JP3480855B2 - Concrete plant - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete bucket and a concrete plant used for constructing a large amount of concrete such as dam construction work such as dams, and more particularly, to reduce the equipment cost of the concrete plant. The present invention relates to a concrete bucket and a concrete plant.

[0002]

2. Description of the Related Art Generally, in concrete placing work for dam construction such as dams, concrete is put in a concrete bucket having a dropping port and a gate for opening and closing the dropping port, and the concrete bucket is driven by a crane or the like. The method of transporting to the installation site, opening the gate at the installation site and dropping milk is adopted.

As this concrete bucket, as disclosed in, for example, Japanese Patent Application Laid-Open No. 4-75997, it supports a bucket body having a dropping opening and a gate for opening and closing the dropping opening, and a bucket body. A support frame, a hanger frame supported by the support frame so as to be able to move up and down, a pumping cylinder mounted between the support frame and the hanger frame, and a gate cylinder that opens and closes the gate by taking in and out pressure oil pressurized by the pumping cylinder. Those equipped with are in practical use.

In this concrete bucket, since the hanger frame cannot be laid down sideways, concrete milk cannot be dropped directly from directly above the bucket body.

Therefore, a concrete plant for loading milk into this concrete bucket is provided with a hopper for dropping concrete milk and a trolley provided with a dump type bucket for receiving the milk dropped from the hopper. Milk is loaded into a concrete bucket by the procedure of dropping and moving the dolly to the vicinity of the concrete bucket, tilting the bucket of the dolly and transferring the milk to the bucket body of the concrete bucket.

However, this trolley needs a delicate tilt angle control of the bucket in order to smoothly transfer a large amount of concrete to the concrete bucket, and expensive software that costs tens of millions of yen is required for this control. An embedded electronic device is used.

[0007]

As a result, the equipment cost of the entire concrete plant becomes high, and the cost of loading milk from the hopper for dropping the concrete milk into the concrete bucket becomes high.

The present invention has been made in view of the above circumstances, and provides a concrete bucket and a concrete plant capable of inexpensively loading milk from a hopper for dropping concrete milk into the concrete bucket. It is intended.

[0009]

A concrete bucket according to the present invention is provided with a dropping main body provided with a dropping opening and a gate for opening and closing the dropping opening, a supporting frame for supporting the bucket main body, and an elevating and lowering unit for the supporting frame. Assuming a concrete bucket provided with a supported hanger frame, a pumping cylinder mounted between the support frame and the hanger frame, and a gate cylinder that opens and closes the gate by supplying and discharging pressure oil pressurized by the pumping cylinder, In order to achieve the above purpose, the following measures are taken.

That is, the bucket body is detachably supported on a support frame, and the gate cylinder and a drive gear driven thereby are supported on the support frame. When the gate cylinder is operated for a certain amount or more, the drive gear is supported by the drive gear. The concrete bucket is characterized in that a driven gear that meshes with the bucket body is supported and a gate is interlocked with the driven gear.

Further, in order to achieve the above-mentioned object, the concrete plant of the present invention is a loading / unloading device for attaching / detaching the bucket body of the concrete bucket of the present invention to / from a support frame at a transfer stage, and a bucket detached from the support frame. A concrete plant is provided with a hopper for dropping concrete milk on a main body at a dropping stage, and a transfer device for transferring a bucket main body detached from a support frame between the drop stage and the transfer stage.

[0012]

[Operation] According to the concrete bucket of the present invention, by removing the bucket main body from the support frame, the hanger frame can be made to disappear above the bucket main body, whereby the bucket main body can be directly attached to the hanger frame. You will be able to drop milk.

Further, when the gate cylinder is operated for a certain amount or more in a state where the bucket main body on which the milk has been dropped is supported by the support frame, the drive gear supported by the support frame meshes with the driven gear of the bucket main body, and Is opened and closed.

