JP2020146669A - Self-propelled screen - Google Patents

Abstract

To provide a self-propelled screen which has both of stability and operability during running.SOLUTION: A self-propelled screen comprises: a running body; a sieve device; a first conveyor; a second conveyor of which a posture can be changed to a development posture and a storage posture; a running operation part; a notification device; a conveyor sensor; and a controller for controlling operation of the self-propelled screen. The controller notifies that the second conveyor is put in the storage posture through the notification device when running operation is performed in the state that the development posture is detected by the conveyor sensor, and stops the running body when a prescribed time has lapsed since the notification was started.SELECTED DRAWING: Figure 7

Description

The present invention relates to a self-propelled screen that sorts objects to be sorted according to their particle size.

Conventionally, a self-propelled screen that sorts objects to be sorted according to the particle size has been known. Further, in such a self-propelled screen, in order to suppress an unexpected running operation, there is a technique for automatically stopping the engine when a state satisfying a predetermined condition continues for a set time (see, for example, Patent Document 1). ).

Further, as one of the variations of the self-propelled screen, a self-propelled screen including an over-conveyor that discharges an object to be sorted having a particle size equal to or larger than the threshold value in addition to a conveyor that discharges an object to be sorted having a particle size less than the threshold value. Exists. The overconveyor is used in a state of being deployed outside the width of the self-propelled screen and is stored inside the width of the self-propelled screen during traveling.

Japanese Unexamined Patent Publication No. 2012-101165

If the self-propelled screen is run with the overconveyor deployed, the posture may become unstable and it may come into contact with surrounding obstacles. Therefore, if the self-propelled screen is run in a state where the overconveyor is deployed by using the technique described in Patent Document 1, it is conceivable that the engine is stopped at the timing when the set time elapses.

However, in such a configuration, even when moving a short distance in an environment where the surrounding safety is ensured, it is necessary to store the overconveyor before moving and deploy the overconveyor again after moving, so that operability Creates a new challenge of being excessively reduced.

The present invention has been made in view of the above-mentioned actual conditions, and an object of the present invention is to provide a self-propelled screen having both stability and operability during traveling.

In order to achieve the above object, one aspect of the self-propelled screen according to the present invention is a traveling body, a sieve device for sorting objects to be sorted according to the particle size, and the self-propelled screen from the sieve device. A first conveyor that extends in the front-rear direction and discharges objects to be sorted that are less than the threshold particle size selected by the sieving device, and a deployment that extends from the sieving device to the outside of the width of the self-propelled screen. A second posture that changes to the posture and the storage posture stored inside the width of the self-propelled screen, and discharges the objects to be sorted having the threshold particle size or more sorted by the sieve device in the deployed posture. The second in a self-propelled screen including a conveyor, a traveling operation unit that receives a traveling operation that instructs the traveling body to travel, and a stopping operation that instructs the traveling body to stop, and a notification device that notifies information. A conveyor sensor for detecting the posture of the conveyor and a controller for controlling the operation of the self-propelled screen are provided, and the running operation is performed in the state where the deployed posture is detected by the conveyor sensor. In this case, the second conveyor is notified through the notification device that the second conveyor is in the retracted posture, and the traveling body is stopped when a predetermined time has elapsed from the start of the notification.

According to the self-propelled screen of the present invention, both stability and operability during traveling can be achieved. Issues, configurations, and effects other than those described above will be clarified by the following description of the embodiments.

It is a side view of the self-propelled screen which concerns on this embodiment. It is a top view of the self-propelled screen in which the overconveyor is in the deployed state. It is a top view of the self-propelled screen in which the overconveyor is stored. It is a figure which shows the operation selection dial. It is a figure which shows the rotation speed selection lever. It is a block diagram of a self-propelled screen. This is an example of a control table held by the controller. It is a flowchart of operation control processing. It is a flowchart of a running regulation process.

Hereinafter, the self-propelled screen according to the embodiment of the present invention will be described with reference to the drawings. In each embodiment, the same components are designated by the same reference numerals, and duplicate description will be omitted. In addition, each embodiment can be combined in any combination as long as the gist of the present invention is not changed.

FIG. 1 is a side view of the self-propelled screen 1 according to the present embodiment. FIG. 2 is a plan view of the self-propelled screen 1 in which the overconveyor 40 is in the deployed state. FIG. 3 is a plan view of the self-propelled screen 1 in which the overconveyor 40 is stored. The figure in the circle of FIG. 3 is a partial side view of the periphery of the overconveyor 40 and the second cylinder 46 as viewed from the left side of the self-propelled screen 1.

As shown in FIG. 1, the self-propelled screen 1 mainly includes a traveling body 10, a sieving device 20, a main conveyor (first conveyor) 30, an over conveyor (second conveyor) 40, and a power unit 50. Be prepared.

