JP3072294B1 - Formwork equipment for manufacturing hollow PCa members - Google Patents

Abstract

Abstract: [Problem] To easily and accurately install an inner mold without skill.
Fixing and installation / fixing of the outer formwork can be performed. A base formwork 9 fixedly arranged at an intermediate position on a rail facility 4, an inner formwork 2 which is self-supported by inserting a lower end into the base formwork 9, and a base formwork 9 Outer movable forms 3A, 3B which are respectively disposed on both sides and are movable along the rail equipment 4.
And an opening frame into which the upper part of the inner mold 2 is inserted, and is connected to at least the movable outer molds 3A and 3B, so that the inner mold 2 and the movable outer mold 3
The formwork apparatus 1 is constituted by the closing formwork 15 for ensuring the separation from A and 3B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow PCa member manufacturing method capable of manufacturing a hollow PCa (precast concrete) member with high manufacturing efficiency while saving labor such as mold assembling work and demolding work. It relates to a formwork device.

[0002]

2. Description of the Related Art Conventionally, in a building or civil engineering structure, a precast concrete member has been used in order to save labor for a frame work, shorten a construction period, improve quality, and consider environmental issues.

Up to now, shear bars such as main bars and stirrups or assembly bars have been buried in solid concrete.
So-called full precast concrete was the mainstream,
In recent years, in order to further reduce labor and shorten the construction period, a hollow hollow PC with a hollow interior and substantially only stirrups such as stirrups arranged in the hollow concrete part
The pillar a has come to be used. In the construction, the hollow PCa column is arranged at a predetermined column construction position, and a vertical main reinforcing bar is arranged in the inner space. Then, the fresh PC is cast inside the hollow PCa column as a formwork. And build concrete pillars. This hollow PCa
Other advantages of using columns are that they are lighter in weight than the full PCa column members described above, making them easier to handle on site and simplifying lifting equipment. It can be mentioned that integration with the column / beam using the PCa member is ensured.

Conventionally, when manufacturing the hollow PCa column, first, a component panel (hereinafter simply referred to as a control panel) reinforced with thick ends, a steel mold for producing a precast, or the like is used. After pre-assembly, insert the pre-assembled rebar inside the outer formwork, and then perform the formwork assembly and rebar arrangement work by the procedure of inserting the inner formwork inside the pre-assembled rebar, from the top It was manufactured by pouring concrete. Such procedures are described in, for example, JP-A-62-233206 and JP-A-5-27.
8022 and JP-A-4-186131.

[0005]

However, in the above-described conventional manufacturing procedure, every time one hollow PCa column is manufactured, a mold setting operation and a demolding operation are required for each mold surface. At the same time, skill is required for the work because the installation accuracy of the formwork is required. Therefore, improvement in manufacturing efficiency cannot be expected, and as a result, there has been a problem that cost reduction cannot be achieved.

In order to solve such a problem, for example, Japanese Unexamined Patent Publication No. 6-317016 discloses an example of on-site construction in which a solid concrete column is constructed. It has been proposed to form a pair of movable form units that share two form form surfaces, and combine these movable form units to form a rectangular column outer form form.

In addition to the mold apparatus described in the above-mentioned Japanese Patent Application Laid-Open No. 6-317016, it can be applied as an outer mold apparatus when manufacturing a hollow PCa column at a factory or on site. When multiple movable form units are prepared and hollow PCa pillars are manufactured by parallel operation, each movable form unit has a large support leg for supporting the form plate on the back. Because
As a whole, a large working space is required. In particular, in recent years, in order to save transportation costs, production tends to be performed at the site site space rather than factory production,
There is an urgent need for a method of efficiently manufacturing a hollow PCa column at a site while effectively utilizing a limited space.

