JP3187362B2 - Manhole protection frame - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

The present invention relates to a manhole protection frame, and more particularly to a manhole protection frame that is easy to lay.

[0002]

2. Description of the Related Art At the time of new or renovated road construction, before asphalt pavement, a manhole frame corresponding to the thickness of asphalt to be paved is in a state of protruding from the ground.

[0003] The manhole frame projecting from the ground in this way hinders the passage of pedestrians or vehicles, and it is difficult to confirm the passage particularly at night, so that the body may be damaged by contacting the bottom of the vehicle. There is a risk that a pedestrian may trip over and fall. For this reason, conventionally, asphalt was raised to the height of the manhole around the manhole frame, and an inclined surface was formed around the asphalt.

[0004] However, such asphalt assembling work takes time, and this asphalt is
Since the strength is different from that of asphalt for pavement, it is necessary to remove the asphalt with a heavy machine or the like when paving the road, and such a work of removing asphalt has caused a prolonged construction period and increased construction costs.

Therefore, the applicants have conducted intensive research and found that instead of the conventional asphalt slab, a portion corresponding to the inclined portion formed by the slab is formed into a block shape which can be transported and divided. Focusing on the point that it can be shortened, at least during the road construction period, a protective block with a removable slope that was temporarily installed around the manhole frame projecting from the ground and was developed was developed.

[0006]

The protection block of this type has a top surface formed with a downwardly inclined surface facing outward.
It is made of cast iron to withstand the weight of the vehicle, and its outer size increases in proportion to the height of the manhole frame, which increases its weight. Configuration.

Further, in order to reduce the weight in consideration of the transportability, it is conceivable to select a material having a low specific gravity. However, if the weight is reduced, the "sitting" with respect to the ground becomes unstable, so that the vehicle passes. It is easy to move due to vibration or the like at the time, and has a problem that it is damaged by vibration or impact because the strength is weak.

Therefore, the applicants have further studied, and in order to reduce the weight in consideration of the above problems, a large number of penetration spaces penetrating in the thickness direction are formed, and a lattice-shaped penetration space is provided. Filled with sand and crushed stone, etc. to ensure the required weight at the time of installation and also ensure the safety of vehicle traffic
The present invention has been completed by paying attention to the point that is performed.

The present invention has been made in view of such problems, and is easy to transport and stable at the time of installation, improving laying workability , and further improving the safety of vehicle traffic.
An object is to provide a manhole protection frame that can be secured .

[0010]

In order to achieve the above object, a manhole protection frame according to the present invention has a plate-like shape which is inserted into a manhole frame and has an upper surface formed on a slope inclined downward toward the outside. A manhole protection frame, wherein the manhole protection frame has a thickness substantially equal to the height of the manhole frame, a plurality of through-holes are formed in the thickness direction, and a circumferential direction having a substantially lattice-like appearance. Ri formed from a combination of multiple divided divided blocks, divided blocks divided in the circumferential direction
Having an auxiliary frame that can be inserted around the outer periphery of the inner frame,
The body is composed of an endless frame whose upper surface is inclined downward toward the outside.
Made is to have characterized the formation Rukoto. According to this feature, a plurality of through-holes are formed in the thickness direction, formed so as to have a substantially lattice shape in appearance, and a plurality of divided blocks divided in the circumferential direction are installed in combination. Even if the body increases in size in proportion to the height of the manhole frame, the weight is reduced, the transportation is easy, the laying work is simplified, and the multiple grids that penetrate even after installation can be filled with crushed stone or the like, thereby not only stability is obtained can have you been predetermined weight is secured during the passage of such a vehicle, inside which is divided in the circumferential direction
If only divided blocks are used, form
The step with the ground to be formed is inclined by the endless auxiliary frame.
Is formed, so that when the vehicle rides,
Therefore, the impact can be reduced .

[0011]

[0012] Manhole protection frame of the present invention, each of the divided portions of the divided blocks is preferably formed by connecting the locking means. By doing so, the divisions are connected via the locking means only by sequentially inserting around the manhole frame around the manhole frame, so that the laying work is simple and the positioning work can be easily performed. it can.

