JPH06129101A - Molding form for pc product - Google Patents

Abstract

PURPOSE:To provide a molding form for PC products which can form protrusions on the inside face of PC products when detaching the molding form along the inside face. CONSTITUTION:A plurality of groove lines 30 are formed in the full length of the longitudinal direction of the inner form 14, at the molding face 14a of the inner form 14 in the molding form 10 of PC products. A thin groove 30a where the front end of an anchor rod 34 is inserted and a wide groove 30b made shallow on both sides of the opening of the thin groove 30a are provided. The anchor rod 34 is projected inward and fixed to a steel rod cage 32 arranged between inner and outer forms 14, 16. A seal member 36 is closely filled to be detachable at the front end of the anchor rod 34 and the front end of the anchor rod 34 is inserted into the thin groove 30a and then the seal member 36 is fitted in the wide groove 30b to cover the thin groove 30a water-tightly. The seal member 36 is continuously arranged in the longitudinal direction of the wide groove 30b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold used for molding a PC product, and in particular, it is filled with concrete in a space between inner and outer molds arranged substantially concentrically to vibrate and compress. Thus, the present invention relates to a mold for molding a PC product in which a PC product can be immediately demolded and the PC product is demolded along the molding surface of the mold.

[0002]

2. Description of the Related Art Conventionally, a PC (precast concrete) product, for example, a hollow product such as a concrete pipe or a PC column formwork for construction has a shape along the inside and outside of the PC product. Using inner and outer molds, after arranging these inner and outer molds substantially concentrically, the space between both molds is filled with concrete, and after that, the mold is removed when the concrete solidifies or hardens. It is supposed to do.

In recent years, in order to improve the manufacturing efficiency of the PC products, Japanese Patent Publication No. 1-15361 (B28B 1).
As disclosed in No. 08), it is proposed to fill the molding formwork with zero-slump concrete, place it on a vibrating table, and press the concrete to accelerate the solidification of the concrete and enable immediate demolding. Has been done.

By the way, the hollow P is formed by the immediate demolding.
When manufacturing C products, the inner and outer molds are made of steel to increase the number of diversions, and these inner and outer molds are pulled out in the axial direction of the PC product to remove the mold. There is.

[0005]

However, in such a conventional mold for molding a PC product, when the PC product is demolded, the inner and outer molds are pulled out in the axial direction of the PC product as described above. Therefore, it was not possible to form protrusions on the inner or outer surface of the molded PC product. For example, when a PC pillar formwork is molded as a PC product, it is not possible to project protrusions such as anchor streaks inside the PC pillar formwork.
There is a problem that the binding property with the post-cast concrete that is placed in the pillar formwork is deteriorated, and further, the strength of the concrete pillar cannot be further increased.

Therefore, in view of the conventional problems, the present invention can form a protrusion on the inner surface of a PC product even when the mold is removed from the inner surface of the PC product. The object is to provide a mold for molding a product.

[0007]

According to the present invention, in order to achieve the above object, after the inner and outer molds are arranged substantially concentrically, concrete is filled in the space between the molds and PC.
In the mold for molding the product, on the molding surface of the inner mold,
A groove for inserting a protrusion to be projected from the filled concrete surface is continuously formed along the demolding direction of the mold, and a seal body is detachably attached to the protrusion,
When the projection is inserted into the groove and set, the inside of the groove is sealed by the seal body.

Further, the groove is provided with a narrow groove having a width and a depth capable of inserting the protrusion, and wide grooves shallowly formed on both sides of the opening of the narrow groove, and the wide groove is provided by the sealing member. Is continuously covered.

Further, the present invention is characterized in that the tip end portion of the projection is covered, the seal body is mounted, and the seal body is fitted in the groove.

Furthermore, the seal body is divided into a plurality of parts,
It is characterized in that a tip piece of the protrusion is fitted to each of the divided seal bodies to form a protrusion piece, and the seal bodies of the protrusion pieces are sequentially fitted to the groove and set.

