JP2019007222A - Underground structure capable of adjusting height - Google Patents

Abstract

To provide an underground structure capable of adjusting a height, in adjusting a height after an installation, in which: a housing to be lifted up and down can be rotated without removing sediment around the housing to be lifted up and down; a housing to be lifted up and down does not settle due to vibration and the like; a manual installation work is possible without using a lifting device such as a jumbo, and which can easily cope with a sloped road.SOLUTION: A cast housing 22 with female screws including a lid receiving frame portion 23 is screwed with an upper part of a cast housing 21 with male screws whose flange portion 21a is fixed to a manhole side block 20. A pitch of screw threads P, Q of the housing 21 with male screws and the hosing 22 with female screws are formed to be large. A wedge 24 is driven into a clearance R between the upper part of the housing 21 with male screws and the hosing 22 with female screws. An earth pressure receiving cylindrical body 25 is disposed at an outside of the hosing 22 with female screws.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an underground structure that can be adjusted in level, such as level adjustment, raising and lowering, such as a manhole for water and sewage and a valve housing.

  Conventional underground structures such as manhole covers for waterworks and sewers are installed in the field or when there is a step between the road surface and the upper surface of the cover frame after installation, the manhole side lump and manhole are made to match the level of the road surface. The height adjustment spacer is inserted, removed, or replaced between the lid receiving frames, and the adjustment mortar for fine adjustment of the height is placed. These operations require labor and work days including the curing period. Therefore, the construction cost has been a problem.

  Also, when raising and lowering after installing the underground structure, earth pressure is applied to the side of the lid receiving frame, so the lid receiving frame cannot be removed as it is, so remove the road pavement around the lid receiving frame. After the height adjustment work, the surrounding road surface must be paved again. Therefore, the work, labor and cost are enormous, which is a big problem in the snowfall region.

  In addition, although a screw-type valve housing is used as a valve housing for underground structures, earth pressure is applied to the outside of the elevating housing with the lid receiving frame after the installation of the screw-type valve housing. As in the case of raising and lowering the manhole cover frame, it is necessary to remove and re-pave the road pavement around the elevating housing, and the labor and cost of the work are problematic.

  Further, since the valve casing is made of a casting, it is very heavy and requires lifting equipment such as a yumbo during transport and installation work, and it is necessary to prepare valve casings having different heights.

  Furthermore, since the screw type valve housing has a large thread pitch, it is easy to loosen due to vibration and the elevating housing tends to sink.

Japanese Patent Laid-Open No. 9-19529 Japan Water Works Association Standard JWWA Water Screw Valve Enclosure Japan Water Works Association issued on June 8, 2000

  Therefore, as a result of various studies, the knowledge that the above problem can be solved by making the underground structure a structure in which a male screw housing and a female screw housing provided with a lid receiving frame are screwed together is improved. Therefore, the solution is proposed here. By improving the latter screw-type valve housing, we have found that the first and second problems can be solved, and that the third and fourth problems can be solved. This is a proposal.

  In the present invention, when the height after installation is adjusted, the lifting / lowering housing can be rotated without removing the earth and sand around the lifting / lowering housing provided with the lid receiving frame. To provide a height-adjustable underground structure that does not sink. It is another object of the present invention to provide an underground structure that can be manually installed without using a lifting device such as a yumbo, and that can be easily adjusted even for sloped roads. It is.

  SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the invention according to claim 1 provides a cast male screw housing provided with a male screw on an upper portion and a female screw engaged with the male screw on a lower portion. And a casting elevating casing provided with a lid receiving frame on the upper part, and the pitch of the thread is increased, a wedge is inserted in the gap between the upper part of the male screw casing and the elevating casing, and the elevating A height-adjustable underground structure characterized in that an earth pressure receiving cylinder is disposed outside the housing.

  The invention described in claim 2 comprises a cast lower housing, a plastic intermediate housing, and a cast screw housing, the screw housing having a male screw on the outer surface, and an inner surface. It is composed of an elevating casing provided with a female screw at the lower part and a lid receiving frame part at the upper part, and the pitch of the screw thread is increased, and an earth pressure receiving cylinder is arranged outside the elevating casing, and the male screw A height-adjustable underground structure in which a wedge is inserted into a gap between an upper portion of the housing and the elevating housing.