[0013] manhole protection frame body of the present invention, manhole
On the slope with the upper surface facing downwards.
A formed plate-shaped manhole protection frame, wherein the
The hole protection frame is approximately the same height as the manhole frame.
It has a thickness, a plurality of through holes are formed in the thickness direction,
A set of divided blocks divided into a plurality of pieces that have a general lattice shape
And the manhole protection frame comprises:
A concave groove is formed on the upper surface along the outer periphery, and the
The thickness of the inner peripheral portion into which the
Formed thicker than the height of the groove and the inner peripheral wall.
It is characterized by having a reflecting portion. With this feature
According to this, a plurality of through holes are formed in the thickness direction, and
It is formed so as to have a child shape and is divided into a plurality of portions.
Since the split blocks are installed in combination, manhole protection
The outer dimensions of the protective frame increase in proportion to the height of the manhole frame
Even though the weight is reduced, it can be easily transported and laid
The work is simplified and multiple grids penetrate even after installation
Can be filled with sand or crushed stone, for example.
As a result, a predetermined weight is ensured, and
Not only provides stability but also protects manholes
Since the inner and outer top surfaces of the frame reflect light,
The safety of pedestrians or vehicles in traffic is ensured.

[0014] Manhole protection frame body of the present invention, the dividing
The block is split radially, with each split
Preferably, they are connected by locking means . By doing so, the outer shape of the manhole protection frame is large.
Even if it is, it is arranged around the manhole frame and connected in order.
Laying work is simplified.
You.

The manhole protection frame body of the present invention, the dividing
The block is divided in the circumferential direction, and each division
Preferably, they are connected by a stop means . By doing so , also in the invention of claim 3,
Insert around the manhole frame sequentially around it
The split part is connected via the locking means.
The work is simple and the positioning work can be done easily.
You.

In the manhole protection frame according to the present invention, the divided block is integrally formed of an elastic body, and is formed on the inclined upper surface.
Preferably, a number of protrusions are formed . By doing so, vibrations and the like generated when passing through the vehicle are absorbed.
The shock is reduced and the protrusions pass over the inclined upper surface.
Is prevented from slipping.

[0017]

Embodiments of the present invention will be described below with reference to the accompanying drawings. First, FIG. 1 is a cross-sectional view showing a state in which a manhole protection frame according to a first embodiment of the present invention is laid on the ground, FIG. 2 is a perspective view of the manhole protection frame, and FIG. 3 is a manhole protection frame. It is a perspective view of the division | segmentation block in which the body was divided | segmented in the radial direction.

Reference numeral 1 denotes a manhole protection frame. The manhole protection frame 1 is inserted into the outer periphery of the manhole frame 2 and laid on the ground GL. The upper surface has a downwardly inclined surface facing outward. The inner peripheral edge of the central opening, which is formed in the shape of a circular disc and inserted into the cylindrical manhole frame 2, is the highest part, and the inner peripheral edge has substantially the same thickness as the height of the manhole frame 2. And a combination of a plurality of divided blocks 3 having a plurality of through holes formed in the thickness direction and having a substantially lattice-like appearance.

More specifically, the divided block 3 of the present embodiment is integrally formed of, for example, a hard rubber as an elastic body, is divided in a radial direction, and is formed in a sector shape. A plurality of projecting portions 5a and concave grooves 5b which can be fitted to each other as locking means are provided on the joint surface to be each divided portion.
Are formed.

Further, the divided block 3 has a plurality of projections 8 formed on the inclined upper surface where the ribs 7 constituting the plurality of lattices 4 intersect, and a lower portion of the inner peripheral wall inserted into the manhole frame 2. A concave groove 10 is formed at a predetermined position for inserting a rib R formed below the manhole frame 2, and a counterbore 9 for inserting an anchor 11 is formed at a predetermined position on the upper surface of the outer peripheral edge. ing.

The plurality of grids 4 formed in the divided block are formed from a combination of radial ribs 7a and annular ribs 7b, but the present invention is not limited to this shape. Can be considered.

Next, a description will be given of an installation procedure as a first embodiment of the manhole protection frame configured as described above.

First, as shown in FIG. 1, before the asphalt is laid, the manhole frame 2 having a height corresponding to the thickness of the asphalt to be laid is installed so as to protrude from the ground GL. The divided blocks 3 are arranged around the manhole frame 2.

