JP2000185305A - Manufacture of residual form having a large number of holes - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of a residual form having a large number of holes, with which its productivity is improved and a mass production becomes possible. SOLUTION: Onto a production mold main body 1, from the lattice-like bottom surface of which a large number of hole-forming pins 1b are disposed in upright, a bottom plate 2, onto which the pins 1b penetrate from above, is inserted onto the bottom surface and, a wire gauze 31 is held afloat at the midway of the pins 1b. Next, a ready-mixed concrete, the slump of which is zero, is placed from above in the production mold main body 1 so as to compress from above and compact the ready-mixed concrete under the state that the production mold main body is vibrated. Finally, by pushing up the bottom plate 2 from below, the compacted ready-mixed concrete is immediately demolded from the production mold main body 1 so as to cure and set the compacted ready-mixed concrete on the bottom plate 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to Japanese Patent Application No. 9-1143.
No. 11, Japanese Patent Application No. 10-71408, Japanese Patent Application No. 10-14
The present invention relates to a manufacturing method for efficiently manufacturing "residual formwork" proposed in Japanese Patent Application No. 8464 and Japanese Patent Application No. 10-178100.

[0002]

2. Description of the Related Art Conventionally, when constructing a concrete retaining wall, a sabo dam, a bridge pier, or the like, a residual formwork proposed by the present inventor is often used as a wall material attached to the surface thereof. This residual form is generally manufactured with a lot of residual formwork finished on the front side, but the residual formwork with holes used on the back side and the part that can not be seen on the base part is because the structure of the manufacturing mold is complicated In addition, the demolding work is difficult, and the productivity is poor, so that mass production is difficult.

[0003]

For this reason, there has been a demand from customers for the development of a method of manufacturing a residual form having a large number of holes, which increases the productivity of the residual form with holes and enables mass production. I was

[0004] In a method of manufacturing a residual mold having a front side finished, a manufacturing die having a double structure of an outer frame and an inner frame is used, and the inner frame has a box shape that can be stored in the outer frame. An integrated member or a member whose periphery and bottom are separable are used. or,
When the remaining mold on the front side is manufactured by using the manufacturing mold, the outer frame is fixed in advance on the table vibrator, and the inner frame is put into the outer frame and withstands vibration. Housed. Next, a reinforcing wire mesh is floated from the bottom and attached. Thereafter, a fluid concrete is poured into the inner frame and vibration is applied to fill the material. After filling, the inner frame was taken out from the table vibrator, and after the concrete was solidified, the remaining form was taken out from the inner frame to complete the product. However, when the remaining formwork having the double structure and having a large number of holes is manufactured, since there are a large number of holes forming pins penetrating the bottom plate of the inner frame, a fluid concrete is provided.
In the current situation, the inner frame cannot be pushed up until after the whole has solidified, resulting in extremely poor productivity. For this reason, the inventor of the present invention has also studied the production of a residual form with holes by forming a plate having a constant area with a raw concrete of zero slump and burying a wire mesh therein. It has just been done. However, when the raw concrete is molded by applying strong vibration compaction or pressure to the raw concrete, immediately after being taken out of the outer frame, the space between the many pins and the formed holes gradually increases and the mortar that falls falls. It is deposited inside the outer frame. Therefore, it was necessary to remove the falling mortar, which was troublesome, the productivity was reduced, and it was difficult to produce inexpensively and mass-produce.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem. That is, a manufacturing die body having a large number of pins for forming holes from a lattice-like bottom surface is provided.
Insert the bottom plate into which the pin penetrates from the top to the bottom and hold the wire mesh floating in the middle of the pin, then put the raw concrete of zero slump from the top into the production mold body,
While the production mold body is vibrated, the raw concrete is compressed from the top and compacted, and the bottom plate is pushed up from below to compact the raw concrete immediately from the production mold body, and the bottom plate is removed. A manufacturing method of curing and solidifying above.
In the present invention, "zero slump raw concrete" refers to a material used in the immediate demolding method, and a material in which slump becomes zero in a slump test of a concrete.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 2 is a view showing a main part structure of a manufacturing die used in the present embodiment, and the drawing numbers will be explained based on this. (1) is a production die body attached to the vibrating part of the vibration press machine (4), and the production die body (1) is provided.
The bottom surface (1a) is formed in a lattice shape, and a large number of holes forming pins (1b) are erected on the upper surface of the bottom surface (1a). The pin (1b) is formed in a substantially conservative shape using wear-resistant metal, and a screw rod is extended below the pin and fixed with a mounting nut. An inner piece (1c) for forming a chamfer (3b) around a remaining mold (3) having a large number of holes (3a) on the inner periphery of the manufacturing mold body (1). Is fixed. (2) is a metal bottom plate which can be inserted from above into the inside of the production mold body (1). The bottom plate (2) has a large number of holes through which the pins (1b) can penetrate. I have. It is preferable to use a plurality of reinforcing members provided under the bottom plate (2) to reduce the weight. When manufacturing the remaining formwork (3), the bottom plate (2) is taken out while being attached to the bottom of the remaining formwork (3). Therefore, it is preferable to prepare a large number of bottom plates (2). (5) is a bottom plate lifting means having a plurality of lifting pins and capable of being lifted, and may have a structure used in a general mechanical device or the like.