  The invention described in claim 3 is composed of a cast lower housing, a plastic intermediate housing, and a cast screw housing, and the screw housing has a male screw housing provided with a male screw on the outer surface, and an inner surface. It is composed of an elevating casing provided with a female screw at the lower part and a lid receiving frame part at the upper part, and the pitch of the screw thread is increased, and an earth pressure receiving cylinder is arranged outside the elevating casing, and the male screw Inserting a wedge into the gap between the upper part of the case and the lifting case, further increasing the joint between the screw case and the intermediate case, and providing a bolt for fixing the intermediate case at the joint It is an underground structure with adjustable height.

  As the earth pressure receiving cylinder, a plastic cylinder, for example, a hard vinyl chloride pipe or a bellows-like metal pipe is used, and a hard vinyl chloride pipe is preferable as the plastic intermediate casing.

  According to the first aspect of the present invention, since the earth pressure receiving cylindrical body is disposed outside the lifting / lowering casing, the rotary tool can be removed by removing the wedge without removing the sand around the lifting / lowering casing as in the prior art. Thus, the elevating housing can be easily raised and lowered, and by inserting the wedge again, the elevating housing can be prevented from sinking due to vibration or the like.

  The invention described in claim 2 can achieve the same effect as that of the invention described in claim 1, and is a cast elevator casing having a cast lower casing, a plastic intermediate casing, and a lid receiving frame portion. It is composed of five members, a cast male screw housing and earth pressure receiving cylinder, which can be assembled or separated, so that it can be assembled and installed only by human power without using a lifting device such as a yumbo. There is an advantage that work can be done. In addition, when the intermediate housing is made of, for example, a hard vinyl chloride pipe, the hard vinyl chloride pipe can be easily cut with a cutter. can do. Therefore, it is not necessary to prepare a large number of dedicated intermediate casings having different lengths, which is useful for inventory management. Further, since the hard vinyl chloride pipe is lighter than the case where the intermediate casing is made of cast metal or steel pipe, there is an effect of improving the efficiency of installation work.

  The invention described in claim 3 not only provides the same effects as those of the invention described in claims 1 and 2, but also has a larger joint portion with the intermediate casing of the screw casing. By cutting along the slope of this, connecting to a screw housing, and fixing with bolts, there is an advantage that it can be quickly handled as a valve housing for a road with a slope.

It is a longitudinal cross-sectional view of Example 1 of this invention. It is a longitudinal cross-sectional view of Example 2 of this invention. It is a longitudinal cross-sectional view of Example 3 of the present invention. It is a top view of Example 3 of the present invention. An example of the instrument used in Example 3 of this invention is shown, (a) is a tool for driving a wedge, (b) is a turning tool of a raising / lowering housing | casing, (c) is a jack. It is a longitudinal cross-sectional view of Example 4 of this invention.

  FIG. 1 is a longitudinal sectional view of an embodiment in which the invention according to claim 1 is applied to a manhole for water supply and sewerage, in which 20 is a manhole side lump and 21 is a flange portion 21 a fixed to the manhole side lump 20. This is a cast male screw housing. Reference numeral 22 denotes a cast female screw housing which is screwed into the male screw housing 21, and a lid receiving frame portion 23 of an iron lid 26 is provided on the upper portion.

  The pitches of the screw threads P and Q provided in the male screw housing 21 and the female screw housing 22 are formed large, and a gap R is formed between the upper portion of the male screw housing 21 and the female screw housing 22. Reference numeral 24 denotes a wedge driven into the gap R.

  Reference numeral 25 denotes a soil pressure receiving cylinder, which uses a hard vinyl chloride pipe in the embodiment and is disposed outside the female screw housing 22. Therefore, when the wedge 24 is pulled out from the gap R, the female screw housing 22 that is not affected by the earth pressure is provided with a turning tool 23a provided on the lid receiving frame 23 with a turning tool as shown in FIG. The level can be made to coincide with the road surface GL by engaging with 23a and rotating, and the wedge 24 can be driven again into the gap R to prevent the female screw housing 22 from being lowered due to vibration. A plurality of wedges 24 are preferably driven into the gap R.

  As described above, the water and sewage manhole according to the first embodiment is provided with the earth pressure receiving cylinder 25 so that the female screw housing 22 is not affected by the earth pressure. Therefore, it is possible to quickly raise and lower the construction. And since the removal of the surrounding road surface pavement and re-paving, the curing days, etc. are unnecessary like the past, a construction period can be shortened and a construction cost can be reduced significantly.