The self-propelled screen 1 is a device that self-propells to a working position by a traveling body 10 and vibrates a sieve device 20 at the working position to sort objects to be sorted according to the particle size. More specifically, in the self-propelled screen 1, among the input objects to be sorted, the objects to be sorted having a particle size less than the threshold particle size are discharged through the main conveyor 30, and the objects to be sorted having a particle size equal to or larger than the threshold particle size are discharged. The object is discharged through the overconveyor 40. The object to be sorted refers to a mixture of a plurality of particles having different particle sizes, such as rubble in which large and small fragments are mixed and earth and sand in which gravel is mixed.

The traveling body 10 is composed of a pair of endless tracks 11 and a support frame 12 supported by the pair of endless tracks 11. The pair of endless tracks 11 rotate by transmitting the driving force of a hydraulic motor (not shown) driven by the engine 52 (see FIG. 6). As shown in FIG. 3, when the overconveyor 40 is in the retracted posture, the outer ends of the pair of endless tracks 11 are located on the outermost side of the self-propelled screen 1 in the left-right direction (width direction). Hereinafter, the distance between the outer ends of the pair of endless tracks 11 is defined as the "width of the self-propelled screen 1".

The sieving device 20 is supported by the support frame 12. More specifically, the sieving device 20 is supported by the support frame 12 so as to be inclined downward from the front side to the rear side of the self-propelled screen 1. The sieving device 20 mainly includes a housing 21, a wire mesh 22, a plurality of rubber springs 23, and a hydraulic motor 24.

The housing 21 is composed of a side wall 21a that defines the front end and the left and right ends of the sieving device 20, and a bottom wall 21b that is arranged below the side wall 21a. The upper surface, lower surface, and back surface of the side wall 21a are open. Further, the bottom wall 21b is arranged below the side wall 21a at a predetermined distance from the lower end of the side wall 21a. Further, the bottom wall 21b is formed with a discharge port 21c that penetrates in the vertical direction.

The wire mesh 22 is arranged inside the side wall 21a. The wire mesh 22 is a member having a mesh structure provided with a plurality of through holes. Further, one of a plurality of wire meshes 22 having different diameters of the through holes can be selectively attached to the side wall 21a. Then, by appropriately selecting the diameter of the through hole, the threshold particle size at the time of sorting the object to be sorted is adjusted.

The plurality of rubber springs 23 support the side wall 21a with respect to the bottom wall 21b. In the present embodiment, the side wall 21a is supported by the bottom wall 21b via the rubber spring 23 at two locations (four locations in total) on the front side and the rear side of the left end and the right end of the side wall 21a, respectively. The hydraulic motor 24 vibrates the side wall 21a by transmitting the driving force of the engine 52 to rotate the hydraulic motor 24.

The object to be sorted is thrown into the housing 21 from the upper surface of the open side wall 21a by a hydraulic excavator or the like. The input object to be sorted is placed on the wire mesh 22. Then, when the hydraulic motor 24 is rotated with the object to be sorted loaded, the side wall 21a and the wire mesh 22 vibrate. At this time, among the objects to be sorted that have been put into the housing 21, the objects to be sorted whose particle size is smaller than the diameter of the through hole of the wire mesh 22 pass through the through hole of the wire mesh 22 and are transmitted from the discharge port 21c of the bottom wall 21b. It is discharged. On the other hand, the object to be sorted having a particle size equal to or larger than the diameter of the through hole of the wire mesh 22 does not pass through the through hole of the wire mesh 22, moves rearward along the inclination, and is discharged from the back surface of the opened side wall 21a. To.

The main conveyor 30 discharges the object to be sorted, whose particle size is less than the threshold particle size, discharged from the discharge port 21c to the outside of the self-propelled screen 1. The main conveyor 30 is supported by the support frame 12 below the bottom wall 21b (more specifically, the discharge port 21c). Further, the main conveyor 30 extends in the front-rear direction of the self-propelled screen 1. Further, the main conveyor 30 is supported by the support frame 12 so as to have an ascending inclination from the rear side to the front side of the self-propelled screen 1.

The main conveyor 30 includes a conveyor frame 31, a head pulley 32 rotatably supported at the tip of the conveyor frame 31, a tail pulley rotatably supported at the base end of the conveyor frame 31 (not shown), and a head pulley 32. It mainly includes an endless annular conveyor belt 33 hung on the tail pulley, a hydraulic motor 34 that rotates by transmitting the driving force of the engine 52, and a tilt cylinder 35 that adjusts the inclination angle of the main conveyor 30.

When the driving force of the hydraulic motor 34 is transmitted to the head pulley 32, the conveyor belt 33 rotates. As a result, the object to be sorted discharged from the discharge port 21c is conveyed forward and discharged from the tip of the main conveyor 30 to the outside of the self-propelled screen 1. That is, the objects to be sorted whose particle size is less than the threshold particle size are piled up in front of the self-propelled screen 1 and directly below the tip of the main conveyor 30. Further, by expanding and contracting the tilt cylinder 35, the inclination angle of the main conveyor 30 can be adjusted according to the properties of the object to be sorted.

