JP2001277232A - Mold device for precast pc plate, and manufacturing method for precast pc plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mold device for a precast PC plate, by which the production efficiency can be increased. SOLUTION: This mold device 1 comprises a mold 3 and a moving means 4. The mold 3 manufactures concrete plates 6 under a vertically laid state wherein a plurality of concrete plates 6 are erected in such a manner that the plate surfaces may be confronted to each other. The mold 3 is equipped with partition members 3e, 3f, 3f which partition a space between the side frames 3a, 3a into respective forming spaces 7, 7 to form the concrete plates 6, 6. The moving means 4 moves the concrete plates 6, 6 in the direction wherein the end frame 3b, 3b are confronted to each other, together with the mold 3. In the manufacturing of the precast PC plate, the mold device 1 is arranged in a space between stretching based 10, 10 which support stretching materials 2, 2 in such a manner that the direction wherein the end frames 3b, 3b are confronted to each other may meet the confronted direction of the stretching based 10, 10. After laid concrete C1, C2 is hardened, the stretching materials 2, 2 are loosened. At the same time with the loosening, the concrete plates 6, 6 are moved by the moving means 4 in the direction wherein the end frames 3b, 3b are confronted to each other, together with the mold 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a precast PC board formwork apparatus and a method for manufacturing a precast PC board, which can increase production efficiency.

[0002]

2. Description of the Related Art Conventionally, as a formwork of a precast PC board (precast prestressed concrete board), for example, there has been one shown in FIG. 7 and FIG. The bottom frame 22, the side frame 23, and the end frame 24 were configured to manufacture the formwork 21 in a flat-hit state in which a precast PC board was laid down. In manufacturing a precast PC board using the formwork 21, the formwork 21 is placed between the tension tables 25, 25 as shown in FIG.
Are set in such a way that the direction in which they face each other is the same as the direction in which the tension tables 25 and 25 face each other.
From the other to the tension table 25. Further, with the disposition of the molds 21, 21, the tension members 26 were passed between the tension tables 25, 25 and tensed so as to penetrate the respective molds 21, 21. Then, concrete 27 is poured into the formwork, and the concrete 2
7 was cured to form a concrete plate 28. Next, the side frames 23, 23 are opened right and left, and the tendons 26, 26
Was relaxed. At this time, at the same time as the tension members 26 are loosened, the tension members 2 between the concrete plates 28
Since the elongation of 6, 26 returned, the concrete plate 28 slid on the bottom frame 22 and moved in the direction in which the tendons 26, 26 were stretched, that is, in the direction opposite to the end frames 24, 24. Also, the tendon 2 placed in the concrete plate 28
Similarly, the elongation of 6, 26 tends to return, but due to the adhesion to concrete, the prestress is introduced by the contraction of the concrete plate 28, and the precast P
It became a C plate.

[0003]

By the way, in the above-mentioned conventional precast PC board formwork 21 and manufacturing method, at the same time as the tension members 26, 26 are loosened, the concrete board 28 moves on the bottom frame 22. Although it moves, in order to ensure the stability of the concrete plate 28 at that time, it was necessary to manufacture the precast PC plate in a flat-sided state with the sideways. Therefore, a large space is required for manufacturing the precast PC board, and the production efficiency cannot be increased.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional disadvantages, and an object of the present invention is to provide a precast PC capable of improving production efficiency.
It is an object of the present invention to provide a plate formwork apparatus and a method for manufacturing a precast PC board.

[0005]

A precast PC board formwork apparatus and a method of manufacturing a precast PC board according to the present invention have the following constitutions to achieve the above object. That is, the formwork apparatus for a precast PC board (precast prestressed concrete board) according to the invention of claim 1 is a formwork for manufacturing a precast PC board in which prestress is introduced via a tension member by a pretensioning method. An apparatus, comprising: a formwork for manufacturing a concrete plate before the introduction of prestress, which is to be the precast PC plate, in a vertically struck state in which a plurality of standing concrete plates are opposed to each other, and moving means. The formwork includes a side frame, a wife frame, a bottom frame, and a partition member for partitioning between the side frames into respective forming spaces forming the concrete plate. And the moving means, the concrete plate,
At least together with the partition member, it can be moved in a direction facing the end frame.

