JP3751009B2 - Raising frame of septic tank manhole - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a raising frame of a septic tank manhole.
[0002]
[Prior art]
The septic tank is generally provided with a manhole for each treatment tank for water quality inspection, inspection and repair of internal equipment, and sludge removal. The manhole is defined by a manhole mouth (neck) formed integrally with the septic tank. In order to close the manhole port so that it can be opened and closed, a manhole frame is generally provided on the manhole port, and a manhole cover is detachably mounted on the manhole frame.
[0003]
The septic tank is preferably embedded at a depth such that the manhole cover is at the same level as the ground level. However, there are cases where it is necessary to bury the septic tank deeper than the designed depth due to piping and the like.
Conventionally, in such a case, a manhole raising frame called an adjuster has been used. That is, as shown in FIG. 1, the manhole raising frame 3 is placed on the manhole port 2 of the septic tank 1, the manhole frame 4 is supported by the raising frame 3, and the manhole cover 5 is attached to the manhole frame 4. is doing.
Since the embedment depth of the septic tank may vary depending on the operation site, the height of the raising frame 3 must be adjusted accordingly as shown on the left and right of the manhole center axis in FIG.
[0004]
[Problems to be solved by the invention]
Conventionally, in order to change the height of a manhole raising frame, for example, a plurality of types of raising frames having different heights such as 100 mm, 200 mm, and 300 mm are prepared in advance, and one raising frame of an appropriate height is provided. Select and cut at the desired height with a saw or the like. In this method, since a plurality of types of raising frames having different heights must be prepared and placed as stock, it is troublesome to manage the stock. Moreover, since the remaining material generated by cutting has no way of reuse and effective use, it must be disposed of as waste, resulting in a waste of resources.
[0005]
In the prior art, a screw-type cylinder is constructed in which one manhole raising frame is constituted by two upper and lower threaded cylinders screwed to each other, and the entire height is adjusted by relatively rotating the upper and lower cylinders. A raised frame is known.
This method has the advantage that the height can be adjusted without cutting the raised frame, and the raised frame can be attached simply by placing it on the manhole port of the septic tank, so that the mounting operation is simple.
However, this screw-type raising frame has a drawback that it is difficult to take a gradient for draining the manhole cover by cutting it obliquely. Moreover, since it can be expanded and contracted only within the range of the engagement length of the screw, the height can be adjusted generally only to about 50 to 100 mm.
[0006]
An object of the present invention is to provide a raising frame for a septic tank manhole, which has a high degree of freedom in height adjustment and can simplify inventory management.
Another object of the present invention is to provide a septic tank manhole raising frame capable of effectively utilizing the remaining material generated by cutting for height adjustment.
Another object of the present invention is to provide a septic tank manhole raising frame that is easy to store, transport and handle.
[0007]
[Means for Solving the Problems]
The raising frame of the septic tank manhole of the present invention is
(1) A main frame including a skirt that can be fitted into a manhole port of a septic tank, and a raising cylinder that rises integrally from the skirt to a predetermined height;
(2) A spare frame skirt that can be fitted into a manhole port of the septic tank and that can be detachably stored inside the skirt of the main frame; A preliminary fitting frame comprising a short fitting support cylinder for fitting and supporting the remaining material obtained by cutting the raising cylinder of
And a combination.
[0008]
Although details will be described later with reference to the drawings, the combined raising frame of the present invention can be handled in a state in which the spare frame is fitted inside the main frame during transportation and storage.
In use, the spare frame can be removed from the main frame and the main frame can be used first. According to the embedding depth of a specific manhole port in the septic tank, the cylinder for raising the main frame is cut at a desired height, and the main frame is attached to the manhole port.
The remaining material of the raising cylinder generated by cutting the main frame can be combined with the spare frame and used as another raising frame.
Therefore, according to the present invention, it is possible to simplify inventory management and effectively use the remaining material, and facilitate transportation and inventory management.
[0009]
In a preferred embodiment, the inner diameter dimension of the main frame skirt in the free state is set to be slightly (for example, 1-2 mm) smaller than the outer diameter dimension of the corresponding preliminary frame skirt in the free state. When the spare frame is fitted inside, the spare frame skirt is pushed inward in the radial direction, and the spare frame skirt is tightly fitted to the main frame skirt.
