JP2948067B2 - Driving cart operation method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of operating a carrier truck used for concrete placing work on dams and the like.

[0002]

2. Description of the Related Art Conventionally, there is a concrete driving facility for dam construction as shown in FIG. The concrete driving equipment includes an aggregate bin 101 for storing aggregates such as gravel and crushed stone, and an elevator 110 from the aggregate bin 101.
Kneading plant 10 for receiving the aggregate transported by using the method and kneading the aggregate, cement, water and the like.
2, a transport truck 103 (hereinafter, referred to as a transfer car) for receiving the concrete (hereinafter, referred to as ready-mixed concrete) which has been mixed and kneaded in the concrete kneading plant 102 from the concrete hopper 111 to the vessel 112, and a transfer car 103,
And a tower crane 106 which receives the ready-mixed concrete into a concrete bucket 105 and transports the concrete bucket 105 to a dam 107.

[0003] In the above configuration, the transfer car 103 receiving the ready-mixed concrete from the concrete hopper 111 of the concrete kneading plant 102 travels on the bunker line 104 to move the concrete bucket 1.
Stop at the temporary stop position at a distance of 7 to 8 m from the position where 05 arrives. After the concrete bucket 105 has landed, the transfer car 103 travels at a low speed from the temporary stop position to a position close to the concrete bucket 105 and stops, and thereafter, a gate (not shown) attached to the vessel 112 ) Is opened, the vessel 112 is turned over, the state is maintained for about 10 seconds, and the ready-mixed concrete is transferred to the concrete bucket 105. Then, the concrete bucket 105 into which the ready-mixed concrete is transferred from the transfer car 103
Is lifted by the tower crane 106. Thereafter, the tower crane 106 turns the boom 106a to carry the concrete bucket 105 to a position where the concrete bucket 105 is to be cast on the dam 107 side. And, the concrete bucket 105
Is opened, and ready-mixed concrete is poured into the dam 107.

[0004]

In the above-mentioned concrete pouring equipment, a large amount of ready-mixed concrete is poured into the dam 107.
02 is transferred to the concrete bucket 105 by the transfer car 103, and the concrete bucket 105 is transported by the tower crane 107 to the dam 10
The concrete pouring cycle to be poured into 7 is repeated many times, and the shorter the concrete pouring cycle, the higher the work efficiency.

[0005] By the way, ready-mixed concrete is classified into various types depending on the size and amount of aggregate, the amount of cement, the amount of water, and the like. . When the slump of the ready-mixed concrete is small, that is, when the ready-mixed concrete is hard, the ready-mixed concrete does not flow down from the vessel 112 even when the gate of the transfer car 103 is open. Nevertheless, the transfer car 10
No. 3 runs at a low speed from the temporary stop position to a position close to the concrete bucket 105, stops, and then opens the gate. Thus, there is a problem that the time only for opening the gate of the transfer car 103 is independently spent and the concrete placing cycle becomes longer.

When the slump of the ready-mixed concrete is large, that is, when the ready-mixed concrete is soft,
Keeping the gate open and holding the vessel 112 overturned for about 10 seconds until all of the fluid ready-mixed concrete drips, then returning the vessel 112,
The gate is closed. However, when the slump of the ready-mixed concrete is small, that is, when the ready-mixed concrete is hard, the ready-mixed concrete falls quickly from the inside of the vessel 112, and the mortar component in the ready-mixed concrete does not drop slowly. Therefore, when the slump of the ready-mixed concrete is small, it is only necessary to keep the vessel 112 in the overturned state for a relatively short time with the gate open, but the slump of the ready-mixed concrete is about 10 times as large as the slump of the ready-mixed concrete. The gate is opened for a second and the vessel 112 is turned over. For this reason, the time during which the gate is opened and the vessel 112 is held in the overturned state is unnecessarily long, and the concrete casting cycle is lengthened.

Accordingly, an object of the present invention is to change the time of opening and closing the gate attached to the vessel and the time during which the vessel is overturned according to the size of the slump of the ready-mixed concrete, so that the concrete pouring cycle can be improved. It is an object of the present invention to provide a method of driving a transport vehicle that can be shortened.

