JP2009138355A - C.c.box manhole cover equipped with small working cover - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a C.C.BOX manhole cover equipped with a small working cover, which enables the inside of a manhole to be easily inspected without the opening of the large and heavy manhole cover by additionally providing the manhole cover with another cover for minimum necessary inspection work, which enables the discharge of water accumulated inside the manhole, and which enables internal conditions to be easily inspected and managed by bringing a camera into the manhole. <P>SOLUTION: An entrance of the manhole 2 is equipped with: a manhole cover body 3 for being openably/closably closed; a working opening 5 which is opened in the almost central position of the manhole cover body 3; the small working cover 6 which openably/closably closes the working opening 5, and which is provided with an eyebolt inserting hole 4 for inserting an eyebolt 63 when the working cover 6 is opened; and a fixing implement 11 for fixing a working implement such as a drain hose 23 or an inspection camera 2, which is provided at the downside peripheral edge of the working opening 5. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a manhole cover serving as an entrance / exit of an electric wire common groove, and in particular, an electric wire joint provided with a small work cover capable of inserting a drainage hose of a submersible pump, a work instrument such as an inspection camera, etc. into the manhole cover. It relates to the groove manhole cover.

  The electric wire common groove installed in the electric wire undergrounding area is constructed by laying power cables, communication cables or water and sewage pipes for power supply in a plurality of pipelines provided in the ground. In addition, the conventional water channel is buried in the ground as a drain pipe separately from the electric joint groove. In such an electric wire common groove, a manhole is provided for an operator to enter the groove at the time of internal inspection management and connection of a power transmission line or the like. The manhole cover includes a cast iron manhole cover 51 as shown in the plan view of FIG. 6, or a concrete manhole cover 61 as shown in the perspective view of FIG.

  In addition, a large amount of rainwater or the like tends to accumulate inside the manhole in the electric wire common groove, and the power cable and the communication cable may be flooded. When the submersible pump is not installed in the manhole, it is necessary to open the manhole covers 51 and 61 periodically and put the drain pump to drain the water.

  The manhole covers 51 and 61 are very heavy and cannot be easily opened and closed for accident prevention. Therefore, when opening and closing the manhole cover 61, as shown in the enlarged view of FIG. 8 and the perspective view of FIG. 9, first, wire bolts called eyebolts 63 are attached to the holes 62 provided in two places of the manhole cover 61. . Next, it attaches so that the wire 64 may be spanned over both eyebolts 63. FIG. The wire 64 is lifted by a crane or the like of a UNIC vehicle, and the manhole cover 61 is opened. The operation of opening and closing the manhole cover 61 having such a weight is very complicated and time consuming.

  In the conventional inspection and drainage treatment of manholes, the manhole cover 61 must be opened and closed. Even when water has simply accumulated inside, it is necessary to lift and close the manhole cover 61 with a crane of a UNIC vehicle, which has the problem that it takes a lot of time and labor.

Because of such weight and the fact that several people have to work when opening and closing, a technique for easily opening and closing the manhole cover has been proposed. For example, as shown in Japanese Patent Laid-Open No. 7-229160 “Manhole cover with inspection window” of Patent Document 1, an inspection window is provided on the manhole cover body, and an inspection window cover for closing the inspection window is disposed on the inspection window. The inspection window lid is attached to the manhole cover main wall so that the periphery of the inspection window cover can be freely opened and closed with a hinge, and the other part of the inspection window cover is fixed to the manhole cover main body with a bolt. ing. Since the manhole cover with an inspection window in Patent Document 1 has an inspection window on the manhole cover body, the inspection can be performed through the inspection window without opening the heavy manhole cover body. In the present invention, since the inspection window is closed by the inspection window lid so that it can be opened and closed, the inspection window can be closed except during the inspection, and foreign matter or the like can be blocked from the inspection window. It can be prevented from entering inside.
JP-A-7-229160

  This “manhole cover with inspection window” in Patent Document 1 has an inspection window cover made of cast iron attached to a large manhole cover body so that it can be freely opened and closed. Many of them have a problem that they cannot be easily opened and closed during inspection.

  The present invention has been developed to solve such problems. That is, the object of the present invention is to provide an additional manhole cover for the minimum necessary inspection work, so that the inside of the manhole can be easily inspected without opening the large and heavy manhole cover. An object of the present invention is to provide an electric wire joint groove manhole with a work lid that can drain water accumulated in the manhole and can easily check and manage the inside by inserting a camera inside the manhole.

  According to the present invention, in the electric wire common groove manhole (2) provided in the electric wire common groove laying in the pipe line (8) provided in the ground with an electric power cable, a communication cable, a water and sewage pipe, etc. A manhole cover main body (3) that can be freely opened and closed at the entrance of the manhole (2), and an eye bolt (63) ), An eye bolt insertion hole (4), a work opening (5) opened at a substantially central position of the manhole cover body (3), and the work opening (5). A small lid for work (6) provided with an eyebolt insertion hole (4) into which the eyebolt (63) is inserted, and a drain hose (23) provided for the lower periphery of the work opening (5) or for inspection Secure the work implement such as the camera (21). Fixing jig (11), comprising a electric wire joint groove manhole cover with a working small lid, wherein provided that.