Then, the concave groove 10 formed below the inner peripheral wall of each divided block 3 is inserted into the rib R formed below the manhole frame 2 and the joint surface of the divided blocks 9 adjacent to each other is fitted. The plurality of formed protrusions 5a and the recessed grooves 5b are sequentially locked.

When all of the divided blocks 9 are joined and arranged around the manhole frame 2, the anchor 11 is inserted into the counterbore 9 and fixed to the ground GL, and the state shown in FIG. Will be installed.

When the manhole protection frame 1 is installed on the ground GL in this way, the lattice 4 is finally filled with, for example, sand S, gravel, crushed stone, or the like, and the installation operation is completed.

With such a configuration, a plurality of grids 4 penetrating in the thickness direction are formed, and the divided blocks 3 divided into a plurality are installed in combination. Even if the outer shape becomes large in proportion to the height of 2, the weight can be reduced, the transportation becomes easy, and the laying operation can be simplified.

Further, by filling the plurality of grids 4 penetrating with, for example, sand S, gravel or crushed stone after the installation, a predetermined weight is ensured and stability can be obtained even when the vehicle is placed when passing through a vehicle or the like.

Further, the divided block 3 is divided in the radial direction, and the joint surface serving as each divided part has a plurality of protrusions 5a.
Since the connection is made by fitting the groove 5b, even if the outer shape of the manhole protection frame 1 is enlarged, it can be easily laid only by connecting the manhole protection frame 1 around the manhole frame 2 in order. it can.

Further, the divided block 3 is integrally formed of an elastic body such as hard rubber, for example, and a plurality of projections 8 are formed on the inclined upper surface where the ribs 7 constituting the plurality of grids 4 intersect. In addition, vibrations and the like generated when the vehicle passes through the vehicle are absorbed so that the shock is buffered, and the projection 8 prevents slippage when the vehicle passes over the inclined upper surface.

Further, since the manhole protection frame 1 installed around the manhole frame 2 is fixed to the ground by inserting the anchor 10 through the counterbore hole 9, vibration occurs when the vehicle passes. The stable state is maintained.

Next, the second embodiment of the manhole protection frame of the present invention will be described.
An embodiment will be described. FIG. 4 is an exploded perspective view of a divided block in which a manhole protection frame according to a second embodiment is divided in the circumferential direction. The same components as those described above are denoted by the same reference numerals, and detailed description will be omitted.

As in the first embodiment, the divided block 12 of the present embodiment is composed of a plurality of lattices, the upper surface of which is formed in a disk shape that is inclined downward toward the outside, and is divided in the circumferential direction to form an inner ring. Division block 13 and outer annular division block 1
4.

The inner annular divided block 13 has
An insertion hole 15 to be inserted into the outer periphery of the manhole frame 2 is formed, and a concave groove 10 for inserting a rib R formed below the manhole frame 2 below the inner peripheral wall of the insertion hole 15. It is formed at a predetermined location, and a counterbore 9 through which the anchor 11 is inserted is formed at a predetermined location on the inclined upper surface.

The outer annular divided block 14 has an insertion hole 16 in the center into which the inner annular divided block 13 is inserted, and the outer peripheral divided block 13 and the outer periphery of the inner annular divided block 13 inserted therein. A not-shown protrusion and a notch that can be fitted to each other, which serve as locking means, are formed on the joint surface with.

The manhole protection frame 12 of the present embodiment having the above-described structure is firstly provided with an inner annular divided block 13.
Is inserted into the outer periphery of the manhole frame 2, and the anchor 11 is inserted through the spot facing hole 9 to be fixed to the ground GL.

Next, the fixed inner annular divided block 1
The outer annular divided block 14 is inserted and connected to the outer periphery of the block 3 via locking means (not shown), and the anchor 11 is inserted into the counterbore hole 9 to be fixed to the ground GL.

As described above, since the divided portions are connected via the locking means (not shown) only by being sequentially inserted around the outer periphery of the manhole frame 2 as a center, the laying operation is simple and the positioning operation is reliably performed. Can be.

Next, FIG. 5 is a perspective view of a manhole protection frame according to a third embodiment of the present invention. The same components are denoted by the same reference numerals, and redundant description will be omitted.