[0008]

According to a first aspect of the present invention, there is provided a method of operating a transport trolley, wherein concrete not yet set is stored in a vessel having a gate, and the concrete is transferred from the vessel into a concrete bucket. An operation method of a transporting vehicle to be relocated, wherein when the slump of the concrete in the vessel is smaller than a predetermined value, the vehicle travels by opening the gate from a temporary stop position to a position close to the concrete bucket. Stopping, and when the slump of the concrete in the vessel is greater than the predetermined value,
After traveling and stopping with the gate closed from the temporary stop position to a position close to the concrete bucket, the step of opening the gate, and the step of moving the carriage stopped at a position close to the concrete bucket Overturning the vessel and transferring the concrete to the concrete bucket.

[0009] The method of driving a transport vehicle according to claim 2 is as follows.
A method of operating a transport trolley in which unconsolidated concrete is accommodated in a vessel having a gate and the concrete is transferred from the vessel to a concrete bucket, wherein the transport trolley stopped at a position close to the concrete bucket. Overturning the vessel with the gate open, transferring the concrete in the vessel to the concrete bucket, and overturning the vessel when the slump of the concrete contained in the vessel is smaller than a predetermined value. After returning the vessel after a first time has elapsed,
When the slump of the concrete accommodated in the vessel is greater than the predetermined value, returning the vessel after a second time longer than the first time after overturning the vessel. And

[0010]

According to the operation method of the carrier of the first aspect,
After storing the unset concrete in the vessel having the gate, when the slump of the concrete in the vessel is smaller than a predetermined value, the gate is opened and traveled from the temporary stop position to the position close to the concrete bucket. And stop. On the other hand, when the slump of concrete in the vessel is larger than the predetermined value, the vehicle travels with the gate closed from the temporary stop position to a position close to the concrete bucket and stops, and then the gate of the transport vehicle with the gate closed. open. Then, the vehicle stops at a position close to the concrete bucket, and the vessel of the transport trolley whose gate is open is turned over to transfer the concrete to the concrete bucket.

As described above, when the slump of the concrete in the vessel is small, that is, when the concrete is hard and has no fluidity, the concrete does not flow down from the vessel and reaches the position close to the concrete bucket from the stop position. The time required for the operation of opening the gate after opening the gate and opening the gate after the stoppage of the transport vehicle is not required, so that the time for transferring the concrete to the concrete bucket can be shortened. Therefore, it is possible to shorten a concrete placing cycle of a dam or the like that uses a large amount of concrete, shorten a working time, and reduce costs.

Further, according to the operation method of the transport vehicle of the second aspect, the unset concrete is accommodated in the vessel having the gate. Then, the vessel of the carriage stopped at a position close to the concrete bucket is turned over with the gate open, and the concrete in the vessel is transferred to the concrete bucket. When the slump of the concrete accommodated in the vessel is smaller than a predetermined value, the vessel is returned after the first time has elapsed since the vessel was overturned, and when the slump of the concrete accommodated in the vessel is greater than the predetermined value. The vessel is returned after a second time longer than the first time has elapsed since the vessel was overturned.

As described above, when the slump of the concrete in the vessel is small, that is, when the concrete is hard and has no fluidity, the concrete falls into the concrete buckets quickly, so that it takes a long time before the vessel falls to return. Even if the first time is short, all the concrete can be transferred to the concrete bucket. On the other hand, when the slump of the concrete in the vessel is large, that is, when the concrete is soft and has fluidity, the second time from when the vessel falls down to when it returns is longer than the first time. Since there,
Even if the concrete mortar drips slowly and drops, all the concrete in the vessel can be transferred to the concrete bucket. In this way, since the time during which the vessel falls over is determined according to the state of the concrete, it is possible to shorten the concrete casting cycle of a dam or the like that uses a large amount of concrete, and shorten the working time, Cost can be reduced.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method of operating a transport vehicle (hereinafter, referred to as a transfer car) of the present invention will be described in detail with reference to an embodiment.

FIG. 1 is a side view of a transfer car TC according to an embodiment of the present invention.
An axle 11, 22 having axles 11 and 22 fixed thereto is rotatably mounted at a predetermined interval from each other. A substantially rectangular bogie 2 is fixed on the front of the bogie 1 and is framed in a substantially rectangular parallelepiped shape. Is a rotatably supported upper front portion of the frame base 2, has a substantially rectangular opening, and has a concave portion gradually deepening from front to back. The attached gate 5 is a control panel for controlling the overturning of the vessel 3, opening / closing and running of the gate 4, and 6 is an electric wire reel for winding electric wires (not shown) for supplying electric power to the control panel 5. In the vicinity of the axle 12 on the rear side of the bogie 1, the axle 12 is connected to a drive chain 18 (FIG.
(shown in (b)). On the other hand, an encoder 14 for transmitting the rotation of the axle 11 via a belt 19 and detecting the rotation of the axle 11 is attached near the axle 11 on the front side of the bogie 1. The wheels 8, 8 at both ends of the axles 11, 12 of the transfer car TC roll on rails 50 of a bunker line 104 (shown in FIG. 6) so that the transfer car TC runs. Then, the control panel 5 controls the electric motor 13 to move the transfer car TC forward or backward, and to control the wheel 1 from the encoder 14.
Upon receiving a signal indicating one rotation, the traveling distance of the transfer car TC is determined, and the vehicle travels for a predetermined distance.

