JPH0716407Y2 - Formwork for patterned block molding - Google Patents

Description

[Detailed Description of the Invention] << Industrial field of application >> The present invention relates to a mold for molding a concrete block having a relief pattern on its surface, and more particularly to a fixing structure of a pattern sheet for forming the pattern. It is about.

<< Prior Art >> An embossed pattern on the surface of a block is usually formed by adding a synthetic resin pattern sheet having irregularities opposite to the pattern to a mold. FIG. 5 shows a frame having a conventional structure with a pattern sheet attached, and the pattern sheet 8 is adhered to an iron bottom plate 6. The peripheral edge 6a of the bottom plate 6 is normally bent up obliquely so that the peripheral edge of the block surface is chamfered, and the peripheral edge 8a of the pattern sheet 8 is bonded to this bent up portion.

<Problems to be solved by the invention> Synthetic resins tend to harden and shrink due to aging, but especially the pattern sheet 8 attached to the formwork promotes shrinkage due to concrete alkali or steam heat during curing. Then, when the mold is used for a while, the peripheral edge 8a of the pattern sheet comes off from the folded peripheral edge portion 6a of the bottom plate (see FIG. 6). Then, concrete flows into the gap 21 generated by the peeling and is hardened, and when the block is released from the mold, the peeling of this portion is promoted to shorten the life of the mold and to reduce the quality of the released product.

Further, the contracted pattern sheet 8 is difficult to be re-bonded by pulling the outer peripheral edge thereof, and cannot be repaired unless the contracted pattern sheet is peeled off and a new pattern sheet is bonded.

To attach the pattern sheet 8 to the bottom plate 6, as shown in FIG. 7, a wire net 22 is spot-welded to the bottom plate 6, and the bottom plate 6 and the template 23 are attached.
There is also known a method of pouring a molten resin between the pattern sheet 8 and the bottom plate 6 so that the pattern sheet 8 and the bottom plate 6 can be bonded to each other more firmly. However, even if this method is adopted, it is difficult to dispose the wire netting 22 even at the peripheral edge 8a of the pattern sheet, and therefore even with this structure, peeling of the peripheral edge 8a of the pattern sheet cannot be prevented.

An object of the present invention is to provide a pattern block molding formwork that can be used for a long period of time by preventing the separation phenomenon of the peripheral edge of the pattern sheet due to the contraction of the pattern sheet and the deterioration of the quality of the concrete block due to the phenomenon. I am trying.

<< Means for Solving the Problem >> A pattern-forming block forming frame according to the present invention is a synthetic resin pattern sheet 8 for forming an embossed pattern on a block surface, and a bottom plate for supporting the pattern sheet from the back surface. 6
And a bottom frame 4 surrounding the bottom plate. A pressing edge 9 is attached to an upper edge of the bottom frame 4 such that an inner peripheral edge portion thereof projects inside the bottom frame. And the bottom plate 6
And the pressing edge 9 are brought close to each other, and the peripheral edge 8a of the pattern sheet 8 is sandwiched between the inner peripheral edge of the pressing edge 9 and the peripheral edge 6a of the bottom plate.

<< Operation >> According to the above structure, the peripheral edge 8a of the pattern sheet 8 is sandwiched between the bottom plate 6 and the pressing edge 9 in the thickness direction thereof. Only the pressing edge 9 is displaced in the plane direction, and there is no gap between the pattern sheet 8 and the pressing edge 9.

<< Embodiment >> FIGS. 1 and 2 show a first embodiment of the present invention. FIG. 1 is a perspective view of a mold showing the side plate 11 shown in FIG. The figure is a cross-sectional view of the mold. In the figure, 1 is a base frame of the formwork, 2 is a girder material installed on the upper edge of the base frame 1, 3 is a push-up bolt provided in the girder material 2 in the vertical direction, 4 is a bolt nut 5 on the base frame 1. Is a bottom frame fixedly attached to the bottom frame 6, 6 is a bottom plate housed in the bottom frame so as to be vertically movable, and 7 is a support frame fixed to the back face of the bottom plate 6. ing. 8 is a urethane resin pattern sheet adhered to the bottom plate 6, 9 is a frame-shaped pressing edge fixed to the upper end of the bottom frame 4, 10 is a tapered surface formed on the inner peripheral edge of the pressing edge 9, and 11 is The side plate 11 is a side plate in which the lower edge of the inner surface is in contact with the end of the tapered surface 10, and the side plate 11 is swingably supported by a bracket 12 provided on the base frame 1. The tapered surface 10 of the pressing edge is for forming a chamfer on the outer periphery of the relief pattern.

