JP2502400Y2 - Level adjustment device for receiving frames for underground structures - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is for an underground structure in which the installation level can be easily adjusted when fixing the receiving frame of the lid for the underground structure on the side block. The present invention relates to a level adjusting device for a receiving frame.

[Prior Art] Conventionally, in an underground structure such as a manhole, in order to openably and closably close an opening passing through the inside and the ground,
As shown in FIG. 8, the lid body 51 and the receiving frame 1 for supporting the lid body 51.
A lid receiving frame for an underground structure consisting of and is installed on the upper end of the side block 50. The receiving frame 1 has anchor bolts 52 planted at the upper ends of the side blocks 50 and nuts screwed to the anchor blocks 52 so that the receiving frame 1 does not rattle due to an impact caused by the passage of a vehicle even after installation.
Fixed by 53.

When fixing the receiving frame 1, it is necessary to adjust the installation level so that the road surface and the upper end surface of the receiving frame 1 coincide with each other. Various methods are adopted for this level adjustment,
For example, as described in Japanese Patent Publication No. 60-53139, there is a method of stacking a plurality of plate-shaped washers between the upper surface of the side block and the lower surface of the flange of the receiving frame.

[Problems to be solved by the device]

With this method, the installation level of the receiving frame can be raised or lowered by changing the number of washer stacks.Therefore, the level adjustment for the road surface can be performed by selecting the number of washer stacks according to the site. Is possible.

However, according to the above method, the level can be changed only discontinuously in accordance with the thickness of the washer,
The level of the road surface cannot be finely adjusted. Therefore, some kinds of washers with different thicknesses can be prepared, but the work is inevitably complicated. Also, since it is a work procedure to lay a washer under the receiving frame, it is necessary to repeatedly insert and pull out the washer after lifting the receiving frame when adjusting the level to the road surface at the site. For this reason, the work load of raising and lowering the receiving frame becomes large, and there are some aspects that are not suitable for installation work of a large receiving frame.

Further, in the above method, only the nut is screwed into the anchor bolt to fix the receiving frame,
The nut may loosen due to vibrations when the vehicle passes, and the receiving frame may rattle. Furthermore, when the number of washers is changed for each location so that the upper surface of the lid body matches the slope of the road surface, and the receiving frame is inclined, the upper surface of the washer and the lower surface of the flange of the receiving frame, and the nut are If it is tightened too tightly, there is a problem that the receiving frame is deformed and the lid body cannot be fitted, or the lid body is loose.

Therefore, the present invention has a direct purpose to provide a level adjusting device for the receiving frame that can set the installation level of the receiving frame minutely and prevent loosening of the nut. However, it is an additional object to provide a level adjusting device for the receiving frame that can securely fix the nut without deforming the receiving frame and without causing looseness.

[Means for solving the problem]

In order to solve the above-mentioned problems, the level adjusting device for a receiving frame for an underground structure of the present invention includes a receiving frame in which a bolt hole for inserting a fixing bolt implanted in a side block of an underground structure is opened in its flange. A level adjusting block that is screwed into a fixing bolt and supported from below, a fixing block that is inserted through the fixing bolt and has a protrusion fitted into the bolt hole from above, and a nut that is screwed into the fixing bolt. And a rotation-preventing cap that is non-rotatably and detachably fitted to the fixed block.

In such a structure, at least the upper end portion of the level adjustment block that supports the receiving frame can be formed of synthetic resin.

Further, the fixed block may also be one in which at least the lowermost portion of the insertion hole through which the fixing bolt is inserted is made of synthetic resin.

Further, the level adjustment block is formed in an upward convex curved surface shape with the upper end portion supporting the receiving frame as the uppermost portion, and the fixed block is formed in a downward convex curved surface shape with the insertion hole for inserting the fixing bolt as the lowermost portion. It can also be made.

[Action]

The level adjusting block rotatably screwed to the fixing bolt moves up and down along the axis of the fixing bolt according to the rotation direction thereof. For this reason, the receiving frame placed on the level adjustment block also moves with the level adjustment block, so the installation level is set at an arbitrary height, and the fixing bolt protruding above the flange of the receiving frame is inserted into the bolt hole. The receiving frame is fixed by the fixed block that is fitted together, the nut that is screwed into the fixing bolt, and the periphery of the nut, and the rotation prevention cap that is fitted in the fixed block. At this time, since the level adjustment block has an amount of vertical movement proportional to the rotation of the screw, if the amount of rotation is small, the amount of vertical movement is small, and fine level adjustment is possible when the receiving frame is installed.

