JP2000271911A - Mechanism for giving circular notion to table and concrete molding device using this mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a concrete molding device for molding a concrete having an optimally fine surface and high strength by optionally changing the rotating diameter of a circular motion. SOLUTION: This mechanism 61 for giving a circular motion to a table comprises a rotation checking means for checking the rotation of a table 2 itself by providing eccentric bearing outer rings 636, 645, rotary device shafts 63, 64 and eccentric shafts 633, 647 directly connected to the rotary drive shafts 63, 64 on the table 2 and fitting the eccentric bearing outer rings 636, 645 to the eccentric shafts 633, 647, in a freely slidable and rotatable manner, on a face in the orthogonal direction with the rotary drive shafts 63, 64, and further, adjusts the rotating radius of a circular motion in the table face direction in accordance with the sliding extent of the eccentric bearing outer rings 636, 645 to the eccentric shafts 633, 647. This mechanism 61 for giving a circular motion is used for realizing the horizontal circular motion of the rocking table 2 on the horizontal face of the table 2 on which a concrete form 1 is disposed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a circular motion imparting mechanism in the direction of a table surface and a concrete forming apparatus for forming concrete using the circular motion imparting mechanism in the direction of the table surface.

[0002]

2. Description of the Related Art Conventionally, various concrete molding devices have been proposed as a concrete molding device in which ready-mixed concrete is caused to flow into a formwork to remove air bubbles and the like, and to fill and compact the ready-mixed concrete. In these conventional devices, as shown in Japanese Patent Publication No. 58-18884, a device for filling the form itself by vibrating the mold itself up and down by a vibrator 20, and as shown in Japanese Patent Publication No. 59-48725, There is generally known a device for compacting concrete by horizontally swinging a swing table by a horizontal swing mechanism 3, that is, a device in which a form itself vibrates vertically or horizontally at high speed.

Further, as disclosed in Japanese Patent No. 2627133, as a type in which concrete is formed by movements such as vertical and horizontal swinging motions, the center of the bottom of the formwork is swung about a fulcrum 4. Devices for filling and forming concrete are also known. Furthermore, as a type of molding concrete by vibration or pressure in a mold, Patent No. 261711
No. 5, as shown in Japanese Patent Publication No. 7-10528, a device that vibrates and fills the ready-mixed concrete in the form by vibrator 5 up and down. A device is known in which pressed concrete is pressed by a press plate 11 to fill ready-mixed concrete.

Japanese Patent Publication No. 58-18884 discloses a conventional apparatus for filling by vibrating up and down, and Japanese Patent Publication No. 59-48725 discloses an apparatus for rocking concrete by swinging in the horizontal direction. In the concrete molding device that moves like the vertical and horizontal swing motion of 2627133,
Only by eliminating bubbles, the specific gravity between the concrete surface and the interior was almost the same, and the concrete surface was not necessarily dense, and therefore, the strength of the concrete molding itself was decent.

Also, since the vertical vibration is as high as 6000 rpm,
Maintenance was troublesome, the efficiency was low, and the noise was loud. Especially when the construction site was near a residential area, it was a very troublesome environmental problem. Furthermore, in concrete moldings in cold regions, those having moderate air bubbles inside are considered to have high durability, and it is difficult to leave air bubbles only inside the above conventional apparatus.

On the other hand, as disclosed in Japanese Patent No. 2617115 and Japanese Patent Publication No. Hei 7-10528, an apparatus for forming concrete by applying vibrations or pressurizing the inside of a mold is in addition to the problems in the above-described apparatus. Therefore, since the vibrating member and the press member are inserted into the ready-mixed concrete in the formwork, there is a problem that it takes time to perform maintenance such as removal of concrete adhering to these members.

Accordingly, the present inventor has developed a concrete in which the outer surface of a concrete molded product is formed of cement, iron sand or silica sand having a higher specific gravity than that of the inside, and the inside has moderate air bubbles. In order to provide a concrete molding device for producing concrete molded products with dense concrete surfaces and high strength, Japanese Patent Application
As No. 02382, in a concrete forming apparatus having a concrete form into which ready-mixed concrete mixed with sand having a large specific gravity is poured, and a rocking table on which the concrete form is placed, the rocking table has a horizontal surface. A concrete molding device with a swinging mechanism that makes a horizontal circular motion was proposed.

