JPH106325A - Manufacturing apparatus for running type cavity concrete precast panel and use thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus enhancing the surface density of a concrete panel without crushing the cavity of the concrete panel when a large number of cavities are molded on the surface of the concrete panel during molding and capable of successively and accurately forming the shapes of cavity molding projections on the surface of the concrete panel without cutting off cavity shoulder parts. SOLUTION: A plurality of cavity molding cores 15 are provided to the moving stand 11 running on a molding bed 10 so as to move along the moving stand and ready-mixed concrete is supplied to the parts of the cavity molding cores 15 and compacted from above. The underside flat part of a caterpillar 42 having projections is successively pressed to the surface C of concrete at the region above the leading end side where the cavity molding core 15 is provided and the latter half of the caterpillar is successively peeled from the surface C of concrete to form cavities on the surfaces of a cavity precast concrete panel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for manufacturing a cavity precast concrete plate, and more particularly, to a cavity having a plurality of shacotter cavities on the surface thereof for strengthening bonding with cast-in-place concrete. The present invention relates to a device for producing a precast concrete plate and a method for producing a cavity precast concrete plate using the device.

[0002]

2. Description of the Related Art As a conventional apparatus of this type, Japanese Patent Publication No. Sho 6
It is known from Japanese Patent Application Publication No. 2-42766, and its outline is to provide a movable platform which is laid on a long concrete molding bed and is movable along this longitudinal direction. A pair of left and right upright slip forming walls that are in sliding contact with each other are provided, and a plurality of cavity forming cores parallel to the forming bed surface, separated from the bed surface, and extending in the longitudinal direction are respectively provided on the movable base. A cantilevered support, and the movable table is further supplied with kneaded ready-mixed concrete on the forming bed without the cavity forming cores further upstream than the support portion of each cavity forming core. A hopper and a second hopper for supplying the ready-mixed concrete are provided above each of the cavity forming cores, and above the tip of the cavity forming core above the second hopper, these support portions are provided. Yo This is a traveling-type cavity precast concrete plate manufacturing device in which a concrete compaction device is provided in the tip direction, and in particular, a device in which a number of depressions are provided on the surface of a concrete plate is used as a concrete after the cavity molding cores have come off. 2. Description of the Related Art There is known an apparatus in which a dent forming roller having a large number of projections radially projecting from a surface of a plate is in rolling contact with the surface of the plate to form a large number of dents on the surface of a concrete plate by the radial projections.

However, in the prior art, as described above, the depression forming roller is pressed against the surface of the concrete plate after each of the cavity forming cores comes off. There is a risk of crushing the cavity just formed, and the rotation of the roller causes the shoulder of the dent to be kicked up by each of the protrusions, and the concrete structure of each shoulder of the dent tends to become coarse, During transportation of the concrete product, the concrete plate may be cracked from this part. Also, the bonding strength with the cast-in-place concrete layer cast on the upper surface during construction may be reduced.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a method for forming a large number of depressions on the surface of a hollow precast concrete plate during molding without crushing the cavity of the cavity precast concrete plate. And a cavity precast using this device, in which the density of the surface is not roughened and the shoulders of the pits are not shaved off, and the shapes of the projections for forming the cavities can be sequentially and accurately transferred to the surface of the cavity precast concrete plate. Provide concrete plate manufacturing method to market.

[0005]

In order to achieve the above-mentioned object, the present invention provides a long concrete bed and a movable table which is laid on the bed and movable along the longitudinal direction. The movable table is provided with a pair of left and right upright slip forming walls that are in sliding contact with both sides of the forming bed, and is parallel to the forming bed surface, is separated from the bed surface, and extends in the longitudinal direction. A plurality of cavity forming cores extending in a cantilever manner are respectively supported on the moving table, and the moving table is further provided with at least one unit for supplying concrete kneaded on the forming bed and on each of the cavity forming cores. A traveling cavity pre-press having a hopper, and at least one concrete consolidation device is provided above the hopper near the tip of the cavity forming core in a tip direction from the support portion side. In the apparatus for producing a concrete panel, the front side of each cavity forming core is further than the consolidation apparatus, and the upper side of each cavity forming core is in the front-rear direction of the moving table, and the lower side is An endless belt or a caterpillar provided with a linear portion parallel to the forming bed is provided, and a dent forming device provided with a plurality of protrusions on an outer peripheral surface of the endless belt or the caterpillar is provided. Traveling type cavity precast concrete plate manufacturing equipment.

