JP2002361616A - Apparatus for molding secondary concrete product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for molding a secondary concrete product which is capable of a calm operation with the generation of noise during compacting ready-mixed concrete controlled. SOLUTION: A base 3 installed horizontally, at least three ball bearings 5 arranged on the base 3, a table 4 which is supported by the ball bearings 5 and can mount a mold frame 1 on its upper surface, a motor 6 arranged in the middle of the base, and two eccentric shafts 7a and 7b connected eccentrically to the output shaft of the motor 6 are provided. When the eccentric shafts 7a and 7b are connected rotatably to the table 4, and the motor 6 is actuated, the table is enabled to rotate around the output shaft.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for molding a secondary concrete product for molding a box culvert or the like.

[0002]

2. Description of the Related Art A secondary concrete product such as a box culvert is manufactured by setting a reinforcing bar in a mold, pouring ready-mixed concrete, and releasing after a curing period. In the production of such concrete secondary products,
It is important to compact the fresh concrete after casting. This compacting is intended to spread the ready-mixed concrete throughout the inside of the formwork and to make the packing density uniform.

Conventionally, compaction in the molding of ready-mixed concrete has been performed by forcibly fluidizing the ready-mixed concrete by applying vibration to a formwork. That is, there is a type in which a mold is mounted on a table on which low-frequency vibration is caused by a vibration generator, or a high-frequency vibration is applied by providing a vibration generator in a forming mold itself.

[0004]

However, when low-frequency vibration or high-frequency vibration is applied to a mold, a loud noise is generated, and the working environment is deteriorated.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an apparatus for forming a secondary concrete product capable of quietly operating while suppressing noise during compaction of fresh concrete.

[0006]

SUMMARY OF THE INVENTION The present invention provides a base installed in a horizontal position, at least three ball bearings disposed on the base, and a table supported by the ball bearings and capable of mounting a formwork on an upper surface. A motor disposed at the center of the base, and two eccentric shafts connected eccentrically to an output shaft of the motor, wherein the eccentric shaft is rotatably connected to the table so that the motor is rotatable. When the is operated, the table can be rotated around the output shaft.

In such a configuration, a wedge mounted on the ball bearing and having an inclined lower surface may be provided on the lower surface of the table.

Further, the base is mounted on a section steel having a horizontal posture, and a base end of the base is connected to the section steel via a hinge, and a tilting operation is performed between a tip of the base and the section steel. It is also possible to adopt a configuration in which the cylinders are connected.

Further, a base end of a tilt angle adjusting plate mounted on the ball bearing is provided at a position on the lower surface of the base facing the ball bearing so as to be rotatable in the vertical direction, and the tilt angle is adjusted. The plate may be connected to a cylinder that moves the tip of the plate up and down.

In the apparatus for forming a secondary concrete product according to the present invention, at least two support rollers rotatably arranged on a base are arranged at intervals between their respective axes, and the support rollers are arranged. A table capable of reciprocating in the direction and capable of vertically moving up and down, mounting a mold for molding on the table, and disposing a guide liner having a concave bottom on the lower surface of the table, Is mounted on the support roller, and the reciprocating motion of the table and the vertical motion equal to the head of the guide liner can be combined.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, at least three ball bearings are provided on a base installed in a horizontal position, so that a table mounted on these ball bearings can be moved in a horizontal direction. By providing two eccentric shafts connected to the output shaft of the motor arranged in the center of the base in an eccentric state and making these eccentric shafts rotatable with respect to the table, the table can be rotated around the output shaft. Can be caused to perform a circling operation. By such a rounding operation of the table, the ready-mixed concrete in the formwork mounted on the table repeatedly repeats along and hits the inner wall of the formwork. Can be compressed and pushed out of the ready-mixed concrete from the inner wall surface of the formwork to be eliminated. Moreover, the compaction of the ready-mixed concrete becomes possible by repeating the fluidization of the ready-mixed concrete in the formwork and the undulation of the ready-mixed concrete on the inner wall of the formwork.

When the table is provided with a wedge mounted on a ball bearing and inclined at the lower surface, the table can be swung up and down by the inclination of the wedge during the orbiting operation of the table. Therefore, the table is combined with the vertical movement in addition to the orbital movement, and the removal of surface bubbles and the compaction of ready-mixed concrete can be more reliably performed.

