JP7290463B2 - Jigs for prefabricated buried boxes such as handholes and manholes, and methods for assembling prefabricated buried boxes using the jigs - Google Patents

Description

There are handholes and manholes for connecting and inspecting cables and wires for power or communication. There are also manholes for maintenance and inspection of sewage pipes. The present invention relates to a jig for use in assembling a prefabricated buried box such as a handhole and a manhole, and a method for assembling a prefabricated buried box using the jig.

The prefabricated type handholes and manholes are assembled by stacking block-shaped members from below in a hole dug in the ground surface. During construction, each component is assembled using a crane.

The joint surface of the upper end of each member is attached with a sealing material with an adhesive for stopping water, and once joined, it cannot be removed. Therefore, if the member to be overlaid is displaced from the predetermined position, the sealing material must be attached again, which is very troublesome. In addition, when the worker puts his/her hand near the joint in order to align it, there is a danger of pinching a finger or the like. In addition, if the sealing material at the joints of the members is not in close contact with the joints, the waterproofing effect such as intrusion of rainwater or groundwater from the joints is lost.

Therefore, a guide for stacking the upper and lower block-shaped members has been developed. The one disclosed in Patent Document 1 is one example.

In Patent Document 1, a mounting portion detachably attached to the inner surface of an opening end of a box base located in the lower portion of a buried box such as a handhole, manhole, etc., which is assembled in upper and lower stages, and a mounting portion protruding above the opening. Assembly of handholes, manholes, etc., consisting of a connecting guide part that is linked to a predetermined hanging device and that positions the box slabs by contacting the lower inner surfaces of the box slabs that are stacked on the upper level. It is a guide hanger for a type buried box.

Utility Model Registration No. 3186436

The guide hanger in Patent Document 1 utilizes screw holes provided on the inner surface of the four corners of the box base, and the hanger is fixed with bolts screwed into the screw holes. However, some handholes and manholes do not have the screw holes. It cannot be applied to such handholes and manholes. Therefore, it does not have versatility.

In addition to Patent Document 1, there is a method of attaching a guide jig to the outside of a block-shaped member of a handhole or manhole. If the guide jig is attached to the outside, an operator must enter the inside to make adjustments, or the guide jig must be attached to the inside as well. not fragrant.

In addition, especially in the case of manholes, some of them are 3m or more in height, and in that case, the work of the upper member is a high place work (2m or more), and the worker wears a safety belt and climbs a ladder or stepladder. However, there is no support material to attach the rope of the safety belt, so the work is done in an unstable position, and there is a danger of falling. It is even more dangerous in the case of receiving a block-shaped member suspended from above by a crane.

Therefore, in order to solve the above-mentioned problems, the present invention does not apply any processing to the handhole or manhole main body, and when the cross section of the block-shaped member of the handhole or manhole is square, the four inner corners or four sides are In addition, when the cross section is circular, guide pieces can be easily attached to the inner peripheral surface, and block-shaped members to be stacked on top can be accurately aligned and connected. An object of the present invention is to provide a jig and a method for assembling an embedded box using the jig.

In the invention according to claim 1, an upper potter's wheel is fixed to the upper end of a support, three or more folding ribs extend radially from the upper potter's wheel, and each folding rib includes a rib that can be folded in three stages, a rib, a rib, When a lower potter's wheel is rotatably connected to each other and vertically slidable on the post is raised along the post, it extends radially from the lower potter 's wheel and its tip is rotatable to the main rib. The outermost tip bone of the folding umbrella has a bone configuration of a folding umbrella in which the main rib is pressed against the connected supporting bone and the elasticity of the folding bone causes the main rib, the secondary bone and the tip bone to extend outward. on the outside of all or part of the plate-shaped abutting part, a guide piece composed of a curved portion in which the upper end of the plate-shaped contact portion is curved inward, is rotatably attached, and a stand base for erecting the support is provided at the bottom of the support, The supporting post has a length adjusting part capable of expanding and contracting the height, and the lower potter's wheel can be freely fixed at an arbitrary position of the supporting post.

