JPH0354888Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a formwork particularly suitable for producing, for example, concrete strength test specimens. [Prior Art] Conventionally, forms for concrete specimens are usually made of cast iron.

However, those made of cast iron are heavy and inconvenient to handle, and there is a risk of lower back pain during work or injury if dropped.

Therefore, as it is made of thin metal plate such as tin,
Lightweight devices are also used in some cases, but those made of metal plates are uneconomical because they cannot be used repeatedly.

[Problem that the invention attempts to solve]

For this reason, those made of cast iron have become the mainstream.

This is divided into a bottom part and an upper cylindrical part, and further, the cylindrical part is divided into two vertically, and the whole is divided into three parts.

The lugs for inserting the tightening bolts that connect these parts are integrally formed with each part.
This lug-type fastening part must be tightened in at least 6 places, 2 places on the left and right between the bottom and the cylindrical part, and 2 places on the top and bottom between the two divided upper cylindrical parts. First, considerable skill is required to align each part evenly.

In addition, due to the constant and repeated tightening work, the metal fatigue of the lugs is significant, and since the lugs are integrated, damage to a single lugs can easily cause damage to the lugs.
It has the disadvantage of having a surprisingly short lifespan, which means that the entire product must be discarded.

[Means for solving problems]

This invention attempts to solve the above problem by making the formwork easily disassembled. A fitting portion is formed by providing an inclined surface toward the direction and a recess following the inclined surface on the bottom surface of the receiving groove, and the lower end of the separation body forming the side wall of the formwork is provided with the inclined surface and the recess. By providing an engaging portion consisting of an inclined surface and a protrusion corresponding to the recess, and fitting the engaging portion into the fitting portion, the separator can be erected on a base and the outside of the separator can be clamped. This is characterized in that the separator is fixed by tightening the separator.

[Effect]

Damage to the clamped part due to metal fatigue caused by repeated clamping can be resolved by replacing the clamp, and the life of the main body is significantly extended.

By fitting the engaging portion into the fitting portion, the separator can be easily and accurately attached to the base plate, and can also be easily removed.

〔Example〕

1 to 4 show an embodiment of the present invention for manufacturing a cylindrical concrete specimen.

Reference numeral 10 denotes a base body, which is made up of a base plate 11 having a circular bottom size and a semi-cylindrical side frame 12 integrally erected from the base plate 11.

The side frame 12 is located on one side of the center of the base plate 11,
Each side edge is provided with a semicircular groove 13 and a semicircular protrusion 14 in the vertical direction, and an outward flange 15 is provided at the upper end, and an outward projecting edge 16 is provided slightly below the upper end. has been done.

The upper surface of the base plate 11 has a downward edge 17 that points diametrically outward from both side edges of the side frame 12, and a downward edge 17 that is parallel to the downward edge 17 at a position slightly larger than the outer diameter of the side frame 12. , a locking edge 18 that is taller than the downward edge 17;
A receiving groove 19 connecting the lower end of the downward edge 17 and the lower end of the locking edge 18 is formed.

On the inner side of the receiving groove 19, a semicircular support portion 19a that protrudes from the lower end of the side frame 12 and has a radius equal to the inner diameter of the side frame 12 is provided to protrude upward.

The upper half of the locking edge 18 is an inclined surface 18a facing outward and upward at an angle of about 25°, and the lower half is also inclined outward and downward at an angle of about 45°. The surface 18b is formed.

The outer end of the receiving groove 19 is connected to the both inclined surfaces 18a, 1
8b, and has a semicircular recess 19b having a radius equal to the length of the inclined surface 18b, and this recess 19b and the inclined surface 18b form a fitting portion.

Reference numeral 20 denotes a separate body, and a bottom piece 22 facing the side is provided on both sides of the lower end of a semi-cylindrical body 21 having the same size and shape as the side frame 12;
22 are installed in a row.

The side edges of the semi-cylindrical body 21 are provided with the grooves 1, respectively.
3 and a convex line 22 and a concave line 23 corresponding to the convex line 14
is provided at the upper end and slightly below it, similar to the outward flange 15 and the outward flange 16,
An outwardly directed flange 25 and an outwardly directed flange 26 that can be continuous therewith are provided, respectively.

The bottom piece 22 has a shape and dimensions that allow it to fit properly into the receiving groove 19, and has an outwardly downwardly directed inclined surface that can fit properly into the inclined surface 18b and the recess 19b at its outer end. 22a and a semicircular arc-shaped protrusion 22b.

Note that the outer end of the bottom piece 22 that continues to the inner end of the inclined surface 22a is a vertical surface 22c.

The base body 10 and the separator 20 are preferably made of hard plastic, but are not necessarily limited to this.

30 is a clamp with two semicircular tightening rings 31,
31 are pivotally connected to each other by a pin 32, and the other ends are provided with perforated outward pieces 33, 33, and a bolt 35 with a wing nut 34 is inserted into one of the outward pieces 33.

The inner diameter of the tightening ring 31 is approximately equal to the outer diameter of the side frame 12 or the semi-cylindrical body 21, and the inner circumferential length thereof is slightly shorter than the outer circumferential length of the side frame 12 or the semi-cylindrical body 21.

The tightening ring 31 is preferably made of hard plastic, and if it has a concave cross section with the opening facing upward or downward, the tightness during tightening will be improved.