In the case where the base is mounted on a section steel which is arranged in a horizontal position, the base end of the base is connected to the section steel via a hinge, and the tip of the base and the section steel are connected by a tilting cylinder. By tilting the base, the formwork mounted on the table can also be tilted, so that in the case of a formwork having a core structure, air bubbles that easily accumulate under the core can be effectively eliminated.

A base end of a tilt angle adjusting plate mounted on a ball of the ball bearing is provided at the lower surface of the base so as to face the ball bearing so as to be rotatable in a vertical direction, and a tip end of the tilt angle adjusting plate is connected to the ball. With the cylinder connected to the cylinder that moves up and down, the vertical amplitude of the table can be changed by moving the tilt angle adjustment plate up and down with the cylinder. It can be set optimally.

In a configuration in which a concave guide liner provided on the lower surface of a table is mounted on a support roller rotatably disposed on a base and the table is reciprocated, the table is reciprocated simultaneously with the movement of the table. Up-and-down operation is enabled by the relationship between the supporting roller and the guide liner that is concave below.
That is, when the table is reciprocated, the table moves upward when the support rollers face both ends in the moving direction of the guide liner, and moves downward in the middle of the moving direction. Therefore, the table is a composite of the reciprocating operation and the elevating operation. Can be compacted.

[0016]

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

FIG. 1 is a front view of an apparatus for molding a secondary concrete product according to the present invention, FIG. 2 is a left side view, FIG. 3 is a plan view of a table and a formwork, and FIG. is there.

Referring to FIG. 1, a molding apparatus on which a mold 1 for molding is mounted includes a base 3 mounted on two mold steels 2a and 2b arranged on a work floor or a platen of a factory, and a base 3 mounted on the base.
And a table 4 on which the form 1 is mounted. The table 4 is mounted movably in the horizontal direction by balls 5a of ball bearings 5 arranged at four positions on the base 3.

A motor 6 is disposed on the lower surface of the base 3 and its output shaft 6a is connected to two eccentric shafts 7a and 7b. These eccentric shafts 7a and 7b are connected to a timing belt 7c.
The upper end is connected to the output shaft 6a and the upper end thereof is rotatably attached to the table 4.

In the above configuration, the production of a concrete secondary product using the formwork 1 is as follows.

First, the mold 1 is mounted on a table 4 and the mold 1 is fixed by a clamper (not shown) provided on the table 4. After this fixation, ready-mixed concrete is poured into the formwork 1 and the motor 6 is operated before it hardens. By the operation of the motor 6, the output shaft 6a rotates to drive the eccentric shafts 7a and 7b to rotate via the timing belt 7c. The rotation trajectories of the eccentric shafts 7a and 7b
Since the table 4 is eccentric with respect to a, the table 4 can be rotated around in the range shown by the broken line in FIG. Note that the table 4 reciprocates in the left-right direction as shown by the broken line in FIG. 1, and also reciprocates in the left-right direction in FIG. In such a circling operation of the table 4, the table 4 continuously circulates while being displaced in the left-right direction and the up-down direction as shown by the broken lines in FIG. That is, form 1
The ready-mixed concrete inside the table 4
In FIG. 3, the liquid is forcibly fluidized in the left and right and up and down directions, causing a large wave, and the liquid level of the ready-mixed concrete vibrates vertically. Therefore, the bubbles and the like contained in the ready-mixed concrete rise upward with the fluctuation of the liquid level, and the bubbles on the inner wall surface of the formwork 1 quickly become compressed while being compressed each time the liquid level of the ready-mixed concrete increases. Be eliminated.
In addition, since the ready-mixed concrete is compacted while repeatedly hitting the inner wall of the formwork 1, the surface of the product after release can be smoothed.

By moving the table 4 around as described above, the ready-mixed concrete can be compacted in the formwork 1 while being fluidized. Therefore, since there is no vibration or impact as in the related art, a quiet operation is possible.

FIG. 5 is a front view of a molding apparatus showing another embodiment, and FIG. 6 is a right side view of FIG. The same components as those in the previous example are designated by the same reference numerals, and detailed description thereof will be omitted.

In this example, a ball bearing 5 is provided on the lower surface of the table 4.
The wedge 4a mounted on the ball 5a is provided.
The wedge 4a has an inclined surface which is obliquely upward and rightward as shown in FIG.

