner surface of the inner cylindrical part of this joint body A substantially C-shaped end-opened circular ring for expanding and pressing the inner connecting cylinder to press against the inner surface of the connection port by abutting the resilient expanding action, and to the outer circumference of the peripheral connecting cylinder of the joint body. 2. A protection ring having a cylindrical shape fitted therein.
A pipe material support device for an underground buried box as described in the above. 3. A piping support mechanism comprising: a substantially cylindrical support base which is contracted / expanded and supported / connected to the duct sleeve by the inside or outside of the duct sleeve; and a closing packing for closing an opening inside the support base. And a pipe mounting band means for holding and fixing the pipe material inserted through the closed packing and connecting the pipe material to the support base.
Or a pipe material supporting device for an underground buried box according to 2 above. 4. The support base is disposed on an inner side of the underground box, wherein the support base has a substantially C-shaped mounting ring which is reduced and expanded so as to be pressed against an inner surface or an outer surface of the duct sleeve. A support ring integrally connected to the mounting ring via a connecting piece, and an operating unit for reducing and expanding the mounting ring via the supporting ring and the connecting piece. 4. A pipe material supporting device for an underground buried box according to any one of claims 1 to 3, comprising: 5. The closing packing has a substantially circular shape having an outer diameter slightly larger than the inner diameter of the support ring, and an appropriate number of insertion holes corresponding to the insertion positions of the pipe material to be inserted and supported. 5. A pipe material supporting apparatus for an underground buried box according to claim 1, wherein the pipe material supporting apparatus is formed of a disc-shaped sponge rubber having a suitable thickness and being opened and having a suitable thickness. 6. A pipe mounting band means includes a wound cylindrical mounting base band for inserting a pipe material inserted and piped into a closed packing, and a fixing bolt for connecting and fixing the mounting base band to a support ring. A pipe material supporting device for an underground buried box according to any one of claims 1 to 5.