JP2003003508A - Curing cover for manhole cover and fixing tool thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a curing cover for a manhole cover and a fixing tool thereof, which can be mounted on the single manhole cover, can maintain a state of being adequately fixed onto the manhole cover, even in the case of passage of a heavy vehicle, and can be easily mounted/demounted. SOLUTION: This curing cover is equipped with an annular rigid plate 4 which covers a peripheral part of a top surface of the manhole cover 1, an elastic plate 5 which has expansibility and is provide in a tensioned state in an inside opening of the plate 4, and the fixing tool 6 which makes the plate 4 fixed to the manhole cover 1 by engaging a top surface of the plate 4 with a bottom surface of an opening of a crowbar hole 7 of the manhole cover 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective cover for a manhole cover and a fixture therefor, and more particularly to a vehicle using a burr hole of a manhole cover (a hole for inserting a burr tip when the manhole cover is opened and closed). TECHNICAL FIELD The present invention relates to a curing cover for a manhole cover and a fixture for the manhole cover, which can be firmly fixed on the manhole cover so as to endure passage and can be easily attached or detached.

[0002]

2. Description of the Related Art In construction work or civil engineering work in which a manhole cover is installed, mud, asphalt, etc. may adhere to the manhole cover or rust may occur between the time when the manhole cover is installed and the completion of the work. It is necessary to prevent that. In general, it is widely practiced to place a veneer plate on a manhole cover and fix the veneer plate to the manhole cover with an adhesive tape. However, the curing with the veneer plate cannot be perfectly fitted due to the planar shape of the veneer plate, and earth and sand may enter between the veneer plate and the manhole cover, which may cause scratches and rust. In addition, in this method, after the adhesive tape is removed, a mark of the tape remains, and it takes a lot of time and effort to remove it.

On the other hand, various types of curing covers have been devised which are suitable for manhole covers. For example, JP-A-5-51937 and JP-A-11-81359 have a circular plate formed to fit a manhole cover, and the circular plate has a peripheral portion between the manhole cover and the manhole frame. There is disclosed a curing cover for a manhole lid, which is provided with a claw inserted into the gap and fixes the circular plate on the manhole lid by inserting the claw into the gap to cure the manhole cover.

Further, in Japanese Patent Laid-Open No. 8-113957, there is provided a circular plate formed so as to cover the upper surface of the manhole cover, and a projection portion which fits into a burr hole of the manhole cover is provided on the peripheral portion of the circular plate. And a circular plate is fixed on the manhole cover by fitting a protrusion into the burl hole to cure the manhole cover.

Further, in Japanese Utility Model Laid-Open No. 7-10048, a circular thin sheet material having a rubber band on the peripheral portion is formed, and the sheet material covers the upper surface of the manhole lid and further wraps around the peripheral portion of the manhole lid. There is disclosed a curing cover for a manhole cover which can be attached to the manhole cover by a contraction force of a rubber band on the lower surface of the manhole cover.

[0006]

However, Japanese Unexamined Patent Publication (Kokai) No. 5-5.
The curing cover of the manhole cover taught by Japanese Patent Laid-Open No. 1937 and Japanese Patent Application Laid-Open No. 11-81359 is premised on inserting a claw into a gap between the manhole cover and the manhole frame, and the manhole cover alone is used for curing. Can not do it.

Further, the force for fixing the curing cover is limited only by inserting the claw into the gap between the manhole cover and the manhole frame, and the cover body is deformed due to the weight of the vehicle or is bounced by the wheels. The nails may fall off due to lifting.

On the other hand, the curing cover for the manhole lid taught by Japanese Patent Laid-Open No. 8-113957 is attached to the manhole cover by itself because the curing cover is attached using the burr holes of the manhole cover as in the present invention described later. However, since the protrusion is fixed by simply inserting it into the burl hole of the manhole cover, the fixing force is weak as in the prior art, and the protrusion is caused by the deformation of the cover body when the vehicle passes or the flipping up by the wheel. Part may come off.

Since the protective cover of the manhole cover taught by Japanese Utility Model Laid-Open No. 7-10048 is made of a sheet material, it cannot withstand the weight of the vehicle sufficiently and cannot protect the manhole cover from scratches. Is not enough as a curing cover.

Therefore, in view of the problems of the conventional manhole cover curing cover described above, the problem to be solved by the present invention is that the manhole cover can be attached to a single manhole cover, and
It is an object of the present invention to provide a curing cover for a manhole lid and a fixture for the manhole lid, which can be sufficiently fixed on the manhole lid even when a heavy vehicle passes by and can be easily attached and detached.