Also, if at least one of the level adjustment block and the fixed block is made of synthetic resin, the receiving frame can be elastically clamped, a cushioning function against a strong impact load can be obtained, protection of the receiving frame and loosening of the nut etc. It also prevents

Furthermore, the height of each level adjustment block and fixed block can be changed in order to install the receiving frame on the inclined surface by forming the outer shape of the convex curved surface with the upper end of the level adjustment block and the lower end of the fixed block as vertices. Only the holding point moves to this curved surface portion, and stable support is maintained.

〔Example〕

Hereinafter, the features of the present invention will be specifically described with reference to the embodiments shown in the drawings.

FIG. 1 is a vertical cross-sectional view of an essential part showing an embodiment of the level adjusting device of the present invention, FIG. 2 is a plan view of the essential part, and FIG. 3 is a state in which the installation level of the receiving frame is separated from the upper end of the side block. It is a longitudinal cross-sectional view of the main part when it is set.

As shown in the plan view of FIG. 7, the receiving frame 1 supported by the level adjusting device has a structure exactly the same as the conventional one, and the flange 1a having a plurality of oval bolt holes 1b is provided. It is formed at the lower end.

On the other hand, a sleeve nut 2 is planted on the upper end of the side block 50 as shown in FIG. 1, and a fixing bolt 3 of a total screw is screwed onto the sleeve nut 2. A level adjusting block 4 is screwed onto the fixing bolt 3 to support the flange 1a, and thereby the installation level of the receiving frame 1 is set. As shown in FIG. 4, the level adjusting block 4 is a synthetic resin base 4a into which a nut 4b is integrated by insert molding. The base 4a has a convex curved surface 4c with the upper end as the apex, and the lower end. Has a tool rest 4d.

After mounting the receiving frame 1 with the fixing bolt 3 screwed with the level adjusting block 4 inserted into the bolt hole 1b,
A fixed block 6 is attached, the details of which are shown in the figure. Then, after the nut 5 is screwed onto the fixing bolt 3, the rotation preventing cap 7 whose details are shown in FIG. 6 is attached.

The fixing block 6 is made of synthetic resin, has an insertion hole 6b at the center for inserting the fixing bolt 3, and a washer 8 for receiving the nut 5 is integrated at the upper end thereof by insert molding. The lower surface of the fixed block 6 has an insertion hole.
It is formed in a convex curved shape with the position of 6b being the lowermost part so as to abut the upper surface of the flange 1a of the receiving frame 1, and a projection 6a that engages with the inner peripheral wall of the bolt hole 1b is provided at one end in the radial direction. .
Further, a large number of grooved grooves 6c are formed in the outer peripheral side surface in the axial direction. As shown in FIG. 2, the fixing block 6 has an outer shape wider than the bolt hole 1b of the receiving frame 1, and the projection 6a is of course sized to fit in the bolt hole 1b.

On the other hand, the anti-rotation cap 7 is also made of a synthetic resin, and as shown in FIG. 1, a groove 7a that meshes with the groove 6c of the fixed block 6 is formed on the lower inner peripheral side surface, and further from the peripheral side wall thereof. Four engaging claws 7b are extended downward. Also,
A hole 7c concentric with the rotation prevention cap 7 is opened above it,
A restraint band 7d, into which the nut 5 is fitted, is raised all around the edge of the hole 7c.

 Fixing of the receiving frame 1 to the side block 50 is performed as follows.

The level adjusting block 4 is screwed to the fixing bolt 3 screwed to the sleeve nut 2 using the nut 4b to set the installation level of the receiving frame 1.

The fixing bolt 3 is inserted into the bolt hole 1b so that the flange 1a of the receiving frame 1 is placed on the base 4a of the level adjusting block 4.

The fixing block 6 is inserted from the upper end of the fixing bolt 3, and the protrusion 6a is fitted into the bolt hole 1b as shown in FIG.

The nut 5 is screwed onto the fixing bolt 3, and the fixing block 6 is pressed against the flange 1a through the washer 8 integrated with the fixing block 6 to fix the receiving frame 1.

After the nut 5 is screwed onto the fixing bolt 3 and the tightening force thereof is adjusted, the restraint band of the rotation prevention cap 7 is fixed.
7d is fitted in the nut 5, and the grooved grooves 7a, 6c are fitted in the fixed block 6 so as to mesh with each other, and the engaging claw 7b is engaged with the lower end of the fixed block 6 to be integrated.