On the other hand, the frame base 2 is provided with two substantially U-shaped support members 21 and 21 (only one of which is shown in FIG. 1) having both ends fixed near the upper side surfaces of the carriage 1 respectively. The two frame base vertical members 22 and 22 (only one is shown in FIG. 1) extending from the center of the upper portions of the support members 21 and 21 to the carriage 1 in the vertical direction, and the upper front corner of the support members 21 and 21 are It is composed of a frame base horizontal member 23 connected to each other. Two brackets 24, 24 (shown in FIG. 3) extending diagonally forward and upward are fixed near both ends of the frame base member 23. The vessel 3 is rotatably supported at a portion near the tip of the brackets 24, 24. On the other hand, two abutment members 25, 25 (shown in FIG. 3) for supporting the vessel 3 from both sides are fixed above the portion where the frame base vertical members 22, 22 of the frame base 2 are fixed. A vessel falling jack 16 (shown in FIGS. 1 and 3) is attached vertically between the front bottom of the vessel 3 and the carriage 1. One end of the vessel falling jack 16 on the vessel 3 side is
While rotating along a plane parallel and perpendicular to the traveling direction, the other end of the vessel falling jack 16 is rotatable along a plane parallel to and perpendicular to the traveling direction of the bogie 1. Supported. By pushing up the vessel 3 by the vessel falls jacks 16, the vessel 3, so that tipping in the direction of arrow R ₁ a tip portion near the brackets 24, 24 as a fulcrum.

As shown in FIGS. 1 and 2 (a), the gate 4 has substantially cylindrical fan-shaped side portions 4a, 4a on both sides and a cylindrical surface connecting the outer peripheries of the side portions 4a, 4a to each other. It has a cover portion 4b, and a portion near the apex angle of the substantially fan-shaped side portions 4a, 4a is rotatably supported by the side surface of the vessel 3. One end of the opening / closing jack 17 is attached to the lower side of one of the substantially fan-shaped side surfaces 4 a of the gate 4, and the other end is attached to the side surface of the vessel 3. One end of the opening / closing jack 17 on the gate 4 side rotates along a plane that is parallel and perpendicular to the traveling direction, and the other end of the opening / closing jack 17 is parallel to the vessel 3 and in the traveling direction. It is rotatably supported along a vertical plane. Then, the gate 4 is pushed up by the opening / closing jack 17 so that the gate 4 is moved up and down.
And to open the gate 4 in the direction of the arrow R ₂ in the fulcrum apex portion in the vicinity of 4a. In addition, the vessel falling jack 16 and the opening / closing jack 17 are expanded and contracted by oil fed from a hydraulic unit 15 attached to the center of the bogie 1, and the hydraulic unit 15 is controlled by the control panel 5.

On the other hand, as shown in FIGS. 1 and 2 (b), mounting members 34 and 3 fixed on the front girder 2a of the carriage 1 are provided.
4, rods 33, 33 are respectively fitted and the positioning members 31 are attached to the front ends of the rods 33, 33. The front portion of the positioning member 31 is formed in a concave shape so as to make surface contact with the outer peripheral surface of the concrete bucket 105. And a rod 33, between the positioning member 31 and the mounting members 34, 34,
33, springs 32, 32 are attached to the positioning member 31 respectively.
There is a predetermined space between the mounting members 34 and 34.
The limit switches 41, 41 are attached to the bogie 1 at predetermined intervals from the rear ends of the rods 33, 33 on the extension of the axes of the rods 33, 33. When the transfer car TC advances to the concrete bucket 105 side and the concrete bucket 105 comes into contact with the positioning member 31, the rods 33, 33 are pushed. For this reason, the spring 32,
32 is compressed, and the positioning member 31 and the rods 33, 33 move in the direction of arrow A. The rear ends of the rods 33 contact the limit switches 41, 41, respectively, and the limit switches 41, 41 output an ON signal to the control panel 5.

