JPH0431008A - Manufacture of concrete sheet and apparatus for displaying embedded item in concrete sheet - Google Patents

Abstract

PURPOSE:To fix embedded items without using a large amt. of labor by drawing kind, position and direction of the embedded item embedded in a concrete sheet on a light transmitting sheet as an accurate size-reduced figure, projecting it with expansion on a base stage, fixing the embedded item in accordance with this and feeding concrete there. CONSTITUTION:Kind, position, direction etc., of an embedded item is drawn on a light transmitting sheet 1 by means of a computer wherein they have been inputted and they are projected on a base stage 7 for manufacturing a concrete sheet by means of a projector 2. The embedded item 8 is fixed on the manufacturing base stage 7 in accordance with this figure. If a position of a frame is displayed on the light transmitting sheet, the frame as well as the embedded item can be fixed. After fixing of the embedded item 8 is complet ed, a specified amt. of concrete 10 is fed in the frame 9 by using a concrete bucket 11, etc. After the concrete is hardened to reach a specified strength, the frame is taken out to complete the concrete sheet.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a manufacturing method and an apparatus used for manufacturing concrete plates that are manufactured in a factory and assembled on-site to be used as structural members of a building. The present invention relates to a method by which concrete plates with embedded objects can be manufactured with less labor and to an apparatus used in this method.

(Prior Art) As a method of constructing a building, a method is known in which reinforced concrete plate members manufactured in a factory are assembled on site and used as floor members, wall members, balcony members, etc.

If these plate-like members are loaded as structural members and resist the load, it is necessary to embed reinforcing bars to bear the bow tension generated in the member, and if they are members that do not bear the load. It is also necessary to embed reinforcing bars to prevent cracks. In addition, for the interior decoration of buildings, inserts, wooden blocks, vibrators for passing power lines, cylindrical formwork to create spaces for passing water pipes, gas pipes, drainage pipes, etc. are buried. It is necessary to include it.

In the conventional method, to manufacture a concrete board as described above, first draw the outline of the concrete board to be manufactured on the top surface of a horizontally set production base, accurately measure the position of the object to be embedded, and mark it. draw.

Next, the embedded object is fixed in accordance with the markings drawn on the manufacturing base, the formwork that forms the external shape is fixed, and a predetermined amount of concrete is poured inside the formwork.

(Problem to be Solved by the Invention) However, with the above method, it takes a lot of time to accurately measure the position of the implant on the manufacturing base and to draw indications of the type, position, direction, etc. of the implant. It takes time and effort.

The present invention was made in order to solve the above-mentioned problems, and is to manufacture a concrete plate that allows the position of embedded objects to be indicated using a simple device and fixed without much effort. The object of the present invention is to provide a method and an apparatus for use in the method.

(Means for Solving the Problems) In order to solve the above problems, the present invention takes the following measures.

The type, position, and direction of the objects to be embedded in the concrete board are drawn on a light-transparent sheet as an accurate miniature drawing.

The image drawn on this light-transmissive sheet is enlarged and projected onto a concrete plate manufacturing base installed almost horizontally using a projection device having a light source and a plurality of lenses so as to match the actual dimensions.

In the projected state, the diagram displays the implant and fixes the implant accordingly.

After fixing the embedded material and the formwork, a predetermined amount of concrete is poured into the formwork, and after hardening, the formwork is removed to complete the concrete plate.

Further, in the above method, - a horizontal beam capable of being positioned on a production base of a plurality of concrete plates arranged in a row, and capable of running on a rail installed along the row of the production base; An embedded object display device is used in which the projection device is supported by a traveling frame.

The implant display device can be fitted with cover means that substantially covers the projection device and the projection area of the production base.

Also, said throw! It is desirable that at least one of the plurality of lenses included in the No. 5 device be a Fresnel lens.

(Function) When a concrete plate with embedded objects is manufactured using the method configured as described above, a display of the embedded objects is projected onto the manufacturing base as a diagram by a projection device, and the embedded objects are fixed in an accurate position according to this diagram. This eliminates the need for the process of measuring the position with a ruler or the like and writing it on the manufacturing board.

In addition, by supporting the above-mentioned projection device with horizontal beams of a traveling frame that can run on rails installed along a plurality of concrete production bases lined up in a row, the projection device can be projected onto a single production base and embedded objects can be projected onto a single production base. After completing the fixing work, it can be immediately moved to another manufacturing base and the work of fixing the implant can be done. At this time, the next process of pouring concrete can be performed on the previously manufactured base.

By providing a covering means that covers almost all of the projection device and the production base onto which the diagram is projected, the work can be carried out safely even when the work is carried out outdoors, regardless of the weather, and the brightness around the production base can be controlled. Appropriate brightness can be maintained so that the projected diagram is clear.