[0008] In the movable mold unit, consideration must be given to the accuracy of setting the mold for each product. In other words, each time a PCa member is manufactured, it is necessary to assemble the form while paying sufficient attention to whether or not a predetermined form accuracy is secured. However, if it is not fixed firmly, there is a problem that the entire formwork apparatus may move during concrete placing.

[0009] Further, in the case of casting from the upper opening of the mold in connection with the filling of concrete, a vibrator or the like is substantially inserted into a narrow space between the inner mold and the outer mold to uniformly compact the concrete. The problem arises that it is difficult to perform Therefore, it is conceivable to fill high-fluidity concrete, which can substantially eliminate compaction, by press-fitting from the lower injection port, but in this case, concrete will be press-fitted to the top at a stretch,
The condition is that the outer mold and the inner mold are firmly fixed so as not to be displaced. For this reason, there are problems that the upright holding mechanism of the inner mold and the outer mold is large, and that the installation and fixing of the inner mold takes a lot of trouble.

Therefore, a main object of the present invention is to provide a robust and high-precision assembling of a formwork apparatus which can easily and accurately install and fix an inner formwork and an outer formwork without skill. It is an object of the present invention to provide a formwork apparatus capable of realizing a high-quality hollow PCa member with high work efficiency while effectively utilizing a limited space.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a base form fixedly disposed at an intermediate position on rail equipment, and a base form which is self-supported by inserting a lower end into the base form. And a movable outer mold which is disposed on both sides of the base mold and is movable along the rail equipment.

The base form includes an outer base form also serving as a bottom form, and an inner form for forming a lower end fitting groove of a rectangular inner form in plan view around the inside of the outer base form. What consists of a base formwork is used suitably.

[0013] In addition, an opening frame into which the upper portion of the inner mold is inserted, and at least the upper frame is coupled to the movable outer frame, thereby separating the inner frame from the movable outer frame at the upper position of the mold. By using the closing formwork for securing the formwork accuracy, the formwork accuracy can be ensured even at the upper position of the formwork. As described later, the closing formwork can improve the working efficiency by also using a hanging jig for lifting the pre-assembled rebar.

In the present invention, a base form preferably serving also as a bottom form is fixedly arranged in the middle of the rail equipment, and the inner form is inserted into the base form so that its lower end is supported by itself. On the other hand, the outer formwork is a movable formwork that can move on rail equipment. Therefore, the inner mold is precisely positioned at a predetermined position by the base mold, and the movable outer mold is moved to a position where the outer mold is brought into close contact with the outer side surface of the base mold. By joining the outer formwork, it is positioned at a predetermined position. Also, the inner mold serving as a core is fixedly arranged so as not to be movable by the base mold fixed to the rail facility, and the movable outer mold is also fixedly arranged so as not to be movable due to the presence of the base mold. As a result, large-scale support facilities can be eliminated,
It is possible to easily assemble the formwork with high precision without skill. Further, the hollow PCa member can be efficiently manufactured by repeating a series of operation steps.

[0015] In addition, the construction is very suitable in relation to the construction in which concrete is filled by press-fitting. That is, when concrete is filled by press-fitting, the concrete is press-fitted all at once to the uppermost portion, so that the structure becomes large in the case of ordinary form support. However, in the case of the present invention, the movable outer form is fixed firmly so as not to move by the presence of the base form, and the inner form is fixed at the lower end position by the base form fixedly arranged on the rail equipment. Is restrained and the upper position is restrained by the closing formwork, so that the formwork apparatus does not shift even if it receives a lateral pressure due to concrete.

On the other hand, when the hollow PCa member to be manufactured has a rectangular cross section, it is desirable that the movable outer frame has an L-shape in plan view so as to share two adjacent sides. By making the plane shape an L-shape, the stability in the standing state and in the movement is increased, so that the standing auxiliary members such as stays are not required, and the moving direction of the moving outer formwork is changed on the concrete surface when removing the mold. Therefore, the separation from the concrete surface can be effectively performed.

