JP6925870B2 - PC parts manufacturing equipment - Google Patents

Description

The present invention relates to an apparatus for manufacturing a PC (prestressed concrete) member having a plurality of tension materials for PC (prestressed concrete) and to which prestress is introduced by a pretension method.

Patent Documents 1 and 2 disclose a PC member manufacturing apparatus in which prestress is introduced by a pretension method.

In the PC member manufacturing apparatus disclosed in Patent Document 1, a tension side abutment provided with a tension jack and a reaction force receiving side abutment that opposes the tension force are arranged to face each other at predetermined intervals, and the PC member is placed between these abutments. Abutment is installed. In this manufacturing apparatus, first, both ends of the PC steel wire are connected to the PC steel rods provided on both abutments via couplers, and the PC steel wire is hung between the abutments, and the PC is placed in the mold. Hang the steel wire. Then, after introducing tension (pretension) into the steel wire for PC with a tension jack, concrete is poured into the formwork. After the concrete has hardened, the tension on the steel wire for PC is released to obtain a PC member in which prestress is introduced into the concrete.

Further, Patent Document 2 describes a manufacturing apparatus for simultaneously manufacturing a plurality of PC members by arranging a plurality of formwork side by side in the extending direction of the steel wire for PC.

JP-A-2007-216503 Japanese Unexamined Patent Publication No. 2005-47233

The PC member manufacturing equipment as described in Patent Documents 1 and 2 is installed in a specific facility such as a factory, and has a tension side abutment so as to withstand the tension force at the time of introducing the tension force into the steel wire for PC. The reaction force receiving side abutment is fixed and installed. Further, this manufacturing apparatus is large in size in accordance with the manufacturing of a large PC member (the distance between the abutments is about several tens of meters, for example, about 50 m to about 70 m). When manufacturing a small PC member, a plurality of molds are arranged side by side as described in Patent Document 2, and a plurality of PC members are manufactured at the same time.
This manufacturing apparatus is suitable for applications in which a plurality of PC members are efficiently mass-produced at the same time.

By the way, there is a demand for high-mix low-volume production of PC members (production of different varieties, small lot production), and large-scale manufacturing equipment as described in Patent Documents 1 and 2 is not suitable for such applications.
In recent years, young people have moved away from the construction industry, and the shortage of skilled rebar and formwork workers and the decline in skills have become more serious. In order to save labor and improve productivity, it is important to increase the precast rate. It has become a challenge.

An object of the present invention is to provide a small and movable PC member manufacturing apparatus suitable for small-quantity production applications.

(1) The apparatus for manufacturing a PC member according to the present invention is an apparatus for manufacturing a PC member provided with a tension material for a PC and in which prestress is introduced by a prestressed method.
A plurality of tension force introducing member pairs consisting of a pair of a first tension force introducing member and a second tensioning force introducing member for introducing a tension force into the tension material for a PC.
A reaction force plate arranged between the plurality of tension force introducing member pairs and supporting the plurality of tension force introducing member pairs by receiving the reaction force at the time of introducing the tension force,
A first tension portion arranged on one side of the reaction force plate and into which a tension force is introduced between the plurality of tension force introducing member pairs,
A second tension portion arranged on the other surface side of the reaction force plate and into which a tension force is introduced between the plurality of tension force introducing member pairs,
With
In the plurality of tension force introducing member pairs, the first tension force introducing member is arranged along one side of the reaction force plate, and the second tension force introducing member is arranged along the other side facing the one side. It is composed by arranging multiple
One of the first tension portion and the second tension portion is applied to the tension material for PC.

(2) In the PC member manufacturing apparatus according to (1),
The reaction force plate may be arranged horizontally.
The plurality of tension force introducing member pairs may be arranged vertically so as to intersect the reaction force plate and may be arranged in the horizontal direction.

(3) In the PC member manufacturing apparatus according to (1),
The reaction force plate may be arranged vertically.
The plurality of tension force introducing member pairs may be arranged horizontally so as to intersect the reaction force plate and may be stacked in the vertical direction.

(4) The PC member manufacturing apparatus according to (3) may be configured to be provided with a tension material for another PC and to be able to manufacture another PC member to which prestress is introduced by a pretension method.
The other of the first tension portion and the second tension portion may be applied to the other tension material for PC.

(5) In the PC member manufacturing apparatus according to any one of (1) to (4).
The first tension force introducing member and the second tension force introducing member may be tension posts.
The first tension portion and the second tension portion may be arranged so that the moment of force is symmetrical with respect to the reaction force plate.
The first tension portion and the second tension portion may be configured so that tension force can be introduced separately.

(6) In the PC member manufacturing apparatus according to any one of (1) to (4).
The first tension portion and the second tension portion may be formed of a series of connected tension members.
The first tension force introducing member may be a tension post.
The second tension force introducing member may be a member that folds the series of tension members into a U shape.
The tension force may be introduced into the first tension portion and the second tension portion at the same time.

(7) In the PC member manufacturing apparatus according to any one of (1) to (4).
A plurality of the first tension portions arranged on one surface side of the reaction force plate may be sequentially connected to each other to form a series of tension members.
A plurality of the second tension portions arranged on the other surface side of the reaction force plate may be sequentially connected to each other to form a series of tension members.
The PC member manufacturing apparatus may further include a member that folds the series of tension members into a U shape between adjacent first tension force introducing members or between adjacent second tension force introducing members. ,
The series of tensioning materials formed by connecting the first tensioning portions and the series of tensioning members formed by connecting the second tensioning portions may be arranged symmetrically with respect to the reaction force plate.

