JP6739806B2 - Formwork holder and concrete driving method - Google Patents

Description

The present invention relates to a formwork that is assembled when a concrete structure is constructed, and more specifically, to a formwork holder for fixing the formwork to a separator and a concrete driving method using the formwork holder. Is.

Concrete is a main construction material along with steel, and is used in various structures such as civil engineering structures such as dams, tunnels and bridges, and architectural structures such as apartment houses and office buildings. The concrete structure is constructed by hardening concrete (fresh concrete) in which cement, water, aggregate and the like are mixed, and is roughly classified into precast concrete and cast-in-place concrete.

Precast concrete is manufactured in advance in a factory or the like, and is used by transporting a finished product to a predetermined place. On the other hand, cast-in-place concrete is constructed directly at the construction site, and the transported fresh concrete is cured locally to complete the desired structure. In this way, there is a difference that precast concrete is constructed in factories, etc., while cast-in-place concrete is constructed at the construction site, but in both cases, the target strength is set by driving fresh concrete into the pre-assembled formwork and curing it for a predetermined period. Is achieved, and then the mold is removed (so-called demolding) to complete the work.

In this way, the shape of the completed concrete structure is determined by the arrangement of the formwork to be assembled, and so the formwork is assembled while confirming various dimensions and positions. In addition, the formwork is structured to withstand the lateral pressure of the fresh concrete that has been cast into it, and therefore it is usually assembled using several members such as a formwork plate (concrete panel) and a separator.

FIG. 11 is a cross-sectional view showing a state before the concrete is poured into the assembled formwork. The procedure for assembling the mold will be described with reference to this figure. First, two concrete panels FR are arranged facing each other so as to secure the planned dimensions (here, wall thickness) of the concrete structure, and further, the separator SP is installed so that the concrete panels FR do not fall inside or outside during concrete driving. Install. A mold holder (plastic cone PC) is used to fix both ends of the separator SP to the concrete panel FR. Specifically, a plastic cone PC is screwed and attached to the tip of the separator SP, the tip of the plastic cone PC is inserted through a small hole formed in the concrete panel FR, and the nut is tightened to tighten the concrete panel FR. It is fixed to the PC (that is, the separator SP). Note that, as shown in FIG. 11, the surface of the concrete panel FR may be reinforced with a vertical reinforcing material VS (so-called vertical flap) and a horizontal reinforcing material HS (so-called horizontal flap). In this case, it is preferable that the concrete frame FR, the vertical reinforcing material VS, and the horizontal reinforcing material HS are sandwiched between the formwork fastener FT and the plastic cone PC.

As described above, the plastic cone PC has been mainly used in assembling the formwork. The plastic cone PC supports the concrete panel FR from the inner side (concrete side) during concrete driving, and its outer shape is generally a truncated cone shape. Then, when the mold is removed from the mold after curing the concrete for a predetermined period, the plastic cone PC is removed from the separator SP as shown in FIG. That is, in the concrete CO after the mold is removed from the mold, a truncated cone-shaped defective portion GP is formed at the portion where the plastic cone PC is removed, as shown in FIG. 12B. Since the tip of the separator SP is exposed at the defective portion GP, mortar or the like is usually filled in the defective portion GP in order to prevent corrosion of the separator SP.

In general, a large number of defective portions GP are generated, so that the filling work is extremely laborious work, and the construction period is extended by the amount of the work. Furthermore, recently, there has been a problem that the filled mortar or the like peels off. Therefore, there has been a long-felt demand for a technique capable of omitting the work of filling the defective portion GP.

Therefore, various techniques have been proposed in which filling work into the defective portion GP can be omitted. For example, Patent Document 1 discloses a concrete formwork holder capable of avoiding the generation of the defective portion GP. doing.

Japanese Patent No. 6347520

If the concrete formwork holder disclosed in Patent Document 1 is used, it is possible to avoid the occurrence of the defective portion GP, and at the same time, the shaft foot material 41 and the formwork plate 15 can be peeled off at the same time. Mold work can be performed quickly. However, on the other hand, there is also a problem that the tip end surface of the connecting screw tubular member 31 left in the concrete is exposed on the concrete surface.

An object of the present invention is to solve the problem of the conventional technique, that is, to provide a technique capable of avoiding the generation of the defective portion GP and not exposing the mold holder to the concrete surface.

