JP3136514B2 - Level adjustment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a level adjusting device, and more particularly, to a level adjusting means which can be screwed with a fixing bolt to adjust a level, and which is screwed to a fixing bolt to be above the level adjusting means. And a fixing means provided.

[0002]

2. Description of the Related Art In the field of civil engineering and construction, there is a case where an installed object is once installed and then the level is adjusted again, or the temporary object or the like is withdrawn after the construction is completed. For example, a lid for an underground structure such as a manhole has a lid body and a receiving frame for supporting the lid in order to openably close an opening through the ground and the inside of the underground structure. Is provided. When installing this underground structure lid on a road or the like, it is necessary to adjust the installation level so that the road surface and the upper end surface of the receiving frame coincide with each other, and a level adjusting device is provided. This level adjustment device
Various configurations have been adopted.
As disclosed in Japanese Patent No. 202, there is a configuration in which an adjusting body is interposed between an underground structure (manhole block) and a receiving frame (lid receiving frame). This enables level adjustment by screwing an adjusting body to a bolt implanted in the upper part of the underground structure, and the adjusting body is composed of an upper adjusting body and a lower adjusting body, and the upper adjusting body is By making it freely tiltable with respect to the lower adjustment body, it is possible to cope with the inclination of the road surface. On the other hand, in the above-mentioned lid for underground structures, it may be necessary to perform level adjustment even after installation. For example, in the case of a temporary restoration (temporary pavement) after laying a sewer pipe, and a main restoration (main pavement), or in the case of performing an overlay by maintaining a road after the restoration, the upper end surface of the receiving frame coincides with the pavement surface. Level adjustment is performed again.

[0003]

However, in the prior art, in the prior art, the adjusting body constituting the level adjusting device is provided with a filler such as mortar filled between the underground structure and the receiving frame when the receiving frame is installed. Since it comes into direct contact and is buried, when raising again from this state, a newly prepared adjustment body is screwed into the bolt, and therefore, the thickness of the adjustment body ( The thickness when the upper adjustment body and the lower adjustment body are overlapped) is the minimum adjustment height. Therefore, when a fine raising operation smaller than the thickness of the adjusting body is required, the raising operation must be performed after removing the strong filler, which is very poor in workability. In order to reduce the minimum adjustment height, it is conceivable to reduce the thickness of the adjustment body. However, the strength of the adjustment body is reduced, and the adjustment body becomes impractical. on the other hand,
If the height of the raised bolt is high and the existing bolts planted above the underground structure are not long enough, it is necessary to replace the bolts with long ones. However, in the conventional technology,
As in the case of the above-mentioned adjustment body, the existing bolt is in direct contact with the filler and is buried, so the bolt cannot be removed unless the filler is broken.
Moreover, since the filler is fixed to the thread of the bolt, it is extremely difficult to remove the filler, and it is also difficult to lower the bulk by excavating the filler. After the restoration, burying materials such as asphalt used for backfilling underground structures and receiving frames, and filler materials such as mortar filled between underground structures and receiving frames are excavated. Even if it is taken out, it cannot be reused because the filler and the buried material are attached. The present invention has been proposed in view of the above, and facilitates re-raising and lowering work after installation, and enables reuse of various members constituting the level adjusting means and the like, and in the case of raising work,
It is an object of the present invention to provide a level adjusting device capable of adjusting a level at an arbitrary height without breaking down a used filler.

[0004]

In order to solve the above-mentioned problems, according to the present invention, there is provided a level adjusting means capable of adjusting a level by being screwed with a fixing bolt, and a level adjusting means being screwed to the fixing bolt and being above the level adjusting means. And a protection block that can cover the level adjustment means ,
The protection block is made of an elastic material . The protection block prevents a filler such as mortar to be filled from coming into direct contact with the level adjusting means, and allows the level adjusting means to move up and down when the level is adjusted again. In addition, it is made of elastic material
So that even when the installation is tilted,
As well as absorbing shock and vibration
It becomes possible.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, it is preferable to provide a protective cap capable of covering the fixing means. This can prevent direct contact between the embedding material and the fixing means when backfilling the surroundings, so that it is easier to adjust the level again and to attach and detach the fixing means when removing. Further, it is preferable to provide a protective sleeve capable of covering the fixing bolt. This can prevent the filler and the fixing bolt from directly contacting each other, thereby facilitating the lowering work by excavating the filler. Further, in the present invention, it is preferable that a tapered portion whose diameter is reduced downward is formed on the outer peripheral side surface of the protection block. By forming this tapered part,
Even if the raised height is finely adjusted to be equal to or less than the thickness of the protection block, the filler can sufficiently spread to the lower surface side of the protection block.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 7 show a first embodiment in which the level adjusting device of the present invention is used for installing a lid 1 for an underground structure.