[0011]

A curing cover for a manhole cover according to a first aspect of the present invention has an annular rigid plate that covers the peripheral edge of the upper surface of the manhole cover, and a stretchable material that is stretched over the inner opening of the annular rigid plate. An elastic plate having, and a fixture for fixing the annular rigid plate to the manhole cover by engaging the upper surface of the annular rigid plate and the bottom surface of the burr hole opening of the manhole cover. is there.

According to the present invention, by combining a rigid annular rigid plate and an elastic plate, the annular rigid plate is firmly fixed to the peripheral portion of the manhole cover by a fixture, and the elastic plate fits perfectly to the central portion of the manhole cover. Accordingly, even when the heavy vehicle passes over the manhole cover, the entire curing cover is not deformed by the force received by the center portion of the curing cover and the fixture is not detached. On the other hand, unlike the thin sheet material, the elastic plate of the present invention can prevent the manhole cover from being scratched.

According to a second aspect of the present invention, there is provided a curing cover for a manhole lid, wherein the fixing tool is the curing cover according to the first aspect.
A rod-shaped member that has the annular rigid plate inserted vertically and has a nut that is bulged or screwed to the head, a tubular member that internally inserts the rod-shaped member from below, and the rod-shaped member that is inserted from below. And an elongated engaging member that abuts on the bottom of the tubular member and at least one end of which engages with the bottom surface of the burr hole opening, and below the rod-shaped member so as to support the engaging member from below. And a nut that is screwed from the.

In the fixture of the present invention, the bulged portion of the head of the rod-shaped member or the nut presses the annular rigid plate, the engaging member engages with the bottom surface of the burr hole opening of the manhole cover, and both of them are rod-shaped. Tighten with the member and the nut at the lower end.
As a result, the annular rigid plate does not easily come off, and the curing cover body (annular rigid plate and elastic plate) can be firmly fixed on the manhole cover even with a large load.

A curing cover for a manhole cover according to claim 3 of the present application is the curing cover according to claim 1, wherein the fixture is
A rod-shaped member that has the annular rigid plate inserted vertically and has a nut that is bulged or screwed to the head, and a first engagement means for inserting the rod-shaped member from below and twisting the head. The tubular member provided and the rod-shaped member are inserted from below,
An elongated engagement member that abuts the bottom of the tubular member and at least one end of which engages with the bottom surface of the burr hole opening;
A nut screwed from below the rod-shaped member so as to support the engaging member from below.

The fixture of the present invention comprises first engaging means for twisting on the head of the tubular member. By twisting the tubular member by the first engagement means, the engagement state between the engagement member and the bottom surface of the burr hole opening of the manhole cover can be easily released. That is, the curing cover can be easily removed by twisting the first engaging means of the tubular member.

According to a fourth aspect of the present invention, there is provided a curing cover for a manhole lid, wherein the fixing tool is the curing cover according to the first aspect.
A rod-shaped member that has the annular rigid plate inserted vertically and has a nut that is bulged or screwed to the head, and a first engagement means for inserting the rod-shaped member from below and twisting the head. The tubular member provided and the rod-shaped member are inserted from below,
An elongated shape having second engaging means for abutting against the bottom of the tubular member and engaging with the bottom of the tubular member to rotate integrally therewith, at least one end of which engages with the bottom surface of the burr hole opening. The engaging member and the nut screwed from below the rod-shaped member so as to support the engaging member from below.

The fixture of the present invention comprises first engaging means for twisting the head of the tubular member, and second engaging means for integrally rotating the tubular member and the engaging member. There is. Accordingly, by twisting the tubular member by the first engaging means, the engaging member can be reliably rotated, and the engagement state with the manhole cover can be easily released.

According to a fifth aspect of the present invention, there is provided a curing cover for a manhole cover, wherein a rigid plate covering the entire upper surface of the manhole cover and an upper face of the rigid plate and a bottom face of a burr hole opening of the manhole cover are engaged to provide the rigidity. A fixing member for fixing the plate to the manhole cover, wherein the fixing member is a rod-shaped member having the rigid plate vertically inserted and having a nut bulged or screwed to the head, and the rod-shaped member downward. An elongated engagement member in which the cylindrical member inserted from above and the rod-shaped member are inserted from below, abutting against the bottom of the cylindrical member, and at least one end of which engages with the bottom surface of the burr hole opening. And a nut screwed from below the rod-shaped member so as to support the engagement member from below.