Accordingly, in manufacturing the precast PC board, the form device is placed between the tension tables supporting the tension members so that the facing direction of the end frame coincides with the facing direction of the tension table. In other words, by placing the tendon in the same direction as the tensioning direction, after the cast concrete has hardened and turned into a concrete plate, when the tensioning material is loosened,
At the same time, the concrete board is
At least with the partition member, the facing direction of the wife frame,
In other words, the tendon moves in the stretched direction. Thus, the prestress is introduced into the concrete board, and the precast PC board is manufactured. Here, when moving the concrete plate to be erected, at least the concrete plate
Since it moves together with the partition member between the concrete plates, the standing concrete plate can be moved stably.

According to a second aspect of the present invention, there is provided a formwork apparatus for a precast PC board (precast prestressed concrete board) in which prestress is introduced through a tension member by a pretensioning method.
A formwork apparatus for manufacturing a board, wherein the precast PC
It comprises a formwork for manufacturing a concrete plate before the introduction of prestress, which is a plate, in a vertically struck state in which a plurality of standing concrete plates are opposed to each other with their plate surfaces facing each other, and moving means. The formwork includes a side frame, a wife frame, a bottom frame, and a partition member for partitioning between the side frames into respective forming spaces forming the concrete plate. And the moving means, the concrete plate,
Along with the formwork, it is possible to move in a direction facing the wife frame.

Accordingly, in manufacturing the precast PC board, the form device is placed between the tension tables supporting the tension members such that the direction in which the end frame faces the same direction as the tension table. In other words, by placing the tendon in the same direction as the tensioning direction, after the cast concrete has hardened and turned into a concrete plate, when the tensioning material is loosened,
At the same time, the concrete board is
Along with the formwork, it moves in the direction facing the wife frame, that is, the direction in which the tendon is stretched. Thus, the prestress is introduced into the concrete board, and the precast PC board is manufactured. Here, when the standing concrete plate is moved, the concrete plate moves together with the formwork, so that the standing concrete plate can be moved very stably.

According to a third aspect of the present invention, as in the precast PC board formwork apparatus, in the formwork apparatus according to the second aspect, the moving means may include a lower surface of the bottom frame or It may be composed of a synthetic resin plate attached to one of the arrangement surfaces on which the formwork is arranged, and a metal plate attached to either the lower surface of the bottom frame or the other of the arrangement surfaces. Thereby, the movement of the mold is performed by a synthetic resin plate attached to one of the lower surface and the arrangement surface of the bottom frame, and a metal plate attached to one of the other.
This is done by relative sliding.

According to a fourth aspect of the present invention, there is provided a method of manufacturing a precast PC board, wherein a plurality of concrete boards are provided in a vertical standing state in which a plurality of standing concrete boards are opposed to each other. A method for manufacturing a precast PC board, comprising using a mold provided with a partition member for partitioning the frames into respective forming spaces for forming the concrete board,
Between the tension tables supporting the tension members, the formwork is arranged so that the direction in which the end frames face each other coincides with the direction in which the tension tables oppose each other, and the tension members are placed in the formation space. Passing between the tension tables so as to penetrate, and tension, and then concrete is poured into the forming space,
Next, after the concrete has hardened into the concrete plate, the tension member is loosened, and at the same time, the concrete plate is moved at least with the partition member in a direction opposite to the end frame, whereby the concrete plate is moved. To produce a precast PC board (precast prestressed concrete board).

In this way, when the prestress is introduced into the standing concrete plate by loosening the tendon, the concrete plate, together with at least the partition member between the concrete plates, faces the opposite direction of the end frame, ie, the tendon. Move in the direction in which In this way, the concrete plate moves at least with the partition member between the concrete plates, so that the standing concrete plate can be moved stably.

According to a fifth aspect of the present invention, there is provided a method of manufacturing a precast PC board, wherein a concrete board is manufactured in a vertically strung state in which a plurality of standing concrete boards are opposed to each other. A method for manufacturing a precast PC board, comprising using a mold provided with a partition member for partitioning the frames into respective forming spaces for forming the concrete board,
Between the tension tables supporting the tension members, the formwork is arranged so that the direction in which the end frames face each other coincides with the direction in which the tension tables oppose each other, and the tension members are placed in the formation space. Passing between the tension tables so as to penetrate, and tension, and then concrete is poured into the forming space,
Next, after the concrete has hardened to become the concrete plate, at the same time as the tension member is loosened, the concrete plate is moved together with the formwork in the direction opposite to the end frame, so that the concrete plate is Prestress is introduced to manufacture a precast PC board (precast prestressed concrete board).