The present invention has been made paying attention to the point that a gap is formed between the tip end surface of the second tubular portion left in the concrete and the mold support plate removed when the mold is released from the mold. It is an invention that was made based on an unprecedented idea.

The formwork holder of the present invention is a formwork holder that is connected to a separator and holds a formwork for concrete driving,
Axial foot material having an axial foot composed of a first axial foot section and a second axial foot section, and a plate-shaped frame support plate provided at a boundary between the first axial foot section and the second axial foot section. When,
A connecting member having a hollow tubular body composed of a first tubular portion and a second tubular portion;
An annular water stop member that can be detachably attached to the outer periphery of the connecting member,
In the boundary between the first tubular portion and the second tubular portion of the connecting material, adjacent to the water blocking material, which is formed so as to project like a brim in the outer peripheral direction of the tubular body, And a collar-shaped projection having an outer diameter larger than the outer diameter of the water blocking material ,
The mold support plate is provided vertically or substantially vertically against the longitudinal direction of the shaft foot,
A first male screw is formed on part or all of the outer circumference of the first shaft foot portion, and a second male screw is formed on part or all of the outer circumference of the second shaft foot portion,
A first female screw with which the separator is screwed is formed on a part or all of the inner peripheral surface of the first tubular portion, and the first female screw is formed on part or all of the inner peripheral surface of the second tubular portion. A second female screw is formed on which the first male screw is screwed,
When the first male screw and the second female screw are screwed together, a gap portion is formed between the tip end surface of the second tubular portion and the frame support plate.

The formwork holder of the present invention may be a part of the second male screw, and two substantially flat (including parallel) flat surfaces are formed at the tip of the second shaft foot. ..

In the mold holder of the present invention, the mold support plate may have a taper shape that is inclined inward (toward the center of the shaft) toward the concrete side (inside).

The formwork holder of the present invention may be one in which a partition wall is provided between the first tubular portion and the second tubular portion of the tubular body.

The mold holder of the present invention may have a taper shape in which the tip of the second tubular portion is inclined inward (toward the center of the tubular body) toward the side of the frame (outside). ..

The concrete driving method of the present invention is a method of driving concrete into a mold assembled using a mold holder,
The formwork holder includes a shaft foot including a first shaft foot portion and a second shaft foot portion, and a plate-shaped mold support plate provided at a boundary between the first shaft foot portion and the second shaft foot portion. And a connecting member having a hollow cylindrical body composed of a first cylindrical portion and a second cylindrical portion, and an annular water stop member detachably attachable to the outer periphery of the connecting member. Adjacent to the water blocking material, which is formed at the boundary between the first tubular portion and the second tubular portion of the connecting member so as to project like a flange in the outer peripheral direction of the tubular body. And a collar-shaped projection having an outer diameter larger than the outer diameter of the water blocking material ,
The mold frame support plate is provided on the shaft leg perpendicularly or substantially perpendicularly to the longitudinal direction thereof,
A first male screw is provided on part or all of the outer circumference of the first shaft foot portion, and a second male screw is provided on part or all of the outer circumference of the second shaft foot portion,
A first female screw with which a separator is screwed is formed on a part or all of the inner peripheral surface of the first tubular portion, and the first male screw is formed on part or all of the inner peripheral surface of the second tubular portion. A second female screw to be screwed with is formed, and a partition wall is provided between the first tubular portion and the second tubular portion,
When the first male screw and the second female screw are screwed together, a gap portion is formed between the tip end surface of the second tubular portion and the mold frame support plate,
And connecting the connecting member and the separator by screwing and said and said separator first female screw, coupling the shaft foot member and the connecting member by screwing the first male screw and the second female thread And a mold assembly step of fixing the mold to the mold holder after passing the second male screw through an insertion hole provided in the mold,
The gap formed between the distal end surface of the second cylindrical portion and the mold support plate, a step implantation hit write no concrete concrete as concrete (mortar) flows,
Perform demolding of the mold after the concrete curing, it consists, and outside to mold demolding step takes the shaft foot member from the connecting member,
Removing the shaft foot member from the connecting member, the distal end surface of the second cylindrical portion is covered with concrete (mortar), characterized in that.