The lid 1 for an underground structure in this embodiment is
The level adjusting device comprises a lid main body 11 and a receiving frame 2 for fitting and supporting the lid main body 11, and the level adjusting device is a level adjusting block 3 as a level adjusting means for supporting the receiving frame 2 so that the level can be adjusted.
1 and a fixing member 32 as fixing means for fastening the receiving frame 2
And a protection block 52 that can cover the level adjustment block 31 described above.

As shown in a plan view of FIG. 1, the receiving frame 2 has the same configuration as that of the conventional frame, and a flange 22 having a plurality of oblong bolt holes 21 is formed at the lower end. ing. As shown in FIG. 2, a support portion 24 for fitting and supporting the lid main body 11 is formed on the inner peripheral surface of the receiving frame 2, and a ridge 23 protruding upward is provided on the peripheral edge of the bolt hole 21. Are formed.

On the upper side of the side block 61, a fixing bolt 1 is provided.
A sleeve nut 13 for detachably implanting 2 is embedded, and a fixing bolt 12 of a total screw is screwed to the sleeve nut 13. The fixing bolt 12
A level adjusting block 31 serving as a level adjusting means is screwed to support the flange 22 of the receiving frame 2 from below,
By screwing this, the installation level of the receiving frame 2 is adjusted.

In this embodiment, since a concrete side block 61 is assumed, the fixing bolt 12 is screwed through a sleeve nut 13 so as to be detachably planted. When a side lump or the like is applied, a screw hole may be formed in the upper surface, and the fixing bolt 12 may be directly implanted and detachable.

As shown in FIG. 4, the level adjusting block 31 is formed by integrating a nut 31b into a synthetic resin base 31a by insert molding, and forms a convex curved surface 31c having the upper end of the base 31a as an apex. Further, a tool hook 31d is formed at the lower end.

As shown in FIG. 3, a fixing block 32 is attached to the fixing bolt 12 and a fixing nut 34 is screwed to the fixing member 32 as shown in FIG.
The mounting frame 5 is configured to tighten the receiving frame 2 from above.

The fixing block 33 is made of a synthetic resin.
As shown in FIG. 5, an insertion hole 33a for inserting the fixing bolt 12 is formed at the center, and the fixing nut 3 is provided at an upper end portion.
4 is integrated by insert molding. The lower surface of the fixed block 33 is formed in a convex curved shape with the position of the insertion hole 33a at the lowermost portion so as to abut on the upper surface of the flange 22 of the receiving frame 2. Projection 33 engaging with inner peripheral wall
c is projected. Further, on the outer peripheral side surface, a number of grooves 33d are formed in the tangential direction. As shown in FIG. 3, the outer diameter of the fixing block 33 is wider than the bolt hole 21 of the receiving frame 2, and the protrusion 33c is
It should be large enough to fit inside.

On the other hand, the anti-rotation cap 35 is also made of a synthetic resin. As shown in FIG. 6, a groove 35a meshing with the groove 33d of the fixed block 33 is formed on the lower inner peripheral side surface. Four engagement claws 35b from the bottom to the bottom
Has been extended. A hole 35c concentric with the anti-rotation cap 35 is formed above the cap 35, and a restraining band 35d in which the fixing nut 34 is fitted into an edge of the hole 35c is raised all around.

According to the above-described level adjusting means, that is, the level adjusting block 31 screwed to the fixing bolt 12, the height of the level adjusting block 31 can be arbitrarily changed and fixed. Can be rotated while being placed on the level adjustment block 31, the construction can be performed while the receiving frame 2 is adjusted to the level of the road surface, and the work load and the work time can be reduced. Further, it is possible to cope with the inclination of the road surface.