[0011]

In the PC product molding frame of the present invention having the above-described structure, when molding the PC product by filling concrete, the tips of the projections are placed in the grooves formed on the molding surface of the inner mold frame. At the same time as inserting, this groove is sealed by a seal body. By filling the concrete in this state, the filled concrete is prevented from entering the groove and the groove is prevented from being blocked by the concrete.
Then, when the PC product is released from the mold along the molding surface of the molding frame due to the solidification of the filled concrete, the projection moves in the groove together with the seal body, and the projection is molded together with the PC product. It can be removed from the formwork. And
By removing the sealing body from the protrusion after demolding, the protrusion can be projected from the inner surface of the PC product. Therefore, even when the PC product is removed from the molding surface along the molding surface of the molding frame, the projection can be projected from the inner surface of the PC product for molding.

Further, the groove is provided with a narrow groove formed with a width and a depth capable of inserting a protrusion, and a wide groove formed shallow on both sides of the opening of the narrow groove, and the wide groove is continuously formed by a seal body. Since the wide groove is sealed by the sealing body by covering it with the cover, the narrow groove in which the protrusion is inserted,
It is possible to prevent the filled concrete from entering, and to project the protrusions from the inner surface of the PC product in the same manner as described above to mold the product.

Further, a sealing body is attached to the tip of the projection so as to cover it, and the sealing body is fitted in the groove to prevent concrete from entering the groove. Similarly, it becomes possible to mold by projecting a protrusion from the inner surface of the PC product.

Furthermore, the seal body is divided into a plurality of pieces, and the tip portions of the protrusions are fitted to the divided seal bodies to form protrusion pieces, and the seal bodies of the protrusion pieces are sequentially fitted into the grooves. By setting them together, the protrusion can be easily attached.

[0015]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. 1 to 6 show a first embodiment of a PC product molding mold 10 of the present invention, FIG. 1 is a perspective view of an inner mold form, FIG. 2 is a perspective view showing a bar arrangement state of a PC product, and FIG. Is an enlarged cross-sectional view of a main part showing a state in which the seal body is set, FIG. 4 is a perspective view showing an upper end of the PC product in a demolded state, FIG. 5 is an enlarged perspective view showing a state in which the seal body is attached, and FIG. PC
It is explanatory drawing which shows one Example of the shaping | molding process by the mold for product shaping | molding.

That is, the PC product molding formwork (hereinafter referred to as the molding formwork) 10 of this embodiment is one in which a PC formwork 12 for a pillar of a building material (see FIG. 4) is formed as a PC product. As shown by way of example, as shown in FIG. 6, an inner mold form 14 and an outer mold form 16 are provided, and these inner and outer mold forms 14, 16 are coaxially fitted and arranged, and are formed between them. The space 18 is filled with zero slump concrete from the hopper 20. Vibration is applied to the outer form 16 by a vibrator 22, and the filled concrete is compacted by this additional vibration. Further, the concrete is compacted by the vibration exciter 22 as described above, and the pressurizer 24 is moved downward to apply a pressing force to the concrete, so that the concrete is pressed compactly and the solidification of the concrete is promoted. It has become.
Then, when the concrete is solidified, the inner and outer formwork 1
It is demolded by pulling out 4, 16 upwards.

The inner frame 14 has a rectangular cross section as shown in FIG. 1, and its main body is made of steel, hard rubber or F.
It is formed into a rigid body by using RP (fiber reinforced resin) or the like. The molding surface 14a of the inner mold 14 has a pillar P shown in FIG.
Corresponding to the attachment position of an anchor streak 34, which will be described later, protruding inside the C-frame 12, the length of the inner mold 14 (vertical direction in the figure), that is, the total length of the inner mold 14 in the demolding direction. A plurality of grooves 30, 30 ... Are formed over the entire length. The groove 30 is
A narrow groove 30a formed with a width w1 and a depth d1 into which the tip portion of the anchor line 34 is inserted, and the narrow groove 30a.
A wide groove 30b formed shallowly is provided on both sides of the opening.

By the way, the pillar PC mold 12 is molded as a hollow body having a rectangular cross section as shown in FIG. 4, and the pillar PC mold 12 has a vertical shape as shown in FIG. A reinforcing bar cage 32 in which the muscles 32a and the hoop muscles 32b are bound is buried. The rebar cage 32 is the space 1 between the inner and outer molds 14 and 16.
It is stored in 8 before the concrete is filled.

