JPH101963A - Manhole protective block - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide protective block, which can be installed by simple operation only for insertion into a projected manhole frame body and exchanged simply with an adapted shape in response to the progressive state of construction works and by which the period of the execution of works is shortend and construction cost can be reduced. SOLUTION: This protective block is inserted at an approximately central section to a manhole frame body 1, a top face has an inclined plane in a downward grade towards the outside, and the protective block is formed in thickness formed in the same height as projecting height from a ground surface of the manhole frame body 1. Accordingly, the protective block can be mounted by simple operation, is safe even to a walker and a car because the periphery of the manhole frame body 1 is shaped in the inclined plane after installation, and can be removed simply at the time of regular asphalt pavement.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for repairing and repairing a road or the like by inserting and installing a manhole protection block having an outer downward slope on the outer periphery of a manhole frame projecting from an excavated ground. The present invention relates to a manhole protection block for protecting a manhole frame and improving traffic safety.

[0002]

2. Description of the Related Art At the time of new or renovated road construction, before asphalt pavement, a manhole frame at least as high as the thickness of the asphalt pavement protrudes from the ground.

[0003] The manhole frame projecting from the ground excavated in this way has a danger of stumbling when walking or rubbing the body of a vehicle such as a passenger car, etc., and hinders traffic. .

For this reason, conventionally, a room temperature mixture (asphalt) was raised around the protruding manhole frame to form an inclined surface.

[0005]

However, the work of forming an inclined surface by such asphalt swelling is as follows.
It takes much time and the asphalt has a different strength from the asphalt for pavement, so it is necessary to remove it with heavy equipment (shovel car) when paving the road, and such removal work lengthens the construction period and increases construction costs. And so on.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and can be installed by a simple operation of simply inserting the manhole frame projecting from the ground, and according to the progress of construction. An object of the present invention is to provide a manhole protection block that can be easily replaced with an adapted shape, shorten a construction period, and reduce construction costs.

[0007]

SUMMARY OF THE INVENTION A manhole protection block according to the present invention is a plate-shaped manhole protection block which is inserted into a manhole frame and has an upper surface formed on a slope inclined downward toward the outside. The protection block has the same thickness as the height of the manhole frame body, is divided into a plurality in the thickness direction, and the divided portions are configured to be mutually overlapped and regulated by the position regulating means. I have. Due to this feature, the manhole frame is inserted into the manhole frame at a substantially central portion, and the upper surface has a slope inclined downward toward the outside, and the divided portion divided into a plurality of portions in the thickness direction is regulated and joined by the position regulating means. Therefore, it can be installed by simple work, and after it is installed, the perimeter of the manhole frame is formed with an inclined surface, so it is safe for pedestrians and vehicles, and in the case of regular asphalt pavement It can be easily removed.

Further, since the manhole protection block is divided into a plurality of sections in the thickness direction, it can be selected to have a thickness adapted to a change in the height of the manhole frame projecting from the ground according to the progress of construction. The efficiency of installation work can be improved.

[0009] The manhole protection block of the present invention has a plurality of horizontal divisions in which the manhole protection block is divided in a direction crossing the center, and the horizontal divisions are connected to each other by being restricted by the position restriction means. Is preferred. By doing so, the weight is reduced and the installation work is facilitated,
At the time of joining, since the divided portions are regulated by the position regulating means, stable joining can be easily performed.

In the manhole protection block according to the present invention, the upper block has a smaller horizontal division than the lower block, and the divided upper block is placed on the horizontal division of the lower block. Is preferred. By doing so, the divided portion of the lower divided block is suppressed by the upper divided block, so that the divided portion of the lower divided block can be reinforced.

In the manhole protection block of the present invention, a portion to be inserted into the manhole frame has a hole formed in the manhole protection block with a diameter larger than the outer periphery of the manhole frame.
It is preferable that an annular elastic body is inserted into a gap formed between the large-diameter hole and the outer periphery of the manhole frame. By doing so, since the portion to be inserted into the manhole frame is formed of an annular elastic body, it is affected by the concentricity of the manhole protection block hole with respect to the outer periphery of the manhole frame and also the shape of the ground to be installed. The inclination error can be absorbed, and the installation work can be simplified.

It is preferable that the manhole protection block of the present invention is constituted by concave and convex portions in which the position regulating means can be fitted to each other. By doing so, the alignment of each divided block becomes easy, and the assembling work can be simplified.

