JP3057020B2 - Lifting device for receiving frame for manhole cover - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting device for a manhole cover receiving frame, in particular, a jack bolt rotating operation for inserting and removing a height adjusting spacer of the receiving frame can be performed from outside the manhole. The present invention relates to an elevating device for a manhole cover receiving frame that facilitates raising and lowering operation of the receiving frame and that can reliably prevent the road surface around the receiving frame from being turned up when the receiving frame is raised.

[0002]

2. Description of the Related Art Manholes installed in water and sewage pipelines or telecommunication cable tunnels constructed underground are:
It is opened and closed by fitting a manhole cover into a receiving frame buried so that the upper surface matches the road surface. Although the upper surface of the receiving frame and the road surface are installed so as to always coincide with each other, a step may be generated between the upper surface of the receiving frame and the road surface due to resurfacing, settlement, or the like. When a step is generated between the upper surface of the receiving frame and the road surface, noise is generated by passing the vehicle.

Conventionally, for example, a step formed between the upper surface of the receiving frame and the road surface due to the lifting of the road surface due to the resurfacing of the road surface has been repaired as follows. That is, first, the pavement road surface around the receiving frame is cut by the cutter.
Then, the road surface of the cut portion is dug up, and thereafter, a concrete height adjusting ring is placed on the uppermost manhole-side lump. Next, a spacer is interposed between the height adjusting ring and the receiving frame to finely adjust the height so that the upper surface of the receiving frame and the road surface match. Next, the mortar is filled between the height adjusting ring and the receiving frame, and then the receiving frame is fixed by bolts planted on the upper surface of the manhole-side lump, and then cured. Then, after backfilling, finally paving the road surface.

[0004] As described above, the work for adjusting the height of the receiving frame requires a great deal of labor and time, so that a large amount of construction cost is required, which is a problem. Therefore, the inventor of the present application has proposed a means that can easily adjust the height of the receiving frame in a short time without performing construction such as cutting, excavating, and re-paving the pavement road surface. This means has already been registered as Patent No. 2552252. Hereinafter, this means is referred to as a conventional technique and will be described with reference to the drawings.

FIG. 13 is a partial cross-sectional view showing a prior art installed in a manhole, FIG. 14 is a plan view showing a prior art jack spacer, and FIG. 15 is a plan view showing a split spacer in the prior art.

13 to 15, 1 is a manhole cover, 2 is a receiving frame into which the manhole cover 1 is fitted, 3
Is a cast iron manhole-side lump constructed below the receiving frame 2. In the case of water supply, the manhole-side lump 3 is made of cast iron as in this example. A plurality of manhole-side lump 3 are vertically connected to each other by bolts (not shown), and valves (not shown) are provided inside. Zu) are contained.

Reference numeral 4 denotes a ring-shaped jack spacer mounted on the manhole-side lump 3. As shown in FIG. 14, the jack spacer 4 has a plurality of screw holes 4A and a plurality of through-holes 4B for connecting bolts to be described later.

Reference numeral 5 denotes a plurality of jack bolts. Each jack bolt 5 is screwed into the screw hole 4A of the jack spacer 4 from the jack bolt through hole 3A formed on the upper surface of the manhole-side lump 3 and abuts on the lower surface of the receiving frame 2. Therefore, when the jack bolt 5 is turned, the receiving frame 2 is pushed upward.

Reference numeral 6 denotes a ring-shaped height adjusting spacer. The height adjusting spacer 6 is, as shown in FIG.
6A, 6B, 6C and 6D. Thereby, the height adjusting spacer 6 can be inserted from the inside of the manhole into the space formed between the receiving frame 2 and the jack spacer 4 without excavating the receiving frame 2 from the road surface 7. In each of the height adjusting spacers 6A to 6D, a plurality of jack bolt grooves 8 and a plurality of through holes 9 of the coupling bolts are formed.

Reference numeral 10 denotes a plurality of connecting bolts. Each of the connecting bolts 10 is connected to a through hole 4B of the jack spacer 4, a through hole 9 of the height adjusting spacer 6, and a receiving frame 2 through a connecting bolt through hole (not shown) formed on the upper surface of the manhole side block 3. Is inserted into a through hole (not shown) for a connecting bolt and is fastened by a nut 11.