The hoop reinforcement 32b of the rebar cage 32 has a large number of anchor reinforcements 3 as protrusions bent in a substantially U shape.
4, 34 ... Are fixed by welding or the like. The tip ends of these anchor bars 34, 34 ... Are projected toward the inside of the reinforcing bar cage 32, and when the column PC form 12 is completed, as shown in FIG. It

A seal body 36 for sealing the opening of the groove 30 is attached to the tip ends of the anchor muscles 34, 34 ... As shown in FIG. 5, the seal body 36 is formed with a width W substantially equal to that of the wide groove 30b, and is divided into a plurality of pieces in the length direction of the groove 30 to be formed thin. A small hole 36a is formed in the sealing body 36, and the small hole 36a penetrates through the tip end portions of the anchor muscles 34, 34 ... Then, with the rebar cage 32 set in the space 18 between the inner and outer molds 14 and 16, as shown in FIG.
The tip portion of ... is inserted into the narrow groove 30a of the groove 30, and the sealing body 36 is fitted into the wide groove 30b so as to liquid-tightly cover the narrow groove 30a. The sealing body 36 is continuously arranged in the longitudinal direction of the wide groove 30b.

With the above construction, the molding frame 1 of this embodiment
In 0, when the rebar cage 32 is set in the space 18 between the inner and outer molds 14 and 16, the molding surface 14a of the inner mold 14 is set.
The distal end portions of the anchor bars 34, 34, ... Which project inside the reinforcing bar cage 32 are inserted into the groove 30 formed in the above. At this time, the sealing body 36 closely fitted to the tip end portions of the anchor ribs 34, 34 ... Is fitted into the wide groove 30b of the groove 30 so that the anchor groove 34, 34 ... 30a is sealed.

Then, by filling the space portion 18 with concrete in a state where the rebar cage 32 is arranged,
A reinforcing rod cage 32 is embedded in this concrete. Also,
In the present embodiment, zero slump concrete is used, and rapid solidification of the filled concrete is achieved by the vibration and pressure applied by the shaker 22 and the pressurizer 24. In this manner, the concrete is solidified, and the inner and outer molds 14 and 16 are pulled up and removed from the mold. During this demolding, the anchor muscles 34, 34 ...
The seal body 36 moves relative to the groove 30, and the inner / outer molds 14 and 16 can be demolded while remaining on the concrete side filled with the anchor bars 34, 34 ... And the seal body 36.

Then, in this way, the inner and outer formwork 14, 16
At the stage of removing the mold, as shown in FIG. 3, the anchor muscles 34, 34 ... Are projected on the inner surface of the column PC mold 12 with the seal body 36 attached. Therefore, the seal body 3 detachably fitted to the anchor bars 34, 34 ...
By removing 6, it is possible to project only the anchor ribs 34, 34 ... On the inner surface of the column PC form 12. In this way, the anchor ribs 34, 34, ... Are projected on the inner surface of the column PC form 12 to improve the bondability with the post-cast concrete filled inside the column PC form 12 on site. Significantly improved, and by extension, P for this pillar
The strength of the reinforced concrete constructed using the C form 12 can be significantly increased.

7 to 10 show a second embodiment, and the same components as those of the first embodiment will be designated by the same reference numerals and overlapping description will be omitted. 7 is a perspective view of the inner formwork, FIG. 8 is a perspective view showing a bar arrangement state of the PC product, FIG. 9 is a perspective view showing an upper end portion of the PC product in a demolded state, and FIG. 10 is a sealing body attached state. It is an enlarged perspective view showing.

In this embodiment, the entire end portions of the anchor muscles 34, 34 ... Are fitted so as to be covered with the seal body 40, and the seal body 40 is fitted so as to be in close contact with the entire inner surface of the groove 42. . That is, as shown in FIG. 7, the groove 42 is formed so that its width w2 is larger than the diameter of the tip portion of the anchor streak 34 and its depth d2 is larger than the length of the tip portion of this anchor streak 34. Then, the sealing body 40 is continuously formed in the longitudinal direction as a rectangular cross section along the inner shape of the groove 42, and the sealing body 4 is formed.
As shown in FIG. 10, the holes 0, 44, 44, 44, 44, which do not penetrate the anchor muscles 34, are formed so as to closely fit the anchor muscles 34.

