JP2878920B2 - Splash prevention mechanism in ready-mixed concrete production equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a production apparatus for producing ready-mixed concrete, and more particularly to a splash-prevention mechanism for preventing the ready-mixed concrete from scattering around the ready-mixed concrete when it is put into a mixer truck. .

[0002]

2. Description of the Related Art Conventionally, ready-mixed concrete used for concrete work is manufactured by a ready-mixed concrete manufacturing device (so-called batcher plant) due to location restrictions at a construction site or the like, and a mixer truck (agitator truck).
And transported to construction sites. In this batcher plant, for example, in the case of a wet method, aggregate (gravel, sand), water, etc. are accurately measured by a measuring machine, and they are mixed and kneaded by a mixer to produce ready-mixed concrete. ing. Further, the batcher plant is provided with a concrete hopper for temporarily storing the manufactured ready-mixed concrete, a hopper gate for opening and closing an opening provided at a lower portion of the concrete hopper, and the like. Then, the mixer truck enters the batcher plant,
When the hopper of the mixer truck is located immediately below the opening of the concrete hopper, the hopper gate is opened, and the ready-mixed concrete flows down to the hopper at a stretch and fills the drum.

[0003]

However, in the batcher plant of the above-mentioned wet type, there is a problem that when the fresh concrete is put into a mixer car, the concrete scatters around.

[0004] That is, since the ready-mixed concrete is kneaded and is in a liquid state, when it is poured, it vigorously collides with the hopper and rebounds, and scatters around from the gap between the input opening of the concrete hopper and the hopper of the mixer truck. Then, the scattered ready-mixed concrete adheres to the wall surface of the mixer truck or the batcher plant. For this reason, it is necessary to frequently remove the ready-mixed concrete in order to prevent solidification of the ready-mixed concrete adhering to the mixer truck or the like, and the removing operation is very troublesome.

[0005] Another problem is that the inner surface of the hopper is worn down due to the collision with the hopper when the ready-mixed concrete is charged. Therefore, flat rubber is adhered to the portion of the hopper where the ready-mixed concrete collides, so that the hopper is not worn down.However, since the life of the rubber is short, it is necessary to replace the rubber periodically. . Therefore, the work of re-placing is troublesome, and the rubber is used regularly, which increases the cost.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to prevent scattering of ready-mixed concrete into the surroundings at the time of being put into a mixer truck, and to reduce wear of a hopper of the mixer truck. It is an object of the present invention to provide a scatter prevention mechanism in a ready-mixed concrete production device capable of preventing the occurrence of scatter.

[0007]

In order to solve the above-mentioned problems, a first aspect of the present invention is to temporarily store, in a concrete hopper, ready-mixed concrete in which cement, aggregate and the like are mixed and kneaded in appropriate amounts. In the ready-mixed concrete production apparatus wherein the input opening of the concrete hopper is opened and closed to put the ready-mixed concrete into the hopper of the mixer truck, the raw hopper of the mixer truck is placed between the concrete hopper and the hopper of the mixer truck. A shielding member is provided for shielding the area around the ready-mixed concrete that enters and enters the hopper.

According to a second aspect of the present invention, a pair of the shielding members are disposed in the same direction as or intersecting with the entering direction of the mixer truck, and the shielding members enter the hopper by the driving means to prepare the ready-mixed concrete. It can be moved between the loading position where the vehicle is inserted and the standby position where the mixer vehicle enters and exits.

[0009] The invention of claim 3 is characterized in that the shielding member has abrasion resistance.

[0010]

According to the first aspect of the present invention, ready-mixed concrete produced by mixing and kneading cement, aggregate and the like in appropriate amounts in the ready-mixed concrete manufacturing apparatus is temporarily stored in a concrete hopper. Is done. When the ready-mixed concrete is put into a mixer truck, when the hopper of the mixer truck is located immediately below the input opening of the concrete hopper, the surroundings of the ready-mixed concrete that enters into the hopper from outside and are put into the hopper are shielded. You. Thus, the shielding member prevents the ready-mixed concrete from scattering around. Further, the ready-mixed concrete put in by the shielding member does not directly collide with the hopper, thereby preventing the hopper from being worn down.