The formwork holder and the concrete driving method of the present invention have the following effects. (1) Since the tip surface of the second tubular portion left in the concrete is covered with mortar after the shaft foot material is removed when the mold is released from the mold, part of the mold holder is on the concrete surface. There is no need to perform any special work after the mold is released from the mold.
(2) Since it is possible to avoid the occurrence of a defective portion, a complicated filling operation can be omitted.
(3) By forming two flat surfaces on a part of the second male screw at the tip end portion of the second shaft foot portion, the shaft foot material can be secured without damaging the second male screw even if a predetermined tool is used. It can be removed.
(4) Since the outer diameter of the collar-shaped projection formed on the outer periphery of the connecting member is larger than the outer diameter of the water stop material attached to the connecting member adjacent to the collar-shaped protruding body, the collar-shaped protrusion The body functions as a stopper for this water blocking material. Therefore, the water blocking effect is high when the coated concrete is destroyed.

(A) is a side view showing a form holder of the present invention in a state where the form is assembled, and (b) is an enlarged side view showing details of the form holder. (A) is a side view showing a state in which fresh concrete is driven into a concrete panel fixed to a form holder, and (b) is a side view showing hardened concrete after the mold is removed from the mold. (A) is a side view showing the details of a shaft foot material, (b) is a sectional view of a form supporting plate portion of the shaft foot material, and (c) is a sectional view of a flat surface portion of the shaft foot material. (A) is a side view showing the details of a shaft foot material provided with a tapered form supporting plate, and (b) is a shaft foot material having a tapered form supporting plate removed. The side view which shows a box removal part. (A) is sectional drawing seen from the side which shows the detail of a connection material, (b) is sectional drawing seen from the front of a connection material. (A) is a side view showing the details of the connecting member in which the tip of the tubular body is tapered, and (b) is formed on the surface of the connecting material in which the tip of the tubular body is tapered. The side view which shows the covered concrete. (A) is a side view showing a mold holder provided with a water blocking material, (b) is a plan view showing the water blocking material, and (c) is a side view showing a connecting material having a collar-shaped projection. Cross section. The flowchart which shows the flow of the main processes of the concrete driving method of this invention. Step diagram for assembling the formwork. Step diagram until the mold is removed from the mold. Sectional drawing which is the assembled formwork and shows the state before driving in concrete. (A) is sectional drawing which shows the plastic cone removed from a separator, (b) is sectional drawing which shows the concrete in which the truncated cone-shaped defect part was formed in the part which removed the plastic cone.

An example of an embodiment of a form holder and a concrete driving method according to the present invention will be described with reference to the drawings. The concrete driving method of the present invention is a method of rolling using the mold holder of the present invention. Therefore, first, the mold holder of the present invention will be described, and then the concrete driving method of the present invention. I will explain.

1. Formwork Holder FIG. 1A is a side view showing the formwork holder 100 of the present invention in a state where the formwork is assembled. As shown in this figure, the formwork holder 100 is screwed and attached to the tip of the separator SP, like a conventionally used plastic cone. Further, the front end of the mold holder 100 on the mold side (right side in the figure) is inserted into a small hole formed in the concrete panel FR and tightened by the mold fastener FT, so that the vertical reinforcing member VS (so-called vertical length) is obtained. The concrete panel FR is fixed together with the horizontal reinforcement material HS (so-called horizontal flap).

FIG. 1B is an enlarged side view showing details of the form holder 100. As shown in this figure, the mold holder 100 is configured to include a shaft foot member 200 and a connecting member 300, and has a male screw formed on the shaft foot member 200 and a female screw formed on the connecting member 300, as will be described later. The shaft foot material 200 and the connecting material 300 are connected by screwing. Then, when they are screwed to a state where they cannot be rotated any more (hereinafter, referred to as “final screwing state”), the front end surface of the connecting member 300 on the form side (right side in the figure) and the form of the shaft foot member 200. A gap 400 is formed between the support plate 220 and the support plate 220.

FIG. 2(a) is a side view showing a state in which fresh concrete is driven into the concrete panel FR fixed to the form holder 100, and FIG. 2(b) is hardening after the form is removed from the mold. It is a side view which shows the made concrete. As shown in FIG. 2A, the mold supporting plate 220 of the shaft foot material 200 supports the concrete panel FR from the back side (concrete side) until the mold is removed from the mold. A gap 400 is formed between 220 and the connecting member 300.