[0008]

[Problems to be solved by the invention] Japanese Patent Application No. Hei 10-20238
The mechanism for imparting horizontal circular motion to the table in the horizontal plane in the invention of No. 2 is configured to impart horizontal circular motion to the table in the horizontal plane using a circular eccentric cam. However, the invention of Japanese Patent Application No. Hei 10-202382 discloses a concrete molding in which the outer surface of a concrete molded product is formed of cement, iron sand, or silica sand having a higher specific gravity than the inside, and moderate bubbles are present inside. In this case, concrete is poured into the formwork, but as the formwork starts to move circularly, the concrete starts to wave in the formwork, and eventually the concrete will spill out of the formwork There was a problem. Further, the circular motion imparting mechanism in the direction of the table surface in the invention of Japanese Patent Application No. 10-202382 described above uses a circular eccentric cam, the rotational diameter of circular motion is constant, and the rotational radius of circular motion is changed during operation. In addition, there is a problem in that when the rotation radius of the circular motion is changed for each operation, the circular eccentric cam must be replaced one by one. In addition, the conventional circular motion imparting mechanism that can freely adjust the radius of the circle has a problem that the structure is complicated and the rigidity is not sufficient and is not suitable for use in a heavy concrete molding machine. there were.

The present invention has been made in view of the above problems, and an object thereof is to provide a circular motion imparting mechanism that can have a relatively simple and strong structure.
It is an object of the present invention to provide a circular motion imparting mechanism capable of arbitrarily and easily changing the rotational radius of a circular motion. When molding concrete made of cement, iron sand or silica sand with a higher specific gravity and having moderate air bubbles inside, the formwork starts circular motion by arbitrarily changing the radius of rotation of circular motion Gradually, concrete begins to undulate in the formwork, but this undulation phenomenon can be suppressed,
It is an object of the present invention to provide a concrete molding apparatus for producing a concrete molded article having a concrete surface having an optimum density and a large strength.

[0010]

According to a first aspect of the present invention, an eccentric bearing outer ring, a rotary drive shaft and an eccentric shaft directly connected to the rotary drive shaft are provided on a table. All the cross-sectional shapes of the eccentric shaft in the direction perpendicular to the rotary drive shaft are the same shape, and the eccentric shaft is fitted with the eccentric bearing outer ring slidably and rotatably on the surface perpendicular to the rotary drive shaft, This is a circular motion imparting mechanism for a table, which is provided with a rotation preventing means for preventing the table itself from rotating, and adjusts the rotational radius of the circular motion in the direction of the table surface in accordance with the degree of sliding of the eccentric bearing outer ring with respect to the eccentric shaft. . In order to solve the above-mentioned problems, the invention according to claim 2 comprises a concrete form into which ready-mixed concrete mixed with fine and large specific gravity sand is poured, and a swing table on which the concrete form is placed. 2. The concrete forming apparatus according to claim 1, wherein said oscillating table makes a horizontal circular motion in a horizontal plane.
A concrete molding apparatus using the circular motion imparting mechanism of the table described in 1 above.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [Embodiment 1] Here, one preferred embodiment of a circular motion imparting mechanism of the present invention and one preferred embodiment in which the circular motion imparting mechanism is applied to a concrete molding apparatus will be described. As will be described, FIG. 1 is a perspective view showing the entire concrete molding apparatus, and FIG. 2 is a side sectional view taken along a dashed line AA of FIG. In FIG. 1, a swing table 2 on which a concrete form 1 into which ready-mixed concrete is poured is placed in a horizontal circular motion with respect to an intermediate table 3, and the intermediate table 3 is vertically moved with respect to a base table 4. I am exercising.

First, the structure in which the intermediate table 3 moves up and down will be described. 2, a pair of up-and-down swing mechanisms 5 are arranged between the intermediate table 3 and the base table 4 along the side surface of the table. A synchronous motor 51 that rotates synchronously with each of the vertical swing mechanisms 5 is installed, and the rotation of the motor 51 is reduced by a reduction mechanism (not shown).
One end of the rod member 53 connected to 2 is connected and reciprocates right and left. The other end of the rod member 53 is a rotating member
The rod member 53 is loosely fitted into the vertically long hole 541 of the 54, and the rod member 53 rotates the rotating member 54 about the fixed support shaft 542, and the swing shafts provided at both ends of the rotating member 54. 543,544
Has a pair of rod members 545 and 546 pivotally supported rotatably.