According to the second aspect of the present invention, the shielding member moves to the standby position when the mixer vehicle enters and exits, and moves to the loading position where the shielding member has entered the hopper when the ready-mixed concrete is loaded. For this reason, the entry and exit of the mixer truck into and out of the ready-mixed concrete production device are performed smoothly.

According to the third aspect of the present invention, since the shielding member has abrasion resistance, abrasion due to a collision at the time of putting fresh concrete is reduced, and the useful life of the shielding member is improved.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will now be described with reference to FIGS.
This will be described with reference to FIG. As shown in FIG. 1, a batcher plant as a ready-mixed concrete manufacturing apparatus includes a concrete hopper 1 for temporarily storing ready-mixed concrete produced by kneading cement, aggregate, and water via a measuring machine and a mixer (not shown). Have. The concrete hopper 1 has a lower part formed in a mortar shape, and an opening 1a (illustrated by a broken line) is formed at the lower end thereof. or,
A cylindrical cover 2 is covered around the opening 1a, and an input opening 2a whose leading end is reduced in diameter is formed. The cover 2 is made of a rubber material having abrasion resistance, so that abrasion at the time of putting the ready-mixed concrete is reduced. A pair of hopper gates 3 for opening and closing the opening 2a of the cover 2 are swingably attached to a lower portion of the concrete hopper 1. The two hopper gates 3 are equipped with gate opening / closing cylinders 4, respectively, and the cylinder rods 4a of the cylinders 4 are contracted and both hopper gates 3 are opened based on manual operation of a closing switch on an operation panel (not shown). It has become. When the gate 3 is opened, the ready-mixed concrete C in the concrete hopper 1 passes through the cover 2 and is put into a hopper H (shown by a two-dot chain line) of the mixer truck. Therefore, the hopper gates 3 are always closed and the input opening 2a of the cover 2 is closed, and the ready-mixed concrete in the concrete hopper 1 is not discharged.

Next, a scattering prevention mechanism in the batcher plant will be described. As shown in FIGS. 1 and 2, a base 6 is fixed to a side wall 5 below the concrete hopper 1 of the batcher plant. An opening 6a is provided through the base 6 at a position facing the concrete hopper 1, so that the tip of the cover 2 can be located in the opening 6a. First and second cylinders 7 and 8 are fixed on the base 6 on the side wall 5 side and on the side opposite to the side wall 5, respectively. The first and second cylinders 7, 8 are fixed obliquely downward so that the cylinder rods 7a, 8a face the opening 6a side.

A pair of columns 9 are provided upright on both sides of the opening 6a on the side of the first cylinder 7, and a first guide 10 is suspended between the columns 9 via a chain 11. I have. The first guide 10 has three large rollers 10a.
And a pair of small rollers 10 disposed between the large rollers 10a.
b, and each is rotatably connected. And the first guide 10 is a large roller 10
The chain 11 is connected to a and has a substantially arc shape as a whole. A pair of guide rods 12a are connected to both chains 11, and a pair of guide rods 12b are connected to both ends of both small rollers 10b. And the guide rod 12
a is inserted through an insertion pipe 14 fixed to the columns 13 on both sides of the base 6, and the guide rod 12 b is inserted through an insertion port (not shown) at the open end of the base 6. Accordingly, the first guide 10 is guided by the guide support rods 12a and 12b, and can swing in the front-rear direction. In addition, the first guide 10 is configured such that the chain 11 is bent and can slide slightly in the left-right direction.

A second guide 15 is provided on the base 6 near the support 13. The second guide 15 has a support base 16 formed in a substantially U-shape, and has an opening 6a.
It is fixed to incline to the side. Further, three rollers 16a are supported on the support base 16 so as to be rotatable and have a substantially arc shape as a whole.

The cylinder rod 7 of the first cylinder 7
A slide cover 17 as a shielding member is attached to the tip of “a”. When the cylinder rod 7a of the first cylinder 7 is extended, the slide cover 17 has its base end mounted on the first guide 10 and extends substantially from the center to the front end of the mixer wheel. Inner surface H of hopper H
a. A hopper cover HC made of rubber is provided above the hopper H of the mixer truck.