FIG. 1 is a view showing a manufacturing method of the present invention.
Description will be made based on this. The manufacturing die is previously mounted on the vibration press machine (4), and the operation of the bottom plate lifting means (5) is confirmed and arranged beforehand (see FIG. 1 (a)). First, a bottom plate (2) is placed inside a manufacturing mold body (1) from the top.
Is inserted while penetrating the pin (1b), the bottom plate (2) is placed on the upper portion of the bottom surface (1a) [see FIG. 1 (b)]. Next, when a reinforcing wire mesh (31) is placed inside the manufacturing mold body (1), the mesh is caught in the middle of the pin (1b).
It is held in a state of floating in the middle [see FIG. 1 (c)].
The size of the mesh of the wire mesh (31) at this time is the pin (1b)
The size may be such that it is hooked on and floats on the way. This completes the preparation. Then, a raw slump of zero slump is put into the production mold body (1) from above, and the raw concrete is compressed from above and compacted while vibrating the production mold body (1) [FIG. (D)], and the bottom plate lifting means (5) operates to operate the bottom plate (2).
Is pressed down from below, and the compacted raw concrete is immediately removed from the production mold body (1) [see FIG. 1 (e)]. At this time, the raw concrete that has been pushed up and compacted is pushed up with the bottom plate (2) interposed therebetween, so that it can be smoothly taken out with a stable force and without applying an impact force. It is carried out to a predetermined position and is cured and solidified on the bottom plate (2). In addition, as the curing, a generally used method may be used. If the bottom plate (2) is removed after curing and burrs are removed as necessary, the remaining formwork (3) as shown in FIG. 3 is completed.

In the manufacturing die body (1), after the raw concrete, which has been pressed up and compacted by the bottom plate (2), is carried out of the manufacturing die body (1), the bottom plate lifting means (5) is used. ) Is actuated, the push pin is lowered, and there is no bottom plate (2) [see FIG. 1 (f)]. Since the zero slump raw concrete is used at the time of demolding, the bottom plate (2) can be immediately demolded by pushing up the bottom plate (2). Also, when the pin (1b) is pulled out from the hole (3a) of the remaining form (3) of the compacted raw concrete, the mortar that falls is dropped from there because the bottom surface (1a) is in a lattice shape. , Hardly remains on the upper part of the bottom surface (1a). Even if some mortar remains on the bottom (1a), if the weight is reduced by attaching a reinforcing material to the bottom plate (2), the periphery of the bottom plate (2) and the reinforcing material will be pins (1b).
Since it is provided away from the main body, there is no adverse effect even if the production is continued without contact. In addition, when the next production is performed, the whole production die body (1) vibrates, and the mortar falls naturally while compacting the raw concrete of the zero slump, so that air, brush, etc. Therefore, it is not necessary to remove the mortar remaining inside the manufacturing mold body (1) one by one. In this way, by following the above steps, continuous production can be performed, and mass production becomes possible.

[0009]

The present invention having the above-described structure has the following effects.

A bottom plate (1) in which the pins (1b) penetrate from the top into the manufacturing mold body (1) in which a large number of pins (1b) for forming holes are erected from the lattice-shaped bottom (1a). 2) Insert the wire mesh (31) into the pin (1b) while inserting the bottom to the bottom (1a).
The raw concrete of zero slump is put into the production mold main body (1) from the upper part, and the raw concrete is compressed from the upper part while vibrating the production mold main body (1). And pressing the bottom plate (2) from below to immediately release the compacted raw concrete from the production mold body (1), and curing and solidifying on the bottom plate (2). Thereby, a large number of holes (3a) are easily provided in the remaining formwork (3), and mass production becomes possible. Further, since raw concrete of zero slump is used and the remaining formwork (3) compacted on the bottom plate (2) can be taken out immediately from the production mold body (1), productivity can be remarkably improved. Product cost can be reduced. Moreover, when removing the remaining formwork (3), only the bottom plate (2) needs to be taken out as the inner frame, so that it becomes extremely light and the actual work can be performed simply and quickly. Further, since the remaining formwork (3) is cured on the bottom plate (2), deformation, chipping, cracking, etc. hardly occurs, and stable quality can be obtained. Further, when the molded remaining mold (3) is taken out from the inside of the production mold body (1), the mortar falling from the hole (3a) passes through the lattice-shaped bottom surface (1a), and the production mold body ( Since it falls naturally to the outside of the lower part of 1) and hardly remains in the inside of the production die body (1), it is possible to produce continuously.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing main steps of a manufacturing method of the present invention.

FIG. 2 is an explanatory diagram showing a main structure of a manufacturing die used in the embodiment.

FIG. 3 is a cross-sectional view illustrating a main structure of a remaining formwork manufactured by the method of the present invention.

[Explanation of symbols]

 1 Manufacturing die body 1a Bottom 1b Pin 2 Bottom plate

Claims (1)

[Claims] 1. A bottom plate (2) through which the pins (1b) penetrate from the top is inserted into a manufacturing mold body (1) in which a number of pins (1b) for forming holes are erected from a lattice-like bottom (1a). The bottom (1a)
Insert the wire mesh (31) for reinforcement and the pins (1
b) Float and hold in the middle of the process, then put a zero slump raw concrete from above into the production mold body (1), and vibrate the production mold body (1) to vibrate the raw concrete. Is pressed from above to compact it, and the bottom plate (2) is pushed up from below to immediately remove the compacted green concrete from the production mold body (1), and is pressed onto the bottom plate (2). A method for producing a remaining formwork having a large number of holes, wherein the form is cured and solidified.