According to the present invention, the body of the curing cover is composed of only the rigid plate, and the rigid plate is fixed to the manhole cover by the fixing tool. In the present invention, the weight of the vehicle or the like is received by the rigid plate. The rigid plate is securely fixed on the manhole cover by a fixture. By the cooperation of the rigid plate and the fixture,
The curing cover does not come off even when the vehicle passes by.

According to a sixth aspect of the present invention, there is provided a curing cover for a manhole cover, the rigid plate covering the entire upper surface of the manhole cover, the upper surface of the rigid plate and the bottom surface of the burr hole opening of the manhole cover engaging with the rigidity. A fixing member for fixing the plate to the manhole cover, wherein the fixing member is a rod-shaped member having the rigid plate vertically inserted and having a nut bulged or screwed to the head, and the rod-shaped member downward. A cylindrical member having first engaging means for twisting the head and the rod-shaped member from below, abutting against the bottom of the cylindrical member, and at least one end of which is a burl. It is characterized in that it has an elongated engaging member that engages with the bottom surface of the hole opening, and a nut screwed from below the rod-shaped member so as to support the engaging member from below.

According to the present invention, the engaging state of the engaging member can be released by twisting the first engaging means of the tubular member, and the rigid plate as the curing cover body can be removed.

According to a seventh aspect of the present invention, there is provided a curing cover for a manhole cover, the rigid plate covering the entire upper surface of the manhole cover, and the rigidity by engaging the upper surface of the rigid plate and the bottom surface of the burr hole opening of the manhole cover. A fixing member for fixing the plate to the manhole cover, wherein the fixing member is a rod-shaped member having the rigid plate vertically inserted and having a nut bulged or screwed to the head, and the rod-shaped member downward. From the bottom and the cylindrical member having a first engaging means for twisting into the head, and the cylindrical member is brought into contact with the bottom of the cylindrical member and engages with the bottom of the cylindrical member. An engaging member having an elongated shape in which at least one end is engaged with the bottom surface of the burr hole opening, and the engaging member is supported from below. Screwed from below the rod-shaped member Tsu and bets, is characterized in that it has a.

According to the present invention, the engagement member is integrally rotated by the second engagement means by twisting the first engagement means of the tubular member, releasing the engagement state of the engagement member, and A rigid plate can be removed.

The curing cover for a manhole cover according to claim 8 of the present application is the curing cover according to any one of claims 5 to 7, wherein the rigid plate has a release agent or a release material between the rigid plate and the manhole cover. It is characterized by that.

The present invention has a release agent or release material between the rigid plate and the manhole cover, and the release agent or release material protects the manhole cover from scratches and rust during curing.
When removing the curing cover, the rigid cover can be easily removed.

A curing cover fixing device for a manhole cover according to claim 9 of the present application comprises a rod-shaped member having a bulge or a screwed nut on the head, and a tubular member having the rod-shaped member inserted from below. An elongated engagement member that is inserted through the rod-shaped member from below, contacts the bottom of the tubular member, and has at least one end engaged with the bottom surface of the burr hole opening of the manhole cover; And a nut screwed from below the rod-shaped member so as to support the above from below.

A curing cover fixing device for a manhole cover according to a tenth aspect of the present invention has a rod-shaped member having a bulged portion or a nut screwed to the head, and the rod-shaped member is inserted from below and twisted to the head. A cylindrical member having a first engagement means for inserting the rod-shaped member from below, abutting against the bottom of the cylindrical member, at least one end of which is engaged with the bottom surface of the burl hole of the manhole cover. An elongated engaging member that fits,
A nut screwed from below the rod-shaped member so as to support the engaging member from below.

According to an eleventh aspect of the present invention, there is provided a curing cover fixing device for a manhole lid, which has a rod-shaped member having a bulging portion or a nut screwed to the head, and the rod-shaped member inserted from below and twisted to the head. A cylindrical member having a first engagement means for inserting the rod-shaped member from below, abutting against the bottom of the cylindrical member and engaging with the bottom of the cylindrical member to rotate integrally An elongated engaging member having engaging means, at least one end of which engages with the bottom surface of the burr hole opening of the manhole cover, and a screw from below the rod-shaped member so as to support the engaging member from below. It is characterized by having a nut that has been worn.

[0030]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of a "curing cover for a manhole cover and its fixing tool" according to the present invention will be described below with reference to the drawings.