Therefore, in this embodiment, the holes 44, 4
By fitting the tip of the anchor muscle 34 to 4 ...
As shown in FIG. 8, the seal body 40 is attached in the vertical direction,
When the rebar cage 32 is set in the space 18 between the inner and outer molds 14 and 16 shown in FIG.
Fits closely into the groove 42 of the. And the space portion 1
8 is filled with concrete and is removed from the mold when it is solidified. At the time of this mold release, the seal body 40 slides in the groove 42, and the inner and outer mold frames 14 and 16 are removed. In this demolded state, as shown in FIG. 9, the seal body 40 is attached to the inner side surface of the column PC mold 12. Therefore, by removing the seal body 40, the anchor muscle 3
It is possible to project the tip end portions of the columns 4, 34 ... From the inner side surface of the column PC form 12, and to exhibit the same function as in the first embodiment.

FIG. 11 and FIG. 12 show a third embodiment, and the same components as those in each of the above-mentioned embodiments are designated by the same reference numerals and the duplicate description will be omitted. 11. FIG. 11 is a perspective view of the main part of this embodiment, and FIG. 12 is a cross-sectional view of the main part showing the attachment state of the anchor bar.

That is, in this embodiment, the seal body 50 divided into a plurality of pieces in the lengthwise direction is provided with independent anchor bars 5.
The tip ends of the two are fitted to form the projection piece 54. The seal body 50 is formed with a hole 56 that does not pass through for closely fitting the anchor muscle 52, and the anchor muscle 52 is detachably fitted into the hole 56, so that the seal body 50 and the anchor muscle 52 And are supplied in an integrated state.

When the space 18 between the inner and outer molds 14 and 16 is filled with concrete, first, a plurality of projection pieces 54 are attached to the tip ends of the plurality of anchor bars 52 bound to the reinforcing bar cage 32. The seal bodies 50 of 1 are sequentially fitted, and the space 1
When the rebar cages 32 are inserted and set in the inside 8, they are mounted in the grooves 42 of the inner formwork 14. In this case, the base end of the anchor bar 52 is projected from each seal body 50, and the base end is embedded in the concrete by filling the space 18 with concrete. It is desirable that the base end portion of the anchor bar 52 be fixed to the reinforcing bar cage 32 via a binding wire 58 or the like as shown in FIG.

Therefore, even in this embodiment, the grooves 42 are sealed by the respective seal bodies 50 to prevent concrete from entering,
Moreover, by removing each seal body 50 after demolding,
The tip portion of the anchor muscle 52 can be projected from the inner surface of the column PC form 12. Further, in this embodiment, the protrusion piece 54 is formed by the seal body 50 and the anchor bar 52 which are integrally assembled, and the anchor bar 52 is set by fitting the protrusion piece 54 into the groove 42. Therefore, the work of attaching the anchor muscles 52 can be easily performed.

[0031]

As described above, according to the first aspect of the present invention.
In the PC product molding form shown in Fig. 3, the protrusion is inserted into the groove formed on the molding surface of the inner form, and the groove is sealed with the seal body, so that the filled concrete enters the groove. It is possible to prevent the groove from being blocked. Then, when the PC product is released from the mold as the filled concrete solidifies, the projection moves together with the seal member in the groove, so that the PC product and the projection can be extracted from the molding frame. . Then, by removing the seal body from the projection after the mold is removed, the projection can be projected from the inner surface of the PC product. Therefore, even when the PC product is demolded along the molding surface of the molding frame, P
It is possible to project the protrusions from the inner surface of the C product and mold the product, so that the degree of freedom in shape of the PC product can be significantly improved.

Further, according to a second aspect of the present invention, a narrow groove is formed in the groove with a width and a depth capable of inserting a protrusion, and a wide groove shallowly formed on both sides of the opening of the narrow groove. By providing a seal and continuously covering the wide groove with a sealing body, the wide groove is sealed with the sealing body to prevent concrete from entering the narrow groove, and the projection is applied from the inner surface of the PC product in the same manner as above. It is possible to project by projecting an object.