(8) In the PC member manufacturing apparatus according to (6) or (7).
The member that folds the series of tension members in a U shape may be a cylinder, a semi-cylinder, or a pulley.

(9) In the PC member manufacturing apparatus according to any one of (1) to (8).
The reaction force plate may have a plurality of reaction force members arranged in a plane.

According to the present invention, it is possible to provide a small and movable PC member manufacturing apparatus suitable for small-quantity production applications.

It is a perspective view which shows the structure of the manufacturing apparatus of the PC member which concerns on a comparative example. FIG. 2 is a sectional view taken along line II-II of the PC member manufacturing apparatus shown in FIG. It is a front view of the manufacturing apparatus of the PC member which concerns on 1st Embodiment. It is a side view of the manufacturing apparatus of the PC member which concerns on 1st Embodiment. It is a top view of the manufacturing apparatus of the PC member which concerns on 1st Embodiment. It is a front view of the manufacturing apparatus of the PC member which concerns on the modification of 1st Embodiment. It is a front view of the manufacturing apparatus of the PC member which concerns on other modification of 1st Embodiment. It is a front view of the manufacturing apparatus of the PC member which concerns on 2nd Embodiment. It is a side view of the manufacturing apparatus of the PC member which concerns on 2nd Embodiment. It is a top view of the manufacturing apparatus of the PC member which concerns on 2nd Embodiment. It is a top view of the manufacturing apparatus of the PC member which concerns on 3rd Embodiment. It is a top view of the manufacturing apparatus of the PC member which concerns on the modification of 3rd Embodiment. It is a schematic diagram of the manufacturing apparatus of the PC member which concerns on the modification of 2nd Embodiment.

Hereinafter, an example of the embodiment of the present invention will be described with reference to the accompanying drawings. In addition, the same reference numerals are given to the same or corresponding parts in each drawing.

First, before explaining the present embodiment, a PC member manufacturing apparatus devised by the inventors of the present application in the process leading to the present invention will be described as a comparative example of the present embodiment.

(Comparison example)
FIG. 1 is a perspective view showing a configuration of a PC member manufacturing apparatus according to a comparative example, and FIG. 2 is a sectional view taken along line II-II of the PC member manufacturing apparatus shown in FIG. The XYZ Cartesian coordinate system is shown in FIGS. 1 and 2. The X direction is the width direction (horizontal direction) of the manufacturing device, the Y direction is the length direction (horizontal direction) of the manufacturing device, and the Z direction is the height direction (vertical direction) of the manufacturing device (FIGS. 3 to 3). The same applies to FIG. 12).

The PC (prestressed concrete) member manufacturing apparatus 1 shown in FIGS. 1 and 2 includes a plurality of PC (prestressed concrete) tensioning members 5 and manufactures a PC member into which prestress is introduced by a pretension method. Is. The manufacturing apparatus 1 includes a plurality of post pairs 30 including a pair of a first tension post 10 and a second tension post 20, a reaction force plate 40, a formwork 50, and an upper reaction force beam 60.

Note that the PC member is omitted in FIG. 1, and the PC member 3 (hatched portion) is shown in FIG. Further, in order to avoid complication of the drawing, in FIG. 2, hatching showing a cross section is omitted (first tension post 10, second tension post 20, etc.), and a part of hidden lines is omitted (all screw bolts described later). etc).

The plurality of posts to 30 can introduce tension force to the plurality of tension members 5 for PC independently and independently by using the tension jack 70. The plurality of first tension posts 10 on one side of the plurality of posts vs. 30 are arranged along one side of the reaction force plate 40. The plurality of second tension posts 20 on the other side of the plurality of posts 30 are arranged along the other side facing one side of the reaction force plate 40.

The first tension post 10 and the second tension post 20 have a quadrangular prism shape extending in the Z direction. The first tension post 10 and the second tension post 20 are constructed by casting concrete into a square tubular steel frame. The first tension post 10 and the second tension post 20 may be composed of only a steel frame.

A through hole 11 penetrating in the Y direction is formed in the lower portion of the first tension post 10 (see FIG. 2). All screw bolts B are inserted into the through holes 11. As a result, the first tension post 10 and the reaction force plate 40 are fixed by using the plate P and the nut N.
Further, a protrusion 12 is formed on the upper portion of the first tension post 10. As a result, the upper reaction force beam 60 is mounted on the protrusion 12.
Further, a through hole 13 penetrating in the Y direction is also formed in the intermediate portion of the first tension post 10. A fixing tension material (PC steel rod or the like) 15 is inserted into the through hole 13. At one end of the fixing tension material 15, a coupler 16 for connecting the fixing tension material 15 and the PC tension material 5 is provided. The other end of the fixing tension member 15 is fixed to the first tension post 10 by using the plate P and the nut N.

Similarly, a through hole 21 penetrating in the Y direction is formed in the lower portion of the second tension post 20 (see FIG. 2). All screw bolts B are inserted into the through holes 21. As a result, the second tension post 20 and the reaction force plate 40 are fixed by using the plate P and the nut N.
A protrusion 22 is formed on the upper portion of the second tension post 20. As a result, the upper reaction force beam 60 is mounted on the protrusion 22.
Further, a through hole 23 penetrating in the Y direction is also formed in the middle portion of the second tension post 20. A fixing tension material (PC steel rod or the like) 25 is inserted into the through hole 23. At one end of the fixing tension material 25, a coupler 26 for connecting the fixing tension material 25 and the PC tension material 5 is provided. The other end of the fixing tension member 25 is fixed to the second tension post 20 by using the plate P and the nut N.