In order to achieve the above object, in the traveling cavity precast concrete plate manufacturing apparatus of the present invention, the endless belt or the caterpillar is provided at a position near the root of the cavity forming core at the front end at a lower position. The straight portion of the endless belt or chain is provided with a gradient so that the protrusion is pressed into the concrete surface and the depth decreases toward the tip end of the cavity forming core. Preferably, it is characterized by the following.

In order to achieve the above object, the endless belt or the caterpillar of the traveling cavity precast concrete plate manufacturing apparatus of the present invention is provided with a cotter bar having an arbitrary shape for each of a predetermined pair of right and left endless chain elements. It is preferable that both ends are caterpillars fixed in a direction transverse to the moving direction of the endless chain.

In order to achieve the above object, all of the cavity forming cores of the traveling type cavity precast concrete plate manufacturing apparatus of the present invention are designed such that each of the cavity forming cores moves while the moving table moves in the forming direction. It is preferable that the movable stage is equipped with a reciprocating vibration in the axial direction of the body forming core.

In order to achieve the above object, the compacting device of the traveling type cavity precast concrete plate manufacturing apparatus of the present invention is provided with a pushing device and a surface vibrating device which are sequentially provided from the front to the rear. The pushing device is a device for moving the pressing member up and down by means of a vertical reciprocating drive means at a position above each of the plurality of cavity forming cores, and the surface vibrating device is a leveling plate which comes into contact with the ready-mixed concrete surface. Preferably, the device is a device that reciprocates vertically.

In order to achieve the above object, the present invention uses the apparatus according to any one of the first, second, third, fourth and fifth aspects of the present invention, and uses the apparatus according to the first or second aspect of the present invention. While moving the moving table in the forming direction, between the upright slip forming walls fixing the ready-mixed concrete from the two hoppers to the moving table, and at the top of the bed and each cavity forming core. The raw concrete supplied and pressed from above each of the cavity molding cores is compacted between the molding bed and each of the cavity molding cores and between each of the cavity molding cores. Form a ready-mixed concrete layer to a predetermined thickness on the molding core,

An endless belt provided with a straight portion in the front-rear direction of the moving table on the upper surface of the ready-mixed concrete layer at a position where each of the cavity forming cores is located, or a projection for forming a dent formed on the outer peripheral surface of the caterpillar is sequentially formed. The endless belt or caterpillar is moved at the same speed with respect to the moving table by pressing, and these projections are temporarily retained on the concrete surface, and with the movement of the moving table, the respective projections are sequentially moved from the concrete surface. ,
A method of using a traveling-type cavity precast concrete plate-making apparatus, wherein a cavity precast concrete is manufactured by sequentially pulling out vertically in the same posture and sequentially forming grooves or depressions in the concrete surface.

According to the first aspect of the present invention, with the hopper at the top,
The moving table is moved to one end of the forming bed, and if necessary, a plurality of PC steel strands are stretched in the longitudinal direction of the forming bed by applying a predetermined tensile force to the forming bed. The second hopper is supplied with ready-mixed concrete and all of the equipment is operated.

First, the moving table is slowly moved to the opposite end of the forming bed, and with this movement, ready-mixed concrete is supplied directly from the hopper onto the forming bed and onto the plurality of cavity forming cores. With the movement of the raw concrete, the supplied ready-mixed concrete is supplied to the top and bottom of the cavity forming core, between the cavity forming cores, and between the cavity forming cores on both sides and the upright slip forming wall of the moving table, and further, the concrete consolidation device The parts are consolidated.

When the moving table further moves, the endless belt or caterpillar moves at the same speed as the moving table.
Each projection for forming a dent on the upper surface of the compacted raw concrete is pressed into the upper surface of the ready-mixed concrete sequentially, and each protrusion stays in place with respect to the ready-mixed concrete, with the movement of the moving table, Each projection comes off the ready-mixed concrete surface, and then moves to the upper side of the endless belt or caterpillar.

Therefore, when each projection comes off from the ready-mixed concrete surface, each projection serves to form a depression in which the shape of each projection is transferred to the ready-mixed concrete surface. In addition, at the position where each projection is pressed, since it is the concrete surface of a portion where each cavity forming core is located, the cavity does not crush.