According to the invention of claim 2, in the assembly of a prefabricated buried box such as a handhole or manhole made by stacking block-shaped members, the jig of claim 1 is installed in the block-shaped member at the bottom of the prefabricated buried box. Then, raise the lower potter's wheel upward along the support, open a plurality of folding ribs that spread radially from the upper potter's wheel provided at the upper end of the support, and place the plate-shaped contact portion of the guide piece on the lower block-shaped member. The lower wheel is fixed in a state in which it is pressed against the inner peripheral surface of the upper end and the curved portion of each guide piece protrudes upward from the upper edge of the block-shaped member, and the upper block-shaped from the top of the block-shaped member 2. The method according to claim 1, wherein the members are hung down, the guide pieces are inserted into the inner periphery from the lower edge of the upper block-shaped member, and the upper block-shaped member is stacked on the lower block-shaped member. A method for assembling an assembled buried box using jigs for assembled buried boxes such as handholes and manholes.

In addition, in the invention of claim 3, a lower potter's wheel is fixed to the lower part of the support, three or more folding ribs extend radially from the lower potter's wheel, and each folding rib includes a rib that can be folded in three stages, a rib, a rib, When an upper potter's wheel is rotatably connected to the front bone and vertically slidably provided on the post is lowered along the support shaft, it extends radially from the upper potter's wheel and its tip is rotatably connected to the main rib. The rib structure of the folding umbrella is such that the ribs are pushed by the supporting ribs that are formed, and the ribs, the ribs, and the front ribs are extended outward by the spring force of the spring members provided on the folding ribs or the elasticity of the folding ribs. It has a bone structure turned upside down, and a guide piece consisting of a curved portion in which the upper end portion of a plate-like contact portion curves inward is rotatably placed on the outside of all or part of the outermost tip bone of the folded bone. , a stand frame for standing up the support is provided at the bottom of the support, the support has a length adjustment part that can expand and contract the height, and the upper potter's wheel can be freely fixed at any place on the support. Jig for prefabricated buried boxes such as holes and manholes.

Further, according to the invention of claim 4, in assembling a prefabricated buried box such as a handhole or manhole made by stacking block-shaped members, the jig of claim 3 is placed in the block-shaped member under the prefabricated buried box. , the upper potter's wheel is lowered along the support, a plurality of folding bones radiating from the lower potter's wheel provided at the bottom of the support are opened, and the plate-shaped contact part of the guide piece is attached to the lower block-shaped member The upper potter's wheel is fixed in a state in which the upper end is pressed against the inner peripheral surface and the curved portion of each guide piece protrudes upward from the upper end edge of the block-shaped member, and the block above the block-shaped member 4. The method according to claim 3, wherein the upper block-shaped member is stacked on top of the lower block-shaped member by suspending and lowering the upper block-shaped member and inserting each of the guide pieces into the inner periphery from the lower end edge of the upper block-shaped member. A method for assembling a prefabricated buried box using jigs for prefabricated buried boxes such as handholes and manholes.

Further, according to the invention of claim 5, a hole is provided in the outer surface of the plate-like contact portion of the guide piece, a roller is rotatably supported in the hole, and one side of the roller is slightly in plate-like contact. A jig for a prefabricated buried box such as a handhole or manhole according to claim 1 or 3, which protrudes from the outer surface of the part.

Further, according to the sixth aspect of the invention, in the assembly of a prefabricated buried box such as a handhole, manhole, or the like, which is made by stacking block-shaped members, the jig of the fifth aspect is used to form the first part of the lower part of the prefabricated buried box. Each guide piece is protruded from the upper end edge of the block-shaped member, and after stacking the upper second block-shaped member on the first block-shaped member using these guide pieces as guides, the upper third block-shaped member is further stacked. are stacked along the inner peripheral surface of the second block-shaped member while rotating the rollers of each guide piece of the jig in contact with the inner peripheral surface of the second block-shaped member. A method for assembling an assembled buried box using the jig for assembled buried boxes such as handholes and manholes according to claim 5, characterized in that the jig is pulled up.

According to the inventions of claims 1 to 6, the jig can be installed without attaching other members to the block-shaped members at the top and bottom of the stacked burial boxes such as handholes and manholes, and without processing them. If it is installed on the lower block-shaped member and the guide pieces protrude from the four corners, four sides, or the inner peripheral surface of the block-shaped member, these guide pieces hang down the upper block-shaped member, and the lower block-shaped member The upper block-shaped member can be easily and accurately stacked on the lower block-shaped member.