According to the prior art configured as described above, the height of the receiving frame 2 is adjusted as follows.
First, the manhole cover 1 is removed from the receiving frame 2, and all the connecting bolts 10 are removed. Next, each jack bolt 5 is turned evenly. Each jack bolt 5 is screwed into the screw hole 4A of the jack spacer 4, and the foot portion is in contact with the lower surface of the receiving frame 2, so that the receiving frame 2 rises horizontally. next,
When the receiving frame 2 is raised, the height adjusting spacer 6 having a predetermined thickness is inserted into the space formed between the receiving frame 2 and the jack spacer 4. Spacer for height adjustment 6
Is divided so that the receiving frame 2 can be inserted into the space from inside the manhole without excavating the receiving frame 2 from the road surface 7. In this way, the height of the receiving frame 2 is adjusted to the road surface 7.
When the height is matched, the receiving frame 2 is fixed again to the manhole side lump 3 via the jack spacer 4 and the height adjusting spacer 6.

As described above, in the prior art, the height of the receiving frame 2 is adjusted by using the jack bolt 5.
This method has an advantage that it can be easily performed in a short time without performing work such as cutting, excavating, and re-paving a pavement road surface.

[0013]

However, the above-mentioned prior art has the following problems.
Each jack bolt 5 is located inside the manhole and has a downward head, so that the jack bolt 5
Was extremely difficult to rotate. Usually, since the side surface of the receiving frame 2 and the pavement road surface are firmly adhered to each other, the road surface may be turned up with the rise of the receiving frame 2, and in this case, it is necessary to re-pave.

Accordingly, an object of the present invention is to facilitate the operation of lifting and lowering the receiving frame by allowing the jack bolt to be rotated when inserting and removing the spacer for adjusting the height of the receiving frame from outside the manhole. An object of the present invention is to provide an elevating device for a manhole cover receiving frame, which is a device for elevating and lowering a receiving frame for a manhole cover and capable of preventing the turning of the road surface caused by the rise of the receiving frame.

[0015]

According to the present invention, a manhole cover is fitted between a lower surface of a receiving frame having a vertically formed outer peripheral surface and an upper surface of a manhole-side lump constructed below the receiving frame. In order to insert the ring-shaped height adjusting spacer of the receiving frame, or to remove the inserted height adjusting spacer, to raise and lower the receiving frame, in the elevating device for the manhole cover receiving frame, a plurality of A jack bolt and a screw hole formed inside the receiving frame, into which the jack bolt is screwed, the lower end of the jack bolt abuts on the upper surface of the spacer or the upper surface of the manhole-side lump, from the outside of the manhole. by turning the jack bolt is one characterized in that the receiving frame is raised and lowered, and said receiving frame periphery across said receiving frame A road surface pressing member having a jack bolt insertion hole formed thereon and a nut screwed onto the jack bolt; and By turning, when the receiving frame is raised, a force for pressing the road surface around the receiving frame is applied to the road surface pressing member.

[0016]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a lifting device for a manhole cover receiving frame according to the present invention.

FIG. 1 is a sectional view showing a device for raising and lowering a manhole cover receiving frame of the present invention, which is installed in a waterworks manhole. FIG. 2 is a diagram showing a receiving frame of the manhole cover receiving frame raising and lowering device of the present invention. FIG. 3 is a plan view showing a spacer for height adjustment in the elevating device for the manhole cover receiving frame according to the present invention, FIG. 3 is a sectional view taken along the line AA of FIG. 3, and FIG. , A plan view showing a road surface pressing member in the elevating device for the manhole cover receiving frame, FIG. 6 is a sectional view showing a state before adjusting the height of the receiving frame, and FIG. 8 is a cross-sectional view showing a state where the jack bolt is set, FIG. 9 is a cross-sectional view showing a state where the receiving frame is raised by rotating the jack bolt,
FIG. 10 is a cross-sectional view showing a state in which a height adjusting spacer is inserted and fastened by a connecting bolt. FIG. 11 is a cross-sectional view showing a state in which height adjustment of a receiving frame is completed and a manhole cover is fitted. FIG. 12 is a cross-sectional view showing the elevating device for the manhole cover receiving frame of the present invention installed in the sewer manhole.

1 to 11, reference numeral 12 denotes a manhole cover, and reference numeral 13 denotes a receiving frame into which the manhole cover 12 is fitted. Inside the receiving frame 13, as shown in the garden 2, a screw hole 13 </ b> A into which a jack bolt described later is screwed and a through hole 13 </ b> B for a coupling bolt described later are formed.