When the prestress is introduced into the concrete plate to be erected by relaxing the tendon, the concrete plate, together with the formwork, is moved in the direction facing the end frame, that is, in the direction in which the tendon is stretched. Moving. As described above, the concrete plate moves together with the formwork, so that the standing concrete plate can be moved very stably.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a precast PC board formwork apparatus and a method for manufacturing a precast PC board according to the present invention will be described below with reference to the drawings.

1 to 6 show an embodiment of a precast PC board formwork apparatus and a method for manufacturing a precast PC board according to the present invention. Reference numeral 1 in the figure denotes a formwork apparatus for manufacturing a precast PC board (precast prestressed concrete board) into which prestress has been introduced via a tension member 2 such as a PC steel material by a pretension method. The form device 1 includes a form 3 and a moving unit 4. Reference numeral 5 denotes an arrangement surface on which the mold 3 is arranged.

Here, as shown in FIGS. 4 to 6, the formwork 3 is composed of a plurality of concrete plates 6 (not shown) having pre-stress-introduced precast PC plates facing each other. In this embodiment, four pieces are manufactured. And this form 3
Are side frames 3a, 3a, wife frames 3b, 3b, and bottom frame 3c.
And upper frames 3d, 3d, and partition members 3e, 3f, 3f for partitioning between the side frames 3a, 3a into respective forming spaces 7, 7 forming the concrete plates 6, 6. That is, the side frames 3a, 3a are located outside of the forming spaces 7, 7 located on both sides of the respective forming spaces 7, 7.
In addition, the wife frames 3b, 3b are located on the horizontal sides of the forming spaces 7, 7 in which the forming spaces 7, 7 extend. The bottom frame 3c is located below the forming spaces 7, 7, and the upper frames 3d, 3d are located above the forming spaces 7, 7.

The moving means 4 moves the concrete plates 6, 6
Along with the mold frame 3, it is made movable in the opposite direction of the end frames 3 b, 3 b. Specifically, a synthetic resin plate 8 such as a polytetrafluoroethylene plate adhered to the lower surface of the bottom frame 3 c, And a metal plate 9 such as a stainless steel plate attached to the surface 5.

Next, a method of manufacturing a precast PC board using the formwork apparatus 1 having the above-described configuration will be described together with its operation and effects. First, as shown in FIG. 1, the form device 1 including the form 3 is placed between the tension tables 10 and 10 supporting the tension members 2 and 2 so that the facing directions of the end frames 3 b and 3 b correspond to the tension tables. So that the direction coincides with the facing direction of 10,
In other words, the tension members 2 and 2 are arranged so as to be in the same direction as the tension members 2, 2, and the tension members 2, 2 are attached to the above-described formation spaces 7, 2.
7 and pass it between tension tables 10 and 10 and
Tension is applied by jacks (not shown), and concretes C1 and C2 are poured into the forming spaces 7 and 7 (however, FIG. 1 is a schematic diagram in which the description of the upper frame 3d is omitted). In the illustrated embodiment, a plurality of formwork devices 1 are provided between the tension tables 10 and 10 so as to be arranged from one tension table 10 to the other tension table 10.

Here, in assembling the formwork apparatus 1, first, as shown in FIG. 2, the bottom frame 3c is placed on the metal plate 9 attached to the arrangement surface 5. At this time, a synthetic resin plate 8 is previously attached to the lower surface of the bottom frame 3c, and the synthetic resin plate 8 contacts the metal plate 9. Then, a partition member 3e is attached to the center of the bottom frame 3c.
Thereafter, as shown in FIG. 3, the end frames 3b, 3b are attached so as to be hooked on the bottom frame 3c and the partition member 3e (however, in FIGS. 3 to 6, for convenience, the end frame 3
b is omitted from the description). Then, the tension members 2, 2 are passed through the wife frames 3b, 3b, and
Pass between 0 and 10, and further set up the reinforcing bars 11,11.
Then, as shown in FIG. 4, the central partition member 3e
The other partition members 3f, 3f are inserted so as to be positioned on both sides of the partition member 3f, and the upper ends of the partition members 3f, 3f are held by the width determining members 12, 12 supported by the partition member 3e. Then, the side frames 3a, 3a are attached to the bottom frame 3c.
In this way, the above-described forming spaces 7, 7 include the bottom frame 3c, the side frames 3a, 3a, the end frames 3b, 3b, the partition members 3e, 3f,
3f.

