JP3247326B2 - Seal structure of manhole 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 sealing structure for preventing rainwater or the like from entering a manhole from a manhole device disposed on a pavement surface, and more particularly to raising or lowering or tilting a lid plate in accordance with a pavement surface. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seal structure of a manhole device having a manhole frame that can be made to work.

[0002]

2. Description of the Related Art When a manhole device is arranged in a conduit in which telephone cables and optical fibers are provided, it is necessary to completely prevent infiltration of rainwater and the like from the manhole device.
Since the ordinary manhole device is composed of the manhole frame 8 fixed to the manhole block and the cover plate 9 fitted to the upper surface opening thereof, the rainwater flows from the fitting portion between the manhole frame 8 and the cover plate 9. It is necessary to prevent such things from entering. For this purpose, conventionally, a method has been adopted in which the periphery of the upper surface opening of the manhole frame 8 and the outer peripheral surface of the lid plate are formed into a conical tapered surface that fits each other, and both surfaces are brought into close contact by wedge action to form a watertight structure. Was.

On the other hand, the pavement surface is gently inclined in order to improve drainage, and the pavement surface rises and lowers with repair and repair work. In view of this, the applicant of the present application has proposed a manhole device in which the upper surface of the lid plate can be adjusted to such inclination or ascending and descending of the pavement surface in the above-mentioned application (JP-A-9-177106). As shown in FIG. 5, the manhole device includes an outer frame 11 for fixing the manhole frame to the manhole block, and an inner frame 12 provided inside the outer frame so as to be able to move up and down or tilt.

The outer frame 11 is provided with a ring-shaped support projection 2 at an intermediate position on the inner wall surface, and the support projection 2 is provided with through holes 3 and screw holes 4 alternately at positions 60 degrees apart from each other. Is provided. A tension bolt 5 is inserted upward into the through hole 3, and a receiving bolt 6 having a tip directed upward is screwed into the screw hole 4.

[0005] The inner frame 12 is provided inside the outer frame 11 with a small clearance 7 in the radial direction interposed therebetween, and in order to maintain a watertight structure, the upper inner side of the inner frame 12 is fitted with the peripheral surface of the lid plate. The sealing material 1 for closing the play 7 is fitted to the upper inner surface of the outer frame 11. In addition, 12
A female screw hole is provided at every 0 degree, and the tip of the tension bolt is screwed into the female screw hole.

[0006]

However, in a manhole frame having a structure in which the inner frame is provided with a play in the outer frame, the width of the play is changed when the inner frame is inclined, and the play is changed. However, it is difficult to maintain the watertight structure. Further, since the groove for inserting the sealing material is provided on the inner diameter surface of the outer frame, there is a problem that the processing is troublesome.

[0007] The present invention relates to a manhole device in which a cover plate can be adjusted to the inclination or ascending and descending of a pavement surface, in which a change in the width of a play gap can be suppressed as small as possible and a watertight structure can be easily maintained. It is an object of the present invention to provide a seal structure.

[0008]

According to a first aspect of the present invention, there is provided a seal structure for a manhole device, wherein the outer frame is fixed to a manhole block buried in the soil, and the outer frame can be moved up and down or tilted with a play space in the outer frame. And a cover plate 9 fitted on a tapered surface formed on an upper opening edge of the inner frame of the manhole frame, and an outer frame 11 and an inner frame 12 are provided. In the seal structure of the manhole device in which the play space 7 is closed with an annular seal material in a watertight structure, the seal material is disposed at the upper end of the outer frame 11 and the heat-resistant seal material 25 and the upper portion of the inner surface of the outer frame 11 or the inner frame. 12 and a pair with an elastic sealing material 26 arranged at the lower part of the outer surface.

According to a second aspect of the present invention, in the seal structure for a manhole device according to the first aspect, a vertical screw device 10 is provided on the inner surfaces of the outer frame 11 and the inner frame 12. The frame-side connecting portion 28 is provided at an intermediate position of the height of the inner frame, and the outer peripheral surface of the inner frame 12 is formed to have a moderately convex shape in the vertical direction.

According to a third aspect of the present invention, in the seal structure of the manhole device according to the first or second aspect, the elastic seal member 26 is provided above the inner peripheral surface of the outer frame 11 or below the outer peripheral surface of the inner frame 12. It is characterized by being arranged to be fitted in the peripheral groove 27.

According to a fourth aspect of the present invention, in the seal structure of the manhole device according to the first, second or third aspect, the outer frame 1 is provided.
1 is characterized in that a substantially outer half of the top surface is a conical tapered surface.

[0012]

According to the first aspect of the present invention, since the heat-resistant seal material is disposed at the upper end of the play, molten asphalt and dust enter the play when the manhole device is installed or the pavement surface is repaired. Can be prevented, and the lower elastic seal member can be protected from heat. Furthermore,
Since the elastic sealing material 26 is disposed on the upper portion of the inner surface of the outer frame 11 or the lower portion of the outer surface of the inner frame 12, even if the inner frame 12 is moved up and down, the play gap 7
Is always sealed with a sealing material, so that rainwater or the like can be prevented from entering the manhole hole.