The reaction plate 40 is arranged at the bottom between the plurality of posts 30, that is, between the plurality of first tension posts 10 and the plurality of second tension posts 20. The reaction force plate 40 supports the plurality of posts 30 by receiving the reaction force when the tension force is introduced into the tension member 5 for the PC. For example, the reaction force plate 40 is a flat plate made of concrete.

Inserts for connecting posts are embedded in one side and the other side of the reaction force plate 40. Specifically, a plurality of inserts 46 for fitting with all-screw bolts B inserted into the through holes 11 at the lower part of the first tension post 10 are embedded on one side of the reaction force plate 40. Similarly, on the other side of the reaction force plate 40, a plurality of inserts 47 for fitting with all-screw bolts B inserted into the through holes 21 at the lower part of the second tension post 20 are embedded.

The mold 50 is a mold for manufacturing the PC member 3, and is arranged on the reaction force plate 40. In this comparative example, the formwork 50 is arranged so as to extend in the Y direction on the plurality of steel frames 56 and the plurality of steel frames 56 arranged so as to extend in the X direction on the reaction force plate 40. It is arranged on the reaction force plate 40 via the plurality of steel frames 57.

The upper reaction beam 60 is arranged above between the plurality of posts 30, that is, between the plurality of first tension posts 10 and the plurality of second tension posts 20. The upper reaction force beam 60 supports a plurality of post pairs 30 by receiving a reaction force when the tension force is introduced into the tension member 5 for PC. For example, the upper reaction force beam 60 is formed by combining a plurality of steel frames 62 in the X direction (width direction) and the Y direction (length direction) and arranging them in a plane.

The tension jack 70 is a tension jack for introducing tension force into a plurality of tension materials 5 for PC independently and independently.

A high-strength tension material is used for the PC tension material 5 of the PC member 3, the fixing tension material 15 of the first tension post 10, and the fixing tension material 25 of the second tension post 20. The high-strength tension material may be a high-strength reinforcing bar having a tensile strength several times higher than that of a reinforcing bar used in a general RC structure. For example, MK785 (manufactured by Mukaiyama Factory Co., Ltd., yield strength 785N / mm) ^2. Tensile strength 930 N / mm ² ).

As described above, according to the PC member manufacturing apparatus 1 of this comparative example, the reaction force plate 40 is arranged at the bottom between the plurality of post pairs 30, and the upper reaction force beam 60 is formed of the plurality of post pairs 30. Placed at the top of the space. As a result, not only the reaction force plate 40 at the bottom but also the reaction force beam 60 at the top can support the plurality of posts 30 by receiving the reaction force when the tension force is introduced into the tension member 5 for the PC. Therefore, even if the first tension post 10 and the second tension post 20 are made mobile instead of fixed, and the size is reduced, the first tension post 10 and the second tension post 20 do not fall down, which is sufficient for the tension material 5 for PC. Can introduce a lot of tension. The PC member manufacturing apparatus 1 of this comparative example is suitable for (high-mix) low-volume production.

Further, according to the PC member manufacturing apparatus 1 of the comparative example, the tension post can be divided into a plurality of first tension posts 10 and a plurality of second tension posts 20. Thereby, the manufacturing apparatus 1 of the PC member can be easily moved. Therefore, the manufacturing place of the PC member is not limited. For example, it becomes possible to easily manufacture a PC member not only in a specific facility such as a factory but also in a site where the PC member is used.

By the way, in the PC member manufacturing apparatus 1 of the comparative example, the upper reaction force beam 60 may interfere with the work during the work such as concrete placing and surface finishing of the PC member.

Therefore, as a result of further diligent studies, the inventors of the present application did not provide the upper reaction force beam 60 in order to improve workability, and only the reaction force plate 40 was used when the tension force was introduced into the tension material 5 for PC. A small and movable PC member that can support a plurality of post pairs 30 by receiving a reaction force and can introduce a sufficient tension force into the PC tension material 5 without the plurality of post pairs 30 falling over. Invented the manufacturing equipment of. Hereinafter, three embodiments will be described.

(First Embodiment)
FIG. 3 is a front view of the PC member manufacturing apparatus according to the first embodiment, FIG. 4 is a side view of the PC member manufacturing apparatus according to the first embodiment, and FIG. 5 is a side view of the PC member manufacturing apparatus according to the first embodiment. It is a top view of the manufacturing apparatus of the PC member which concerns on.

The PC member manufacturing apparatus 1A of the first embodiment shown in FIGS. 3 to 5 is mainly used in the PC member manufacturing apparatus 1 of the above-mentioned comparative example shown in FIGS. 1 and 2.
-Without the upper reaction force beam 60,
・ Two first tension lumbers 6 and second tension lumbers 7 are extended between each post and 30A.
A reaction force plate 40A is arranged between the first tension member 6 and the second tension member 7.
It differs from the comparative example in that.

Specifically, the PC member manufacturing apparatus 1A of the first embodiment includes a plurality of first tension members (first tension portions) 6, a plurality of second tension members (second tension portions) 7, and a first. A plurality of post pairs (tension force introducing member pair) 30A consisting of a tension post (first tension force introducing member) 10A and a second tension post (second tension force introducing member) 20A, a reaction force plate 40A, and the like. A mold 50 is provided.