The manhole protection frame 18 of the present embodiment is
In the case where only the inner annular divided block 13 of the above embodiment is used, since a step is formed between the outer periphery of the inner annular divided block 13 and the ground GL, the outer periphery of the inner annular divided block 13 has an upper surface. Is constructed by inserting an endless auxiliary frame body 19 inclined downward toward the outside.

In this manner, when only the inner annular divided block 13 divided in the circumferential direction is used, the step with the ground GL formed at the outer peripheral end is inclined by the auxiliary frame 19. Since the surface is formed, the impact can be reduced when the vehicle rides.

FIG. 6 shows a manhole protection frame according to a fourth embodiment. FIG. 6A is a perspective view of the manhole protection frame, and FIG. 6B is a partial cross section of the manhole protection frame. FIG.

The manhole protection frame 20 is composed of a plurality of lattices as in the above embodiment, and is formed in a disk shape having an upper surface which is inclined downward toward the outside, and an annular groove 21 is formed on the upper surface along the outer periphery. And a thick portion of the inner circumference of the insertion hole 23 inserted into the outer circumference of the manhole frame 2 is formed slightly higher than the height of the manhole frame 2.

The inner peripheral wall surfaces of the concave groove 21 and the insertion hole 23 are coated with, for example, a reflective paint which becomes the reflective portions 22 and 24. Here, the reflection portion is not limited to the reflection paint, and a reflection tape may be attached.

By doing so, the inner and outer peripheries of the insertion hole of the manhole protection frame 20 reflect light, so that the presence of the manhole protection frame 20 can be confirmed at night, and the presence of the pedestrian or vehicle can be confirmed. Traffic safety can be ensured.

Next, FIG. 7 is a perspective view of a manhole protection frame according to a fifth embodiment. The same components as those described above are denoted by the same reference numerals, and detailed description is omitted.

The manhole protection frame 25 is used for a square manhole frame. The manhole protection frame 25 is formed in the shape of a square plate having an upper surface having a downwardly inclined surface. Square insertion hole 2 to be inserted into the frame
6, the inner peripheral edge of the inner divided block 27 has substantially the same thickness as the height of the manhole frame, and is formed by a plurality of lattices 30 penetrating in the thickness direction. It is constituted by a combination of an outer divided block 29 having a square insertion hole 28 inserted into the outer periphery of the inner divided block 27.

These divided blocks 27 and 29 are installed around the manhole frame with their respective divided portions connected by locking means (not shown).

This divided block can be divided not only in the circumferential direction but also in the radial direction, similarly to the above-described embodiment. Can be formed.

The reflecting portion is provided on the inner peripheral wall of the square insertion hole 26 and the concave groove formed on the upper surface of the outer peripheral edge, and the projection is provided on the inclined upper surface. . The procedure for installing the manhole protection frame according to the present embodiment is the same as the procedure of the above-described embodiment, and thus the description thereof will be omitted.

[0051]

The present invention has the following effects.

(A) According to the first aspect of the present invention, a plurality of through-holes are formed in the thickness direction, are formed so as to have a substantially lattice-like appearance, and are divided into a plurality of circumferentially- divided blocks. Even if the manhole protection frame increases in size in proportion to the height of the manhole frame, the weight is reduced, the transportation is easy, the laying work is simplified, and even after installation, A plurality of grids that penetrate can be filled with, for example, sand or crushed stone, whereby a predetermined weight is secured , and not only stability is obtained even when passing through a vehicle or the like, but the grid is divided in the circumferential direction. Inside
If only divided blocks are used, form
The step with the ground to be formed is inclined by the endless auxiliary frame.
Is formed, so that when the vehicle rides,
Therefore, the impact can be reduced.

(B) According to the second aspect of the present invention, the manhole frame is divided only by being sequentially inserted around the manhole frame.
Since the parts are connected via locking means, installation work is simple
In addition, the positioning operation can be easily performed.

(C) According to the third aspect of the invention, the thickness direction
A plurality of through holes are formed in the
And divided into a plurality of divided blocks
The manhole protection frame is
Even if the external dimensions increase in proportion to the height of the
It is easy to carry and the laying work is simplified,
Several grids penetrate even after installation, such as sand and crushed stone
Etc., which allows the
The weight is secured, and stability is obtained even when passing vehicles.
As well as inside and outside the manhole protection frame
Since the upper surface reflects light, pedestrians and
The safety of vehicles is ensured.