As shown in FIG. 3, the slide cover 17 is made of a flexible rubber (product name: Rubber Cloth HT).
60, manufactured by Bando Chemical Co., Ltd.), and is formed in a flat plate shape having a sufficient area to cover most of the inner surface Ha of the hopper H of the mixer truck. Further, the slide cover 17 cushions the collision force when the ready-mixed concrete C is charged, and prevents rebound. Further, the slide cover 17 has abrasion resistance, so that abrasion caused by a collision when the fresh concrete C is charged is reduced.
At the base end in the width direction of the slide cover 17, an auxiliary metal fitting 18 for forming the cover 17 into the same arc shape as the first and second guides 10 and 15 is attached. When the ready-mixed concrete is loaded, the cylinder rod 7a is extended, and the slide cover 17 is placed on the first guide 10 with its base end in an arc shape (loading position). At this time, the tip end side of the slide cover 17 spreads in a tongue shape and reaches the inner part Ha of the hopper H. In the standby state, the cylinder rod 7a is contracted, and as shown in FIG. 5, a part of the slide cover 17 is placed on the first and second guides 10 and 15 (standby position). At this time, the slide cover 17 is housed in a substantially arcuate shape as a whole.

As shown in FIGS. 1 and 2, a pair of columns 19 are provided at the end of the opening 6a on the second cylinder 8 side in the horizontal direction.
0 is rotatably supported. An auxiliary cover 21 as a shielding member is attached to the tip of the cylinder rod 8a of the second cylinder 8.
1 is mounted on the guide roller 20.

As shown in FIG. 4, the auxiliary cover 21 is formed in a plate shape shorter than the slide cover 17, and a side cover 21a is bent at a part of both sides. The auxiliary cover 21 covers the inner surface Ha of the hopper H that is not covered by the slide cover 17. The auxiliary cover 21 is provided with the slide cover 17.
Made of the same rubber. As shown in FIGS. 1 and 2, when the ready-mixed concrete is charged, the cylinder rod 8 a of the second cylinder 8 is extended, and the base end of the auxiliary cover 21 is placed on the guide roller 20. It hangs down below the base 6 (loading position). Therefore, most of the inner surface Ha of the hopper H is covered by the slide cover 17 and the auxiliary cover 21, and in this state, when the ready-mixed concrete C is put in, the periphery thereof is shielded in the hopper H. ing. Further, the periphery of the ready-mixed concrete C is shielded by the two covers 17 and 21 in a part of a gap between the hopper H and the input opening 2a of the cover 2. Further, the auxiliary cover 2
1 is shorter than the slide cover 17, the stroke of the cylinder rod 8a of the second cylinder 8 is shorter than the stroke of the cylinder rod 7a of the first cylinder 7.

The auxiliary cover 21 hangs below the base 6 even during standby. That is, the auxiliary cover 21 serves as a driver's target when a small mixer vehicle with a low hopper position enters, and abuts on a hopper cover (not shown) provided at the upper end of the hopper to facilitate entry into the hopper. . Therefore, the cylinder rod 7a is contracted only when the mixer vehicle enters, and as shown in FIG. 5, the auxiliary cover 21 is pulled up and hangs down with the upper end of the side cover 21a located near the opening 6a. ing.

As shown in FIG. 1, a first limit switch 22 for detecting the entry of a mixer car is attached to the tip side of the base 6, and the switch piece 22a is hung downward. . A second limit switch 2 for detecting the hopper H is provided on the base 6 near the opening 6a.
3 is attached, and the switch piece 23a hangs downward. And the first limit switch 2
The drive of the second cylinder 8 is controlled by a control device (not shown) based on the detection of the second mixer vehicle. Further, based on the detection of the hopper H of the second limit switch 23, the driving of the first and second cylinders 7, 8 is controlled by a control device (not shown). The first cylinder 7 can be driven by a manual operation on an operation panel (not shown).

Further, at the end of the loading of the ready-mixed concrete, the first and second cylinders 7 and 8 are driven based on the operation of an end switch of an operation panel (not shown). Further, an optical sensor (not shown) is provided at the entrance and exit of the mixer truck of the batcher plant, and when the passage of the mixer truck is detected, the driving of the second cylinder 8 is controlled.