As shown in FIG. 7, the protection block 52 is opened at the center in the thickness direction to open the level adjustment block 3.
1 is a donut shape having a protective storage part 52a capable of storing the same. The upper end side of the protection storage portion 52a is reduced in diameter corresponding to the shape of the level adjustment block 31. When the receiving frame 2 is installed, the protective block 52 has good releasability from mortar or the like as a filler filled between the upper part of the side lump 61 constituting the underground structure and the receiving frame 2. It is composed of materials. For example, it is preferable to use an independently foamed rubber sponge having independent voids. Further, by using such a resilient material, when the receiving frame 2 is inclined in accordance with the inclination of the road surface, the receiving frame 2 can be brought into close contact with the lower surface of the receiving frame 2. It can also absorb shocks and vibrations caused by traffic and the like. Note that the shape of the protection block 52 may be a shape having a notch so that the level adjustment block 31 can be mounted from the lateral direction.

Further, as shown in FIG. 2, the fixing member 32 is covered by a protective cap 51 together with the fixing bolt 12. As shown in FIG. 7, the protective cap 51 has a peripheral wall 5 having a protective space 51a formed therein.
1b and a top plate portion 51c. A pair of engaging portions 51d and 51e are provided at the lower end of the peripheral wall portion 51b in correspondence with the ridges 23 formed on the peripheral edge of the bolt hole 21. It is preferable that the protective cap 51 is formed of a rigid body such as cast iron or steel so that the protective cap 51 is not damaged by the impact force of a rolling machine during paving.

The level adjustment block 31 and the side block 61
The fixing bolt 12 located between the
Covered by As shown in FIG. 7, the protective sleeve 53 has a bellows shape in which conical slopes 53a are alternately continued. As a material, for example, a synthetic resin such as polypropylene is suitable. In addition, this protection sleeve 53
May be a cylindrical sponge-like elastic body. The point is that it is only necessary to cover the periphery of the fixing bolt 12 and to closely contact the upper surface of the side block 61 and the lower surface of the receiving frame 2.

The installation of the underground structure lid 1 using the level adjusting device according to the present embodiment is performed according to the following procedure. The fixing bolt 12 is screwed to the sleeve nut 13 provided on the upper side of the side lump 61 which is an underground structure. Although not shown, when the height difference between the upper surface of the side lump 61 and the ground surface (GL) is large and the mortar filling amount is large, a sleeve is required to reduce the height difference. Nut 1
Another ring-shaped member provided with 3 may be installed on the upper surface of the side lump 61. Protection sleeve 53 cut to almost the same length as the adjustment height
Into the fixing bolt 12. In addition, when it is anticipated that the raising work of the receiving frame 2 at the time of the permanent restoration of the road from the state of the temporary restoration can be performed within the range of the length of the existing fixing bolts 12, it is necessary to use the protective sleeve 53. There is no. The level adjustment block 31 is screwed to the fixing bolt 12. The fixing bolt 12 is inserted into the bolt hole 21 of the receiving frame 2, and the receiving frame 2 is placed on the level adjustment block 31. Then, the upper end surface of the receiving frame 2 is adjusted to the ground surface (GL) while turning the level adjustment block 31. The receiving frame 2 is once removed, and the protection block 52 is inserted from the upper end of the fixing bolt 12 to cover the level adjustment block 31. It is not necessary to temporarily remove the receiving frame 2 when mounting from the lateral direction using the protection block provided with the cut. The fixing bolt 12 is inserted into the bolt hole 21 of the receiving frame 2 again, and the receiving frame 2 is placed on the level adjustment block 31 covered with the protection block 52. At this time, the level adjustment block 31 is rotated so that the installation level does not change. The fixing block 33 is inserted from the upper end of the fixing bolt 12, and the projection 33 c is fitted into the bolt hole 21. Further, the fixing block 33 is screwed onto the fixing bolt 12, and the fixing block 33 is pressed against the flange 22 via a washer 33 b integrated with the fixing block 33 to tighten the receiving frame 2. After the fixing nut 34 is screwed onto the fixing bolt 12 and the tightening force is adjusted, the restraining band 35d of the rotation preventing cap 35 is fitted to the fixing nut 34, and the fixing block 33 has the respective groove 33d. The groove 35a is engaged with and fitted to the groove 35a, and the engaging claw 35b is engaged with the lower end of the fixed block 33 to be integrated. The protective cap 51 is attached so as to cover the fixing block 33, the fixing nut 34, the rotation preventing cap 35, and the head of the fixing bolt 12. Next, the receiving frame 2 and the side lump 61
Fill it with mortar and seal the entire circumference. In this embodiment, the periphery of the side lump 61 is buried with the crushed stone 42 and the periphery of the receiving frame 2 is paved with the base asphalt 43 and the surface asphalt 44. However, if the road is temporarily restored (temporarily paved) using a room temperature mixture material having a low solidification property after the receiving frame 2 is installed, when the road is temporarily restored, it is attached to the fixing bolt 12. Since the work of removing the buried material is relatively easy, in such a case, it is not always necessary to use the protective cap 51.