The over-conveyor 40 discharges the object to be sorted, whose particle size discharged from the back surface of the side wall 21a is equal to or larger than the threshold particle size, to the outside of the self-propelled screen 1. The overconveyor 40 is supported by the support frame 12 behind the housing 21 and directly below the back surface of the open side wall 21a. Further, the overconveyor 40 has a deployment posture extending to the outside of the width of the self-propelled screen 1 (FIG. 2) and a storage posture stored inside the width of the self-propelled screen 1 (FIG. 3). It is configured so that the posture can be changed.

As shown in FIGS. 1 to 3, the overconveyor 40 is rotatably supported by the conveyor frame 41, the head pulley 42 rotatably supported by the tip of the conveyor frame 41, and the base end of the conveyor frame 41. The tail pulley (not shown), the endless annular conveyor belt 43 hung on the head pulley 42 and the tail pulley, the hydraulic motor 44 that rotates by transmitting the driving force of the engine 52, and the hydraulic pressure that changes the posture of the overconveyor 40. Mainly includes cylinders 45 and 46.

When the driving force of the hydraulic motor 44 is transmitted to the head pulley 42 when the overconveyor 40 is in the deployed posture, the conveyor belt 43 rotates. As a result, the object to be sorted discharged from the back surface of the opened side wall 21a is conveyed to the left and discharged from the tip of the overconveyor 40 to the outside of the self-propelled screen 1. That is, the objects to be sorted whose particle size is less than the threshold particle size are piled up on the left side of the self-propelled screen 1 and directly below the tip of the overconveyor 40.

Further, the conveyor frame 41 is composed of a front end side frame 41a and a base end side frame 41b adjacent to the overconveyor 40 in the extending direction. The tip side frame 41a supports the head pulley 42 and the hydraulic motor 44. The base end side frame 41b supports the tail pulley and is supported by the support frame 12.

One end of the first cylinder 45 is connected to the support frame 12, and the other end is connected to the tip end side frame 41a. Then, when the first cylinder 45 is extended as shown in FIG. 2, the conveyor frame 41 is in a state in which the front end side frame 41a and the base end side frame 41b are linearly arranged. On the other hand, in the conveyor frame 41, when the first cylinder 45 is reduced as shown in FIG. 3, the tip end side frame 41a and the proximal end side frame 41b are bent at the connecting portion.

One end of the second cylinder 46 is connected to the support frame 12, and the other end is connected to the base end side frame 41b. Then, when the second cylinder 46 of the conveyor frame 41 is reduced as shown in FIG. 2, the transport surface of the conveyor belt 43 faces upward. On the other hand, in the conveyor frame 41, when the second cylinder 46 is extended as shown in FIG. 3, the transport surface of the conveyor belt 43 faces rearward.

That is, as shown in FIG. 2, the overconveyor 40 is in the deployed posture in a state where the first cylinder 45 is extended and the second cylinder 46 is contracted. On the other hand, as shown in FIG. 3, the overconveyor 40 is in the retracted posture in a state where the first cylinder 45 is contracted and the second cylinder 46 is extended.

When changing the posture of the overconveyor 40 from the deployed posture to the retracted posture, first, the second cylinder 46 is extended with the first cylinder 45 extended. Next, with the second cylinder 46 extended, the first cylinder 45 is reduced. On the other hand, when changing the posture of the overconveyor 40 from the retracted posture to the deployed posture, first, the first cylinder 45 is extended with the second cylinder 46 extended. Next, with the first cylinder 45 extended, the second cylinder 46 is reduced.

The hydraulic cylinders 45 and 46 are provided with limit switches 47 and 48 (see FIG. 6) for detecting their respective expansion and contraction states. In other words, the limit switches (conveyor sensors) 47 and 48 detect the attitude of the overconveyor 40. The limit switch 47 outputs a detection signal to the controller 70 (see FIG. 6) when the first cylinder 45 is reduced. The limit switch 48 outputs a detection signal to the controller 70 when the second cylinder 46 is extended.

The power unit 50 is a unit that generates a driving force for operating the self-propelled screen 1. The power unit 50 is supported by the support frame 12 in front of the pair of endless tracks 11 and below the main conveyor 30. The power unit 50 includes a housing 51, an engine 52 housed in the housing 51, and a pilot pump 53 (see FIG. 6). The pilot pump 53 rotates by transmitting the driving force of the engine 52, and pumps the hydraulic oil stored in the hydraulic oil tank 54 to the traveling operation lever 63 (see FIG. 6) or the like as pilot pressure oil.