Also, when assembling a tall manhole or the like, if the assembly type buried box jig is used, an operator can enter the lower block-shaped member to align the upper and lower blocks, or the outside can be pressed. Therefore, the assembly work can be performed safely without the need for a ladder or a stepladder.

Moreover, the jig utilizes the bone structure of the folding umbrella, especially the spring force of the spring members provided on the folding ribs or the elasticity of the folding ribs to press and fix each guide piece against the inner peripheral surface of the block-shaped member. Therefore, it is possible to deal with square, rectangular, triangular, polygonal, circular, and elliptical shapes regardless of the cross-sectional shape of the block-shaped member. In addition, the jig is well-balanced due to the frame structure and shape of the folding umbrella, and the plurality of guide pieces on the outside are in contact with the four corners or sides of the handhole and manhole, and only the vertical load is applied to the support. stable.

Further, according to the fifth and sixth aspects of the invention, after stacking the first upper block-shaped member on the lower block-shaped member, the second block-shaped member is further stacked on the first upper block-shaped member. When stacking the block-shaped member on the upper part of the above, while rotating the roller of each guide piece of the assembly type buried box jig, it is pulled up along the inner peripheral surface of the first upper block-shaped member with a small force. It is possible to smoothly pull up the jig for the assembly type buried box.

FIG. 2 is a front view of a state in which the frame structure of the folding umbrella of the assembly type buried box jig according to Embodiment 1 of the present invention is almost folded. FIG. 4 is a plan view showing a state in which the rib structure of the folding umbrella of the assembly type buried box jig according to Embodiment 1 of the present invention is substantially folded. FIG. 4 is a front view of the folding umbrella frame structure of the assembly type buried box jig according to Embodiment 1 of the present invention in an open state; FIG. 4 is a plan view of the foldable umbrella frame structure of the assembly type buried box jig according to Embodiment 1 of the present invention in an open state; FIG. 2 is a partially cross-sectional front view showing a state in which the assembly type buried box jig according to Embodiment 1 of the present invention is installed on the lower block-shaped member of the hand hole, and the upper block-shaped member is suspended. 1 is a plan view of a state in which a jig for an assembly type buried box according to Embodiment 1 of the present invention is installed in a handhole; FIG. 1 is a plan view of a state in which a jig for an assembly type buried box according to Embodiment 1 of the present invention is installed in a hand hole having a rectangular cross section; FIG. FIG. 2 is a plan view showing a state in which the assembly type buried box jig according to Embodiment 1 of the present invention is installed in a rectangular hand hole having a longer long side in cross section; 1 is a plan view of a state in which a jig for an assembly type buried box according to Embodiment 1 of the present invention is installed in a hand hole having a circular cross section; FIG. FIG. 4 is a front view showing a modification of the assembly type buried box jig according to Embodiment 1 of the present invention; FIG. 10 is a front view of a state in which the rib structure of the folding umbrella of the assembly type buried box jig according to Embodiment 2 of the present invention is almost folded. FIG. 10 is a front view of a state in which the frame structure of the folding umbrella of the assembly type buried box jig according to Embodiment 2 of the present invention is opened; FIG. 10 is a partially cross-sectional front view of a state in which the assembly type buried box jig according to Embodiment 2 of the present invention is installed on the block-shaped member below the hand hole; FIG. 10 is a front view of a state in which the rib structure of the folding umbrella of the assembly type buried box jig according to Embodiment 3 of the present invention is almost folded. It is a figure which shows the guide piece of the jig|tool for assembly-type burying boxes of Embodiment 3 of this invention, (a) figure is a front view, (b) figure is a side view. FIG. 10 is a partially cross-sectional front view of a state in which the assembly type buried box jig according to Embodiment 3 of the present invention is installed on the lower block-shaped member of the hand hole, and the upper block-shaped member is placed on the lower block-shaped member. It is a diagram. FIG. 11 is a perspective view of a handhole using this method; FIG. 4 is a plan view of the handhole used in this method with the upper block-shaped member removed;

(Embodiment example 1)
First, an assembly type buried box jig according to Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 6. FIG.

