JPS6212001B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a middle cylinder in a formwork for forming concrete blocks used for bank protection or wave dissipation.

In order to provide drainage holes for water drainage and wave dissipation in the concrete blocks for seawall and wave dissipation shown in Fig. 6, a middle cylinder is required within the formwork. Traditionally, the steel cylinders that have been widely used are very heavy, and because the ready-mixed concrete is poured on-site,
A crane is required to transport and handle the formwork, which is inconvenient, and if the draft angle of the middle cylinder is not taken into account when demolding, it will shrink when the concrete solidifies.
If the inner cylinder is compressed and cannot be removed from the mold, and the inner cylinder is peeled off from the concrete over the entire surface at the same time, a large peeling force is required that exceeds the degree of adhesion between the mutual contact surfaces between the inner cylinder and the concrete. As a result, the peeling operation is not easy, and the peeling operation causes fractures, cracks, and distortions in the concrete, resulting in defective concrete blocks and lower production yields.

In order to eliminate the drawbacks of conventional inner cylinders, the present invention molds the cylinder body from a material with high elasticity and rigidity, and makes cuts in the vertical direction so that it can be divided into a plurality of outer shells.
Each outer shell is equipped with an adjustment mechanism using a lever, and when demolding, a part of each outer shell is sequentially peeled off from the concrete, making demolding easier.
The purpose is to improve smoothness, reliability, ease of transportation and handling due to the weight reduction of the inner cylinder, and the production yield of concrete block products.

In the present invention, a cylinder 2 made of reinforced plastic can be freely divided into a plurality of outer shells 2a by cuts 2e, 2e provided in the vertical direction, and an inner shell is attached to each outer shell 2a via an intermediate bottom wall 2f. 2b is vertically provided, and the outer shell 2a is formed to be thinner in order from the flat wall portion 2c to the outer arcuate wall portion 2d, and the cuts 2e, 2e are formed between the flat wall portion 2c, the intermediate bottom wall 2f, and the inner shell 2b, respectively. The intermediate bottom wall 2 is cut diagonally with respect to the plane.
A V-shaped notch 2g that opens from the outer shell 2a to the inner shell 2b is formed in f, and an adjustment mechanism 3 is installed inside the flat wall portions 2c, 2c of each outer shell 2a,
The adjustment mechanism 3 includes one end 3 of each of the upper link 3a and the lower link 3b at the end edge 2h of one flat wall portion 2c.
c and 3d, and one ends 3i and 3j of an arm link 3g and a lower link 3h are pivotally supported on an edge 2i of the other flat wall portion 2c so as to be rotatable in the vertical direction, and one end edge 2h is The distance Y from the pivot point of the upper link 3a and lower link 3b to the pivot point of the vertical link 3m is the distance Z from the pivot point of the arm link 3g and lower link 3h to the other edge 2i to the pivot point of the vertical link 3m. A vertical link of 3 m is installed at the longer position, and the upper link 3
a and the other ends 3e and 3k of the arm link 3g, respectively.
to the upper end 3n of the vertical link 3m, and the lower link 3
The other ends 3f and 3l of b and 3h are vertical links 3m
They are rotatably supported on the lower ends 3p of the respective parts.

Embodiments of the present invention will be explained with reference to the drawings: 1
is a formwork consisting of a side wall 1a and a bottom wall 1b, where the bottom wall 1b
Holes 1c, 1c into which the cylindrical body 2 is fitted are bored. The cylindrical body 2 is an elliptical cylinder made of reinforced plastic with high elasticity and rigidity, and can be freely divided into a plurality of semi-elliptic cylindrical outer shells 2a by vertical cuts 2e, 2e. An inner shell 2b is vertically connected below each outer shell 2a via a horizontal intermediate bottom wall 2f. Outer arcuate wall portion 2
The wall thickness m of d and 2d is formed thin. Said cut 2
2e and 2e are cut obliquely with respect to the flat wall portion 2c of the outer shell 2a, the intermediate bottom wall 2f, and the inner shell 2b. In addition, the intermediate bottom wall 2f is provided with an outer shell 2a during demolding.
A V-shaped cut 2g is formed from the outer shell 2a toward the inner shell 2b to facilitate inward bending. Adjustment mechanisms 3, 3 are housed inside the respective outer shells 2a, 2a. As shown in FIG. 4, the adjustment mechanism 3 connects one ends 3c and 3d of the upper link 3a and the lower link 3b with bolts 4, respectively, above and below one edge 2h of the opening side ends 2h and 2i of the outer shell 2a. 5, and one ends 3i, 3j of the arm link 3g and lower link 3h are rotatably supported above and below the other edge 2i by bolts 6, 7. And the link 3a, the lower link 3b,
The arm link 3g and lower link 3h are made parallel to each other. Upper link 2a for one edge 2h
And the distance Y from the pivot point [bolts 4, 5] of the lower link 3b to the pivot point [bolts 8, 9] of the vertical link 3m is the pivot point of the arm link 3g and lower link 3h relative to the other edge 2i. 6,
7] to the shaft fulcrum [bolts 8, 9] for the vertical link 3m, at a position that is not longer than the distance Z, and Vertical link 3
the upper end 3n of m, and the lower link 3b and the lower link 3
Vertical link 3m to each other end 3f, 3l of h
Lower end 3p of bolts 8, 9 and nuts 10, 11
It is pivoted by.