According to the second aspect of the present invention, the inner frame side connecting portion 28 of the screw device 10 for raising and lowering or tilting the inner frame 12 is provided.
Is provided at a position approximately at the middle of the height of the inner frame 12 and the outer peripheral surface has a moderately convex shape in the vertical direction. Therefore, even when the inner frame 12 moves up or down or tilts, a change in the width of the play gap 7 is suppressed to a small value. And a watertight structure is ensured.

According to a third aspect of the present invention, the sealing material is formed in the circumferential groove 27.
, The elastic sealing material does not come off the play space 7. When the elastic sealing material is provided below the inner frame,
The processing of the circumferential groove 27 is easy, and the elastic sealing material moves up or tilts together with the inner frame, so that a watertight structure can be ensured.

In the sealing structure according to the fourth aspect, since the outer peripheral half of the top surface of the outer frame is formed as a conical tapered surface,
The area of the thin portion of the pavement surface formed above the top surface of the first pavement 1 can be reduced. As a result, cracks and peeling of the pavement surface can be prevented, so that infiltration of rainwater or the like into the play space due to peeling of the pavement surface or the like can be prevented.

[0016]

FIG. 1 and FIG. 2 show an embodiment of the present invention. The manhole device of the present embodiment includes a manhole frame 8 fixed to a manhole block and a cover plate 9 fitted into an upper surface opening of the manhole frame. The manhole frame 8 has an inner frame 12 housed in the outer frame 11 so as to be able to move up and down or to tilt. The manhole frame 8 raises and lowers or tilts the inner frame 12 with respect to the outer frame by a screw device 10 described later. .

The outer frame 11 has an outer flange 13 provided at the lower end.
And is fixed to the upper surface of the manhole block via. The top surface of the outer frame is chamfered so that approximately half of the outer peripheral side is a conical tapered surface. As shown in FIG. 2, the inner flange 14 provided on the same plane as the outer flange 13 has, on its inner edge, a projection 1 projecting toward the center every 90 degrees.
Four 5 and 16 are formed. The protrusion 15 on the left side of the figure is wide and provided with two screw holes 17 and 18 in the vertical direction, and the protrusion 16 on the right side of the figure is narrow and has one screw hole in the vertical direction.
The screw holes 19 are provided. Two narrow projections 1
At 6 and 16, a horizontal rod 21 is provided slightly lower than the horizontal rod 21. From the intermediate position, a short connecting rod 2 is provided in the radial direction.
2 extends horizontally. The connecting rod 22 is connected to an intermediate protrusion 23 provided on the inner flange, and the intermediate protrusion 23 is provided with a vertical screw hole 24. In addition,
The screw holes 17, 18, 19, 24 can be made of helisert screw holes having corrosion resistance.

The outer peripheral surface of the inner frame 12 has a moderately convex shape which is loose in the vertical direction, and is provided inside the outer frame 11 with a cylindrical play space 7 of several mm therebetween. The inner frame 12 has a protrusion 1 on the outer frame 11.
Projections 28, at positions facing 5, 16 and intermediate projections 23,
29 and 30 are protruded. The wide projection 28 of the inner frame is opposed to the wide projection 15 of the outer frame, and the narrow projection 16 of the inner frame is opposed to the narrow projection 16 of the outer frame. The narrow protrusion 29 faces the middle frame protrusion 23 of the outer frame, and the protrusion 30 of the inner frame faces the middle protrusion 23 of the outer frame. In the wide protrusion 28 of the inner frame, the screw hole 17 of the outer frame,
Two radially extending slits 31 and 32 are provided above the outer frame 18, and the narrow protrusion 29 of the inner frame is located above the screw hole 19 of the outer frame and radially One extending slit 33 is provided. Inner frame protrusion 3
0 extends radially above the screw hole 24 in the outer frame.
Three slits 34 are provided.

The screw holes 17 and 19 of the outer frame 11 are located at four corners of a square.
The threaded portion of the pressing bolt 37 having the following shape is screwed, and the neck of the pressing bolt 37 is inserted into the slits 31 and 33 of the inner frame. The screw hole 18 and the screw hole 24 of the outer frame 11 are located at three corners of an equilateral triangle, and a screw portion of a push-up bolt 39 having an axial hexagonal hole 38 at the top is screwed into these. The tops of the push-up bolts 39 are in contact with the lower surfaces of the protrusions 28 and 30 of the inner frame. The hexagonal hole 38 of the push-up bolt 39 is inserted into the slit 32 of the projection 28 of the inner frame.
And located just below the slit 34 of the projection 30.