A limit switch 42 is attached to the support member 21 behind the contact member 25. When the vessel 3 is horizontal, the limit switch 42
An ON signal is output to the control unit 5 by contacting the side surface of the vessel 3. Further, a limit switch 43 is attached to the side of the vessel 3 where the opening / closing jack 17 is attached so as to abut on the side 4a of the gate 4 in a closed state. This limit switch 4
Numeral 2 outputs an ON signal to the control unit 5 when it comes into contact with the gate 4, that is, when the gate 4 is closed.

The concrete placing operation of the dam 107 is performed as follows using the transfer car TC having the above configuration.

First, the transfer car TC closes the gate 4 and keeps the vessel 3 horizontal as shown in FIG.
Stop immediately below the concrete hopper 111 of the concrete kneading plant 102 shown in FIG. Then, in the concrete kneading plant 102 shown in FIG. 6, the ready-mixed concrete in which the aggregate, cement, water, and the like are mixed is received from the concrete hopper 111 to the vessel 3. Thereafter, the transfer car TC travels at high speed toward the landing position of the concrete bucket 105 suspended by the tower crane 106 on the bunker line 104 shown in FIG.

Then, the transfer car TC is
The driving operation is performed according to the flowcharts shown in FIGS.

First, at step S1, the transfer car TC stops at a temporary stop position at a predetermined distance from the landing position of the concrete bucket 105. Next, the process proceeds to step S2, where the concrete bucket 105 is landed at the landing position by the tower crane 106. Next, in step S3, the push button on the operation panel (not shown) of the tower crane 106 is pressed to start the automatic operation of the transfer car TC. When the push button is pressed, the process proceeds to step S4, and the vessel 3
It is determined whether the ready-mixed concrete C stored in the container is hard.
When the slump of the ready-mixed concrete C in the vessel 3 is larger than the predetermined value in step S4, that is, when the ready-mixed concrete C is soft, the process proceeds to step S5. That is, when the fresh concrete C is hard, the process proceeds to step S21. The determination of the size of the slump of the ready-mixed concrete C in the vessel 3 in step S4 is based on a signal indicating the mix type of the ready-mixed concrete C from the concrete kneading plant 102, which is input to the control panel 5, and based on the signal indicating the mix type. This is performed by comparing the slump of the ready-mixed concrete C with a predetermined value. Light is applied to the ready-mixed concrete C in the vessel 3, and the moisture ratio is measured from the degree of reflection of the light, or a rod is inserted into the ready-mixed concrete C to measure the insertion resistance. The magnitude of the slump of the concrete C may be determined.

Then, at step S5, the transfer car TC is advanced at a low speed. Next, it is checked in step S6 whether the limit switches 41, 41 are on. That is, the positioning member 31 is
5, the rods 33, 33 are pushed, and the rods 33, 3
When the rear end of the transfer car TC contacts the limit switch 41 and the limit switch 41 outputs an ON signal to the control panel 5, it is determined that the transfer car TC has arrived at a position close to the concrete bucket 105. Then, in step S6, the concrete bucket 10
When the limit switch 41 that has detected 5 is turned on, the process proceeds to step S7, and the transfer car TC is stopped.
Next, in step S8, oil is fed from the hydraulic unit 15 to the opening / closing jack 17 to open the gate 4. Next, in step S9, the oil is pumped from the hydraulic unit 15 to the vessel falling jack 16 so that the vessel 3 falls. Next, in step S10, the operation of the timer for about 10 seconds as the second time is started. Then, in step S11, the process waits until the timer ends, and when the timer ends, the process proceeds to step S31 shown in FIG. By opening the gate 4 for about 10 seconds by the above timer,
Even if it drips down, the ready-mixed concrete C can be transferred to the concrete bucket 105.

On the other hand, the transfer car TC is advanced at a low speed in step S21, and at the same time, an operation of opening the gate 4 is performed in step S24. Next, in step S22, it is checked whether the limit switches 41, 41 are on. That is, it is determined that the transfer car TC has arrived at a position close to the concrete bucket 105. Then, in step S22, the concrete bucket 1
When the limit switch 41 for detecting 05 is turned on, the process proceeds to step S23, and the transfer car TC is stopped. By this time, the gate 4 has been opened in step S24. Next, in step S25, the vessel 3 is turned over, and the ready-mixed concrete C is transferred to the concrete bucket 105. Then, the process proceeds to step S31 shown in FIG. Note that the time as the first time from when the vessel 3 falls down in step S25 to when the process proceeds to step S31 is much longer than the above-mentioned second time of about 10 seconds since the ready-mixed concrete C falls quickly. Can be shortened.