Mortar is filled around the receiving frame 1 to seal the entire circumference.

In the above-mentioned installation, in the level adjusting step, the level adjusting block 4 is rotated around the fixing bolt 3. As a result, the level adjusting block 4 moves up and down according to the rotating direction of the level adjusting block 4, and the level of the receiving frame 1 placed on the level adjusting block 4 can be easily changed to adjust the level to a high level as shown in FIG. 3, for example. And the fixing bolt 3
Since the screw connection with and is used, the height change amount can be continuously changed. Therefore, compared to the stepwise level setting when using a conventional spacer such as a washer,
The level can be set to an arbitrary height and fine adjustment can be easily performed, and the installation level of the receiving frame 1 on the road surface is optimized.

Further, it is also possible to rotate the tool holder 4d with a tool while the receiving frame 1 is placed on the level adjusting block 4. Therefore, after the receiving frame 1 is temporarily placed, it is not necessary to return it to the ground or place it on the level adjustment block 4 again. Therefore, when the washer is used, the receiving frame 1 has to be returned to the ground or pulled up each time it is repaired, but the work load is significantly reduced, and the work time is greatly shortened.

Further, since the level adjusting block 4 is made of synthetic resin and the outer shape thereof is the convex curved surface 4c having the top end of the base 4a as the apex, the height of each level adjusting block 4 is set in order to install the receiving frame 1 on the inclined surface. The convex curved surface 4c allows and supports the curved surface 4c, even if it changes. That is,
When the receiving frame 1 tilts, the supporting points move on the convex curved surface 4c, so that the convex curved surface 4c portion supports the lower surface of the flange 1a of the receiving frame 1 so as to follow the inclination, and the fixed block 6 made of synthetic resin also. Since the lowermost part of the is formed in a downward convex curved surface shape, the curved surface portion also comes into contact with the flange 1a, so that the level adjusting block 4 and the fixed block 6 hold the flange 1a securely. Fix the receiving frame 1 to.
Then, the level adjustment block 4 and the fixed block 6 are elastically deformed according to the tightening force applied to the nut 5 via the fixed block 6. For this reason, even when the receiving frame 1 is installed at an angle, a stable support structure is maintained by being held between the level adjustment block 4 and the fixed block 6.

In addition, when it is assumed that the receiving frame 1 may be installed with being tilted in this way, the level adjustment block 4 may be set to 3
If they are used by being screwed into the fixing bolts 3 of the book, the work of matching the inclination of the road surface becomes extremely easy.

On the other hand, the restraint band 7d of the anti-rotation cap 7 surrounds the nut 5, and the anti-rotation cap 7 has the grooves 7a and 6a.
It is non-rotatably fitted to the fixed block 6 by c. When the fixing block 6 is tightened by the nut 5, the protrusion 6a provided on the lower surface of the fixing block 6 has a bolt hole.
Since it is fixed to the receiving frame 1 by engaging with the inner peripheral wall of 1b, the rotation prevention cap 7 does not move unless the fixed block 6 rotates. Therefore, the nut 5 whose rotation is restricted by the restraint band 7d does not loosen, and even if the fixing bolt 3 rotates and moves upward, the nut 5 does not absolutely stop rotating and therefore the level of the nut 5 does not change. No, flange
Tightening to 1a does not weaken.

Further, in describing the level adjusting device of the present invention so far, a side block 50 having a structure in which a fixing bolt 3 such as a so-called stud bolt is screwed to the sleeve nut 2 planted at the upper end.
Although the case where the receiving frame 1 is fixed is described above as an example, the level adjusting device of the present invention finely adjusts the installation level of the receiving frame 1 even in a conventional side block in which anchor bolts are previously planted at the time of manufacturing. Of course, the purpose can be achieved.

Further, in this embodiment, the level adjustment block 4
Although the nut 4b is integrated with the base 4a by insert molding, the nut 4b may be screwed to the fixing bolt 3 using only synthetic resin. Further, if the upper end of the level adjustment block 4 and the lower end of the fixed block 6 are formed in a convex curved shape, the inclined receiving frame 1 can be securely sandwiched and fixed by the curved surface portion, so that these level adjustment blocks 4 and Fixed block 6
Not only is it made of synthetic resin, but other materials may be used.