  FIG. 2 is a longitudinal sectional view of an embodiment in which the invention according to claim 1 is applied to a valve housing of a gate valve, wherein 21 is a cast male screw housing with a male screw P provided on the upper portion, and 22 is a lid on the upper portion. A female screw housing provided with a receiving frame portion 23 and screwed into the male screw housing 21 has a large thread pitch.

  Reference numeral 23 denotes a wedge driven into a gap R formed between the upper part of the male screw housing 21 and the female screw housing 22; Arranged outside.

  Therefore, when the wedge 24 is pulled out, the female screw housing 22 is not affected by the earth pressure, so that the rotating tool shown in FIG. 5B is engaged with the latching portions 23 a and 23 a provided in the lid receiving frame portion 23. Thus, the road surface GL and the level can be positioned by rotating and the wedge 24 can be driven into the gap R again to prevent the female screw housing 22 from being lowered due to vibration. A plurality of wedges 24 are preferably driven into the gap R.

  As described above, the valve housing shown in the second embodiment does not need to be removed and re-paved around the elevating housing as in the conventional case when performing raising and lowering work after installation. The labor and cost can be reduced.

  FIG. 3 is a longitudinal sectional view of an embodiment in which the invention according to claim 2 is applied to a valve casing of a gate valve, and FIG. 4 is a plan view thereof. The third embodiment improves the second embodiment and improves usability.

  3 and 4, reference numeral 1 denotes a lower casing made of casting, 2 an intermediate casing made of a hard vinyl chloride pipe, and 3 a screw casing made of casting.

  The screw housing 3 includes a male screw housing 3a having a male screw P on the outer surface and an elevating housing 3b having a female screw Q on the lower inner surface. The pitch of the screw thread is increased. The thread h between the lower thread and the lower female thread Q is approximately 3 cm.

  A lid receiving frame portion 4 is formed at the upper part of the elevating housing 3b, and hook-like jack engaging portions 6 and 6 provided with pivot engaging portions 5 and 5 with notches on both sides are provided. ing. In the figure, 7 is a tether stop for a lid (not shown), and 8 is a wedge.

  The lower portion of the intermediate housing 2 is fitted to the outside of the protruding portion 1a projecting from the upper portion of the lower housing 1, and the upper portion is fitted into a connecting portion 3a 'provided at the lower portion of the male screw housing 3a.

  Next, the installation procedure in the field of the screw type valve housing shown in Example 3 will be described. First, the lower housing 1 is installed, then the intermediate housing 2 made of a long hard vinyl chloride tube prepared in advance is cut to an appropriate length on the site, and then the lower end is formed on the protrusion 1a of the lower housing 1 After being fitted and fixed with bolts (not shown) as necessary, the periphery of the intermediate housing 2 is backfilled and rolled, and then the screw housing 3 is connected to the intermediate housing 2.

  When the upper surface of the lid receiving frame part 4 does not coincide with GL, both ends of the hooking part 10a of the rotary tool 10 illustrated in FIG. 5B are engaged with the rotary engaging parts 5 and 5 of the elevating housing 3b. At the same time, the elevating housing 3b is rotated and finely adjusted, and the upper surface of the lid receiving frame portion 4 is made to coincide with GL. After this operation is completed, the wedge 8 is screwed into the lower end of the wedge driving tool 11, and the wedge 8 is driven into the gap between the upper portion of the male screw housing 3 a and the lifting housing 3 b, and the wedge driving tool 11 is inserted from the wedge 8. After removing the earth pressure receiving cylinder body 9 on the outside of the elevating housing 3b, the surroundings of the earth pressure receiving cylinder body 9 are backfilled, and asphalt pavement is applied after rolling, thereby completing the installation work of the valve housing.

  The procedure of this installation work is not limited to the procedure described above, and for example, a construction in which the intermediate housing 2 is attached to the lower housing 1 in advance may be installed first. Further, in this embodiment, a method of cutting a long hard vinyl chloride tube to an appropriate length in the field is used as the intermediate casing 2, but the intermediate casing 2 having a predetermined length may be used. Of course it is good.

  In the above, the procedure in the case of installing only by human power without using a lifting device such as a yumbo, which is an advantage of the present invention, has been described. However, like a conventional screw type valve housing, a valve housing assembled as a single unit is lifted. You may make it install using an instrument.