On the other hand, the re-raising after installation is
This is performed as follows. The surface asphalt 44, the base asphalt 43, and the crushed stone 42 are excavated to the lower surface of the level adjusting means, that is, the lower surface of the level adjusting block 31 in this embodiment. The protective cap 51 is removed, and the rotation preventing cap 35, the fixing nut 34, and the fixing block 33 are removed. The lower surface of the receiving frame 2 is hit with a rag, and is hit with a hammer to separate the receiving frame 2 from the mortar layer 41, and the receiving frame 2 is lifted directly above and removed. A double nut is hung on the head of the fixing bolt 12 and turned with a spanner to remove the fixing bolt 12 from the sleeve nut 13 and remove the protection block 52 and the level adjustment block 31. Attach a new fixing bolt 12 according to the raised height. A protective sleeve 53 corresponding to the height of the raised portion is inserted into the fixing bolt 12. After the level adjustment block 31 is attached, the receiving frame 2 is temporarily placed, the height is adjusted by turning the level adjusting block 31, and once the receiving frame 2 is removed, the protection block 52 is covered so that the level adjusting block 31 does not rotate. . After mounting the receiving frame 2 again, the fixing block 33, the fixing nut 34, and the rotation preventing cap 35 are attached, and the protective cap 51 is attached. Then, a new mortar is filled between the receiving frame 2 and the side lump 61. If necessary, the periphery of the side lump 61 is buried with the crushed stone 42, and the periphery of the receiving frame 2 is re-paved with the base asphalt 43 and the surface asphalt 44.

According to the present embodiment, the receiving frame 2 can be raised without breaking the existing mortar layer 41 as described above, and the raised height can be set arbitrarily regardless of the thickness of the level adjusting means. It is possible and construction is easy. In addition, it is possible to reuse the members constituting the level adjusting means and the fixing means.

FIG. 8 shows a second embodiment of the level adjusting device according to the present invention. In this embodiment, a protection block 52 that covers the entire area from the level adjustment block 31 to the fixing bolt 12 is used as a protective sleeve 53 for protecting the fixing bolt 12. A notch (not shown) is provided on the side of the protection block 52 so that the protection block 52 can be mounted from the side. In this embodiment, as a simple level adjusting means, a level adjusting nut 36 having a curved upper end surface is used.
Further, as the fixing means, a fixing nut 37 having a curved lower end surface is used as a simpler means.
Even with such a simple level adjusting means and fixing means, it is possible to sufficiently adjust the level of the receiving frame 2 and tighten it, and to cope with the inclination of the road surface. on the other hand,
Also in this embodiment, the upper ends of the fixing nut 37 and the fixing bolt 12 are covered with the protective cap 51.

Also in this embodiment, the level adjusting nut 36 serving as level adjusting means and the middle portion of the fixing bolt 12 are protected from the mortar layer 41 by the protective block 52 and the fixing nut 37 is protected by the protective cap 51.
Further, since the upper end portion of the fixing bolt 12 is protected, various members constituting the level adjusting means and the fixing means can be reused, and the re-raising work is easy without breaking down the mortar layer 41.

