JPH06206215A - Thin plate reinforcing plate and production thereof - Google Patents

Abstract

PURPOSE:To rationally and inexpensively produce a mortar plate material having high strength and accuracy by internally providing a tensile strength material and driving a square thin plate provided with cavity holes in the upper surface of a hydration reaction cured plate material to constitute a reinforced thin plate reinforcing plate. CONSTITUTION:The periphery of a reinforcing thin plate 1 composed of a steel plate subjected to press processing is erected and attaching round cavity holes 2 are provided to four corner parts thereof and cavities built up in a truncated cone shape are provided inside the cavity holes 2. Reinforcing square bars 4 bent in a horizontal V-shape in the vicinity of the central parts thereof are provided to four peripheries so as to pass the outsides of the cavity holes 2 and reinforcing round bars 6 are provided on the upper side of the central parts thereof. A mortar material 6 is provided on the reinforcing thin plate 1 and allowed pierce through the cavity holes 2 to constitute a thin plate reinforcing plate A. By this costitution, a mortar plate material having high strength and accuracy is rationally and inexpensively produced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a precast mortar board used for construction and civil engineering, and a method for producing the mortar board.

[0002]

2. Description of the Related Art Conventionally, mortar boards have been reinforced by inserting fibers such as reinforcing bars and glass into the mortar. 2. Description of the Related Art In recent years, there has been a floor panel for double floors made of mortar, in which a steel plate having a large number of rectangular holes cut out with one side left as a nail is punched into the bottom surface of the mortar plate for reinforcement. In addition, the conventional mortar plate manufacturing method is a sturdy iron mold system that can be repeatedly disassembled and assembled and uses a heavy iron formwork that uses mortar with a water-cement ratio of 50% or more and a bottom plate type machine. Place it in a mold and put mortar with a water-cement ratio of less than 50% into a dish mold to reduce the amount of water by pressing from the side and top with a pressing die attached to the machine, or dehydrate and take out only with a dish mold. There is an instant demolding method.

[0003]

[Problems to be Solved by the Invention]
In the assembled iron mold system, although the formwork is expensive, the rotating efficiency of the formwork is poor, and the formwork and the material are heavy, so the manufacturing cost is high, and it has become difficult to secure employees in recent years. Since the instant demolding method is almost entirely machine-made, there is no problem in terms of workers. However, since the mold is removed immediately, the surface is dried in the summer, and the water necessary for the hydration reaction of the mortar is insufficient, and the surface and the corners, which are important for strength, are weakened. It is well known that the strength of cement products increases by 50% or more when cured in water. In this case, since the reverse is performed, the strength is naturally adversely affected. It should be noted that the product has a rough and rough finish because there is no laundering component that fills the details together with the water content. Also, the driving surface side is sponge-like and dehydrated, so that it is not smooth and uneven in thickness. And, it is difficult to make a shape that is too complicated because the corners are easily chipped. Currently, in the case of floorboards with severe thickness accuracy, thickness unevenness is ground and rectified, but this is extremely troublesome.

On the other hand, the reinforcing bars of the tensile strength material must be put inside for fixing, and the mortar for the covering thickness becomes an excessive weight. And, the reinforcing bars have directionality, and there is a difference in the vertical direction. Another problem is that even alkali-resistant glass fibers, which are strong reinforcing materials, deteriorate in strength in cement over a long period of time, and it is difficult to mix and align the directions, which is very expensive.

In this respect, the reinforcing of the backing of the steel plate with the square nails has the function of fixing by the nails and resists the tensile force on the plate surface. However, the notch becomes a complete mechanical defect, and the hole with an acute angle tends to have the smallest tensile cross-sectional area. In the case of a round hole, it is the smallest in any direction. Further, if the raised portion is formed by connecting the periphery of the hole, the mechanical loss of the member is minimized. However, in any mortar plate, the mold surface is often indeterminate or absent on the upper surface side and the edge portion thereof, so that the finished state is very unsightly. Especially for floor boards where cords are taken in and out from the end, there is a risk of damaging the cords, which is a serious problem. In consideration of this point, the present invention solves the above-mentioned problems in the mortar plate and its manufacturing method.