The manhole cover body (3) can have an interlock (7) formed on the surface thereof.
For example, the fixing jig (11) is substantially Y on the lower peripheral edge of the work opening (5) in order to fix a work implement such as the drain hose (23) or the inspection camera (21). A sandwiching member (12) having a letter shape is slidably attached.
The display part of the water level sensor installed in the manhole (2) can be attached to the fixing jig (11).

  In the invention having the above configuration, since the work opening (5) is opened in the manhole cover main body (3), it is not necessary to open the heavy manhole cover main body (3) during inspection and drainage work. Thus, one worker can quickly perform inspection and drainage work by opening the small work lid (6) without moving the unic car as in the prior art. In the internal inspection of the manhole (2), the inspection camera (21) can be inserted through the small work lid (6) and observed. Further, when draining rainwater or the like, it can be easily treated by inserting only the drainage hose (23) of the pump through the work opening (5). It is possible to easily carry out the regular drainage work of the water accumulated in the manhole, and to improve the efficiency of the work.

  In addition, since the fixing jig (11) for fixing the work tool such as the inspection camera (21) or the drainage hose (23) is provided on the lower periphery of the work opening (5), the manhole cover (1 ), The worker can perform other tasks at the same time.

  Electric wire joint groove manhole cover equipped with a small work lid of the present invention, a work opening is opened at a substantially central position of the manhole cover main body, the small work cover is closed in an openable manner in the work opening, inspection, One worker can open the work lid when draining.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of an electric wire co-groove manhole cover provided with a small work cover according to the first embodiment. FIG. 2 is a cross-sectional view of the electric wire common groove manhole.
An electric wire joint groove manhole cover 1 having a small work cover of the first embodiment includes a manhole cover body 3 that can be freely opened and closed at the entrance of the manhole 2, an eyebolt insertion hole 4 provided in the manhole cover body 3, A work opening 5 opened at a substantially central position of the manhole cover body 3 and an eye bolt insertion hole 4 into which the eye bolt 63 is inserted when the work opening 5 is opened and closed freely. A small lid 6 is provided.

As shown in FIG. 9, the manhole cover 1 having such a structure inserts an eyebolt 63 into the eyebolt insertion hole 4 of the manhole cover body 3 to inspect the electric wire common groove manhole 2, and the manhole cover body 3 is lifted and the operator enters through the slot.
An interlocking 7 is formed on the surface of the manhole cover body 3 so as to harmonize with the interlocking of the sidewalk.

  As shown in FIG. 2, each manhole 2 is provided in an electric wire common groove for laying a power cable, a communication cable, etc. for power supply in a conduit 8 provided in the ground.

  A work opening 5 is formed at a substantially central position of the manhole cover body 3 of the present invention. The small work cover 6 is closed in the work opening 5 so as to be freely opened and closed. The small lid for work 6 is also provided with an eyebolt insertion hole 4, and an eyebolt 63 is inserted into the eyebolt insertion hole 4 so that it can be opened by one operator without using any equipment. The manhole 2 is inspected from the work opening 5.

  In this way, the inside of the work opening 5 can be inspected without opening the heavy manhole cover 1, that is, without using equipment, and the efficiency of the inspection work can be increased. For example, in the internal inspection of the manhole 2, the inspection camera 21 can be inserted through the small work lid 6 and observed.

FIGS. 3A and 3B show an electric wire joint groove manhole cover provided with the work small cover of Example 1, FIG. 3A is a sectional view, and FIG. 3B is an enlarged plan view of the work opening before taking out the fixing jig. (C) is an enlarged plan view of the opening for work which took out the fixing jig.
The manhole cover 1 of the first embodiment is provided with a fixing jig 11 for fixing a work implement such as the drainage hose 23 or the inspection camera 21 on the lower periphery of the work opening 5. The fixing jig 11 is provided with a holding member 12 having a substantially Y shape on the lower peripheral edge of the working opening 5 in order to fix a work implement or the like.

  The fixing jig 11 is obtained by engaging a linear portion 14 of the holding member 12 with a guide frame 13 attached to the bottom surface of the manhole cover main body 3. Further, a stopper 15 having a hook shape at one end of the linear portion 14 of the clamping member 12 hits the guide frame 13 and is prevented from coming off. Therefore, the clamping member 12 is configured to slide freely into and out of the work opening 5 on the lower surface of the manhole cover body 3, and can be pulled out and used as necessary. In the state before taking out the fixing jig of FIG. 3B, the fixing jig 11 does not get in the way, and the inside of the manhole 2 can be visually inspected. In the state where the fixing jig 11 of FIG. 3C is taken out, it is possible to work by fixing a work implement such as the drainage hose 23 or the inspection camera 21 to the fixing jig 11. The shape of the holding member 12 of the fixing jig 11 is not limited to the shape of the illustrated example, and can be variously changed.