FIG. 9 shows a third embodiment of the level adjusting device according to the present invention. In this embodiment, a pair of upper and lower nuts 38a, 38b is used as a level adjusting means and a fixing means.
And the protection block 52 protects the lower nut 38a. Also,
The fixing bolt 12 is directly embedded in the upper part of the side lump 61. The upper nut 38b and the fixing bolt 12
Is covered with a protective cap 51.

As described above, even in the most basic configuration,
Raising the receiving frame 2 can be performed without breaking the mortar layer 41. In the third embodiment, since the fixing bolts 12 cannot be replaced, it is not possible to perform a significant raising work exceeding the length of the fixing bolts 12, but it is possible to perform the raising work within the range of the planted fixing bolts 12. In addition, the nuts 38a and 38b can be reused.

FIGS. 10 to 12 show a more preferred embodiment of the present invention. That is, in the fourth embodiment,
This is an improvement of the first embodiment shown in FIGS. 1 to 7 in the case where the level adjusting means is used for installing the lid 1 for an underground structure. A tapered portion 71 is provided on the outer peripheral side surface of the protection block 52. ing.

In the first embodiment as well, when the raised height is equal to or greater than the thickness of the protection block 52, a gap is provided between the upper surface of the existing mortar layer 41 and the lower surface of the raised protection block 52. Therefore, there is no problem that the new mortar to be filled after the raising is sufficiently extended to the lower surface side of the protection block 52. However, in the case of performing a minute raising whose height is not more than the thickness of the protection block 52,
Since the lower portion of the raised protection block 52 is fitted into the residual hole (corresponding to the residual hole 41a in FIG. 12) remaining in the existing mortar layer 41 and the residual hole is closed, the mortar does not reach the residual hole. There was fear.

Therefore, in the fourth embodiment, FIG.
As shown in FIG. 7, a plurality of groove-shaped tapered portions 71 whose diameter is reduced downward are provided on the outer peripheral side surface of the protection block 52. A notch 72 is provided below the outer peripheral side face sandwiched between the tapered portions 71.

With this configuration, as shown in FIG. 12, even when the raised height H is less than the thickness D of the protection block 52, the residual holes 41a remaining in the existing mortar layer 41 are formed. A gap P is generated between the protection block 52 and the tapered portion 71 of the protection block 52. Therefore, the new mortar 41 ′ filled from the filling port 22 a opened in the receiving frame 2 passes through the gap P and the residual hole 41 on the lower surface side of the protection block 52.
a. In addition, in the case of FIG. 12, the mortar 41 'flows from the notch 72 of the protection block 52, so that the mortar 41' is quickly moved to the protection block 5.
2 to the bottom side.

Here, in FIG. 12, reference numeral 8 in FIG.
Reference numerals 1 and 82 denote an outer mold frame and an inner mold frame for sealing the outer peripheral portion and the inner peripheral portion of the portion to be filled with the mortar 41 '. The outer mold frame 81 and the inner mold frame 82 are removed after the mortar 41 'has solidified.

FIGS. 8 and 9 and FIGS. 10 to 1
In the second, third, and fourth embodiments shown in FIG. 2, members having the same functions as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

As described above, the case where the present invention is used for installation of a lid for an underground structure has been described with reference to the embodiment in the drawings. However, the present invention is not limited to the above-described embodiment, and is described in the claims. As long as the configuration is not changed, it can be appropriately implemented. For example, in the fourth embodiment described above, a plurality of groove-shaped tapered portions 71 are provided on the outer peripheral side surface of the protection block 52, but the tapered portion 71 may be provided over the entire outer peripheral side surface. In this case, the mortar 41 ′ flows from the entire circumference of the protection block 52, so that the mortar 41 ′ can spread more quickly to the lower surface side of the protection block 52. Further, the taper portion 71 can be formed in the protection block 52 in the second and third embodiments, similarly to the fourth embodiment. Also, it is a matter of course that the installation object installed using the present invention is not limited to the lid for the underground structure.