The formwork 1 has rigidity due to a large number of ribs 1f fixed to the outer circumference 1d of the formwork 1 and the protrusion 1e to withstand the load of concrete during concrete pouring and hardening, and to prevent distortion. It has a honeycomb structure. and cylinder 2
In addition to the examples, the outer shell 2a, the intermediate bottom wall 2f, and the inner shell 2
b may be integrally molded, or may have a cylindrical or polygonal cylinder shape, and the adjustment mechanism 3 has a vertical link 3m as a center, an upper link 3a and a lower link 3b.
The diameter of the outer shell 2a may be reduced by radially disposing and supporting the inner side of the outer shell 2a.

Reference numerals 12 and 12 in the figure are hanging plates provided at symmetrical positions with respect to the side wall 1a of the formwork 1. One side 12a of the hanging plates 12 and 12 faces the cylinder 2, and the other side 12b , 12b are each fixed by screwing a nut 14 onto a bolt 13 inserted into the upper edge 1g of the side wall 1a, and a window hole 15 for fitting a hanging rod is bored in the center.

Since the present invention is configured as described above, the arm link 3g is rotated obliquely upward as shown in FIG. When the arm link 3g is fitted into the hole 1c of the bottom wall 1b and rotated downward, the vertical link 3m, the upper link 3a and the lower links 3b and 3h are interlocked and the respective bolts 8, 4, 9, 5, 6 are connected. ,7 revolves around,
As each link gradually becomes horizontal, the inner shell 2
b, the outer shell 2a is pushed outward and the short axis R widens, and the lower part of the middle cylinder 2 is airtightly fitted into the hole 1c.
In this state, fresh concrete is poured between the formwork 1 and the cylindrical body 2. As the concrete solidifies, the cylinder 2 is compressed, but the links forming the adjustment mechanism 3 hold the outer shell 2a. After the concrete solidifies, attach arm link 3g to bolt 6.
When the upper link 3m is rotated obliquely upward about the arm link 3g via the bolt 8, the vertical link 3m is lifted up, and the upper link 3a is rotated upward about the bolt 4, and along with this, the vertical link 3m is rotated upward about the bolt 4. Since the lower links 3b and 3h, which are pivotally supported at the lower end 3p of the link 3m via the bolt 9, also rotate upward around the bolts 5, 7, and 9,
The intervals between the bolts 4 and 6 and between the bolts 5 and 7 are pulled inwardly, and the flat wall portions 2c, 2c are also pulled together and are successively separated from the concrete. Furthermore, when the arm link 3g is rotated, the flat wall portion 2
The outer shell 2a, inner shell 2b, and intermediate wall 2f gradually curve inward from c along the outer arcuate wall 2d, and the outer surface of the outer shell 2a peels off from the inner wall surface of the drain hole of the solidified concrete block. It becomes possible to cut out the mold. After the die is removed, when the arm link 3g is rotated downward around the bolt 6, the bolt 8 also descends, so the vertical link 3m also descends, and along with this, the upper link 3
a, lower links 3b, 3h also bolts 4, 5, 7, 9
The inner shells 2b, 2 rotate around the center and become horizontal, and the inner shells 2b, 2
b, the diameter of the outer shell 2a returns to its original length.