Further, on the base 6 near the guide roller 20, a shower device 24 for removing the fresh concrete C adhered to the slide cover 17 after the fresh concrete C is charged is provided. Then, at the end of the loading of the ready-mixed concrete, the shower device 24 is driven based on the operation of an end switch of an operation panel (not shown) to discharge a certain amount of water to the slide cover 17.

Next, the operation of the scattering prevention mechanism of the batcher plant configured as described above will be described. First, the cylinder rod 7a of the first cylinder 7 is contracted, and the slide cover 17 is stored at the standby position placed on the first and second guides 10 and 15. Further, the cylinder rod 8a of the second cylinder 8 is extended, and the auxiliary cover 21 is suspended at a standby position where the base end thereof is placed on the guide roller 20.

When the mixer truck enters the batcher plant from the rear and its hopper H comes into contact with the switch piece 22a of the first limit switch 22, the first limit switch 22 is turned on and the entry of the mixer truck is started. Is detected.
Then, the control unit (not shown) drives the second cylinder 8 to contract the cylinder rod 8 a, and the auxiliary cover 21 is pulled up while being supported by the guide roller 20.

Subsequently, as shown in FIG. 5, the mixer wheel further enters rearward, and the hopper H comes into contact with the switch piece 23a of the second limit switch 23 and the auxiliary cover 21. Then, the second limit switch 23 is turned on to detect that the hopper H is approaching below the opening 2a. Further, the mixer vehicle moves backward until the hopper H passes below the auxiliary cover 21 and the hopper cover HC approaches the auxiliary cover 21.

As shown in FIG. 6, when the mixer truck stops with the hopper H positioned immediately below the concrete hopper 1, the first cylinder 7 is driven by the control device (not shown) to extend the cylinder rod 7a. Is done. Then, the slide cover 17 is moved to the first and second guides 10,
While being rotatably supported by the fifteen rollers 10a, 10b, 16a, the rollers gradually project from the base 6 from the front end thereof and enter the hopper H (loading position). Next, the second cylinder 8
Is driven to extend the cylinder rod 8a (the input position). Then, the auxiliary cover 21 is lowered while being rotatably supported by the guide roller 20, and is placed on the inner surface Ha of the hopper H so as to overlap a part of the slide cover 17.

At this time, the slide cover 17 protruding from the base 6 spreads in a tongue-like shape, enters the inner surface Ha of the hopper H, and is placed so as to cover at least half of the inner surface Ha. . Also, when the slide cover 17 enters, even if the hopper H is slightly displaced, the cover 17 is slightly slid in the left-right direction by the chain 11 of the first guide 10, and is swung in the front-rear direction by the guide bars 12a, 12b. Is located in the hopper H.

Subsequently, as shown in FIG. 1, a closing switch on an operation panel (not shown) is operated to drive the cylinder 4 and contract the cylinder rod 4a. Then, both hopper gates 3 are opened, and the ready-mixed concrete C stored in the concrete hopper 1 through the input opening 2a of the cover 2 is opened.
Are thrown in at once while colliding with the slide cover 17 and the auxiliary cover 21. At this time, the periphery of the ready-mixed concrete C is shielded by the slide cover 17 and the auxiliary cover 21 in the hopper H. The periphery of the ready-mixed concrete C is also shielded in a part of the gap between the hopper H and the input opening 2a of the cover 2. In addition, the collision force of the put ready-mixed concrete C is reduced by the slide cover 17.
And the buffer is reduced by the auxiliary cover 21, so that the rebound is reduced. Therefore, the ready-mixed concrete C is thrown into the hopper H without scattering around.

When the end switch of the operation panel (not shown) is operated after the input of the ready-mixed concrete C is completed, the shower device 24 is driven to discharge a certain amount of water to the slide cover 17 as shown in FIG. The ready-mixed concrete C adhered to 17 is removed. Subsequently, as shown in FIG. 8, the first and second cylinders 7, 8 are driven to contract the cylinder rods 7a, 8a. Then, the slide cover 17 and the auxiliary cover 21 are moved to the respective rollers 10a, 10a.
It is pulled up while being rotatably supported by b and 16a, and returns to the standby state. At this time, the first and second guides 10 and 15 are gradually removed from the base end of the slide cover 17.
And is stored in an arc shape.

