JP2017166242A - Jack device for underground structure lid receiving frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a jack device with a simple structure, which can easily remove an inner cylindrical body of a lid receiving frame formed of an outer cylindrical body and the inner cylindrical body and can be easily handled.SOLUTION: A jack device for underground structure lid receiving frame comprises: a construction base slab 6, which is constructed at an inner bottom base part 2a of an outer cylindrical body 2 of a lid receiving frame A formed of the outer cylindrical body 2 and an inner cylindrical body 3; and a strip-like lifting slab 7, which is screwed with a screw rod 8 at a center part and has a length to allow a lower surface of a convex edge 3a formed inside the inner cylindrical body 3 to be engaged with both ends of the lifting slab. An ornamental hairpin-shaped handle 9 is installed on a head 8a of the screw rod 8. The lifting slab 7 can be vertically moved up or down by rotating the screw rod 8 using the handle 9.SELECTED DRAWING: Figure 1

Description

  The present invention is for a lid receiving frame composed of an outer cylinder body and an inner cylinder body in a lid receiving frame of an underground structure, for example, a manhole for water supply and sewerage, or a valve casing lid for a gate valve or a water control valve in a water supply facility. The present invention relates to a jack device.

  The cover frame of the underground structure is provided with a flange to be attached to the manhole side lump or to be supported by an annular support plate. Work to insert, remove or replace under the flange. However, in the construction, the spacer adjustment work cannot be done unless the area around the lid receiving frame is dug up greatly, and the raising or lowering work takes time and work days including the curing period. It was.

  As a lid receiving frame for solving this problem, there has been proposed a structure in which a lid receiving frame is constituted by an outer cylindrical body and an inner cylindrical body, and the inner cylindrical body is moved up and down by an appropriate number of jack bolts arranged around it. Since the plurality of jack bolts have to be rotated, it takes time to adjust the spacers.

JP-A-9-209420 Japanese Patent No. 3622098

  Accordingly, the present invention is intended to provide a jack device that is simple in structure and easy to use so that the inner cylinder of the cover receiving frame including the outer cylinder and the inner cylinder can be easily removed.

  The present invention has been made to solve the above problems, and the invention according to claim 1 is a lid receiving frame comprising an outer cylinder and an inner cylinder installed on an underground structure. A projecting base plate installed on the inner bottom base portion of the outer cylindrical body or an underground structure provided below, and a screw threaded at the center and having a length provided inside the inner cylindrical body A lid receiving frame jack device comprising a lower plate of an edge and an upright plate having a length with which both ends engage.

  According to a second aspect of the present invention, there is provided a lid receiving frame jack device characterized in that the installation base plate is formed in a strip shape.

  According to a third aspect of the present invention, there is provided a lid receiving frame jack device characterized in that the erection base plate has a cross shape.

  According to a fourth aspect of the present invention, there is provided a lid receiving frame jack device characterized in that the construction base plate is circular.

  A fifth aspect of the present invention is a lid receiving frame jack device according to the first to fourth aspects of the present invention, wherein a gripping portion is provided on the installation base plate.

  A sixth aspect of the present invention is the lid receiving frame jack device according to any one of the first to fifth aspects, wherein a recess that engages with a lower end of the screw rod is provided at the center of the installation base plate. is there.

  According to the first aspect of the invention, if the single screw rod is rotated, the inner cylinder body of the lid receiving frame can be raised and easily removed from the outer cylinder body, so that the spacer adjustment work is shortened. There is an effect.

  According to the second and third aspects of the invention, the installation base plate and the upright plate can be quickly inserted into predetermined positions of the lid receiving frame.

  According to the invention described in claim 4, during the jacking work, the circular erection base plate serves as a lid, so that the earth and sand can be prevented from falling into the underground structure.

  According to the fifth aspect of the present invention, it is possible to easily attach and detach the erection base plate due to the presence of the grip portion.

  According to the invention described in claim 6, since the lower end of the screw rod is positioned, there is an effect of preventing the screw rod from swinging.

It is a longitudinal cross-sectional view of Example 1 of this invention. It is a perspective view of the erection base plate and the upright plate in Example 1 of the present invention. It is a perspective view of the erection base plate and the upright plate in Example 2 of the present invention. It is a perspective view of the construction base plate and the upright plate in Example 3 of the present invention.

  1 is a longitudinal sectional view of a first embodiment of the present invention, FIG. 2 is a perspective view of an installation base plate and a top plate, 1 is a valve housing made of hard vinyl chloride, 2 is an outer cylinder of a lid receiving frame A, 3 Is the inner cylindrical body of the lid receiving frame A, 4 and 5 are spacers, 6 is an installation base plate laid on the inner bottom base portion 2a or the ring-shaped spacers 4 and 5 of the outer cylindrical body 2, and 7 is a screw in the center. This is a strip-shaped saddle plate having a length in which both ends engage with the lower surface of the protruding edge 3a provided in the inner cylindrical body 3 by screwing the flange 8.

  A hook-shaped handle 9 is detachably attached to the head 8 a of the screw rod 8, and a steady-state recess 6 a that engages with the lower end of the screw rod 8 is provided at the center of the installation base 6. It has been.