When the target concrete strength is developed after a predetermined curing period, the mold is demolded. At this time, the shaft foot material 200 including the form supporting plate 220 is removed, and the connecting material 300 is left in the concrete. However, due to the effect of forming the gap portion 400 as shown in FIG. 2B. The surface side (right side in the figure) of the connecting member 300 is covered with the covering concrete 410. That is, the surface exposure of the connecting material 300 is avoided, and as a result, the corrosion of the connecting material 300 can be suppressed.

Hereinafter, each of the main elements constituting the mold holder 100 of the present invention will be described in detail.

(Shaft foot material)
3A is a side view showing the details of the shaft foot material 200, and FIG. 3B is a cross-sectional view of the form supporting plate 220 portion of the shaft foot material 200 (a shown in FIG. 3A). -A arrow). As shown in this figure, the shaft leg member 200 is configured to include a shaft leg 210 including a first shaft leg portion 211 and a second shaft leg portion 212, and a form supporting plate 220. The formwork support plate 220 is provided at a boundary between the first shaft foot portion 211 and the second shaft foot portion 212, that is, one side (the left side in the figure) of the formwork support plate 220 of the shaft foot 210 has the first shaft. The foot portion 211 is formed, and the second shaft foot portion 212 is formed on the other side (right side in the figure).

As shown in FIG. 3, the shaft foot 210 may be formed in a columnar shape (rod shape) having a circular cross section, and the formwork support plate 220 may be formed in a circular plate shape. Alternatively, both the shaft foot 210 and the form support plate 220 can be configured to have an oval or polygonal (hexagonal or octagonal) sectional shape. The frame support plate 220 may be configured so that the shaft foot material 200 is substantially vertical (including vertical) to the shaft foot 210, and the shaft foot 210 and the frame support plate 220 are integrated.

Further, as shown in FIG. 3A, a first male screw 213 is formed on the outer peripheral surface of the first shaft foot portion 211, and a second male screw 214 is formed on the outer peripheral surface of the second shaft foot portion 212. In this figure, the first male screw 213 is formed only on a part of the outer peripheral surface of the first shaft foot portion 211 in the axial direction (the left-right direction in the drawing), and the outer peripheral surface of the second shaft foot portion 212 is also axially formed. Although the second male screw 214 is formed only on a part of the above, the invention is not limited to this, and both the first shaft foot portion 211 and the second shaft foot portion 212 (or only one) are formed on the entire outer peripheral surface in the first axial direction. The male screw 213 and the second male screw 214 may be formed.

The second shaft foot portion 212 may be provided with a flat surface for gripping by a tool such as pliers, a spanner, or a wrench. In this case, as shown in FIG. 3A, the second shaft foot portion 212 (second It is advisable to form a flat surface 215 on which no screw is provided on a part of the front end side (the right side in the figure) of the male screw 214). Further, since it is sandwiched by pliers or the like, it is desirable to form two flat surfaces 215 that are substantially parallel (including parallel) as shown in FIG. 3C. When removing the shaft foot material 200 during mold release, the flat surface 215 can be gripped with pliers or the like in order to rotate the shaft foot 210, and as a result, the second male screw 214 is not damaged and is in a good state. Therefore, the shaft foot material 200 can be reused.

As described above, the form support plate 220 has a plate shape, and both sides may have the same shape as shown in FIG. 3(a), or one side may be formed into a small side by tapering. it can. Specifically, as shown in FIG. 4A, the formwork support plate 220 is tapered toward the separator side (the left side in the drawing) toward the inside (first axial foot portion 211), and the formwork side ( The diameter of the surface on the separator side (left side in the figure) is smaller than the diameter of the surface on the right side in the figure. As a result, a haunch is formed at the mark (so-called box-opening portion) where the mold-frame support plate 220 is removed when the mold is released from the mold, and the box-out portion has a stable shape. Will be suitable.

(Connecting material)
FIG. 5A is a diagram showing the details of the connecting member 300 (a sectional view as seen from the side), and FIG. 5B is a sectional view of the connecting member 300 (a bb arrow shown in FIG. 5A). Sight). As shown in this figure, the connecting member 300 is configured to include a hollow tubular body 310, and a first tubular portion 311 is formed on the separator side (left side in the figure) of the tubular body 310 to form a tubular shape. A second tubular portion 312 is formed on the mold frame side (right side in the figure) of the body 310. The tubular body 310 has a hollow tubular shape, and can be configured as a column having a circular cross section as shown in FIG. 5B, or can have an oval or polygonal (hexagonal or octagonal) cross section. It can also be configured as a column.