Next, as shown in FIG.
Then, concrete C1 is cast near the upper ends of the forming spaces 7,7. Then, as shown in FIG.
a, 3a and a central partition member 3e, an upper frame 3d,
3d, upper frame 3d, 3d and partition member 3
f, 3f to the upper ends of the forming spaces 7, 7
Further, concrete C2 is cast. Then, the upper end of the cast concrete C2 is ironed.

Therefore, as shown in FIG. 1, after the cast concrete C1, C2 hardens to form concrete plates 6, 6, when the tension members 2, 2 are loosened, at the same time, the concrete plates 6, 6, Is moved together with the form 3 by the moving means 4 in the direction in which the end frames 3b, 3b are opposed, that is, in the direction in which the tendons 2, 2 are stretched. That is, the mold 3 including the concrete plates 6 and 6 is formed via the synthetic resin plate 8 attached to the lower surface of the bottom frame 3c constituting the mold 3.
It moves so as to slide on the metal plate 9 attached to the arrangement surface 5. In this way, prestress is introduced into the concrete plates 6, 6, and a precast PC plate is manufactured. Here, since the concrete plates 6, 6 move together with the formwork 3 when the standing concrete plates 6, 6 move, the concrete plates 6, 6 standing up can be moved very stably. Moreover, the movement of the concrete plates 6 and 6 is performed by the synthetic resin plate 8 and the metal plate 9.
And can be easily achieved by relative sliding. As described above, even in the case where the precast PC board is manufactured in a vertically struck state in which the precast PC board is erected, it is possible to stably move the concrete boards 6 when introducing the prestress. In this way, it is possible to manufacture a plurality of (4 in the illustrated embodiment) precast PC boards per formwork in the vertically struck state, so that a large space is not required for the manufacture and the precast PC board is limited in a limited space. P
Since a large number of C boards can be manufactured, the production efficiency of this precast PC board can be increased. further,
By manufacturing the precast PC board in a vertically upright state, the iron finishing area can be reduced, and when it is necessary to form irregularities such as corrugations on the board surface of the precast PC board. Even if there is, the uneven shape can be formed by the mold 3 instead of rolling the roller having the corresponding uneven shape as seen in the flat-punching method.

After the prestress is introduced into the concrete plate 6, the tendons 2 and 2 are cut and released, and the precast PC plate is taken out of the formwork 3.
Here, when the mold is released, the tendons 2 and 2 have already been cut, so that the removal operation can be easily performed. In addition, it is not necessary to open the side frames in advance before introducing the prestress as in the conventional flat casting method, and since the demolding work can be performed at once after the introduction of the prestress, this precast PC Plate production efficiency can be further increased.

The present invention is not limited to the above-described embodiment, and various other modifications are possible. For example, the moving means 4 is composed of a synthetic resin plate 8 attached to the lower surface of the bottom frame 3c and a metal plate 9 attached to the arrangement surface 5, but on the contrary, a metal plate attached to the lower surface of the bottom frame 3c. 9 and a synthetic resin plate 8 attached to the arrangement surface 5, or a rotating member such as a roller provided between the lower surface of the bottom frame 3 c and the arrangement surface 5.

Further, the moving means 4 enables the concrete plates 6, 6 to move together with the formwork 3.
The concrete plates 6, 6 may be movable together with the partition members 3e, 3f, 3f in the direction opposite to the end frames 3b, 3b. In this case, concrete C1,
After the hardening of C2, for example, by opening the side frames 3a, 3a, the hardened concrete plates 6, 6 and the partition members 3e,
3f together with the moving means 4 (for example, a synthetic resin plate 8 such as a polytetrafluoroethylene plate attached to the lower surface of the partition members 3e, 3f and 3f, and a stainless steel plate attached to the upper surface of the bottom frame 3c). Through the bottom frame 3c through the metal plate 9).
The wife frames 3b, 3b may be moved in the opposite direction. By doing so, the concrete plates 6, 6 move together with the partition members 3e, 3f, 3f between the concrete plates 6, 6, so that the standing concrete plates 6, 6 can be moved stably. .

The mold 3 has an upper frame 3d. The upper frame 3d is not particularly required if the upper end surface of the concrete plate 6 is horizontal.

[0026]

As is apparent from the above description, the precast PC board formwork apparatus and the method for manufacturing a precast PC board according to the present invention have the following effects.

