JP3074268B2 - Concrete secondary product molding equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to molding of a secondary concrete product for molding, for example, a U-shaped groove or a box culvert, and more particularly, to a quiet movement of a formwork for efficiently promoting compaction of ready-mixed concrete. The present invention relates to a concrete secondary product forming device that can be realized by operation.

[0002]

2. Description of the Related Art Secondary concrete products such as U-shaped grooves and box culverts used for civil engineering work are prepared by setting a reinforcing bar in a formwork, placing ready-mixed concrete, and releasing after a curing period. can get. In the production of such a secondary concrete product, compaction after placing of ready-mixed concrete is very important. The main purpose of this compaction is to spread the ready-mixed concrete throughout the inside of the formwork and to make the packing density uniform, but to prevent the concentration of coarse aggregate around the rebar, It is said to be effective for bleeding air mixed during casting.

[0003] The compaction in the molding of ready-mixed concrete is basically performed by forcibly fluidizing the ready-mixed concrete by applying vibration to a formwork. For example, a form is mounted on a table that vibrates at low frequency by a vibration generator to apply vibration to the ready-mixed concrete in the form, or a form generator itself is provided with a vibration generator to apply high-frequency vibration. Is known from the prior art.

[0004]

However, when low-frequency vibration or high-frequency vibration is applied to a mold, a large noise is generated, and the working environment is deteriorated and the noise damage to the periphery of the factory cannot be ignored.

[0005] On the other hand, there have already been proposed many molding apparatuses for suppressing noise when vibration is applied, and for example, there is one disclosed in Japanese Patent Application Laid-Open No. 10-100118. In this method, a formwork with wheels on its lower surface is incorporated so that it can move in a container-like truck, and the truck itself supports the center lower surface with one fulcrum and connects a cylinder for swinging operation. It was done. In such a configuration, in addition to turning and swinging around the fulcrum of the bogie, the form itself moves around in the bogie, so that vibration can be applied to the ready-mixed concrete in the form, and low-frequency and high-frequency Compared to the case where a vibration generator is used, noise under a vibration load can be reduced.

However, in order to promote compaction of the ready-mixed concrete, an operation of colliding the form with the inner wall of the bogie is required, and this collision noise is a source of new noise. In other words, since only the whirling of the movement of the form itself causes insufficient compaction, an intermittent impact must be applied, and the generation of noise is inevitable.

In addition, as compared with the conventional structure in which only vibration is applied to the form, the carriage for housing the form is arranged on the fulcrum and connected to the cylinder, which complicates the device configuration and causes the cylinder to swing. It is very difficult to perform optimal control for the concrete control considering the viscosity of ready-mixed concrete. And, when the fresh concrete is cast, the whole becomes heavy. Therefore, there is a problem in terms of durability in the configuration in which the bogie is supported by one fulcrum.

An object of the present invention is to provide a molding apparatus for a concrete secondary product which has a simple structure, high rigidity and excellent durability, while suppressing the generation of noise in the compacting step of fresh concrete. It is in.

[0009]

According to the present invention, there is provided an apparatus for forming a secondary concrete product, comprising: a bogie having a forming frame mounted thereon and driven reciprocally; and a wheel mounted on the bogie having a reciprocating direction. A guide rail that guides the wheels, the connecting points between the wheels and the guide rails are spaced at least two places in the reciprocating direction of the bogie, and the tread surface of the guide rail on which the wheels are mounted is projected downward or With a curved surface convex upward,
The vertical movement equal to the head of the guide rail can be combined with the reciprocating stroke of the bogie.

[0010] In such a molding apparatus,
It is also possible to provide a swivel table which mounts and holds a formwork and swings in a substantially horizontal plane.

In the case where a turning table is provided, a turning drive mechanism for turning the turning table is provided on the bogie.
The drive by the drive mechanism for reciprocating the carriage and the drive by the turning drive mechanism may be configured to be combined and controllable.

[0012]

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

FIG. 1 is a schematic exploded perspective view of a concrete secondary product molding apparatus according to an embodiment, FIG. 2 is a schematic side view showing a main part partially cut away, and FIG. It is a front view.

In FIG. 1, a molding apparatus on which a mold 1 for molding is mounted includes a base 2, which is installed horizontally on a work floor or a surface plate of a factory, a cart 3, which reciprocates on the base 2, A turning table 4 that turns on the cart 3
Is the main element.