The plurality of post pairs 30A, similarly to the plurality of post pairs 30 described above, use the tension jack 70 to introduce tension forces to the plurality of first tension members 6 and the plurality of second tension members 7 independently and independently. be able to. The plurality of first tension posts 10A on one side of the plurality of posts vs. 30A are arranged along one side of the reaction force plate 40A. The plurality of second tension posts 20A on the other side of the plurality of posts vs. 30A are arranged along the other side facing one side of the reaction force plate 40A. That is, the plurality of post pairs 30A are arranged vertically so as to intersect the reaction force plate 40A, and are arranged in the horizontal direction.

The first tension post 10A and the second tension post 20A form a quadrangular prism shape extending in the Z direction (vertical direction). The first tension post 10A and the second tension post 20A are constructed by casting concrete into a square tubular steel frame. The first tension post 10A and the second tension post 20A may be composed of only a steel frame.
The number of the first tension post 10A and the second tension post 20A is not limited to this embodiment, and is appropriately determined according to the number of PC tension members 5 of the PC member 3 to be manufactured (that is, the magnitude of the prestress to be introduced). Can be changed.

A through hole 11A penetrating in the Y direction is formed in the upper part of the first tension post 10A (see FIG. 3). One end of the first tension material 6 is inserted into the through hole 11A. One end of the first tension member 6 is fixed to the first tension post 10A by using the plate P and the nut N.
Further, a through hole 12A penetrating in the Y direction is formed in the lower portion of the first tension post 10A. One end of the second tension member 7 is inserted into the through hole 12A. One end of the second tension member 7 is fixed to the first tension post 10A by using the plate P and the nut N.
Further, a protrusion 13A is formed in the middle portion of the first tension post 10A. As a result, the reaction force plate 40A is mounted on the protrusion 13A.

Similarly, a through hole 21A penetrating in the Y direction is formed in the upper part of the second tension post 20A. The other end of the first tension lumber 6 is inserted into the through hole 21A. The other end of the first tension member 6 is fixed to the second tension post 20A by using the plate P and the nut N.
Further, a through hole 22A penetrating in the Y direction is formed in the lower portion of the second tension post 20A. The other end of the second tensioning member 7 is inserted into the through hole 22A. The other end of the second tension member 7 is fixed to the second tension post 20A by using the plate P and the nut N.
Further, a protrusion 23A is formed in the middle portion of the second tension post 20A. As a result, the reaction force plate 40A is mounted on the protrusion 23A.

The first tension material 6 and the second tension material 7 may be fixed to the first tension post 10A and the second tension post 20A by using the fixing tension material and the coupler, as in the comparative example described above.

The reaction force plate 40A forms a flat plate extending in the X direction and the Y direction (horizontal direction), similarly to the reaction force plate 40 described above. That is, the reaction force plate 40A is arranged horizontally. The reaction plate 40A has a plurality of first tension members 6 and a plurality of second tension members 7 between the plurality of posts vs. 30A, that is, between the plurality of first tension posts 10A and the plurality of second tension posts 20A. It is placed between and. In other words, the first tension material 6 is arranged on one side of the reaction force plate 40A, the second tension material 7 is arranged on the other side of the reaction force plate 40A, and the first tension material 6 and the second tension material 7 are arranged. Is arranged symmetrically with respect to the reaction force plate 40A. The reaction force plate 40A supports a plurality of posts vs. 30A by receiving the reaction force when the tension force is introduced into the first tension member 6 and the second tension member 7.

In the present embodiment, the reaction force plate 40 may be a flat plate made of concrete as in the comparative example, or may be made of a steel frame. When the reaction force plate 40 is mounted on the protrusion 13A of the first tension post 10A and the protrusion 23A of the second tension post 20A, it is preferably made of a relatively lightweight steel frame.

The mold 50 is a mold for manufacturing the PC member 3, and is arranged on the reaction force plate 40. In the present embodiment, the first tension material 6 is applied to the tension material 5 for PC in the PC member 3.
As the first tension material 6 and the second tension material 7, a high-strength tension material is used as in the above-mentioned PC tension material 5 and the like.

In this way, in each post pair 30A, the first tension post 10A and the second tension post 20A are configured to be able to separately introduce tension into the first tension member 6 and the second tension member 7. As a result, the plurality of posts vs. 30A, that is, the plurality of first tension posts 10A and the plurality of second tension posts 20A are independently independent of the plurality of first tension members 6 and the plurality of second tension members 7, and the reaction forces are generated. It is configured so that tension force can be introduced symmetrically with respect to the plate 40A.

As described above, according to the PC member manufacturing apparatus 1A of the present embodiment, between the first tension post 10A and the second tension post 20A, between the first tension material 6 and the second tension material 7. The reaction force plate 40A is arranged on the. As a result, in the first tension post 10A and the second tension post 20A, the reaction force when the tension force is introduced into the first tension member 6 and the reaction force when the tension force is introduced into the second tension member 7 are counter-forced. Balance using the force plate 40A as a fulcrum. Therefore, the reaction force plate 40A alone can support the plurality of posts 30A by receiving the reaction force when the tension force is introduced into the tension member 5 for PC (first tension member 6). As a result, even if the first tension post 10A and the second tension post 20A are made mobile rather than fixed and miniaturized, the first tension post 10A and the second tension post 20A do not fall down and become the tension material 5 for PC. Sufficient tension can be introduced. The PC member manufacturing apparatus 1 of this embodiment is suitable for (high-mix) low-volume production.

