JP3115686U - Gap closing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gap closing device excellent in workability on site and excellent in divertability.
SOLUTION: A flat tube body 20 made of a flexible and non-stretchable material and a cuff 30 are formed, and a fluid supply / discharge port with a check valve is provided in a part of the flat tube body 20. While providing, the flat tube body 20 was folded back and the bending part 22 was formed.
[Selection] Figure 1

Description

The present invention relates to a gap closing device for filling a gap between gaps between various existing structures disposed opposite to each other and bonding them together.

When filling a gap between a precast beam and a beam or between a beam and a column with a consolidated material, a method of closing the gap becomes a problem.
As a general method, formwork is placed on the surface of pillars and beams so as to surround the periphery of the gap, and support materials such as pipes and squares are provided so that the formwork is not disassembled outside these formwork After assembling and restraining by attaching a restraining tool, the gap is filled with a consolidated material.
Thereafter, when a predetermined curing period has passed, the mold is removed after removing the restraining tool and the supporting material.
The formwork consists of a flat plate made of wood or metal, and is manufactured according to the site dimensions.

The technique using the flat plate-shaped form described above has the following problems.
<1> Since the molds are individually manufactured according to the on-site dimensions, they cannot be used if the on-site dimensions are different, and the diversion of the form is difficult.
<2> There are few problems when the shape of the opposing surface at the joint portion of the existing structure is a simple shape such as a rectangle, but when the shape of the opposing surface is complicated, for example, T-shaped, There is a difficulty in that a mold must be manufactured and that it takes a lot of work and time to install and disassemble a holding jig for holding the plurality of molds.
<3> As described above, since the formwork cost and the work cost increase, there is a problem that the construction cost is high.

The present invention has been made in view of the above points, and an object of the present invention is to provide a gap closing device having excellent on-site responsiveness and workability, and excellent divertability.
It is another object of the present invention to provide a gap closing device that allows easy installation and removal of a mold.

  In order to solve the above problem, the first device of the present application is a gap closing device that seals a gap formed between opposing surfaces of existing concrete structures facing each other, and has flexibility, and A flat tube body made of a non-stretchable material, a fluid supply / discharge port with a check valve provided in a part of the flat tube body, and a bent portion formed by folding the flat tube body This is a gap closing device.

  A second device of the present application is a gap closing device that seals a gap formed between opposing surfaces of opposing existing concrete structures, and is a flattening made of a flexible and non-stretchable material. A tube body and a cuff that can be inserted by superposing the flat tube body are provided, a fluid supply / discharge port with a check valve is provided in a part of the flat tube body, and the flat tube body is folded back. The gap closing device is characterized in that the bent tube portion is formed and the overlapped portion of the expanded flat tube body is constrained by a cuff to form the flat tube body in an endless shape.

  A third device of the present application is a gap closing device according to the second device, wherein a ventilation spacer is formed inside the flat tube body.

A fourth device of the present application is the gap closing device according to any one of the first to third devices, wherein the entire length of the flat tube body is longer than the peripheral length of the contour of the gap of the existing structure. .

(1) Since the gap closing device is configured by adding a flat tube body or a cuff to the flat tube body, the gap closing apparatus can be diverted as well as adjusted to a length corresponding to the length of the gap.
Furthermore, the setting of the formwork is completed only by setting the flat tube body in the gap, and the demolding is completed only by discharging the fluid of the expanded flat tube body.
Therefore, compared with the case where the conventional flat formwork is used, the diversion, assembly, and demoldability of the formwork can be greatly improved.
(2) Reuse of the formwork is possible, and the labor and time required for assembly and demolding of the formwork can be greatly reduced, and the overall construction cost can be reduced.
(3) By folding the flat tube body to form a bent portion, not only can the flat tube body be formed into an arbitrary planar shape, but also the air-releasing material during filling of the consolidated material and the consolidated material from the bent portion. By leaking, the filling condition of the consolidated material can be confirmed.
(4) Since the flat tube body is set in a flat state, not only is it easy to install in a narrow gap, but also the expansion pressure of the flat tube body can be used for the contact force to the existing concrete structure. Sealability can be secured, and the expansion pressure of the flat tube body can be prevented from acting as a pulling force of the flat tube body.
(5) By forming the ventilation spacer over at least the bending range of the flat tube body, a uniform expansion pressure can be applied over the entire flat tube body.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(1) Outline of Gap Closure Device FIGS. 1 to 7 show an example of a gap occlusion device 10 according to the present invention.
The gap closing device 10 includes a flat tube body 20 and a cuff 30 for restraining the overlapping portion of the flat tube body 20. Hereinafter, each component will be described in detail.