Reference numeral 14 denotes a cast iron manhole-side lump constructed below the receiving frame 13;
Are vertically connected to each other by bolts 15, and a valve 16 is accommodated therein.

Reference numeral 17 denotes a plurality of ring-shaped height adjusting spacers mounted on the manhole-side mass 14. As shown in FIG. 3, each height adjusting spacer 17 is
A, 17B, and 17C are divided into three parts.
Another height adjusting spacer 17 can be inserted from the inside of the manhole into a space formed between the height adjusting spacer 17 and the space below the manhole. Each of the height adjusting spacers 17A, 17B, 17C has a through hole 18 of the coupling bolt and a projection 19 with which the foot of the jack bolt abuts. As shown in FIG. 4, a caulking agent filling groove 20 is formed on the inner peripheral upper edge of the jack spacer 17. Filling the groove 20 with a caulking agent enhances the watertightness of the overlapping portion of the jack spacer 17, so that water can be prevented from penetrating into the manhole and land subsidence around the manhole due to this.

Reference numeral 21 denotes a plurality of jack bolts.
Each jack bolt 21 is screwed into the screw hole 13 </ b> A of the receiving frame 13, and the foot portion abuts on the projection 19 of the height adjusting spacer 17 at the top.

Reference numeral 22 denotes a plurality of connecting bolts. Each of the connecting bolts 22 is inserted into the through-hole 18A of the spacer 17 for height adjustment and the through-hole 13B for the connecting bolt of the receiving frame 13 from the through-hole 14A for the connecting bolt formed on the upper surface of the uppermost manhole side block 14. And tightened by the nut 23.

Reference numeral 24 denotes a road surface turning preventing means for preventing the road surface 7 from being turned up as the receiving frame 13 rises. The road surface turning prevention means 24 includes a road surface pressing member 25 having a through hole 25 </ b> A for a jack bolt, which is placed on the road surface around the receiving frame across the receiving frame 13, and a nut 26 screwed to the jack bolt 21. It consists of The nut 26 applies a force for pressing the road surface 7 around the receiving frame to the road surface pressing member 25 when the receiving frame 13 is raised by rotating the jack bolt 21. The road surface turning prevention means 24 is not necessary when the turning of the road surface 7 does not occur.

According to the present invention configured as described above,
According to the elevating device for the manhole cover receiving frame, the height of the receiving frame 13 is adjusted as follows. This example is shown in FIG.
In this case, the road surface 7 is higher than the upper surface of the receiving frame, and the road surface turning prevention means 24 is used.

First, as shown in FIG.
2 is removed from the receiving frame 13, and all the connecting bolts 22 are removed. Next, as shown in FIG. 8, the road surface turning prevention means 24 is installed, and the jack bolt 21 is connected to the road surface pressing member 25.
Through the through hole 25A, and is screwed into each screw hole 13A of the receiving frame 13.

Next, as shown in FIG. 9, the jack bolt 21 is turned until the upper surface of the receiving frame 13 coincides with the road surface 7.
At this time, each jack bolt 21 is turned evenly to
3 is raised horizontally. As a result, a space (S) is formed between the receiving frame 13 and the uppermost height adjusting spacer 17. Since each jack bolt 21 is outside the manhole, the rotation operation of the jack bolt 21 can be easily performed. In addition, no turning of the road surface occurs due to the action of the road surface turning preventing means 24.

Next, as shown in FIG. 10, when the receiving frame 13 is raised until the upper surface thereof coincides with the road surface 7, the receiving frame 13 is lifted.
As a result, the space (S) formed between the receiving frame 13 and the uppermost level of the height-adjustment spacer 17 is provided with another height-adjustment spacer (A in FIGS. 10 and 11) having a predetermined thickness. ). Spacer for height adjustment 1
7 is divided, so that the receiving frame 13 can be inserted into the space from inside the manhole without excavating the receiving frame 13 from the road surface 7.

Then, as shown in FIG. 11, the connecting bolts 22 are tightened again so that the receiving frame 13 is attached to the height adjusting spacer 1.
7 and fixed to the manhole-side lump 14. In this example, a plurality of height adjusting spacers 17 are used. However, when the receiving frame 13 is placed directly on the manhole-side lump 14, the height adjusting spacer A Put it on the manhole side lump 14.