Link mechanisms 55 are provided at the four corners of the intermediate table 3 and the base table 4, and a pair of link mechanisms 551 and 552 are provided with a fixed link support shaft 3 of the intermediate table 3.
1, 32 and fixed link support shafts 41, 42 of the base table 4 are provided, and the fixed link support shafts 31, 32, 41, 42 support a pair of link members 553, 554 and 555, 556, respectively, and link members 553, 554, 555, 556. Are connected by swing shafts 557 and 558, and end portions 5 of the pair of rod members 545 and 546 are connected to each other.
47,548 are also linked. Therefore, the rotation of the motor 51 causes the rotating member 54 to move and rotate in the forward and reverse directions, and the rod members 545 and 546 also move right and left. The intermediate table 3 swings up and down with respect to the base table 4 by repeating the link mechanism 55 standing up and breaking. The swing is preferably in the range of 100 to 500 reciprocations per minute, and is set to about 300 reciprocations per minute in this embodiment.

Next, a circular motion imparting mechanism mechanism 6 in which the swing table 2 makes a horizontal circular motion in a horizontal plane will be described with reference to FIGS. In FIG. 2, the intermediate table 3 and the swing table 2
A pair of horizontal circular motion mechanisms 61 and 62 are provided between the intermediate table 3 and one of the horizontal circular motion imparting mechanisms 61 includes a motor 611 whose rotation speed can be controlled by an inverter control on the intermediate table 3 and a fixing member 612 such as a bolt. The rotation is reduced by the reduction gear 613 to rotate the rotary spindle 63 at a reduced speed. The rotary spindle 63 is rotatably supported by a bearing member 632 fixed to the intermediate table 3 by a fixing member 631 such as a bolt. I have. FIG.
As shown in the figure, the eccentric shaft 633
Are directly connected, but the center line C2 of the eccentric shaft 633 having a rectangular cross section is inclined with respect to the center line C1 of the rotating main shaft 63, and the eccentric shaft 633 is slidably supported by the eccentric bearing inner ring 634. ,
The eccentric bearing inner ring 634 is rotatably supported by an eccentric bearing outer ring 636 via a bearing member 635, and is fixed to the swing table 2 by a fixing member 637 such as an eccentric bearing outer ring 636 bolt.

At the center of the eccentric bearing inner ring 634, there is provided a sliding hole 638 corresponding to the horizontal cross-sectional shape of the eccentric shaft 633. On the other hand, the cross-sectional shapes of the eccentric shafts 633 are all the same rectangular shape. Therefore, the eccentric shaft 633 is slidably fitted in the direction of the rotation drive shaft serving as the rotation main shaft 63. Therefore, the eccentric bearing inner ring 634 is freely rotatable in a horizontal plane perpendicular to the rotating main shaft 63 (drive shaft), and is slidable vertically with respect to the eccentric shaft 633. The relationship between the cross-sectional shape of the eccentric shaft 633 and the shape of the sliding hole 638 is similar to the shape of the sliding hole 638, but the point is that the outer ring follows the rotation of the eccentric shaft 633. The eccentric shaft 633 may be rotated, and the cross-sectional shape of the eccentric shaft 633 may not be rectangular, but may be other polygons or circular. In the case of circular, if the outer ring is brought into direct contact with the bearing, the inner ring becomes unnecessary. Because of the above configuration,
When the eccentric bearing inner ring 634 is at the low position of the eccentric shaft 633, the rotating spindle 63
Of the eccentric shaft 633 with respect to the center line C2 of the eccentric shaft 633 is small, so that the turning radius of the table is small, and the higher the upper position, the larger the shift from the center line C2 to the center line C1. Since the rotation radius of the table increases, the rotation radius of the circular motion in the direction of the table surface can be adjusted in accordance with the relationship between the eccentric shaft 633 and the eccentric bearing inner ring 634. On the other hand, it is necessary to provide a rotation preventing means so that the table itself does not rotate according to the rotation of the eccentric shaft 633. In this embodiment, a pair of horizontal circular motion mechanisms 61 and 62 are provided to rotate the table itself. Has been blocked.

