JPH0657943U - Formwork device for raising manhole frame - Google Patents

Abstract

(57) [Summary] [Purpose] To make it easy to attach a concrete filling form used for raising the manhole form. [Structure] In order to dispose the frame body 2 above the side block 1 at a position separated by an arbitrary height, a strip plate member 5 is applied to the circular opening 4 of the side block to separate the side block 1 and the frame body 2. The inner peripheral surface between them is closed to form a space surrounded by the side block 1, the frame body 2 and the strip plate member 5, in which the concrete 3 can be filled. The strip plate member 5 is fixed by pressing it outward from the center of the circular opening 4 with a pressing tool 6. Further, the frame body 2 is positioned and fixed to the upper portion of the strip plate member 5 by the fastener 7.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a formwork device for raising a manhole frame.

[0002]

[Prior art]

 The raising of the manhole frame itself is well known in the art, and the raising frame is also sold on the market together with the side blocks and the lid receiving frame. However, the conventional raising frame has a certain height, and therefore the intermediate height is increased. It cannot be used when raising the height.

[0003]

[Problems to be solved by the device]

 The present invention has been made in view of the above points, and an object thereof is to make it possible to easily raise a commercial padding frame when it cannot be dealt with.

[0004]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention relates to a formwork apparatus for placing a raised concrete 3 between a side block 1 located at a lower position and a frame body 2 located apart from the side block 1, and a circular opening of the side block 1. 4 is applied along the inner peripheral surface of the circular opening 4 so that it can be deformed along the circumference of the circular opening 4 and is flexible enough to be deformed along the circumference of the circular opening 4. A pressing tool 6 for pressing the strip plate member 5 toward the inner peripheral surface of the circular opening 4 is arranged inside the strip plate member 5, and the inner upper end portion of the strip plate member 5 and the outer upper end portion of the frame body 2 are arranged. The frame body 2 is positioned and fixed to the upper part of the strip plate member 5 by a fastener 7 that holds the strips, and the concrete 3 is placed between the side block 1 and the frame body 2 from the outside with the strip plate member 5 as the inner formwork. This means that it is configured to be installed.

[0005]

【Example】

 A description will be given below with reference to the drawings. The manhole frame is a frame body 2 having a circular opening 10 and is arranged above the side block 1 serving as a base via an existing raising frame 20. The circular opening 4 of the side block 1, the circular opening 10 of the frame body 2, and the inner diameter of the raised frame 20 have substantially the same diameter. Reference numerals 8 and 9 denote tubular projections of the frame body 2.

In order to apply the strip plate member 5 having the flexibility which is deformable along the circular opening 4 of the side block 1 and the strength required as a mold along the inner peripheral surface of the circular opening 4. It is prepared. The strip plate member 5 is in contact with the side opening 1 at a depth necessary to fix the side opening 1 at least once around the circular opening 4 by the pressing tool 6 to be described later, and is arranged apart from the upper layer thereof. It has such a height that it reaches the upper end of the circular opening 10 of the frame body 2 to be formed. In the normal case, the strip member 5 may be discarded after one use, and as a material for such strip member 5, a so-called veneer plate having a plate thickness of several millimeters or less can be used.

A pressing tool 6 is used to fix the strip plate member 5 to the inner peripheral surface of the circular opening 4. The illustrated pressing tool 6 presses the strip member 5 radially outward from the center of the circular opening 4, and includes two rods 11 and 12 linearly arranged in the diametrical direction. There is a tan buckle 13 that connects them at the inner ends of the rods 11 and 12 so that they can expand and contract in the same direction. In the tan buckle 13, a screw 15 is formed on the inner end of one rod 11 to a desired length, and a female screw 16 to be screwed with the screw 15 is formed on one end of a cylindrical rotor 17, and the other rod is An annular groove 18 is formed in the inner end of 12 in the circumferential direction, and a stop shaft 19 engaged in the groove is screwed into the other end of the rotor 17 to be attached (FIG. 3). For this reason, the tan buckle 13 can be formed with a set of screws, but it is of course possible to form the tan buckle with forward and reverse screws like a normal tan buckle.

At the outer ends of the rods 11 and 12 of the pressing tool 6, arc-shaped backing plates 14 are provided which are in surface contact with the strip plate member 5 in contact with the inner peripheral surface of the circular opening 4 and hold it down. Has been. The backing plate 14 is provided with a reinforcing rib 27 on the inside, and a cylindrical bearing 28 is formed in the center thereof, and the outer end portions of the rods 11 and 12 are inserted therein. A set screw 9 is screwed into the bearing 28 to fix the outer end of the rod.