The manhole protection block of the present invention preferably has an outer shape of a circle or a rectangle, respectively. By doing so, the outer shape is formed in accordance with the outer shape of the manhole frame formed in a circular or rectangular shape, so that it can be formed on substantially the same inclined surface from any direction and can pass safely.

In the manhole protection block of the present invention, the annular elastic body has a plurality of concave grooves formed on a bottom surface and an inner peripheral surface thereof so as to be able to be inserted into a plurality of fins formed on the outer periphery of the manhole frame. preferable. By doing this,
Since the plurality of concave grooves are inserted into the corresponding fins, the annular elastic body can be positioned and prevented from rotating.

The manhole protection block of the present invention is preferably constructed such that the manhole protection block is made of thin cast iron and has a predetermined reinforcing rib inside. By doing so, the predetermined reinforcing ribs are provided inside, so that it is possible to have rigidity and reduce the weight.

In the manhole protection block of the present invention, it is preferable that the manhole protection block has a plurality of elastic members protruding at predetermined positions on the bottom surface of the lowermost divided block. By doing so, a plurality of elastic bodies are protruded at predetermined positions on the bottom surface of the lowermost divided block, so that even if irregularities are formed on the ground where the manhole protection block is installed, these are absorbed and stable. Can be held.

In the manhole protection block according to the present invention, it is preferable that the manhole protection block has a reflector attached to the upper surface of each divided block. By doing so, since the reflector is stuck on the upper surface of each divided block, light is reflected at night, so that it is safe for vehicle operation and also for pedestrians.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments and the drawings.

First, an embodiment of a manhole protection block according to the present invention will be described with reference to FIGS.

FIG. 1 is a sectional view showing a state in which a manhole protection block is installed on the ground, and FIG. 2 is an overall perspective view of the manhole protection block.

Reference numeral 1 denotes a commonly used manhole frame, and the manhole frame 1 can be classified into two types, that is, a normal annular shape and a rectangular shape.

The manhole protection block 2 of the present embodiment
Is formed so as to be fitted and fitted to the outer periphery of the ring-shaped manhole frame 1, and is fitted into the manhole frame 1 at a substantially central portion, and the upper surface is inclined downward toward the outside. It is formed in a disk shape having a slope.

The manhole protection block 2 is formed so as to have a total thickness at least equal to the height H of the manhole frame 1, and is divided into a plurality (two upper and lower blocks in this embodiment) in the thickness (H) direction. Is done.

The divided upper block 3 and lower block 4 are configured so as to be positioned and regulated by a later-described position regulating means at each of the divided portions BT and to be overlapped and connected to each other.

The upper block 3 and the lower block 4
When they are overlapped with each other, a hole 5 slightly larger than the outer periphery of the manhole frame 1 is formed at the center.

An annular groove 6 is formed at the upper edge of the hole 5 of the lower block 4, and when the rubber-like lower annular elastic body 7 is inserted into the hole 5, the upper part of the lower annular elastic body 7 is formed. A jaw 8 formed on the outer peripheral edge is engaged with the annular groove 6.

Similarly, an annular groove 9 is formed in the upper block 3 at the upper edge of a hole 5 formed in the same shape as the lower block 4, and a rubber-like upper annular elastic body 10 is inserted therein. At this time, the jaw portion 11 formed on the upper outer peripheral edge of the upper annular elastic body 10 is engaged with the annular groove 9.

Also, as shown in FIG.
In the lower part of the outer periphery of the manhole frame 1, there are formed longitudinal grooves 13 which can be engaged with the fins 12 arranged at a predetermined interval. Fins 1 arranged at predetermined intervals at the lower part of the outer periphery of
2 is formed with a longitudinal groove 14 which can be engaged.

Further, as shown in FIG. 2, the manhole protection block 2 is divided into a plurality in the direction (radial direction) crossing the hole at the center (in this embodiment, the upper block is divided into three and the lower block is divided into eight). ), Which are configured so that the horizontal divided portions BR are connected to each other while being restricted by position restricting means described later.

FIG. 4 is a perspective view of the upper divided block 3a. In the horizontal divided portion BR of the upper divided block 3a, a concave / convex portion 15 serving as a position restricting means is formed. It is configured to be.

FIG. 5 is a perspective view of the lower divided block 4a. In the horizontal divided portion BR of the lower divided block 4a, a concavo-convex portion 16 serving as a position restricting means is formed. It is configured to be.

A flat portion 17 on which the upper block 3 is placed is formed on the upper portion of the lower block 4, and the flat portion 17 is positioned at the center by a position regulating means so as to engage with each divided block. A certain convex portion 18 is formed in the radial direction.