On the other hand, when an insert is provided on the outer surface of the hollow PCa member to be manufactured, an insert installation jig is provided on the movable outer formwork. As the insert installation jig, a closing member capable of closing a through hole formed in a weir plate at a tip end of a bolt member attached to a supporting member and capable of retreating, and an insert on an outer surface of the closing member The one provided with an insert holding tool consisting of a threaded portion on which a thread is provided is suitably used.

[0018]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic perspective view of a mold apparatus 1 for manufacturing a hollow PCa member according to the present invention, FIG. 2 is a side view of a mold assembly state, and FIG. 3 is a plan view of the mold assembly state.

As shown in FIGS. 1 to 3, the formwork apparatus 1 includes a rail equipment 4 composed of three rail members 4A to 4C laid on a concrete work floor F, and a schematic structure of the rail equipment 4. A base form 9 fixedly arranged at a central position, an inner form 2 which is independently supported by inserting a lower end into the base form 9, and arranged on both sides of the inner form 2, respectively. This is a formwork apparatus including a pair of left and right movable outer formworks 3A and 3B that are movable along the rail equipment 4.

The movable outer frame 3A (the same applies to 3B) has a main body 10 having a running body 10A at a lower end thereof and capable of running on a central rail 4B, and a running body 12A at a lower end, and a side rail 4A. (4C) Auxiliary columns 12, 12 which can be freely run on the main column 10 and auxiliary columns 12, 1
, And the column clamps 11, 11,... Arranged in two orthogonal directions over a plurality of stages in the height direction with the traveling rail direction being diagonal in plan view. And a steel wall panel 14 disposed on an L-shaped wall formed by the above method. In the case where the hollow PCa member is manufactured at a time when the outside air temperature is low, as shown in FIG.
It is desirable to attach the heat insulating material 17.

As shown in the figure, the inner mold 2 is assembled and fixedly erected and supported by the base mold 9 fixedly provided at the center of the rail equipment 4, and then the outer molds 3A, 3B are fixed to the inner molds from both sides thereof. The column clamp fastener 1 provided at the tip of the column clamps 11 of the movable outer mold frame 3B by approaching the frame 2
3 is engaged with a receiving bracket of the other movable outer mold frame 3A so that the movable outer mold frames 3A and 3B are firmly connected to each other, and the closing mold frame is closed between the inner mold frame 2 and the movable outer mold frames 3A and 3B. 15 is installed, the high-fluidity concrete is applied to the pressure inlet 1 at the lower end.
By injecting from Step 6, a hollow PCa member is manufactured. The specific manufacturing procedure will be described later in more detail.

The inner mold 2 is, as shown in FIG.
The rail equipment 4 is immovably fixed to the rail equipment 4 by a base form 9 fixedly arranged at a substantially central position of the rail equipment 4.

As shown in detail in FIG. 5, the base form 9 is an outer base form 9A formed by using an inverted L-shaped cross section so that the horizontal flange surface becomes a bottom form.
And an inner base form 9B arranged inside the outer base form 9A. The inner form 9A and the inner base form 9B each have a rectangular shape in plan view. A frame fitting groove M is formed.
The outer base form 9A has fixing base plates 9a, 9a,... Fixed to each corner and the center of each side, respectively, and is fixed to the rail equipment 4 by bolts. Similarly, the inner base form 9B also has a fixing base plate 9 at each corner.
are fixedly mounted, and are fixed to the rail equipment 4 by bolts. It should be noted that one bolt hole 9 is provided on each of the left and right sides of the outer base form 9A.
c, 9c are formed, and as shown in FIG. 8, the steel damping panels 14 of the movable outer forms 3A, 3B are fixed to the side surfaces of the outer base form 9A by bolts 18 in close contact therewith. I can do it. The adhesion can be made perfect with respect to this contact surface by interposing an extremely thin film.