(2) Flat tube body As shown in FIGS. 1 and 2, the flat tube body 20 is a cylindrical body that is sealed at both ends having a formwork function. Is provided.
The fluid is expanded by supplying a fluid such as gas or liquid from the outside through the supply / discharge port 21, and the check valve mechanism of the supply / discharge port 21 is opened to discharge the fluid out of the flat tube body 20. It is possible to shrink.

In this example, the entire length of the flat tube body 20 is the contour of the gap so that the flat tube body 20 can close the entire periphery of the gap 41 formed between the opposing surfaces of the existing structures 40A and 40B such as beams and columns. The case where it forms longer than full length is demonstrated.
Further, the flat tube body 20 is larger than the gap width of the gap 41 and includes the bent portion 22 of the flat tube body 20 in a contracted state so that the flat tube body 20 can come into contact with the opposing surfaces of the existing structures 40A and 40B. The thickness is set to be smaller than the gap width of the gap 41 so that the gap 41 can be inserted into the gap 41.

The flat tube body 20 is formed of a non-stretchable material having flexibility that can be bent and having excellent airtightness that is difficult to adhere to the consolidated material.
More preferably, a material obtained by coding a resin on a known material such as a fire hose having excellent durability can be used. A known release material may be applied to the surface.

  Although it is conceivable that the inner and outer peripheral lengths of the flat tube body 20 are provided with a difference in advance so as to match the closed shape and gap length of the existing structures 40A and 40B, Diversion does not work when the circumference is different. Further, if the flat tube body is made of elastic rubber like a bicycle tube, the tube may extend and protrude from the gap to lose the formwork function.

  Therefore, in the present invention, a flat tube body 20 having a linear shape as a whole and formed of a non-stretchable material is used, and a plurality of portions in the middle of the flat tube body 20 are folded back as shown in FIG. Arbitrary shapes were given by forming the portion 22. The formation part and the bending angle of the bent part 22 are appropriately selected to form a shape that matches the closed shape of the gap.

There is a possibility that the fluid flow is blocked by bending the flat tube body 20.
Therefore, as shown in FIG. 3, a ventilation spacer 23 is formed inside the flat tube body 20 so as to pass smoothly without blocking the fluid flow at the bent portion 22.

The ventilation spacer 23 bulges along the length of the inner peripheral surface of the flat tube body 20 in addition to accommodating a separate wire material such as a metal wire that can be bent and plastically deformable and a resin wire such as a fishing line. And may be integrally formed.
In addition, the ventilation spacer 23 may be partially formed in addition to the form continuously formed over the entire length in the flat tube body 20, and the point is that at least the bent portion 22 of the flat tube body 20 is formed. The ventilation spacer 23 should just be formed over it.

(3) Cuff Cuff 30 is a restraining member for restraining the overlapping portion of the flat tube body 20 and fixing it in a closed shape, and is slidably mounted on the flat tube body 20.
Unlike the conventional plate-shaped formwork, the present invention does not require the entire length of the flat tube body 20 to completely match the entire length of the gap, and the closed loop can be selected by appropriately selecting the sliding amount of the flat tube body 20 with respect to the cuff 30. The total length of the frame, that is, the substantial length of the mold can be arbitrarily set.