On the other hand, the bottom of the upper block 3 has a projection 18
The lower block 4 is formed with a concave portion (not shown) that can be engaged with the lower block 4 so as to be positioned.

Next, FIG. 6 is a perspective view of the lower divided block 4a as viewed from the bottom surface. As can be seen from the figure, the other divided blocks are also formed of thin cast iron.
Reinforcing ribs 19 are formed on the bottom surface of the lower divided block 4a to increase rigidity and reduce weight.

Further, as shown in FIG. 6, a plurality of elastic members 20 are protruded outside the bottom surface of the lower divided block 4a.

Thus, when the lower divided block 4a is connected and integrated and installed on the ground around the outer periphery of the manhole frame, it is possible to absorb the unevenness of the ground.

A reflecting plate 21 is attached to the inclined surface of each divided block. For this reason, light is reflected at night, so that the position of the manhole protection block protruding from the ground can be confirmed during vehicle operation and for pedestrians.

As shown in FIGS. 1, 2 and 5, a peg hole 2 is formed below the inclined surface of each lower divided block 4a.
4 are formed, and the peg 22 can be driven into the ground through the peg hole 24 and fixed.

Further, as shown in FIGS. 1, 2 and 4, a bolt hole 25 is formed in the lower part of the inclined surface of each upper divided block 3a, and the upper part is formed by a bolt 23 inserted into the bolt hole 25. The divided block 3a can be attached to the lower divided block 4a.

Next, the procedure for installing the manhole protection block configured as described above will be described.

First, as shown in FIG. 8A, when the ground is excavated by road construction or the like, the entire height H of the manhole frame 1 projects from the ground GL.

Therefore, the manhole protection block 2 of the present invention is installed around the manhole frame 1 in order to ensure safety on the road operation.

First, the lower divided blocks 4a shown in FIG. 5 are arranged on a concentric circle centered on the manhole frame 1, and the horizontal divided portion BR of each lower divided block 4a
6 and is formed into a disk shape having a maximum thickness h1.

Next, the lower block 4 formed in a disk shape
A rubber-like lower annular elastic body 7 is inserted into an annular gap formed by the center hole 5 and the outer periphery of the manhole frame body 1, and the vertical groove 13 of the lower annular elastic body 7 is fitted to the fin 12 of the manhole frame body 1. Engage. At the same time, the jaw portion 8 of the lower annular elastic body 7 is engaged with the annular groove 6 formed on the upper edge of the hole 5.

As described above, the upper and lower annular elastic bodies 11, 7
Is configured to be engaged with the fins 12 of the manhole frame 1, each annular elastic body is positioned and can be prevented from rotating.

Subsequently, the upper divided blocks 3a shown in FIG.
Are aligned, and the protrusions 18 on the upper surface of the lower block 4 are engaged with the concave portions (not shown) of the upper divided blocks 3a for positioning. Next, the horizontal divided portions BR of the respective upper divided blocks 3a are engaged with each other via the concave / convex portions 15 to form a disk having a maximum thickness h2.

As described above, each of the lower divided blocks 4a and each of the upper divided blocks 3a are joined by the concave / convex portion BR, and the lower divided block 4a and the upper divided block 3a are also joined to each other by the concave / convex portion. Positioning of the divided blocks is facilitated, and assembly work can be simplified.

A rubber-like upper annular elastic body 10 is inserted into an annular gap formed between the outer periphery of the manhole frame 1 and the center hole 5 of the upper block 3 formed in a disk shape. 10 fins 14 of the manhole frame 1
To be engaged. At the same time, the jaw portion 11 of the upper annular elastic body 10 is engaged with the annular groove 6 formed on the upper edge of the hole 5.

In this case, while the upper block 3 is divided into three parts, the lower block 4 is divided into eight parts. As shown in FIG. 2, a single upper divided block 3a is composed of a plurality of joined lower parts. Since it is mounted on the divided block 4a, each horizontal divided portion BR of the lower divided block 4a is suppressed from the upper part and is stabilized.

Finally, the upper block 3 is fixed to the lower block 4 by bolts 23, and then the lower block 4
Are fixed to the ground by pegs 22.

In this manner, the height (h1 + h) corresponding to the height H of the manhole frame 1 is provided on the outer periphery of the manhole frame 1.
2 = H) is provided.