From the viewpoint of the balance between the reaction force when the tension force is introduced into the first tension member 6 and the reaction force when the tension force is introduced into the second tension member 7 with the reaction force plate 40A as a fulcrum, the first tension It is preferable that the tension force introduced into the material 6 and the tension force introduced into the second tension material 7 have substantially the same magnitude. Further, the distance D1 between the center of the reaction force plate 40A in the Z direction (vertical direction) and the center of the first tension member 6 and the distance D2 between the center of the reaction force plate 40A in the Z direction and the center of the second tension member 7 It is preferable that they are substantially the same.
Further, when the tension force F1 introduced into the first tension member 6 and the tension force F2 introduced into the second tension member 7 are different, and when the interval D1 and the interval D2 are different, the reaction force is obtained. It is preferable that the moments F1 × D1 and F2 × D2 of the force with respect to the center of the plate 40A in the Z direction (vertical direction) are substantially the same.

Further, also in the PC member manufacturing apparatus 1A of the present embodiment, the tension post can be divided into a plurality of first tension posts 10A and a plurality of second tension posts 20A, similarly to the PC member manufacturing apparatus 1 of the comparative example. As a result, the PC member manufacturing apparatus 1A can be easily moved. Therefore, the manufacturing place of the PC member is not limited. For example, it becomes possible to easily manufacture a PC member not only in a specific facility such as a factory but also in a site where the PC member is used.

(Modified example of the first embodiment)
As shown in FIGS. 6A and 6B, a support member 61 that supports a plurality of posts 30A by receiving a reaction force when a tension force is introduced into the second tension member 7 may be provided. As shown in FIG. 6A, an example of the support member 61 is a metal pipe surrounding the second tension member 7.
Further, as shown in FIG. 6B, another example of the support member 61 is a concrete slab provided with the second tension member 7 penetrating inside and adjacent to the reaction force plate 40A. When the reaction force plate 40A is made of concrete, the reaction force plate 40A and the support member 61 may be integrally formed.

As a result, it is possible to prevent the first tension post 10A and the second tension post 20A from collapsing when the tension force is first introduced into the second tension member 7, and the workability at the time of introducing the tension force is improved. be able to.
Further, from the viewpoint of the balance between the reaction force when the tension force is introduced into the first tension member 6 and the reaction force when the tension force is introduced into the second tension member 7 with the reaction force plate 40A as a fulcrum, the first tension is obtained. It is not necessary to set the magnitude (or force moment) of the tension force introduced into the material 6 and the magnitude (or force moment) of the tension force introduced into the second tension material 7 to be substantially the same, and the tension Workability at the time of force introduction can be improved.

(Second Embodiment)
In the first embodiment, a so-called horizontal manufacturing apparatus 1A for manufacturing a flat plate-shaped PC member 3 parallel to the X direction and the Y direction (horizontal direction) has been exemplified. In the second embodiment, a so-called vertical manufacturing apparatus for manufacturing a flat plate-shaped PC member 3 parallel to the Z direction (vertical direction) is illustrated.

FIG. 7 is a front view of the PC member manufacturing apparatus according to the second embodiment, FIG. 8 is a side view of the PC member manufacturing apparatus according to the second embodiment, and FIG. 9 is a side view of the PC member manufacturing apparatus according to the second embodiment. It is a top view of the manufacturing apparatus of the PC member which concerns on.

The PC member manufacturing apparatus 1B of the second embodiment shown in FIGS. 7 to 9 is mainly used in the PC member manufacturing apparatus 1A of the first embodiment shown in FIGS. 3 to 5.
・ Equipped with a pulley (folding part) 20B instead of the second tension post 20A.
-The first tension material 6 and the second tension material 7 are connected and folded back in a U shape.
・ Equipped with two formwork 50,
It differs from the first embodiment in that it is different from the first embodiment.

Specifically, the PC member manufacturing apparatus 1B of the second embodiment is a series of tension materials in which the first tension material (first tension portion) 6 and the second tension material (second tension portion) 7 are connected. A plurality of tension force introducing members pair 30B composed of a pair of a first tension post (first tension force introducing member) 10A and a pulley (second tension force introducing member, folding portion) 20B, a reaction force plate 40A, and It includes two molds 50.

The plurality of tension force introducing members vs. 30B can introduce tension force independently and independently to a plurality of series of tension members by using the tension jack 70. The plurality of first tension posts 10A on one side of the plurality of tension force introducing members 30B are stacked in the Z direction (vertical direction) along one side of the reaction force plate 40A. The plurality of pulleys 20B on the other side of the plurality of tension force introducing members 30B are stacked in the Z direction (vertical direction) along the other side facing one side of the reaction force plate 40A. That is, the plurality of tension force introducing members pair 30B are arranged horizontally so as to intersect the reaction force plate 40A and are stacked in the vertical direction. The first tension post 10A and the pulley 20B may be stacked via spacers. Thereby, the interval between the PC tensioning members 5 in the PC member 3 can be adjusted.

The pulley 20B is composed of a rotating portion 27 and a supporting portion 28 that supports the rotating portion 27. The pulley 20B folds back a series of tension members in which the first tension member 6 and the second tension member 7 are connected in a U shape. Thereby, each of the plurality of tension force introducing members vs. 30B can simultaneously introduce the same tension force into each series of tension members, that is, the first tension member 6 and the second tension member 7.