Next, as shown in FIG. 9, when the mixer truck into which the ready-mixed concrete C has been put forward moves out of the batcher plant, an optical sensor (not shown) detects the passage, and the second cylinder 8 is moved. Driven by the cylinder rod 8a
Is extended. And. The auxiliary cover 21 is hung down with its base end placed on the guide roller 20. In this way, the operation of putting the fresh concrete C into the mixer truck is completed.

It should be noted that ready-mixed concrete C
Is turned on, the switch pieces 22a, 23 of the first and second limit switches 22, 23 are set even if the mixer vehicle enters.
The hopper H is stopped in a state where the hopper H is located at the loading position of the concrete hopper 1 without contacting the contact hopper a. Then, the first cylinder 7 is driven by a manual operation of an operation panel (not shown) so that the slide cover 17 enters the hopper H as described above. At this time, it does not reach the inner part of the inner surface Ha of the hopper H, but since the portion of the hopper H where the fresh concrete C collides is covered, rebound is prevented. Then, the work of putting the ready-mixed concrete C into the mixer truck is performed according to the above-described procedure.

As described above, in this embodiment, the rubber slide cover 17 and the auxiliary cover 21 surround the ready-mixed concrete C inside the hopper H of the mixer truck and in a part of the gap between the hopper H and the input opening 2a. Was shielded. Therefore, scattering of the ready-mixed concrete C around the ready-mixed concrete C can be prevented. As a result, the ready-mixed concrete C does not adhere to the mixer truck or the like, and the trouble of performing a cleaning operation for removing the ready-mixed concrete C can be omitted.

The slide cover 17 and the auxiliary cover 2
1 can be moved between a loading position where the ready-mixed concrete C is loaded by the first and second cylinders 7 and 8 and a standby position where the mixer truck enters and leaves, so that the mixing vehicle can enter and exit smoothly. It can be carried out.

Further, since the ready-mixed concrete C does not directly collide with the inner surface Ha of the hopper H, it is possible to prevent the hopper H from being worn down. Therefore, the useful life of the hopper H can be increased. Further, since the slide cover 17 and the auxiliary cover 21 are made of rubber having abrasion resistance, the wear of the rubber is reduced, and the service life can be increased. Therefore, the cost of the slide cover 17 and the auxiliary cover 21 can be reduced.

Further, the first guide 10 on which the slide cover 17 is mounted is connected to the chain 11, the large and small rollers 10a and 10a.
b. The guide rods 12a and 12 are slidable in the left-right direction and swingable in the front-rear direction, so that the degree of freedom when the cover 17 enters the hopper H can be increased. Therefore, even if the hopper H is slightly displaced, the slide cover 17 can be inserted in accordance with the displacement.

