JPH05222739A - Cover level controller of manhole - Google Patents

Abstract

PURPOSE:To shorten a span of working time by performing the adjusting work of height and inclination of a road surface of a cover body. CONSTITUTION:Each inserting hole 17 of respective stacking blocks 15, 16 is inserted through four stud bolts in total embedded in an up end face 2a of a manhole 1, and these stacking blocks 15, 16 are stacked in pile as positioning them, while and, after a conical coil spring 5 is interposed between the stacked block 16, removed with the stud bolt 7 being situated in the uppermost stage, and each base 4a of cover frames 4, the base 4a of the cover frames 4 are attached to these stud bolts 7. In addition, with each nut 8 clamped tight, adjustments of the height and angle of a cover body 3 to be attached to an upper inner surface of the cover frame 4 are carried out. Accordingly, since the conical coil spring 5 is mounted on a position apart from a notch groove 19 on the stacking block 16, such nonconformities that a part of the notch groove 19 on the lower end of the conical coil spring 5 has become tilted because it is dropped in the notch groove 19 of the block 16 and the conical coil spring 5 has been mounted in an unstable state are thus solved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, in an underground structure such as a manhole laid under a road, sets the lid height to be set to the working opening which is the entrance to the ground of the manhole, the height of the road surface and the inclination of the road surface. The present invention relates to a manhole cover height adjustment device that facilitates adjustment work for adjusting to.

[0002]

2. Description of the Related Art Generally, underground pipes such as communication cable pipes, electric power cable pipes, gas pipes, and water pipes are laid under a road or the like. There is a manhole with a work opening that serves as a doorway for the. Further, an iron or concrete lid adapted to the height of the road surface is fitted to the work opening of the manhole.

By the way, when an underground structure such as a manhole is installed under an existing road, or when road paving is performed after the manhole is installed, the height of the manhole cover is not necessarily the height or slope of the road surface. Since it does not correspond to the above, the height of the lid and the inclination are adjusted again by raising the lid again.

As an example of such a method for raising the lid,
Japanese Unexamined Patent Publication No. 2-252524 discloses a manhole cover height adjusting device as shown in FIGS. 3 and 4. As shown in these drawings, a work port 2 serving as an entrance / exit to the ground is provided at the upper end of a concrete manhole 1 provided below a road 12 or the like. The work opening 2 is provided with an inner frame 9 and an outer frame 10 so as to surround the upper end surface 2a. The void formed by the inner frame 9 and the outer frame 10 is filled with concrete mortar 6.

At least four places on the upper end surface 2a of the work opening 2 are embedded with stud bolts 7. The conical coil spring 5 is attached to the stud bolt 7. Here, as shown in FIG. 5, for example, the conical coil spring 5 has a conical shape in which the coil diameter gradually decreases toward the upper part. Further, since the coil has a flat plate shape when it is bent to the maximum extent, a sufficient amount of bending of the conical coil spring 5 can be obtained.

As another example of the conical coil spring 5,
For example, as shown in FIG. 6, there is also one in which an abutting portion 5a having a diameter larger than the minimum diameter portion is provided on the upper portion thereof. In the conical coil spring 5 having such a configuration, the lid frame 4 described later is used.
Since the contact area of the contact portion 5a with respect to the back surface of the base 4a is expanded, the conical coil spring 5 is interposed in a relatively stable state. A circular recess 2b is formed in a portion of the upper end surface 2a in which the stud 7 is embedded. This recess 2
By attaching the lower end of the conical coil spring 5 to b,
The positioning of the conical coil spring 5 and the adjustment allowance are increased.

Around the conical coil spring 5, there is attached a bellows-like cover 13 made of synthetic resin or rubber and capable of expanding and contracting in the vertical direction. Then, the inner frame 9 and the outer frame 1
Since the concrete mortar 6 is prevented from entering the inside of the covering body 13 even if the void defined by 0 is filled with the concrete mortar 6, the conical coil spring 5 and the stud 7 are not solidified.

Therefore, even when the height of the lid frame 4 or the like needs to be adjusted next time, the existing conical coil spring 5 and the stud 7 can be reused. A base 4 a of the lid frame 4 elastically supported by a conical coil spring 5 is attached to the upper part of the stud 7. Then, the height and the inclination of the lid frame 4 are changed by tightening and tightening the nut 8, so that the height and the inclination of the lid body 3 to be attached to the upper inner surface of the lid frame 4 can be easily adjusted.

