JP2008144357A - Plug device for plugging key hole in manhole - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plug device for plugging a key hole in a manhole capable of preventing it from being worn or chipped even by vehicle traffic. <P>SOLUTION: This plug device 1 for plugging the key hole 41 in a manhole lid 4 having an external lid 40 provided with the key hole 41 and an internal lid 50 positioned below the external lid 40 is provided with a body part 10 inserted into the key hole 41 to plug the key hole 41 and a leg part 20 coming into contact with the internal lid 50 while the body part 10 is inserted into the key hole 41 to position the body part 10 in the key hole 41. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an embolus device for a manhole keyhole.

  As a device for closing the keyhole 41 of the manhole cover 4, a bolt 96 having a head portion 98 locked to the upper edge of the keyhole 41, and the bolt 96 and the nut 95 are tightened by the bolt 96 and the nut 95 to be pushed out in the outer diameter direction. There is a manhole key hole embolizing device 99 provided with a main body portion 97 that prevents the key hole 41 from detaching by urging the inner surface of the key hole 41 (see FIG. 1).

  Further, there is a keyhole cap of a manhole cover that maintains an engaging force to the keyhole by having an elastic holding rib in the center (see Patent Document 1).

Moreover, there is a keyhole plug for manhole cover that expands the outer peripheral surface in the outer diameter direction by bolt tightening and maintains the locking force to the keyhole (see Patent Document 2).
Japanese Utility Model Publication No. 61-50142 Japanese Utility Model Publication No. 3-21464 Japanese Utility Model Publication No. 3-69046 Japanese Patent Laid-Open No. 10-205184 Japanese Utility Model Publication No. 6-12543

  Conventionally, a manhole cover provided in a manhole has been provided with a keyhole. This key hole is used for inserting a hand key such as a pickaxe and engaging its tip with the lower edge of the key hole to cause a manhole cover to be opened. In addition, in order to prevent a person other than the related person from using this keyhole to open the manhole cover without permission, it has been conventionally performed to use a manhole keyhole embolic device to close the keyhole. .

  Here, the conventional manhole key hole embolus device is provided with a head portion that is locked to the upper edge of the key hole in order to maintain the manhole key hole embolus device in the key hole. The head is used when the manhole key hole embolus device is removed from the key hole. However, since the head protrudes from the upper part of the manhole, the head is worn or lost due to the passage of the vehicle or the like, and it may be difficult to remove the embolus device for the manhole keyhole. As a result, the keyhole cannot be used, and it is difficult to open the manhole cover.

  In view of the above-described problems, an object of the present invention is to provide a manhole key hole embolizing device that is not worn or lost even when a vehicle passes.

  In order to solve the above-described problems, the present invention eliminates the head from the conventional configuration by providing a leg portion that positions the main body portion in the keyhole in a state where the main body portion is inserted into the keyhole. This makes it possible to provide a manhole key hole embolizing device that is not worn or lost even when the vehicle passes.

Specifically, the present invention provides a manhole keyhole embolizing device for closing the keyhole of a manhole cover having an outer lid provided with a keyhole and an inner lid positioned under the outer lid, A manhole comprising: a main body portion inserted into the hole and closing the key hole; and a leg portion contacting the inner lid in a state where the main body portion is inserted into the key hole and positioning the main body portion in the key hole It is a keyhole embolic device.

  The embolus device for a manhole keyhole according to the present invention is a head for positioning the main body portion in the keyhole by engaging with the upper edge of the conventional keyhole as a configuration for positioning the main body portion in the keyhole ( In place of (see FIG. 1), a leg portion is employed that positions the main body portion within the key hole of the outer lid by contacting the inner lid.

  By adopting such a configuration, the head and the upper part of the main body do not protrude above the keyhole entrance, which is a problem in conventional manhole keyhole embolization devices, wear and loss due to vehicle traffic etc. It became possible to prevent.

  The embolus device for a manhole keyhole may further include a height adjusting unit that adjusts a height from an end of the leg portion in contact with the inner lid to an upper surface of the main body portion.

  According to the present invention, even when the distance from the keyhole entrance of the manhole outer lid to the upper surface of the inner lid differs for each manhole lid, the main body portion is positioned in the keyhole with the legs in contact with the inner lid. It is possible to adjust the height of the manhole key hole embolic device so that the upper surface of the main body does not protrude from the key hole inlet. That is, even when the manhole key hole embolic device is installed in a manhole cover whose distance from the keyhole entrance to the upper surface of the inner cover differs for each manhole cover, the effect of preventing wear and loss due to passage of the vehicle, etc. Can be obtained.