When the moving table is further moved, all the cavity forming cores are completely removed from the concrete on the forming bed, the formed concrete remains on the forming bed in order, and thereafter the moving table is moved to a predetermined position to form the concrete. Obtain a concrete plate of the desired length on the bed. Then, after curing the concrete molded product by an appropriate method, it is cut into a desired size to obtain a cavity precast concrete plate.

According to the second aspect of the present invention, in addition to the above operation, the endless belt or the caterpillar is pushed into the concrete layer at the lower straight portion at the front end portion and is deeply pushed into the concrete layer. Since each projection is gradually and shallower than concrete at the same position, it functions to form a depression on the concrete surface where the shape of each projection is accurately transferred. In particular, each projection serves to kick up the shoulder portion of the depression, break the shoulder portion, and reduce the density of this portion.

According to a third aspect of the present invention, in addition to the function of the first or second aspect of the present invention, the endless belt or the caterpillar is provided with a pair of left and right endless chains. Since the cotter bar provided with each protrusion is fixed to both ends of each of the arbitrary number of constituent chain elements, a depression is reliably formed on the fresh concrete surface.

According to a fourth aspect of the present invention, in addition to the effects of the first, second or third aspect of the present invention,
Since each cavity forming core reciprocates in the axial direction while the moving table is moving, friction between the outer peripheral surface of each cavity forming core and the inner peripheral surface of each concrete cavity is cut, and the moving table moves. While the resistance is reduced, the inner peripheral surfaces of the respective cavities are smoothed, and in the subsequent steps, the inner peripheral surfaces are not collapsed, and the respective inner peripheral surfaces of the cavities can be finally formed firmly. Works.

According to a fifth aspect of the present invention, in addition to the operation of the first, second, third or fourth aspect of the present invention, after the pressing device, the concrete surface is vibrated by a surface vibrating device. Becomes smooth and dense, and the dents are formed by the dent forming device, so the concrete at the shoulders of each dent becomes dense, durable dents are formed in sequence, and even when it becomes a hollow concrete plate In addition, the density of the concrete around the depression is not coarser than that of the others, and the bonding of the concrete and the concrete cast on the concrete is strong, so that a product can be manufactured.

According to the sixth aspect of the present invention, the shape of the shoulder portion of the groove or the dent on the surface is not collapsed, the density is not coarse, and the groove or the dent having the accurate shape can be formed without the cavity being crushed. A cavity precast concrete plate formed on the surface is manufactured.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment of the Invention
In the drawings, reference numeral 10 denotes a molded bed, which is usually made of steel and has a length of about 150 m. Numeral 11 denotes a movable table which is mounted on the bed so as to be able to reciprocate in the longitudinal direction of the bed 10 and is usually pulled and moved by a winch provided at one end of the bed 10. Alternatively, a power source is mounted on the moving table 11 itself, and the moving table 11 is of a self-propelled type. This mobile platform 1
The lower end edges of a pair of right and left upright slip forming walls 12 in the longitudinal direction of the forming bed 10 on both sides of the unit 1 are slid on the forming bed 10.

The movable table 11 is parallel to the surface of the concrete forming bed 10 and separated from the surface of the bed 10.
A plurality of cavity forming cores 15 extending in the longitudinal direction are cantilevered on the moving table 11 respectively, and the support portions 1
Reference numeral 6 denotes a movable table 11 supported by a movable table 11 via a parallel link mechanism 17 so as to be able to reciprocate in the front-rear direction with respect to the movable table 11.
Is extended rearward with reference to the moving direction at the time of molding. A vibration device (not shown) such as an eccentric wheel is connected to each of the cavity molding cores 15 so as to vibrate each cavity molding core 15 back and forth.

A receiving hopper 20 for receiving a large kneaded ready-mixed concrete is provided on the upper portion of the moving table 11, and the lower portion is divided into front and rear portions of the moving table 11. The first hopper 23 and the second hopper 24 provided at the upper part of the hopper 23 face the upper part. At the bottom of the receiving hopper, there are respective distribution ports 21 and 22
Are provided with feeders 25 and 26 for feeding ready-mixed concrete. This feeder may be a belt conveyor or a screw conveyor, but is shown as a belt conveyor.