4A and 4B show the manhole cover body in a state where the inspection camera is fixed to the fixing jig. FIG. 4A is a cross-sectional view, and FIG. 4B is an enlarged plan view of a work opening.
As shown in the drawing, only the small working lid 6 is removed from the working opening 5 and the clamping member 12 of the fixing jig 11 is pulled out. The camera cable 22 that suspends the inspection camera 21 is fixed to the drawn clamping member 12. In the illustrated example, a state in which the camera cable 22 is simply sandwiched between the clamping members 12 is shown, but a pulley (not shown) is attached to the fixing jig 11 and the camera cable 22 is wound around the pulley. It is also possible to do.

FIGS. 5A and 5B show the manhole cover body in a state where the drainage hose is fixed to the fixing jig. FIG. 5A is a cross-sectional view and FIG.
A large amount of water such as rainwater tends to accumulate in the electric wire common groove manhole 2. When the power cable and communication cable are flooded due to the accumulated water in the manhole 2, regular drainage is required. Therefore, as shown in the figure, the drainage hose 23 of the pump can be fixed to the clamping member 12 of the fixing jig 11 and drained. Further, when draining rainwater or the like, it can be easily treated by simply inserting the drainage hose 23 from the work opening 5. The regular drainage operation of the water accumulated in the manhole 2 can be easily performed, and the efficiency of the operation can be improved.

  A display unit (not shown) of a water level sensor installed in the manhole 2 can be attached to the fixing jig 11. Furthermore, various instruments necessary for inspection in the manhole 2 can be attached.

  In addition, the electric wire joint groove manhole cover provided with the small work cover of the present invention opens the large and heavy manhole cover main body 3 by providing the manhole cover 1 with a work opening 5 for the minimum necessary inspection work. If the inside of the manhole 2 can be easily inspected, the water accumulated in the manhole 2 can be drained, and the inside of the manhole 2 can be easily inspected and managed by inserting the camera 21 therein, the above-mentioned Of course, the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the scope of the present invention.

  The electric wire joint groove manhole cover provided with the working small lid of the present invention can be used for manholes other than the electric wire groove.

It is a perspective view of the electric wire joint groove manhole cover provided with the small work lid of Example 1. It is sectional drawing in an electric wire joint groove manhole. The electric wire joint groove manhole cover provided with the small work lid | cover of Example 1 is shown, (a) is sectional drawing, (b) is an enlarged plan view of the work opening before taking out a fixing jig, (c) ) Is an enlarged plan view of the work opening from which the fixing jig is taken out. FIG. 4A shows a manhole cover body in a state where an inspection camera is fixed to a fixing jig. FIG. 4A is a cross-sectional view, and FIG. The manhole cover main body of the state which fixed the drainage hose to the fixing jig is shown, (a) is sectional drawing, (b) is an enlarged plan view of the opening for work. It is a top view which shows the manhole cover made from cast iron. It is a perspective view which shows the manhole cover made from concrete. It is an expansion perspective view which shows the insertion hole of an eyebolt and a manhole cover. It is a perspective view which shows the state which lifted the manhole cover with the wire.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Manhole cover 2 Manhole 3 Manhole cover main body 4 Eyebolt insertion hole 5 Work opening 6 Work small lid 7 Interlocking 8 Pipe line 11 Fixing jig 12 Clamping member 21 Inspection camera 23 Drain hose

Claims (4)

An electric wire common groove manhole (2) provided in an electric wire common groove laying in a conduit (8) provided in the ground with an electric power cable, a communication cable, a water and sewage pipe, etc.
A manhole cover body (3) which is openably and closable at the entrance of the manhole (2);
An eyebolt insertion hole (4) provided in the manhole cover body (3), into which the eyebolt (63) is inserted when the manhole cover body (3) is lifted;
A work opening (5) opened at a substantially central position of the manhole cover body (3);
A small working lid (6) provided with an eyebolt insertion hole (4) that is closed to the working opening (5) so as to be opened and closed and into which the eyebolt (63) is inserted when the opening is opened;
A fixing jig (11) for fixing a work implement such as a drainage hose (23) or an inspection camera (21) provided on the lower peripheral edge of the work opening (5). Electric wire joint groove manhole cover with a small work lid.   The electric joint grooved manhole cover provided with the small work cover according to claim 1, wherein the manhole cover body (3) has an interlocking (7) formed on a surface thereof.   The fixing jig (11) is substantially Y-shaped on the lower peripheral edge of the work opening (5) in order to fix a work implement such as the drain hose (23) or the inspection camera (21). An electric wire joint groove manhole cover provided with a small work cover according to claim 1, wherein the sandwiching member (12) is slidably attached.   The electric joint grooved manhole cover with a small work cover according to claim 1, wherein a display part of a water level sensor installed in the manhole (2) is attached to the fixing jig (11).

Images