On the other hand, as shown in FIGS. 6 and 7, for example, as shown in FIGS. 6 and 7, four face panels 7A to 7D and four corner panels 8A -8D and four buffer panels 6A-6
D and one air tube 5 are used.

The face panels 7A to 7D are respectively composed of a face plate 20 having a relatively small width and a face plate 2 having a relatively large width.
Are formed on the front surface of the face plate 20 located on the front surface side, and a number of cotters 23 projecting outward at appropriate intervals in the vertical direction are formed on the front surface of the face plate 20 located on the front surface side. ing. The cotter 23 is for ensuring adhesion to concrete cast into the hollow space of the hollow PCa column. On the back side of the face plate 21 located on the back side, two lip groove type reinforcing members 22, 22 are integrally fixed. As will be described later, the lower end of the lip groove-shaped reinforcing member 22 is provided with a taper 22a so as to be easily inclined inward when the face panels 7A to 7D are disassembled.

Next, the corner panels 8A to 8D
Combines a relatively large L-shaped member and a relatively small L-shaped member inside the L-shaped member,
It is a columnar member having steps formed at both ends thereof to be engaged with steps of the face panels 7A to 7D.

The face panels 7A to 7D and the corner panels 8A to 8D are assembled into a rectangular frame shape while engaging the steps with each other, and then assembled together, or the face panels 7A to 7D and the corner panel 8A are assembled. To 8D are assembled in the inner form fitting groove M of the base form 9 while assembling them sequentially, and then the buffer panels 6A to 6D are arranged at the rear side positions of the face panels 7A to 7D with respect to the inner form fitting groove M. By inserting the air tube 5 into the inner space while inserting the 6D, the air tube 5 is supported upright as shown in FIG. FIG. 8 shows a cross-sectional structure of the lower end portion of the inner mold frame 2 in a state where the inner mold frame 2 is installed and the movable outer mold frames 3A and 3B are installed.

According to the inner mold 2 having such a structure, first, the corner panels 8A to 8D are positioned at a high vertical position with respect to a predetermined plane position (corner portion) due to the relationship with the base mold 9 described above. The positioning is performed with high accuracy, and the surface panels 7A to 7D that are installed while the steps are engaged with the corner panels 8A to 8D are also indirectly and precisely positioned at predetermined positions. In addition, by receiving an outward pressure from the air tube 5 inserted and installed on the back side, the air tube 5 is installed immovably at a predetermined position. Further, at the time of disassembly, if the compressed air of the air tube 5 is released, there is an advantage that the face panels 7A to 7D and the corner panels 8A to 8D can be easily removed from the mold. In this example, the inner mold 2 having the above structure is used.
However, any structure can be used as long as it is supported independently by inserting the lower end into the base form 9 in accordance with the gist of the present invention.

On the other hand, when burying an insert in a hollow PCa column member to be manufactured, an insert installation jig 34 shown in FIG. 12 is preferably used. The insert installation jig 34 is fixed to the outside of the weir plate 14 by welding or the like, and has a U-shaped section 35 serving as a bolt support member, and is fixed to an outer flange surface of the U-shaped section 35. Nut member 36, a bolt member 37 screwed from the nut member 36, a spring member 38 externally fitted to a screw portion of the bolt member 37, and an insert fixed to a screw tip of the bolt member 37. And a holder 39. The insert holder 39 includes a closing member 39a capable of closing a through hole formed in the weir plate, and a closing member 39a.
and a threaded portion 39b on which the insert 40 is screwed on the outer surface of the portion a. As shown in FIG. 12, an insert 40 is screwed into the insert holder 39, and the bolt member 37 is screwed into the insert holder 39.
Is closed by the closing body 39a of the damper panel 14. Then, after the concrete is filled and its hardening is waited, the bolt member 37 is removed at the time of demolding.
By screwing the insert holding tool 39,
Separate from the buried insert 40.

Hereinafter, the hollow P
Procedures for manufacturing Ca column member FIGS. 14 to 1
6 will be described in detail.