The first hopper 23 is provided at a position where the ready-mixed concrete can be directly supplied onto the forming bed at the front portion of the movable table 11 where the cavity forming core 15 is not provided. It is provided at a position where the ready-mixed concrete is supplied above the vicinity of the support portion of the cavity forming core 15 of the book.

Further, the movable table 11 is provided above the free ends (tips) 18 of the plurality of cavity forming cores 15 from the second hopper 24 in the direction of the free ends from the support portion 17 side. Two concrete compacting devices 30 are provided, and each of the compacting devices is provided with a pushing device 31 and a surface vibrating device 35, which are one type of the compacting devices, sequentially from the front to the rear.

The pushing device 31 is a device for moving the pressing member 32 up and down by the vertical reciprocating drive means 33 at a position above each of the plurality of cavity forming cores 15, and uses a reciprocating drive means 33 such as a crank. The surface vibrating device 35 is a leveling plate 36 that comes into contact with the concrete surface that has been cast.
Is a device vibrated by the reciprocating vibration means 37 in the front-rear direction and the vertical direction. As the reciprocating vibration means 37, for example, an eccentric ring is used.

The pressing member 32 extends in the transverse direction of the forming bed 10, and both ends of the pressing member 32 have a bar shape having an arbitrary cross-section reaching both upright side walls 12 of the moving table 11.
Reference numeral 6 denotes a plate having a width in the length direction of the forming bed 10, and both ends thereof reach both upright side walls 12 of the moving table 11.
Normally, the pressing member 32 uses a cross section L, H, or a C-shaped member. The pressing member 32 and the leveling plate 3
Each of the leading edges 6 is curved or inclined 38, 39 in the form of a sled so that concrete poured into the lower side thereof can easily enter.

Above each of the cavity forming cores 15 on the tip side of each of the cavity forming cores 15 than the concrete compaction device 30, there is provided a dent forming device 40. An endless belt or a caterpillar 42 provided with a linear portion 41 parallel to the forming bed 10 in the front-rear direction is provided on the lower side. It is provided.

The endless belt or caterpillar 42 has a depth at which the protrusion 43 is pushed into the concrete surface at an end near the second hopper 16 at a lower position, that is, an end near the root of the cavity forming core. The endless belt or the straight portion 41 of the caterpillar is sloped so that the depth becomes shallower toward the tip end of the molding core 15 (see FIG. 2).

As an example of the above-mentioned endless belt or caterpillar 42, a pair of left and right endless chains 44 is provided so as to engage with a sprocket gear 45, and the pair of left and right endless chains 4 is provided.
4 is a caterpillar 42a formed by fixing both ends of a cotter bar 47 at arbitrary positions of a chain element 46 constituting the chain element 4, and the cotter bar 47 forms the protrusion 43 (see FIG. 2).

The cotter bar 47 has a shape as shown in FIG. 3, for example, and a pair of two cotter bars 47 is provided in every other direction in the transfer direction. They may be arranged in rows (see FIG. 5). It is preferable that these cotter bars 47 are made of a strong steel material at the support part, and that the parts which are pressed against the concrete surface are made of hard synthetic rubber or a synthetic resin molded article having a little elasticity.

As an example of the above-described endless belt or caterpillar 42, an endless belt 42b made of synthetic rubber having a plurality of protrusions 43 on the outer peripheral surface thereof is also included in the embodiment of the present invention (FIG. 7). Instead of synthetic rubber, silicone rubber having good releasability from concrete may be used. These endless belts or caterpillars 42 are engaged with each cotter bar 47 and concrete,
With the movement of the moving table 11, the driving may be accompanied. For example, although not shown, the moving table 11
Of the endless belt or the caterpillar 42 is connected to the roller shaft or the sprocket gear 45 shaft on which the endless belt or the caterpillar 42 is engaged by a transmission means, and the endless belt or the caterpillar 42 is operated at the same speed as the speed of the movable base 11. I have to do it.

In the embodiment shown, a pre-leveling device 50 is located between the first hopper 23 and the cavity forming core 15 and is mounted on the moving table 11. Is a shape in which the cavity molding core 15 is extremely shortened, and the same number, the same number of spare cores 51 are provided, the front end portion is a sled shape, and the support portion 52 is vertically Vibrating means 53 which vibrates in the direction shown in FIG. This vibration means 53 is also a rotating eccentric wheel.