Then, a carrying device for carrying the bucket body between the unloading stage for unloading the bucket body on the support frame and the dropping stage for dropping milk from the hopper, and a loading device for unloading the bucket body on the support frame. The milk can be loaded from the hopper into the concrete bucket simply by providing a wholesaler.

Here, the transporting device may be configured so that the bucket body can be moved in parallel while standing upright, and an expensive control device for tilting the dump type bucket containing milk is not required.

The loading and unloading device may be configured so that the bucket body can be lifted from the transport device via the support frame or can be hung from the transport device, and a dump type bucket containing milk is used. No expensive tilting control device is required.

According to the concrete plant of the present invention,
At the transfer stage, the bucket body is separated from the support frame by the unloading device, milk is dropped on the bucket body moved to the dropping stage by the transfer device, and the bucket body containing the milk is sent to the unloading stage by the transfer device. After
The loading of milk into the concrete bucket is completed by supporting the bucket body on the support frame with the unloading device.

When milk is dropped on the dropping stage, since there is no hanger frame above the bucket body that is separated from the support frame and is carried into the dropping stage, milk is dropped directly from the hopper to the bucket body.

Here, as the transfer device, it suffices if the bucket body is supported in an upright state so as to be able to move horizontally, for example, and an expensive control device for tilting a dump type bucket containing milk is It becomes unnecessary.

The loading and unloading device only needs to be constructed so that the bucket main body is lifted through the support frame, and an expensive control device for tilting the dump type bucket containing milk is unnecessary.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A concrete bucket and a concrete plant according to an embodiment of the present invention will be described below in detail with reference to the drawings.

As shown in FIG. 4, a concrete plant according to one embodiment of the present invention is a loading and unloading process in which a bucket body 2 of a concrete bucket 1 according to one embodiment of the present invention is attached to and detached from a support frame 3 at a transfer stage. A device 4, a hopper 5 for dropping concrete milk onto the bucket body 2 detached from the support frame 3 at the dropping stage, and a transport device for transporting the bucket body 2 detached from the support frame 3 to the dropping stage / transfer stage. 6 is provided.

As described later, the loading / unloading device 4 may be constructed so that the bucket body 2 can be lifted from the carrying device 6 via the support frame 3 or can be hung from the carrying device 6. In this case, a crane that transports bucket concrete to a place where the concrete is placed (in FIG. 4, only the hook and the tip of the wire are shown by a chain double-dashed line) is also used.

Further, the transfer device 6 may be constructed so that the bucket body 3 can be placed and the bucket body 2 can be moved upright between the dropping stage and the transfer stage to be translated. Although it is possible to use a dolly that can be moved by, a self-propelled dolly equipped with a motor, a prime mover and the like is used here.

The transporting device 6 may be a non-rail type device using tires, crawlers, etc., but here, in order to stabilize the transporting route, the rails are guided to move.

As shown in FIGS. 1 to 3, at the bottom of the bucket body 2, a dropping port, a pair of gates 7 for opening and closing the dropping port, and a spring for urging the gate 7 to a closed position as required. And a support frame 9 for supporting the bucket body 2 detached from the support frame 3 in an upright state.

An outer collar 10 is provided on the upper portion of the bucket body 2.
The outer flange 10 is provided with positioning pins 11 on the left, right, and rear three sides as required. As shown in FIG. 3, the support frame 3 is formed in a U shape in a plan view, and supports 12. 1 for positioning and supporting the positioning pins 11 of the bucket body 2 at three positions on the upper surface thereof.
3 is provided.

The hanger frame 14 supported by the support frame 3 so as to be able to move up and down includes a pair of slide beams 15 supported by the support frame 3 so as to be able to move up and down, and a balance 16 for connecting the upper ends thereof. An eye 17 fixed to the central upper surface of the balance 16 is provided.