The reaction force plate 40A forms a flat plate extending in the Z direction (vertical direction). That is, the reaction force plate 40A is arranged vertically. The reaction force plate 40A has a plurality of first tension members 6 and a plurality of second tension members 7 between the plurality of tension force introducing members vs. 30B, that is, between the plurality of first tension posts 10A and the plurality of pulleys 20B. It is placed between and. In other words, the first tension material 6 is arranged on one side of the reaction force plate 40A, the second tension material 7 is arranged on the other side of the reaction force plate 40A, and the first tension material 6 and the second tension material 7 are arranged. A series of tensioning materials connected to and are folded back in a U shape and arranged. The reaction force plate 40A supports a plurality of tension force introducing members 30B by receiving the reaction force at the time of introducing the tension force into the first tension member 6 and the second tension member 7.

The mold 50 is a mold for manufacturing the PC member 3, and is arranged on both main surface sides of the reaction force plate 40. In the present embodiment, the first tension material 6 is applied to the PC tension material 5 in the PC member 3, and the second tension material 7 is applied to the PC tension material 5 in the other PC member 3.

In this way, in each tension force introducing member pair 30B, the first tension post 10A and the pulley 20B are configured so that the tension force can be introduced into the first tension member 6 and the second tension member 7 at the same time. As a result, the plurality of tension force introducing members vs. 30B, that is, the plurality of first tension posts 10A and the plurality of pulleys 20B are independently independent of a plurality of series of tension members including the first tension member 6 and the second tension member 7. Therefore, the same tension force can be introduced into each series of tension materials at the same time.

Further, the tension force introduced into the first tension member 6 and the tension force introduced into the second tension member 7 have the same magnitude. Further, the distance D1 between the center of the reaction force plate 40A in the Z direction (vertical direction) and the center of the first tension member 6 and the distance D2 between the center of the reaction force plate 40A in the Z direction and the center of the second tension member 7 Is the same.

As described above, also in the PC member manufacturing apparatus 1B of the present embodiment, the reaction force plate 40A between the first tension member 6 and the second tension member 7 between the first tension post 10A and the pulley 20B. Is placed. As a result, in the first tension post 10A and the pulley 20B, the reaction force when the tension force is introduced into the first tension member 6 and the reaction force when the tension force is introduced into the second tension member 7 are combined with the reaction force plate 40A. Balance with. Therefore, the reaction force plate 40A alone receives the reaction force at the time of introducing the tension force to the tension member 5 for PC (the first tension member 6 and the second tension member 7) to support the plurality of tension force introduction members vs. 30B. Can be done. As a result, even if the first tension post 10A and the pulley 20B are made mobile instead of fixed, and the first tension post 10A and the pulley 20B do not fall down, sufficient tension is introduced into the tension material 5 for PC. can do.

Further, also in the PC member manufacturing apparatus 1B of the present embodiment, the tension force introducing member can be divided into a plurality of first tension posts 10A and a plurality of pulleys 20B, similarly to the PC member manufacturing apparatus 1A of the first embodiment. As a result, the PC member manufacturing apparatus 1B can be easily moved.

Further, the PC member manufacturing apparatus 1B of the present embodiment is a so-called vertical type. As a result, the upper side of the reaction force plate 40A opens on both sides, which facilitates work such as placing concrete. Therefore, the two PC members 3 can be easily manufactured by using the first tension member 6 and the second tension member 7 on both sides of the reaction force plate 40A.

(Modified example of the second embodiment)
In the second embodiment, the reaction force plate 40A may have a plurality of reaction force members arranged in a plane. In this case, for example, a post-tension method may be used to interconnect concrete reaction force members to form the reaction force plate 40. Further, in this case, the first tension post 10A, the pulley 20B, and the reaction force plate 40A may be fixed by using an insert, a full screw bolt, a plate, a nut, or the like as in the comparative example.

According to this, the reaction force plate 40 is formed by combining a plurality of reaction force members, and the tension force introducing member is formed by combining a plurality of first tension posts 10A and a plurality of pulleys 20B (reaction force plate 40). By changing the number of combinations of the tension force introducing member), the number of combinations of the reaction force members, and the number of combinations of the first tension post 10A and the pulley 20B, PC members having different sizes can be easily manufactured. Therefore, the PC member manufacturing apparatus 1B is suitable for high-mix low-volume production.
Further, when producing a small PC member, the number of reaction force members, the number of first tension posts 10A and the number of pulleys 20B can be reduced, which is economical.
Further, the size of the manufacturing apparatus can be changed according to the size of the PC member, and the amount of waste of the PC tensioning material 5 can be reduced.

Further, according to the PC member manufacturing apparatus 1B, the reaction force plate 40 can be divided into a plurality of reaction force members, and the tension force introducing member can be divided into a plurality of first tension posts 10A and a pulley 20B. Further, since the tension force introducing member is configured to be able to introduce the tension force into the plurality of tension members 5 for PC independently and independently, the tension jack 70 can be miniaturized.
As a result, the PC member manufacturing apparatus 1B can be easily moved. Therefore, the manufacturing place of the PC member is not limited. For example, it becomes possible to easily manufacture a PC member not only in a specific facility such as a factory but also in a site where the PC member is used.

(Third Embodiment)
FIG. 10 is a plan view of the PC member manufacturing apparatus according to the third embodiment.