The rotating main shaft 64 of the other horizontal circular motion mechanism 62 is fixed to the intermediate table 3 by fixing members 641, 642 such as bolts.
It is rotatably supported by a pair of bearing members 643, 644 fixed by the like, and is rotated by a timing belt 646 stretched over the pulley member 639 of the rotating main shaft 63 and the pulley member 645 of the rotating main shaft 64. At the upper end of the rotating main shaft 64, an eccentric axis is inclined like the horizontal circular motion mechanism 61.
The eccentric bearing inner ring 648 is slidably and rotatably supported by the eccentric bearing inner ring 648, and the eccentric bearing inner ring 648 is pivoted by a fixing member 649 such as a bolt via a bearing member and an eccentric bearing outer ring.
It is fixed to.

On the other hand, between the intermediate table 3 and the oscillating table 2 are provided horizontal and vertical movement mechanisms 61 and 62, as well as up and down position adjustment mechanisms 7 at four corners. Since the ball bearing member 71 is provided on the lower surface and the swing table 2 is supported so as to be freely movable with respect to the intermediate table 3, the swing table 2 is circularly moved in a horizontal plane by the circular motion imparting mechanism mechanism 6. Perform Further, in the vertical position adjusting hydraulic mechanism 7, a hydraulic cylinder 72 is provided between the ball bearing member 71 and the oscillating table 2, and the hydraulic control from the oil supply pipe 73 (not shown) allows the apparatus to be operated even during operation. The vertical position of the swing table 2 is adjusted. As a result, the eccentric bearing inner ring 6
Adjust the position of 34 to adjust the radius of rotation of the circular motion in the direction of the table surface. Therefore, as a mechanism for adjusting the degree of the radius of rotation of the circular motion in the direction of the table surface, the structure is relatively simple and can be manufactured firmly. It is a mechanism that can withstand even when used in a molding device.

[Operation] Next, the operation of the horizontal circular motion mechanism 6 and the operation of the concrete form 1 into which the ready-mixed concrete is poured and the swing table 2 will be described. The swing table 2 shown in FIG. 6 is rotated at about 100 to 500 rpm by a pair of horizontal circular motion mechanisms 61 and 62 if the movement is viewed only on the horizontal plane.
If the rotation is too slow and 100 rpm or less, centrifugal force will not act. Conversely, if the rotation is fast and 500 rpm or more, the vibration will be the same as right and left vibration, and the centrifugal force will not act effectively. In this embodiment, the rotation is performed at 200 to 350 rpm. In this case, the centrifugal force acts effectively, and the swing table 2 continues the circular motion 21 as shown in the motion direction 21. The above eccentric shaft
The rotation of the rotary swing table 2 at about 100 to 500 rpm of 633,647 is much slower than the conventional vibration.
Since the rpm is much slower than before, the noise can also be made very low compared to conventional devices.

At this time, also in the donut-shaped circular concrete form 1 shown in FIGS. 7A and 7B, since the direction of movement 21 is circular, the injected ready-mixed concrete has a centrifugal force. Works. Therefore, general gravel and sand have a lower specific gravity than the cement itself, cement with a high specific gravity in ready-mixed concrete migrates near the surface, and sand with a high specific gravity also migrates near the surface, and bubbles and the like are trapped inside. Will stay. In the case of the gravel and sand mixed with the ready-mixed concrete, by mixing a desired amount of fine sand having a large specific gravity, for example, iron sand, silica sand, etc., the surface of the concrete molded product as described above can easily be dense. A concrete molded product having high strength can be obtained.