Further, a hydraulic circuit 18 is supported on the support frame 3, and the hydraulic circuit 18 supports the support frame 3.
Between the hanger frame 14 and the hanger frame 14, a pair of pumping cylinders 19, an accumulator 20 for storing the pressure oil pressurized by the pumping cylinder 19, and a pair of reverses for preventing backflow from the accumulator 20 to the pumping cylinder 19. A stop valve 21, a gate cylinder 22 that opens and closes the gate 7 by supplying and discharging pressure oil pressurized by the pumping cylinder 19, a direction switching valve 23 and a gate cylinder 22 that control the supply and discharge of pressure oil to and from the gate cylinder 22. A bias accumulator 24 that applies a bias pressure to the gate cylinder 22 to restore the shortened state is provided.

As shown in FIG. 5, the pumping cylinder 19 has an oil passage hole 19c which is opened and closed by a check valve 19b in the cylinder 19a, and is slidable on the piston rod 19d within a predetermined range. With a fitted piston 19e,
When shortening, check valve 19b as shown by the two-dot chain line in the figure
To open the hydraulic fluid to the suction chamber 19f below the piston 19c.
To the discharge chamber 19g above the piston 19c,
At the time of extension, as shown by the solid line in the figure, the check valve 19b is closed to pressurize and discharge hydraulic oil from the discharge chamber 19g, and at the same time reduce the pressure in the suction chamber 19f.

The pressure oil discharged from the discharge chamber 19g is stored in the accumulator 20 through the check valve 21, and the accumulator 20 is switched by switching the direction of the direction switching valve 23.
The pressure oil inside is supplied to the gate cylinder 22, and the gate cylinder 22 extends.

After extending the gate cylinder 22, when the direction of the direction switching valve 23 is switched back to the original direction, the gate cylinder 22 is connected to the suction chamber 19d of the pumping cylinder 19 and the internal pressure of the bias accumulator 24 causes the gate cylinder 22 to move. 22 is shortened, gate cylinder 2
The pressure oil of 2 flows into the suction chamber 19f of the pumping cylinder 19 whose pressure is reduced.

Further, the support frame 3 supports a pair of left and right drive gears 25, which are racks that move up and down in conjunction with the gate cylinder 22, and the bucket body 2 is extended when the gate cylinder 22 extends a certain amount or more. A pair of left and right driven gears 2 each of which is a pinion geared with the drive gear 25 and interlocked with each gate 7 via a transmission shaft 26.
7 is provided.

The concrete bucket 1 is hung from the transfer device 6 by the unloading device 4 on the transfer stage, and the bucket main body 2 is received by the transfer device 6, and then the support frame 3 is further supported by the support portion 12. The bucket body 2 is separated from the support frame 3 by suspending 13 until it is slightly lower than the positioning pin 11.
The bucket main body 2 separated from the support frame 3 is moved by moving the transfer device 6, and the hopper 5 of the dropping stage is moved.
The milk is dropped from the hopper 5 by being transported to the bottom of the container.

The hanger frame 14, the hydraulic circuit 18, and the drive gear 25 remain on the transfer stage while being supported by the support frame 3, and the upper portion of the bucket body 2 carried into the dropping stage is completely open. Milk is directly introduced into the bucket body 2 from the hopper 5 without any trouble.

The bucket main body 2 containing milk at the dropping stage is placed in the support frame 3 of the loading / unloading stage at a height such that the positioning pin 11 of the bucket main body 2 is slightly higher than the supporting portions 12 and 13 by the transfer device 6. And the left and right positioning pins 11 are positioned almost directly above the left and right support portions 12, and the rear positioning pin 11 is stopped almost at a position just above the rear support portion 13.

Thereafter, when the supporting frame 3 is hoisted by the loading / unloading device 4, the supporting frame 3 receives the outer flange 10 of the bucket body 2 from below, and the left and right positioning pins 11 are fitted into the left and right supporting portions 12. Thus, the front and rear position of the bucket body 2 with respect to the support frame 3 and the direction around the vertical axis are positioned so that the support frame 3 lifts the bucket body 2.