  In addition, the height adjusting means may be configured such that a height from an end of the leg portion contacting the inner lid to an upper surface of the main body portion is determined by a screwing depth of a screw structure that the main body portion and the leg portion are screwed to each other. You may adjust the thickness.

  By adopting a configuration in which the height is adjusted according to the screwing depth of the screw structure, simple and fine height adjustment is possible.

  The leg may further include a contact end elastic member at an end in contact with the inner lid.

  Since the embolus device for manhole keyhole according to the present invention is in contact with the upper surface of the inner lid, it is affected by vibrations caused by passage of the vehicle through the inner lid. Here, by providing an elastic member at the end in contact with the inner lid, it becomes possible to reduce the influence of this vibration.

  The main body may further include a main body side elastic member biased to the inner surface on a side surface in contact with the inner surface of the keyhole.

  The main body side elastic member fixes the main body portion in the key hole by urging the inner side surface of the key hole. According to the present invention, by adopting this body side elastic member, the member pushed out by the screw tightening provided in the conventional manhole key hole embolizing device is pressure-bonded to the inner surface of the key hole, and the manhole key hole A mechanism for fixing the embolus device in the key hole can be omitted. As a result, the tightening by the screw is loosened due to vibrations caused by the passage of the vehicle, etc., and there is no problem such as a decrease in pressure-bonding force on the inner surface of the keyhole (that is, fixing force in the keyhole). The fixing force to is maintained. Further, the configuration of the entire apparatus is simplified, and it is possible to obtain effects such as improvement of durability in an environment such as exposure to wind and rain, sand entering, and reduction of manufacturing costs.

  Moreover, the said main-body part may further have the to-be-latched means which the operating device used when removing the said embolus device for manhole key holes from the said key hole latches.

Moreover, the said latching means may be provided in the circumferential direction on the inner surface of the recessed part provided in the upper surface of the said main-body part, and the groove part which the said operating device latches may be sufficient as it.

  According to the present invention, it is possible to easily remove the manhole key hole embolus device from the key hole by providing a configuration in which the operation device for removal is locked.

  According to the present invention, it is possible to provide a manhole key hole embolizing device which is not worn or lost even when a vehicle is passed.

  Embodiments of the present invention will be described with reference to the drawings.

<First embodiment>
First, the configuration of the manhole key hole embolus device 1 and its operation device 30 according to the present embodiment will be described. FIG. 2 is a diagram showing a configuration of the manhole key hole embolization device 1 according to the present embodiment. A manhole cover 4 installed in a manhole provided for inspecting and repairing underground power transmission lines is provided with a key hole 41 for inserting a hand key such as a pickaxe to lift and open the manhole cover 4. It has been. The manhole key hole embolization device 1 is a device for closing the key hole 41. The manhole key hole embolization device 1 includes a main body 10 and a leg 20. The main body 10 includes a rubber packing 11 (corresponding to the main body side elastic member of the present invention) provided around the main body 10, a screw hole 12, a recess 13 provided on the upper surface of the main body 10, and an inner surface of the recess 13. It has the groove part 14 provided in the circumferential direction. The leg portion 20 is a combination of the rubber bottom portion 21 (corresponding to the contact end elastic member of the present invention), the screw 22 screwed into the screw hole 12 of the main body portion 10, and the main body portion 10. It has the support | pillar 23 to support.

  FIG. 3 is a diagram showing a configuration of the operating device 30 of the manhole key hole embolus device 1 according to the present embodiment. The operating device 30 includes a protrusion 31 that engages with the groove 14 of the manhole key hole embolus device 1, a shaft portion 32, and operation handles 33 and 34. The operation handle 34 is formed in a claw shape that scrapes dust out of the groove portion 14.

  Next, a method for using the manhole key hole embolization device 1 and the operation device 30 according to the present embodiment will be described. FIG. 4 is a cross-sectional view showing an outline of the manhole cover 4 and the manhole key embolus device 1 inserted into the manhole cover 4 in the present embodiment. The manhole cover 4 includes an outer cover 40 and an inner cover 50, and a key hole 41 is provided in the outer cover 40.