Next, a case where the work for raising the lid 3 is performed will be described. First, the road 12 around the work opening 2 is excavated into a circular shape or a rectangular shape, and the work opening 2 is exposed by forming the excavation hole 12a. Next, the conical coil spring 5 is inserted into the studs 7 that are planted on the upper end surface 2a of the lid frame receiving portion of the work opening 2, and then the base 4a of the lid frame 4 is attached to the upper side of the studs 7. After the lid frame 4 is attached, the nut 8 is screwed onto the top of the stud bolt 7, and the nut 8 is tightened so that the upper end surface of the lid frame 4 matches the height of the road 12.

At this time, the fastening with the nut 8 is performed by fastening the four studs 7 embedded in the upper end surface 2a at four locations. Therefore, the fastening amount at any location can be adjusted to adjust the lid. The height and the inclination angle of the frame 4 are arbitrarily adjusted. After completing the height adjustment of the lid frame 4,
The inner frame 9 and the outer frame 10 are installed inside and outside, respectively, and the concrete mortar 6 is filled in the gap between the inner frame 9 and the outer frame 10 and solidified. And finally,
The construction is completed by repairing the pavement of the excavation hole 12a excavated around the work opening 2.

As described above, since the height and the inclination angle of the lid body 3 can be arbitrarily adjusted by the tightening operation of the nut 8, it is not necessary to prepare various kinds of height adjusting members, and the construction time can be reduced. There is an advantage that it can be shortened. However, in such a manhole cover height adjusting device, from the surface height of the road 12 to the upper end surface 2 of the manhole 1.
Since it is necessary to position the manhole 1 in consideration of the head up to a, the work is complicated.

A stud bolt 7 is planted on the upper end surface 2a.
Is fixed by solidifying the concrete mortar 6 filled inside and outside the lid frame 4 after the height adjustment of the lid frame 4 is completed. Therefore, for example, in a cold region, an external force is applied to the studs 7 through the lid frame 4 or the like due to swelling of the ground surface due to freezing, so that the studs 7 are inclined, and when the frost is thawed, the lid is closed. Since the height and the inclination angle of the frame 4 change, there is a problem that the readjustment is required again.

Further, when the base 4a of the lid frame 4 is attached to the tilted stud 7, the height and the tilt angle of the lid 3 can be arbitrarily adjusted by tightening the nut 8. However, when the stud 7 is tilted, the lid 3
Since the strength against the weight added to becomes weak,
There is also a problem that the height and the inclination angle of the lid 3 are likely to change.

In order to eliminate such a problem, FIG.
Also, a manhole cover height adjusting device as shown in FIG. 8 has been developed. As shown in these figures, manhole 1
The large and small stacking blocks 15 and 16 are stacked on the upper end surface 2a of the. The positioning of the stacking blocks 15, 16 with respect to the manhole 1 is performed by positioning the stacking blocks 15, 1
It is carried out by inserting the stud bolt 7 through the bolt insertion hole 17 of No. 6.

A total of four notched grooves 18 and 19 are formed on the outer peripheral edge of each of the stacking blocks 15 and 16. Each notch groove 18, 19 has a lifting hook bolt 20,
21 is provided. Stacking the stacking blocks 15 and 16 on the manhole 1 is performed by using the hook bolts 2 for lifting.
This can be facilitated by hoisting each through 0 and 21 and sequentially stacking them.

In the manhole cover height adjusting device having such a configuration, by stacking an appropriate number of the respective stacking blocks 15 and 16 on the manhole 1, the height of the surface of the road 12 and the upper end surface of the manhole 1 are separated. The head can be easily adjusted. The stud bolts 7 are housed in the cutout grooves 19 and the hoisting hook bolts 21 of the stacking block 16 so as to allow the stud bolts 7 to escape to some extent against external force applied to the stud bolts 7 due to rising of the ground surface due to freezing. Can have For this reason, even if the freeze is thawed, the height and the inclination of the lid frame 4 do not change, so that it is not necessary to perform the adjustment frequently.

Further, even when an external force is applied to the stud bolt 7, the stud bolt 7 is supported by the notch groove 19 and the lifting hook bolt 21, and the base 4a of the lid frame 4 is supported.
Can be attached to the stud 7 in an appropriate state, so that it has the advantage that the strength against the weight applied to the lid 3 can be improved.

[0018]

However, in the conventional manhole cover height adjusting device described above, when the conical coil spring 5 is inserted into the stud 7 and a part of the lower end thereof is cut off the stacking block 16. It falls because it falls into the notch groove 19. Further, since a part of the lower end of the conical coil spring 5 contacts the surface of the stacking block 16, the conical coil spring 5 is in an unstable state with respect to the stacking block 16.