Further, according to a third aspect of the present invention, a seal body is mounted so as to cover the tip end portion of the projection, and the seal body is fitted into the groove to allow concrete to enter the groove. It is possible to reliably prevent the above-mentioned problem, and to project the protrusion from the inner surface of the PC product in the same manner as described above.

Furthermore, in claim 4 of the present invention,
The seal body is divided into a plurality of pieces, and the tip portions of the protrusions are respectively fitted to the divided seal bodies to form protrusion pieces,
By sequentially fitting and setting the seal body of the protrusion piece in the groove, it is possible to simplify the mounting work of the protrusion when the protrusion is projected from the inner surface of the PC product and molded. It has an excellent effect.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of an inner mold of a PC product molding mold according to the present invention.

FIG. 2 is a perspective view showing an example of a bar arrangement state of a PC product molded using the PC product molding frame according to the present invention.

FIG. 3 is an enlarged sectional view of an essential part showing a state in which a seal body used in a PC product molding frame according to the present invention is set.

FIG. 4 is a perspective view showing an upper end portion of an embodiment of a PC product molded by using the PC product molding frame according to the present invention.

FIG. 5 is an enlarged perspective view showing an example of an attached state of the seal body used in the PC product molding frame according to the present invention.

FIG. 6 is an explanatory view showing an example of a molding process using a PC product molding frame according to the present invention.

FIG. 7 is a perspective view showing another embodiment of the inner mold of the mold for molding a PC product according to the present invention.

FIG. 8 is a perspective view showing another embodiment of a bar arrangement state of a PC product molded using the PC product molding frame according to the present invention.

FIG. 9 is a perspective view showing an upper end portion of another embodiment of a PC product molded by using the PC product molding frame according to the present invention.

FIG. 10 is an enlarged perspective view showing another embodiment of the attached state of the seal body used in the PC product molding frame according to the present invention.

FIG. 11 is a perspective view of a protrusion piece used in another embodiment of the PC product molding frame according to the present invention.

FIG. 12 is a cross-sectional view of essential parts showing a mounting state of a protrusion piece used in another embodiment of the PC product molding frame according to the present invention.

[Explanation of symbols]

10 PC product molding frame 12 Column PC
Formwork (PC product) 14 Inner formwork 14a Forming surface 16 Outer formwork 30 Groove 30a Small groove 30b Wide groove 34 Anchor bar (projection) 36 Seal body 40 Seal body 42 Groove 50 Seal body 52 Anchor bar (projection) 54 Protrusion piece

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hideo Okamoto, 2-3 Kandaji-cho, Chiyoda-ku, Tokyo Obayashi Corporation Tokyo headquarters (72) Toru Ohno 2-3, Kandaji-cho, Chiyoda-ku, Tokyo Obayashi Corporation Tokyo Head Office (72) Inventor Ritsuo Matsumura 2-3 Kandajicho, Chiyoda-ku, Tokyo Obayashi Corporation Tokyo Head Office

Claims (4)

[Claims] 1. After arranging the inner and outer molds substantially concentrically, the space between these molds is filled with concrete to fill the PC.
In the mold for molding the product, on the molding surface of the inner mold,
A groove for inserting a protrusion to be projected from the filled concrete surface is continuously formed along the demolding direction of the mold, and a seal body is detachably attached to the protrusion,
A mold for molding a PC product, characterized in that, when the protrusion is inserted into the groove and set, the groove is sealed by the seal body. 2. A narrow groove formed with a width and a depth into which the protrusion can be inserted, and wide grooves formed shallow on both sides of the opening of the narrow groove are provided in the groove, and the wide groove is formed by the sealing body. The mold for molding a PC product according to claim 1, wherein the mold is continuously covered. 3. The PC product molding frame according to claim 1, wherein the tip of the protrusion is covered to mount the seal body, and the seal body is fitted in the groove. . 4. The seal body is divided into a plurality of pieces, and the divided seal bodies are fitted with the tips of the protrusions to form protrusion pieces. The seal bodies of the protrusion pieces are formed in the grooves. The mold for molding a PC product according to claim 1, wherein the molds are successively fitted and set.