In the above-described example, the lifting device for the manhole cover receiving frame of the present invention is installed in the water supply.
When the present invention is applied to a sewer, as shown in FIG. 12, a connecting ring 27 is fixed on a concrete manhole-side lump 14 at the uppermost stage with bolts 28, and the receiving frame 13 is connected to the manhole side via the connecting ring 27. It is fixed to the mass 14. In FIG. 12, the same numbers as those in the above-described example indicate the same items, and description thereof will be omitted.

In the above embodiment, the present invention is applied to a round manhole, but can also be applied to a square manhole.

[0031]

As described above, according to the present invention, the jack bolt can be rotated from the outside of the manhole when the height adjusting spacer of the receiving frame is inserted and removed, so that the receiving frame can be easily moved up and down. operation is performed, and, if
On the other hand , by providing the road surface turning prevention means, in addition to the above-described purpose, a useful effect that the turning of the road surface caused by the rise of the receiving frame can be prevented can be provided.

[Brief description of the drawings]

FIG. 1 is an illustration of the present invention installed in a waterworks manhole.
It is sectional drawing which shows the raising / lowering apparatus of the receiving frame for manhole covers.

FIG. 2 is a plan view showing a receiving frame in the manhole cover receiving frame elevating device according to the present invention.

FIG. 3 is a plan view showing a height adjusting spacer in the elevating device for the manhole cover receiving frame according to the present invention.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a plan view showing a road surface pressing member of the elevating device for the manhole cover receiving frame of the present invention.

FIG. 6 is a cross-sectional view showing a state before height adjustment of a receiving frame.

FIG. 7 is a cross-sectional view showing a state in which a connecting bolt is removed.

FIG. 8 is a sectional view showing a state in which jack bolts are set.

FIG. 9 is a cross-sectional view showing a state in which the jack bolt is rotated to make the receiving frame upper nose.

FIG. 10 is a cross-sectional view showing a state in which a spacer for height adjustment is inserted and fastened by a connecting bolt.

FIG. 11 is a cross-sectional view showing a state where the height adjustment of the receiving frame is completed and the manhole cover is fitted.

FIG. 12 is a cross-sectional view showing a lifting / lowering device for a manhole cover receiving frame according to the present invention installed in a sewer manhole.

FIG. 13 is a partial sectional view showing a conventional technique installed in a manhole.

FIG. 14 is a plan view showing a conventional jack spacer.

FIG. 15 is a plan view showing a divided spacer according to the related art.

[Explanation of symbols]

 1: Manhole cover 2: Receiving frame 3: Manhole side lump 3A: Jack bolt through hole 4: Jack spacer 4A: Screw hole 4B: Coupling bolt through hole 5: Jack bolt 6, 6A, 6B, 6C, 6D: High Spacer for adjusting height 7: Road surface 8: Through hole for jack bolt 9: Through hole for connecting bolt 10: Connecting bolt 11: Nut 12: Manhole cover 13: Receiving frame 13A: Screw hole 13B: Through hole for connecting bolt 14: Manhole side Lump 14A: Through-hole for connecting bolt 15: Bolt 16: Valves 17, 17A, 17B, 17C: Spacer for adjusting height 18: Through-hole for connecting bolt 19: Projection 20: Groove 21: Jack bolt 22: Connecting bolt 23 : Nut 24: Road surface turning prevention means 25: Road surface pressing member 25 A: Through hole for jack bolt 26: Nut 27 The coupling ring 28: bolt

Claims (1)

(57) [Claims] 1. An outer peripheral surface in which a manhole cover is fitted.
To insert a ring-shaped height adjusting spacer of the receiving frame between the lower surface of the vertically formed receiving frame and the upper surface of the manhole-side lump constructed below the receiving frame, or the inserted height adjustment To remove the spacer for
In order to raise and lower the receiving frame, in the lifting device for the manhole cover receiving frame, comprising a plurality of jack bolts, formed inside the receiving frame, a screw hole with which the jack bolt is screwed,
The lower end of the jack bolt is in contact with the upper surface of the spencer or the upper surface of the manhole-side lump, and by turning the jack bolt from outside the manhole, the receiving frame is raised and lowered , and straddles the receiving frame. A round or square road surface pressing member, on which a jack bolt insertion hole is formed, which is placed on the road surface around the receiving frame, and a road surface turning-over preventing means comprising a nut screwed into the jack bolt. And, the nut, by turning the jack bolt, when the receiving frame is raised, the force to press the road surface around the receiving frame to the road surface pressing member, characterized in that the receiving frame for a manhole cover, lift device.