To assemble this formwork, the separator 20 is tilted slightly outward and upward, and the inclined surface 2 on the outer edge of the bottom piece 22 is
2a and the protrusion 22b are first fitted into the fitting part consisting of the inclined surface 18b and the recess 19b on the base plate 11, and then, with the separation body 20 vertical, the protrusion 23 and the recess 24 are fitted. After fitting into the concave line 13 and the convex line 14 of the side frame 12, the clamp 3
0 above the outwardly directed edges 16, 26 and tighten.

In this way, the separator 20 can be simply and accurately joined to the base 10 to form a mold having a molding space between it and the side frame 12.

After molding, the product can be taken out without rubbing by opening and removing the separator 20 using a reverse operation.

FIG. 5 and subsequent figures show other embodiments of the present invention for manufacturing prismatic concrete specimens.

The base plate 40 has no rectangular shape, and receiving grooves 41 and 42 are provided slightly inside each side of its upper surface.

A fitting portion consisting of an inclined surface 41a and a recess 41b similar to the inclined surface 18b and recess 19b is provided at the outer lower part of the receiving groove 41 at the end side.

This fitting part includes the inclined surface 2 at the lower end of the outer surface of the end piece 50 as a separator having a planar shape.
The end piece 50 is held vertically by properly fitting the engaging portion formed by the inclined surface 51 and the protrusion 52 similar to the protrusion 2a and the protrusion 22b.

Into the opening of the end piece 50, the side end portion of the side piece 60 whose lower end is fitted into the receiving groove 42 is fitted and overlapped.

A square frame-shaped clamp 7 in which two L-shaped rods 71 are pivotally attached to fitting grooves 53 and 61 provided at appropriate upper portions of an end piece 50 and a side piece 60 so as to be rotatable around a pin 72.
0 and by connecting the free ends of the L-shaped rods 71, 71 with the locking rod 73, the formwork can be easily and accurately assembled.

The end piece 50 and the side piece 60 may be provided with protrusions instead of the fitting grooves 53 and 61, and the inner surface of the clamp 70 may be provided with a fitting groove that can be fitted thereto.

[Effect of idea]

The formwork of the present invention can be assembled easily and accurately, and its disassembly is also easy.

When disassembling the formwork or taking out the product, the surface of the product is not rubbed, so the product is not damaged.
Also, the formwork will not wear out.

The clamp is separate from the main body, and the main body has no lugs for tightening, so there is no risk of the lugs being damaged during tightening.

[Brief explanation of the drawing]

Figure 1 is an exploded perspective view of one embodiment of the formwork of the present invention for manufacturing cylindrical concrete specimens;
The figure is a front view of the base, FIG. 3 is a plan view of the base, and FIG. 4 is a front view of the separation body.
FIG. 5 is a perspective view showing another embodiment of the present invention for producing a prismatic concrete specimen without the clamp, FIG. 6 is a perspective view of the base plate, and FIG.
FIG. 8 is a perspective view of the end piece, FIG. 8 is a perspective view of the side piece, and FIG. 9 is a perspective view of the clamp. 10...base, 11...pedestal, 12...side frame,
13... Concave strip, 14... Convex strip, 15... Outward flange, 16... Outward projecting edge, 17... Downward edge, 18
... Locking edge, 18a, 18b ... Inclined surface, 19 ...
...Receiving groove, 19a...Support part, 19b...Concave, 2
0...Separated body, 21...Semi-cylindrical body, 22...Bottom piece, 22a...Slanted surface, 22b...Protrusion, 22c
...Vertical surface, 23... Convex strip, 24... Concave strip, 25
...Outward flange, 26...Outward flange, 30...
Clamp, 31... Tightening ring, 32... Pin, 33
... Outward piece, 34 ... Wing nut, 35 ... Bolt, 40 ... Base plate, 41, 42 ... Receiving groove, 41a
... Sloped surface, 41b ... Concave, 50 ... End piece, 5
1... Inclined surface, 52... Projection, 53... Annular groove, 6
0... Side piece, 61... Ring groove, 70... Clamp,
71...L-shaped rod, 72...pin, 73...locking rod.

Claims (1)

[Scope of claim for utility model registration] (1) At the lower end of one side of the receiving groove provided on the top surface of the base plate,
A fitting part is formed by providing an inclined surface facing outward and downward, and by providing a recess that follows this inclined surface on the bottom surface of the receiving groove. By providing an engaging portion consisting of an inclined surface and a protrusion that correspond to the surface and the recess, and fitting the engaging portion to the fitting portion, the separator can be erected on the base and the outside of the separator can be A formwork for concrete specimens made by fixing the separator by tightening it with clamps. (2) The concrete according to claim 1 of the utility model registration claim, in which the base plate is integrated with the side frame, and the separator cooperates with the side frame to form a molding space. Formwork for specimen. (3) The formwork for a concrete specimen according to claim 2 of the utility model registration claim, in which the side frame and the separator have a semi-cylindrical shape. (4) Practical use in which the base plate is rectangular, separators are attached to opposite sides of the base plate, side pieces are arranged between the opposing separator manufacturing ends, and the separators and side pieces are tightened with clamps. A formwork for a concrete specimen as set forth in claim 1 of the patent registration claim. (5) For concrete specimens according to any one of claims 1 to 4 of the utility model registration claim, in which the clamps are pivoted at one end and tightened at the other ends with bolts. Formwork. (6) For concrete specimens according to any one of claims 1 to 4 of the utility model registration claim, in which the clamps are pivoted at one end and connected at the other end by a locking rod. Formwork. (7) The formwork for concrete specimens according to any one of claims 1 to 6 of the claims for utility model registration, in which the base plate and the separator are made of plastic.