Further, the self-propelled screen 1 includes an operation device (lever, switch, dial, etc.) that receives an operator's operation. Then, when the operator operates the operating device, the traveling body 10 travels, the sieving device 20 vibrates, the conveyors 30 and 40 rotate, and the overconveyor 40 changes its posture.

The operation device includes at least an operation selection dial 61 (see FIG. 4), a rotation speed selection lever 62 (see FIG. 5), and a pair of traveling operation levers 63 (see FIG. 6). FIG. 4 is a diagram showing an operation selection dial 61. FIG. 5 is a diagram showing a rotation speed selection lever 62. FIG. 6 is a block diagram showing a part of the controller 70 and the hydraulic circuit mounted on the self-propelled screen 1.

The operation selection dial 61 is an operation unit for allowing the operator to select the operation mode of the self-propelled screen 1. More specifically, the operation selection dial 61 sets the maintenance position for setting the self-propelled screen 1 in the maintenance mode, the working position for setting the self-propelled screen 1 in the work mode, and the traveling for setting the self-propelled screen 1 in the running mode. It is possible to switch to the mode. Then, the operation selection dial 61 outputs a position signal indicating the current position to the controller 70. The operation selection dial 61 is, for example, an alternate switch.

The maintenance mode is a mode in which the posture of the overconveyor 40 can be changed. That is, the operator can change the posture of the overconveyor 40 by operating an operation unit (not shown) that expands and contracts each of the hydraulic cylinders 45 and 46 while the operation selection dial 61 is rotated to the maintenance position. ..

The working mode is a mode in which the sieving device 20 can be operated. That is, the operator selects the objects to be sorted according to the particle size by operating the operation unit (not shown) that drives and stops the hydraulic motor 24 while rotating the operation selection dial 61 to the working position. be able to.

The traveling mode is a mode in which the traveling body 10 can be driven. That is, the operator can travel the traveling body 10 by operating the traveling operation lever 63 with the operation selection dial 61 rotated to the traveling position.

The rotation speed selection lever 62 is an engine operation unit that controls an upper limit value of the rotation speed of the engine 52. More specifically, the rotation speed selection lever 62 can be switched between a restricted position for putting the engine 52 in the low idle state and a release position for putting the engine 52 in the high idle state. The rotation speed selection lever 62 is, for example, an alternate switch.

The low idle state is a state in which the rotation speed of the engine 52 is regulated to be less than the threshold rotation speed. That is, when the traveling operation lever 63 is operated with the rotation speed selection lever 62 moved to the regulated position, the self-propelled screen 1 travels at an extremely slow speed. On the other hand, the high idle state is a state in which the above-mentioned regulation of the engine speed of the engine 52 is released. That is, if the traveling operation lever 63 is operated with the rotation speed selection lever 62 moved to the release position, the self-propelled screen 1 travels at a higher speed than in the low idle state.

The rotation speed selection lever 62 is provided with a limit switch (operation unit sensor) 64 for detecting the current position. The limit switch 64 outputs a detection signal to the controller 70 when the rotation speed selection lever 62 is located at the regulated position.

The pair of traveling operation levers 63 are traveling operation units that control the rotation and stop of the corresponding endless track 11. The operator performs a traveling operation for instructing the rotation of the endless track 11 (that is, traveling of the traveling body 10) and a stopping operation for instructing the rotation stop of the endless track 11 (that is, stopping the traveling body 10). It can be done for 63.

The traveling operation refers to, for example, an operation of tilting the traveling operation lever 63 from the neutral position shown in FIG. More specifically, when the traveling operation lever 63 is laid down on one side, the endless track 11 rotates in the direction in which the self-propelled screen 1 is advanced. Further, when the traveling operation lever 63 is laid down on the other side, the endless track 11 rotates in the direction in which the self-propelled screen 1 is moved backward.

The stop operation refers to, for example, an operation of returning the traveling operation lever 63 to the neutral position shown in FIG. When the traveling operation lever 63 is configured to return to the neutral position when the hand is released in the laid-down state, the stop operation refers to the operation of releasing the hand from the traveling operation lever 63.

The pilot pump 53 pumps the hydraulic oil stored in the hydraulic oil tank 54 to the pilot valve of the traveling operation lever 63 as pilot pressure oil. Then, the pilot valve switches the output destination and the output amount of the pilot pressure oil supplied from the pilot pump 53 according to the lodging direction and the lodging amount of the traveling operation lever 63.

The pilot pressure oil output from the pilot valve (hereinafter referred to as "running pilot pressure") is supplied to the pilot port of the directional control valve, and is supplied from the main pump (not shown) to the hydraulic motor on the endless track 11. Control the supply direction and supply amount of hydraulic oil.