Operation of the Embodiment The movable table 11 is moved to one end of the forming bed 10, and a required number of PCs are first set along the surface of the forming bed 10 in the longitudinal direction.
The steel strand B is stretched by applying a desired tensile force. The ready-mixed concrete is supplied to the receiving hopper 20 in an amount necessary for molding, and all the devices mounted thereon are operated while moving the movable table 11 forward. First, the ready-mixed concrete in the receiving hopper 20 is supplied to the first and second hoppers 23 and 24 from the front and rear distribution ports 21 and 22 by feeders 25 and 26, and the ready-mixed concrete is directly supplied from the first hopper 23 onto the forming bed 10. Is supplied, and the ready-mixed concrete on the forming bed 10 is vibrated by the preliminary leveling device 50 in accordance with the movement of the moving table 11. Is attached.

Further, as the moving table 11 moves, each of the cavity forming cores 15 advances to the ridged valley portion, and then the ready-mixed concrete is transferred from the second hopper 24 to each of the cavity forming cores 15. The pressing device 31 advances to the supplied ready-mixed concrete position, and the ready-mixed concrete is moved between the cavity forming cores 15 and on both sides and the cavity forming cores 15 on both sides by the vertical movement of the pressing member 32. It is pushed downward from between the upright slip forming walls 12 to form the forming bed 10.
It is compacted around each of the cavity forming cores 15 above.

The moving table 11 further moves, and the leveling plate 36 vibrating up and down and up and down comes into contact with the concrete surface C on each cavity forming core 15, and the ready-mixed concrete is compacted around each cavity forming core 15. And the surface becomes smooth.

The moving table 11 is further moved, and the concrete surface C smoothed by the leveling plate 36 is placed on the cotter bar 4.
7 are successively pushed in, and the ready-mixed concrete is deformed into this shape. However, since this portion is still a portion where each cavity forming core 15 exists in the concrete layer, the cotter bar 4 is formed.
Even when pressed at 7, the cavity is not crushed. Each cotter bar 47 is gradually pulled out in the vertical direction by the gradient of the linear portion 41 of the caterpillar 42a in a state where the cotter bar 47 stays at the position with respect to the concrete layer, and finally, when the cotter bar 47 is completely pulled out, the cotter bar 47 becomes the caterpillar 42a. Moves above and circulates.

With the movement of the moving table 11 in all of these steps, each cavity forming core 15 is supported by a parallel link mechanism 17 and reciprocally oscillates 1 to 3 cm in the front-rear direction by a vibration device such as an eccentric wheel. And, it vibrates in the vertical direction by about 0.1 to 0.4 mm, the friction between each cavity forming core 15 and the concrete is cut, and each cavity forming core 15 reciprocates, whereby the inner peripheral surface of the cavity becomes smooth. Become. Each of the cavity forming cores 15 is divided into two sets, and the movement direction of the other sets is reversed in units of sets, so that inertia at the time of vibration is canceled out and vibration of the movable base 11 is suppressed. .

The moving table 11 is further moved, and each cavity forming core 15 is completely removed from the concrete, and the molding bed 10 is moved.
Are successively formed with hollow cavity cast concrete plates P. A method of forming the cavity precast concrete plate P by operating the first embodiment is an embodiment of the method invention according to claim 5. The frequency of each cavity molding core 15, pre-leveling device 50, pressing member 32 and leveling plate 36 is 6
The frequency is appropriately selected from the range of 0 times / minute to 300 times / minute, but this frequency is not particularly limited.

When the width of the cotter bar 47 is partially different as shown in FIG. 3, the shape of the dent 60 formed by the cotter bar 47 becomes a groove-shaped dent 60 whose width is partially different as shown in FIG. As shown in FIG. 5, when a cotter bar 47 having a projection 48 having a partially different height is used, the depression 60 has a groove shape and a partially different depth. Become.

