JPH11245210A - Molding form for curved block - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a form which is capable of molding various blocks with different bend angles without any additional forms and is of a simple structure and enables an operation to change the bend angle to be performed easily, with regard, to the form for molding a concrete block to be used in the bent part of a U-ditch, a side ditch, a culvert, a retainer wall or the like. SOLUTION: This molding form for a curved block is equipped with an arc part 1a of a length corresponding to a maximum moldable bend angle, a guide part 1c which extends in an identical arc form from one of the ends of the arc part 1a, and a short arc-shaped partitioning form 3 to be inserted into the arc part 1a or the guide part 1c. Further, the short arc-shaped partitioning form 3 has a partition 9 of the same shape as the cross section of a cavity 7 in the arc part 1a, a contact member (a guide shoe or a guide roller) which freely slides or rolls into contact with an inner and an outer arc member each of the arc part 1a and the guide part 1c, positioned on the back side of the partition 8 to hold the face of the partition 8 in the radial direction of the arc part 1a, and a clamping means 11 which fixes the partition 8 at a desired position on the arc part 1a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete block forming mold, and more particularly to a curved block used as a bending portion when constructing a U-shaped groove, a side groove, a culvert, a retaining wall, and the like. It is about a formwork.

[0002]

2. Description of the Related Art Structures such as U-shaped grooves, gutters, culverts, and retaining walls are formed by connecting blocks of a predetermined length. The straight part of the structure can be easily constructed by connecting the linear blocks, but the part where the structure refracts is
Since the position and angle of refraction differ from one site to another, blocks for constructing each refraction unit must be individually manufactured for each refraction unit.

A conventional method of forming a groove block or a culvert block used for a bending portion is to insert an oblique partition plate 22 into a cavity 21 of a formwork 20 for forming a linear block as shown in FIG. By forming a block having a shape in which one end of the block is cut off diagonally, and connecting the parts having the shape cut off diagonally as shown in FIG. 5, a groove or culvert bent at a desired angle is constructed. Things. In this case, the position of the bending portion is
The angle of refraction can be adjusted by adjusting the position of the partition plate 22 at 0, and the refraction angle is adjusted by the inclination angle of the partition plate 22. Assuming that the inclination angle is θ, the partition plate 22 has a cross-sectional width of the cavity 21 of 1 / c.
Since a value multiplied by osθ must be used, the partition plate 22 corresponding to the refraction angle of the structure must be prepared as a pair of right-handed and left-handed ones. That is, in the conventional structure, a mold that forms a linear block can be used, but a pair of partition plates must be prepared for each refraction angle, and a structure having various refraction angles is required. Since an object is constructed, there is a problem that the number of partition plates that need to be prepared becomes enormous.

[0004] On the other hand, in the case of a retaining wall, a refraction portion may be formed by molding and butting a block whose side edge is obliquely cut off in the same manner as a groove or a culvert. In this case, since the resistance to the earth pressure is significantly reduced at the bending portion, an integral block bent at a desired angle is often formed. Conventional retaining wall forms for forming such blocks allow the inner side plate and the outer side plate to be bent at an arbitrary angle with a hinge structure, respectively, so that the deflection in the width and length directions of the cavity when bent is performed. A method is adopted in which the edge plate and the side plate are adjusted by moving them, and fixed on a surface plate to cast concrete. According to such a formwork, a concrete block having an arbitrary angle of refraction can be integrally formed with one formwork, but the structure of the formwork becomes very complicated. A problem arises in that the work of setting the angle requires a great deal of labor and time.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the conventional means which occur when a block used in a bending portion of a water channel or a retaining wall is formed. It is an object of the present invention to provide a concrete block forming mold capable of forming various blocks having different refraction angles with a frame, having a simple structure of the mold and easily changing the refraction angle.

[0006]

According to the present invention, there is provided a mold for forming a curved block, comprising an arc portion 1a having a length corresponding to the maximum refraction angle which can be formed, and a guide portion extending from one end of the arc portion in the same arc shape. 1c and a short arc-shaped partition frame 3 inserted into the arc portion or the guide portion. The short arc-shaped partition frame 3 includes a partition plate 8 having the same shape as a cross section of a cavity (a cavity for forming a block) 7 of the arc portion, and a circular arc portion 1 a or a guide portion located behind the partition plate 8. A contact member (guide shoe or guide roller) 9 for slidingly or rollingly contacting the inner and outer arc members of 1c to hold the surface of the partition plate 8 in the radial direction of the arc portion 1a; Fastening means 11 for fixing arc portion 1a at a desired position
And

In the above invention, the partition plate 8 and the inner and outer abutting members 9, 9 are held in a fixed positional relationship by the frame 12 of the partition frame 3, and the arc portion 1a to the guide portion 1c abut. Since the guide surfaces contacting the members 9 and 9 are bent at the same interval and the same curvature, even if the partition plate 8 is moved to any position of the arc portion 1a, the surface of the partition plate faces in the radial direction of the arc portion. The shape of the end face of the molded block is the same as the shape of the end face of the linear block. Therefore, if the partition plate 8 is moved to a position where a desired refraction angle is obtained and fixed by the fastening means 11 to form a block, the blocks having the desired angle refraction are connected by connecting the linear blocks across the block. Can be built. Arc part 1a
It is preferable to provide a linear portion 1b of an appropriate length at one end, and the position of the bending portion can be adjusted by adjusting the position of the edge plate 2 inserted into the linear portion 1b. That is, according to the mold having the above structure, the refraction position and the refraction angle of the block used in the refraction portion are provided on the linear portion 1b of the mold, and the fore-edge plate 2
By adjusting the position of the partition plate 8 provided in the circular arc portion, the adjustment can be made freely, and all the blocks having different positions and angles from the refraction portion can be formed by one mold.