Next, in FIG. 5, the transfer car TC is retreated at a low speed of about 2 m in step S31, and the process proceeds to step S32, where the concrete bucket 105 is lifted by the tower crane 106. Next, in step S33, the hydraulic unit 1
Oil is pumped from 5 and the vessel 3 is returned. And
In step S34, the output of the limit switch 42 is checked to determine whether the vessel 3 has become horizontal. If the limit switch 42 is ON, it is determined that the vessel 3 has returned, and the process proceeds to step S35.
Is off, the process returns to step S33. Then, in step S35, oil is fed from the hydraulic unit 15 to the opening / closing jack 17 to close the gate 4. Next, step S
Whether the gate 4 is closed at 36
Is output, and when the limit switch 43 is on, it is determined that the gate 4 is closed, and the process proceeds to step S37, whereas when the limit switch 43 is off, the process returns to step S35. Next, at step S37, the transfer car TC is retreated at high speed, and at step S38, it is checked whether or not the transfer car TC has been retracted to a predetermined deceleration position. If not, the process returns to step S37. . On the other hand, when the transfer car TC has retreated to the deceleration position in step S38, the process proceeds to step S39. Then, step S39
To decelerate the transfer car TC and retreat.
At 40, it is confirmed whether or not the transfer car TC has retreated to the position of the predetermined origin, and if it has not retreated to the position of the origin, the process returns to step S39. on the other hand,
When the transfer car TC has retreated to the position of the origin in step S40, the process proceeds to step S41. Next, it is confirmed in step S41 whether or not the placing has been completed. If the placing has been completed, the concrete placing process is terminated. If not, the process proceeds to step 42 and the loading standby state is established. This concrete placing process is repeated.

As described above, when the slump of the ready-mixed concrete C is smaller than the predetermined value, that is, when the ready-mixed concrete C is hard and has no fluidity, the concrete C flows down from the vessel 3 even if the gate 4 is opened. Since the transfer car TC does not exist, the gate 4 can be simultaneously opened while moving forward at a low speed from the temporary stop position to the position close to the concrete bucket 105. Therefore, the time for opening the gate 4 after the stop of the transfer car TC is not required, so that the concrete C of the transfer car TC is not required.
Can be shortened for transferring to the concrete bucket 105.

When the slump of the ready-mixed concrete C is smaller than the predetermined value, when the vessel 3 is turned over, the hard and non-flowable ready-mixed concrete C in the vessel 3 falls into the concrete bucket 105 quickly and quickly. Even if the first time from when the vessel 3 falls down to when it returns is shortened, all the concrete C can be transferred to the concrete bucket 105. On the other hand, when the slump of the ready-mixed concrete C is larger than the predetermined value, that is, when the ready-mixed concrete C is soft and fluid, the second time from when the vessel 3 is overturned to when it is returned is set to the second time. Since the time is longer than 1, the entire ready-mixed concrete C in the vessel 3 can be transferred to the concrete bucket 105 even if the concrete C drips down slowly.

Therefore, the dam 1 using a large amount of ready-mixed concrete C is changed by changing the timing of opening the gate 4 and the time from the fall of the vessel 3 to the return thereof according to the size of the slump of the ready-mixed concrete C.
07 and the like can be shortened, the working time can be greatly reduced, and the cost can be reduced.

In the above embodiment, concrete is poured into the dam 107 by using the transfer car TC. However, the present invention is not limited to the dam, and the present invention can be applied to concrete that is used to cast concrete in large quantities. May be applied.

[0031]

As is apparent from the above description, according to the method for operating a transport vehicle of the first aspect of the present invention, concrete not yet set in a vessel having a gate is accommodated, and the slump of concrete in the vessel is less than a predetermined value. When it is small, the gate is opened and travels and stops between the temporary stop position and the position close to the concrete bucket, and when the slump of concrete in the vessel is larger than a predetermined value, the concrete stops from the temporary stop position. A transport trolley that travels and stops with the gate closed to a position close to the bucket, stops at a position close to the concrete bucket, opens the gate, and stops at a position close to the concrete bucket Of the above concrete into a concrete bucket It is intended to set.