According to the precast PC board formwork device described in claims 1 to 3 and the precast PC board manufacturing method described in claims 4 and 5, the precast PC board is vertically erected. Even in the case of manufacturing in a state, the concrete plate can be moved stably when introducing the prestress. In this way, it is possible to manufacture a plurality of precast PC boards per form in a vertically struck state, and it is possible to manufacture a large amount in a limited space without requiring a large space for the manufacture.
Therefore, the production efficiency of this precast PC board can be increased.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of an embodiment of a precast PC board formwork apparatus and a method for manufacturing a precast PC board according to the present invention.

FIG. 2 is also a first front view showing the method for manufacturing a precast PC board.

FIG. 3 is a second front view showing the method for manufacturing a precast PC board.

FIG. 4 is a third front view showing the method of manufacturing the precast PC board.

FIG. 5 is a fourth front view showing the method for manufacturing a precast PC board.

FIG. 6 is a fifth front view showing the method for manufacturing a precast PC board.

FIG. 7 is a schematic front view showing a conventional precast PC board formwork.

FIG. 8 is a schematic view similarly in plan view.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Form device 2 Tensile material 3 Mold frame 3a Side frame 3b Wife frame 3c Bottom frame 3e Partition member 3f Partition member 4 Moving means 5 Arrangement surface 6 Concrete plate 7 Forming space 8 Synthetic resin plate 9 Metal plate 10 Tension table C1 Concrete C2 concrete

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4G053 AA07 BA04 BA09 BB09 EA04 EA50 EB02 EB05 EB16 4G055 AA01 AB00 AC01 CC11 4G058 GA01 GB02 GC01 GD06 GF12 GF30

Claims (5)

[Claims] 1. A formwork apparatus for manufacturing a precast PC board in which prestress is introduced through a tension member by a pretensioning method, wherein a concrete board before the prestress is introduced is used as the precast PC board. A formwork that is manufactured in a vertical striking state in which a plurality of faces are opposed to each other, and a moving means; and the formwork includes a side frame, a wedge frame, a bottom frame, and a space between the side frames. ,
A partition member for partitioning each of the formation spaces forming the concrete plate, wherein the moving means is capable of moving the concrete plate together with at least the partition member in a direction facing the end frame. , Precast PC board formwork device. 2. A formwork apparatus for producing a precast PC board into which prestress has been introduced through a tension member by a pretensioning method, wherein the precast pre-stressed concrete board is used as the precast PC board. A formwork that is manufactured in a vertical striking state in which a plurality of faces are opposed to each other, and a moving means; and the formwork includes a side frame, a wedge frame, a bottom frame, and a space between the side frames. ,
A partition member for partitioning into each forming space for forming the concrete plate, wherein the moving means enables the concrete plate to move together with the formwork in a direction opposite to the end frame. Forming device for precast PC board. 3. The formwork device according to claim 2, wherein the moving means is a synthetic resin plate attached to one of a lower surface of the bottom frame and an arrangement surface on which the formwork is arranged. A precast PC board formwork device, comprising: a metal plate attached to one of the lower surface of the bottom frame and the arrangement surface. 4. A partition member for partitioning between side frames into respective forming spaces for forming the concrete plate in order to manufacture a concrete plate in a vertically struck state in which a plurality of standing concrete plates are opposed to each other. A method for manufacturing a precast PC board, comprising using a formwork provided with the formwork, wherein a direction in which the form frame and the end frame of the formwork oppose each other corresponds to a direction in which the tension form is opposed between the tensioning tables supporting a tension member. And the tension member is passed between the tension tables so as to penetrate the formation space, and is tensioned, and concrete is poured into the formation space, and the concrete hardens. After the concrete plate is loosened, the tension member is loosened, and at the same time, the concrete plate is moved together with at least the partition member in a direction opposite to the end frame. Manufacturing a precast PC board by introducing a prestress into the precast PC board. 5. A partition member for partitioning between side frames into respective forming spaces for forming said concrete plate in order to manufacture a concrete plate in a vertically struck state in which a plurality of standing concrete plates are opposed to each other. A method for manufacturing a precast PC board, comprising using a formwork provided with the formwork, wherein a direction in which the form frame and the end frame of the formwork oppose each other corresponds to a direction in which the tension form is opposed between the tensioning tables supporting a tension member. And the tension member is passed between the tension tables so as to penetrate the formation space, and is tensioned, and concrete is poured into the formation space, and the concrete hardens. After becoming the concrete plate, the prestress is applied to the concrete plate by loosening the tendon and moving the concrete plate together with the formwork in the direction opposite to the end frame. A method for manufacturing a precast PC board, which is introduced to manufacture a precast PC board.