JPH07110493B2 - Inner peripheral surface processing equipment for centrifugally molded concrete products - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inner peripheral surface processing apparatus for centrifugally molded concrete products.

[0002]

2. Description of the Related Art Conventionally, centrifugally molded concrete products such as fume pipes are manufactured by a centrifugal molding machine. The centrifugal molding machine is equipped with a tubular formwork whose axial direction is horizontal. By fixing the preformed cage of rebar and rotating the mold, by putting concrete into the mold and applying a strong centrifugal force to the concrete,
It enables the production of dense reinforced concrete products.

[0003]

However, in the above-described centrifugal molding machine, the outer peripheral surface of the reinforced concrete product to be molded is accurately formed by the outer peripheral surface forming mold part of the mold, but the inner peripheral surface side is Since the concrete had to be poured, there was no formwork for forming the inner peripheral surface, and therefore the inner peripheral surface was manually processed.

That is, an operator arranges a long trowel in the front-rear direction on the lower portion of the inner peripheral surface of the mold to scrape the inner peripheral surface of the concrete in the mold rotating integrally with the mold. In addition to the fact that the scraping and leveling work is a heavy labor, and the inner diameter of the concrete product requires high accuracy,
It required skill, and in combination with lack of manpower, it was desired to mechanize the leveling work.

[0005]

Therefore, in the present invention, there is provided an inner peripheral surface processing apparatus for processing the inner peripheral surface of a centrifugally molded concrete product molded by a centrifugal molding machine,

A shaping jig support arm is provided in the main body of the apparatus so as to be able to move forward and backward, and a shaping jig for shaping the inner peripheral surface of the centrifugally molded concrete product is attached to the lower outer peripheral surface of the arm to support the shaping jig. The arm is formed of an inner pipe having a tip closed to form a cement supply passage therein and an outer pipe having a tip closed between the outer peripheral surface of the inner pipe to form a drainage passage. Extend the tip forward of the tip of the outer pipe, open a cement outlet at the extension, and open a drainage inlet at the tip of the outer pipe to allow the cement outlet from the device body through the cement supply passage. It is intended to provide a device for processing the inner peripheral surface of a centrifugally molded concrete product, characterized in that it is possible to blow out more cement, while also allowing drainage to be sucked into the main body of the device through a drainage channel from a drainage inlet. A.

[0007]

[Function] When manufacturing centrifugally molded concrete products such as fume pipes, concrete is thrown into a tubular form having a cage of reinforcing bars fixed therein while rotating the form,
A strong centrifugal force is applied to the concrete to produce a dense reinforced concrete product.

At this time, the shaping jig support arm of the inner peripheral surface processing apparatus is inserted into the inner peripheral surface side of the tubular mold, and the shaping jig attached to the lower outer peripheral surface of the support arm is inserted into the mold. By contacting the concrete surface exposed on the inner peripheral surface,
The surface of the concrete that rotates together with the formwork is evenly leveled.

Moreover, the shaping jig support arm is moved back and forth in the front-rear direction to perform the shaping work of the concrete surface, and at the same time, through the drainage passage from the drainage suction port opened at the tip of the outer pipe of the support arm. The main body is also used for wastewater treatment work to suck in the wastewater that emerges on the surface of the concrete.

Further, after the drainage treatment work, the orthopedic jig support arm is retracted in the front-rear direction and passed through the cement supply passage from the main body of the apparatus to the cement outlet opening at the tip of the inner pipe of the support arm. Cement spraying work is carried out so that the cement is blown out more and the cement is uniformly attached to the entire inner peripheral surface of the concrete surface.

Therefore, the centrifugally molded concrete product molded as described above can be processed at the same time on the inner peripheral surface, so that the design accuracy of the inner diameter can be ensured satisfactorily.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

A to A shown in FIGS. 1 to 3 is an inner peripheral surface processing apparatus according to the present invention, which is an example of a centrifugal molded concrete product B molded in a mold K of a centrifugal molding machine (not shown). The peripheral surface a is processed. In FIG. 1, the dashed-dotted line indicates a form K for molding a large centrifugally-formed concrete product B.
Is shown.