The PC member manufacturing apparatus 1C of the third embodiment shown in FIG. 10 is the PC member manufacturing apparatus 1A of the first embodiment shown in FIGS. 3 to 5.
-Equipped with one first tension material 6 and one second tension material 7 (not shown).
A plurality of folding portions 63 for folding back the first tension material 6 and the second tension material 7 are further provided.
It differs from the first embodiment in that it is different from the first embodiment.

Specifically, the PC member manufacturing apparatus 1C of the third embodiment replaces the plurality of first tensioning members 6 and the plurality of second tensioning members 7 in the PC member manufacturing apparatus 1A of the first embodiment. A series of first tension members 6 in which a plurality of first tension members 6 are sequentially connected to each other, and a series of second tension members 7 in which a plurality of second tension members 7 are sequentially connected to each other are provided. The series of first tension members 6 are arranged on one surface side of the reaction force plate 40A, and the series of second tension members 7 are arranged on the other surface side of the reaction force plate 40A. Further, the PC member manufacturing apparatus 1C of the third embodiment further includes a plurality of folding portions 63 in the PC member manufacturing apparatus 1A of the first embodiment.

The folded-back portion 63 is arranged between the adjacent first tension posts 10A or between the adjacent second tension posts 20A. The folded-back portion 63 forms a semi-cylindrical shape extending in the Z direction (vertical direction). The folded-back portion 63 folds a series of first tension members 6 and a series of second tension members 7 symmetrically with respect to the reaction force plate 40A in a U-shape. As a result, the plurality of folding portions 63 fold the first tension member 6 and the second tension member 7 symmetrically with respect to the reaction force plate 40A in a zigzag manner. As a result, the series of first tension members 6 and the series of second tension members 7 are arranged symmetrically with respect to the reaction force plate 40A.

In this way, the plurality of posts vs. 30A, that is, the plurality of first tension posts 10A and the plurality of second tension posts 20A, are separated from the first tension material 6 and the second tension material 7 by a series of first tension materials. It is configured so that tension force can be introduced into 6 at the same time and into a series of second tension members 7 at the same time.

As described above, also in the PC member manufacturing apparatus 1C of the present embodiment, between the first tension post 10A and the second tension post 20A, the reaction between the first tension material 6 and the second tension material 7 The force plate 40A is arranged. As a result, in the first tension post 10A and the second tension post 20A, the reaction force when the tension force is introduced into the first tension member 6 and the reaction force when the tension force is introduced into the second tension member 7 are counter-forced. Balance using the force plate 40A as a fulcrum. Therefore, the reaction force plate 40A alone can support the plurality of posts 30A by receiving the reaction force when the tension force is introduced into the tension member 5 for PC (first tension member 6). As a result, even if the first tension post 10A and the second tension post 20A are made mobile rather than fixed and miniaturized, the first tension post 10A and the second tension post 20A do not fall down and become the tension material 5 for PC. Sufficient tension can be introduced.

Further, also in the PC member manufacturing apparatus 1C of the present embodiment, the tension post can be divided into a plurality of first tension posts 10A and a plurality of second tension posts 20A. As a result, the PC member manufacturing apparatus 1C can be easily moved.

Further, according to the PC member manufacturing apparatus 1C of the present embodiment, the first tension member 6 and the second tension member 7 are each one, and the folded-back portion 63 provides the first tension member 6 and the second tension member 7. Wrap back. Therefore, the tension force introduction work to the first tension member 6 and the second tension member 7 is performed once each, and the work time for introducing the tension force can be shortened.
(Modified example of the third embodiment)
As shown in FIG. 11, the folded-back portion 63 may have a columnar shape extending in the Z direction (vertical direction). In this case, the folded-back portion 63 may be supported by the support member 64.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be appropriately modified and combined.

For example, the configuration of the horizontal manufacturing apparatus of the first embodiment or its modification, or the third embodiment or its modification is applied to the configuration of the vertical manufacturing apparatus of the second embodiment or its modification. May be good. Further, the configuration of the vertical manufacturing apparatus of the second embodiment or its modified example is applied to the configuration of the horizontal manufacturing apparatus of the first embodiment or its modified example, or the third embodiment or its modified example. May be good.

Further, in the above-described embodiment, the first tension post, the second tension post and the pulley may have a slide function. Hereinafter, a specific example will be described with reference to FIG.
FIG. 12 is a schematic view when the first tension post 10A and the reaction force plate 40A in the PC member manufacturing apparatus of the second embodiment have a slide function. As shown in FIG. 12, a groove (guide) 48 is formed on the side surface of the reaction force plate 40A, and a protrusion (guide) 18 is formed on the first tension post 10A. By fitting the groove 48 on the side surface of the reaction force plate 40A and the protrusion (guide) 18 of the first tension post 10A, the first tension post 10A can be slid with respect to the reaction force plate 40A. This makes it easy to change the arrangement pitch of the tensioning material in the PC member.
Further, by forming the through holes 11A and 12A in the first tension post 10A in a slit shape, the nut N and the plate P, that is, the first tension material 6 and the second tension material 7 are formed with respect to the first tension post 10A. It can be slid. As a result, it becomes easy to change and adjust the distance between the first tension member 6 and the second tension member 7 and the reaction force plate 40.

Further, in the above-described embodiment, an apparatus for manufacturing a PC member in which a tension material for a PC is arranged in one direction and prestress is introduced in one direction is exemplified. However, the feature of the present invention is not limited to this, and it can be applied to a PC member manufacturing apparatus in which a tension material for PC is arranged in two intersecting directions and prestress is introduced in two directions.