Therefore, according to the method of operating the transport vehicle of the first aspect of the present invention, when the slump of the concrete in the vessel is small, that is, when the concrete is hard and has no fluidity, there is no possibility that the concrete will flow down from the vessel. Therefore, the vehicle runs with the gate opened between the stop position and the position close to the concrete bucket. For this reason, the time for opening the gate after stopping at the position close to the concrete bucket is not required, so that the time for transferring the concrete in the vessel to the concrete bucket can be shortened. Therefore, it is possible to shorten a concrete placing cycle of a dam or the like that uses a large amount of concrete, shorten a working time, and reduce costs.

According to a second aspect of the present invention, there is provided a method of operating a transport vehicle, wherein the unconsolidated concrete is accommodated in a vessel having a gate, and the transport vehicle stopped at a position close to the concrete bucket is moved to the gate. When the concrete in the vessel is moved to a concrete bucket while falling over in an open state, and the slump of the concrete accommodated in the vessel is smaller than a predetermined value, the vessel is moved after a lapse of a first time after the vessel is overturned. On the other hand, when the slump of the concrete accommodated in the vessel is larger than a predetermined value, the vessel is returned after a second time longer than the first time has elapsed since the vessel was overturned.

Therefore, according to the operation method of the carrier of the present invention, when the slump of the concrete in the vessel is small, that is, when the concrete is hard and has no fluidity, the concrete is gathered in the concrete bucket quickly. In order to fall, the first time between the time when the vessel falls and the time when the vessel returns is shortened, and the time for transferring the concrete in the vessel to the concrete bucket is shortened. On the other hand, when the slump of the concrete in the vessel is large, that is, when the concrete is soft and has fluidity, the second time from when the vessel is overturned to when the vessel returns is longer than the first time. Even if the concrete falls slowly while dripping, all the concrete in the vessel can be transferred to the concrete bucket. In this way, since the time during which the vessel falls over is determined according to the state of the concrete, it is possible to shorten the concrete casting cycle of a dam or the like that uses a large amount of concrete, and shorten the working time, Cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view of a transfer car according to an embodiment of the present invention.

FIG. 2 (a) is a view as seen from above the transfer car, and FIG. 2 (b) is a view as seen from above with a vessel and an upper portion of a frame base removed from the transfer car.

FIG. 3 is a front view of the transfer car.

FIG. 4 is a flowchart showing an operation of the transfer car until the vessel falls.

FIG. 5 is a flowchart showing the operation of the transfer car after the vessel falls.

FIG. 6 is a schematic diagram of a concrete placing facility using the transfer car.

[Explanation of symbols]

TC… Transfer car, 1… Bogie, 2… Frame stand, 3…
Vessel, 4 gate, 5 control panel, 6 wire reel,
8 wheel, 11, 12 axle, 13 electric motor, 14 encoder, 15 hydraulic unit, 16 vessel overturning jack, 17 opening / closing jack, 18 driving chain, 1
9 ... belt, 21 ... support member, 22 ... vertical frame member, 23 ...
Frame base horizontal member, 24 bracket, 25 contact member, 31 positioning member, 32 spring, 33 rod, 34 mounting member, 4
1, 42, 43: Limit switch, 50: Rail.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E04G 21/02

Claims (2)

(57) [Claims] 1. A method of operating a transport trolley for transferring unconsolidated concrete into a vessel having a gate and transferring the concrete from the vessel to a concrete bucket, wherein a slump of the concrete in the vessel is a predetermined value. When the difference is smaller than the temporary stop position, the gate is opened and travels to a position close to the concrete bucket to reach a position to stop, and when the slump of the concrete in the vessel is larger than the predetermined value, Opening the gate after running and stopping with the gate closed from the temporary stop position to a position close to the concrete bucket, and opening the gate; and setting the transport vehicle stopped at a position close to the concrete bucket. Overturn the vessel and remove the concrete Relocating to the concrete bucket. 2. A method of operating a transport trolley, wherein unconsolidated concrete is accommodated in a vessel having a gate, and the concrete is transferred from the vessel to a concrete bucket, wherein the carrier stops at a position close to the concrete bucket. Moving the concrete in the vessel to the concrete bucket by overturning the vessel with the gate open, and when the slump of the concrete contained in the vessel is smaller than a predetermined value. When the sled of the concrete accommodated in the vessel is larger than the predetermined value while returning the vessel after a lapse of a first time after the vessel is overturned, the vessel is overturned and the first After a second time longer than the time How the operation of the transport carriage, characterized in that a step of returning the vessel.