[Effect of device]

In the present invention, the receiving frame is supported by the level adjusting block that rotates by being screwed into the fixing bolt, and the fixing block in which the protrusion is fitted into the bolt hole of the receiving frame from above and the fixed block cannot be rotated. Since the rotation prevention cap that is detachably fitted restrains the circumference of the nut screwed to the fixing bolt, the height of the level adjustment block can be arbitrarily changed and fixed. Therefore, compared with the conventional spacers such as washers,
The installation level of the receiving frame can be freely changed to easily set an appropriate height for the road surface, and a good construction body can be obtained. Further, since the receiving frame can be rotated even while being placed on the level adjustment block, it is possible to perform the construction while adjusting the receiving frame to the level of the road surface. Therefore, unlike the case where the spacer is used, the work of pulling up the receiving frame or returning it to the ground is not necessary at all, and the work load and the work time can be reduced.

If at least one of the level adjustment block and the fixed block is made of synthetic resin, the receiving frame can be elastically held and a shock absorbing function can be provided. Therefore, damage to the receiving frame is prevented, loosening of the nut from the fixing bolt is suppressed, the receiving frame is stably supported, and the receiving frame can be reliably fixed by tightening the nut from the upper surface of the flange.

Further, if the level adjusting block and the fixed block are formed in a convex curved surface shape, the receiving frame can be held by the convex curved surface portion even when the receiving frame is installed at an inclination, and the stable support is maintained.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an essential part showing an embodiment of a level adjusting device of the present invention, FIG. 2 is a plan view showing a nut excluding a nut, and FIG.
The figure is a vertical cross-sectional view of the main part when the installation level of the receiving frame is set apart from the upper end of the side block, FIG. 4 (a) is a partial cutaway view of the level adjustment block, and FIG. 4 (b) is the same. FIG. 5 (a) is a plan view, FIG. 5 (a) is a partial vertical cross-sectional view of the fixed block, FIG. 5 (b) is a bottom view, FIG. 6 (a) is a plan view of an anti-rotation cap, and FIG. 6 (b) is a partial view. FIG. 6 (c) is a bottom view, FIG. 7 is a plan view of the receiving frame and the lid body, and FIG. 8 is a schematic view of a conventional example. 1: Receiving frame, 1a: Flange 1b: Bolt hole, 2: Sleeve nut 3: Fixing bolt, 4: Level adjustment block 4a: Base, 4b: Nut 5: Nut, 6: Fixing ring 6a: Protrusion, 6b: Insertion hole 6c : Line groove, 7: Anti-rotation cap 7a: Line groove, 7b: Engaging claw 7c: Hole, 7d: Restraint band 8: Washer 50: Side mass, 51: Lid body 52: Anchor bolt, 53: Nut

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ryuichi Narutomi Maruta 691, Kazutsukikuma, Hakata-ku, Fukuoka-shi, Fukuoka Prefecture Hinode Water Supply Equipment Co., Ltd. Maruta 691 Hinode Water Equipment Co., Ltd. (72) Inventor, Mamoru Sasaki Kagami Kumatsuki, Hakata-ku, Fukuoka, Fukuoka Prefecture 691 Hinode Water Equipment Co., Ltd. (56) Reference JP 54-133745 (JP, A) Actual Kai 62-120544 (JP, U)

Claims (4)

(57) [Scope of utility model registration request] 1. A level adjusting block for supporting a receiving frame, which has a bolt hole for inserting a fixing bolt planted in a side block of an underground structure through a flange thereof, by screwing the bolt into the fixing bolt and supporting the fixing frame from below, and the fixing. Rotation that locks around a fixed block in which a bolt is inserted and a protrusion is fitted into the bolt hole from above and a nut that is screwed to the fixed bolt and that is non-rotatably and removably fitted to the fixed block A level adjusting device for a receiving frame for an underground structure, which is provided with a prevention cap. 2. The level adjusting device for an underground structure receiving frame according to claim 1, wherein at least an upper end portion of the level adjusting block supporting the receiving frame is formed of a synthetic resin. 3. The level adjustment of a receiving frame for an underground structure according to claim 1, wherein in the fixing block, at least a lowermost portion of an insertion hole through which the fixing bolt is inserted is formed of synthetic resin. apparatus. 4. The level adjustment block is formed in an upward convex curved surface shape with an upper end portion supporting a receiving frame being an uppermost portion, and the fixing block is a downward facing portion having an insertion hole for inserting the fixing bolt as a lowermost portion. The level adjusting device for a receiving frame for an underground structure according to any one of claims 1 to 3, wherein the level adjusting device is formed in a convex curved shape.