[0033]

In summary, the level adjusting device of the present invention comprises a level adjusting means capable of adjusting the level by screwing with a fixing bolt, and a fixing means screwed on the fixing bolt and provided above the level adjusting means. And a protection block capable of covering the level adjusting means, the following effects can be obtained. Since the filler used does not directly come into contact with the members constituting the level adjusting means, these members can be easily reused. Raising construction is possible without breaking down the filler used. Height restrictions during lifting work have been removed. That is, it is possible to finely raise the height less than the thickness of the level adjusting means without breaking the filler. In the case where the protection cap capable of covering the fixing means is provided, the head of the fixing bolt is not damaged and the screw thread is not buried, so that the fixing nut and the like can be easily attached and detached, and the work efficiency is improved. In the case where the configuration is provided with the protective sleeve capable of covering the fixing bolt, the filler and the fixing bolt are prevented from directly contacting with each other, so that the filling material is easily excavated and lowered. Further, when the fixing bolt is replaceably provided, it is possible to greatly increase the length of the existing fixing bolt by replacing it with a longer fixing bolt. And since the protective cap, protective block and protective sleeve not only prevent the adhesion of the filler and the buried material, they also have the role of absorbing shock and vibration.
Cracking of the filler can be prevented. Furthermore, in the case where a tapered portion that is reduced in diameter is formed on the outer peripheral side surface of the protection block, even if the height of the protection block is minute or less than the thickness of the protection block, the filler is sufficiently filled up to the lower surface side of the protection block. It can be spread. Moreover, the protection
The lock is made of elastic material
Therefore, even if the installation object is tilted,
And can absorb shocks and vibrations
Becomes

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view when the present invention is used for a lid for an underground structure.

FIG. 2 is a longitudinal sectional view when the present invention is used for a lid for an underground structure.

FIG. 3 is a side view of a cover for an underground structure according to the present invention, in which a part of a main part is cut away.

4A and 4B show a level adjustment block, in which FIG. 4A is a partially cut-away side view, and FIG. 4B is a plan view.

5A and 5B show a fixed block, in which FIG. 5A is a side view with a part cut away, and FIG. 5B is a bottom view with a part enlarged.

FIG. 6 shows a rotation preventing cap, (A) is a plan view,
(B) is a side view with a part removed, and (C) is a bottom view with a part enlarged.

FIG. 7 is a perspective view of a protection cap, a protection block, a protection sleeve, and a level adjustment block.

FIG. 8 shows a second case where the present invention is used for a lid for an underground structure.
It is a longitudinal cross-sectional view which shows Example.

FIG. 9 shows a third case where the present invention is used for a lid for an underground structure.
It is a longitudinal cross-sectional view which shows Example.

FIG. 10 is a perspective view of a protective cap, a protective block, a protective sleeve, and a level adjustment block of a fourth embodiment when the present invention is used for a lid for an underground structure.

FIG. 11 is a longitudinal sectional view showing a fourth embodiment when the present invention is used for a lid for an underground structure.

FIG. 12 is a schematic longitudinal sectional view for explaining a filling state of a filler in a fourth embodiment when the present invention is used for a lid for an underground structure.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 underground structure lid 2 receiving frame 11 lid body 12 fixing bolt 31 level adjusting block (level adjusting means) 32 fixing member (fixing means) 36 level adjusting nut (level adjusting means) 37 fixing nut (fixing means) 38a nut (level) Adjusting means) 38b Nut (fixing means) 51 Protective cap 52 Protective block 53 Protective sleeve 71 Tapered part 72 Notch

Claims (4)

(57) [Claims] 1. A level adjusting means which can be screwed with a fixing bolt to adjust a level, a fixing means which is screwed to a fixing bolt and is provided above the level adjusting means, and the level adjusting means can be covered. and a protective block, the coercive
A level adjusting device, wherein the protective block is made of a resilient material . 2. The level adjusting device according to claim 1, further comprising a protective cap capable of covering the fixing means. 3. The level adjusting device according to claim 1, further comprising a protective sleeve capable of covering a fixing bolt located below the level adjusting means. 4. The level adjusting device according to claim 1, wherein a taper portion is formed on an outer peripheral side surface of the protection block so as to decrease its diameter downward.