[0006]

In order to achieve the above-mentioned object, the thin plate reinforcing plate of the present invention has a tensile strength material appropriately placed inside, and a hollow hole or a hollow is appropriately formed on the upper surface of the hydration reaction hardening material plate. The feature is that the provided rectangular thin plate is reinforced by driving.

The method for manufacturing a thin reinforcing plate of the present invention is
Reinforcing reinforcing bars are placed on a square plate-shaped thin film frame placed on the bottom plate, and a prescribed amount of hydration reaction hardening material, or reinforcing fiber material, lightweight aggregate, and prescribed strength hydration reaction containing tensile strength material Hardened material,
Alternatively, a predetermined amount of the hydration reaction hardening material containing a part of them is put into the mold and spread into the mold, and a hollow hole or a rectangular thin plate appropriately provided with a depression is provided on the surface of the hardening material. Place the thin plate in the mold so that the back surface of the thin plate is in contact with the hardened material by applying vibration to the mold, and after the hardened material is hardened, the thin plate is removed from the mold to manufacture the thin plate. It is characterized by

[0008]

According to the thin plate reinforcing plate of the present invention having the above characteristics, normally the hydration reaction hardening material and the thin plate are easily peeled off, and peeling occurs at the interface, but if the recessed portion is provided at an angle close to 90 degrees to the thin plate. , The fixing is performed uniformly around the recess in all directions, and the synthetic force of the thin plate and the hydration reaction hardening material works effectively.
In the case of a hollow hole, the thin plate that resists the tensile force on the plate surface is a hollow portion that is connected around the hole, and therefore has a tensile cross-sectional area to minimize the mechanical loss of the member. In addition, since both sides of the thin plate are connected by the maximum opening area, the hydration reaction hardening material has the minimum breaking force at the position of the thin plate surface. Especially when it is used as a floor plate and the thin plate is on the lower side, the tensile force acts most on the thin plate and it is difficult to deform, and the thin plate and the hydration reaction hardening material are firmly fixed in the holes etc., so the hydration reaction hardening The release side of the material is also less likely to shrink and warp. In general, the plate of the hydration reaction material is heavy, but the depression can be provided with a concave portion on the driving surface side, and the weight of the plate material can be reduced. In addition, the three-dimensional structure of the thin plate is also effective against bending stress and shear stress from the normally weak thin plate side.

According to the method for manufacturing a thin plate reinforcing plate of the present invention having the above characteristics, a thin film mold can be used by laying a metal bottom plate under the mold to add a hydration reaction hardening material. Immediately afterward, it does not easily deform even if it is moved in the work process. Further, by accurately adding a predetermined amount of a hydration reaction hardening material, a lightweight aggregate or other tensile strength reinforcing material to the mold and vibrating the mold, air bubbles escape from the upper surface and are densely filled. The top surface becomes horizontal. When a thin plate with cavities or holes is placed on it and vibrated again, the hydration reaction hardening material rises from under the depressions or cavities and the thin plate sinks into the hydration reaction hardening material. . After the hydration reaction hardening material hardens, the dents and the parts that go into the dent holes solidify so that they firmly set in place without coming off.

[0010]

EXAMPLES Examples of the thin reinforcing plate according to the present invention will be described below with reference to FIGS. 498m on the bottom side of the whole
Reinforced thin steel plate 1 with a thickness of 0.6 mm squared up a few 〓 with rounded corners, and a straight type 20 mm for mounting at the four corners.
The round recessed holes 2 are provided, and 12 rows are arranged at equal intervals vertically and horizontally inside the hole.
Direct type 20mm, height 6mm, circular trapezoidal raised 3
Add individual pieces. On the 4th circumference, 5mm round reinforcing square bar 4 that passes through the outside of the recessed hole 2 and has four corners that are high and bent in a square shape near the center of the side is inserted. Four
Make a ring of 00 mm and insert the reinforcing round bar 6. The mortar material 7 is attached to the upper side of the reinforcing thin plate 1 with a thickness of 20 mm, and the mortar material is penetrated to the upper surface with the same diameter as the recessed hole 2 at the four corners, and the diameter of the upper surface is 33 mm. , A thin reinforcing plate A with a hole expanded at a height of 1 mm. The reinforcing plate A may be appropriately chamfered at the four corners or the ridgelines of the four sides, and the number of depressions may be more or less. Further, the reinforcing bars may be put in one on top of the other, or may be replaced with another shape having a stronger strength.