FIG. 1 is a vertical sectional view of a manhole cover having a curing cover according to an embodiment of the present invention. FIG. 2 shows a plan view of the manhole cover with the curing cover attached.

The manhole cover 1 is installed on the manhole frame 2, and the curing cover 3 according to the embodiment of the present invention is mounted thereon.

The curing cover 3 has an annular rigid plate 4, an elastic plate 5, and a fixture 6. The annular rigid plate 4 is made of a plate material having a high rigidity, such as a steel plate or other metal plate or a hard resin, and is formed in a shape and size suitable for covering the upper surface of the peripheral portion of the manhole cover 1. Holes for inserting rod-shaped members (described later) of the fixture 6 are provided at three positions aligned with the burl holes 7 of the manhole cover of the annular rigid plate 4.

The elastic plate 5 is made of a stretchable material, such as rubber, vulcanized rubber, or engineering plastic, and is stretched over the inner opening of the annular rigid plate 4. The method of stretching is not limited to this, but the peripheral edge of the elastic plate 5 can be bonded to the upper surface of the inner opening of the annular rigid plate 4.
The elastic plate 5 can be perfectly adapted to the curvature of the upper surface of the manhole cover 1 when the annular rigid plate 4 is installed on the peripheral portion of the manhole cover 1. Further, the elastic plate 5 has such a thickness and strength that it can protect the manhole cover 1 from scratches against the passage of vehicles.

The fixture 6 engages both the upper surface of the annular rigid plate 4 and the bottom surface of the opening of the burl hole 7 to fix the annular rigid plate 4 to the manhole cover 1. The fixture 6 can be any known fastener as long as it exhibits the above function, but the fixture 6 according to the present embodiment will be described with reference to FIGS. 3 and 4.

FIG. 3 is a vertical cross-sectional view showing a state in which the fixture 6 is attached, and FIG. 4 is a view showing the fixture 6 viewed from the direction of arrow AA shown in FIG. The fixture 6 has a rod-shaped member that penetrates the annular rigid plate 4 and has a nut that is bulged or screwed to the head. In this embodiment, the stud bolt 8 is used as the rod-shaped member. Reference numeral 9 indicates a washer. Around the stud bolt 8, there is a tubular member 10 into which the stud bolt 8 is inserted from below. Further, a stud bolt 8 is inserted from below the tubular member 10 so as to come into contact with the bottom of the tubular member 10 and at least one end thereof engages with an elongated bottom surface of the opening of the burr hole 7. A member 11 is provided. An elastic body is preferably provided below the engaging member 11. In this embodiment, the spring 12 is used as an elastic body. Spring 12
Absorbs a manufacturing error of the size of the fixture 6 (length of the tubular member 10) and the depth of the burl hole 7, and the engaging member 11 and the nut 1
4 rotation is suppressed to improve the operability of the fixture 6,
It is also possible to omit this. A nut 14 is screwed below the spring 12 via a washer 13,
I support you.

By tightening the nut 14, as shown in FIG.
As shown in FIG. 1, the engaging member 11 has a cylindrical member 1 at one end thereof.
0 and the other end firmly engages with the bottom surface of the opening of the burl hole 7, so that the annular rigid plate 4 can be pressed firmly onto the manhole cover 1.

5 to 7 show a method of attaching the fixture 6 in chronological order. FIG. 5 shows a state in which the mounting is started. First, the stud bolt 8 is passed through the annular rigid plate 4 so that the length direction of the engaging member 11 is aligned with the radial direction of the manhole cover 1 and the bottom portion of the burl hole 7 is aligned. Through the burr hole 7
The engaging member 11 is rotated about 90 degrees below the opening of the.

FIG. 6 shows the fixture 6 in this state.
That is, the engaging member 11 is below the opening of the burr hole 7, and one end thereof is not engaged with the lower surface of the opening of the burl hole 7, but is in an engageable state.

Next, FIG. 7 shows a process of tightening the fixture 6. As shown in FIG. 7, in order to tighten the fixture 6, the stud bolt 8 is tightened while pulling up the stud bolt 8 in the P direction from the state of FIG. 6 (R direction).

By pulling up the stud bolt 8 in the P direction, the engaging member 11 engages with the tubular member 10 and the bottom surface of the opening of the burl hole 7 at points a and b in FIG. 7, and the rotation is restricted. The force that pulls up the stud bolt 8 in the P direction presses the engaging member 11 and the nut 14 via the spring 12 and limits the rotation of both. By tightening the stud bolt 8 in this state, the lower end of the stud bolt 8 is deeply screwed into the nut 14, and if tightened for a certain amount or more, the stud bolt 8 does not need to be pulled up. The distance between the engaging member 11 and the engaging member 11 is reduced, and the annular rigid plate 4 is attached to the manhole cover 1
Can be firmly fixed to.

The same applies when the engaging member 11 engages with the bottom surface of the opening of the burl hole 7 at both ends.

In the curing cover 3 of this embodiment, the annular rigid plate 4 is fixed to the peripheral portion of the manhole cover 1 by using the above-mentioned fixing tool 6, and as a result, the elastic plate 5 is curved and stretched to fix the manhole cover 1. Fits perfectly on the top surface.

By combining the annular rigid plate 4 and the elastic plate 5, the curing cover 3 can be effectively prevented from falling off. That is, the annular rigid plate 4 is firmly fixed to the peripheral portion of the manhole cover 1 by the fixture 6, the elastic plate 5 fits perfectly to the center of the manhole cover 1, and in this state, the heavy vehicle passes over the manhole cover 1. However, the force applied to the central portion of the curing cover does not deform the entire curing cover, and the fixing tool 6 does not come off due to the distortion or the force. In addition, even if a heavy vehicle passes over the annular rigid plate 4,
The fastening effect of the fixture 6 is high, and it is very unlikely to come off. Therefore, the curing cover 3 can be suitably used as a manhole cover for a road.

Further, since the elastic plate 5 is naturally deformed along the curved surface of the manhole cover 1 and adapted to the curing cover 3, a high-level manufacturing technique is required to manufacture it according to the curved surface of the manhole cover 1. do not do. Although it is necessary to manufacture the annular rigid plate 4 so as to match the peripheral portion of the manhole cover 1, this portion has little curvature and is easy to manufacture. in this way,
Although the curing cover according to the present invention is easy to manufacture, it can be in close contact with the manhole cover 1 without any gaps, prevent ingress of dirt and the like, and protect the manhole cover 1 from scratches and rust.

Further, the curing cover according to the present invention can be attached to the manhole cover alone without utilizing the gap between the manhole cover and the manhole frame.
It can be attached to the manhole cover before it is installed, which is convenient for storing the manhole cover before installation.

FIG. 8 shows another embodiment of the fixture. As shown in FIG. 8 in which the same parts as those in FIGS. 6 and 7 are denoted by the same reference numerals, the fixture 15 of the present embodiment includes first engagement means 17 for twisting the head of the tubular member 16. A second engaging means 19 for engaging with the bottom portion of the tubular member and integrally rotating the same is provided in a part of the engaging member 18.

The first engaging means 17 is specifically composed of a parallel portion 16b provided on the outer peripheral portion of a flange portion 16a provided on the head of the tubular member 16. The parallel portion 16b can be sandwiched and rotated by a tool such as a monkey wrench, so that the entire tubular member 16 can be rotated about the axis of the stud bolt 8.

The second engaging means 19 specifically comprises a groove 18a provided in the engaging member 18 and an engaging projection 16c provided in the bottom portion of the tubular member 16.

The attachment of the fixture 15 is similar to the attachment of the fixture described with reference to FIGS. 5 to 7, but the removal can be made extremely easy by one operation.

That is, in order to remove the fixture 15, the parallel portion 16b of the tubular member 16 is moved from the engaged state shown in FIG.
When the (first engagement means 17) is clamped and rotated by a tool (twisted), the rotation of the tubular member 16 is transmitted to the engagement member 18 by the second engagement means 19 and the engagement member 18 and the manhole. The lid can be disengaged from the bottom surface of the burr hole opening. That is, the fixture 15 can be immediately released by one operation of "twisting".

In the engaged state, the elastic member of the spring 12 presses the engaging member 18 and the cylindrical member 16
If it can be expected to rotate integrally with the second engaging means 19, the second engaging means 19 can be omitted. That is, there may be a fixture having only the first engaging means and a fixture having both the first and second engaging means.

The first engaging means can have any structure that can be made by those skilled in the art as long as the tubular member can be twisted with respect to the axis of the tubular portion. Similarly, the second engaging means can have a structure that a person skilled in the art can arbitrarily make as long as the tubular member and the engaging member can be integrally rotated. Further, the engaging member does not have to be a rectangular plate member as long as the end portion has an elongated shape capable of engaging with the bottom surface of the burr hole opening of the manhole cover. FIG. 9 shows another form of fixture as an example.