In this way, the inner diameter of the main frame can be kept as small as possible, and the main frame skirt can be fitted into the manhole opening. Further, when the spare frame is fitted inside the main frame, the spare frame is securely held.
[0010]
Preferably, a plurality of ribs spaced apart at equal intervals in the circumferential direction and bulging outward in the radial direction are provided on the outer periphery of the preliminary frame skirt.
When these ribs are press-fitted into the main frame, the spare frame skirt having an excessive circumferential length with respect to the circumferential length of the main frame skirt is radially inward at the rib. It is possible to be elastically deformed, and it is easy to elastically fit the spare frame inside the main frame.
[0011]
In a more preferred embodiment, the outer peripheral rib of the preliminary frame skirt extends to the auxiliary frame fitting support cylinder, and the outer diameter of the rib is set larger than the inner diameter of the main frame raising cylinder.
With such a configuration, when the remaining material of the main frame raising cylinder is attached to the spare frame, the remaining material is tightly fitted to the rib, and the remaining material is securely held to the spare frame.
[0012]
In a preferred embodiment, a plurality of ribs spaced in the circumferential direction are provided on the outer periphery of the main frame skirt corresponding to the ribs on the outer periphery of the preliminary frame skirt.
These ribs of the main frame allow the main frame to be elastically deformed when the auxiliary frame is press-fitted inside the main frame, and makes it easy to attach and detach the auxiliary frame to the inside of the main frame.
[0013]
Preferably, the vertical dimension of the preliminary frame is set so that the lower end surface of the main frame and the lower end surface of the preliminary frame are substantially flush with each other when the preliminary frame is fitted inside the main frame.
If comprised in this way, it becomes possible to attach and embed this combination raising frame in the manhole opening with the spare frame fitted inside the main frame, and handling of the combination raising frame becomes easy. .
[0014]
The above-described features and effects of the present invention as well as other features and effects will be further clarified as the following examples are described.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described with reference to the accompanying drawings, which illustrate non-limiting examples.
Referring to FIG. 2, a combination raising frame 10 of the present invention for raising a manhole in a septic tank is composed of a main frame 12 and a spare frame 14.
As shown in FIG. 2A, the main frame 12 and the spare frame 14 are designed so that the spare frame 14 can be detachably stored inside the main frame 12 and slightly compressed when not in use. Accordingly, the spare frame 14 has a slightly smaller outer diameter than the main frame 12.
The main frame 12 and the spare frame 14 can be formed by, for example, blow molding of vinyl chloride resin.
[0016]
The main frame 12 includes a skirt 16 that can be fitted into a manhole port (indicated by reference numeral 2 in FIG. 1) of the septic tank, and a raising cylinder 18 that rises up to a predetermined height integrally from the skirt 16. ing.
Since the spare frame 14 must be accommodated inside the main frame 12 when not in use, the inner diameter of the skirt 16 must naturally be larger than the inner diameter of the spare frame 14.
However, in order to fit the skirt 16 to the manhole port 2 of the septic tank as closely as possible, the inner diameter dimension of the skirt 16 is preferably as close as possible to the outer diameter dimension of the manhole port 2.
Accordingly, in order to allow the skirt 16 to be fitted into the manhole port 2 of the septic tank sufficiently well while allowing the spare frame 14 to be housed inside the main frame, the inner diameter of the spare frame skirt in the free state The dimensions are approximately equal to the outer diameter of the septic tank manhole port, and the inner diameter of the main frame skirt in the free state is set slightly smaller (for example, 1 to 2 mm) than the corresponding outer diameter of the spare frame skirt in the free state. To do.
[0017]
The spare frame 14 includes a skirt 22 and a short fitting support cylinder 24 that rises integrally from the skirt 22.
The skirt 22 of the preparatory frame 14 has an inner cross-sectional profile and dimensions that allow it to fit snugly into the manhole port 2 of the septic tank.