Fasteners 7 are attached to the outer periphery of the upper end of the band plate member 5 for positioning and fixing the frame body 2. The illustrated fastener 7 includes a vertically long inner piece 21 arranged at the inner upper end portion of the strip plate member 5, an outer piece 22 arranged at the outer upper end portion of the frame body 2, and the respective pieces 21, 22. It comprises a male screw member 23 attached to one upper end of the inside, a protrusion 24 which is attached to the upper portion thereof in a substantially parallel manner as a spacer, and a nut 26 which is screwed to the male screw member 23. A through hole 25 is formed in the inner piece 21 so that the male screw member 23 is pushed inward, and the inner piece 21 and the outer piece 22 hold the strip plate member 5 and the frame body 2 from each other. Be combined.

Such a formwork device is configured such that the side block 1 or the upper end surface 31 of the fixed-size raised frame 20 placed on the side block 1 and the lower end surface 32 of the frame body 2 and the strip plate member 5 between them. Concrete 3 is cast from the outside in the form frame surrounded by the outer peripheral surface 33. In addition, the male screw member 23 of the fastener 7 is locked to the upper end of the strip member 5 to support the load of the frame body 2, and the frame body 2 is floated by several cm. After the concrete 3 is hardened, the pressing tool 6 and the fastener 7 are removed, and the strip member 5 and the like are also removed. No formwork is provided on the outside of the cast concrete 3, and it is only necessary to take care that mortar does not flow out. If the concrete 3 forms the ground around the manhole frame as it is, the outer formwork is not necessary.

[0011]

[Function of the device]

 In the above structure, the device of the present invention can hold the strip plate member 5 along the circular opening 4, and press it to the inner peripheral surface of the side block 1 by the pressing tool 6 to fix it, and the frame body 2 is the strip plate member. It can be positioned and fixed to the upper end of 5 by a fastener 7. Therefore, the work of placing the concrete 3 between the side block 1, the frame body 2 and the strip plate member 5 as a formwork can be performed very easily.

[0012]

[Effect of device]

 Since the present invention is configured and operates as described above, the frame body 2 is arranged above the side block 1 at a desired height apart from each other, and the side block 1 and the frame body 2 are provided on the inner peripheral surfaces thereof. It is possible to raise the manhole frame by placing concrete 3 using the strip members 5 as a formwork, and therefore to easily raise the height that cannot be handled by the ready-made frame. There is an effect that can.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a frame device for raising a manhole frame according to the present invention.

FIG. 2 is a vertical sectional view of the above.

FIG. 3 is an exploded perspective view of a pressing tool and a fastener.

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Naoyasu Hoshino 3-22-23 Motogo, Kawaguchi City, Saitama Prefecture (72) Inventor Mitsuo Ito 15-5 Higashitakasuna Town, Urawa City, Saitama Prefecture

Claims (4)

[Scope of utility model registration request] 1. A formwork device for placing a raised concrete 3 between a side block 1 located at a lower position and a frame body 2 located apart from the side block 1, and a circular opening 4 of the side block 1. A strip plate member 5 having a flexibility that is deformable along and a strength required as a mold is applied along the inner peripheral surface of the circular opening 4, and the radial direction outward from the center direction of the circular opening 4. A pressing tool 6 for pressing the strip plate member 5 and fixing the strip plate member 5 to the inner peripheral surface of the circular opening 4 is arranged inside the strip plate member 5, and the inner upper end portion of the strip plate member 5 and the outer upper end portion of the frame body 2 are connected to each other. The frame body 2 is positioned and fixed to the upper part of the strip plate member 5 by the clamped fasteners 7, and the concrete 3 is placed between the side block 1 and the frame body 2 from the outside with the strip plate member 5 as the inner formwork. Forming device for raising a manhole frame configured as described above. 2. The pressing tool 6 includes two rods 11 and 12 arranged in a diametrical direction, and a tan buckle 13 which connects inner ends of the rods 11 and 12 so as to expand and contract in the diametrical direction. And an arcuate pad plate 14 provided on the outer ends of the rods 11 and 12 for making surface contact with the strip plate member 5 in contact with the inner peripheral surface of the circular opening 4.
The mold frame device for raising a manhole frame according to claim 1, comprising: 3. A tan buckle 13 has a rotor 17 having a male screw 15 formed on an inner end portion of one rod 11 and a female screw 16 screwed to the male screw 15, and a rotor 17 having the other rod 1.
The manhole frame raising frame device according to claim 2, further comprising a stop shaft (19) rotatably attached to an annular groove (18) formed in the inner end portion of the second shaft. 4. The fastener 7 includes an inner piece 21 arranged at an inner upper end portion of the strip plate member 5, an outer piece 22 arranged at an outer upper end portion of the frame body 2, and each of the pieces 21, 22. A male screw member 23 provided on the upper part of one of them, a protrusion 24 parallel to the male screw member 23, and a hole 25 formed on the other of the pieces 21 and 22.
The mandrel frame raising apparatus according to claim 1, comprising a nut 26 that is screwed into a more protruding male screw 23 and that fastens the two pieces 21 and 22 together.