  For some reason, it may be difficult to rotate the elevating housing 3b with the rotating tool 10 for raising and lowering. In this case, for example, the jack 12 shown in FIG. 5C is used, and both ends of the hooking portion 12a are engaged with the jack engaging portions 6 and 6 of the lid receiving frame portion 4, and h (in the embodiment, about The lifting / lowering housing 3b is pulled up by 3 cm). If it does in this way, rotation of the raising / lowering housing | casing 3b will be attained and the height adjustment for raising and lowering can be performed.

  Embodiment 4 is an embodiment of a valve housing that can be used even when the GL has a gradient, and FIG. 6 is a longitudinal sectional view thereof.

  The fourth embodiment is the same as the third embodiment in that the lower casing 1 made of casting, the intermediate casing 2 using a hard vinyl chloride tube, and the screw casing 3 made of casting are the same as the third embodiment. 3 is different in that the connection portion 3a ′ of FIG. 3 is made larger, the pocket is made larger, and the upper portion of the intermediate housing 2 is fixed with a bolt 13.

  Since the valve housing of the fourth embodiment is configured as described above, when the GL is installed in a place with a gradient, the upper end of the intermediate housing 2 is cut along the gradient of the GL, and the connection portion 3a ′ is engaged. In addition, by fixing with bolts 13 and 13, a valve housing in the case where there is a gradient in GL can be easily provided, and it is a convenient and useful valve housing.

  As is clear from the description of the above embodiment, according to the first aspect of the present invention, even if earth pressure is applied to the outside of the elevating housing 3b, the earth pressure receiving cylinder 9 is provided to the outside of the elevating housing 3b. Therefore, it is possible to rotate easily by removing the wedge 8, and therefore, it is not necessary to remove the earth and sand around the elevating housing 3b as in the conventional screw type valve housing. It is possible to shorten the number of days for the bulking work. Further, according to the inventions of claims 2 and 3, the installation work can be performed only by human power, and a valve housing having a required height can be provided more easily and easily than a conventional screw type valve housing, Adjustment and repair work can be carried out quickly, it is easy to use and its practical value is great.

  Furthermore, when the valve casing shown in the third embodiment is installed on a road with a slope. Since it must be installed at an incline, it takes time for installation work, but in the valve casing of the fourth embodiment according to the invention described in claim 3, by cutting along the slope of the upper end of the intermediate casing and the road Since it is possible to cope with it, construction time can be shortened, and its practical value is great.

DESCRIPTION OF SYMBOLS 1 Lower housing | casing 1a Protrusion part 2 Intermediate | middle housing | casing 3 Screw housing | casing 3a Male screw housing | casing 3b Lifting housing | casing 4 Lid receiving frame part 5 Rotating engaging part 6 Jack engaging part 7 Anchoring rope stopper 8 Wedge 9 Earth pressure receiving cylinder DESCRIPTION OF SYMBOLS 10 Rotating tool 10a Hook part 11 Wedge driving tool 12 Jack 12a Hook part 13 Bolt 20 Manhole side lump 21 Male screw housing 21a Flange portion 22 Female screw housing 23 Lid receiving frame portion 24 Wedge 25 Earth pressure receiving cylinder 26 Iron lid

Claims (3)

It consists of a cast male screw housing with a male screw at the top, and a cast lifting housing with a female screw to be screwed to the male screw at the bottom and a lid receiving frame on the top. And a height-adjustable basement characterized in that a wedge is inserted into a gap between the upper part of the male screw housing and the lifting housing, and an earth pressure receiving cylinder is disposed outside the lifting housing. Structure. It consists of a lower casing made of casting, an intermediate casing made of plastic, and a screw casing made of casting. The screw casing has a male screw casing with a male screw on the outer surface, a female screw at the lower part on the inner surface, and an upper part. And an elevating housing provided with a lid receiving frame portion, the pitch of the threads is increased, an earth pressure receiving cylinder is disposed outside the elevating housing, and the upper portion of the male screw housing and the elevating housing An underground structure with adjustable height, characterized by inserting wedges in the gap between them. It consists of a lower casing made of casting, an intermediate casing made of plastic, and a screw casing made of casting. The screw casing has a male screw casing with a male screw on the outer surface, a female screw at the lower part on the inner surface, and an upper part. And an elevating housing provided with a lid receiving frame portion, the pitch of the threads is increased, an earth pressure receiving cylinder is disposed outside the elevating housing, and the upper portion of the male screw housing and the elevating housing Adjustable height, characterized by inserting wedges in the gaps between them, enlarging the joint of the screw housing with the intermediate housing, and providing a bolt for fixing the intermediate housing at the joint Underground structure.

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