[0042]

According to the first aspect of the present invention, the method described in the fifth aspect can be carried out with the movement of the movable base because the above construction and operation are performed. At the position before each cavity molding core is formed on the molding bed in sequence, each projection for forming a dent is formed on the upper surface of the compacted raw concrete and the endless belt or caterpillar is at the same speed as the moving speed of the moving table. And the projections are sequentially pushed into the upper surface of the ready-mixed concrete, and the respective projections stay on the ready-mixed concrete for the length of the endless belt or the linear portion below the caterpillar. With the movement of the movable table, the projections are respectively sequentially removed right above, so that the shape of each projection is accurately transferred to the concrete surface.

In the position where each projection is pressed,
Since it is a part of each cavity forming core, the cavity is not crushed at all, the concrete around the cavity is sufficiently compacted, a strong cavity is formed, and the cavity precast concrete board is placed on this When a cast-in-place concrete is applied to form a composite slab, it has the effect of being a sufficiently strong shacotter.

According to the second aspect of the present invention, in addition to the effects of the first aspect of the present invention, each of the projections for forming a dent on the upper surface of the consolidated raw concrete is provided with an endless belt or a caterpillar on a movable platform. Moving at the same speed as the moving speed, each of the protrusions is sequentially pushed into the upper surface of the ready-mixed concrete, and each of the protrusions stays in place with respect to the ready-mixed concrete. As the indentation becomes gradually shallower, these projections eventually come off the ready-mixed concrete surface, so that each protrusion does not contact the shoulder of the recess just formed at all, and the shape of each protrusion is accurately transferred to the ready-mixed concrete surface. Has the effect of

According to the third aspect of the present invention, in addition to the effects of the first and second aspects, the endless belt or the caterpillar is provided with a pair of left and right endless chains. For each of the predetermined chain elements constituting these, since both ends of the cotter bar of an arbitrary shape are caterpillars fixed in the transverse direction to the moving direction of the endless chain, the shape of the formed depression is considerably deep, a square groove, Such a square shape can be formed according to the shape of the cotter bar.

According to the fourth aspect of the present invention, the structure and operation are performed as described above. In addition to the effects of the first, second or third aspect, each of the cavity forming cores is provided by the moving platform. Reciprocating in these axial directions during the movement, the friction between the outer peripheral surface of each cavity forming core and the inner peripheral surface of each cavity of concrete is cut, and the movement resistance of the moving table is reduced, and The inner peripheral surface of the cavity becomes smooth, and in the subsequent process, these inner peripheral surfaces do not collapse, and finally, the inner peripheral surface of each cavity can be firmly formed.

According to the fifth aspect of the present invention, the first and second aspects of the present invention are constructed and operated as described above.
In addition to the effect of claim 4, each of the cavity forming cores reciprocates in their axial directions while the moving table is moving, so that the outer peripheral surface of each cavity forming core and the inner peripheral surface of each concrete cavity. And the friction of the moving table is reduced, the moving resistance of the moving table is reduced, and the inner peripheral surfaces of the respective cavities are smoothed. The effect is that the inner peripheral surface of the cavity can be firmly formed.

The method according to the sixth aspect of the present invention is constructed and operates as described above, so that the method according to the first, second, third, fourth, or fifth aspect of the present invention is realized. This has the effect of producing the same cavity precast concrete plate as when the apparatus was operated.

Effects of the Embodiment, In the embodiment, the spare core 51 is the hollow molded core 1
5, the moving frame has less movement resistance. Further, since the concrete compacting device is provided with two units of the pushing device 31 and the surface vibrating device 35 in order, there is no possibility that a nest is formed between the cavity forming cores 15 and the concrete plate surface becomes dense.

In the case where the cotter bar 47 is equipped with one having a partially different width, the recess 6 having a partially different width is used.
0 can be formed on the surface of the concrete plate A, and in the case where the cotter bar 47 is equipped with one having a partially different height, a groove-shaped depression 60 having a partially different width and a different depth is formed. It has the effect of molding on the surface.

An endless belt 42b is used as the dent forming device 40.
In the case of using the endless belt 4 between the projections 43,
This has the effect of holding down the concrete surface at the valley 49 of 2b and preventing the concrete from rising at this portion.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view of a mechanism of an entire apparatus.

FIG. 2 is a longitudinal sectional side view of a recess forming device portion.

FIG. 3 is a perspective view showing an example of a cotter bar.

4 is a partially cutaway perspective view of a concrete plate showing a shape of a depression formed by the cotter bar of FIG. 3;

FIG. 5 is a perspective view showing another example of the cotter bar.