The position and angle of the bending portion can be adjusted only by moving the fore-edge plate 2 and the partition plate 8 in the cavity of the mold body 1 and fastening them by the fastening means 11. Is very easy to change.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 schematically shows an embodiment of a mold according to the present invention, and shows an example of a mold for forming a U-shaped groove.
As shown in the plan view of FIG. 2, the formwork includes a formwork body 1, a fore-edge plate 2, and a partition frame 3. The formwork body 1 has a bottom plate 4, an openable and closable outer side plate 5 and an inner side plate 6, and The bottom plate 4 and the inner and outer side plates 5 and 6 form an inverted U-shaped cavity (molding space) 7 shown in FIG. The mold body 1 has an arc portion 1a, a straight portion 1b extending from one end thereof, and a guide portion 1c extending in the same arc shape from the other end. The circumferential length of the guide portion 1c is a length corresponding to the distance between the partition plate 8 of the partition frame 3 and the contact member (guide roller) 9.
In the embodiment shown in the drawings, the arc portion 1a and the guide portion 1c have the same structure, but the guide portion 1c may be formed only of a part of the partition frame where the guide roller 9 contacts. A fastening bracket 11 further extends in the same arc shape to the guide portion 1c.

FIG. 1 is a schematic perspective view of the partition frame 3.
The partition frame 3 includes a frame 12 having an appropriate structure that can be inserted into the arc portion of the cavity 7, and a partition plate 8 having the same cross-sectional shape as the cavity 7 shown in FIG. 3 is fixed to one end of the frame. A groove (not shown) for fitting a packing for preventing concrete from leaking is provided in a portion of the peripheral portion of the partition plate 8 which contacts the bottom plate 4 and the side plates 5 and 6. Four guide rollers 9 are provided on the frame 12 so as to be in contact with the upper and lower sides of the inner side plate 6 and the outer side plate 5 at a predetermined distance from the partition plate 8. Further, a screw bracket 13 extending along the fastening bracket 11 of the mold body is fixed to the frame 12, and a bolt insertion hole 15 in which a nut 14 is welded to the tip of the screw bracket 13 is provided. On the other hand, the fastening bracket 11 of the mold body is provided with a long hole 16 for inserting a bolt which is elongated in an arc direction.

The structure of the bottom plate 4 of the form body, the inner and outer side plates 5,
Various structures have been conventionally used for the opening / closing and fastening structure 6 and the structure of the fore-edge plate 2, and these may be appropriately used, and thus will not be described in detail here.

In the above structure, the fore-edge plate 2 is fixed to the mold body 1 in accordance with the position of the required bending portion, and the partition frame 3 is moved within the arc portion of the cavity 7 in accordance with the required bending angle. If the bolt inserted in the long hole 16 of the fastening bracket 11 is screwed into the nut 14 of the screw bracket 13 and fastened, the position of the partition plate 8 is fixed, so that concrete can be poured into the cavity 7 in that state. For example, a concrete block having an arc-shaped bent portion at a desired angle at a desired position can be formed.

In the above embodiment, the contact member (guide roller) 9 is brought into contact with the inner wall surface of the side plate, but a guide rail concentric with the side plate and the like is provided separately from the side plate and the like. A fastening device having a structure for clamping the upper end flange portion of the rail or the side plate can be used as fastening means for fixing the position of the partition frame. Further, the above embodiment relates to a mold for forming a groove block, but a mold for forming a block used as a bending portion of a structure constructed by sequentially connecting a number of blocks such as culverts and retaining walls. You can get a frame.

[Brief description of the drawings]

FIG. 1 is a perspective view of a mold body and a partition plate.

FIG. 2 is a plan view of a mold body and a partition plate.

FIG. 3 is a sectional view of a portion A in FIG. 2;

FIG. 4 is a perspective view showing a conventional mold.

FIG. 5 is a plan view showing a bending portion of a U-shaped groove.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Form body 2 Edge plate 3 Partition plate 5 Outer side plate 6 Inner side plate 7 Cavity 8 Partition plate 9 Guide roller 11 Fastening bracket 12 Frame 1a Arc part 1b Linear part 1c Guide part

Claims (1)

[Claims] 1. An arc portion (1a) having a length corresponding to the maximum refraction angle that can be molded, a guide portion (1c) extending in the same arc shape from one end of the arc portion, and inserted into the arc portion or the guide portion. A short arc-shaped partition frame (3), which is formed by a partition plate (8) having the same shape as the cross section of the cavity (7) in the arc portion, and a partition plate (8). It is located behind the plate (8) and slidably or rollably abuts the arc members (1a) or the inner and outer arc members of the guide portion (1c) so that the surface of the partition plate (8) is arced ( The contact member (9) for holding in the radial direction of 1a) and the partition plate
Fastening means (11) for fixing (8) at a desired position of the arc portion (1a)
And a mold block for forming a curve block.