Here, an example of an actual operation state in the above-described apparatus will be described. The operation is performed in the following order (1) to (3). (1) The form 1 has a capacity to fill 350 kg of concrete, and at the beginning of operation, the swing table 2 is set at a rotation speed of 200 rpm and a turning radius of 1.5 cm in a circular motion. (2) The swing table 2 is set as described above. While operating at the setting, concrete is gradually injected in about 2 to 3 minutes until it reaches about 80% of the formwork 1, but the concrete starts to wave in the formwork, and concrete spills out of the formwork. State. If the concrete spills out of the mold before reaching about 80% of the mold 1, the number of rotations is reduced. (3) In the last 30 seconds, the radius of rotation of the circular motion is gradually reduced to finally reduce it to about 2.5 mm in order to suppress the waving phenomenon of concrete and prevent it from spilling from the formwork, and at the same time reduce the centrifugal force. Swing table 2
Gradually increase the rotation speed to 350 rpm. According to the manufacturing method as described above, it is possible to smoothly manufacture a concrete molded product having a concrete surface with an optimum dense surface and a large strength.

In this case, as shown in FIGS. 1 and 2, the degree of the centrifugal force is adjusted by the hydraulic cylinder 72 of the vertical position adjusting mechanism 7.
, The vertical position of the swing table 2 is adjusted and fixed,
As a result, the position of the eccentric bearing inner ring 634 with respect to the eccentric shaft 633 is adjusted to finely adjust the degree of the radius of rotation of the circular motion in the direction of the table surface. In FIG. So that the position is near the arrow D,
The hydraulic cylinder 72 of the vertical position adjusting mechanism 7 is controlled so that the position of the eccentric bearing inner ring 634 becomes a position near the arrow E when the operation of the apparatus is completed.

Also, in the hollow rectangular concrete form 11 shown in FIGS. 8A and 8B, the circular concrete form 1
Similarly to the above, since the motion direction 21 performs a small circular motion 21, sand and the like having a high specific gravity in the ready-mixed concrete move near the surface due to the centrifugal force 23, and bubbles and the like remain inside. Although the air bubbles may be almost completely eliminated by the vertical swing mechanism 5, it is said that in cold regions, it is better that some air bubbles remain inside the concrete molded product. Its presence can also be easily controlled.

This is the same even if the center is not a hollow form as described above, and the center part as shown in FIG. 9 has a cylindrical form 12 filled with concrete, and FIG. In the square pillar form 13 as shown in
Since 21 performs a small circular motion 21, the centrifugal force 24, 25
As a result, sand and the like having a large specific gravity in the ready-mixed concrete move to the vicinity of the surface, and a concrete molded product having a dense concrete surface and a high strength can be obtained. In addition, the amount of air bubbles remaining in the concrete molded product can be easily controlled. Further, bubbles and the like are released from the upper surface and compacted by the above-mentioned vertical rocking mechanism 5, but the number of reciprocations of the vertical rocking mechanism 5 up and down is 3
About 00 rpm, the degree of air bubble release can be controlled,
The noise is relatively low.

[Embodiment 2] The vertical position adjusting hydraulic mechanism 7 described above.
The vertical movement was mainly performed by controlling a hydraulic cylinder. A vertical movement type using a jack will be described as a second embodiment with reference to FIG. In this case, the up-down swing mechanism 5 in the first embodiment may be a mechanism for adjusting the up-down position by the up-down position adjustment jack mechanism 8. One vertical swing mechanism 5 may be added. In FIG. 10, since the swing table 2 does not move up and down, support columns 75 are provided at four corners, and a ball bearing member 76 is provided above the support columns 75, so that the swing table 2 can move freely with respect to the intermediate table 3. Swing table 2
Performs circular motion on a horizontal plane by the circular motion imparting mechanism mechanism 6. Here, a pair of vertical position adjusting jack mechanisms 8 are arranged between the intermediate table 3 and the base table 4 along the side surface of the table. A jack driving motor 81 is installed in the vertical position adjusting jack mechanism 8, and when the motor 81 rotates, one end of a rod member 83 connected to the worm gear 82 is connected, so that a reciprocating movement to the left and right is possible. The other end of the rod member 83 is an elongated hole 841 in the vertical direction of the rotating member 84.
And the rod member 83 is rotated about the fixed support shaft 842 about the rotation member 84, and the swing shafts 843, 844 provided at both ends of the rotation member 84 are connected to a pair of rod members 845. , 8
46 is rotatably supported.