First, as shown in FIG. 14 (A), the movable outer molds 3A and 3B are separated from the base mold 9 respectively, and the fitting groove M of the base mold 9 is used. To assemble the inner mold 2.

When the assembly of the inner mold 2 is completed, the shear reinforcing bars are arranged around the inner mold 2 at appropriate intervals in the height direction. 14 (B) and FIG. 14 (C), using a closing mold 15 which also serves as a suspending jig, and installs a pre-assembled reinforcing bar D around the inner mold 2 at a stretch. It is desirable to do. By fixing the closing form 15 to the inner form 2, the position of the reinforcing bar D is also determined accurately, and the movable outer forms 3 A, 3 B are separated from the inner form 2, so that the pre-assembly is performed. The arrangement state of the reinforcing bars D can be visually confirmed.

As shown in detail in FIG. 9, the closing mold 15 has a rectangular opening into which the upper part of the inner mold 2 is inserted, and is formed in a rectangular shape. Board 2
5 is a hanging jig main body, and on the upper surface side, an angle member 26A having an L-shaped cross section, which is disposed and fixed along the longitudinal direction of the member on each side and the upright wall surface is aligned with the opening edge of the rectangular frame plate. 26D, the suspension pieces 28 are fixed to one set of the opposite members of the angle members 26A to 26D, and two pieces of U are provided on each side.
It is provided with tightening plates 27, 27 having letter-shaped notches.

The rectangular frame plate 25 will be described in more detail below. The opening dimensions of the rectangular frame plate 25 are the same as those of the inner frame 6 described above so that the rectangular frame plate 25 can be used as it is as a closing mold frame for manufacturing hollow PCa columns. It is almost the same size as the external dimensions,
The width of each side is at least equal to or greater than the wall thickness of the hollow PCa column to be manufactured. In this example, in order to fix the rectangular frame plate 25 to the upper surface of the outer mold frame, the wall thickness of the hollow PCa column member + the width of the steel dam panel panel 14 is set.

At each corner of the opening of the rectangular frame plate 25, a notch 25a for inserting a vertical streak into which a vertical streak is inserted,
.. Are formed. Notch 2 for fitting this vertical streak
5a is a notch provided so that a vertical streak may be arranged in the concrete casting space, and also serves as an air vent hole when concrete is cast. When the closing form 15 is used for normal suspension other than the hollow PCa column, the notches 25a, 25a,.
Can be saved. In addition to the air vent holes, angle members 26A to 26A-2
6D together with the rectangular frame plate 8 and three places on each side (reference numeral 2).
5b) are formed one by one.

As shown in FIG. 10, the vertical reinforcing bars D are suspended by inserting the vertical reinforcing bars 30 arranged at the respective corners of the pre-assembled reinforcing bars D into the rectangular frame plates 25 for fitting the vertical reinforcing bars. Once fitted into the portion 25a, at the upper surface side of the rectangular frame plate 25, for example, the nut 31 is screwed to the longitudinal reinforcing bar 30, and the sleeve 32 is screwed and completely fixed.

When the mounting of the closing form 15 to the pre-assembled reinforcing bar D is completed, a hanging wire is connected to a hanging piece 28 provided on the closing form 15 via a shackle or the like.
As shown in FIG. 14 (B), the pre-assembled reinforcing bar D is inserted into the already assembled inner formwork 2 and the inner formwork 2 is inserted into the opening of the square frame plate 25 as shown in FIG. By inserting the upper part of the inner form 2, the pre-assembled reinforcing bar D is automatically positioned at a predetermined position, and the periphery of the inner form 2 is restrained by the rectangular frame plate 25. Since the vertical streaks 30, 30... At the four corners are accommodated in the cutouts 25a, 25a for fitting the vertical streaks of the rectangular frame plate 25, they become obstacles when dropping the pre-assembled rebar D. There is no.