The assembly-type buried box jig A has a frame structure of a folding umbrella. An upper wheel 2 is fixed to the upper end of the support 1. - 特許庁A lower potter's wheel 3 that is slidable in the vertical direction of the column 1 is crowned in the middle of the column 1 . One ends of eight folding ribs 4 are connected to the upper potter's wheel 2 so as to be vertically rotatable, and each folding rib 4 extends radially. Each of these folding bones 4 has three bones, a main bone 4a, a secondary bone 4b, and a tip bone 4c, which are connected to each other so as to be freely rotatable in the vertical direction. In addition, each folded bone 4 has elasticity.

One end of eight support ribs 5 is connected to the lower potter's wheel 3 so as to be freely rotatable in the vertical direction, and the other end of each support rib 5 extends radially so as to be vertically positioned at an intermediate position of the main rib 4a of the folding rib 4. It is rotatably connected in the direction. An operating rod 6 is provided, one end of which is connected to the front portion of each supporting rib 5 where it is connected to each master rib 4a, and the other end of which is rotatably connected to the projecting end 4b1 of the rib 4b. Further, the rib 4a and the rib 4b are rotatably connected at a position slightly inside the projecting end 4b1 of the rib 4b.

In addition, the rib 4b and the tip bone 4c are connected to each other so as to be freely rotatable in the vertical direction at a position slightly inside the projecting end 4c1 of the base of the tip bone 4c. A central portion of a driving rod 7, which is rotatably connected at one end between the connection points with the distal bone 4b and at the other end to the projecting end 4c1 of the distal bone 4c, is slidably locked to the central portion of the rib 4b. and curved at both ends to form an arcuate shape. Further, the operating rod 6 and the driving rod 7 have springiness and elasticity. Thus, when the lower wheel 3 is lifted along the post 1, each folding rib 4 extends radially from the upper wheel 2. - 特許庁When the lower wheel 3 is fully lifted near the upper wheel 2 of the post 1, each folded bone 4 is curved from the upper wheel 2 due to its springiness and elasticity, and its tip extends slightly downward.

An arm 8 protrudes from the outer surface of the base of the tip bone 4c, and a guide piece 9 is connected to the tip of the arm 8 so as to be vertically rotatable. The lower portion of the guide piece 9 forms a plate-like contact portion 9a, and the upper portion thereof forms an inwardly curved portion 9b.

Further, a stand frame 10 having a circular shape in a plan view is provided below the column 1 so that the assembling jig A can stand on its own. The stand frame 10 is provided with a length adjusting portion 11 that can extend and contract the height of the support 1 . Furthermore, the lower potter's wheel 3 can be freely fixed at an arbitrary position on the column 1 by tightening a screw 12 or the like.

When the lower potter's wheel 3 is lifted along the post 1, the supporting ribs 5 push up the ribs 4a of the folding ribs 4, whereby the ribs 4 are opened and pulled by the operating rods 6 to pull the ribs. 4b opens, and furthermore, the tip bone 4c tries to open due to the force of the drive rod 7. This state is shown in FIGS. This is a state in which the folded bone 4 is not completely opened, but when the folded bone 4 is opened on the inner circumference of a handhole or manhole, opening the folded bone 4 in such an incomplete state will cause the tip bone of the folded bone 4 to open. 4c and each guide piece 9 strongly presses the inner peripheral surface of the handhole or manhole, and each guide piece 9 is stable.

As shown in FIG. 17, a hand hole H using this prefabricated buried box jig A is constructed by stacking a first block-shaped member H1, a second block-shaped member H2, a third block-shaped member H3, and so on. As shown in FIG. 18, each block-shaped member such as the second block-shaped member H2 and the third block-shaped member H3 is provided with a sealing material 13 for bonding on the upper end edge thereof. In addition, there is provided an oblique inner corner surface H21 formed by corrugations at four corners of the four sides of the inner circumference of the frame. These inner corner surfaces H21 are diagonally opposite to each other. As shown in FIG. 18, the handhole H is composed of a frame having a substantially square cross section.

Next, a method for assembling the handhole H using the assembly type buried box jig A will be described.

First, as shown in FIG. 5, a hole 14 is dug in the ground surface, and the first and second block-shaped members H1 and H2 are placed thereon. The first block-shaped member H1 is plate-shaped, and when the second block-shaped member H2 is placed on the first block-shaped member H1, the assembly type buried box jig A cannot be used. The assembly-type buried box jig A is used when assembling the third block-shaped member H3 and subsequent members.