The cuff 30 is a cylindrical body having a size capable of inserting two tubes obtained by polymerizing the tail end portion 25 of the flat tube body 20 and the head 24 side of the flat tube body 20.
The cuff 30 has flexibility but does not have elasticity.
By giving the cuff 30 flexibility, the cuff 30 itself receives the expansion pressure of the flat tube body 20 and bends to increase the adhesion to the opposing surfaces of the existing concrete structures 2 and 3, and the cuff 30 has great elasticity. By not having, the restraining effect of the overlapping portion of the flat tube body 20 at the time of expansion increases.

(4) Usage Method of Gap Closure Device Next, a usage method of the gap closure device 10 will be described.
As shown in FIG. 1, a flat tube body 20 having a longer overall length than the contour length of the gap 41 to be sealed is prepared, and a predetermined portion of the flat tube body 20 in a flat state is bent to form a bent portion 22. It inserts in the clearance gap 41 of structure 40A, 40B.

When most of the flat tube body 20 is disposed along the entire circumference, the tail end portion 25 of the flat tube body 20 is inserted into the cuff 30 that is externally mounted on the head 24 side of the flat tube body 20, and the cuff 30 is also placed in the gap 41. insert.
The head 24 side of the flat tube body 20 provided with the supply / discharge port 21 is exposed to the outside of the gap 41.

  Thus, by adjusting one or both of the flat tube bodies 20 inserted so as to overlap with the cuff 30 and adjusting the exterior position of the cuff 30, the endless structure has a length corresponding to the total closed length of the gap. The size of the gap closing device 10 can be set.

  Next, a fluid is supplied to the flat tube body 20 through the supply / discharge port 21, and the flat tube body 20 is expanded in the gap 41 (FIG. 5).

A ventilation spacer 23 is formed inside the bent portion 22 of the flat tube body 20 that has been drained and contracted into a flat shape, and there is a gap in the flat tube body 20 in the range where the ventilation spacer 23 is installed. It is secured. Therefore, the fluid supplied to the flat tube body 20 can smoothly pass through the bent portion 22 to apply a constant expansion pressure over the entire length of the flat tube body 20.
The expanded flat tube body 20 is in contact with the opposing surfaces of the existing structures 40A and 40B and seals the gap 41.
Even if there are some irregularities on the opposing surfaces of the existing structures 40A and 40B, the gap 41 can be sealed by following the irregularities due to the flexibility of the flat tube body 20.

Since the flat tube body 20 is installed flat and inflated, the flat tube body 20 swells greatly in the vertical direction of FIG. 4, whereas the bulge in the left-right direction is small.
In other words, most of the expansion pressure in the flat tube body 20 can be used for the contact force to the existing concrete structure to ensure high sealing performance, and the expansion pressure of the flat tube body 20 is pulled out of the flat tube body. Since it is possible to avoid working as a force, it is not necessary to provide a pop-out prevention device such as a support work outside the flat tube body 20.

As shown in FIG. 4, the flat tube bodies 20 polymerized in the cuff 30 are fixed because expansion is restrained by the cuff 30.
That is, as a result of increasing the frictional resistance in the contact surface range between the cuff 30 and the flat tube body 20 in proportion to the expansion pressure of the flat tube body 20, the polymerization of the flat tube body 20 is fixed and the flat tube body 20 is fixed to the cuff 30. There is no worry about getting out of it.

The setting of the formwork is completed by the above simple operation.
The flat tube body 20 is desirably expanded stepwise while adjusting the overall length of the flat tube body 20 without expanding the flat tube body 20 at a time.

The consolidated material 50 is injected into the gap 41 closed by the gap closing device 10.
As a method for injecting the consolidated material 50, for example, a known injection form such as injection through injection holes formed in advance in the existing structures 40A and 40B can be adopted.