In another embodiment, on the bottom side of the whole, a reinforced thin plate 1 made of a 498 mm square and 0.6 mm thick pressed steel plate is raised around a few 〓 corners, and 10 M are previously attached to the four corners. A straight type 12 mm round hole 5b is formed by welding an internal female screw 5a on the upper side, and 140 rounded trapezoidal dents 3 of 12 rows straight type 20 mm height 6 mm are provided on the inside thereof at equal intervals in vertical and horizontal directions. On the 4th circumference, 5mm rebar passes through the outside of the round hole 5b, and a reinforcing square bar 4 bent in a V shape is inserted near the center of the side, and a 4mm rebar is placed on the upper side of the center and has a diameter of 400mm. Then, insert the reinforcing round bar 6. Then, the mortar material 7 is attached to the upper side of the reinforcing thin plate 1 with a thickness of 20 mm, and the round hole 5b at the four corners is penetrated to the upper surface with the mortar material with the same diameter as the round hole. . The reinforcing plate B may also be appropriately chamfered at the four corners or the ridge, and the number of depressions may be large or small. Further, the reinforcing bars may be overlapped and may be replaced with another shape having a stronger strength. In addition,
The steel plate of the reinforcing thin plate 1 of the thin reinforcing plates A and B may be a plated steel plate or a coated steel plate.

In addition to the embodiments shown above, the thin plate reinforcing plates A and B are press-formed by providing the reinforcing thin plate 1 with one or more semicircles or square notches along the sides as appropriate. The mortar material 7 may also be formed by forming a semicircle having a position and size corresponding to the reinforcing thin plate 1 or a rectangular notch.

The thin plate reinforcing plates A and B of the above embodiment are
It is assumed that the reinforcing thin plate 1 is press-processed by providing a circular or square stepped raised portion between the center of the surface, the center of the side and the center of the surface, or between the corner and the center of the surface. It may be formed by forming a circular or square cutout portion in the center of the surface that coincides with the thin plate 1, between the center of the sides and the center of the surface, or between the corner and the center of the surface.

Next, an embodiment of the method for manufacturing the thin reinforcing plate according to the present invention will be described with reference to FIG. On a horizontal vibrating table 10
Place a flat bottom plate 11 that is larger than 500mm, and set a small protrusion 12 on the bottom side one surface on it, stand up 20mm on all sides, and 20mm outward.
A groove 14 having a depth and a width of 5 mm extended as a peripheral edge 13 is provided at the outermost end of the edge, and stepped cylindrical raised portions 15 are provided at the four corners on the bottom side, and vacuum forming is performed at 0.2 to 2.0. mm thickness, 498 mm
Place a sheet-shaped resin mold C in the corner.

Next, a reinforcing round bar 6 is placed on the center of the form C, and the reinforcing angle bar 4 is bent in a square shape at the center on the inner four circumferences. Then mix the fluidizing agent and the water-cement ratio is 10-50.
% Of mortar material D or a predetermined amount of mortar material D containing reinforcing fiber material or lightweight aggregate in the mold C, and the mold is vibrated by a few thousand vibrations per minute. Level.