Here, since the lower annular elastic body 7 and the upper annular elastic body 10 are interposed in the gap formed between the manhole protection block 2 and the outer periphery of the manhole frame 1, the gap is formed on the ground. Even when a dimensional error occurs due to unevenness or an inclined state, it can be absorbed by being elastically deformed.

Next, the state shown in FIG. 8 (c) shows a state in which coarse and dense grain asphalt is laid to a thickness of h1 at a place where the road work has been excavated and excavated. In this case, the thickness h2 is shown. Only the upper block 3 is installed on the asphalt laid on the outer periphery of the manhole frame 1.

The procedure for installing the upper block 3 is performed in the same procedure as the procedure for the upper block 3 described above, and a description thereof will be omitted.

In this case, in order to fix the upper block 3 on asphalt, pegs 22 are used instead of the bolts 23 for connection to the lower block 4.

Finally, as shown in FIG. 8D, when asphalt having a thickness corresponding to the thickness h2 of the upper block 3 is laid, the surface of the asphalt becomes the manhole frame 1.
It is laid on the same plane as the upper surface of the road, and road construction is completed.

Next, FIG. 7 shows another embodiment, and a rectangular manhole protection block used in correspondence with a rectangular manhole frame will be described.

Since the manhole protection block 26 is configured in the same manner as the above-described manhole protection block, common portions are denoted by the same reference numerals, and detailed description is omitted.

The manhole protection block 26 of the present embodiment
Consists of a plurality of divided blocks engaged by each horizontal divided portion BR, and includes a lower block 27 and an upper block 28.
A rubber-like rectangular elastic body 30 is inserted into a gap between a rectangular hole (not shown) formed in the center of each of the upper and lower blocks 28 and 27 and the manhole frame 29. You.

This rectangular elastic body 30 is
Vertical grooves which are formed of upper and lower rectangular elastic bodies corresponding to the holes 8 and 27, and which can be engaged with fins (not shown) disposed on the lower part of the outer periphery of the manhole frame 29 in the same manner as the aforementioned annular elastic body. The upper and lower rectangular elastic members are provided with jaws at the upper outer peripheral edge.

When the rectangular elastic body 30 is inserted into the gap formed between the holes of the upper and lower blocks 28 and 27 and the outer periphery of the manhole frame 29, the rectangular elastic body 30 is formed at the upper edge of the hole. The jaws of the upper and lower rectangular elastic members 30 are engaged with the grooves.

The manhole protection block 26 thus configured is installed in the same procedure as that described in the embodiment of the manhole protection block 2 described above.

Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and even if there are changes and additions within the scope not departing from the gist of the present invention. Included in the invention.

For example, the material constituting the manhole protection block is not limited to cast iron, but may be hard rubber or fiber reinforced plastic, and is not limited to the material and the external shape.

Further, the configuration has been described in which the concave and convex portions constituting the divided portions are arranged side by side in a horizontal direction across the center portion. However, they may be arranged corresponding to the thickness direction of each divided portion. Various things can be considered without being limited to.

[0066]

The present invention has the following effects.

(A) According to the first aspect of the present invention, the manhole frame is inserted into the manhole frame at a substantially central portion, the upper surface has a slope inclined downward toward the outside, and is divided into a plurality of parts in the thickness direction. Because the parts are joined by being regulated by the position regulating means, it can be installed by simple work, and after being installed, the periphery of the manhole frame is formed with an inclined surface, so it is safe for pedestrians and vehicles. Yes, and can be easily removed on regular asphalt pavements. Furthermore, since the manhole protection block is divided into a plurality of parts in the thickness direction, it can be selected according to the progress of the construction so that the thickness of the manhole frame that protrudes from the ground can be selected according to the change in height. Efficiency can be improved.

(B) According to the second aspect of the present invention, the weight is reduced and the installation work is facilitated, and at the time of joining, since the divided portions are regulated by the position regulating means, stable joining can be easily achieved.

(C) According to the third aspect of the present invention, since the divided portion of the lower divided block is suppressed by the upper divided block, the divided portion of the lower divided block can be reinforced.

(D) According to the fourth aspect of the present invention, since the portion to be inserted into the manhole frame is formed of a ring-shaped elastic body, the concentricity of the manhole protection block hole with respect to the outer periphery of the manhole frame and also the installation. The inclination error affected by the shape of the ground to be formed can be absorbed, and the installation work can be simplified.

(E) According to the fifth aspect of the present invention, the positioning of each divided block is facilitated and the assembling work can be simplified.