During the pouring operation of the consolidated material 5, the flat tube body 20 is bent at a predetermined crossing angle at the bent portion 22, so that steps are formed at the upper and lower portions of the bent portion 22. When the flat tube body 20 is set in the gap 41 and inflated, the step forms a minute gap that communicates the inside and outside of the gap 41.
In addition to functioning as an air vent from the gap 41 when the inside of the gap 41 of the consolidated material 50 is filled through the minute gap, the air in the gap 41 is squeezed through the minute gap and the consolidated material 5 is extracted. In addition to the smooth filling, the formation of air pockets can be avoided. It is also useful for checking the filling of the consolidated material 50.
Furthermore, by confirming leakage of the consolidated material 5 through a minute gap in each bent portion 22 of the flat tube body 20, the completion time of filling of the consolidated material is determined.

In the gap closing device 10 according to the present invention, the demolding operation is completed by simply discharging the fluid of the flat tube body 20 to deflate and extract the flat tube body 20.
By wiping the flat tube body 20, the fixation of the overlapped portion of the flat tube body 20 is released, the tail end portion 25 of the flat tube body 20 is extracted from the cuff 30, and one end of the flat tube body 20 is pulled to be a consolidated material. Remove from 50 and remove.
The removed flat tube body 20 is diverted to the next clearance process together with the cuff 30.

The cuff 30 may be omitted, and the gap closing device 10 may be configured with only the flat tube body 20.
In this example, as shown in FIG. 8, the flat tube bodies 20 need only be arranged so as to intersect each other within the gap 41 between the existing structures 40 </ b> A and 40 </ b> B.

  In this example, instead of the cuff 30, the facing surfaces of the existing structures 40 </ b> A and 40 </ b> B restrain the expansion of the overlapping portion of the flat tube body 20, so that the cuff 40 can be omitted.

  Moreover, as shown in FIG. 9, the end portions of the plurality of flat tube bodies 20 may be overlapped, and this overlapping portion may be disposed in the gap 41 between the existing structures 40A and 40B.

Perspective view of gap closing device according to the present invention Plan view of gap closure device Perspective view of bent part of flat tube body Expanded cross-sectional view of an existing structure with a gap closure device Enlarged sectional view of the existing structure when the flat tube body is expanded Enlarged sectional view at the cuff position when the flat tube body expands Sectional view of VII-VII in FIG. Explanatory drawing which shows the arrangement | positioning form of the flat tube body which concerns on 2nd Example. Explanatory drawing which shows the other arrangement | positioning form of the flat tube body which concerns on 2nd Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Gap closing device 20 ... Flat tube body 21 ... Supply / exhaust port 22 ... Bending part 23 ... Ventilation spacer 24 ... Head 25 ... Tail end part 30 ...・ Cuffs 40A, 40B ... Existing structure 41 ... Gap 50 ... Consolidating material

Claims (4)

A gap closing device that seals a gap formed between opposing faces of an existing concrete structure facing each other,
It is composed of a flat tube body that is flexible and made of a non-stretchable material,
While providing a fluid supply / exhaust port with a check valve in a part of the flat tube body,
The flat tube body is folded to form a bent portion,
Gap closing device. A gap closing device that seals a gap formed between opposing faces of an existing concrete structure facing each other,
A flat tube body made of a flexible and non-stretchable material;
It is composed of cuffs that can be inserted by polymerizing the flat tube body,
While providing a fluid supply / exhaust port with a check valve in a part of the flat tube body,
Folding the flat tube body to form a bent portion,
A gap closing device, wherein the flat tube body is formed into an endless shape by constraining the overlapped portion of the expanded flat tube body with a cuff.   The gap closing device according to claim 2, wherein a ventilation spacer is formed inside the flat tube body. 4. The gap closing device according to claim 1, wherein the entire length of the flat tube body is longer than the circumferential length of the gap of the existing structure.

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