Then, a round hole is formed at least at four corners by press working, and the periphery of the round hole is bent downward together with the outer periphery to form a recessed hole 2, and a substantially square shape in which the inside is appropriately recessed symmetrically. A reinforcing thin plate 1 made of a plated thin steel plate or a decorative thin steel plate is placed on the mortar material D, and is again vibrated to be leveled, whereby the upper tiers of the cylindrical raised portions 15 at the four corners of the form C are When the lower ends of the bent portions 2a of the recessed holes 2 at the four corners of the thin plate 1 are placed, the upper surface of the thin plate 1 is at the same height as the upper surface of the peripheral edge 14 of the mold C, and the mortar material D is the mold. The predetermined amount of the mortar material D is determined so that the inside of C and the inside of the thin plate 1 are almost filled.
Is cured together with the reinforcing thin plate 1 and released from the mold C,
A method for manufacturing a thin reinforcing plate for manufacturing a reinforcing plate A having round holes at four corners.

Further, as shown in FIG. 4, the thin plate 1 of the thin steel plate
Is placed on the vibrating machine 10, and the mortar material d is poured into the inside thereof in advance in the same manner as the formwork C by vibrating so as to cover the back surface of the thin plate, and the mortar material d remains on the back side. Alternatively, the thin plate 1 may be quickly overlaid on the mortar material D in the mold C to apply vibration to integrate the mortar materials d and D. Further, the reinforcing bars may be put in one on top of the other, may be replaced with ones having a different shape, or they may be integrally combined in advance. It should be noted that the dimensions and the like of the above-described various embodiments may be appropriately changed if they meet the object of the present invention.

In addition to the embodiment shown above, the mold is vacuum-formed by providing at least one semicircle or a rectangular step-shaped raised portion along at least one side, and the steel plate is the mold. A semi-circle having a position and size corresponding to the frame, or a rectangular cutout provided and pressed, and a semi-circular reinforcing plate having a semi-circle or a square cut may be manufactured along the side. .

The formwork is vacuum-formed by providing a circular or rectangular step-like raised portion between the center of the surface, the center of the sides and the center of the surface, or between the corner and the center of the surface. As the center of the surface at the position corresponding to the mold, between the center of the side and the center of the surface, or between the corner of the surface and the circle, or as a rectangular cutout provided with a cutout portion having a size matching the mold, You may manufacture the thin plate reinforcement plate with a hole suitably.

[0020]

As described above, the thin plate reinforcing plate according to the present invention has an edge portion in which the upper peripheral ridge line portion is rounded and chamfered. Except for the thin plate surface, the other five surfaces are formed with a mold, and the finished state is very smooth on all surfaces. In particular, a thin plate bent at the end with a press to be formed into a round shape does not damage the cord for a floor plate in which cords are taken in and out from the end.

Further, the ring-shaped reinforcing bar prevents the shrinkage of the upper hydration reaction hardening material without a thin plate, and the angular reinforcing bar reinforces the side where breakage easily occurs, and also shears the corner.

In the case of the thin reinforcing plate of the present manufacturing method, the thin plate enters the lowermost surface of the hydration reaction hardening material and is hardened. In contrast to the fixation of the thin plate and the hydration reaction hardening material, which is an important resistance element due to loading, the recess has a strong integral structure and resists slippage in the entire recess, and the thin plate works most advantageously as a tensile member. It should be noted that the weight of the hardening material is lost only in the depressed portion, and the weight becomes light.

Further, in the method for manufacturing a thin reinforcing plate according to the present invention, the outer shape of the rectangular vacuum-formed sheet frame cannot be easily maintained by itself, but by laying a rigid bottom plate, Has the same rigidity as the bottom plate. However, demolding is conversely very easy.

The mortar material having a water-cement ratio of 10% to 50% and containing a fluidizing agent or the like is in a dry and dry state and is easy to handle without sticking to a container or the like. If it is measured by weight, it can be easily and accurately taken in a fixed amount.