[0018]
As can be clearly seen from the enlarged sectional view of FIG. 3, the skirt 22 of the preliminary frame 14 is engaged with the tapered portion 32 for engaging with the tapered side surface of the manhole port 2 of the septic tank and the upper end surface of the manhole port 2 of the septic tank. A step portion 34 is provided for mating. The step 34 is placed on the upper end surface of the manhole port 2 of the septic tank so that the load of the spare frame 14 is supported by the septic tank, and the tapered portion 32 is engaged with the tapered side surface of the manhole port 2 so It is positioned in the radial direction with respect to it.
[0019]
The cross-sectional shape of the skirt 16 of the main frame 12 is the same as the cross-sectional shape of the skirt 22 of the preliminary frame 14 shown in FIG. 3 and is similar to the latter.
That is, as shown in the figure, a step is also provided at the upper end of the skirt 16 of the main frame 12 for placement on the manhole port 2 of the septic tank. Correspondingly, the lower portion of the raising cylinder 18 is tapered downward so that the stepped portion of the skirt 16 and the raising cylinder 18 are integrally connected.
The height of the raising cylinder 18 can be set to 300 mm, for example.
For reinforcement, the raising cylinder 18 is formed into a corrugated shape as shown.
[0020]
As shown in FIG. 2, the main frame 12 has the same thickness as the skirt and is spaced at equal intervals in the circumferential direction across the stepped portion at the top of the skirt 16 and the tapered portion at the bottom of the raising cylinder 18. For example, six ribs (bulging portions) 20 are provided.
Corresponding to the ribs 20 of the main frame 12, the spare frame 14 is also provided with, for example, six ribs 36 spaced apart at equal intervals in the circumferential direction. The cross-sectional shape of the rib 36 will be better understood from FIG. The ribs 36 of the preliminary frame 14 are extended to the support cylinder 24 for fitting. The ribs 20 of the main frame 12 and the ribs 36 of the preliminary frame 14 are formed in a similar shape so as to be fitted to each other.
The first function of the rib 36 of the preliminary frame 14 is that when the remaining material of the raising cylinder 18 is fitted to the preliminary frame 14 as shown in FIG. Thus, the remaining material is firmly supported by the spare frame 14. Therefore, the outer diameter of the rib 36 of the preliminary frame 14 is set to be slightly larger than the minimum inner diameter of the corrugated raising cylinder 18.
[0021]
Another important function of the ribs 20 and 36 is to detachably and elastically position and store the spare frame 14 inside the main frame 12, which will be described in more detail later.
Another function of the ribs 20, 36 is to reinforce the skirts 16, 22.
[0022]
Prior to use, the combined raising frame 10 of the present invention can be transported and stored with the spare frame 14 fitted inside the main frame 12, as shown in FIG. .
As described above, when the inner diameter dimension of the main frame skirt 16 in the free state is set to be, for example, 2 mm smaller than the outer diameter dimension of the spare frame skirt 22 in the free state, the preliminary frame 14 is press-fitted inside the main frame 12. Sometimes, it will not be possible to press fit the reserve frame 14 inside the main frame 12 unless the reserve frame 14 is compressed by 2 mm in the diameter direction relative to the main frame 12.
However, since the main frame 12 and the spare frame 14 are provided with ribs 20 and 36, respectively, when the spare frame 14 is press-fitted into the main frame 12, the main frame 12 and the spare frame 14 are excessively long in the circumferential direction. The squeezed toward the ribs 20 and 36 due to elastic deformation allows the preliminary frame 14 to be compressed in the diametrical direction with respect to the main frame 12.
In this way, the spare frame 14 is fitted in the compressed state in the main frame 12 and positioned reliably.
In this way, a plurality of combination raised frames 10 can be stacked in multiple stages in a state where the main frame 12 and the spare frame 14 are fitted, and transportation and inventory management can be easily performed.
[0023]
In use, the main frame 12 and the spare frame 14 can be separated and used, for example, from the main frame 12 first.
According to the embedding depth of the manhole port of the septic tank, as shown in FIG. 4, the raising cylinder 18 of the main frame 12 is cut along a cutting line 26 having an appropriate height. The main frame 12A whose height is adjusted by cutting is attached to the manhole port 2 in the manner shown in FIG. 1 and used for raising the manhole frame.