Further, as shown in FIG. 5A, a first female screw 313 is formed on the inner peripheral surface of the first tubular portion 311, and a second female screw 314 is formed on the inner peripheral surface of the second tubular portion 312. It As shown in FIG. 1A, the first female screw 313 is screwed with the separator SP, and as shown in FIG. 1B, the second female screw 314 is screwed with the first male screw 213 of the shaft foot material 200. As a result, the separator SP and the connecting material 300 are connected, and the shaft foot material 200 and the connecting material 300 are connected, that is, the separator SP and the shaft foot material 200 are connected via the connecting material 300.

The first female screw 313 may be formed on only a part of the inner peripheral surface of the first tubular portion 311 in the axial direction, or may be formed on the entire axial direction. Similarly, the second female screw 314 may be formed only on a part of the inner peripheral surface of the second tubular portion 312 in the axial direction, or may be formed on the entire axial direction. However, when the first male screw 213 and the second female screw 314 of the shaft foot material 200 are in the final screwing state, a predetermined gap portion 400 is formed between the tip end surface of the connecting material 300 and the form supporting plate 220. Therefore, it is necessary to design the formation length of the second female screw 314 (or the formation length of the first male screw 213).

As shown in FIGS. 2B and 4B, the connecting material 300 remains in the concrete CO even after the concrete structure is completed, but since the coated concrete 410 is formed on the surface of the connecting material 300, the connecting material 300 is connected. The material 300 is not exposed on the surface. However, when the coated concrete 410 is destroyed due to an unexpected situation, the connecting material 300 is exposed on the surface, and the connecting material 300 and the reinforcing bars are corroded by contact with outside air or water. There is also the risk of doing so. Therefore, as shown in FIG. 5A, the partition wall 320 may be provided inside the tubular body 310 at the boundary between the first tubular portion 311 and the second tubular portion 312. Although the outside air and water enter the first tubular portion 311, the partition wall 320 prevents entry to a deeper depth, whereby at least corrosion of the reinforcing bar can be suppressed.

As shown in FIG. 6A, the tip end of the tubular body 310 on the mold frame side (right side in the figure) may be tapered. Specifically, the tip of the tubular body 310 on the mold side is tapered so as to be inclined inward (toward the central axis of the tubular body 310) toward the mold side, and the cross-sectional diameter of the general portion of the tubular body 310 is set. The cross-sectional diameter of the tip on the mold side is smaller than that of the frame. By tapering the tip end of the tubular body 310 on the form frame side, as shown in FIG. 6B, the member thickness of the coated concrete 410 increases by the amount of taper processing, that is, the strength of the coated concrete 410 increases. Therefore, it becomes difficult to lose. Further, even if the coated concrete 410 is broken due to an unexpected situation, the area of the connecting material 300 exposed on the surface can be reduced, which is preferable.

(Water stop material)
The mold holder 100 can also be configured to include a water blocking material 500 as shown in FIG. As shown in FIG. 7( b ), the water blocking material 500 has an annular shape with an insertion hole provided inside, and the first tubular portion 311 is passed through the insertion hole, whereby the water blocking material 500 is tubular. Attach to 310. As described above, if the coated concrete 410 is destroyed due to an unexpected situation, the connecting material 300 is exposed on the surface, and the connecting material 300 and the reinforcing bar may be corroded by contact with outside air or water. By attaching the water blocking material 500 to the tubular body 310, it is possible to prevent water or the like from entering the inside from the water blocking material 500, and thereby at least prevent corrosion of the reinforcing bars. Therefore, the water blocking material 500 is preferably made of a material having water blocking property, and rubber packing or the like can be used, for example.

When attaching the water blocking material 500, it is preferable to provide the collar-shaped projection 330 on the tubular body 310. As shown in FIG. 7C, the flange-shaped protrusion 330 is formed at the boundary between the first tubular portion 311 and the second tubular portion 312, and protrudes in a flange shape in the outer peripheral direction of the tubular body 310. Shaped. Further, the outer diameter of the collar-shaped protrusion 330 may be larger than the outer diameter of the water blocking material 500. As a result, the collar-shaped protrusion 330 functions as a stopper for the water blocking material 500, and a water blocking effect when the coated concrete 410 is destroyed can be expected.