It should be noted that the present invention is not limited to the above embodiment, but may be made as follows without departing from the spirit of the present invention. (1) In the above embodiment, a gap is formed between the hopper H and the charging opening 2a of the cover 2. However, the cover 2 can be moved up and down to lower the cover when the ready-mixed concrete C is charged. The charging opening may be located in the hopper H. By adopting the above-described configuration, ready-mixed concrete is charged in the hopper H of the mixer truck, and scattering to the surroundings is further reduced. (2) In the above embodiment, the first and second limit switches 23 are used to detect the mixer wheel and the hopper H. However, other optical sensors, ultrasonic sensors, and the like may be used instead. Also, instead of the first and second limit switches,
A manual switch may be provided so that the driver operates the switch directly. (3) In the above embodiment, the slide cover 17 and the auxiliary cover 21 are made of abrasion-resistant rubber, but other materials such as synthetic resin may be used instead. (4) In the above embodiment, the first and second cylinders 7 and 8 are provided, and the slide cover 17 and the auxiliary cover 21 are attached to the distal ends of the cylinder rods 7a and 8a, respectively.
A plurality of the first and second cylinders 7 and 8 may be provided. Alternatively, only the first cylinder 7 may be provided, and the slide cover 17 may be attached to the tip of the cylinder rod 7a. (5) In the above embodiment, the shower device 24 is provided on the base 6 near the guide roller 20 so that the slide cover 17 is provided.
Although the ready-mixed concrete C attached to was removed.
A plurality of shower devices 24 may be provided to discharge water to the auxiliary cover 21. Alternatively, the ready-mixed concrete C may be introduced without providing the shower device 24. (6) In the above-described embodiment, the slide cover 17 is formed in a flat plate shape. However, the end portion may be formed in a wide shape to cover the inner surface Ha of the hopper H of the mixer truck. or,
The shape of the auxiliary cover 21 may be changed. (7) In the above embodiment, the ready-mixed concrete C produced by kneading cement, aggregate, and water through a weighing machine and a mixer by a wet method is put into a mixer truck. Fresh concrete C mixed with aggregate may be put into a mixer truck. In this case, the ready-mixed concrete C is mixed with water added to the drum of the mixer truck during transportation. (8) In the above embodiment, the slide cover 17 and the auxiliary cover 21 are arranged in the same direction as the approach direction of the mixer vehicle. H may be entered. (9) In the above embodiment, the first cylinder 7 can be driven by a manual operation using an operation panel (not shown). However, the drive can be automatically controlled as needed, or the first and second cylinders 7 can be driven. , 8 may be arbitrarily stopped. In this case, the driving of the first and second cylinders 7 and 8 is stopped in a state where the slide cover 17 and the auxiliary cover 21 are at the standby position.

[0039]

As described above in detail, according to the present invention, it is possible to prevent scattering of ready-mixed concrete to the surroundings at the time of being put into a mixer truck, and also to prevent abrasion of a hopper of the mixer truck. It has excellent effects.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing a scattering prevention mechanism in a batcher plant of the present embodiment.

FIG. 2 is a schematic plan view showing a scattering prevention mechanism.

FIG. 3 is a schematic perspective view showing a slide cover of the scattering prevention mechanism.

FIG. 4 is a schematic perspective view showing an auxiliary cover of the scattering prevention mechanism.

FIG. 5 is a schematic side view showing a state where the mixer vehicle has entered a batcher plant.

FIG. 6 is a schematic side view showing a state in which a slide cover and an auxiliary cover have entered a hopper of a mixer vehicle.

FIG. 7 is a schematic side view showing a state where the shower is discharged after the addition of the ready-mixed concrete.

FIG. 8 is a schematic side view showing a state in which a slide cover and an auxiliary cover are pulled up from a hopper of a mixer truck.

FIG. 9 is a schematic perspective view showing a state where the mixer truck has exited the batcher plant after the ready-mixed concrete has been charged.

[Explanation of symbols]

1 concrete hopper, 7 first cylinder as driving means, 8 second cylinder as driving means, 17
... Slide cover as a shielding member, 21 ... Auxiliary cover as a shielding member, H ... hopper, C ... mixed concrete.

Claims (3)

(57) [Claims] 1. A ready-mixed concrete (C) in which cement, aggregate and the like are mixed and kneaded in appropriate amounts, respectively, are temporarily stored in a concrete hopper (1), and an input opening (2a) of the concrete hopper (1) is stored. ) Is opened and closed to put the ready-mixed concrete (C) into the hopper (H) of the mixer truck. The mixer is provided between the concrete hopper (1) and the hopper (H) of the mixer truck. Enter the hopper (H) of the car,
A scattering prevention mechanism in a ready-mixed concrete manufacturing device, comprising a shielding member (17, 21) for shielding the surroundings of the ready-mixed concrete (C) charged into the hopper (H). 2. A pair of said shielding members (17, 21) are provided in the same direction as or intersecting with the approach direction of the mixer vehicle, and said shielding members (17, 21) are driven by driving means (7, 8). 2. The raw material according to claim 1, wherein the raw material can be moved between a charging position for entering the hopper (H) and charging the ready-mixed concrete (C) and a standby position where the mixer vehicle enters and leaves. Shatter prevention mechanism in concrete manufacturing equipment. 3. The scattering prevention mechanism in the ready-mixed concrete production apparatus according to claim 1, wherein the shielding member (17, 21) has abrasion resistance.