[0024]
The remaining material 28 obtained by cutting the raising cylinder 18 of the main frame 12 along the cutting line 26 is used for raising other manholes in the same or other septic tanks by combining with the spare frame 14. Can do.
That is, after cutting the remaining material 28 to an appropriate height as necessary, it is fitted into the fitting support cylinder 24 of the preliminary frame 14 as shown in FIGS. 30 is configured and can be used for raising other manholes.
[0025]
Although specific embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various changes and modifications can be made. Such embodiments also belong to the scope of the present invention. For example, the shape and dimensions of the skirt can be changed as appropriate. The presence / absence of ribs and corrugations, and the shape / dimensions can be changed as appropriate.
If the spare frame is unnecessary, it is possible to embed the spare frame inside the main frame while leaving it behind.
[0026]
【The invention's effect】
According to the present invention, it is possible to cope with a wide range of height adjustments simply by preparing one type of combination raising frame as an inventory, so that inventory management can be greatly simplified.
Another advantage of the present invention is that the remaining material generated by cutting can be used effectively, and industrial waste can be minimized.
In addition, since the combination raising frame of the present invention can be transported and stored with the spare frame fitted inside the main frame, the basket can also handle the two raising frames as one, and can be transported and stocked. Management can be facilitated.
Furthermore, unlike the conventional screw-type raising frame, the combined raising frame of the present invention can be cut obliquely, and thus has an advantage that it is easy to take a draining gradient.
See paragraphs “0009” to “0013” for other effects of the present invention.
[Brief description of the drawings]
FIG. 1 shows how the septic tank manhole is raised to different levels.
2A is a cross-sectional view showing a state where a main frame and a spare frame of a combination raising frame of the present invention are fitted, and FIG. 2B is a perspective view showing a state where the main frame and the spare frame are separated.
3 is a cross-sectional view taken along line III-III in FIG.
FIG. 4 is a perspective view showing that the main frame of the combination raising frame of the present invention is cut and the remaining material is used as a spare frame.
FIG. 5 is a cross-sectional view showing a state in which the remaining material of the main frame is fitted into a spare frame.
[Explanation of symbols]
10: Combination raising frame 12: Main frame 14: Preliminary frame 16: Main frame skirt 18: Main frame raising cylinder 20: Main frame rib 22: Preliminary frame skirt 24: Preliminary frame fitting support cylinder 28: Main frame remaining material 36: spare frame ribs

Claims (6)

A main frame comprising a skirt that can be fitted into a manhole port of the septic tank, and a raising cylinder that rises integrally from the skirt to a predetermined height;
In order to fit and support a spare frame skirt that can be fitted into the manhole port of the septic tank and that can be detachably stored inside the skirt of the main frame, and the remaining material cut from the raising cylinder of the main frame A preliminary frame provided with a support cylinder for fitting rising from the preliminary frame skirt by a limited length integrally;
Raising frame of the septic tank manhole consisting of a combination.   The inner diameter dimension of the main frame skirt in the free state is set to be slightly smaller than the outer diameter dimension of the corresponding spare frame skirt in the free state. The raised frame according to claim 1, characterized in that is fitted into the main frame skirt. A plurality of circumferentially spaced ribs are provided on the outer periphery of the fitting support cylinder of the spare frame, so that the spare frame skirt can be easily elastically deformed radially inward when the spare frame is press-fitted inside the main frame. The raised frame according to claim 2, wherein the raised frame is configured as follows.   The outer diameter of the rib of the spare frame is set to be larger than the inner diameter of the main cylinder for raising the main frame. 4. Raising frame according to claim 3, characterized in that it is an interference fit. Raising frame based on claim 3 or 4, characterized in that a plurality of ribs spaced circumferentially in the lower portion of the outer periphery of the elevating cylinder for the main frame so as to correspond to the rib of the preliminary frame.   The vertical dimension of the preliminary frame is set so that the lower end surface of the main frame and the lower end surface of the preliminary frame are positioned substantially on the same plane when the preliminary frame is fitted inside the main frame. Raised frame based on any one of claims 1-5.

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