Therefore, when the nut 8 is tightened in such a state, a phenomenon occurs in which the conical coil spring 5 contracts in a tilted state. In this way, when the conical coil spring 5 contracts in a tilted state,
An appropriate biasing force cannot be obtained due to loss of biasing force of the conical coil spring 5 to the base 4a of the lid frame 4 or inclination of the direction of support force of the cone coil spring 5 to the base 4a of the lid frame 4. There was a problem that
Furthermore, when an appropriate biasing force by the conical coil spring 5 cannot be obtained, it is necessary to re-tighten the nut 8 again, resulting in a problem that the construction time is prolonged.

The present invention has been made in consideration of such a situation, and the adjustment work of the height and inclination of the road surface of the lid can be easily and surely performed, and the construction time can be greatly reduced. An object of the present invention is to provide a manhole cover height adjusting device that can be designed.

[0021]

In order to achieve the above object, the present invention provides a manhole cover height adjusting device for adjusting a manhole cover body laid under a road or the like to a road surface height. A lid frame for attaching the lid is attached to the plurality of studs embedded in the upper end surface of the manhole, and between the upper portion of the manhole and the lid frame at a position deviated from the stud. A conical coil spring that elastically supports the lid frame is interposed, and the height of the lid frame is adjusted by screwing a nut onto the stud.

[0022]

In the manhole cover height adjusting device of the present invention, a conical coil spring for elastically supporting the lid frame is interposed between the stud bolts embedded in the upper end surface of the manhole, and the stud bolts are attached to the stud bolts. After attaching the lid frame for attaching the lid,
The height of the lid frame was adjusted by screwing a nut on the stud. Therefore, for example, a part of the lower end portion of the conical coil spring 5 that has been generated conventionally is notched in the groove 1.
Since the inclination and instability caused by dropping into the cover 9 are prevented, the height adjustment of the lid 3 becomes easy and reliable.

[0023]

Embodiments of the present invention will be described below in detail with reference to the drawings. In the drawings described below, parts common to those in FIGS. 7 and 8 are designated by the same reference numerals, and duplicated description will be omitted. 1 and 2 show an embodiment of the manhole cover height adjusting device of the present invention, in which the upper end of the manhole 1 provided under the road 12 is used as an entrance to the ground. A mouth 2 is formed. On the upper end surface 2a of the manhole 1, a planting hole 2b into which a planting bolt 7 is planted.
Are formed. The lower end of the stud 7 is fixed to the stud 2b.

On the upper end surface 2a of the manhole 1, large and small stacking blocks 15 and 16 are stacked. The positioning of each stacking block 15, 16 with respect to the manhole 1 is performed by inserting the stud bolt 7 into the bolt insertion hole 17 of each stacking block 15, 16. A total of four notch grooves 18 and 19 are formed on the outer peripheral edge of each stack block 15 and 16. Notch grooves 18, 19
The hook bolts 20 and 21 for lifting are provided in the. And the stacking block 15 on the manhole 1,
The stacking of 16 is easily performed by hoisting each of the hoisting hook bolts 20 and 21 and sequentially stacking them.

The base 4a of the lid frame 4 is attached to the upper part of the stacking block 16 located at the uppermost stage. The conical coil spring 5 shown in FIG. 5 or 6 is interposed between the base 4a, which is the position where the studs 7 are removed, and the stacking block 16 located at the uppermost stage. The base 4a of the lid frame 4 is elastically supported. Then, since the pressing force against the biasing force of the conical coil spring 5 is changed by adjusting each tightening force at each tightening location of the nut 8, the height and inclination of the cover frame 4 are changed, and the inner surface of the upper part of the cover frame 4 is changed. It is possible to adjust the height and angle of the lid body 3 to be attached to the.

The operation of raising the lid body 3 by the manhole lid height adjusting device having such a structure is performed as follows. First, the road 12 around the work opening 2 is excavated in a circular shape or a rectangular shape to form a drill hole 12a to expose the work opening 2.
Next, the stacking blocks 15 and 16 are stacked on the manhole 1 to adjust the height with respect to the surface of the stack road 12. When these stacking blocks 15 and 16 are stacked, they are hoisted via the hoisting hook bolts 20 and 21 to be sequentially stacked. At this time, the positioning of the stacked blocks 15 and 16 with respect to the manhole 1 is performed by positioning the stacked blocks 15 and 1
It is carried out by inserting the stud bolt 7 through the bolt insertion hole 17 of No. 6.

After the stacking work of the stacking blocks 15 and 16 is completed, four conical coil springs 5 shown in FIG. 5 or 6 are placed on the stacking block 16 located at the uppermost stage. When mounting the conical coil spring 5, it is preferable to position the conical coil spring 5 at approximately the center between the studs 7 in terms of balance. After this, the lid frame 4 is attached to each stud 7.
Attach the base 4a.