In FIG. 9, in which the same parts as those in FIGS.
1 and second engaging means 22.

The first engaging means 21 is provided with a flange portion 23a at the head of the cylindrical member 23, a part of which is extended, and an engaging hole 23b (arbitrary opening shape can be formed at the tip end portion thereof. )
Is provided.

The second engaging means 22 has the shape of the engaging member 24 and the shape of the lower portion of the tubular member. That is, the tubular member 2
3 has a groove 23c which is symmetrical with respect to the axis at the lower part of its cylindrical portion, and the engaging member 24 has an elongated shape which fits into the groove 23c except for the ring portion through which the stud bolt 8 is inserted.

According to the fixture 20 of the present embodiment, when a proper tool is inserted into the engaging hole 23b of the first engaging means 21 from the attached state and the axial portion of the tubular member 23 is twisted, The member 23 rotates, and the rotation causes the second engaging means 2 to rotate.
The engaging member 24 is integrally rotated via the two. As a result, the fixture 20 can be removed by one operation of "twisting".

FIG. 10 shows another embodiment of the curing cover. In the curing cover 25 according to the present embodiment, the peripheral edge of the elastic plate 27 is bonded to the lower surface of the inner opening of the annular rigid plate 26, and the peripheral edge of the elastic plate is attached to the upper surface of the inner opening of the annular rigid plate. It differs from the curing cover 3 of FIG. 3 which is adhered. Other configurations are similar to those of the curing cover 3 shown in FIG. As the fixture, the above-mentioned various fixtures can be used.

According to this embodiment, since the edge portion of the inner opening of the annular rigid plate 26 covers the adhesive portion of the elastic plate 27 from above, the adhesive portion is protected from external force such as wheel passage and peeled. It has a difficult advantage. Other advantages are the same as those of the curing cover 3 described above.

FIG. 11 shows a curing cover for a manhole cover according to still another embodiment of the present invention. Figure 11
Then, the same parts as those in FIG. 1 are denoted by the same reference numerals.

In the present embodiment, the curing cover 28 has a rigid plate 29 that covers the entire upper surface of the manhole cover 1, and the fixture 6
It is fixed to the manhole cover 1 by.

It is desirable that the rigid plate 29 has a rigidity that does not cause deformation such that the fixture 6 is disengaged due to the weight of the vehicle. Further, preferably, the rigid plate 29 is curved substantially along the curved surface of the manhole cover 1. As the fixture, the above-mentioned various fixtures can be used.

According to the curing cover 28 of the present embodiment, the rigid plate 29 is so rigid that it is not significantly deformed by the weight of the vehicle, and is firmly fixed to the manhole cover 1 by the fixture 6. , It does not come off due to the passage of vehicles. The advantages such as easy attachment / detachment of the fixture and the ability to cure the manhole cover by itself are similar to those of the curing car according to another embodiment of the present invention.

FIG. 12 shows a curing cover for a manhole cover according to another embodiment of FIG. 12
Then, the same parts as those in FIG. 1 are designated by the same reference numerals.

In the present embodiment, the curing cover 30 has a rigid plate 31 that covers the entire upper surface of the manhole cover 1, and further, a release agent or a release material (hereinafter collectively referred to as “release agent” between the manhole cover 1 and the rigid plate 31). The release agent (material) 32 ″) is included.

It is desirable that the rigid plate 31 has a rigidity that does not cause the fixing tool 6 to be dislocated by the weight of the vehicle. However, the rigid plate 31 is the manhole cover 1
There are few demands that it is curved along the curved surface of.

The release agent is, for example, a coating release agent containing acetone as a main component and is a coating agent that can be applied to the upper surface of the manhole cover 1 and can fill the gap between the rigid plate 31 and the manhole cover 1. The release material is a cushion material that is placed between the rigid plate 31 and the manhole cover 1 to fill the gap between the rigid plate 31 and the manhole cover 1.

The rigid plate 31 is arranged on the release agent (material) 32 and fixed by the fixing tool 6. As the fixture, the various fixtures described above can be used.

Thus, the rigid plate 31 and the manhole cover 1
By providing a release agent (material) 32 between the rigid plate 3 and
The requirement for manufacturing accuracy (curved surface, etc.) of No. 1 can be relaxed, the impact of a traveling vehicle can be mitigated, and foreign matter can be prevented from entering and rust can be prevented from occurring.