Also in this configuration, the operation of the motor 6 causes the table 4 to circulate in a manner similar to that shown in FIG. When the table 4 comes to the leftmost position in FIG. 6 during this rotation, the wedge 4a is interposed, so that the level of the table 4 is highest, and when the table 4 moves rightward, the level is lowest. That is, the table 4 is displaced in the vertical direction in addition to the circling operation of the example shown in FIGS. Therefore, in addition to the forced fluidization of the ready-mixed concrete in the form 1 due to the orbiting operation of the table 4, the forced fluidization in the vertical direction is promoted. As described above, by the combination of the orbiting operation and the vertical operation, the ready-mixed concrete in the formwork 1 is quickly fluidized, and the compaction is promoted by the collision with the inner wall. Also in this configuration, since the table only repeats the revolving operation and the up-and-down operation by the motor 6, operation without generating noise is possible.

FIG. 7 is a front view of the embodiment shown in FIGS. 1 to 4 when a mechanism for tilting the base is provided, and FIG. 8 is a right side view.

In the drawing, one end of a base 3 is connected to a hinge 2.
As a result, it is connected to the shape steels 2a and 2b, and is configured to be rotatable up and down around the hinge 2c. A tilting cylinder 2d is disposed at a portion corresponding to the other end of the base 3. The tilting cylinder 2d supports one end of the base 3 and can tilt the base 3 in accordance with the amount of expansion and contraction of the rod 2e.

In such a configuration, the base 3 can be inclined upward to the right as shown in FIG. 7 by advancing the rod 2e of the cylinder 2d. Therefore, the table 4 connected to the base 3 also assumes an inclined posture, and the mold 1 mounted on the table 4 is also maintained in an inclined state. Then, the table 4 rotates in the same manner as in the example of FIG. 3, and at the same time as the circular operation, the mold 1 rotates in an oblique posture. Therefore, air bubbles generated in the ready-mixed concrete in the mold 1 can be eliminated, and compaction of the ready-mixed concrete can be performed well. Further, in the case of the mold 1 having a core structure for manufacturing a box culvert or the like, air bubbles easily accumulate on the lower side of the core, but by inclining the table 4, the air bubbles on the lower side of the core are quickly removed. be able to.

9 to 11 show examples in which the amplitude of the table in the vertical direction is variable. FIG. 9 is a front view, FIG. 10 is a right side view, and FIG. 11 is a plan view of a main part without the table. It is.

In the figure, as in the previous example, a pair of
A base 13 is fixed on 2a, 12b, and a table 14 on which the mold 1 is mounted is arranged above the base 13. The base 13 is provided with ball bearings 15 at four locations and a motor 16. An intermediate shaft 17a, 17b rotatably supported by bearings 13a, 13b fixed on the base 13 is connected to the output shaft of the motor 16. That is, the output shaft of the motor 16 is directly connected to the intermediate shaft 17a, and the intermediate shafts 17a and 17b can be synchronously rotated by the timing bell 18b wound around the intermediate shafts 17a and 17b and the pulley 18a rotatably disposed on the base 13. And The eccentric shafts 19a and 19b are connected to the upper ends of the intermediate shafts 17a and 17b, respectively.
9a and 19b are rotatably connected to the table 14 via collars.

On the lower surface of the table 14 facing the ball 15a of the ball bearing 15, a mechanism for varying the tilt angle of the table 14 is provided. As shown in FIG. 10, the tilt angle adjusting mechanism is rotatably mounted on a bracket 20 provided on the lower surface of the table 14, and is mounted on a ball 15a. And a cylinder 22 that lowers the tip side (the right end side in FIG. 10). Cylinder 22
Is arranged by abutting the rod 22a against the upper surface on the tip side of the inclination angle adjusting plate 21.
Is advanced, the tilt angle plate 21 can be rotated clockwise on the ball 15a.

With such a configuration, the moving gradient of the table 14 can be changed depending on the degree of advance of the rod 22a of the cylinder 22. In other words, the more the rod 22a advances, the closer the inclination angle adjustment plate 21 becomes to a horizontal posture, so that the moving gradient of the table 14 can be reduced. When the rod 22a is retracted, the inclination angle of the inclination angle adjustment plate 21 increases. The movement gradient of the table 14 can be increased.