Link mechanisms 85 are provided at the four corners of the intermediate table 3 and the base table 4, and a pair of link mechanisms 851 and 852 are provided on the fixed link support shaft 3 of the intermediate table 3.
The fixed link support shafts 31, 32, 41, 42 are provided with a pair of link members 853, 854, 855, 856, respectively, and the link members 853, 854, 855, 856 are supported by the fixed link support shafts 31, 32, 41, 42, respectively. Are connected by swinging shafts 857 and 858, and end portions 8 of the pair of rod members 845 and 846 are connected.
47,848 are also connected. Therefore, the rotation of the jack driving motor 81 causes the rotation member to rotate through the worm gear 82.
The rod 84 moves in the forward and reverse directions and rotates, and the rod members 845 and 846 also move right and left. The intermediate table 3 swings up and down with respect to the base table 4 by repeating the link mechanism 85 being upright or broken. By controlling the drive motor 81, the height of the intermediate table 3 can be freely controlled, and the swing table 2 and the intermediate table 3 can be controlled.
Can be freely controlled. As a result, the position of the eccentric bearing inner ring 634 with respect to the eccentric shaft 633 is adjusted to adjust the degree of the radius of rotation of the circular motion in the direction of the table surface. The vertical position adjusting mechanism of the second embodiment is different from the hydraulic pressure of the first embodiment,
Since it is a jack type, it is strong against vibrations and can reliably maintain the horizontal position of the intermediate table 3. The mechanism for adjusting the degree of the radius of rotation of the circular motion in the direction of the table surface is similar to that of the first embodiment. Can be easily and firmly manufactured,
It is a mechanism that can sufficiently withstand the use of an object to be driven in a heavy concrete molding apparatus.

It is needless to say that the present invention is not limited to the above-mentioned embodiment unless the characteristics of the present invention are impaired. For example, the horizontal circular motion mechanism is paired, but it is driven stably. For this purpose, three or more horizontal circular motion mechanisms may be provided, and other known means may be used. The vertical position adjusting mechanism 7 employs a hydraulic control mechanism and a jack type. However, any other mechanism may be used as long as the vertical position of the swing table 2 can be adjusted and fixed. A combination of a mating hole and a fitting pin may be used. Further, the pair of horizontal circular motion mechanisms 61 and 62 are driven synchronously by a timing belt. However, even if they are not strictly synchronized, it is sufficient that circular motion is imparted to the swing table. More than one may be provided.

[0027]

As described above, according to the first aspect of the present invention, the table is provided with the eccentric bearing outer ring, the rotary drive shaft and the eccentric shaft directly connected to the rotary drive shaft, and the rotation of the eccentric shaft is provided. The cross section in the direction perpendicular to the drive shaft is all the same shape,
An eccentric bearing outer ring is slidably and rotatably fitted on a surface perpendicular to the rotation drive shaft with respect to the eccentric shaft, and a rotation preventing means is provided for preventing the table itself from rotating. The table is a circular motion imparting mechanism that adjusts the radius of rotation of the circular motion in the direction of the table surface in accordance with the degree of sliding of the eccentric bearing outer ring, so that the structure can be made relatively simple and strong. As long as the sliding position of the eccentric shaft of the eccentric bearing outer ring is changed, the rotational radius of the circular motion can be arbitrarily and easily changed even during operation.

According to the second aspect of the present invention, a concrete form is provided with a concrete form into which ready-mixed concrete mixed with fine sand having a large specific gravity is poured, and a swing table on which the concrete form is placed. 2. The apparatus according to claim 1, wherein a horizontal circular movement is performed on the horizontal surface of the swing table.
Is a concrete molding device using the circular motion imparting mechanism of the table described in the above, it is sufficiently durable as a circular motion imparting mechanism of the table of the heavy concrete molding device, and, optionally, the rotation diameter of the circular motion The effect of being able to make subtle changes is obtained. As a result, when molding the concrete surface where the outside surface of the concrete molded product is formed of cement, iron sand or silica sand with a higher specific gravity than the inside, and there are moderate bubbles inside,
By arbitrarily changing the radius of rotation of the circular motion, concrete starts to undulate in the formwork as the formwork begins to move in a circular motion, but this undulation phenomenon can be suppressed, and the concrete surface can be adjusted to the optimum density and optimum. The effect that strength can be obtained is obtained. In cold regions, it is considered better to have some air bubbles remaining inside the concrete molded product. If some air bubbles should remain inside the concrete molded product, the amount of air bubbles remaining inside the molded product should be reduced. Can be easily controlled.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an entire concrete molding apparatus according to a first embodiment of the present invention.