When the setting of the shear reinforcement on the inner mold 2 is completed in the above manner, the movable outer molds 3A and 3B are removed as shown in FIGS. Each is made to approach the inner mold 2 side. When the movable outer molds 3A, 3B are firmly connected to each other by the column clamp fasteners 13, 13,...
As shown in FIG. 1, the clamp fastener 33 provided on the upper part of the movable outer forms 3A and 3B is engaged with the tightening plate 27 formed on the closing form 15, and the closing form 15 is moved to the movable outer form 3A. 3
Tighten to B.

When all the formwork installation work is completed by the above steps, as shown in FIG. 15 (F), the concrete hose 42 drawn out of the concrete pump 41 is connected to the pressure inlet 16 and the high flow rate is set. Pump concrete. After that, it is confirmed that the concrete has leaked from the confirmation hole 25b formed in the closing formwork 15, and the concrete placing operation is completed.

Then, after the concrete has hardened, the mold is removed. Demolding is performed by first moving outer molds 3A, 3B
Before separating from the inner mold 2, the inner mold 2 is dismantled.
To disassemble the inner mold 2, first, the compressed air filled inside is removed, and the air tube 5 is removed. At this time, since the air tube 5 is protected by the buffer panels 6A to 6D, it can be easily and safely removed without being caught by the reinforcing member 22.

Next, after the buffer panels 6A to 6D are pulled out and removed, horizontal external force is applied to the upper ends of the surface panels 7A to 7D protruding above the top ends of the outer mold frames 3A and 3B, and the reinforcing members 22 are formed. With the lower end (point P) as a fulcrum, the face panels 7A to 7D are turned inward and peeled from the concrete surface. At the time of the inward fall, the taper 22a is formed in advance at the lower end of the reinforcing member 22, and the buffer panels 6A to 6D are removed and "play" is secured, so that the face panels 7A to 7D tilt. Can be easily performed.

After the inner mold 2 is completely dismantled by the above steps, the movable outer molds 3A and 3B are unfastened by the column clamp fasteners 13 and the closing mold 15 is closed.
And release the movable outer frames 3A and 3B with the hollow PC.
After peeling off from the pillar a, as shown in FIG.
Hollow PCa manufactured using a 4t Unic car
Pillars are stacked on a carrier and transported to a designated stock location. By repeating the above process as one cycle, a large number of hollow PCa columns can be efficiently manufactured.

In the present formwork apparatus 1, the movable outer forms 3A, 3B
Are formed in an L-shape in plan view so as to share two adjacent sides as one set, but as shown in FIG. 17, one of the movable outer forms 3A 'is The outer mold frame having a U-shape in plan view may be used as one set, and the other movable outer mold frame 3B 'may be a planar outer mold frame sharing only one side. Furthermore, the outer shape of the hollow PCa column to be manufactured is not limited to a square shape, and a hollow PCa column having a polygonal shape such as a pentagon or a hexagon can be manufactured, and the hollow PCa column can be hollow. In addition to the PCa column member, the present invention can be applied to any hollow PCa member such as a PCa box culvert, a hollow wall, and a concrete square tube.

[0044]

As described in detail above, according to the present invention, it is possible to easily and accurately install and fix the inner formwork and the outer formwork without skill, and to provide a robust and high-precision formwork. As well as realizing the assembly of the device, it is possible to manufacture a high-quality hollow PCa member with high working efficiency while effectively using the limited space.

[Brief description of the drawings]

FIG. 1 shows a formwork apparatus 1 for manufacturing a hollow PCa member according to the present invention.
It is a schematic perspective view of.

FIG. 2 is a side view of a form assembly state.

FIG. 3 is a plan view of a mold assembly state.

FIG. 4 shows the rail equipment 4 and the base form 9 (A).
Is a plan view, (B) is a side view, and (C) is a front view.