At the same time, the rear positioning pin 11 is fitted and received by the rear supporting portion 13, so that the bucket body 2 supported by the supporting frame 3 is tilted rearward so that the driven gear 27 becomes the drive gear 25. It is prevented from coming off the front.

As shown in FIG. 2, a shock absorber 28 is provided in the lower part of the support frame 3, and the shock absorber 28 receives the rear lower part of the support frame 9 of the bucket body 2 to
The bucket main body 2 supported by the support frame 3 is prevented from tilting forward and the driven gear 27 is disengaged rearward from the drive gear 25.

After that, when the concrete bucket 1 is transported to the concrete pouring place by using the unloading device 4 and the direction switching valve 23 is switched by wireless operation, the gate cylinder 22 is extended and each drive gear 25 is driven by each driven gear 25. It meshes with the gear 27, and the gate 7 is opened via each driven gear 27. After that, when milk is completely dropped from the concrete bucket 1 and the direction switching valve 23 is switched back to the original direction by wireless operation, the gate cylinder 22 is shortened and the gate 7 is closed. The closed state is maintained by the spring 8 and the internal pressure of the bias accumulator 24.

The concrete bucket 1 into which milk is dropped and the gate 7 is closed is conveyed by the unloading device 4 to the transfer stage in preparation for the next loading of milk. At the transfer stage, the bucket body 2 and the support frame 2 are suspended from above the carrier device 6 by the loading / unloading device 4, and after the bucket body 2 is received by the carrier device 6, the support frame 3 is further supported by the support portion 12. The bucket main body 2 is separated from the support frame 3 by suspending 13 until it is lower than the positioning pin 11. The bucket body 2 separated from the support frame 3 is conveyed by the conveying device 6 to below the hopper 5 on the dropping stage, and the next milk is dropped from the hopper 5.

After the supporting frame 3 is grounded at the unloading stage, the hanger frame 14 is further hung by the unloading device 4 so that the weight of the hanger frame 14 causes the pumping cylinder 19 to be shortened and the working oil to be pumped. From the suction chamber 19d to the discharge chamber 19e. Then, after that, when the hanger frame 14 is hoisted by the loading / unloading device 4 in order to hoist the loaded bucket body 2, the pumping cylinder 19 is extended by the weight of the support frame 3, the bucket body 2, and the milk stored therein. The pressure oil discharged from the discharge chamber 19e is stored in the accumulator 20 through the check valve 21, and the next time the gate cylinder 22 can be extended.

As described above, in this concrete plant, milk is directly charged into the bucket body 2 from the hopper 5, the bucket body 2 containing the milk is horizontally transported by the transport device 6, and is unloaded at the unloading stage. By simply transferring the bucket body 2 from the carrier device to the support frame 3 by the device 4, milk can be loaded from the hopper 5 to the concrete bucket 1.

That is, it is sufficient that the transfer device 6 is constructed so that the bucket body 2 can be moved horizontally in parallel.
No expensive control device for tilting the bucket containing milk is required, and the facility cost can be significantly reduced.

As the loading / unloading device 4, the bucket body 2
Need only be configured to be lifted via the support frame 3, and the equipment cost can be prevented from increasing by also using the crane for transporting the bucket concrete 1 to the place of placing as described above as the unloading device 4. it can.

By significantly reducing the facility cost in this manner, the cost of loading milk from the hopper 5 into the concrete bucket 1 can be significantly reduced, and the construction cost can be reduced.

In the above-described embodiment, the bucket body 2 is supported by the support pins 12 of the support frame 3 via the positioning pins 11.
However, when the position control of the transfer device 6 is performed with high accuracy and the shake of the support frame 3 when the loading / unloading device 4 is lifted can be suppressed to a predetermined value or less,
The positioning pin 11 and the support portions 12 and 13 may be omitted.