If one of the multiple lenses included in the projection device is a Fresnel lens, the reduction ratio of the scaled image drawn on the light-transmitting sheet can be increased, and the amount of light projected will also increase, allowing the area around the production base to be Even if the screen is bright, the projected diagram will be clear and work can be carried out quickly and safely.

(Example) Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic explanatory diagram showing an embodiment of the method for manufacturing a concrete plate having embedded objects according to the present invention;
) shows the process of projecting a diagram drawn on a light-transmissive sheet onto the production base using a projection device and fixing the implant according to the projected diagram, and (b) shows the process of fixing the implant after fixing the implant.
This shows the process of pouring a predetermined amount of concrete into the formwork.

Prior to these steps, the process of drawing the representation of the implant as a miniature drawing on the light-transparent sheet is not shown, but the type, position, direction, etc. of the implant are inputted and controlled by a computer on the light-transparent sheet. drawn out.

Note that this light-transparent sheet is not limited to the one drawn above, but may also be a production drawing drawn on plain paper that is copied onto film, or printed from this film onto a light-transparent sheet. It may also be an enlarged image drawn by a method such as .

The image drawn on the light-transmitting sheet as described above is projected by the projection device 2 shown in FIG. 1(a) onto the fabrication base 7 of a concrete plate installed substantially horizontally.

The projection device 2 is capable of refracting the light beam emitted from the light source lamp 3 by a Fresnel lens 4 and a projection lens 5, and reflecting it by a reflecting mirror 6 to irradiate it onto a horizontal surface. By inserting it into the light beam and fixing it, the image drawn on the light-transmitting sheet 1 is enlarged and projected onto the production base 7.

This projection device is supported so that it can be adjusted by moving in the height direction and left and right and front and back, and the projected plan is enlarged to match the actual dimensions of the concrete plate to be produced. Rates are adjusted.

Since the type, position, direction, dimensions, etc. of the implant are accurately drawn on the light-transparent sheet, the projected diagram shows the actual position, dimensions, etc. of the implant, making it easy for the operator to The implant 8 is fixed on the manufacturing base 7 according to this diagram.

It is also possible to display the position of the formwork on the light-transmissive sheet and fix the formwork together with the embedded object according to the projected diagram.

When the fixation of the implant 8 is completed, the projection device 2 is removed,
(b) As shown in the figure, a predetermined amount of concrete 10 is poured into the formwork 9 using a concrete packet 11 or the like.

After concrete is poured, it is allowed to cure and when it hardens and reaches a specified strength, the formwork is removed and the concrete plate is completed.

In this method, the embedded object 8 is fixed according to a diagram projected by the projection device 2, and the embedded object 8 is measured and drawn on the manufacturing base so that the position, dimensions, etc. of the embedded object are as shown in the manufacturing drawing. This eliminates the need for additional work.

In addition, the above-mentioned production base shall have running means such as wheels that run on rails, and after the work of fixing the embedded object is completed, the production base will be moved and concrete will be poured at another location. It is also possible to carry out the process of

In such a method, once the work of fixing the implant on one fabrication base is completed using a fixed projection device, and this fabrication base is moved, another fabrication base is moved under the projection device. Immediately you can start fixing the implant. At the same time, concrete pouring work can be performed on the previously manufactured base, making it possible to perform work efficiently.

FIG. 2 is a schematic front view showing an embodiment of the implant position display device according to the present invention, and FIG. 3 is a schematic side view.

Reference numeral 2 in the figure denotes a projection device that has a light source and a plurality of lenses and can project an image drawn on a light-transmitting sheet onto the upper surface of the production base 7.

The projection device 2 is supported by a horizontal beam 14 constructed directly above the production base 7 via an elevating guide frame 18, an elevating frame 19 that ascends and descends along the elevating guide frame, and a cart 20. The trolley 20 to which the projection device 2 is attached can move left and right on the lifting frame 19, and the lifting frame 19 can be moved up and down along the lifting guide frame 18. It is adjustable.

The horizontal beam 14 is supported by columns 13 near both ends.

The support column 13 has running wheels 15 at its lower end, and can run on rails 16 installed on both sides of a plurality of manufacturing bases 7 arranged in a row by a drive motor 17 having a speed reduction device. .

Reference numeral 23 denotes a cover means that almost covers the projection device 2 and the production base 7 on which the diagram is projected by the projection device, and includes a frame body 21 supported by the traveling frame 12 and a cover means stretched outside the frame body. It has a light shielding sheet 22. This cover means 23 substantially covers the projection device 2 and the production base 7 on which the diagram is projected, and blocks direct sunlight etc. even outdoors, making it dark to the extent that the diagram projected on the production base can be clearly seen. The light-shielding sheet 22 does not need to be able to completely block light. As the light-shielding sheet, for example, cloth, a vinyl sheet, etc. can be used, and a plate-like member can also be used instead of the light-shielding sheet.

To manufacture a concrete board using such an embedded object display device, the traveling motor 17 is driven to move the projection device 2 attached to the device to a position directly above the manufacturing base 7. Next, a light-transmitting sheet with the type, position, dimensions, etc. of the implant accurately depicted is set on the projection device 2, and
The position of the elevating frame 19 is adjusted so that the image projected from the projection device 2 matches the actual dimensions of the concrete plate to be produced on the production base 7. Fix the embeddings or the embeddings and the formwork according to the plan shown in Diagram 20.

When the setting of the embedding is completed, the embedding display device drives the travel motor 17, and the embedding display device drives the drive motor 17 to move the embedding onto other manufacturing bases. 5 Move to the position where the device is and repeat the above operations.

On the other hand, a predetermined amount of concrete is poured into the formwork on the fabrication base on which the embedded objects have been installed. After concrete is poured, it must be cured on the manufacturing base until it hardens and reaches a predetermined strength. However, the embedded object display device runs on the traveling rail 16 and all the objects placed on the - row are Since the projection device 2 can be moved directly above the production base, the devices on the stand can be moved sequentially to perform work, making it possible to efficiently produce concrete plates.

The production of concrete plates like the one above is mostly done outdoors, but on sunny days the surface of the production base becomes too bright and the diagrams projected by the projection device can be clearly seen. Sometimes there isn't. On the other hand, if the production base surface becomes too dark, it may be dangerous for the worker. However, by using a cover, work can be done safely regardless of changes in the weather, and the appropriate brightness can be maintained so that the diagrams can be seen clearly.

Furthermore, by using a Fresnel lens as at least one of the plurality of lenses of the projection device, the amount of projected light increases, the production base surface is bright (but a clear diagram is projected, and work safety is improved). In addition to improving performance, work can be done quickly.

However, in the embedded object display device of this embodiment, rails are installed on both sides of the row of manufacturing bases, and a running frame in which both ends of the horizontal beam are supported by pillars with wheels is used. When used in a factory with a canopy, it may be possible to use a running frame that runs on rails installed above, or to support the rail from a wall or ceiling and run along this. In such cases, the horizontal beams may be supported by wheels without using supports.

Further, the horizontal beam is not limited to one supported at both ends, but may be supported on a cantilever.

(Effects of the Invention) As explained above, according to the method of the present invention, the type, position, dimensions, etc. of the implant are displayed as a diagram on the manufacturing base by the projection device, so that these can be displayed on the manufacturing base. This eliminates the need to draw while measuring, resulting in a significant reduction in labor and work time.

In addition, in the embedded object display device of the present invention, the projection device is supported by a traveling frame, and by using this device, concrete plates can be manufactured efficiently by the above method, and manufacturing costs can be reduced. Become.

If the embedded display device has a cover means, the surface of the manufacturing base can be maintained at an appropriate brightness, and a clear diagram can be projected regardless of the weather.

When at least one of the plurality of lenses of the projection device is a Fresnel lens, a bright but clear diagram is projected, improving work efficiency.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram showing one embodiment of the manufacturing method of the present invention. FIG. 2 is a schematic front view showing an implant display device according to an embodiment of the present invention, and FIG. 3 is a schematic side view of the same implant display device. Explanation of symbols 1...Light transparent sheet 2...Projector 3...Light source lamp 4...Fresnel lens 7...Concrete plate Production base 8...
・Embedded object 9...Formwork 10...Uncured concrete 12...
・Traveling frame 13... Support column 14... Horizontal beam 15... Wheel 16... Rail 18... Lifting guide frame 19-... ... Lifting frame 20 ... - Cart 23 ... Cover means patent applicant Nippon Kaiser Co., Ltd.

Claims (5)

[Claims] (1) The first step is to draw a miniature representation of the object to be embedded in the concrete plate on a light-transmissive sheet, and a projection device having a light source and a plurality of lenses is used to create A second step of enlarging and projecting the drawing drawn on the light-transmissive sheet to match the actual dimensions of the concrete plate, and fixing the embedded object according to the projected image;
A method for manufacturing a concrete plate, comprising a third step of pouring a predetermined amount of concrete into a fixed formwork. (2) The production base has a traveling device, and after completing the step of fixing the embedded object according to the projected image, the production base is run and moved to place concrete at another location. A method for manufacturing a concrete plate according to claim 1, characterized in that: (3) It has a horizontal beam that can be positioned on a manufacturing base made of a plurality of concrete plates installed almost horizontally and lined up in a row, and runs on a rail installed along the row of said manufacturing base. and a projection device that is supported by a horizontal beam of the traveling frame, is equipped with a light source and a plurality of lenses, and enlarges and projects an image drawn on a light-transmissive sheet onto the production base. Features: Embedded object display device on concrete plate. (4) The embedded concrete plate according to claim 3, further comprising a cover means attached to the traveling frame and substantially covering the projection device and the production base on which the image is projected. Display device. (5) The concrete plate embedded object display device according to claim 3 or 4, wherein at least one lens among the plurality of lenses included in the projection device is a Fresnel lens.