FIG. 2 is a side sectional view of the concrete molding apparatus shown in FIG.

FIG. 3 is a sectional perspective view of a main part of a horizontal circular motion mechanism (circular motion imparting mechanism mechanism 6).

4 is a horizontal circular motion mechanism of FIG. 3 (circular motion imparting mechanism mechanism 6).
Longitudinal section of the main part of

5 is a horizontal circular motion mechanism of FIG. 3 (circular motion imparting mechanism mechanism 6).
BB of the main part of the section taken along the dash-dotted line from the bottom

FIG. 6 is a view for explaining the operation of the embodiment of the present invention, and is an explanatory view for explaining the direction of movement of the swing table on a horizontal plane.

7 (a) is a perspective view of a circular concrete formwork, and FIG. 7 (b) is a plan view illustrating the movement of ready-mixed concrete.

8A is a perspective view of a rectangular concrete formwork, and FIG. 8B is a plan view illustrating the movement of ready-mixed concrete.

FIG. 9 is a plan view illustrating the movement of ready-mixed concrete in a cylindrical concrete formwork.

FIG. 10 is a plan view for explaining the movement of ready-mixed concrete in a square pillar-shaped concrete formwork.

FIG. 11 is a side sectional view of a concrete molding apparatus according to a second embodiment of the present invention.

[Explanation of symbols]

1 ... hollow circular concrete form 11 ... hollow rectangular concrete form 12 ... cylindrical concrete form 13 ... square pillar concrete form 2 ... swing table 21 ... movement direction 22,23,24,25 ... centrifugal force direction ( 3 ... Intermediate table 31,32 ... Fixed link support shaft 4 ... Basic table 41,42 ... Base fixed link support shaft 5 ... Vertical rocking mechanism 51 ... Synchronous motor 52 ... Eccentric cam 53 … Rod member 54… Rotating member 541… Elongated hole 542… Fixed support shaft 543,544… Swing shaft 545,546… Rod member 547,548… End 55,551,552… Link mechanism 553,554,555,556… Link member 557,558… Swing axis 6… Circular motion imparting mechanism mechanism 61,62: Horizontal circular motion imparting mechanism 611: Motor 612, 631, 637, 641, 642: Fixed member 613: Reduction gear 63, 64: Rotating spindle 632, 635, 643, 644: Bearing member 633, 647: Eccentric shaft 634, 648: Eccentric bearing inner ring 636, 645: Eccentric bearing outer ring 638: Slide Running hole 639,645 Pulley member 646 Timing belt 7 Vertical position adjusting hydraulic mechanism 71,76 Ball bearing member 72 Hydraulic cylinder 73 Oil supply pipe 75 Support column 8 Vertical position adjusting jack mechanism 81 Jack drive motor 82 Worm gear 83 Rod Member 84 ... Rotating member 841 ... Slot 842 ... Fixed support shaft 843,844 ... Swing shaft 845,846 ... Rod member 847,848 ... End 85,851,852 ... Link mechanism 853,854,855,856 ... Link member 857,858 ... Swing shaft

Claims (2)

[Claims] An eccentric bearing outer ring, a rotary drive shaft and an eccentric shaft directly connected to the rotary drive shaft are provided on a table, and the eccentric shaft has the same cross-sectional shape in a direction perpendicular to the rotary drive shaft.
An eccentric bearing outer ring is slidably and rotatably fitted on a surface perpendicular to the rotation drive shaft with respect to the eccentric shaft, and a rotation preventing means is provided for preventing the table itself from rotating. A circular motion imparting mechanism for a table, wherein a rotation radius of a circular motion in a direction of a table surface is adjusted according to a degree of sliding of an eccentric bearing outer ring. 2. A concrete forming apparatus comprising a concrete form into which ready-mixed concrete mixed with fine sand having a large specific gravity is poured, and a rocking table on which the concrete form is placed. A concrete forming apparatus using the table circular motion imparting mechanism according to claim 1 for performing horizontal circular motion.