Then, when the mortar material is put into a mold placed on a bottom plate on a horizontal vibrating table and then vibrated, the mortar material flows and becomes a little lower than the upper end of the mold and becomes horizontal. Then, when a hollow hole of a thin plate of a steel plate is inserted into the stepped cylindrical raised portion and vibrated again, the form naturally sinks and the lower end of the depressed hole is placed on the upper stage of the stepped raised portion. At that time, if the height of the hollow of the hole and the height of the upper step of the stepped raised portion are matched so that the upper end of the formwork and the upper surface of the thin plate are at the same height, the reinforcing plate made of mortar will have a thickness around the hole. All can be easily arranged.

Further, the mortar material becomes dense by eliminating vibration without bubbles, and if it is cured and demolded, it becomes a very strong plate with rounded corners and is not easily chipped during transportation.

Since both the resin mold and the thin plate are made from the mold, the precision is high and the thin plate and the mold fit exactly. If the thin plate 7 is made of a plated steel plate, the cut end surface will be the part without plating,
If the upper and lower molds are the same, the mortar material just hits the end face to prevent rust.

If the mortar material is thinly fluidized and put in the thin plate in advance, the mortar material does not easily fall even if the mortar material is quickly turned over because there is no air between the mortar material and the thin plate. Therefore, the mortar material in the mold and the mortar material in the thin plate are combined without leaving air inside the thin plate.

When a resin mold having a smooth and large surface is formed by vacuum molding, air is likely to remain between the mold and the resin, and a flat surface cannot be obtained properly. However, if a small air vent hole or a groove of a lattice is formed as in the example of the manufacturing method of the present invention, a flat surface can be obtained without collecting air, and if the resin mold is used, the flatness of the bottom surface of the mortar plate is easy. Can be kept

The mortar material put into the mold applies lateral pressure to the vertical frame of the mold, and the vertical frame spreads outward. In that case, if a groove or a reverse groove is provided on the outer periphery of the peripheral edge of the vertical frame as in the embodiment, the outer periphery of the peripheral edge does not move up and down and is strong against the lateral pressure trying to spread outward. The linearity of the side surface of the thin reinforcing plate can be easily maintained.

Cement-based products hardened in a hard mold or the like are very difficult to remove from the mold, but the resin mold according to the present manufacturing method placed on the bottom plate is a mold manufactured by a mold, In addition to having a natural demolding gradient in manufacturing, it can be considerably deformed, and the mortar material placed in the mold is easy to demold. Further, even in a complicated shape, fine granular aggregates and cement at the corners do not flow out together with water and are round and smooth.

In the case of the mortar board used for the floor board, it is necessary to align the lid for the outlet and the like with the upper surface of the mortar board, but this manufacturing method can easily make it. Along the edge of the sheet-shaped resin mold, a half-hole raised portion is provided in alignment with the upper end of the vertical frame, and a lower raised portion with a shallow lid is formed around the raised portion. Then, it is easily obtained by providing the thin plate with a bent portion of a semi-hole corresponding to the raised portion and stacking them.

The hole for the outlet can be made by combining two floor panels having half holes at the ends as described above, but it can also be independently swelled in an island shape on the bottom surface of the mold. The bottom of the formwork is provided with a raised portion for holes such as for outlets, a lower raised portion with a shallow lid is formed around it, and a thin plate is provided with a bulging hole that matches the raised portion, and the same as above. Obtained by stacking.

[Brief description of drawings]

FIG. 1 is an explanatory perspective view of a reinforcing plate.

FIG. 2 is an explanatory perspective view of a reinforcing plate.

FIG. 3 is an explanatory perspective view of a reinforcing plate manufacturing method.

FIG. 4 is an explanatory perspective view of a reinforcing plate manufacturing method.

[Explanation of symbols]

A Reinforcing plate 5a Female screw B Reinforcing plate 5b Round hole C Form 6 Reinforcing round bar D Mortar material (inside frame) 7 Mortar (hardened) d Mortar material (in thin plate) 11 Bottom plate 1 Reinforcement thin plate 12 Small protrusion 2 Recessed hole (2a bent portion) 13 Surrounding edge 3 Recess 14 Groove 4 Reinforcing angle bar 15 Circular raised portion

Claims (10)

[Claims] 1. A thin plate reinforcing plate in which a tensile strength material is appropriately placed inside, and a rectangular thin plate having appropriate depression holes or depressions is punched into the upper surface of a hydration reaction hardening material plate for reinforcement. 2. A ring-shaped reinforcing bar is inserted in the center of the bottom side of the hydration reaction hardening material plate, and angular reinforcing bars are bent around the upper side of the reinforcing bar by bending the four corners downward, and to the uppermost surface thereof. A thin plate reinforcing plate that is reinforced by driving a rectangular thin plate that is appropriately provided with a hollow hole or a hollow. 3. The thin plate reinforcing plate according to claim 1, wherein at least part of the periphery of the thin plate is bent downward, and at least part of the periphery of the upper surface of the hydration reaction hardening material plate is wrapped and driven. 4. The thin plate reinforcing plate according to claim 1, wherein metal fittings for attachment to another material are provided at four corners of the tensile strength material or four inner corners of the thin plate. 5. The thin plate reinforcing plate according to claim 1, wherein vertical holes for attachment to another material are provided at the four corners reinforced with the tensile strength material or at the four corners inside the recessed hole of the thin plate. 6. A reinforcing plate is placed on a square plate-shaped thin film mold placed on a bottom plate, and a predetermined amount of a hydration reaction hardening material, or reinforcing fiber material, lightweight aggregate, and tensile strength material is contained. Of the hydration reaction hardening material, or a predetermined amount of the hydration reaction hardening material containing any one of them is put into the mold and expanded into the mold, and a hollow thin plate or a rectangular thin plate appropriately provided with a depression is formed. Placed on the front side of the hardened material, the thin plate is sunk into the mold so that the back surface of the thin plate contacts the hardened material by applying vibration to the mold, and after the hardened material is hardened, from the mold. A method for manufacturing a thin reinforcing plate, which is manufactured by demolding the thin plate together. 7. A portion of a predetermined amount of the hydration reaction hardening material within the back surface of the thin plate, or a portion of a predetermined amount of the hydration reaction hardening material containing reinforcing fiber material, lightweight aggregate, and tensile strength material, Alternatively, a portion of a predetermined amount of the hydration reaction hardening material containing either of them is introduced and spread into the back surface of the thin plate, and the thin plate is placed on the bottom plate with the back surface side facing downward and the thin plate-shaped thin plate The thin plate is placed on the surface of the hardened material in the mold, and the thin plate is housed in the mold so that the back surface of the thin plate contacts the hardened material by applying vibration to the mold. The method for manufacturing a thin plate reinforcing plate according to claim 6, wherein the whole plate is demolded from the mold. 8. The mold is a rectangular plate-shaped thin film mold in which cylindrical step-shaped raised portions are formed at four corners, and the thin plate is surrounded by a perimeter so that the thin plate fits into the cylindrical step-shaped raised portions of the mold. A round recess hole bent downward is provided, at least a part of the periphery of the thin plate is bent downward, and the bent portion is fitted to at least a part of the periphery of the upper surface of the formwork, and the thin plate is formed. After the hydration reaction hardening material has hardened, the thin plate is released from the mold, through holes are provided at four corners of the hydration reaction hardening material plate, and at least part of the periphery of the upper surface is the thin plate. 7. A method for producing a wrapped thin plate reinforcing plate,
And a method for manufacturing a thin reinforcing plate according to 7. 9. The thin plate according to claim 6, wherein the mold is manufactured by using a plurality of small projections provided on the inner surface of the bottom surface thereof, or by forming a low lattice-like narrow peak formed on one surface of the mold. Manufacturing method of reinforcing plate. 10. The mold is provided with an upper edge on the outside of the upper surface of the vertical frame in parallel with the outer shape of the frame, and a groove of one or more layers or a reverse groove is provided on the outer end of the upper frame to reinforce the upper end of the vertical frame. The method for manufacturing a thin reinforcing plate according to claim 6, which is manufactured by using the molded product.