  An operator puts a hand key such as a pickaxe into the keyhole 41 and lifts the manhole cover 4 to open the manhole cover 4 to perform operations such as inspection and repair. After completion of the work, the manhole cover 4 is installed in the manhole, and the keyhole 41 of the manhole cover 4 is blocked by the manhole keyhole embolizing device 1 so as not to open the manhole cover 4 without permission.

  Here, the operator measures the distance (the distance indicated by the symbol D in FIGS. 4 and 5) from the entrance of the key hole 41 of the manhole outer lid 40 to the upper surface of the inner lid 50 using the scale. Then, the height from the lower end of the leg 20 to the upper surface of the main body 10 is adjusted by adjusting the depth of screwing between the screw hole 12 of the main body 10 and the screw 22 of the leg 20 of the embolus device 1 for manhole keyhole. Let the height be a little shorter than the measured distance D.

FIG. 5 is a diagram showing an outline of a state in which the manhole key hole embolus device 1 is inserted into the key hole 41 in the present embodiment. FIG. 5A is a diagram illustrating a state where the manhole key hole embolus device 1 is inserted into the key hole 41 without adjusting the height. In this state, since the upper surface of the main body portion 10 is located higher than the entrance of the key hole 41, the upper surface of the main body portion 10 may be worn or lost due to the passage of the vehicle or the like. On the other hand, FIG. 5B is a diagram showing a state where the manhole key hole embolus device 1 is inserted into the key hole 41 when the above-described screwing depth is adjusted. The height from the lower end of the leg 20 to the upper surface of the main body 10 is slightly shorter than the distance D from the entrance of the key hole 41 to the upper surface of the inner lid 50, and the upper surface of the main body 10 is slightly lower than the entrance of the key hole 41. Therefore, the upper surface of the main body 10 is not worn or lost due to the passage of the vehicle or the like.

  That is, according to the present embodiment, it is possible to prevent the upper surface of the main body 10 of the manhole key hole embolus device 1 from being worn or missing. Accordingly, it is possible to prevent the manhole key hole embolus device 1 from being difficult to remove when the manhole cover 4 is opened. Moreover, since the shape of the main-body part 10 adapts the shape of the keyhole 41 of the conventional manhole cover 4, the existing manhole cover 4 is replaced or remodeled. The effect of the present invention can be obtained with the manhole cover 4 that has been conventionally installed.

  Further, since the outer periphery of the rubber packing 11 is formed to be slightly wider than the key hole 41, the rubber packing 11 is compressed in a state where the manhole key hole embolus device 1 is inserted into the key hole 41, and the inside of the key hole 41. Energize the sides. By this urging, the main body 10 is fixed in the key hole 41. Further, since it is not fixed using a conventional screw tightening force, it is possible to prevent the manhole keyhole embolus device 1 from being pulled out of the keyhole 41 due to loosening due to vibration caused by the passage of the vehicle or the like.

  Further, the provision of the rubber bottom portion 21 reduces the vibrations caused by the passage of the vehicle or the like from being transmitted to the manhole keyhole embolus device 1 via the inner lid 50, and the manhole keyhole embolus device 1 is It can be prevented from being damaged.

  FIG. 6 is a top view showing a method of removing the manhole key hole embolus device 1 using the operation device 30 in the present embodiment. FIG. 7 is a cross-sectional view showing a method for removing the manhole key hole embolus device 1 using the operation device 30 in the present embodiment. The operator holds the operation handles 33 and 34 and inserts the operation device 30 into the recess 13 on the upper surface of the main body 10 (see FIG. 6A). Thereafter, when the operator holds the operation handles 33 and 34 and rotates the operation device 30, the protruding portion 31 engages with the groove portion 14 (see FIG. 6B). In this state, when the operator holds the operation handles 33 and 34 and pulls up the operation device 30, the projection 31 is engaged with the groove 14, so that the manhole key hole embolus device 1 is pulled out from the key hole 41. It is.

  Even when dust or dirt enters the groove 14 and engagement cannot be obtained, the nail-like operation handle 34 can be used to scrape dust or the like in the groove 14.

  According to this embodiment, the manhole key hole embolus device 1 can be easily removed from the key hole 41. Even if a part of the groove 14 is broken, the manhole key hole embolus device 1 according to the present embodiment can be pulled out using a tool such as a screwdriver. is there.

<Second Embodiment>
FIG. 8 is a diagram showing a configuration of a manhole key hole embolus device 1b according to the present embodiment. The manhole key hole embolus device 1b includes a main body portion 10b and a leg portion 20b. The main body 10b has a rubber packing 11 provided around the main body 10b, a screw hole 12, a recess 13 provided on the upper surface of the main body 10b, and a groove 14 provided in the circumferential direction on the inner side surface of the recess 13. The leg portion 20b includes a rubber bottom 21, an adjustment portion 24, a second screw hole 25 provided in the adjustment portion 24, a screw hole 12 of the main body portion 10b and a screw 22b that is screwed into the second screw hole 25, and a main body. It has the support | pillar 23b which supports the main-body part 10b in the state combined with the part 10b.

  Unlike the manhole key hole embolus device 1 according to the first embodiment, the manhole key hole embolus device 1b according to the present embodiment includes a screw 22b and a column 23b which are formed of different members. A second screw hole 25 penetrating vertically is provided at the center of the adjustment portion 24, and the screw 22b is screwed into both the second screw hole 25 and the screw hole 12 of the main body portion 10b. The operator adjusts the height from the lower end of the leg portion 20b to the upper surface of the main body portion 10b by adjusting the depth of screwing with the screw hole 12 and the second screw hole 25. In addition, the method of removing the manhole key hole embolus device 1b from the key hole 41 is the same as that described in the first embodiment.

<Other embodiments>
Further, in the manhole cover 4 to be installed with the manhole key hole embolus device according to the present invention, when the distance D from the entrance of the key hole 41 of the manhole outer cover 40 to the upper surface of the inner cover 50 is always constant, The screw structure corresponding to the height adjusting means of the invention may be omitted.

It is a figure which shows the structure of the conventional embolization apparatus for manhole key holes. It is a figure showing composition of a manhole key embolus device concerning an embodiment. It is a figure which shows the structure of the operating device of the embolus apparatus for manhole key holes which concerns on embodiment. It is sectional drawing which shows the outline | summary of the manhole cover in embodiment, and the embolus device for manhole key holes inserted in the manhole cover. It is a figure which shows the outline | summary of the state by which the embolus device for manhole keyholes was inserted in the keyhole in embodiment. In embodiment, it is a top view which shows the method of removing the embolus device for manhole keyholes using an operating device. In embodiment, it is sectional drawing which shows the method of removing the embolization apparatus for manhole key holes using an operating device. It is a figure showing composition of a manhole key embolus device concerning an embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Manhole key hole embolization apparatus 10 Main-body part 11 Rubber packing 12 Screw hole 13 Recessed part 14 Groove part 20 Leg part 21 Bottom part 22 Screw 23 Support | pillar 24 Adjustment part 25 Second screw hole 30 Operating device

Claims (7)

An embolus device for a manhole keyhole that closes the keyhole of a manhole cover having an outer lid provided with a keyhole and an inner lid located under the outer lid,
A main body inserted into the keyhole and closing the keyhole;
A leg portion that contacts the inner lid in a state in which the main body portion is inserted into the keyhole, and that positions the main body portion in the keyhole;
An embolization device for a manhole keyhole comprising:   The embolus device for a manhole keyhole according to claim 1, further comprising a height adjusting means for adjusting a height from an end of the leg portion in contact with the inner lid to an upper surface of the main body portion. The height adjusting means adjusts the height from the end of the leg portion in contact with the inner lid to the upper surface of the main body portion according to the screwing depth of the screw structure of the main body portion and the leg portion that are screwed together. adjust,
The embolus device for a manhole keyhole according to claim 2.   4. The manhole key hole embolus device according to claim 1, wherein the leg portion further includes a contact end elastic member at an end in contact with the inner lid. 5.   5. The manhole keyhole embolization device according to claim 1, wherein the main body portion further includes a main body side surface elastic member biased to the inner surface on a side surface in contact with the inner surface of the keyhole. .   The said main-body part further has the to-be-latched means which the operation apparatus used when removing the said embolus device for manhole key holes from the said key hole latches. An embolization device for manhole keyholes. The locked means is a groove provided in the circumferential direction on an inner surface of a recess provided on the upper surface of the main body, and locked by the operating device.
The embolus device for manhole keyhole according to claim 6.

Images