The base 2 is formed of a steel material and is formed in a rectangular frame shape in plan view, and is provided with a drive unit mount 2a having a reduced height at one end in the long side direction, and the mount 2a is mounted on the mount 2a. The drive motor 5 is mounted. The drive motor 5 has a large output, for example, with a speed reduction mechanism. The output shaft has a disk 5a fixed thereto and a connecting rod 5b connected to the disk 5a. The connecting rod 5b is rotatably connected to a position near the outer peripheral edge of the disk 5a, so that the rotational movement of the disk 5a is converted into a reciprocating linear movement of the connecting rod 5b.

On the upper surface of the long side of the base 2, 2
Each guide rail 6 is provided. This guide rail 6
As shown in FIG. 2, a tread surface 6a having a concave arcuate surface and a restraining guide 6b for preventing derailing which is raised from both ends sandwiching the tread surface 6a are provided. Tread 6a is about 500
A curved surface included in an arc having a radius of about mm or less is formed. Line segments A and B (see FIG. 1) connecting the centers of the tread surfaces 6a of the respective guide rails 6 provided on different long sides of the base 2 have a relationship orthogonal to the reciprocating motion direction of the connecting rod 5b. To do.

A wheel 3a that rolls on the tread surface 6a of the guide rail 6 is provided on the bottom side of the truck 3. This wheel 3
a is fixed to a support shaft 3b rotatably supported by a bearing 3c, and as shown in FIG.
Is substantially the same as the width of the tread surface 6a of FIG. In order to reduce the resistance when the wheel 3a slides on the restraining guide 6b when rotating, it is preferable that the side surface of the wheel 3a and the restraining guide 6b are made of metal having a low coefficient of friction. Further, a bracket 3 for connecting the connecting rod 5b is provided on the bottom of the carriage 3.
d is provided. The bracket 3d connects the connecting rod 5b so as to be rotatable in the vertical direction. When the disk 5a rotates, the bracket 3d reciprocates while swinging the connecting rod 5b up and down.

The swivel table 4 has a plurality of clampers 4a on its upper surface for restraining and fixing the outer wall of the frame 1 and a liner 4b mounted on the surface of the carriage 3 and sliding on its bottom surface. And a support shaft 4c coaxially arranged. The clamper 4a is connected to the swivel table 4 so that the position of the clamper 4a can be changed from the center toward the outside from the center, and a predetermined position adjusted to the size of the mold 1 by a locking bolt (not shown). Can be fixed.

The support shaft 4c is inserted into the carriage 3, and a gear train 7 is connected to a turning motor 7 provided on the carriage 3.
The turning table 4 is rotated at a predetermined speed around the support shaft 4c by the driving of the turning motor 7 by the rotation of the turning table 4a.
The drive motor 5 and the turning motor 7 are controlled by a controller (not shown) so that they are simultaneously operated or intermittently driven, so that the reciprocating operation of the carriage 3 and the turning table 4 are performed.
It is possible to perform an operation in which various rotation operations are combined.

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

First, the mold 1 is placed on the turntable 4 and fixed with the clamper 4a. At this time, the mold 1 varies depending on the product to be manufactured. However, if the clamper 4a is moved and fixed with a locking bolt, it can be used for various molds 1. After setting the form 1 on the turning table 4, ready-mixed concrete is injected, and before the concrete is hardened, the drive motor 5 and the turning motor 7 are operated.

The operation of the drive motor 5 causes the disk 5a
Rotates in the direction of the arrow in FIG. 2, and the carriage 3 reciprocates by the reciprocating mechanism formed by the connecting rod 5b connected to the disk 5a. FIG. 5 is a schematic diagram showing the operation of the cart 3, and FIG. 5A corresponds to the initial state of FIG. In this initial state, the wheels 3a of the bogie 3 are stopped at the center and the lowest part of the tread surface 6a of the guide rail 6, and the form 1 is at the lowest level.
Then, the connecting rod 5b is pulled to the left by the rotation of the disk 5a, and the carriage 3 also moves to the left as shown in FIG. 5B. At this time, the wheel 3a rolls upward on the arc surface of the tread surface 6a, and when the disc 5a rotates counterclockwise by 90 ° from its initial state, the connecting rod 5b reaches its stroke end to the left.