As shown in FIGS. 1 to 3, the inner peripheral surface processing apparatus A is provided with a shaping jig support arm 2 on the apparatus main body 1 so as to be movable back and forth in the front-rear direction. A shaping jig 3 for shaping the inner peripheral surface a of the centrifugally molded concrete product B is attached to the surface. R is a form support roller.

The device body 1 includes a pair of left and right traveling rails 4,
4 is provided with a traveling bogie 5 which is self-propelled, an operating portion 6 is provided on the left front portion of the traveling bogie 5, and a hydraulic device portion 7 and a drain suction portion 8 are provided behind the operating portion 6. On the other hand, the machine frame 9 is arranged on the right side. 5a is a wheel, and 5b is a car drive motor.

The machine frame portion 9 is slidable in the left-right width direction on the traveling carriage 5 by a pair of front and rear left-right position adjusting cylinders 10, 10, 11, 11 so that the left-right position can be adjusted.

Moreover, the left and right position adjusting cylinders 10, 10, 1
1, 11 are a pair of left and right hydraulic cylinders 10a, 10a, 11
a and 11a are arranged on the same straight line in the left-right width direction so that the expansion and contraction directions are opposite to each other, and when one extends, the other shortens, and the machine frame 9 is formed. It is slidable in the left-right width direction.

Further, the machine frame 9 is a pair of front and rear right and left side columns.
12,12,13,13 and a supporting stand 14 installed between these columns 12,12,13,13 and adjustable in ascending / descending position by an ascending / descending position adjusting mechanism 15, and placed on the supporting stand 14. And an arm support frame 16 capable of adjusting the front-back inclination by a front-back inclination adjusting mechanism 17,
A forward-backward and backward-moving position adjusting mechanism 18 for adjusting the forward-backward and backward-moving position of the arm support frame 16, and a rotational position adjusting mechanism 19 that is attached to the same-side arm supporting frame 16 and is capable of adjusting the rotational position of the shaping jig support arm 2 around the axis. It consists of.

The elevating position adjusting mechanism 15 is configured such that the elevating hydraulic cylinders 15a, 15a, 15b, 15b can be vertically expanded and contracted on the horizontal frames 21, 21 which are laid across a pair of front and rear right and left columns 12, 12, 13, 13, respectively. Mounted on the bottom of each cylinder 15a, 15a, 15b, 15b
And the cylinders 15a, 15a, 15b, and 15b are expanded and contracted to adjust the support base 14 so that it can be moved up and down.

The arm support frame 16 is mounted on the support base 14 by a pivot 20.
The central part of the arm support frame 16 is swingable up and down, and the arm support frame 16 is mounted on the ball screws 22 extending in the front-rear direction by screwing advancing / retreating slide tubes 23, respectively, and rotating on the advancing / retreating slide tubes 23. A position adjusting mechanism 19 is mounted.

A front-rear advancing / retreating position adjusting mechanism 18 is mounted on the rear part of the pair of left and right ball screws 22.

The front-rear tilt adjusting mechanism 17 has a pair of left and right front-rear tilt adjusting cylinders 17a, 17a, 17 between the support base 14 and the arm support frame 16 with respect to the pivot 20 as a center.
By installing b and 17b, the front and rear tilt adjustment cylinders 17a and 17a are extended and shortened, and the rear tilt adjustment cylinders 17b and 17b are shortened and extended. It is possible.

The forward / backward position adjusting mechanism 18 includes a ball screw 22.
A hydraulic motor 25 for advancing and retracting drive is mounted on the rear part of the output shaft 25a via a stay 24, and the output gear 25 is attached to the tip of the output shaft 25a of the motor 25.
b is attached, and the output gear 25b is engaged with an input gear 22a attached to the rear end of the ball screw 22.

In this way, the forward / backward drive hydraulic motor
Forward / reverse sliding tube 23 screwed to the ball screw 22 by transmitting forward / reverse rotational force to the output shaft 25a → output gear 25b → input gear 22a → ball screw 22 by driving 25 forward / reverse rotation.
The forward / backward movement of the rotary position adjuster frame 19 mounted on the forward / backward sliding tube 23 can be adjusted.

In the rotary position adjusting mechanism 19, an arm rotation support 26 is attached to the advancing / retreating slide tube 23, and the rear end of the shaping jig support arm 2 is rotatably attached to the support 26.
While the input gear 27 is attached to the outer peripheral surface of the, the rotary drive hydraulic motor 28 is mounted on the arm rotation support 26, and the output gear 28b is attached to the output shaft 28a of the motor 28.
The input gear 27 is engaged with 27b.

In this way, the rotary drive hydraulic motor
By driving the normal and reverse rotation of 28, the output shaft 28a → the output gear 28b → the input gear 27 → the shaping jig support arm 2
The reverse rotational force is transmitted to rotate the arm 2 so that the position of the shaping jig 3 attached to the arm 2 can be adjusted.

The advancing / retreating slide tube 23 is provided with a cement feeding section 29 which is continuously connected to the rear end of the shaping jig supporting arm 2 and is installed between the front, rear, left and right side columns 12, 12, 13, 13. do it,
A cement tank 31 is placed on a cement tank support 30 that can be lifted up and down integrally with the support 14, and a cement supply pipe 32 from the cement tank 31 to a cement feeding section 29.
It is possible to supply cement through. 33 is a hydraulic motor for driving the cement feeding, 33a is an output shaft, 33b is an output gear, 29a is a feeding input gear, 29b is a feeding input shaft, 34
Is a cylinder for supplying cement.

The shaping jig support arm 2 closes the tip between the inner pipe 41 having the end closed to form the cement supply passage 40 and the outer peripheral surface of the inner pipe 41 to close the drain passage 42. Formed from the formed outer pipe 43, the tip of the inner pipe 41 is extended forward of the tip of the outer pipe 43, and the cement outlet 44 is opened in the extended portion 41a, and at the tip of the outer pipe 43. The drainage suction port 45 is opened.

A spiral conveyor 46 is provided in the inner pipe 41, and the base end of the conveyor 46 is connected to the cement feeding section 29 and supplied from the cement tank 31 to the cement feeding section 29. The cement that is delivered by a fixed amount from the delivery unit 29 is conveyed to the tip side in the inner pipe 41 by the spiral conveyor 46, and the cement can be continuously delivered from the cement delivery port 44. .

Further, the outer pipe 43 connects the beginning end of the drainage channel 42 to the drainage suction section 8 so that the drainage suction section 8 sucks the drainage through the drainage channel 42 by the suction force of the drainage suction section 8. , So that it can be discharged to the outside. 8a is a drain suction pipe, 8b is a drain tank, 8c is a vacuum pump, and 8d is a drain pipe.

As shown in FIGS. 1 and 4, the shaping jig 3 is provided with two trowels 3 on the outer tube 43 of the shaping jig support arm 2.
a, 3a and two brushes 3b, 3b in the circumferential direction 90
The trowel 3a is made of iron or the like and has a long length (for example, 220 cm) formed in a narrow width in the front-rear direction, and the tip end is formed into a blade shape, and the base end is formed into an outer tube 43a. It is detachably attached via a mounting bracket 47. 48 is a mounting bolt.

Further, the brush 3b is also formed in a long length having substantially the same front and rear width as the trowel 3a, and the base end edge is attached to the outer pipe 43 by a bracket.
It is detachably attached via 47.

Then, a trowel 3 which is the shaping jig 3 described above.
The rotational position adjusting mechanism 19 adjusts the rotational position of the shaping jig support arm 2 for any one of the brushes a, 3a or the brushes 3b, 3b, thereby lowering the inner peripheral surface a of the centrifugally molded concrete product B. The inner peripheral surface a can be shaped so that the inner peripheral surface a can be shaped.

The embodiment of the present invention is configured as described above, and according to this embodiment, the following operational effects are produced.