5 (A) is a plan view and FIG. 5 (B) is a side view showing the base formwork 9;

FIG. 6 is a perspective view showing the inner mold 2;

FIG. 7 is an exploded view of the inner mold 2;

FIG. 8 is a cross-sectional view of a main part showing how the lower end of the formwork fits in assembling the formwork.

FIG. 9 is a plan view of the closing mold 15;

FIG. 10 is a side view of the closing mold 15 showing a suspended state of the pre-assembled rebar D at the same time.

11 is a cross-sectional view of a main part showing a tightening procedure of the closing mold 15; FIG.

FIG. 12 is a sectional view showing an insert setting jig 34.

FIG. 13 is a cross-sectional view showing the operation procedure of the insert setting jig 34 when removing the mold.

FIG. 14 is a manufacturing procedure diagram (part 1) of a hollow PCa member.

FIG. 15 is a manufacturing procedure diagram (part 2) of the hollow PCa member.

FIG. 16 is a manufacturing procedure diagram (part 3) of the hollow PCa member.

FIG. 17 is a perspective view showing a modified example of the movable outer formwork.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Form device, 2 ... Inner form, 3A / 3B ... Moving outer form,
4 rail equipment, 9 base mold, 9A outer base mold, 9B inner base mold, 15 closing mold, 34 insert jig

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Satoru Kondo 47-3 Mita, Atsugi-shi, Kanagawa Prefecture Sato Kogyo Co., Ltd. (72) Inventor Kazuya Urakawa 47-3 Mita, Atsugi-shi, Kanagawa Sato Kogyo Co., Ltd. (72) Inventor Yuji Wakabayashi 47-3 Mita, Atsugi-shi, Kanagawa Prefecture Sato Industrial Co., Ltd. (72) Inventor Toshiyuki Omori 1711-1 Tanayanagi Kubo, Sagamihara-shi, Kanagawa Co., Ltd. Inside the KM Sagamihara Plant (56) References JP-A-62-233206 (JP, A) JP-A-53-94413 (JP, A) JP-A-55-75057 (JP, A) JP-A-5-118134 (JP) JP-A-5-278022 (JP, A) JP-A-4-186131 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B28B 21/06 B28B 21/82 B28B 21/86 E04G 13/02

Claims (6)

(57) [Claims] 1. A base form fixedly arranged at an intermediate position on rail equipment, an inner form supported by a lower end thereof being inserted into the base form, and an inner form supported on both sides of the base form. And a movable outer formwork that is movable along the rail equipment. 2. The base mold according to claim 1, further comprising an outer base form serving also as a bottom form, and an inner form lower end fitting groove having a rectangular shape in plan view formed around the inside of the outer base form. The hollow PC according to claim 1, comprising an inner base form.
Forming device for a member production. 3. An inner frame having an opening frame into which an upper portion is inserted, and being coupled to at least the movable outer frame to separate the inner frame from the movable outer frame at the upper position of the frame. The mold apparatus for manufacturing a hollow PCa member according to any one of claims 1 and 2, further comprising a closing mold for securing the shape. 4. A mold apparatus for manufacturing a hollow PCa member according to claim 3, wherein said closing form also serves as a suspending jig for suspending a pre-assembled reinforcing bar. 5. The manufactured hollow PCa member has a rectangular cross section, and the movable outer frame has an L-shape in plan view so as to share two adjacent sides. A mold apparatus for manufacturing a hollow PCa member according to any one of the above. 6. The movable outer frame is a hollow PCa to be manufactured.
An insert installation jig for embedding an insert on the outer surface of the member is provided, and the insert installation jig is formed on a crest plate at a tip end of a bolt member attached to a support member and capable of retreating freely. The hollow PCa member according to any one of claims 1 to 5, further comprising an insert retainer including a closing body capable of closing the through hole, and a screw portion on which an insert is screwed on an outer surface of the closing body. Formwork equipment for manufacturing.