The table 14 has two eccentric shafts 19a, 19
Since the table 14 is connected to the base 13 side by b, the table 14 can be circulated in the same manner as in the previous example. Consolidation is performed. Further, the table 14 is connected to the ball bearing 15 via the tilt angle adjusting plate 21.
Is mounted on the ball 15a, and moves up and down according to the gradient set by the tilt angle adjusting plate 21. Therefore, as in the examples of FIGS. 5 and 6, the form 1 can be made by combining the revolving operation and the up-and-down operation, and the compacting in the form 1 is promoted by promoting fluidization of the ready-mixed concrete. Can be. And, since the moving gradient of the table 14 can be changed by operating the cylinder 22, the vertical movement according to the shape of the formwork 1 and the viscosity of the ready-mixed concrete can be performed, and the compaction and the air bubbles on the concrete product surface can be performed. Can be efficiently eliminated.

FIGS. 12 and 13 show a structure in which the base is inclined in the molding apparatus shown in FIGS. Note that the same components as those in FIGS. 9 to 11 are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 12, the base 13 is connected to the shape steels 12a and 12b by a hinge 23 so that one end thereof is rotatable. A cylinder 24 is disposed on the other end side of the steel bars 12a and 12b, and the rod 24a of the cylinder 24 abuts against the lower surface of the base 13. Therefore, the rod 24
When a is advanced, the base 13 rotates counterclockwise around the hinge, and the base 13 can be held in an inclined posture. The direction of the tilt operation of the base 13 and the direction of the tilt of the table 14 by the tilt angle variable mechanism are orthogonal to each other.

In this configuration, the posture of the mold 1 can be obtained by combining the inclination of the base 13 due to the advance of the rod 24a of the cylinder 24 and the inclination of the table 14 by the inclination angle varying mechanism. The compaction of fresh concrete and the elimination of air bubbles can be performed efficiently by combining the operation and the tilting operation.

FIG. 14 is a schematic view of a molding apparatus showing another configuration example.

In this example, a support roller 32 is rotatably arranged on the upper surface of the base 31 with a space between the respective rotation axes, and a table 33 is mounted on the support roller 32. The mold 1 is mounted on the table 33, and a guide liner 33a that rides on the support roller 32 is provided on the lower surface thereof. The lower surface of the guide liner 33a is formed so that the stroke end portion has an arcuate shape and a concave surface shape. Also, the table 33
Is connected via a link rod 35 to a wheel 34 driven to rotate by a motor (not shown),
The table 33 reciprocates in the left-right direction by the rotation of the table 4 in one direction.

The guide liner 33a has an arcuate shape at both left and right ends and a concave shape with a flat middle surface, and as shown in FIG. The relationship is such that the liner 33a is located in the middle of the moving direction.

In the molding apparatus having such a configuration, when the motor (not shown) is driven to rotate the wheel 34 counterclockwise from the state shown in FIG.
5 operates in the direction to move the base 13 to the left. At this time, the guide liner 33a, which is recessed downward, also rolls on the support roller 32 while moving to the left at the same time, and the guide liner 33a is displaced downward near the stroke end. It is lifted up as shown in FIG. When the wheel 34 further rotates, the guide liner 33a returns to the state shown in FIG. 7A and descends. When the wheel 34 further rotates, the stroke reaches the stroke end as shown in FIG. The liner 33a rises. As described above, in addition to the reciprocating operation of the table 33, the up and down operation is repeated twice in one reciprocation. That is, the table 33 moves around so as to draw a locus similar to the surface profile of the guide liner 33a due to the vertical displacement due to the concave surface below the guide liner 33a and the horizontal reciprocating operation. Table 3 like this
By the movement of 3, the form 1 mounted on the form 3 also swings, and the compaction of the ready-mixed concrete poured therein is promoted. Further, since the guide liner 33a only moves on the support roller 32, a quiet operation is possible without generating any vibration or impact.

[0041]

According to the first aspect of the present invention, the table can be caused to rotate around the output shaft of the motor, so that the ready-mixed concrete in the mold mounted on the table can be moved along the inner wall of the table. Collisions and the like can be repeated, so that bubbles can be compressed and eliminated, and compaction of ready-mixed concrete becomes possible. Accordingly, the ready-mixed concrete can be compacted only by the orbiting operation of the table without giving a vibration or an impact to the inner frame as in the related art, so that quiet operation can be performed without generating noise.