2. Concrete driving method Next, the concrete driving method of the present invention will be described. It should be noted that the concrete driving method of the present invention is a method performed using the form holder 100 described above, and therefore, a description that overlaps with the contents described for the mold holder 100 is avoided and the concrete driving of the present invention is avoided. Only the contents specific to the method will be explained. That is, the contents not described here are the same as those described in “1. Form holder”.

FIG. 8 is a flow chart showing the flow of main steps of the concrete driving method of the present invention, FIG. 9 is a step diagram until the mold is assembled, and FIG. 10 is a step diagram until the mold is demolded. Is. Hereinafter, the concrete driving method of the present invention will be described with reference to these drawings.

First, surveying is performed to mark out the position of the formwork (Step 101), and the concrete panel FR is arranged (Step 102). When the concrete panel FR on one side (left side in the figure) is placed at a predetermined position as shown in FIG. 9A, the form holder 100 of the present invention is installed (Step 103). Hereinafter, the procedure for installing the mold holder 100 will be described in detail with reference to FIG. 9.

First, the shaft foot material 200 is inserted into a small hole formed in the concrete panel FR, and the first male screw 213 is screwed into the second female screw 314 to connect the shaft foot material 200 and the connecting material 300, and the screw of the separator SP. The tip (the left end in the drawing) is screwed into the first female screw 313 to connect the separator SP and the connecting member 300 (FIG. 9A). Next, the screw tip (right end in the figure) of the separator SP is screwed into the first female screw 313 to connect the separator SP and the connecting member 300, and the first of the shaft foot members 200 inserted into the small holes of the concrete panel FR. The male screw 213 is screwed into the second female screw 314 to connect the shaft foot material 200 and the connecting material 300 (FIG. 9B). Then, the vertical reinforcing material VS and the horizontal reinforcing material HS are arranged on the surface (outer surface) of the concrete panel FR, and the vertical reinforcing material VS, the horizontal reinforcing material HS, and the concrete panel FR are formed by the frame fastener FT and the frame supporting plate 220. By sandwiching and fixing (FIG. 9(c)), the mold assembly is completed (Step 104).

When the form is assembled, fresh concrete is poured into the form as shown in FIG. 10(a) (Step 105). At this time, it is advisable to send the concrete CO into the gap 400 formed between the connecting member 300 and the form supporting plate 220 by applying vibration with the concrete vibrator CV. When the width (thickness) dimension of the gap 400 is small (for example, smaller than the coarse aggregate of fresh concrete), only the mortar part of the fresh concrete moves to the gap 400.

When the planned amount of fresh concrete is injected, curing is performed until the concrete exhibits the target strength (Step 106), and then the mold is demolded (Step 107). Hereinafter, the procedure for demolding the mold will be described in detail with reference to FIG.

First, the formwork fastener FT, the vertical reinforcing material VS, and the horizontal reinforcing material HS are removed from the concrete panel FR (left side in FIG. 10B). Then, the first male screw 213 and the second female screw 314 are unscrewed to remove the concrete panel FR and the shaft foot material 200 (on the right side of FIG. 10B). Similarly, the screwing of the other first male screw 213 and the second female screw 314 is also released, and the concrete panel FR and the shaft foot material 200 are removed (on the right side in FIG. 10C), and the mold release from the mold is completed. Although the connecting material 300 is still embedded in the completed concrete structure, the covering concrete 410 is formed on the surface side of the connecting material 300 as shown in FIG. The surface exposure of the material 300 is avoided, and as a result, the corrosion of the connecting material 300 can be suppressed.

INDUSTRIAL APPLICABILITY The formwork holder and the concrete driving method according to the present invention can be used for civil engineering structures such as concrete retaining walls and dams, building structures such as office buildings, and various other concrete structures. Considering that the present invention provides a concrete structure of good quality and, so to speak, high-quality social capital (infrastructure), it can be expected to make a great contribution not only to industrial use but also to society. It can be said to be an invention.