In the above embodiment, since the gates 7 are not interlocked with each other, the driven gears 27 are interlocked with both gates 7 so that the drive gear 25 meshes with each driven gear 27. As in the concrete bucket 1 according to another embodiment of the present invention shown in FIG.
Are linked to each other by, for example, a link 29, the driven gear 27 is linked only to one of the gates 7,
The drive gear 25 may mesh with the driven gear 27.

In this case, the drive gear 26 and the driven gear 27
Since the number of the buckets is reduced, the cost of the concrete bucket 1 can be reduced. Further, here, the driven gear 27 has a small diameter and the stroke of the gate cylinder 22 is made small to reduce the component cost and the cost.

Further, the gate cylinder 2 of the above-mentioned embodiment.
Although 2 is composed of a linear cylinder, it is also possible to use a rotary cylinder as the gate cylinder 22, and when a rotary cylinder is used, a drive gear 25 is used.
As a gear, a pinion, a bevel gear, a worm gear, or the like that can be directly connected to the gate cylinder 22 can be used, or a rack that is interlocked with the gate cylinder 22 via these gears can be used.

Of course, the shape of the bucket body 2 of the present invention is not limited to the conical funnel shape shown in the figure, and it is possible to form, for example, a quadrangular pyramid funnel shape. In this case, the support frame 3 is U-shaped in plan view. It may be formed in.

The support frame 3 and the bucket body 2 are not disassembled, and the support frame 3 is moved to the hanger frame 14.
However, in this case, since the support frame 3 and the hydraulic circuit 18 are moved to the dropping stage together with the bucket main body 2, the load on the transfer device 6 is increased and the bucket main body 2 is also increased. The milk spilled around the bucket body 2 when the milk is dropped onto the bucket body 2 may adhere to the parts of the hydraulic circuit 18, particularly the pumping cylinder 19 and the gate cylinder 22, and cause malfunction of these parts. .

On the other hand, when the bucket body 2 is separated from the support frame 3, the hanger frame 14, the hydraulic circuit 18 and the drive gear 25 as described above and is carried into the dropping stage, the load of the carrier device 6 is increased. In addition to being lighter, there is no risk that milk spilled around the bucket body 2 will accidentally adhere to parts of the hydraulic circuit 18 when the milk is dropped onto the bucket body 2. Also, when milk is dropped onto the bucket body 2, milk that accidentally spills around the bucket body 2 and adheres to the driven gear 27 is not removed when the gate is opened.
5 is eliminated by meshing, the driven gear 27
There is no possibility that the opening / closing of the gate 7 will be defective due to the adhesion of milk to the.

[0054]

As described above, in the concrete bucket of the present invention, the main body of the bucket is detachably supported by the support frame, and the gate cylinder and the drive gear driven by the gate cylinder are supported by the support frame.
When the gate cylinder operates for a certain amount or more, a driven gear that meshes with the drive gear is supported by the bucket body and the gate is interlocked with the driven gear.

Therefore, by separating the bucket main body from the support frame, the upper part of the bucket main body can be completely opened, the bucket main body is carried into the lower side of the hopper, and milk is directly transferred from the hopper to the bucket main body. Can be dropped.

When the bucket body containing milk is supported by the support frame, the drive gear supported by the support frame and the driven gear of the bucket body mesh with each other, supplying and discharging pressure oil to and from the gate cylinder to open and close the gate. Will be able to.

Then, by merely providing a carrying device for carrying the bucket body between the position where the bucket body is unloaded on the support frame and the lower side of the hopper, and an unloading device for unloading the bucket body on the support frame, Milk can be loaded from the hopper into the concrete bucket.

Here, the transporting device may be constructed so that it can be translated in a state where the bucket main body is upright, and an expensive control device for tilting the dump type bucket containing milk becomes unnecessary. The equipment cost of the transfer device can be remarkably reduced, and the equipment cost of the concrete plant can be reduced.

