JPH034485Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a reinforced concrete block molded structure.

Conventionally, reinforced concrete blocks are made by assembling formwork into a cylindrical shape, attaching it to a centrifugal forming machine,
By rotating the same formwork with the same centrifugal force forming machine and feeding concrete into the same formwork, dozens of the same blocks are formed at the same time. This is done by attaching a core formed in the shape of a cylindrical truncated cone to the mold, but since the core is almost cylindrical, it is difficult to remove the core from the mold. ,
There was an inconvenience that if the mold was removed forcibly, the block would be damaged.

In this invention, one end of the core is attached to the support plate of the formwork to form the cavity of the reinforced concrete block, and the peripheral surface is formed into a tapered shape with a draft slope of 5% or more. In the reinforced concrete block molded structure, inside the core,
In addition to providing an adjustment support, a main adjustment bolt protruding inward from the outside of the support plate is screwed onto the adjustment support to allow the core to be installed freely, and by rotation of the bolt. This invention provides a reinforced concrete block molding structure characterized in that the depth of the core is adjustable.

The embodiment of the present invention will be explained in detail based on the drawings.
A shows a formwork for molding reinforced concrete blocks, and the formwork A consists of upper and lower ring-shaped supports 1 and 2, side plates 3, and a core body 4. Side plate 3 and core body 4 between 2
and are alternately erected and supported so that they can be assembled into a hollow cylindrical body, and the formwork A is suspended horizontally on a non-vibration centrifugal forming machine (not shown), and a predetermined concrete is poured into the formwork A. At the same time, the same formwork is rotated by the same centrifugal molding machine, thereby press-fitting the concrete between each side plate 3 and molding a predetermined number of reinforced concrete blocks B at the same time.

The upper and lower ring-shaped supports 1 and 2 are both ring-shaped plates that maintain a predetermined width, and the inner surfaces of both supports 1 and 2 are provided with upper and lower protrusions 1 that are maintained at a predetermined interval. -1, 2-1 are protruded radially,
The same projections 1-1 and 2-1 are configured to form upper and lower concave portions B-1 and 2 of the reinforced concrete block B formed between both supports 1 and 2, and the upper ring-shaped support 1 Upper flange 1-2 on the outer peripheral edge
is provided vertically, and a lower flange 2-2 is provided protruding from the outer peripheral edge of the ring-shaped support 2.

The side plate 3 has left and right side plate parts 3-1, 1 formed by bending a vertically long rectangular plate body into a substantially V-shape, and furthermore, the outer ends of the left and right side plate parts 3-1, 1 are respectively bent inward. It is folded back and left and right folded parts 3-2, 2 are provided,
Left side plate part 3-1 and side plate part 3- of each adjacent side plate 3
1, the left and right side surfaces of the block B are configured to be parallel flat surfaces with a predetermined thickness.

The core body 4 consists of a core 5 and a support plate 6 that integrally supports the outer end of the core 5, and the support plate 6 is formed into a vertically elongated rectangular plate with approximately the same width as the wall thickness of the block B. A truncated cone-shaped central core 5-1 is formed at the center of the inner surface of the support plate 6, and two upper and lower elliptical truncated-cone shaped central cores are provided on the upper and lower sides of the central core 5-1. 5-2, 2, 2, 2 are each attached via a depth adjustment device 7 so that the depth can be adjusted freely.

That is, each core 5-1, 2 has its outer peripheral end fitted into a fitting groove 8 provided on the inner surface of the support plate 6, and the depth adjustment device 7 is used to adjust the fitting depth of the outer peripheral end. The adjustment device 7 has a main adjustment bolt 9 inserted into the core 5 via the support plate 6, and is screwed into an adjustment support 10 fixedly installed inside the core 5. , furthermore, from the upper and lower positions of the bolt 9, the support plate 6
The upper and lower auxiliary adjustment bolts 11, 11 are inserted in a horizontally penetrating state.
The tips of the bolts 11, 11 are brought into contact with the outer circumferential surface of the adjustment support 10, and the depth of the core can be adjusted by adjusting the threading of each bolt 9, 11, 11. It also performs demolding work from the block.

Moreover, the core 5 has a circumferential surface formed into a tapered surface, and the draft angle, that is, the radius D/2 of the core 5 at the inner surface of the support plate 6,
The difference from the radius d/2 of the tip of the core 5 is divided by the length L from the tip of the core 5 to the inner surface of the support plate 6, and the value multiplied by 100 is preferably 5% or more.

Therefore, since the draft angle of the core 5 is 5%, if the core 5 is slightly slid outward via the depth adjustment device 7, it will not adhere to the outer peripheral surface of the core 5. The core 5 can be easily demolded from the reinforced concrete block B formed in the same condition, and at the same time, a hollow part B for inserting reinforcing reinforcing bars is formed in the block B.
-3 is formed in a relative shape to the core 5.