The cutoff valve 55 is arranged in the flow path of the pilot pressure oil from the pilot pump 53 to the pilot valve of the traveling operation lever 63. The cutoff valve 55 is configured to be switchable between a shutoff position A for shutting off the pilot pressure oil and a distribution position B for circulating the pilot pressure oil. The initial position of the cutoff valve 55 is the cutoff position A. Then, the cutoff valve 55 is switched to the distribution position B only while the control voltage is applied from the controller 70.

The pressure sensor 56 detects the traveling pilot pressure output from the pilot valve of the traveling operation lever 63, and outputs a pressure signal indicating the detected pilot pressure to the controller 70. In other words, the pressure sensor 56 detects the amount of operation of the traveling operation lever 63. In other words, the pressure sensor 56 detects whether or not the traveling body 10 is traveling.

The controller 70 includes a CPU (Central Processing Unit) 71, a ROM (Read Only Memory) 72, and a RAM (Random Access Memory) 73. The controller 70 realizes the processing described later by reading and executing the program stored in the ROM 72 by the CPU 71. The RAM 73 is used as a work area when the CPU 71 executes a program.

However, the specific configuration of the controller 70 is not limited to this, and may be realized by hardware such as an ASIC (Application Specific Integrated Circuit) and an FPGA (Field-Programmable Gate Array).

The controller 70 according to the present embodiment is based on the position signal output from the operation selection dial 61, the detection signal output from the limit switches 47, 48, 64, and the pressure signal output from the pressure sensor 56, and the engine 52. , Cutoff valve 55, and notification device 74 are controlled. Specific processing executed by the controller 70 will be described later with reference to FIGS. 8 and 9.

The notification device 74 is a device that notifies the operator of information. The specific configuration of the notification device 74 is not particularly limited, but for example, a display that displays information (characters, images), a speaker that outputs voice or warning sound, an LED lamp that lights up or blinks, a patrol light (registered trademark), and the like are included. Applicable.

FIG. 7 is an example of a control table held by the controller 70. The control table may be defined in the source code of the program stored in the ROM 72, or may be defined in the setting file stored in the ROM 72 or the RAM 73, and may be read when the program is executed. The control table is a table that is referred to when controlling the traveling state of the self-propelled screen 1 in the traveling regulation processing described later.

As shown in FIG. 7, for example, the control table holds the regulation status, the set time, and the regulation content in association with each other. However, the number of regulation statuses, the set time, and the regulation contents shown in the control table are not limited to the example of FIG.

The regulation status indicates the regulation level of the running state of the self-propelled screen 1. The regulation status in this embodiment has five stages from 0 to 4, and the larger the value, the higher the regulation level. The set time refers to the elapsed time from the start of the driving regulation process to the transition to the corresponding regulation status. In this embodiment, the set time is set only for the regulation statuses 2 to 4. Regulation content refers to the specific content of the regulation that is enforced in the corresponding regulatory status.

Next, a process in which the controller 70 controls the self-propelled screen 1 will be described with reference to FIGS. 8 and 9. FIG. 8 is a flowchart of the operation control process. FIG. 9 is a flowchart of the traveling regulation process.

First, the controller 70 determines the position of the operation selection dial 61 based on the position signal output from the operation selection dial 61 (S11). Then, when the controller 70 determines that the operation selection dial 61 is the working position (S11: Yes), the controller 70 substitutes 0 for the regulation status i (S12) to shift the self-propelled screen 1 to the working mode (S11: Yes). S13).

The regulation status i is a variable stored in the RAM 73. Then, a value indicating the current regulation status is set in the regulation status i. That is, any of 0 to 4 is set for the regulation status i according to the present embodiment.

As shown in FIG. 7, since there is no regulation corresponding to the regulation status i = 0, the controller 70 does not execute the regulation for the self-propelled screen 1. Further, when a numerical value other than 0 is assigned to the regulation status i immediately before step S12, the controller 70 releases the regulation corresponding to the regulation status i in step S12. Further, the self-propelled screen 1 in the working mode operates the sieving device 20, the main conveyor 30, and the overconveyor 40 according to the operator's operation on the operating device. These processes continue until the position of the operation selection dial 61 is switched.

Next, when the controller 70 determines that the operation selection dial 61 is the traveling position (S11: No), the controller 70 determines the posture of the overconveyor 40 based on the detection signals output from the limit switches 47 and 48 (S11: No). S14). The controller 70 determines that the overconveyor 40 is in the retracted posture when the detection signals are output from both the limit switches 47 and 48. On the other hand, the controller 70 determines that the overconveyor 40 is in the deployed posture when the detection signals are not output from both the limit switches 47 and 48.

Then, when the controller 70 determines that the overconveyor 40 is in the retracted posture (S14: Yes), the controller 70 substitutes 0 for the regulation status i (S15) and shifts the self-propelled screen 1 to the traveling mode (S16). ). Since the process of step S15 is common to that of step S12, the description thereof will be omitted again. Further, the controller 70 causes the traveling body 10 to travel according to the operation of the operator with respect to the operating device. These processes continue until the position of the operation selection dial 61 is switched.