On the peripheral wall of the inner frame 12, eight position adjusting screws 35 which advance and retreat in the horizontal direction are screwed. The tip of the position adjusting screw (the portion that comes into contact with the outer frame) is spherical, and the base end is provided with an axial hexagonal hole. Position adjustment screw 3
5 advances into the play space 7 and the tip abuts on the inner wall of the outer frame 11, so that the relative position of the inner frame 12 with respect to the outer frame 11 in the horizontal direction can be regulated. In the play space 7 between the outer frame 11 and the inner frame 12, two upper and lower seal members 25, 2 for sealing the play.
6 is mounted. The upper sealing material 25 is a string-like body made of a heat-resistant inorganic material such as glass fiber. The lower seal member 26 is a ring made of silicone rubber, and is fitted in a circumferential groove 27 provided at a lower portion of the outer peripheral surface of the inner frame.

The assembly of the manhole frame of this embodiment will be described. The outer frame 11 is fixed to the upper surface of the manhole block with bolts, and push-up bolts 39 having a hexagonal hole in the top of the head are screwed into the screw holes 18 and 24. Next, inner frame 2
The inner frame 12 is housed in the outer frame 11 so that the projections 28 and 30 of the inner frame 12 abut on the lifting bolt 39. At this time,
The slits 31 and 32 of the inner frame are positioned above the screw holes 17 and 18 of the outer frame. Next, four pressing bolts 37 with spherical washers 36 are inserted through the slits 31 and 33 and screwed into the screw holes 17 and 19 of the projections.

FIG. 3 shows the positional relationship between the play space 7 and the upper and lower seals when the inner frame is at the bottom, and FIG. 4 shows the play space 7 and the upper and lower seals when the inner frame is at the top. It shows the positional relationship of the materials. In any case, the elastic sealing material 26 does not come off the play space 7. Although not shown, the same applies to the case where the elastic sealing material 26 is provided above the inner periphery of the outer frame 11.

When the height of the cover plate, that is, the upper edge of the manhole frame is changed from the state shown in FIG. 3 to the state shown in FIG. 4, a hexagon wrench is inserted into the hexagon hole 38 of the three push-up bolts 39 and the push-up bolts 39 To adjust the vertical position and tilt.
Next, a spacer 41 corresponding to the vertical space 40 between the inner frame 12 and the outer frame 11 is inserted, and the push-up bolt 39 is lowered to support the inner frame 12 with the spacer 41. Next, the pressing bolt 37 is turned to fasten the inner frame 12 to the outer frame 11 with the spacer 41 interposed therebetween. When the inner frame 12 is inclined with respect to the outer frame 11, the spherical washer 36 absorbs the angle of inclination, so that the inner frame 12 can be firmly fastened to the outer frame 11, and the loosening of the screw can be prevented. Does not occur. Finally, position adjustment screw 3
5 so that it does not move in the horizontal direction.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a plan view of an outer frame of the manhole device.

FIG. 3 is a cross-sectional view when the inner frame is at the bottom.

FIG. 4 is a cross-sectional view when the inner frame is at the top;

FIG. 5 is a sectional view showing a seal structure of a conventional manhole device.

[Explanation of symbols]

 7 Play space 8 Manhole frame 9 Cover plate 10 Screw device 11 Outer frame 12 Inner frame 25 Upper seal material 26 Lower seal material 27 Circumferential groove 28 Projection

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E02D 29/14

Claims (4)

(57) [Claims] 1. An outer frame (11) fixed to a manhole block buried in the soil, and an inner frame (12) provided inside the outer frame so as to be movable up and down or tiltable with a play (7). A manhole frame, and a cover plate (9) fitted on a tapered surface formed on an upper opening edge of the inner frame (12) of the manhole frame, and an outer frame (11) and an inner frame (12) are formed. In a seal structure of a manhole device in which the gap between the gaps (7) is sealed in a watertight structure with an annular seal material, the seal material is disposed at the upper end of the outer frame (11) with the heat-resistant seal material (25) and the outer frame. A seal structure for a manhole device, comprising: an elastic sealing material (26) disposed on an upper portion of an inner surface of (11) or a lower portion of an outer surface of an inner frame (12). 2. A vertical screw device (10) is provided on the inner surfaces of the outer frame (11) and the inner frame (12), and the inner frame side connecting portion (28) of the screw device (10) is connected to the inner frame. And the inner frame
2. The seal structure for a manhole device according to claim 1, wherein the outer peripheral surface of (12) is formed to have a moderately convex shape in the longitudinal direction. 3. An elastic sealing material (26) is fitted in a circumferential groove (27) provided above the inner peripheral surface of the outer frame (11) or below the outer peripheral surface of the inner frame (12). 3. The method according to claim 1, wherein
The seal structure of the described manhole device. 4. The seal structure for a manhole device according to claim 1, wherein a substantially outer peripheral half of a top surface of the outer frame (11) is a conical tapered surface.