When the disk 5a further rotates counterclockwise by 90 °, the connecting point of the connecting rod 5b becomes the lowest position, and during this rotation, the carriage 3 moves from the state of FIG. 5B to the state of FIG. Return to the initial position. Then, when the disk 5a further rotates counterclockwise by 90 °, the connecting rod 5b moves rightward and moves the carriage 3 to the position shown in FIG. 5C. Thereafter, the carriage 3 repeats a reciprocating motion on the base 2 by the rotation of the disk 5a.

In such a reciprocating motion of the carriage 3, the wheels 3a roll on the concave curved tread surface 6a of the guide rail 6, so that the truck 3 moves up and down according to the gradient of the tread surface 6a. That is,
The bogie 3 moves around in a locus similar to the surface profile of the tread 6a, that is, in an arc due to the vertical displacement of the tread 6a by the concave curved surface and the horizontal reciprocation. By making the distance between the axes of the wheels 3a equal to the distance between the line segments A and B shown in FIG.
The level of the contact point with respect to the tread surface 6a can be made the same. Therefore, even if the bogie 3 itself is displaced up and down, its posture does not tilt, and the bogie 3 operates so as to be the lowest at the middle position in the reciprocating direction and the highest at the stroke end. Such movement of the carriage 3 also swings the formwork 1 mounted thereon, and promotes compaction of the ready-mixed concrete poured therein.

That is, the ready-mixed concrete in the form 1 is
Due to the vertical movement of the carriage 3 with the circular movement, the fluid is forcibly fluidized in the vertical direction at the end of the form 1 in the reciprocating direction, causing a large wave, and the liquid level of the ready-mixed concrete fluctuates vertically. . Therefore, air bubbles and the like contained in the ready-mixed concrete go up with the fluctuation of the liquid level and are quickly removed while being compressed each time the liquid level of the ready-mixed concrete increases. In addition, ready-mixed concrete forms 1
Since the compacted product is compacted while repeatedly hitting the inner surface of the molded product, the surface of the molded product after the mold release can be smoothed.

Here, the bogie 3 only performs reciprocating motion combining vertical displacements. To promote compaction, for example, a formwork such as a device disclosed in Japanese Patent Application Laid-Open No. 10-100118 described in the prior art is used. No impact is given to 1. For this reason, it seems at first glance that the compaction remains weak and the coarse aggregate concentrates around the rebar. However, since the bogie 3 repeats not only a reciprocating motion but also a synthetic motion including a vertical displacement at a constant cycle, it causes a forcible shaking motion of the ready-mixed concrete in the formwork 1. The rocking motion is stabilized so as to match the movement of the formwork 1 due to the viscosity of the ready-mixed concrete, and the ready-mixed concrete in the formwork 1 is moved from the bottom of the formwork 1 to the side wall in the reciprocating motion direction. Flow is promoted. Therefore, the ready-mixed concrete in the mold 1 can be sufficiently compacted without giving an impact to the carriage 3, and operation without generating noise can be realized.

On the other hand, since the turning table 4 can be turned by the turning motor 7, for example, when the plane shape of the mold 1 is a quadrangle, the compacting is continued as the posture of FIG. When the swivel table 4 is rotated by 90 °, the form 1 can be shaken in two directions. Therefore, compaction of ready-mixed concrete is promoted over the entire form 1.

If the turning table 4 is continuously rotated by the turning motor 7 simultaneously with the reciprocating movement of the carriage 3 by the drive motor 5, the form 1 swings while rotating. Therefore, in addition to the reciprocating motion and the swinging of the vertical displacement, a rotational motion is applied to the formwork 1 to further promote the fluidity of the ready-mixed concrete inside, and more effective compaction can be obtained. And if it includes such a rotational movement, even if the molded article by the formwork 1 has a specific direction, sufficient compaction can be realized by promoting fluidization of the ready-mixed concrete. .

FIG. 6 is a schematic diagram of an example in which the tread surface of the guide rail is a curved surface that is convex upward, and the same components as those described above are designated by common reference numerals.