On the other hand, when the controller 70 determines that the overconveyor 40 is in the deployed posture (S14: No), the controller 70 determines whether or not the self-propelled screen 1 is in the low idle state based on the detection signal output from the limit switch 64. Judgment (S17). When the detection signal is output from the limit switch 64, the controller 70 determines that it is in the low idle state (the rotation speed selection lever 62 is the regulated position). On the other hand, when the detection signal is not output from the limit switch 64, the controller 70 determines that it is in the high idle state (the rotation speed selection lever 62 is in the release position).

Then, when the controller 70 determines that the self-propelled screen 1 is in the low idle state (S17: Yes), the controller 70 executes the processes of steps S15 and S16 described above. That is, the operator can move the self-propelled screen 1 at a low speed while keeping the overconveyor 40 in the deployed posture.

On the other hand, when the controller 70 determines that the self-propelled screen 1 is in the high idle state (S17: No), whether or not the traveling pilot pressure is equal to or less than the threshold pressure based on the pressure signal output from the pressure sensor 56. Is determined (S18). The threshold pressure according to this embodiment is 0. However, the value is not limited to 0 as long as it can be determined that the traveling body 10 is substantially stopped. That is, in step S18, the controller 70 determines whether or not the traveling body 10 is traveling.

Then, when it is determined that the traveling pilot pressure is equal to or less than the threshold pressure (S18: No), the controller 70 repeatedly executes the determinations of steps S11, S14, S17, and S18. That is, if the operator switches the operation selection dial 61 to the working position (S11: Yes), changes the posture of the overconveyor 40 to the retracted posture (S14: Yes), or switches the rotation speed selection lever 62 to the regulated position (S11: Yes). S17: Yes), steps S12, S13, S15, and S16 described above are executed. On the other hand, when the operator tilts the travel operation lever 63 and the travel pilot pressure becomes larger than the threshold pressure (S18: Yes), the controller 70 executes the travel regulation process (S19).

That is, in the controller 70, when the operation selection dial 61 is in the traveling position (S11: No), the overconveyor 40 is in the deployed posture (S14: No), and the self-propelled screen 1 is in the high idle state (S17: No). ), When the operator performs a traveling operation on the traveling operation lever 63 (S18: Yes), the traveling regulation process is executed (S19).

In the travel regulation process shown in FIG. 9, the controller 70 confirms the set value of the regulation status i stored in the RAM 73 (S21). Then, when it is determined that the regulation status i is set to 0 (S21: Yes), the controller 70 starts the timer (S22). More specifically, the system clock included in the controller 70 is used to measure the elapsed time from the execution time of step S22 (in other words, the start of travel of the traveling body 10).

Next, the controller 70 increments the current setting value of the regulation status i by 1 (S23). That is, the controller 70 raises the regulation level for the self-propelled screen 1 by one level. Then, the controller 70 executes the regulation for the updated regulation status i (S24).

For example, when the regulation status i is updated from 0 to 1 in step S23, the controller 70 intermittently issues a warning sound through the notification device 74 in step S24. The warning sound is issued as an example of a process of notifying that the overconveyor 40 is changed to the retracted posture or the rotation speed selection lever 62 is switched to the regulated position (low idle state). In addition, instead of issuing a warning sound, the above-mentioned contents may be reproduced as a guide voice. The process of step S24 continues until the set value of the regulation status i is updated.

Next, the controller 70 determines whether or not the maximum value (4 in the present embodiment) is set in the regulation status i stored in the RAM 73 (S25). As shown in FIG. 7, when the regulation status i is set to 4, a control voltage is applied to the cutoff valve 55 to shut off the pilot pressure oil from the pilot pump 53 to the traveling operation lever 63. That is, the traveling body 10 is forcibly stopped by the traveling operation lever 63 contrary to the traveling operation.

Therefore, when the controller 70 determines that the regulation status i is set to 4, that is, when the traveling body 10 is forcibly stopped (S25: Yes), the controller 70 does not execute the processes after step S26 without executing the process. End the driving regulation process. Then, the controller 70 repeatedly executes the determinations of steps S11, S14, S17, and S18 in FIG.

On the other hand, when the controller 70 determines that the regulation status i is set to a value less than 4, that is, when the traveling body 10 is traveling (S25: No), the time measured by the timer (hereinafter, It is determined whether or not the “timer measurement time”) has reached the set time (i + 1) (S27) and whether or not the traveling pilot pressure is equal to or less than the threshold pressure (S28).

More specifically, in step S27, the controller 70 compares the timer measurement time with the set time (i + 1) corresponding to the current regulation status i + 1. For example, when the current regulation status i is 1, the set time (= 30 sec (first time)) corresponding to the regulation status 2 is the target of comparison. On the other hand, since the process of step S28 is common to step S18 of FIG. 8, the description again will be omitted.