That is, when manufacturing a centrifugal orthopedic concrete product B such as a fume pipe, the concrete is rotated in a tubular form K in which a cage of reinforcing bars (not shown) is fixed. It is thrown in and a strong centrifugal force is applied to the concrete to produce a dense reinforced concrete product.

At this time, the inner peripheral surface processing apparatus A is moved along the traveling rails 4 and 4 to the inner peripheral surface side of the cylindrical mold,
The shaping jig support arm 2 attached to the apparatus main body 1 in the same mold K, and the machine frame portion 9 attached to the apparatus main body 1 are adjusted by each adjusting mechanism 1
The shaping jig 3 attached to the lower outer peripheral surface of the support arm 2 by adjusting the position with 5,17,18,19 is the concrete surface exposed on the inner peripheral surface of the form K. By abutting on the surface a, the surface of the concrete that is integrally rotating with the form K is evenly scraped.

Moreover, the shaping jig support arm 2 is moved forward and backward by the forward-backward and backward-movement position adjusting mechanism 18 to open and close the front end portion of the outer pipe 43 of the support arm 2 together with the above-mentioned concrete surface shaping work. The drainage treatment work is also performed in which the drainage that emerges on the surface of the concrete is sucked into the apparatus main body 1 from the drainage suction port 45 through the drainage path 42.

Further, after the drainage treatment work, while the shaping jig support arm 2 is moved back and forth in the front-rear direction, the cement is blown out from the apparatus main body 1 through the cement supply passage 40 to the tip of the inner pipe of the support arm 2. Cement is sprayed from the mouth 44, and the cement spraying work is performed so that the cement is uniformly adhered to the entire inner peripheral surface of the concrete surface.

Therefore, the inner peripheral surface a can be simultaneously processed in the centrifugally molded concrete product molded as described above, and the design accuracy of the inner diameter can be secured satisfactorily.

FIG. 5 shows four machine frame portions 9 arranged side by side on the traveling carriage 5 in the left-right width direction. As shown in FIG. 6, four centrifugally-molded concrete products having different sizes and the like. The inner peripheral surface a of B can be processed at the same time.

[0041]

According to the present invention, the following effects can be obtained.

That is, according to the present invention, since the inner peripheral surface of the centrifugally molded concrete product molded by the centrifugal molding machine can be mechanically processed at the same time as the molding of the concrete product, no labor is required. In addition to being able to perform highly accurate inner peripheral surface processing, it is possible to significantly improve the production efficiency of centrifugally-formed concrete products.

[Brief description of drawings]

FIG. 1 is a side view illustrating an inner peripheral surface processing apparatus according to the present invention.

FIG. 2 is an explanatory plan view of the device.

FIG. 3 is a rear explanatory view of the same device.

FIG. 4 is a sectional front view of a shaping jig support arm.

FIG. 5 is an explanatory plan view of an inner peripheral surface processing apparatus as another embodiment.

FIG. 6 is an explanatory view of a usage state of the device.

[Explanation of symbols]

 A Inner peripheral surface processing device B Centrifugal molded concrete product 1 Machine body 2 Molding jig support arm 3 Molding jig 4 Traveling rail 5 Traveling carriage 6 Operation part

Claims (1)

[Claims] 1. An inner peripheral surface processing apparatus for processing the inner peripheral surface of a centrifugally molded concrete product molded by a centrifugal molding machine, wherein a shaping jig support arm is movable forward and backward in a main body of the apparatus. A shaping jig for shaping the inner circumferential surface of the centrifugally-molded concrete product is attached to the lower outer circumferential surface of the arm , and the shaping jig support arm has an inner pipe with a tip closed to form a cement supply path inside. , The outer pipe of the inner pipe and the outer pipe having a drainage path formed by closing the tip between them,
Extend the tip of the inner tube forward of the tip of the outer tube,
Along with opening the cement outlet in the extension part and opening the drainage inlet at the tip of the outer pipe, it is possible to blow out the cement from the equipment body through the cement supply passage through the cement outlet, while draining from the drainage inlet. An inner peripheral surface processing device for centrifugally molded concrete products, characterized in that it is possible to draw wastewater into the device body through a passage.