Then, the assembly-type buried box jig A is installed in the assembled first and second block-shaped members H1 and H2. When the lower potter's wheel 3 is lifted along the post 1, the folded ribs 4 spread radially, and the guide pieces 9 come into contact with the inner peripheral surface of the second block-shaped member H2. FIG. 6 shows this state viewed from above. In this manner, the guide piece 9 abuts on the square inner corner surface H21 of the second block-shaped member H2, and also the guide piece 9 abuts on the inside of the four sides of the second block-shaped member H2.

Although the lengths from the post 1 of the assembly type burying box jig A to the four sides of the second block-shaped member H2 and the lengths to the inner corner surfaces H21 of the square are different, they extend radially from the upper potter's wheel 2. The folding ribs 4 extend outward while bending the springy and elastic main ribs 4a, secondary ribs 4b, and front ribs 4c, so that the difference in length is absorbed. Therefore, each guide piece 9 presses against the inner side of each of the four sides of the second block-shaped member H2 and the square inner corner surface H21.

Therefore, the height of the column 1 is adjusted by the height adjusting portion 11, and each guide piece 9 presses the plate-like contact portion 9a against the inner peripheral surface of the upper end of the second block-shaped member H2, thereby causing the plate-like contact. The upper portion of the contact portion 9a and the curved portion 9b are made to protrude from the upper end of the second block-shaped member H2. This state is shown in FIG.

After that, as shown in FIG. 5, the third block-shaped member H3 is hung by a crane, and the third block-shaped member H3 is brought down above the second block-shaped member H2. At that time, the guide pieces 9 protruding from the upper end of the second block-shaped member H2 are adjusted so that they are all located on the inner circumference of the lower end of the third block-shaped member H3, and the guide pieces 9 are adjusted so that they are all positioned on the inner periphery of the lower end of the third block-shaped member H3. The third block-shaped member H3 is placed on the second block-shaped member H2 by inserting it into the inner circumference. Thereby, the third block-shaped member H3 can be accurately placed on the second block-shaped member H2.

In Embodiment 1, the handhole H to be assembled has a square cross section, but as shown in FIG. 7, the assembly jig A of the present invention can also be used for a handhole H having a rectangular cross section. In this case, the guide pieces 9 do not come into contact with the inner corner surfaces H21 at the four corners of the hand hole H, but come into contact with the four sides. can do.

The assembly jig A of the present invention can also be used in the case where the hand hole H has a rectangular cross section and the length of the long side is longer than that shown in FIG. In this case, as shown in FIG. 8, two embedded box assembly jigs A can be used side by side. Also, in a hand hole H having a circular cross section, as shown in FIG. 9, each guide piece 9 can be installed in the same manner as in the first embodiment.

Furthermore, as shown in FIG. 10, the post 1 may be extended upward from the upper potter's wheel 2 and a ring 15 may be provided at the tip thereof. In this case, one end of a rope or wire can be fixed to the ring 15 to lift the assembly jig A upward.

(Embodiment example 2)
Next, an assembly type buried box jig B according to Embodiment 2 of the present invention will be described with reference to FIGS. 11 to 13. FIG.

As shown in FIG. 11, the assembly-type buried box jig B of the second embodiment is a folding umbrella turned upside down. Accordingly, the lower wheel 16 is fixed, and the upper wheel 17 is attached to the post 1 so as to be vertically slidable. The proximal ends of the folding ribs 4 are connected to the lower wheel 16 so as to rotate vertically, and the proximal ends of the support bones 5 are connected to the upper wheel 17 so as to rotate vertically.

Other configurations are the same as those of the jig A of the first embodiment. A stand frame 10 is provided on the post 1 below the lower potter's wheel 16, and has a length adjustment part 11. The upper potter's wheel 17 can be freely fixed at any position on the post 1 by tightening a screw 12 or the like. . A ring 18 for suspension is provided at the upper end of the support 1 .

