JPS649168B2 - - Google Patents

Description

Detailed Description of the Invention -Technical Field of the Invention- This invention relates to the structure of a formwork for forming concrete blocks, and aims to provide a formwork particularly suitable for forming large U-shaped groove blocks. It is something to do.

- Conventional technology and problems - U-shaped groove blocks are used in various sizes with different heights and widths, and small blocks are
Special molds are used to mold each block with different dimensions. However, when the block becomes large,
Since the cost of formwork is high and small blocks are not manufactured in large quantities, a formwork is required that allows blocks of various sizes to be formed using a single formwork. This type of dimensionally variable formwork is divided into a side forming frame and a bottom forming frame, and by replacing the bottom forming frame, it is possible to mold blocks of equal height and different width dimensions. A molded formwork is provided. However, a formwork in which both height and width are variable is not generally known. This is because the wall thickness of the U-shaped groove block needs to be changed according to its height, and if it were to be possible to change the height and wall thickness along with the width, the structure of the formwork would become extremely complicated. .

Furthermore, in conventional formworks with variable width dimensions, the end plate is also divided vertically into three parts, and the central member is replaced depending on the width dimension of the block to be molded. However, with this structure, it is necessary to replace the bottom molding frame of the mold body and also replace the central member of the end plate each time the dimensions of the block to be molded change, making the work complicated.

Furthermore, the conventional formwork for molding U-shaped groove blocks has a structure in which it is opened and closed by moving the end plate in parallel, or by pivoting the bottom of the end plate to the base and rotating it around a horizontal axis. During molding, it is necessary to lift the molded product to a height that exceeds the end plate, but if this structure is applied to a large formwork, the lifting height of the molded product during demolding becomes large, and the ceiling of the building is raised. There is a problem that demolding cannot be done due to the height. Of course, if the bottom of the end plate is pivoted to the base to open and close, it is possible to remove the mold with a small lifting height by opening the end plate until it becomes horizontal, but it is possible to remove the mold with a small lifting height by rotating the large end plate up and down. Therefore, there is a problem in that a great deal of effort is required to open and close the end plate, and there is also a risk of an accident due to the end plate falling down.

-Object of the invention- This invention was made to solve the above problems, and firstly, the width of the block to be molded,
The second object is to provide a formwork with a simple structure that allows the height and wall thickness to be changed.The second object is to provide a formwork that allows easy disassembly and assembly of the formwork when changing the dimensions of the block. To provide a formwork having a structure in which opening and closing operations of the frame are easy and safe, and even large blocks can be demolded with a small lifting height.

-Structure of the Invention- To explain using the reference numerals of the illustrated embodiments, the U-shaped groove block molding mold of the present invention is configured such that the mold can be divided into a side molding frame 3 and a bottom molding frame 4. A bottom end plate 6 is attached to the bottom forming frame 4 so as to be openable and closable, and a side end plate 5 that opens and closes around a vertical axis 22 is provided on the side forming frame 3. It is characterized in that the plate 7 is provided movably in the direction toward and away from the opposing inner plate 8.

-Operation- That is, by exchanging the bottom forming frame 4 fixed between the side forming frames 3a and 3b, the width of the block to be formed can be changed, and the outer plate 7 can be spaced close to and separated from the inner plate 8. The adjustment frame 16 can be interposed between the outer plate 7 and the inner plate 8 by providing the adjustment frame movable in the direction of the adjustment, and by changing the height and width of the adjustment frame, the height of the formed block can be adjusted. and wall thickness can be changed. Furthermore, since the bottom end plate 6 serving as the end plate of the central part is attached to the bottom forming frame 4, when the bottom forming frame 4 is replaced, the width of the end plate can be changed at the same time, and the setup when changing the dimensions of the block can be done in a short time. Furthermore, when opening and closing the mold, the side end plate 5, which is long in the height direction, is separated from the bottom end plate 6 and opened and closed around the vertical shaft 22, so even if the end plate is heavy, opening and closing operations are easy, and the side end plate 5 can be moved 90 degrees. By opening the molded product 30 with a small lift height, the molded product 30 can be demolded (see FIG. 7).

-Example- The illustrated embodiment will be described below.

In Figure 1, 1 is the base of the formwork, 2a, 2b
is a rail fixed to base 1, generally shown as 3
a, 3b are side forming frames, 4 is a bottom forming frame, 5a,
5b is a side end plate, and 6 is a bottom end plate. here,
The subscripts a and b are added to distinguish between the left and right members, and the subscripts are omitted when there is no need to distinguish between the left and right members.

The side forming frame 3 has an outer plate 7 and an inner plate 8, respectively.
One inner plate 8a is fixed to the base 1 via a support frame 9, and the other inner plate 8a is fixed to the base 1 via a support frame 9.
b is fixed to a sliding frame 10 that slides on the rail 2b. The outer plates 7 are each fixed to a truck 12 provided with wheels 11, 11 that roll on the rails 2. 13 is a reinforcing plate for the outer plate;
4 is a reinforcing stay for the inner plate, 15 is a reinforcing stay 14
This is a long bracket installed at the upper end of the frame in the direction perpendicular to the plane of the drawing. An adjustment frame 16 is interposed between the outer plate 7 and the inner plate 8, and is clamped between the outer plate 7 and the inner plate 8 by bolts 17.