Guide rail 8 provided on the upper surface of base 2
In contrast to the previous example, a tread surface 8a having a curved surface convex upward is formed, and a pair of restraining guides 8b are provided at both ends thereof. In the case of such a guide rail 8, when the bogie 3 is at an intermediate position of the reciprocating motion, it is at the highest level as shown in FIG. ) Is the lowest level. In other words, the carriage 3 is kept on the tread 8a while maintaining the horizontal posture.
Oscillating motion that draws a locus similar to the surface profile of.

Even in the case where the guide rail 8 having such an upwardly convex curved tread surface 8a is provided, the fluidization of the ready-mixed concrete in the formwork 1 can be promoted by reciprocating motion and vertical combination. In particular, at the end of the stroke, the switching from the descending operation to the upward operation is performed at once.
Because the forced fluidization is possible near the bottom and side wall of the
A more efficient compaction is obtained.

As described above, as long as the bogie 3 is displaced in the vertical direction, whether the concave tread surface 6a or the convex tread surface 8a is displaced in the vertical direction, the ready-mixed concrete in the formwork 1 is combined with the reciprocating motion of the bogie 3. Good compaction is possible. In addition,
The shape of the treads 6a, 8a may be an ellipse or an ellipse as well as an arc surface.

[0033]

According to the first aspect of the present invention, the vertical displacement motion is synthesized while the bogie is reciprocated and can be moved in a state similar to a circular motion like a cradle, so that the ready-mixed concrete in the formwork is forcibly fluidized. At the same time, the swinging direction is suddenly reversed at the throat end of the reciprocating motion, and compaction of the ready-mixed concrete can be more effectively performed. In addition, the bogie does not generate noise because its wheels only roll on the guide rails.

According to the second aspect of the present invention, the posture of the mold can be freely changed with respect to the reciprocating direction of the bogie by rotating the swivel table, and compacting of the ready-mixed concrete according to the shape of the mold and the product. Is more efficiently achieved.

According to the third aspect of the present invention, the reciprocating motion of the bogie and the swiveling operation of the swivel table can be executed simultaneously, so that the direction of the cradle motion with respect to the mold can be provided in all directions, and the form and the product can be manufactured. Even if the shape is complicated, the concentration of the coarse aggregate on the reinforcing steel material can be suppressed, and more effective compaction of ready-mixed concrete can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic exploded perspective view of a concrete secondary product forming apparatus according to an embodiment of the present invention.

FIG. 2 is a front view of the molding apparatus with a part cut away.

FIG. 3 is a right side view of FIG. 2 without a mold.

FIG. 4 is a longitudinal sectional view showing a main part of a guide rail and wheels.

FIG. 5 is a schematic diagram showing a combination of a reciprocating motion of the bogie and a motion due to a vertical displacement.

FIG. 6 is a schematic diagram showing the swinging motion of the bogie when the tread surface of the guide rail is formed into a curved surface that is convex upward.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Form frame 2 Base 2a Mount 3 Cart 3a Wheel 3b Support shaft 3c Bearing 3d Bracket 4 Revolving table 4a Clamper 4b Liner 4c Support shaft 5 Drive motor 5a Disk 5b Connecting rod 6 Guide rail 6a Tread surface 6b Restraining guide 7 Rotating motor 7 Rotating motor Row 8 Guide rail 8a Tread surface 8b Restraint guide

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Utility model registration 3053129 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B28B 1/00-1/54

Claims (3)

(57) [Claims] 1. A reciprocatingly driven carriage having a molding frame mounted thereon, and a guide rail on which the wheels of the carriage are mounted and guided in a reciprocating direction thereof. At least two or more continuous contact points are spaced in the reciprocating direction of the bogie, and the tread surface of the guide rail on which the wheels are mounted has a downwardly convex or upwardly convex curved surface, and the reciprocating stroke of the bogie includes: An apparatus for forming a secondary concrete product, capable of synthesizing a vertical movement equal to the head of the guide rail. 2. The concrete secondary product forming apparatus according to claim 1, further comprising a swivel table mounted on and held by the bogie, and swiveling in a substantially horizontal plane. 3. The concrete container according to claim 2, wherein a turning drive mechanism for turning and driving the turning table is provided on the bogie, and the driving by the driving mechanism for reciprocating the bogie and the driving by the turning drive mechanism can be combined and controlled. Next product molding equipment.