FIG. 6 is a partially cutaway perspective view of a concrete plate showing a shape of a recess formed by the cotter bar of FIG. 5;

FIG. 7 is a partially longitudinal side view of a dent forming device using an endless belt.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Forming bed 11 Moving stand 15 Cavity forming core 23 1st hopper 24 2nd hopper 30 Concrete compaction apparatus 40 Depression forming apparatus 41 Linear part 42 Endless belt or caterpillar 42a Caterpillar 42b Endless belt 43 Projection

Claims (6)

[Claims] 1. A long concrete molding bed and a movable platform which is laid on the concrete bed and which is movable along the longitudinal direction thereof. A pair of left and right upright slip forming walls which are in dynamic contact are provided, and a plurality of cavity forming cores extending parallel to the forming bed surface, separated from the forming bed surface, and extending in the longitudinal direction are provided on the movable table, respectively. Further, the movable table is provided with at least one hopper for supplying concrete kneaded on the molding bed and on each of the cavity forming cores, and the hopper is provided with at least one of the cavity forming cores. In a traveling-type cavity precast concrete plate manufacturing device provided with at least one concrete consolidation device in the upper part near the front end from the support portion side in the front direction, the consolidation device An endless belt further provided on the distal end side of each cavity forming core, above each cavity forming core, in the front-rear direction of the moving table, and provided on the lower side with a linear portion parallel to the forming bed. A continuous cavity precast concrete plate manufacturing apparatus, characterized in that the endless belt or the caterpillar is provided with a depression forming device having a plurality of projections provided on an outer peripheral surface of the endless belt or the caterpillar. 2. The endless belt or caterpillar has a depth at which the projection is pushed into a concrete surface at a position near the root of the cavity forming core at a front end at a lower position,
2. The traveling type hollow according to claim 1, wherein a straight portion of the endless belt or chain is sloped so that the depth becomes shallower toward a tip end side of the cavity forming core. Precast concrete plate manufacturing equipment. 3. The endless belt or caterpillar is a caterpillar in which both ends of a cotter bar having an arbitrary shape are fixed in a transverse direction to a moving direction of the endless chain for each predetermined chain of a pair of left and right endless chains. The traveling-type cavity precast concrete plate manufacturing apparatus according to claim 1 or 2, wherein: 4. Each of the cavity forming cores is mounted on the movable stage so that the movable stage can reciprocate in the axial direction of the cavity forming core while the movable stage is moving in the molding direction. The traveling-type cavity precast concrete plate manufacturing apparatus according to claim 1, 2 or 3. 5. The consolidating device comprises a pushing device and a surface vibrating device, which are sequentially provided from the front to the rear. The pushing device is provided with a pressing member above each of the plurality of cavity forming cores. In the position, it is a device that moves up and down by a vertical reciprocating drive means, and the surface vibrating device is a device in which a leveling plate that comes into contact with the ready-mixed concrete surface vibrates reciprocally back and forth and up and down. The traveling-type cavity precast concrete plate manufacturing apparatus according to claim 1, 2, 3, or 4. 6. The first, second, third and fourth aspects of the present invention.
Or, using the apparatus according to the present invention, the upright wherein the ready-mixed concrete is fixed to the moving table from the two hoppers while moving the moving table moving on the long forming bed in the forming direction. The ready-mixed concrete that is supplied between the slip forming walls and above the forming bed and each of the cavity forming cores, and is pressed and poured from above each of the cavity forming cores into the bed and each of the cavity forming cores. Between the cavity molding cores and between each of the cavity molding cores, further forming a ready-mixed concrete layer on each of the cavity molding cores to a predetermined thickness, and a ready-mixed concrete layer at a position where each of the cavity molding cores is present. An endless belt or a protrusion provided on the outer peripheral surface of the caterpillar provided with a linear portion in the front-rear direction of the moving table on the upper surface of the moving table is sequentially pressed first to move the endless belt or the caterpillar at the same speed with respect to the moving table. Move with These projections are temporarily retained on the concrete surface, and with the movement of the moving table, the respective projections are sequentially pulled out of the concrete surface in a vertical direction in the same posture, and grooves or depressions are sequentially formed on the concrete surface. A method of using a traveling-type cavity precast concrete plate production apparatus, comprising: