JP2002242212A - Lid cover for split type manhole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lid cover for a split type manhole attachable to a lid body for the manhole provided with a lock function simply. SOLUTION: This lid cover for the split type manhole consists of the lid body 3 for the manhole having a cutout bar hole 7 for opening and closing formed at outer periphery and provided with the lock function 9 for preventing floating in the bar hole 7, a cover main body 20 made of a heat resistant material and covering the lid body 3 for the manhole, and a fitting body 30 provided with a pressing part 31 which is provided with a cutout fitting hole 21 having substantially same size as the bar hole 7 at a position of the bar hole 7 of the cover main body 20, is formed by heat resistant resin or metal, is fitted into the fitting hole 21, and is inserted into the bar hole 7 to press a fitting 8 for locking and unlock the lock function 9, a locking part 32 maintaining unlocking of the lock function 9 at a tip of the pressing part 31, and an enlarged collar part 33 attached to an upper face of the cover main body 20 at an upper end of the pressing part 31. Asphalt mixture does not adhere to a surface of the lid body 3 for the manhole.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a split type manhole cover that can prevent asphalt mixture from adhering to a manhole cover during a road pavement work, for example.

[0002]

2. Description of the Related Art Conventionally, manholes have been provided on roads for people to enter and exit for inspection and cleaning of pipes in sewage pipes, common trenches for electric power and communication, and connection and joining of sewage pipes. When paving a road with manholes, the asphalt mixture and concrete adhered to the pattern on the surface of the cast iron lid of the manhole, so it took considerable time to remove the asphalt mixture and concrete from the cast iron lid of the manhole. . Therefore, in order to prevent the asphalt mixture or concrete from adhering to the manhole cover, a manhole cover having a projection fitted into a fitting portion such as a hole or a notch formed in the manhole cover is particularly featured. It is proposed in Japanese Unexamined Patent Publication No. Hei 8-113957.

[0003]

However, in recent manhole covers, a locking function has been attached to the opening and closing burl hole in order to prevent rainwater from flowing in, prevent the cover from floating due to internal pressure, and prevent illegal dumping. For this reason, even if the projection provided on the conventional manhole cover is pushed into the burl hole, it is pushed back by the locking metal and the locking function cannot be unlocked satisfactorily, and the manhole cover is attached to the manhole cover. Could not be attached.

An object of the present invention is to provide a split type manhole cover which can be easily attached to a manhole cover having a lock function.

[0005]

The invention according to claim 1 has a plurality of pry holes formed on the outer periphery and a burl hole for opening and closing, and the burl hole has a lock function for preventing floating. A disc-shaped manhole cover, a disc-shaped cover body made of a heat-resistant material and covering the manhole cover, and a cover having a size substantially equal to the width of the burl hole at the position of the burl hole in the cover body. A fitting hole is provided, made of heat-resistant resin or metal, fitted into the fitting hole and inserted into the burl hole to press the lock metal of the lock function to unlock the lock function. A pressing portion, a locking portion for maintaining the unlocking of the lock function at the tip of the pressing portion,
A fitting body having an enlarged flange attached to the upper surface of the cover body is provided at an upper end of the pressing portion, and the fitting body is fitted into the fitting hole of the cover body.

According to a second aspect of the present invention, in the first aspect, the fitting body is provided in the fitting hole of the cover main body, and a projection is fitted in the prying hole.

According to a third aspect of the present invention, in the first or second aspect, the locking portion of the fitting body is provided at a center line of the burl hole so as to be locked to a lower surface of the manhole cover. Width (W) smaller than the length (H) in the horizontal direction
It is characterized in that it is formed in a larger dimension.

According to a fourth aspect of the present invention, in the first to third aspects, the fitting body is formed such that the fitting hole of the cover main body is formed in a notch shape and substantially I-shaped. A rectangular or hexagonal hole is provided on the upper surface of the flange portion for fitting a handle that rotates while pressing the fitting body.

According to a fifth aspect of the present invention, in the fourth aspect, a projection for reducing frictional resistance is provided on a tip end surface of an axis of the locking portion of the fitting body.

According to a sixth aspect of the present invention, in the first or second aspect, the fitting hole of the cover main body is formed in a substantially elliptical shape having no groove on the outer peripheral side, and the fitting body is inverted. It is characterized in that it is formed in a J-shape and fitted into the fitting hole.

According to a seventh aspect of the present invention, in the first or second aspect, a magnet sheet is attached to a lower surface of the cover body.

[0012]

According to the first or second aspect of the present invention, there is provided a cover body for covering a manhole cover having a locking function for preventing floating in a burl hole, and a burr hole at a position of the burl hole in the cover body. A lock hole of approximately the same size as the width is provided, made of heat-resistant resin or metal, inserted into the lock hole and inserted into the burl hole to press the lock metal of the lock function to release the lock function. The cover includes a pressing part to be locked, a locking part at the tip of the pressing part to maintain the unlocking of the lock function, and a fitting body having an enlarged flange attached to the upper surface of the cover body at the upper end of the pressing part. By fitting the fitting into the fitting hole of the main body, the locking function of the manhole cover is unlocked, and the cover body can be securely attached to the manhole cover by the locking portion of the fitting. Further, by forming the fitting body into a split type, the manufacture of the cover body becomes easy. In particular, by providing the protruding portion to be fitted into the twist hole according to the second aspect, it is possible to more reliably prevent the cover body from slipping and falling. This can prevent the asphalt mixture or concrete from adhering to the manhole cover during pavement work on the road.

According to a third aspect of the present invention, the length (H) of the burl hole in the direction of the center line and the width (W) in the lateral direction of the burl hole are set so that the locking portion of the fitting body is locked to the lower surface (back surface) of the manhole cover. )
Since it is formed with a larger size, it can be locked to the lower surface of the burl hole, and can be unlocked reliably, so that the effects of claim 1 and claim 2 can be achieved.

In the fourth and fifth aspects, the fitting body is formed in a substantially I-shape, and a square or hexagonal hole into which the handle which rotates while pressing the fitting body is fitted on the upper surface of the flange portion. Since it is provided, the rotation of the fitting body is facilitated, and the cover main body can be securely attached to the manhole cover. In addition, since the protrusion is provided on the distal end surface of the axis of the locking portion, the frictional resistance is reduced, and the rotation of the fitting body is facilitated.

In the sixth aspect, the fitting hole of the cover main body is formed in a substantially elliptical shape without a groove on the outer peripheral side, and the fitting body is formed in an inverted J-shape. After the fitting body is inserted into the hole, the fitting body is pulled in the center direction (inward direction), so that the locking portion is locked on the lower surface (back surface) of the manhole cover, and the cover body can be easily attached. .

In the present invention, the cover body can be firmly adhered to the manhole cover by sticking the magnet sheet to the lower surface of the cover body, and the cover body can be prevented from being rolled up. . In particular, claim 1
This is useful for a cover body without a projection.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A manhole cover according to the present invention will be described with reference to an embodiment in which the cover is applied to a dirt preventive cover of a cast iron cover for a manhole.

[First Embodiment] FIGS. 1 to 5 show a first embodiment of the present invention. FIG. 1 is a diagram in which a split type manhole cover is attached to a manhole cover. .

The cover cover 1 for manhole is a dirt prevention cover for the cover of manhole cast iron, which covers the entire surface of the cast iron cover 3 held in the cast iron frame of the manhole of sewerage during the work of paving the road R. is there. The frame 2 is provided with a fitting hole 4 for fitting the cast iron lid 3 and an engaging portion 5 on the upper surface. Reference numeral 6 denotes a hinge for connecting the cast iron lid 3 and the frame 2. Reference numeral 8 denotes a lock fitting held in a notched opening / closing burl hole 7 for opening and closing the cast iron lid 3. Locking bracket 8
Is connected to a lock function 9 using a weight or a spring lock (not shown), and when the internal pressure in the manhole rises, the hook portion of the lock function 9 engages with the engagement portion 5 of the frame 2, and a cast iron lid more than necessary 3 is intended to prevent floating.

The cast iron cover 3 is, as shown in FIGS.
A manhole cover according to the present invention, which is formed in a substantially disk shape and has various antislip patterns formed on a surface thereof. A rib 10 for maintaining rigidity is formed on the back surface of the manhole cover 3. Further, on the outer periphery of the manhole cover 3, a plurality of notched pry holes 11 and opening and closing burl holes 7 are formed. The opening and closing burl hole 7 has a lock fitting 8 for a lock function 9.
The manhole cover 1 is attached to the manhole cover 3 so that the lock function 9 of the burl hole 7 is unlocked.

The manhole cover 1 is shown in FIGS.
As shown in the figure, a cover body 20 made of a heat-resistant and abrasion-resistant rubber, resin, or the like, and a notch having a size substantially equal to the width of the burl hole 7 at a position of the burl hole 7 of the cover body 20. Are provided. A fitting body 30 that fits into the burl hole 7 and the fitting hole 21 is formed.

The fitting body 30 is formed of a heat-resistant resin or metal, is fitted in the fitting hole 21 and has the burl hole 7.
A rod-shaped pressing portion 31 which is inserted into the inside and presses the locking metal member 8 of the locking function 9 to unlock the locking function 9, and a locking portion at the tip of the pressing portion 31 for maintaining the unlocking of the locking function 9. 3
2 and an enlarged I-shaped portion having an enlarged flange portion 33 (a shape including a circular shape, a rectangular shape, or an umbrella shape) attached to the upper surface of the cover body 20 above the pressing portion 31. The separate fitting body 30 is fitted into the cover body 20 and the fitting hole 21.

A rectangular or hexagonal hole 34 is provided on the upper surface of the flange 33 of the fitting body 30 so that a handle that rotates while pressing the fitting body 30 is fitted. The handle hole 34
May be one, but two are preferably arranged side by side to facilitate rotation. In this case, a round hole may be used.

Further, the manhole cover 3 is provided with a projection 23 to be fitted in the prying hole 11 as required, so that the adhesion of the cover body 20 to the manhole cover 3 can be improved.

[Second Embodiment] FIGS. 6 and 7 show a second embodiment of the present invention, in which a locking metal fitting is provided on the tip end surface of the axis of a locking portion 32 of a fitting body 30 attached to a cover body 20. A protrusion 35 is provided to reduce the frictional resistance during pressing and rotation with the shaft 8.

As shown in FIG. 8, the length (A) of the locking portion 32 of the fitting body 30 is such that the center line of the burl hole 7 is locked to the lower surface (back surface) of the manhole cover 3. The length is smaller than the length (H) in the direction and larger than the width (W) in the horizontal direction. Further, the locking portion 32 is formed in a direction of 90 ° with respect to the center line direction, but it is sufficient if there are some portions to be locked on the lower surface. The angle may be in the range of 90 °.

[Attaching Method of Cover] Next, a method of attaching the manhole cover 1 of the present invention to the manhole cover 3 will be described with reference to FIGS.
As shown in FIG. 8, the fitting hole 21 of the cover main body 20 is fitted in the burl hole 7 of the manhole cover 3. Next, the fitting body 30 is inserted in the center line direction in the burl hole 7 of the manhole cover 3.
And is pressed in from above as shown in FIG. 9. Then, a handle (planting wrench) is fitted into the hole 34 of the flange 33 of the fitting body 30, and the fitting body 30 is rotated 90 ° clockwise. Thereby, the locking portion 32 of the fitting body 30 is locked to the lower surface of the manhole cover 3, and the cover body 20 can be mounted on the manhole cover 3.

When the projection 23 is provided on the cover body 20, the projection 23 is fitted into the prying hole 11 of the manhole cover 3. Thereby, the cover body 20 can be further firmly attached.

Further, when the paving work is completed and the manhole cover 1 is to be removed, the procedure of the above mounting method may be reversed.

Third Embodiment FIGS. 11 to 13 show a fitting body 40 according to a third embodiment of the present invention. This fitting 4
Numeral 0 is made of heat-resistant resin or metal as in the first embodiment, has an inverted J-shape, and has a pressing portion 41 and a substantially L-shaped locking portion 42 and a flange portion 43 provided at the tip. . And
As shown in FIG. 12, the burr hole 7 of the manhole cover 3 is formed.
As shown in FIG. 13, by inserting the locking portion 42 of the fitting body 40 to press the metal fitting 8 for locking and moving the fitting body 40 in the center direction (inward), as shown in FIG. The locking portion 42 is locked to the lower surface of the. For this reason,
Since the rotation of the fitting body 40 is not required, the attachment of the cover main body 20 becomes easy. Further, in order to firmly attach the cover body 20 to the manhole cover 3, a projection 23 that fits into the prying hole 11 may be provided as necessary.

FIG. 14 shows a cover body 50 according to a fourth embodiment of the present invention. This cover body 5
0 is provided with a fitting body 30 or a fitting body 40,
Magnet sheets 57, 57 are attached to the lower surface (back surface) in the vicinity of zero prying hole 11. This allows
The cover body 50 can be firmly attached to the manhole cover 3, and the cover body 50 can be prevented from being rolled up. In particular, it is useful to provide the projection 23 instead of the projection 23 that fits into the prying hole 11.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is a plan view of a manhole cover.

FIG. 3 is a sectional view of a main part showing a locking function in a burl hole of a manhole cover.

FIG. 4 is a plan view showing a manhole cover according to the present invention.

FIG. 5 is a cross-sectional view showing a state where a fitting body is fitted to the manhole cover of the present invention.

FIG. 6 is a cross-sectional view taken along a line aa of FIG. 4 showing a fitting body according to a second embodiment of the present invention.

FIG. 7 is a cross-sectional view taken along line bb of FIG. 4 showing a fitting body according to a second embodiment of the present invention.

FIG. 8 is a cross-sectional view of a main part showing an attached state of the cover body of the present invention.

9 is a cross-sectional view of a principal part taken along the line cc in FIG. 8 when the fitting body of the cover body of the present invention is pressed.

FIG. 10 is a cross-sectional view of a main part when the engaging portion is rotated to lock the locking portion.

FIG. 11 is a sectional view of a main part showing a third embodiment of the present invention.

FIG. 12 is a sectional view of a main part when a fitting body according to a third embodiment of the present invention is pressed.

FIG. 13 is a sectional view of a main part when a fitting body according to a third embodiment of the present invention is locked.

FIG. 14 is a rear view of a cover main body showing a fourth embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 manhole cover 3 manhole cover (cast iron cover) 7 opening and closing bur hole 8 locking metal fitting 9 lock function 11 twisting hole 20, 50 cover body 21 fitting hole 23 protrusion 30, 40 fitting body 31, 41 pressing Part 32, 42 Locking part 33, 43 Flange part 34 Hole 35 Projection 57 Magnet sheet

Claims (7)

[Claims] 1. A disc-shaped manhole cover having a plurality of prying holes formed on the outer periphery and a burl hole for opening and closing, and having a locking function for preventing floating in the burl hole, and a heat-resistant material. A disc-shaped cover body that covers the manhole cover, and a fitting hole having a size substantially equal to the width of the burl hole is provided at a position of the burl hole of the cover body, and a heat-resistant resin or metal is used. A pressing portion formed and fitted into the fitting hole and inserted into the burl hole to press the locking metal of the locking function to unlock the locking function; A locking portion for maintaining the unlocking of the, and a fitting body having an enlarged flange portion attached to the upper surface of the cover body at the upper end of the pressing portion,
A cover for a split type manhole, wherein the fitting body is fitted into the fitting hole of the cover body. 2. The split type manhole cover according to claim 1, wherein the fitting body is provided in the fitting hole of the cover main body, and a projection portion fitted in the prying hole is provided. Split type manhole cover. 3. The cover for a split type manhole according to claim 1, wherein the locking portion of the fitting body is formed in the burl hole such that the locking portion is locked to a lower surface of the manhole cover. A cover for a split-type manhole, which is formed to have a size smaller than a length (H) in a center line direction and larger than a width (W) in a lateral direction. 4. The split type manhole cover according to claim 1, wherein the fitting body has a notch shape in the fitting hole of the cover body, and has a substantially I-shape. A lid for a split-type manhole, wherein a rectangular or hexagonal hole is formed on the upper surface of the flange portion for fitting a handle that rotates while pressing the fitting body. 5. The split type manhole cover according to claim 4, wherein a projection for reducing frictional resistance is provided on a tip end surface of an axis of the engagement portion of the fitting body. Manhole cover. 6. The cover for a split type manhole according to claim 1, wherein the fitting hole of the cover main body is formed in a substantially elliptical shape having no groove on an outer peripheral side, and the fitting body is formed. Is formed in an inverted J-shape and fitted in the fitting hole. 7. The split type manhole cover according to claim 1, wherein a magnet sheet is adhered to a lower surface of the cover body. .