Then, the controller 70 executes the processes after step S23 when the timer measurement time reaches the set time (i + 1) (S27: Yes) before the traveling pilot pressure becomes equal to or lower than the threshold pressure (S28: Yes). To do.

For example, when the regulation status i is 1 and the timer measurement time reaches 30 sec (S27: Yes), the controller 70 updates the regulation status i to 2 (S23) and continuously issues a warning sound (S23). S24). Then, since the regulation status i is less than 4 (S25: No), the controller 70 executes the processes after step S27. The set time (i + 1) at this time is 1 min (second time).

Further, when the regulation status i is 2 and the timer measurement time reaches 1 min (S27: Yes), the controller 70 updates the regulation status i to 3 (S23) and forcibly lowers the self-propelled screen 1. Switch to the idle state (S24). As a result, the traveling speed of the self-propelled screen 1 becomes low. Then, since the regulation status i is less than 4 (S25: No), the controller 70 executes the processes after step S27. The set time (i + 1) at this time is 3 min (third time and predetermined time).

Further, when the regulation status i is 3 and the timer measurement time reaches 3 min (S27: Yes), the controller 70 updates the regulation status i to 4 (S23) and applies a control voltage to the cutoff valve 55. (S24). As a result, the traveling body 10 is forcibly stopped regardless of the traveling operation with respect to the traveling operation lever 63. Then, since the regulation status i is 4 (S25: Yes), the controller 70 ends the travel regulation process.

That is, when the operator ignores the regulation by step S24 and continues the traveling operation on the traveling operation lever 63 (S28: Yes), the regulation status increases every time the set time elapses (S27: Yes → S23). Strong regulations will be implemented (S24). Finally, the traveling body 10 is forcibly stopped, and the traveling regulation process is completed (S25: Yes).

In order to release the forced stop of the traveling body 10 (S12, S15), the operator switches the operation selection dial 61 to the working position (S11: Yes), or changes the posture of the overconveyor 40 to the retracted posture (S14). : Yes), the rotation speed selection lever 62 may be switched to the regulated position (S17: Yes). Hereinafter, these processes for releasing the regulation will be referred to as "regulation reset process".

In step S24, which is repeatedly executed, the content of the regulation may be switched. That is, in step S24 when the regulation status i is 3, the controller 70 may stop issuing the warning sound by the notification device 74 and switch the self-propelled screen 1 to the low idle state.

Further, in step S24, which is repeatedly executed, the content of the regulation may be added. That is, in step S24 when the regulation status i is 3, the controller 70 may switch the self-propelled screen 1 to the low idle state while continuously issuing the warning sound by the notification device 74.

On the other hand, in the controller 70, when the traveling pilot pressure is equal to or less than the threshold pressure, that is, when the operator stops the traveling operation lever 63 before the timer measurement time reaches the set time (i + 1) (S27: No) (S28). : No), the timer is paused (S29), and the traveling regulation process is terminated. The controller 70 stores the timer measurement time at the time of step S29 in the RAM 73.

Then, when the operator executes the regulation reset process (S11, S14, S17), the regulation corresponding to the current regulation status i is released (S12, S15). On the other hand, when the operator performs the traveling operation again with respect to the traveling operation lever 63 (S18: Yes), the controller 70 executes the traveling regulation process again (S19).

Then, when the controller 70 determines that the current regulation status i is not 0 (S21: No), the controller 70 restarts the timer paused in step S29 (S26), and executes the processes after step S27. That is, the controller 70 adds the newly measured time to the timer measurement time stored in the RAM 73, and compares it with the set time (i + 1) in step S27.

That is, when the operator notices the regulation in step S24 and performs a stop operation on the traveling operation lever 63 (S28: No), the timer is temporarily stopped and the regulation status i remains at the current value (S29). Then, when the operator executes the regulation reset process (S11, S14, S17), the regulation status i is reset and all the regulations are released (S12, S15). On the other hand, if the operator performs the travel operation again with respect to the travel operation lever 63 without executing the regulation reset process (S18: Yes), the travel regulation process is restarted from the time when the operation is temporarily stopped in step S29.

According to the above embodiment, for example, the following actions and effects are exhibited.

According to the travel regulation process of the above embodiment, a warning sound is first issued intermittently, then the content of the regulation is strengthened with the passage of time, and finally, the traveling body 10 is emitted after a predetermined time has elapsed. It will be forcibly stopped. That is, the operator can be urged to execute the regulation reset process before the traveling body 10 is forcibly stopped.

Then, if the operator who notices the warning sound executes the regulation reset process, the self-propelled screen 1 can be moved in a stable state. On the other hand, the operator may continue the traveling operation as it is if the movement is a short distance while the surrounding safety is ensured. As a result, both the stability and operability of the self-propelled screen 1 during traveling can be achieved.