100 Formwork holder of the present invention 200 Shaft foot material (of formwork holder) 210 Shaft foot (of shaft foot material) 211 First shaft foot portion (of shaft foot) 212 Second shaft foot portion (of shaft foot) 213 First male screw (for shaft foot) 214 Second screw (for shaft foot) 215 Flat surface (for shaft foot) 220 Form support plate (for shaft foot material) 300 (Formwork holder) connection material 310 (connection) Material (cylindrical body) 311 (cylindrical body) first cylindrical portion 312 (cylindrical body) second cylindrical portion 313 (cylindrical body) first female screw 314 (cylindrical body) second female screw 320 Bulkhead (of connecting material) 330 Collar-shaped projection (of connecting material) 400 Gap 410 Covered concrete 500 Water-stopping material (of form holder) FR Concrete panel SP Separator PC Plastic cone VS Vertical reinforcement HS Horizontal reinforcement FT formwork fastener GP missing part CV concrete vibrator

Claims (6)

A formwork holder that is connected to a separator and holds a formwork for concrete driving,
Axial foot material having an axial foot composed of a first axial foot section and a second axial foot section, and a plate-shaped frame support plate provided at a boundary between the first axial foot section and the second axial foot section. When,
A connecting member having a hollow tubular body composed of a first tubular portion and a second tubular portion;
An annular water stop member that can be detachably attached to the outer periphery of the connecting member,
In the boundary between the first tubular portion and the second tubular portion of the connecting material, adjacent to the water blocking material, which is formed so as to project like a brim in the outer peripheral direction of the tubular body, And a collar-shaped projection having an outer diameter larger than the outer diameter of the water blocking material ,
The mold support plate is provided vertically or substantially vertically against the longitudinal direction of the shaft foot,
A first male screw is formed on part or all of the outer circumference of the first shaft foot portion, and a second male screw is formed on part or all of the outer circumference of the second shaft foot portion,
A first female screw with which the separator is screwed is formed on a part or all of the inner peripheral surface of the first tubular portion, and the first female screw is formed on part or all of the inner peripheral surface of the second tubular portion. A second female screw is formed on which the first male screw is screwed,
A mold holder, wherein when the first male screw and the second female screw are screwed together, a gap is formed between the tip end surface of the second tubular portion and the mold support plate. The form holding device according to claim 1 , wherein two parallel flat or substantially parallel flat surfaces are formed at a tip portion of the second shaft foot portion which is a part of the second male screw. Ingredient The formwork holder according to claim 1 or 2 , wherein the formwork support plate has a tapered shape that inclines inward toward the concrete side. The mold holder according to any one of claims 1 to 3 , wherein a partition wall is provided between the first tubular portion and the second tubular portion of the tubular body. .. The mold holder according to any one of claims 1 to 4 , wherein a tip end portion of the second tubular portion has a taper shape that is inclined inward toward the mold side. A method of driving concrete into a formwork assembled using a formwork retainer,
The mold holder includes a shaft foot including a first shaft foot portion and a second shaft foot portion, and a plate-shaped mold support plate provided at a boundary between the first shaft foot portion and the second shaft foot portion. And a connecting member having a hollow cylindrical body composed of a first cylindrical portion and a second cylindrical portion, and an annular water stop member detachably attachable to the outer periphery of the connecting member. Adjacent to the water blocking material, which is formed at the boundary between the first tubular portion and the second tubular portion of the connecting member so as to project in a flange shape in the outer peripheral direction of the tubular body. And a collar-shaped projection having an outer diameter larger than the outer diameter of the water blocking material ,
The mold support plate is provided vertically or substantially vertically against the longitudinal direction of the shaft foot,
A first male screw is provided on part or all of the outer circumference of the first shaft foot portion, and a second male screw is provided on part or all of the outer circumference of the second shaft foot portion,
A first female screw with which a separator is screwed is formed on a part or all of the inner peripheral surface of the first tubular portion, and the first male screw is formed on a part or all of the inner peripheral surface of the second tubular portion. And a partition wall is provided between the first tubular portion and the second tubular portion.
When the first male screw and the second female screw are screwed together, a gap portion is formed between the tip end surface of the second tubular portion and the mold frame support plate,
The separator and the connecting member are connected by screwing the separator and the first female screw, and the connecting member and the shaft foot member are connected by screwing the second female screw and the first male screw. And a frame assembly step of fixing the frame to the frame holder after passing the second male screw through the insertion hole provided in the frame,
A concrete driving step of driving concrete into the gap portion formed between the tip end surface of the second tubular portion and the formwork support plate so that concrete flows into the gap portion;
Perform demolding of the mold after the concrete curing, consists, the mold demolding step of removing the shaft foot member from the connecting member,
The concrete driving method, wherein when the shaft foot material is removed from the connecting material, the tip end surface of the second tubular portion is covered with concrete.

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