[0070]

As is apparent from the above description, according to the "manhole cover curing cover and its fixture" of the present invention, the conventional cover cannot be cured by the manhole cover alone, or in a vehicle or the like. It is possible to solve the problem of insufficient curing or detachment when a heavy object passes, and it is possible to realize sufficient curing without detachment due to the passage of a heavy object such as a vehicle.

Further, according to the "fixing device" of the present invention, it is easy to attach and remove the curing cover of the manhole cover, and particularly, according to the fixing device having the first engaging means or the second engaging means. It is possible to obtain a fixing tool that can be removed in one operation.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a manhole cover curing cover according to an embodiment of the present invention.

2 is a plan view of a curing cover for the manhole cover of FIG. 1. FIG.

FIG. 3 is an enlarged vertical sectional view of a fixture portion of a curing cover for a manhole cover according to an embodiment of the present invention.

FIG. 4 is a vertical cross-sectional view of the fixture seen in the direction of arrow AA in FIG.

FIG. 5 is a plan view for explaining the first step of the attachment method of the fixture.

FIG. 6 is a vertical cross-sectional view for explaining the second step of the attachment method of the fixture.

FIG. 7 is a vertical cross-sectional view for explaining a third step of the attachment method of the fixture.

FIG. 8 is an exploded perspective view showing a fixture according to another embodiment of the present invention.

FIG. 9 is an exploded perspective view of a fixture according to another exemplary embodiment of the present invention.

FIG. 10 is an enlarged vertical sectional view showing a part of a manhole cover curing cover according to another embodiment of the present invention.

FIG. 11 is a vertical sectional view of a manhole cover curing cover according to another embodiment of the present invention.

FIG. 12 is a vertical cross-sectional view of a manhole cover curing cover according to another embodiment of the present invention.

[Explanation of symbols]

1 manhole cover 2 manhole frame 3 curing cover 4 annular rigid plate 5 elastic plate 6 fixtures 7 bar holes 8 stud bolt 9 washers 10 Cylindrical member 11 Engagement member 12 springs 13 washer 14 nuts 15 Fixture 16 Cylindrical member 16a collar part 16b Parallel part 16c engagement protrusion 17 First engaging means 18 Engagement member 18a groove 19 Second engaging means 20 Fixture 21 first engaging means 22 Second engaging means 23 Cylindrical member 23a collar part 23b Engagement hole 23c groove 24 Engagement member 25 curing cover 26 annular rigid plate 27 elastic plate 28 Curing cover 29 Rigid plate 30 curing cover 31 rigid plate 32 Release agent (material)

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hideki Oishi             Ando Construction, 3-12-8 Shibaura, Minato-ku, Tokyo             Within the corporation (72) Inventor Sawata Zenhiro             Ando Construction, 3-12-8 Shibaura, Minato-ku, Tokyo             Within the corporation (72) Ministry of Inventors             Ando Construction, 3-12-8 Shibaura, Minato-ku, Tokyo             Within the corporation (72) Inventor Makoto Mori             Ando Construction, 3-12-8 Shibaura, Minato-ku, Tokyo             Within the corporation (72) Inventor Yuuji Inoue             Ando Construction, 3-12-8 Shibaura, Minato-ku, Tokyo             Within the corporation F-term (reference) 2D047 BB00

Claims (11)