1,1A, 1B, 1C PC member manufacturing equipment 3 PC member 5 PC tension material 6 1st tension material (1st tension part)
7 Second tension material (second tension part)
10,10A 1st tension post (1st tension force introducing member)
11,13,21,23 Through holes 12,22 Protrusions 11A, 12A, 21A, 22A Through holes 13A, 23A Protrusions 15,25 Fixing tension material 16,26 Coupler 18 Protrusions (guide)
20,20A 2nd tension post (2nd tension force introduction member)
20B pulley (second tension introduction member, folding part)
27 Rotating part 28 Support part 30, 30A, 30C Post pair (tension force introduction member pair)
30B tension force introduction member vs. 40, 40A reaction force plate 48 groove (guide)
50 Formwork 56, 57 Steel frame 60 Upper reaction force beam 61 Support member 63 Folded part 64 Support member 70 Tension jack

Claims (9)

It is a device that manufactures PC members that are equipped with tension materials for PCs and have prestress introduced by the pretension method.
A plurality of tension force introducing member pairs consisting of a pair of a first tension force introducing member and a second tensioning force introducing member for introducing a tension force into the tension material for a PC.
A reaction force plate arranged between the plurality of tension force introducing member pairs and supporting the plurality of tension force introducing member pairs by receiving the reaction force at the time of introducing the tension force,
A first tension portion arranged on one side of the reaction force plate and into which a tension force is introduced between the plurality of tension force introducing member pairs,
A second tension portion arranged on the other surface side of the reaction force plate and into which a tension force is introduced between the plurality of tension force introducing member pairs,
With
In the plurality of tension force introducing member pairs, the first tension force introducing member is arranged along one side of the reaction force plate, and the second tension force introducing member is arranged along the other side facing the one side. It is composed by arranging multiple
One of the first tension portion and the second tension portion is applied to the tension material for PC .
The first tension portion and the second tension portion are formed of a series of connected tension members.
The first tension force introducing member is a tension post, and is
The second tension force introducing member is a member that folds the series of tension members into a U shape.
It is configured so that tension force can be introduced into the first tension portion and the second tension portion at the same time.
PC member manufacturing equipment. The reaction force plate is arranged horizontally and
The plurality of tension force introducing member pairs are arranged vertically so as to intersect the reaction force plate and are arranged in the horizontal direction.
The PC member manufacturing apparatus according to claim 1. The reaction force plate is arranged vertically,
The plurality of tension force introducing member pairs are arranged horizontally so as to intersect the reaction force plate and are stacked in the vertical direction.
The PC member manufacturing apparatus according to claim 1. It is configured to be equipped with tensioning materials for other PCs and to be able to manufacture other PC members to which prestress has been introduced by the pretension method.
The other of the first tension portion and the second tension portion is applied to the other tension material for PC.
The PC member manufacturing apparatus according to claim 3. It is a device that manufactures PC members that are equipped with tension materials for PCs and have prestress introduced by the pretension method.
A plurality of tension force introducing member pairs consisting of a pair of a first tension force introducing member and a second tensioning force introducing member for introducing a tension force into the tension material for a PC.
A reaction force plate arranged between the plurality of tension force introducing member pairs and supporting the plurality of tension force introducing member pairs by receiving the reaction force at the time of introducing the tension force,
A first tension portion arranged on one side of the reaction force plate and into which a tension force is introduced between the plurality of tension force introducing member pairs,
A second tension portion arranged on the other surface side of the reaction force plate and into which a tension force is introduced between the plurality of tension force introducing member pairs,
With
In the plurality of tension force introducing member pairs, the first tension force introducing member is arranged along one side of the reaction force plate, and the second tension force introducing member is arranged along the other side facing the one side. It is composed by arranging multiple
One of the first tension portion and the second tension portion is applied to the tension material for PC .
The reaction force plate is arranged vertically,
The plurality of tension force introducing member pairs are arranged horizontally so as to intersect the reaction force plate, and are stacked in the vertical direction.
It is configured to be equipped with tensioning materials for other PCs and to be able to manufacture other PC members to which prestress has been introduced by the pretension method.
The other of the first tension portion and the second tension portion is applied to the other tension material for PC.
PC member manufacturing equipment. The first tension force introducing member and the second tension force introducing member are tension posts.
The first tension portion and the second tension portion are arranged so that the moment of force is symmetrical with respect to the reaction force plate.
It is configured so that tension force can be introduced separately into the first tension portion and the second tension portion.
The PC member manufacturing apparatus according to claim 5. A plurality of the first tension portions arranged on one surface side of the reaction force plate are sequentially connected to each other to form a series of tension members.
A plurality of the second tension portions arranged on the other surface side of the reaction force plate are sequentially connected to each other to form a series of tension members.
Further provided is a member for folding back the series of tension members in a U shape between the adjacent first tension force introducing members or between the adjacent second tension force introducing members.
A series of tensioning materials formed by connecting the first tensioning portions and a series of tensioning materials formed by connecting the second tensioning portions are arranged symmetrically with respect to the reaction force plate.
The PC member manufacturing apparatus according to claim 5. The PC member manufacturing apparatus according to claim 1 or 7, wherein the member for folding back the series of tension members in a U shape is a cylinder, a semi-cylinder, or a pulley. The PC member manufacturing apparatus according to any one of claims 1 to 8, wherein the reaction force plate is formed by arranging a plurality of reaction force members in a plane.

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