JPS5931800Y2 - Manhole combination quick reference scale - Google Patents

Description

[Detailed description of the invention] The present invention relates to a manhole combination quick reference scale used in a combination quick reference chart for prefabricated manholes. A combination of manholes in which the bottom position of the inflow pipe is aligned with the position of the head difference Om on the scale, and a chart is provided in bar graph form for each inner diameter of the inflow pipe, showing the inner diameter, outer diameter, drilling diameter, and drilling allowance dimension of the inflow pipe. This is about the quick reference scale.

When installing a prefabricated manhole with an inflow pipe, the dimensions of the manhole members must be selected and combined according to the position of the inflow pipe so that the drilling position of the inflow pipe does not overlap the joints of each manhole component. However, this selection and combination work has traditionally been difficult.

In order to simplify the above selection combination, the applicant has
As shown in the figure, the cover and catch size a for each manhole depth L
, several combinations g, h, i of adjustment ring dimension b, diagonal wall dimension C1 straight wall dimension d, building block dimension e, bottom plate dimension f, etc.
He first devised a quick reference table A of manhole combinations that represented .
However, if you use this quick reference table A, when installing the inflow pipe 1 as shown in Figure 2, you can check the head difference 2 (distance from the bottom of the inflow pipe to the bottom of the outflow pipe) from the design drawing and calculate the value. Determine the bottom position 3 of the inflow pipe by plotting it on quick reference table A, and from the bottom position 3 move upward to find the inner diameter 4 and pipe thickness 5 of the inflow pipe 1.
, measure the gap size 6 between the inflow pipe 1 and the hole for installing it, and the allowance size 7 for drilling with a scaled ruler, etc., and plot them on quick reference table A, and below the pipe bottom position 3. Similarly, the pipe thickness dimension 5, gap dimension 6, and drilling allowance dimension 7 can be plotted in the same manner to select a manhole combination in which there is no seam between the upper and lower ends of the plot.

The present invention is a completely new method that can be used in conjunction with Quick Reference Table A, and can easily and reliably select a suitable manhole for installing the inflow pipe 1 without having to measure and plot each dimension on Quick Reference Table A as described above. It is about a scale.

One embodiment of the present invention will be explained in detail with reference to Figs. 3 and 4. In Fig. 3, B is a quick reference scale according to the present invention, which is made of a transparent thin plate and has the same reference scale as A on both sides. A scale head scale 8 is provided with the vertical direction reversed, and the scale position of the head Om of the scale 8 is matched with the pipe bottom position 3 of the inflow pipe 1, and the inflow pipe is adjusted based on the pipe bottom position 3. 1, the inner diameter 4 of the inflow pipe 1 upwards from the tube bottom position 3,
Pipe thickness dimension 5, gap dimension 6, and drilling allowance dimension 7 are plotted in a bar graph, and from the tube bottom position 3 downward, the pipe thickness dimension 5, gap dimension 6, and drilling margin dimension 7 are similarly plotted in a bar graph. The whole is constructed by drilling small holes 9 at the outer ends of the upper and lower drilling allowance dimensions 7 shown in a diagram and further represented in the form of a bar graph.

When using quick reference scale B according to the present invention, first check the head 2 from the design drawing. For example, as shown in Figure 4, for a manhole with a manhole depth L of 1.4 m, assuming a head of 0.2 m, the inner diameter is 0.35 m. To explain the case of installing the inflow pipe 1, first, the scale 1 indicating the manhole depth L in quick reference table A.
Align the drop scale 8 of the quick reference scale B with the 0.2 m position at the 4 m position.

Next, using Quick Reference Table A, we can easily find a combination of manholes in which there is no seam between the upper and lower ends of the drilling allowance dimension 7 in the chart where the inner diameter 4 of the inflow pipe 1 is 0.35 m, that is, the manhole combination j or k. You can choose.

Further, by inserting a writing instrument into the small hole 9 provided at the end of the diagram showing the drilling allowance dimension 7 and marking it on the quick reference chart A, the upper and lower ends of the drilling allowance dimension 7 can be easily marked.

As mentioned above, the quick reference scale according to the present invention is provided with a head scale of the same scale as the quick reference chart on the side end of the transparent thin plate, and matches the position of the head Qm with the bottom position of the inlet pipe, and uses the bottom position as a reference. The inner diameter, pipe thickness, gap, and drilling margin of the inflow pipe are shown in the upper part, and the pipe thickness, gap, and drilling allowance are shown in the form of a bar graph in the lower part. Since it has been structured and charted, you can use a quick reference table to select combinations of manholes, and use a scaled ruler etc. to check the head,
There is no need to measure and plot the inner diameter, pipe thickness, etc. of the inflow pipe; simply align the head scale of the quick reference scale of this invention with the scale indicating the manhole depth in the quick reference table, and the joint will be located at the drilling position of the inflow pipe. This makes it possible to easily and reliably select manhole combinations that do not cause such problems.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a quick reference table of manhole combinations, FIG. 2 is a partial sectional view of a manhole, and FIGS. 3 and 4 are explanatory diagrams of a quick reference scale of manhole combinations according to the present invention. A: Quick reference table, b: Quick reference scale, 1: Inflow pipe, 2: Head, 3: Inflow pipe bottom position, 4: Inflow pipe inner diameter, 5: Pipe thickness dimension, 6: Gap dimension, 7: Drilling allowance dimension , 8: Head scale.

Claims (1)

[Scope of utility model registration request] In the manhole combination quick reference scale used in the prefabricated manhole combination chart, a head scale 8 that matches the scale dimension of quick reference table A is provided on the side edge of the transparent plate, and the inflow pipe is placed at the drop Om scale position of the scale 8. In addition to aligning the tube bottom position 3, the inflow tube inner diameter 4, tube thickness dimension 5, gap dimension 6, and drilling allowance dimension 7 are plotted in a bar graph upward from the tube bottom position 3 for each inner diameter of the inflow tube 1, and the tube bottom position is A quick reference scale of manhole combinations is shown below from 3 in the same manner as the pipe thickness dimension 5, gap dimension 6, and drilling allowance dimension 7 in the form of a bar graph.