Brackets 19 are fixed to both sides of the bottom plate 18 of the bottom forming frame 4, and by fastening the brackets 19 and the brackets 15 of the side forming frames with bolts 20, the bottom forming frame 4 is attached to the side forming frames 3a, 3b
fixed between. 21 is a connecting portion between the side molding frame 3 and the bottom molding frame 4.

FIG. 2 shows a structure for attaching end plates at both ends of the formwork constructed as described above. The end board consists of side end boards 5, 5 and a bottom end board 6, the side end board 5 is pivotally connected to the reinforcing stay 14 by a vertical shaft 22, and the bottom end board 6 is an L-shaped end board fixed to the bottom board 18. The guide pins 24 are fixed to the base ends of guide pins 24 that are slidably fitted into the bracket 23. 25 is a stopper fixed to the tip of the guide pin 24; 26 is an opening/closing rod whose base end is rotatably engaged with the bottom end plate 6 and screwed into the bracket 23;
27 is a handle fixed to the opening/closing rod 26; 28;
is its hub.

Although not shown in the figure, the side end plate 5 and the side forming frame 3 may be fastened together using a bolt or a known clamping tool using a toggle mechanism, and each time during mold clamping. The mutual positioning of the members may be performed using known dowel pins or wedge members.

3 to 5 are plan views showing the opening and closing operations of the end plate, with FIG. 3 showing the mold clamped state, FIG. 4 the state in the middle of opening and closing, and FIG. 5 the mold opening state. After opening the side end plate 5 by 90 degrees around the vertical axis 22 from the mold clamping state shown in FIG. 3, the bottom end plate 6 is moved in parallel along the guide pin 24 to bring the mold into the open state shown in FIG.
The amount of movement of the bottom end plate 6 is limited by the gap S between the end 29 of the open side end plate, but the height of the bottom end plate 6 is low, and the clearance required for demolding is small. That's fine, so this shouldn't be a problem. The position of the bottom end plate 6 during mold clamping in FIG. 3 is determined by the end plate 6 coming into contact with the bottom plate 18 and the stopper 25 of the guide pin 24 coming into contact with the bracket 23.

In this mold-opened state, the side end plates 5 are completely opened, so that the block 30 is raised to a height where the bottom plate 31 of the molded block 30 exceeds the bottom end plate 6, as shown in FIG. The mold can be removed by lifting the mold and moving it directly toward the end plate. Therefore, the lifting height of the molded product during demolding can be reduced, which not only makes demolding easier, but also allows large blocks to be molded even in buildings with low ceilings.

FIG. 6 shows another mounting structure for the bottom end plate 6, in which the bottom end plate 6 is opened and closed by utilizing the elastic deflection of the plate material. In the figure, 32 and 33 are reinforcing plates for the bottom plate 18 and the bottom end plate 6, and the bracket 23 is fixed to the reinforcing plate 32. In this embodiment, the bottom end plate 6 and the bottom plate 18 of the bottom forming frame are integrally connected by a connecting portion 34, and the handle 27
When the bottom end plate 6 is pulled or pushed by rotating the bottom end plate 6, the bottom end plate 6 is opened and closed due to elastic deflection of the plate material of the connecting portion 34. Further, the handle 27 is attached so that the bottom end plate 6 is in the closed position when the hub 28 comes into contact with the bracket 23.

-Effects of the Invention- As explained above, according to the present invention, a U with a simple structure can mold blocks with different widths, heights, and wall thicknesses by exchanging the bottom molding frame and the adjustment frame.
A formwork for forming a groove block can be obtained, and since the bottom end plate, which is the middle part of the end plate, is attached to the bottom forming frame, it is easy to disassemble the formwork when changing the dimensions of the block.
It is easy to assemble, and the side end plates are opened and closed by rotating around the vertical axis, so opening and closing the end plates does not require any effort and the work is safe, and even large blocks can be easily opened and closed with a small lift. A formwork that can be demolded can be obtained.

[Brief explanation of the drawing]

The figures show an embodiment of the formwork according to the present invention. Fig. 1 is a cross-sectional view of the formwork, Fig. 2 is a perspective view showing the mounting structure of the end plate, and Figs. 3 to 5 are the end plate mounting structure. FIG. 6 is a plan view showing the opening/closing operation, FIG. 6 is a side view showing another embodiment of the mounting structure for the bottom end plate, and FIG. 7 is a perspective view showing the demolding operation of the molded product. In the figure, 1 is the base, 2 is the rail, 3 is the side forming frame, 4 is the bottom forming frame, 5 is the side end plate, 6 is the bottom end plate, 7 is the outer plate of the side forming frame, and 8 is the inside side. Board, 9
10 is a support frame, 10 is a sliding frame, 11 is a wheel, 12 is a trolley, 16 is an adjustment frame, 21 is a connecting part of a forming frame, 22
23 is a bracket, 24 is a guide pin, 25 is a stopper, 26 is an opening/closing lever, 27 is a handle, and 34 is a connecting portion between the bottom end plate and the bottom forming frame.

Claims (1)

[Claims] 1 The formwork is configured to be able to be divided into a side forming frame and a bottom forming frame, and the bottom end plate is attached to the bottom forming frame so as to be openable and closable, and the side forming frame has a side part that can be opened and closed around a vertical axis. A form frame for forming a U-shaped groove block, wherein an end plate is provided, and an outer plate of a side forming frame is movable in a direction toward and away from an opposing inner plate.