  Next, for example, the case where the upper surface of the inner cylinder 3 of the lid receiving frame A protrudes from the road surface and the spacer 5 is to be replaced with another spacer will be described. First, as shown in FIG. Then, hold the handle 9 and rotate the screw rod 8 so that the upper plate 7 is lowered from the position shown in FIG. Engage with the recess 6 a of the erection base plate 6, and then hold the upper plate 7 by hand so that it does not rotate with the screw rod 8, and rotate the screw rod 8. In this way, the upper plate 7 is raised, and the inner cylinder 3 is pushed up by the upper plate 7, so that the inner cylinder 3 can be extracted from the outer cylinder 2.

  After extracting the inner cylinder 3 from the outer cylinder 2, the upper surface of the inner cylinder 3 can be made to coincide with the road surface by replacing the spacer 5 with an appropriate spacer and inserting the inner cylinder 3 again. .

  It is not necessary when the aperture is small like the valve housing of the gate valve, but in the case of a lid receiving frame with a large aperture, although not shown here, as in the known lid receiving frame, a connecting bolt that integrates the inner and outer cylindrical bodies Of course.

  In Example 1, since the recessed part 6a engaged with the lower end of the screw rod 8 is provided in the erection base plate 6, the jack function can be exhibited smoothly and quickly without the screw rod 8 swinging. Compared to the case where several jack bolts are rotated as in the prior art, it is easy to operate because only one screw rod 8 needs to be rotated, and the number of components is reduced. Since it is not necessary to provide a bolt, the number of parts of the lid receiving frame can be reduced. Therefore, it is of great practical value as a jack apparatus for a lid receiving frame comprising an inner and outer cylindrical body.

  In this embodiment, due to the structure of the outer cylinder 2, the installation base 6 is installed on the inner bottom base portion 2 a of the outer cylinder 2, but the installation base 6 is installed below the upper plate 7. As a matter of course, it is needless to say that the installation base 6 is not limited to the inner bottom base such as a seat plate or a valve casing upper end.

  As described above, in the first embodiment described above, the screw rod 8 is rotated by the handle 9 attached in a bowl shape, but a + or-groove or a square recess is provided on the top of the head 8a. Alternatively, the head 8a can be formed into a square shape and rotated with an electric screwdriver. According to this rotation method, the upper plate 7 can be moved up and down quickly, and the working time can be further shortened.

  FIG. 3 shows a perspective view of Embodiment 2 of the present invention. The erection base plate 6 ′ has a cross shape, and a ring-shaped protrusion 6′a that engages with the lower end of the screw rod 8 at the center. It is provided. Since the usage in the second embodiment is the same as that in the first embodiment, the description thereof is omitted.

  Although Examples 1 and 2 have the advantage of being excellent in installation on the lid receiving frame, earth and sand may fall into the underground structure during the spacer attaching / detaching operation. Then, Example 3 which improved the problem next is illustrated.

  FIG. 4 shows a perspective view of the third embodiment of the present invention, wherein 6 ″ is a circular erection base plate, 10 and 10 are bolts and nuts inserted through an insertion hole provided in the erection base plate 6 ″ so as to be raised and lowered. It is a gripping part.

  Examples 1 and 2 are excellent in terms of simple installation on the lid receiving frame, but earth and sand may fall into the underground structure during the spacer attaching / detaching operation. According to the third embodiment, since the installation base 6 ″ is circular, the opening is closed as a cover of the underground structure, so that the earth and sand are prevented from falling into the underground structure during the spacer replacement operation. I can do it.

  In the third embodiment, when the installation base 6 ″ is taken out from the lid receiving frame A after the inner cylinder 3 is removed from the outer cylinder 2, the bolt heads of the gripping portions 10, 10 are pulled, The installation base 6 "can be taken out by grasping the exposed part.

  The gripping part is composed of bolts and nuts that move up and down. Of course, other structures may be used, and when there is no risk of earth and sand falling down, the gripping part is a hole for inserting a finger. It is good.

  In addition, the shape of the upright plate or the erection base plate is not limited to the shape of the above-described embodiment, and a grip portion may be provided in the erection base plate of the first and second embodiments.

A Cover frame 1 Valve casing 2 Outer cylinder 2a Inner bottom base 3 Inner cylinders 4, 5 Spacer 6 Installation base plate 7 Upper plate 8 Screw rod 8a Head 9 Handle 10 Grasping part

Claims (6)

In a lid receiving frame comprising an outer cylinder and an inner cylinder installed on an underground structure, an installation base installed on the inner bottom base of the outer cylinder or the underground structure provided below the inner cylinder A lid comprising: a plate; and a plate having a length in which a lower surface of a projecting edge provided in the inner cylindrical body is engaged with both ends and a screw plate is screwed at the center. Jack device for receiving frame. A jack device for a lid receiving frame, wherein the installation base plate is formed in a strip shape. A lid receiving frame jack device characterized in that the installation base plate has a cross shape. A jack device for a lid receiving frame, wherein the installation base plate is circular. 5. The lid receiving frame jack device according to claim 1, wherein a gripping portion is provided on the installation base plate. 6. The lid receiving frame jack device according to claim 1, wherein a concave portion that engages with a lower end of a screw rod is provided in the center of the installation base plate.

Images