Reference numeral 12 denotes a reference pin, which is provided to protrude laterally outward from the adjustment support 10 and penetrates into the support plate 6, so that the tip of the reference pin 12 meets the outer surface of the support plate 6. When the core 5 is flush, it can be seen that the core 5 has been adjusted to a predetermined position.

13 is a thrust bearing, and 14 is a support cylinder.

Reference numeral 15 denotes a positioning member, and the member 15 is provided at the upper and lower positions of the left and right folded portions 3-2 and 2 of each side plate 3 on the inner surface of the upper and lower ring-shaped supports 1 and 2, respectively.
The upper and lower parts of each side plate are brought into contact with each other by the same member 15, and each member 15 is provided with a supporting protrusion 15-1 protruding in the direction of the support plate 6, and the protruding piece 15-1 is connected to the support plate 6. By fitting into the fitting recesses 16 provided at the upper and lower parts of the left and right sides of 6, the protruding piece 15-1
The support plate 6 is configured to be supported through the support plate 6.

Reference numeral 17 denotes a side plate support member, and the support member 17 is configured to fit inside the tip of the side plate 3 on the inner side surface of each of the upper and lower ring-shaped supports 1 and 2.

18 is a support bolt that supports the support plate 6;
The bolt 18 is screwed onto the upper side of the support plate 6 from the outside of the upper ring-shaped support 1.

Reference numeral 19 denotes a clamping bolt, which is inserted into the side plate 3 and screwed at its upper and lower ends to the upper and lower ring-shaped supports 1 and 2, respectively, thereby supporting the supports 1 and 2 with clamping pressure. It is something.

Reference numeral 20 indicates a reinforcing rib extending horizontally inside the side plate 3.

21 is a block lifting metal fitting.

S indicates a block molding space.

The reinforced concrete block B can also be used by cutting it from the center and dividing it into two parts.
The cavity B-3 is formed into a truncated cone shape so that the upper and lower concave portions B-1 and B-2 are formed therein.

The embodiment of the present invention is constructed as described above, and when molding the reinforced concrete block B, the upper and lower ring-shaped supports 1 and 2, the side plates 3, and the core body 4 are used to form the mold. Assemble frame A, place the form A horizontally on a non-vibration centrifugal forming machine, and feed the specified amount of concrete into form A while rotating the form A with the forming machine. The same concrete is press-fitted into each block forming space S of frame A to form the same block B, and then the form A is removed from the molding machine, steam-cured for a predetermined period of time, and the form A is demolded. This is a good thing, especially when demolding the formwork A.
8, by unscrewing the clamping bolt 19 and lifting the upper ring-shaped support 1 upward, the support of the side plate 3 by the positioning member 15 provided on the support 1 and the side plate support member 17 is released. Then, remove the same side plate 3 from inside the formwork A, and adjust the depth adjustment device 7 to slide the core 5 outward.
Since the core 5 is formed into a tapered shape with a draft angle of 5% or more, the core 5 can be removed from the mold more easily than the molded block B.

Furthermore, in the present invention, the depth is adjusted by rotating the main adjustment bolt 9 provided on the support plate 6 and moving the core 5 forward or backward using the adjustment support 10 screwed onto the bolt 9. can do.

According to the present invention, the core peripheral surface has a draft slope of 5%.
Due to the tapered shape described above, the core can be removed from the mold reliably and easily, which was a problem in the past, thereby improving work efficiency and the quality of the reinforcing block. It has the effect of being able to

Furthermore, according to the present invention, the depth adjustment device 7
Since the depth of the core 5 can be adjusted by moving the core 5 back and forth, the cavity of the concrete block can be formed accurately.

[Brief explanation of drawings]

FIG. 1 is a partial side view of a formwork having a reinforced concrete block molding structure according to the present invention. FIG. 2 is a perspective view of the main parts. FIG. 3 is a plan sectional view of the main part. FIG. 4 is a partially enlarged cross-sectional view of the main part. Fifth
The figure is a partially enlarged vertical cross-sectional view of the main part. A: Formwork, B: Reinforced concrete block, B
-3: Cavity, 5: Core.

Claims (1)

[Claims for Utility Model Registration] One end of the core 5 is attached to the support plate 6 of the formwork A to form the cavity B-3 of the reinforced concrete block B, and the draft slope around it is 5. In a reinforced concrete block molded structure formed into a tapered shape of % or more, an adjustment support 10 is provided inside the core 5, and a main adjustment member protrudes inward from the outside of the support plate 6. Screw the bolt 9 into the adjustment support 10,
A reinforced concrete block molding structure characterized in that a core 5 is attached so as to be freely advanced and retracted, and the depth of the core 5 can be freely adjusted by rotating a bolt 9.