[Claims] 1. A ring-shaped rigid plate covering a peripheral edge of an upper surface of a manhole cover, an elastic plate stretched in an inner opening of the ring-shaped rigid plate, an upper surface of the ring-shaped rigid plate and a burl of the manhole cover. A fixture for fixing the annular rigid plate to the manhole cover by engaging with the bottom surface of the hole opening, and a curing cover for the manhole cover. 2. The fixing member is a rod-shaped member having a nut that is formed by vertically inserting the annular rigid plate and having a bulging portion or a screwed portion on the head, and a cylindrical member in which the rod-shaped member is inserted from below. A member, an elongated engagement member that is inserted through the rod-shaped member from below, contacts the bottom of the tubular member, and has at least one end engaged with the bottom surface of the burr hole opening, and the engagement member. The nut cover screwed from below the rod-shaped member so as to be supported from below, and the curing cover for the manhole cover according to claim 1. 3. The fixing member includes a rod-shaped member having a nut which is vertically inserted through the annular rigid plate and has a bulged portion or a screwed-on nut on the head, and the rod-shaped member is inserted from below to provide a head. A tubular member having a first engaging means for twisting the rod member, and the rod-shaped member inserted from below, abutting against the bottom of the tubular member, and at least one end engaging the bottom surface of the burr hole opening. 2. The manhole cover curing cover according to claim 1, further comprising an elongated engaging member, and a nut screwed from below a rod-shaped member so as to support the engaging member from below. . 4. The fixing member includes a rod-shaped member having a nut that is vertically inserted through the annular rigid plate and has a bulged portion or a screwed-on nut on the head, and the rod-shaped member is inserted from the lower side to the head. A cylindrical member having a first engaging means for twisting, and the rod-shaped member inserted from below, abutting against the bottom of the cylindrical member and engaging with the bottom of the cylindrical member to rotate integrally. An elongated engagement member having a second engagement means, at least one end of which engages with the bottom face of the burr hole opening; and a screw member screwed from below the rod-shaped member so as to support the engagement member from below. The curing cover for the manhole cover according to claim 1, further comprising: 5. A rigid plate that covers the entire upper surface of the manhole cover, and a fixture that fixes the rigid plate to the manhole cover by engaging the upper surface of the rigid plate and the bottom surface of the burr hole opening of the manhole cover. The fixing member includes a rod-shaped member having the rigid plate vertically inserted and having a nut bulged or screwed to the head, and a tubular member having the rod-shaped member inserted from below. A rod-shaped member is inserted from below, is in contact with the bottom of the tubular member, and at least one end is an elongated engagement member that engages with the bottom surface of the burr hole opening, and supports the engagement member from below. A curing cover for a manhole cover, comprising: a nut screwed from below the rod member. 6. A rigid plate that covers the entire upper surface of the manhole cover, and a fixture that fixes the rigid plate to the manhole cover by engaging the upper surface of the rigid plate and the bottom surface of the burr hole opening of the manhole cover. The fixing member is a rod-shaped member that has the rigid plate inserted vertically and has a nut that is bulged or screwed to the head, and the rod-shaped member is inserted from below to twist the head. A tubular member having a first engaging means, and a rod-shaped member inserted from below, abutting against the bottom of the tubular member, and at least one end of the elongated member engaging with the bottom surface of the burr hole opening. A curing cover for a manhole cover, comprising: an engaging member; and a nut screwed from below a rod-shaped member so as to support the engaging member from below. 7. A rigid plate that covers the entire upper surface of the manhole cover, and a fixture that fixes the rigid plate to the manhole cover by engaging the upper surface of the rigid plate and the bottom surface of the burr hole opening of the manhole cover. The fixing member is a rod-shaped member that has the rigid plate inserted vertically and has a nut that is bulged or screwed to the head, and the rod-shaped member is inserted from below to twist the head. A cylindrical member having a first engaging means, and a second engagement for inserting the rod-shaped member from below, abutting against the bottom of the cylindrical member, and engaging with the bottom of the cylindrical member to rotate integrally. An elongated engagement member having means, at least one end of which engages with the bottom surface of the burr hole opening; and a nut screwed from below the rod-shaped member so as to support the engagement member from below. A manho characterized by having Curing cover of the lid. 8. The curing cover for a manhole cover according to claim 5, wherein the rigid plate has a release agent or a release material between the rigid plate and the manhole cover. 9. A rod-shaped member having a bulged portion or a nut screwed to the head, a tubular member having the rod-shaped member inserted therein from below, and a tubular member having the rod-shaped member inserted from below. An elongated engaging member that abuts the bottom of the member and at least one end of which engages with the bottom surface of the burr hole opening of the manhole cover; and a screw from below the rod-shaped member so as to support the engaging member from below. A protective cover fixing device for a manhole lid, comprising: a nut that is attached. 10. A tubular member having a rod-shaped member having a nut that is bulged or screwed to the head portion, and a first engaging means for inserting the rod-shaped member from below and twisting the head portion. An elongated engagement member that is inserted through the rod-shaped member from below, contacts the bottom of the tubular member, and has at least one end engaged with the bottom surface of the burr hole opening of the manhole cover; And a nut screwed from below the rod-shaped member so as to support the member from below. 11. A tubular member having a rod-shaped member having a nut that is bulged or screwed to the head portion, and a first engaging means for inserting the rod-shaped member from below and twisting the head portion. And a second engaging means for inserting the rod-shaped member from below, abutting against the bottom of the tubular member and engaging with the bottom of the tubular member to rotate integrally, at least one end It has an elongated engagement member that engages with the bottom surface of the burr hole opening of the manhole cover, and a nut screwed from below the rod-shaped member so as to support the engagement member from below. Fixing fixture for manhole cover.