Further, as the loading and unloading device, it is sufficient that the bucket body is configured to be lifted through the supporting frame, and an expensive control device for tilting the dump type bucket is not required. The cost can be reduced.

In particular, when the loading and unloading device is also used as a crane for transporting bucket concrete to the pouring place, an increase in equipment cost can be suppressed, so that the equipment cost of the concrete plant can be further reduced.

As described above, the concrete plant of the present invention includes an unloading device for attaching / detaching the bucket body of the concrete bucket according to the present invention to / from the support frame at the transfer stage, and a dropping stage for the bucket body detached from the support frame. It is provided with a hopper for dropping concrete milk, and a transfer device for transferring the bucket body detached from the support frame between the drop stage and the transfer stage.

Therefore, if the bucket main body is detached from the support frame by the loading / unloading device on the transfer stage and is moved to the lower dropping position of the hopper by the transfer device, there is no hanger frame above the bucket main body. Milk can be dropped directly into the bucket body from. Then, the bucket main body containing the milk is conveyed to the transfer stage by the transfer device, and the bucket main body is supported on the support frame by the loading / unloading device at the transfer stage, whereby the loading of the milk from the hopper into the concrete bucket is completed.

Here, it is sufficient if the bucket main body can be moved horizontally as the transfer device, an expensive control device for tilting the bucket containing milk is not necessary, and the equipment cost of the transfer device is extremely low. Therefore, the equipment cost of the concrete plant can be reduced.

The loading / unloading device only needs to be constructed so that the bucket main body is lifted through the support frame, and an expensive control device for tilting the dump bucket is not required, and the equipment cost of the concrete plant is reduced. Can be made cheaper.

In particular, when the loading / unloading device is also used as a crane for transporting bucket concrete to the pouring place, an increase in equipment cost can be suppressed, so that the equipment cost of the concrete plant can be further reduced.

[Brief description of drawings]

FIG. 1 is a front view of a concrete bucket according to an embodiment of the present invention.

FIG. 2 is a side view of a concrete bucket according to an embodiment of the present invention.

FIG. 3 is a plan view of a concrete bucket according to an embodiment of the present invention.

FIG. 4 is a configuration diagram of a concrete plant according to an embodiment of the present invention.

FIG. 5 is a sectional view of a pumping cylinder according to an embodiment of the present invention.

FIG. 6 is a front view of a concrete bucket according to another embodiment of the present invention.

[Explanation of symbols]

1 concrete bucket 2 bucket body 3 Support frame 4 loading and unloading equipment 5 hopper 6 Conveyor 7 gates 14 Hanger frame 19 pumping cylinder 22 Gate cylinder 25 drive gear 27 Driven gear

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) E04G 21/02 102 E02B 7/00 B66C 3/16

Claims (2)

(57) [Claims] 1. A concrete plant in which a bucket main body is conveyed between a dropping stage on which concrete is dropped and a transfer stage by a conveying device, and is hung by an unloading device between the transfer stage and a concrete placing position. In the above, the bucket body includes a support frame having an outer flange on the top, and a support frame having an opening opening in one direction, the support frame having a support portion for supporting the outer flange. The brim carries the bucket body into the support frame through the opening at a height higher than that of the support portion of the support frame in the transfer stage, and the loading / unloading device moves to the transfer stage. A certain supporting frame is lifted, the outer collar of the bucket body carried in by the carrying device is supported by the supporting portion, and the bucket body is moved to the setting point. After carrying, the bucket main body and the support frame are hung from above the carrying device on the transfer stage, and the carrying device receives the bucket body, and then the supporting part is received by the carrying device. Suspend the support frame until it is lower than the outer brim of the bucket body,
A concrete plant, wherein the bucket body is separated from the support frame. 2. The concrete plant according to claim 1, wherein the support frame is formed in a U shape or a U shape in a plan view.