The support frame 7 of the bottom plate 6 to which the pattern sheet 8 is attached is placed on the push-up bolt 3 with the bottom frame 4 removed, and then the bottom frame 4 is fitted and the bottom frame 4 is fixed by the bolt nut 5. Fastened to the base frame 1. Then, the push-up bolt 3 is screwed to move the bottom plate 6 upward so that the peripheral edge 8a of the pattern sheet is pressed against the inner peripheral edge of the pressing edge 9. When the peripheral edge 8a of the pattern sheet is clamped and fixed between the inner peripheral edge portion of the pressing edge 9 and the peripheral edge portion 6a of the bottom plate in this way, even if the pattern sheet 8 contracts, the peripheral edge 8a
Is always clamped without being disengaged from the pressing edge 9, and there is no room for forming a gap in the peripheral edge 8a of the pattern sheet.

FIG. 3 shows a second embodiment of the present invention, in which the bottom plate 6
Is fixed to the bottom frame 4, and the pressing edge 9 is fastened to the upper edge of the bottom frame 4 by the bolt nut 13. In this structure, after the pattern sheet 8 is adhered to the bottom plate 6, the pressing edge 9 is fastened to the upper edge of the bottom frame 4 by the bolt nuts 13, and the peripheral edge of the pattern sheet.
Hold 8a. When the thickness of the pattern sheet 8 is constant, this structure can simplify the structure of the mold.

FIG. 4 shows a third embodiment of the present invention, in which an inverse taper surface 14 is formed on the bottom portion of the bottom plate 6 and a wedge member 15 which abuts against the inverse taper surface is provided. The wedge member 15 is provided so as to be able to move forward and backward with a screw 17 on a support plate 16 which is horizontally mounted on the bottom frame 4, and the bottom plate 6 to which the pattern sheet 8 is adhered is accommodated in the bottom frame 4 and the wedge frame 15 is placed on the bottom frame 4. After the pressing edge 9 is fixed to the edge by the bolt nut 13, the screw 17 is rotated to advance the wedge material 15 to sandwich the peripheral edge 8a of the pattern sheet 8 between the bottom plate 6 and the pressing edge 9. As the structure for sandwiching the peripheral edge 8a of the pattern sheet, various structures can be adopted.

<Effect of the Invention> As described above, the formwork of the present invention holds the peripheral edge of the pattern sheet between the inner peripheral edge of the pressing edge and the peripheral edge of the bottom plate. Even if the sheet shrinks, no gap is generated in the peripheral portion of the pattern sheet. Therefore, the quality of the product is not deteriorated due to the generation of the gap, and the repair of the mold by peeling the pattern sheet is not necessary.
Also, because it is easy to attach the pattern sheet to the form,
By exchanging only the pattern sheet, blocks with different patterns can be manufactured one after another with the same form, and it is also possible to re-attach the pattern sheet that has been peeled off, making it possible to economically manufacture blocks of various patterns There is an effect.

[Brief description of drawings]

1 and 2 show a first embodiment of the present invention, in which FIG. 1 is a perspective view of a mold with side plates omitted, and FIG.
The figure is a cross-sectional view of the mold. FIG. 3 is a sectional view of the essential parts showing the second embodiment, and FIG. 4 is a sectional view of the essential parts showing the third embodiment. FIG. 5 is a cross-sectional view of a main part showing a conventional structure, FIG. 6 is an enlarged view showing a peeled state of a pattern sheet, and FIG. 7 is a cross-sectional view showing another conventional structure. In the figure, 3: Push-up bolts, 4: Bottom frame 6: Bottom plate, 7: Support plate for bottom plate 8: Pattern sheet, 8a: Perimeter of pattern sheet 9: Holding edge, 10: Tapered surface 13: Bolt nut, 15: Wedge Material

Claims (1)

[Scope of utility model registration request] 1. A bottom plate (6) for a mold, comprising a synthetic resin pattern sheet (8) for forming a relief pattern on a block surface.
In the patterned block molding frame additionally provided above, a holding edge (9) having an inner peripheral edge portion projecting inward of the bottom frame (4) at the upper end of the bottom frame (4) surrounding the bottom plate (6). And a peripheral edge (6a) of the bottom plate sandwiching the peripheral edge (8a) of the pattern sheet between the inner edge of the pressing edge and the peripheral edge (6a) of the bottom plate.