After the mounting of the base 4a of the lid frame 4 is completed,
A nut 8 is screwed onto the top of the stud bolt 7, and the tightening force of the nut 8 is adjusted so that the upper end surface of the lid frame 4 matches the height of the road 12. At this time, the fastening by the nut 8 is performed by fastening the four studs 7 embedded in the upper end surface 2a at four locations, so that the fastening amount of any location can be adjusted to adjust the lid frame 4. The height and the inclination angle are arbitrarily adjusted. After the height adjustment of the lid frame 4 is completed, the pavement of the excavation hole 12a excavated around the work opening 2 is repaired. This completes the construction.

As described above, in this embodiment, the manhole 1
The total of four stud bolts 7 embedded in the upper end surface 2a of the stack are inserted into the bolt insertion holes 17 of the stack blocks 15 and 16 to stack the stack blocks 15 and 16 while positioning them, and the stack blocks are positioned at the top. The conical coil spring 5 is interposed between the stacking block 16 from which the stud bolt 7 is removed and the base 4a of the lid frame 4. Next, these studs 7
The base 4a of the lid frame 4 is attached to the above, and the nut 8 is further tightened to adjust the height and angle of the lid 3 to be attached to the upper inner surface of the lid frame 4.

Therefore, since the conical coil spring 5 is placed on the stacking block 16 at a position separated from the notch groove 19, a part of the lower end of the conical coil spring 5 which has been a problem in the past is cut by the stacking block 16. It is possible to solve the problem that the cone coil spring 5 is placed in an unstable state because it is tilted because it falls into the notch groove 19.

As a result, since the conical coil spring 5 can be contracted while maintaining a fixed posture, the base 4 of the lid frame 4
It is possible to obtain an appropriate biasing force of the conical coil spring 5 without causing a loss in the biasing force of the conical coil spring 5 to a. As a result, the height and inclination angle of the lid 3 can be adjusted arbitrarily and reliably only by tightening the nut 8, so that the construction time can be greatly shortened. In the present embodiment, the case where four conical coil springs 5 are interposed on the lower surface side of the base 4a of the lid frame 4 has been described, but not limited to this example, three or five.
You may make it interpose more than one piece.

Further, in this embodiment, the stacking block 16
The case where the conical coil spring 5 is simply placed at a position deviating from the upper cutout groove 19 has been described, but the present invention is not limited to this example, and a concave portion is provided at a position on the stacking block 16 where the conical coil spring 5 is to be placed. The conical coil spring 5 may be positioned.

[0033]

As described above, according to the manhole cover height adjusting device of the present invention, a conical weight for elastically supporting the cover frame between the respective studs embedded in the upper end surface of the manhole. After the coil spring was interposed and the lid frame for attaching the lid body was attached to each stud, the height of the lid frame was adjusted by screwing a nut on the stud. Therefore, for example, the inclination and instability caused by dropping a part of the lower end portion of the conical coil spring 5 into the notch groove 19 which is conventionally generated are prevented, so that the height adjustment of the lid body 3 is easy and reliable. It is possible to shorten the construction time.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a manhole cover height adjusting device of the present invention.

FIG. 2 is a plan view showing a main part of FIG.

FIG. 3 is a cross-sectional view showing an example of a conventional manhole cover height adjusting device.

FIG. 4 is a plan view showing a main part of FIG.

FIG. 5 is a perspective view showing an example of a conical coil inserted and attached to the stud of FIG.

FIG. 6 is a perspective view showing another example of a conical coil inserted into and attached to the stud of FIG.

FIG. 7 is a perspective view showing another example of a conventional manhole cover height adjusting device.

8 is a cross-sectional view showing the manhole cover height adjusting device of FIG. 7. FIG.

[Explanation of symbols]

 1 Manhole 2 Working Port 2a Upper End Surface 3 Lid Body 4 Lid Frame 4a Base 5 Conical Coil Spring 6 Concrete Mortar 7 Implant Bolt 8 Nut 9 Inner Frame 10 Outer Frame 15,16 Stacking Block 17 Bolt Insertion Hole 18,19 Notch Groove 20 , 21 Lifting hook bolt

Claims (1)

[Claims] 1. A manhole cover height adjusting device for adjusting a manhole cover body laid under a road or the like to a road surface height, wherein the plurality of studs embedded in the upper end surface of the manhole are A lid frame for attaching the lid is attached, and a cone coil spring that elastically supports the lid frame is interposed between the upper portion of the manhole and the lid frame at a position separated from the stud. A height adjusting device for a manhole, wherein the height of the lid frame is adjusted by screwing a nut onto the stud.