The assembly type buried box jig B of the second embodiment is also configured such that when the upper potter's wheel 17 is lowered, the folding ribs 4 are opened as shown in FIG. Further, as shown in FIG. 13, the guide piece 9 abuts and presses the inner peripheral surface of the second block-shaped member H2 of the hand hole H. As shown in FIG. The upper portion of the plate-like contact portion 9a and the curved portion 9b of these guide pieces 9 protrude upward from the upper end portion of the second block-shaped member H2.

In the jig B of Embodiment 2, as in Embodiment 1, the third block-shaped member H3 is suspended on the second block-shaped member H2. A large number of guide pieces 9 protrude from the upper edge of H2 and serve as guides when joining the third block-shaped member H3.

(Embodiment example 3)
Next, an assembly type buried box jig C according to a third embodiment of the present invention will be described with reference to FIGS. 14 to 16. FIG.

The assembled buried box jig C of the third embodiment is substantially the same as the assembled buried box jig A of the first embodiment. Therefore, only the different configurations will be described. A different point is that a roller 19 is provided on the guide piece 9 .

That is, a hole 20 is provided in the outer surface of the guide piece 9, and a roller 19 is rotatably supported on a shaft 21 extending through the hole 20. As shown in FIG. 15A, one side of the roller 19 slightly protrudes from the outer surface of the plate-like contact portion 9a of the guide piece 9. As shown in FIG.

As shown in FIG. 16, when this jig C is installed on the second block-shaped member H2 of the hand hole H, the plate-shaped contact portion 9a of the guide piece 9 protrudes from the second block-shaped member H2 due to the projection of the roller 19. It is positioned slightly inside the inner peripheral surface of H2.

After the third block-shaped member H3 is placed on the second block-shaped member H2 by being guided by these guide pieces 9, one end of the rope 22 is fixed to the ring 15 provided at the upper end of the column 1. By pulling the ring 15 upward, each roller 19 of each guide piece 9 contacts the inner peripheral surface of the third block-shaped member H3 and rotates while the jig C moves to the upper part of the third block-shaped member H3. Then, the upper portion of the plate-like contact portion 9a and the curved portion 9b of each guide piece 9 can be projected from the upper end edge of the third block-like member H3 (not shown).

Although two rollers 19 are provided on each guide piece 9 of the jig C in the third embodiment, the number of rollers 19 is not limited to two. An appropriate number may be used. Further, in the jig C of the third embodiment, the guide piece 9 of the jig A of the first embodiment is provided with the roller 19, but the guide piece 9 of the jig B of the second embodiment is provided with rollers 19. Rollers 19 can also be provided.

In Embodiments 1, 2, and 3, the arm 8 is provided on the front bone 4c of the folded bone 4, and the guide piece 9 is rotatably provided at the tip of the arm 8. However, the arm 8 may not necessarily be provided. good. In that case, the guide piece 9 may be rotatably provided directly on the tip bone 4c. Further, eight folding ribs 4 are provided in the first, second, and third embodiments, but the number of folding ribs 4 may be three or more. Moreover, although the stand base 10 is circular in plan view, it may be of any other suitable shape and structure.

Furthermore, in the first, second, and third embodiments, examples of using the assembly type buried box jigs A, B, and C for handholes were shown, but the assembly type buried box jigs of the present invention can be used for manholes and the like. It can be used for assembling other assembled embedded boxes.

A, B, C Jig for assembly type buried box
H hand hole H1, H2, H3 block-shaped member H21 inner corner face 1 post 2 upper potter's wheel 3 lower potter's wheel 4 folding bone 4a master bone 4b rear bone 4c tip bone 5 supporting bone 6 operating rod 7 driving rod 8 arm 9 guide piece 9a plate Shape contact portion 9b Bending portion 10 Stand base 11 Length adjusting portion 12 Screw 13 Sealing material
14 hole 15 ring 16 lower wheel 17 upper wheel 18 ring 19 roller 20 hole 21 shaft 22 rope

Claims (6)