According to the second aspect of the present invention, the table can be swung up and down by the inclination of the wedge during the orbiting operation of the table. Of air bubbles and compaction of ready-mixed concrete can be performed more reliably.

According to the third aspect of the present invention, the mold mounted on the table can be inclined by tilting the base, so that in the case of a mold having a core structure, bubbles which easily accumulate under the core can be effectively removed. Can be eliminated.

According to the fourth aspect of the present invention, the vertical amplitude of the table can be changed by moving the tilt angle adjusting plate up and down by the cylinder, so that the vertical swing can be optimized according to the fluidity of the ready-mixed concrete. Can be set to

According to the fifth aspect of the present invention, the table can be moved up and down by the relationship between the support roller and the guide liner which is recessed downward simultaneously with the movement of the table. The ready-mixed concrete in the formwork mounted on the table can be made to undulate in the formwork and collide with the inner wall of the formwork, thereby enabling compaction of the ready-mixed concrete. In addition, since the guide liner only rolls on the support roller, the generation of noise can be suppressed as compared with the conventional case where vibration or impact is applied.

[Brief description of the drawings]

FIG. 1 is a front view showing an apparatus for forming a secondary concrete product of the present invention.

FIG. 2 is a left side view of FIG.

FIG. 3 is a plan view showing a table and a mold.

FIG. 4 is a plan view of a main part excluding a table.

FIG. 5 is a front view of a molding apparatus showing an example in which a wedge is provided under a table.

6 is a right side view of FIG.

FIG. 7 is a front view of a molding apparatus including a mechanism for tilting a base.

8 is a right side view of FIG.

FIG. 9 is a front view showing an example in which the vertical amplitude of the table is variable.

FIG. 10 is a right side view of FIG. 9;

FIG. 11 is a plan view of a main part excluding a table.

FIG. 12 is a front view showing an example in which the base is inclined in the molding apparatus of FIGS. 9 to 11;

FIG. 13 is a right side view of FIG.

FIG. 14 is a schematic diagram showing an example in which a support roller is arranged on a base and a guide liner provided on a table is mounted on the support roller to enable a reciprocating operation and an up-down movement.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Formwork 2a, 2b Type steel 3 Base 4 Table 4a Wedge 5 Ball bearing 5a Ball 6 Motor 6a Output shaft 7a, 7b Eccentric shaft 7c Timing belt 12a, 12b Type steel 13 Base 13a, 13b Bearing 14 Table 15 Ball bearing 15a Ball 16 Motor 17a, 17b Intermediate shaft 18a Pulley 18b Timing belt 19a, 19b Eccentric shaft 20 Bracket 21 Inclination angle adjustment plate 22 Cylinder 22a Rod 23 Hinge 24 Cylinder 24a Rod 31 Base 32 Support roller 33 Table 33a Guide liner 34 Wheel 35 Link rod

Claims (5)

[Claims] 1. A base installed in a horizontal position, at least three ball bearings arranged on the base, a table supported by the ball bearings and capable of mounting a formwork on an upper surface, and arranged at the center of the base. Motor, and two eccentric shafts that are eccentrically connected to the output shaft of the motor, and the eccentric shaft is rotatably connected to the table so that the table is rotated when the motor is operated. An apparatus for forming a secondary concrete product, which is capable of orbiting around an output shaft. 2. An apparatus for molding a secondary concrete product according to claim 1, wherein a wedge mounted on said ball bearing and having a lower surface is provided on a lower surface of said table. 3. The base for mounting the base on a steel die arranged in a horizontal position, connecting the base end of the base to the steel die via a hinge, and tilting the tip between the base and the steel die. 3. The apparatus for forming a secondary concrete product according to claim 1, wherein the cylinders are connected by a cylinder. 4. A base end of a tilt angle adjusting plate mounted on the ball bearing is provided on a lower surface of the base and opposed to the ball bearing so as to be vertically rotatable, and the tilt angle is adjusted. 4. The method according to claim 1, wherein the end of the plate is connected to a cylinder for vertically moving the plate.
A device for forming a secondary concrete product according to any one of the above. 5. At least two support rollers rotatably arranged on a base are arranged at an interval between their respective axes, and are reciprocally movable in the direction in which the support rollers are arranged and can be moved up and down. A table with a molding table mounted on the table, a guide liner having a concave bottom on the lower surface of the table, and the guide liner mounted on the support roller; And a vertical movement equal to the head of the guide liner.