(F) According to the sixth aspect of the present invention, since the outer shape is formed in accordance with the outer shape of the manhole frame formed in a circular or rectangular shape, it is formed on substantially the same inclined surface from any direction and can be safely formed. You can pass.

(G) According to the seventh aspect of the present invention, since the plurality of concave grooves are inserted into the corresponding fins, the annular elastic body can be positioned and stopped.

(H) According to the eighth aspect of the present invention, since the predetermined reinforcing ribs are provided inside, the rigidity and the weight can be reduced.

(I) According to the ninth aspect of the present invention, since a plurality of elastic bodies are protruded at predetermined positions on the bottom surface of the lowermost divided block, irregularities are formed on the ground on which the manhole protection block is installed. However, these can be absorbed and maintained in a stable state.

(J) According to the tenth aspect of the present invention, since the reflecting plate is attached to the upper surface of each divided block, light is reflected at night, so that it is safe for vehicle operation and for pedestrians. is there.

[0077]

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a manhole protection block of the present invention and showing a state where the manhole protection block is installed on the ground around the outer periphery of a manhole frame.

FIG. 2 is an overall perspective view of a manhole protection block according to the present invention.

FIG. 3 is an exploded view showing a state where the annular elastic body of the manhole protection block is assembled.

FIG. 4 is a perspective view showing a single unit of an upper divided block.

FIG. 5 is a perspective view showing a single unit of a lower divided block.

FIG. 6 is a perspective view of a single lower divided block as viewed from the bottom.

FIG. 7 is an overall perspective view of a rectangular manhole protection block showing another embodiment of the manhole protection block of the present invention.

FIGS. 8A to 8D are process diagrams showing a procedure for installing the manhole protection block of the present invention on the ground around the outer periphery of the manhole frame.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Manhole frame 2 Manhole protection block 3 Upper block 3a Upper divided block 4 Lower block 4a Lower divided block 5 Hole 6 Annular groove 7 Lower annular elastic body 8 Jaws 9 Annular groove 10 Upper annular elastic body 11 Jaws 12 Fins 13, 14 Vertical groove 15, 16 Uneven part (position regulating means) 17 Flat part 18 Convex part 19 Reinforcement rib 20 Elastic body 21 Reflector 22 Peg 23 Bolt 24 Peg hole 25 Bolt hole 26 Manhole protection block 27 Lower block 28 Upper block 29 Manhole Frame 30 Rectangular elastic body BR Horizontal division GL Ground

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Kazuki Hidaka 7-16 Nagasakadai, Kanazawa City, Ishikawa Prefecture

Claims (10)

[Claims] 1. A plate-shaped manhole protection block which is inserted into a manhole frame and has an upper surface formed on a slope inclined downward toward the outside, the manhole protection block having the same thickness as the height of the manhole frame. A manhole protection block, wherein the block is divided into a plurality of parts in the thickness direction so that the divided parts are connected to each other by being regulated by position regulating means. 2. The manhole protection block has a plurality of horizontal divisions divided in a direction crossing the central portion, and the horizontal divisions are connected to each other by being restricted by position restriction means. The manhole protection block according to claim 1, wherein: 3. The horizontal dividing section is configured such that the horizontal dividing section of the upper block is smaller than the horizontal dividing section of the lower block, and the divided upper block is placed on the horizontal dividing section of the lower block. The manhole protection block according to claim 1 or 2, wherein: 4. A portion to be inserted into the manhole frame is formed with a hole having a diameter larger than the outer periphery of the manhole frame in the manhole protection block, and formed between the large diameter hole and the outer periphery of the manhole frame. The manhole protection block according to claim 1, wherein an annular elastic body is inserted into the gap to be formed. 5. The position control means according to claim 1, wherein the position control means comprises an uneven portion which can be fitted to each other.
The manhole protection block as described in. 6. The manhole protection block according to claim 1, wherein the manhole protection block has a circular or rectangular outer shape. 7. The annular elastic body has a plurality of concave grooves formed on a bottom surface and an inner peripheral surface thereof so as to be insertable into a plurality of fins formed on an outer periphery of the manhole frame. The manhole protection block as described in. 8. The manhole protection block according to claim 1, wherein the manhole protection block is formed of thin cast iron and is provided with a predetermined reinforcing rib inside. 9. The manhole protection block according to claim 1, wherein the manhole protection block is formed by projecting a plurality of elastic bodies at predetermined positions on the bottom surface of the lowermost divided block. 10. The manhole protection block according to claim 1, wherein the manhole protection block has a reflector attached to an upper surface of each divided block.