An upper potter's wheel is fixed to the upper end of the post, three or more folding bones extend radially from the upper potter's wheel, and each folding bone can be folded into three stages, and the main bone, the secondary bone, and the front bone can be freely rotated. connected and formed,
When the lower potter's wheel provided vertically slidably on the support is raised along the support , the rib is pushed by the supporting bone extending radially from the lower potter's wheel and having the tip thereof rotatably connected to the rib . Having a rib structure of a folding umbrella in which the ribs, the ribs and the tip ribs extend outward due to the elasticity of the folding ribs,
A guide piece consisting of a curved portion in which the upper end portion of the plate-shaped contact portion is curved inward is rotatably attached to the outside of all or part of the outermost tip bone of the folded bone, and the support is attached to the lower portion of the support. A handhole, a manhole, etc., characterized in that it has a stand base for standing up, the support has a length adjustment part that can expand and contract the height, and the lower potter's wheel can be freely fixed at any point on the support. Jig for assembly-type buried box. In the assembly of prefabricated buried boxes such as handholes and manholes, which are made by stacking block-shaped members,
installing the jig according to claim 1 in a block-shaped member at the bottom of the prefabricated burying box,
Raise the lower potter's wheel upward along the support, open a plurality of folding bones radially extending from the upper potter's wheel provided at the upper end of the support, and insert the plate-shaped contact portion of the guide piece into the upper end of the lower block-shaped member. The lower wheel is fixed in a state where it is pressed against the peripheral surface and the curved portion of each guide piece protrudes upward from the upper edge of the block-shaped member,
The upper block-shaped member is suspended from the block-shaped member, the guide pieces are inserted into the inner periphery from the lower edge of the upper block-shaped member, and the upper block is placed on the lower block-shaped member. 2. A method for assembling a knockdown type buried box using the jig for a knockdown type buried box such as a handhole or manhole according to claim 1, wherein the members are stacked. A lower potter's wheel is fixed to the lower part of the support, and three or more folding bones extend radially from the lower potter's wheel, and each folding bone connects a main bone, a secondary bone, and a front bone that can be folded in three stages so as to rotate freely. consists of
When the upper potter's wheel slidably provided on the post is lowered along the support shaft, the ribs are pushed by the support bones extending radially from the upper potter's wheel and having their tips rotatably connected to the ribs, It has a bone structure in which the bone structure of the folding umbrella is upside down, in which the ribs, the ribs, and the tip ribs extend outward by the spring force of the spring members provided on the folding ribs or the elasticity of the folding ribs,
A guide piece consisting of a curved portion in which the upper end of the plate-shaped contact portion curves inward is rotatably attached to the outside of all or part of the outermost tip bone of the folded bone, and the support is attached to the lower portion of the support. A handhole, manhole, etc. Jigs for assembly-type buried boxes. In the assembly of prefabricated buried boxes such as handholes and manholes made by stacking block-shaped members,
The jig of claim 3 is installed in the block-shaped member at the bottom of the prefabricated embedded box, the upper potter's wheel is lowered along the support, and a plurality of radially spreading from the lower potter's wheel provided at the bottom of the support The folded ribs are opened, the plate-like abutting portions of the guide pieces are pressed against the inner peripheral surface of the upper end of the lower block-shaped member, and the curved portions of the respective guide pieces protrude upward from the upper edge of the block-shaped member. Fix the upper potter's wheel in the state of
The upper block-shaped member is suspended from the block-shaped member, the guide pieces are inserted into the inner periphery from the lower edge of the upper block-shaped member, and the upper block is placed on the lower block-shaped member. 4. A method for assembling a knockdown type buried box using a jig for a knockdown type buried box such as a handhole or a manhole according to claim 3, wherein the members are stacked. A hole is provided in the outer surface of the plate-like contact portion of the guide piece, a roller is rotatably supported in the hole, and one side of the roller is slightly protruded from the outer surface of the plate-like contact portion. A jig for an assembled buried box such as a handhole or manhole according to claim 1 or 3. In the assembly of prefabricated buried boxes such as handholes and manholes made by stacking block-shaped members,
Using the jig of claim 5, each guide piece is protruded from the upper end edge of the first block-shaped member in the lower part of the assembly type burying box, and using these as a guide, the second block-shaped member in the upper part is connected to the first block-shaped member. After stacking on the block-shaped member, when stacking the upper third block-shaped member, the roller of each guide piece of the assembly type buried box jig is brought into contact with the inner peripheral surface and rotated. 6. The assembly-type buried box jig for handholes, manholes, etc. according to claim 5 is pulled up along the inner peripheral surface of the second block-shaped member. Method of assembling the assembled embedded box used.

Images