(D) According to the fourth aspect of the invention, the manho
Split by simply inserting around the frame around the frame
Since the parts are connected via locking means, installation work is simple
In addition, the positioning operation can be easily performed.

(E) According to the invention of claim 5, claim 3
In the invention in the above, the manhole frame
Just by sequentially inserting around it, the divided part will
Laying work is easy and positioning work
Work can and child to easily carry out.

(F) According to the invention of claim 6, vehicle passing
The vibrations that occur at times are absorbed and the shock is reduced,
The projection prevents slippage when passing over the inclined upper surface.

[0058]

[0059]

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a state in which a manhole protection frame according to a first embodiment of the present invention is laid on the ground.

FIG. 2 is a perspective view of a manhole protection frame according to the first embodiment of the present invention.

FIG. 3 is a perspective view of a divided block in which a manhole protective frame as a first embodiment of the present invention is divided in a radial direction.

FIG. 4 is an exploded perspective view of a divided block in which a manhole protection frame according to a second embodiment of the present invention is divided in a circumferential direction.

FIG. 5 is a perspective view of a manhole protection frame according to a third embodiment of the present invention.

FIG. 6A is a perspective view of a manhole protection frame,
(B) is a partial cross-sectional view of the manhole protection frame.

FIG. 7 is a perspective view of a manhole protection frame as a fifth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Manhole protective frame 2 Manhole frame 3 Division block 4 Lattice 5a Projection 5b Concave groove 7a Radial rib 7b Annular rib 8 Projection 9 Counterbore hole 10 Concave groove 11 Anchor 12 Division block 13 Inner annular division block 14 Outside annular Divided block 15, 16 Insert hole 18, 20 Manhole protection frame 19 Auxiliary frame 21 Depressed groove 22, 24 Reflector 23 Insert hole 25 Manhole protection frame 26 Square insertion hole 27, 29 Division block 28 Square insertion Hole 30 Grid GL Ground R Rib S Sand

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Toshihiko Minamiyama 790-Tabeta-cho, Wakaba-ku, Chiba-shi Inside Yabutsuka Construction Materials Kogyo Co., Ltd. (56) References JP-A-7-38246 (JP, A) JP-A-7 -34479 (JP, A) JP-A-6-8452 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E02D 29/12-29/14 E01C 9/08

Claims (6)

(57) [Claims] 1. A plate-shaped manhole protection frame which is inserted into a manhole frame and has an upper surface formed on a slope inclined downward toward the outside, wherein the manhole protection frame has a height equal to the height of the manhole frame. have substantially the same thickness, is formed with a plurality of through-holes in the thick viewed direction, Ri formed from a combination of multiple divided divided blocks circumferentially giving the appearance substantially lattice-shaped, is divided in the circumferential direction
An auxiliary frame that can be inserted around the inner frame
The auxiliary frame body has an upper surface inclined downward toward the outside.
Manhole protective frame body, wherein forming isosamples consists of frame endless. 2. A manhole protective frame according to claim 1, each of the divided portions of the divided blocks, which are connected by the locking means. 3. The manhole frame is inserted into the manhole frame so that the upper surface faces outward.
A plate-shaped manhole cover formed on a slope that slopes downward
A protective frame , wherein the manhole protective frame is substantially equivalent to the height of the manhole frame.
It has the same thickness, and a plurality of through holes are formed in the thickness direction.
Divided into a plurality of divided blocks
The manhole protection frame
The body forms a concave groove on the upper surface along the outer circumference and
The thickness of the inner peripheral part where the
Formed in a thickness greater than the height of the
A manhole protection frame, comprising a reflecting portion provided on a peripheral wall . 4. The divided block is divided in a radial direction.
And each divided part is connected by a locking means.
The manhole protection frame according to claim 3 . 5. The divided block is divided in a circumferential direction.
And each divided part is connected by a locking means.
The manhole protection frame according to claim 3 . 6. The divided block is formed integrally with an elastic body.
Wherein a plurality of protrusions are formed on the inclined upper surface.
Item 4. The manhole protective frame according to Item 3 .