According to the present invention, the cylindrical body can be divided into a plurality of outer shells, so when removing the cylindrical body from concrete, each divided outer shell can be separated without peeling the cylindrical body from the concrete all at once. All you have to do is go
Moreover, since the cuts that divide the cylinder are cut diagonally in the flat wall, the flat wall tends to start peeling off at the beginning of the peeling operation, and the cylinder 2 is made of reinforced plastic to improve its elasticity. The rigidity is maintained and the wall thickness is gradually reduced from the flat wall to the outer arcuate wall, and a notch is provided in the middle bottom wall, so the outer shell can easily curve inward from the flat wall to the outer arcuate wall. Since the formwork is sequentially peeled off from the concrete starting from one side edge, there is no need for the large amount of force required in the past to peel off the entire contact surface of the formwork against the concrete at the same time. Further, since the arm link that operates the adjustment mechanism uses a lever, the force required to operate the arm link, that is, to perform the peeling operation is reduced. Furthermore, since the outer shell is sequentially peeled off from the concrete, a good product can be obtained without causing fractures, cracks, or distortions in the concrete product.
No reduction in production yield.

In addition, since the cylindrical body is made of reinforced plastic, it has excellent stability after demolding, and the intermediate bottom wall and inner shell have a reinforcing effect against the outer shell, making it difficult for the cylindrical body itself to be distorted or deformed. Durable. In addition, compared to the past, the inner cylinder can be released from the mold extremely smoothly, making it extremely easy to remove the concrete from the formwork after pouring, eliminating the need to provide a draft angle on the inner cylinder itself, and adjusting the adjustment mechanism. It is easy to operate, saves labor in producing concrete blocks, and increases production efficiency.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a perspective view of the formwork of the invention, Fig. 2 is an enlarged sectional view taken along line AA of Fig. Figure 4 is the third
Fig. 5 is a sectional view showing the operating state of the middle cylinder, and Fig. 6 is a perspective view of the concrete block after die cutting. Code: 1...Formwork, 1a...Side wall, 1b...Bottom wall, 1
c...hole, 1d...outer periphery, 1e...projection, 1f...rib, 1g...upper edge, 2...cylindrical body, 2a...outer shell, 2b...
Inner shell, 2c...Flat wall part, 2d...Outer arcuate wall part, 2
e...slit, 2f...middle bottom wall, 2g...notch,
2h, 2i...edge, 3...adjustment mechanism, 3a...upper link, 3b...lower link, 3c, 3d...one end, 3e,
3f...other end, 3g...arm link, 3h...lower link, 3i, 3j...one end, 3k, 3l...other end, 3m
...Vertical link, 3n...upper end, 3p...lower end, 4,5...
Bolt, 6, 7...Bolt, 8, 9...Bolt, 1
0, 11... Nut, 12... Hanging plate, 12a... One side, 12b... Other side, 13... Bolt, 14... Nut, 15... Window hole, R... Minor diameter, l... Wall thickness (of flat wall portion 2c) , m...Wall thickness (2d), Y ...distance, Z ...distance, A...concrete block, B...drain hole,
Ha...hanging.

Claims (1)

[Claims] 1 A cylinder 2 made of reinforced plastic is formed into a plurality of outer shells 2a by cuts 2e, 2e provided in the vertical direction.
Each outer shell 2a has an intermediate bottom wall 2f.
The inner shell 2b is vertically disposed through the inner shell 2b, and the outer shell 2a is sequentially thinned from the flat wall portion 2c to the outer arcuate wall portion 2d, and the cuts 2e and 2e are formed in the flat wall portion 2.
A V-shaped notch 2g is cut obliquely to the respective planes of the middle bottom wall 2f and the inner shell 2b, and the middle bottom wall 2f has a V-shaped cut 2g that opens from the outer shell 2a to the inner shell 2b. , and each outer shell 2a has a flat wall portion 2.
An adjustment mechanism 3 is installed inside the upper link 3a and the lower link 3b at the edge 2h of one of the flat wall portions 2c.
, and one end 3i of each of the arm link 3g and lower link 3h is attached to the edge 2i of the other flat wall portion 2c,
3j are each pivotably supported in a vertically rotatable manner, and furthermore, the distance Y from the pivot point of the upper link 3a and lower link 3b with respect to one edge 2h to the pivot point with respect to the vertical link 3m is relative to the other edge 2i. The vertical link 3m is arranged at a position longer than the distance Z from the axis support of the arm link 3g and the lower link 3h to the axis support of the vertical link 3m, and the other ends 3e and 3k of the upper link 3a and the arm link 3g are connected to each other. The upper end 3n of the vertical link 3m, and the other ends 3f and 3l of the lower links 3b and 3h, respectively, are connected to the lower end 3p of the vertical link 3m.
and a middle cylinder in a formwork for forming a concrete block, each of which is rotatably supported.