JPS5935646Y2 - manhole - Google Patents

Description

[Detailed description of the invention] This invention relates to a manhole that allows stable scaffolding to be attached to the neck of the manhole, which is constructed between the concrete wall inside the manhole and the iron cover installed on the ground surface. It is.

When constructing a manhole, in order to match the height of the iron cover with the road surface so that it does not become an obstacle to traffic, the concrete walls inside the manhole are covered with
Layering concrete blocks through mortar,
A cylindrical manhole neck is formed to adjust the height of the iron cover.

Conventionally, there was usually no foothold at the adjustment part between the concrete wall and the iron cover of the manhole, and a separate ladder was installed to climb up and down the manhole, making it inconvenient to handle and requiring scaffolding. The disadvantage was that it lacked stability.

Therefore, in the process of stacking the manhole neck in order to adjust the height of the iron cover, the present invention aims to create a stable and firm scaffold by sandwiching the mounting part of the scaffolding hanger between the upper and lower blocks that are stacked on top of each other. It is something.

The invention will now be described with reference to illustrated embodiments.

In FIG. 3, reference numeral 1 denotes a manhole neck adjustment block, which is made of concrete and has a shape that fits into quarters of an annular disk, and is reinforced with reinforcing bars inside.

The block 1 has a circular hole 2 drilled in the center in order to lock it to an anchor bolt installed on the concrete wall soil surface in the manhole, and on both sides on the same circumference as the circular hole 2. Two circular holes 3, 4 for inserting the scaffolding hanger 8 are provided with a spacing equal to the spacing between the upright locking parts 9, 10 of the scaffolding hanger 8, which will be described later.

Furthermore, grooves 5 and 6 for anchor bolt locking are carved on both end faces of the block 1 at positions where the center is on the same circumference as the central circular hole 2, and one of the outer peripheral faces is Chamfer 7.

In Fig. 4, reference numeral 8 denotes a scaffold hanging device, which has a U-shaped rod-like body and locking portions 9 and 1 with both ends bent and standing upright.
has 0.

In the center hole 2 of the concrete block 1 of the above shape,
Anchor bolts 11 planted in the concrete wall soil surface in the manhole are inserted.

Similarly, four anchors are planted at equal intervals.
Four blocks are secured to the bolts to form an annular concrete plate as shown in Fig. 1.

Next, on top of that, the end surfaces of both blocks are brought into contact so that the grooves 5.6 provided on the end surfaces of the two blocks match,
Anchor bolts 11 are inserted into the holes thus formed and locked, thereby forming an annular concrete slab by arranging four blocks.

That is, the blocks in the first and second stages are stacked at an angle of 45 degrees.

At that time, the 1,000 blocks were glued together with mortar to stabilize them.

Further, the hole into which the anchor bolt is inserted is also filled with mortar 12 and fixed.

Similarly, ring-shaped concrete slabs formed by four blocks are stacked one on top of the other, and the height is adjusted so that the iron cover of the manhole matches the ground surface, creating a cylindrical manhole neck as shown in Figure 2. .

Fine adjustments to the height of the iron lid are made using mortar.

As mentioned above, in the process of stacking blocks and adjusting the height of the iron lid, when placing a block of an appropriate height for mounting the scaffolding hanger 8, After inserting the locking parts 9 and 10 of the scaffolding hanger into the circular holes 3 and 4, the block is locked to the anchor bolt, and the scaffolding hanger 8 is held between the upper and lower blocks, and the U-shaped part protrude inside the manhole.

The gaps in the circular holes 3 and 4 are filled with mortar and fixed, and
The gap between the 1,000 blocks caused by the thickness of the scaffolding hanger 8 is filled with mortar and adjusted so that there is no difference in height between the blocks to which the scaffolding hanger is attached and the blocks to which the scaffolding hanger is not attached.

In this embodiment, as described above, a stable scaffold can be installed by inserting the scaffolding hanger 8 into the circular holes 3 and 4 of the block 1, sandwiching it between the upper and lower blocks, and further fixing it with mortar. In addition, in the above embodiment, parallel grooves are carved in the lower surface of the block 1 from the circular holes 3 and 4 for inserting the scaffolding hangers inward in the direction of the center of the circumference where the circular holes are located. For example, by fitting the scaffold hanger 8 into the groove, it becomes unnecessary to use mortar to adjust the gap between the upper and lower blocks caused by the thickness of the scaffold hanger 8.

It should be noted that each block is not limited to the case where the annular disk is divided into four equal parts, but it goes without saying that it is also possible to divide the annular disk into three equal parts, six equal parts, etc.

As mentioned above, the present invention provides a stable structure that does not come loose by sandwiching the scaffold hanger between the blocks when stacking adjustment blocks on the manhole neck to adjust the height of the manhole iron cover. It is something that can give you a foothold.

In particular, in the present invention, the bent locking portions erected at right angles at both ends of the U-shaped scaffolding hangers glued between the blocks are inserted into the holes of the blocks, and between these blocks and the scaffolding hangers. are joined and fixed with a filling material such as mortar, so the load applied to the scaffolding hanger is applied to the blocks formed by stacking them in a cylindrical shape inward to each other, that is, in the direction that connects the cylindrical assembly. Therefore, according to this structure, not only can the scaffolding hanger itself be firmly attached without loosening, but also it is possible to construct a solid block laminate that is tightly fixed.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the present invention, and FIG. 2 is a plan view showing an embodiment of the present invention.
FIG. 3 is a perspective view of the manhole neck adjustment block, and FIG. 4 is a perspective view of the scaffolding hanger. 1: Manhole neck adjustment block, 8: Scaffolding hanger.

Claims (1)

[Scope of utility model registration request] At the neck of the manhole, which is formed into a cylindrical shape by stacking blocks on the concrete wall soil inside the manhole, both ends of the scaffolding hanger, which is shaped like a box, are sandwiched and supported between the mutually stacked blocks. A manhole that is opened by inserting right-angled bent locking parts erected at both ends into the holes of the blocks, and fixing the blocks and the gaps between the scaffolding hangers with a filling material such as mortar.