Further, according to the above embodiment, when the first time (= 30 sec) elapses, the warning sound is switched from the intermittent issuance to the continuous issuance. As a result, the operator can be made aware of the necessity of the regulation reset process, and the operator can be made aware that the execution time of the next regulation (that is, low idle state, stop of the traveling body 10) is approaching. it can. As a result, the operator can appropriately determine whether to continue the traveling operation as it is or to temporarily stop the traveling body 10 to perform the regulation reset process.

The regulation contents of the regulation statuses 1 and 2 are not limited to the example of FIG. As another example, in the regulation status 2, the volume of the warning sound may be increased as compared with the regulation status 1. As yet another example, in the regulation status 2, in addition to issuing the warning sound corresponding to the regulation status 1, the patrol light (registered trademark) may be turned on.

Further, according to the above embodiment, when the second time (1 min) elapses, the self-propelled screen 1 is switched to the low idle state. As a result, it is possible to prevent the self-propelled screen 1 from moving at high speed for a long time in the state where the overconveyor 40 is deployed. On the other hand, since the self-propelled screen 1 can be run at high speed within the second hour, the operability when moving a short distance is improved.

Further, according to the above embodiment, after the third time (3 min) elapses, the traveling body 10 is forcibly stopped, and the traveling body 10 cannot be re-traveled unless the regulation reset process is executed. As a result, it is possible to prevent the self-propelled screen 1 from moving for a long period of time in an unstable state in which the overconveyor 40 is in the deployed posture.

On the other hand, if the operator is explicitly switched to the low idle state (S17: Yes), the self-propelled screen 1 can be run without restriction even when the overconveyor 40 is in the deployed posture (S16). As a result, the operability when the operator runs the self-propelled screen 1 in consideration of safety is improved.

1 Self-propelled screen 10 Traveling body 11 Track 12 Support frame 20 Sieve device 21 Housing 21a Side wall 21b Bottom wall 21c Outlet 22 Wire mesh 23 Rubber spring 24 Hydraulic motor 30 Main conveyor (1st conveyor)
31 Conveyor frame 32 Head pulley 33 Conveyor belt 34 Hydraulic motor 35 Tilt cylinder 40 Over conveyor (second conveyor)
41 Conveyor frame 41a Tip side frame 41b Base end side frame 42 Head pulley 43 Conveyor belt 44 Hydraulic motor 45 1st cylinder 46 2nd cylinder 47, 48, 64 Limit switch 50 Power unit 51 Housing 52 Engine 53 Pilot pump 54 Hydraulic oil tank 55 Cut-off valve 57 Pressure sensor 61 Operation selection dial 62 Rotation speed selection lever 63 Travel operation lever 70 Controller 71 CPU
72 ROM
73 RAM
74 Notification device

Claims (5)

With the running body
A sieve device that sorts the objects to be sorted according to the particle size,
A first conveyor extending from the sieving device in the front-rear direction of the self-propelled screen and discharging objects to be sorted having a particle size smaller than the threshold size sorted by the sieving device.
The posture changes to a deployment posture extending from the sieving device to the outside of the width of the self-propelled screen and a storage posture stored inside the width of the self-propelled screen. A second conveyor that discharges objects to be sorted having a particle size equal to or larger than the threshold size sorted by a sieving device,
A traveling operation unit that receives a traveling operation that instructs the traveling body to travel and a stopping operation that instructs the traveling body to stop.
In a self-propelled screen equipped with a notification device for notifying information,
A conveyor sensor that detects the posture of the second conveyor and
It is equipped with a controller that controls the operation of the self-propelled screen.
The controller
When the traveling operation is performed while the deployed posture is detected by the conveyor sensor, the notification device notifies that the second conveyor will be in the retracted posture.
A self-propelled screen characterized in that the traveling body is stopped when a predetermined time has elapsed from the start of notification. In the self-propelled screen according to claim 1,
The controller is a self-propelled screen characterized by switching from intermittent notification to continuous notification when a first time shorter than the predetermined time elapses from the start of notification. In the self-propelled screen according to claim 2.
An engine that generates a driving force for traveling the traveling body and
An engine operation unit that can be switched to a regulated position that regulates the engine speed to less than the threshold speed and a release position that lifts the regulation of the engine speed.
It is equipped with an operation unit sensor that detects the position of the engine operation unit.
The controller puts the second conveyor in the retracted posture when the traveling operation is performed in a state where the deployed posture is detected by the conveyor sensor and the release position is detected by the operation unit sensor. Alternatively, a self-propelled screen characterized in that the switching of the engine operating unit to the regulated position is notified through the notification device. In the self-propelled screen according to claim 3.
The controller is characterized in that when a second time shorter than the predetermined time and longer than the first time elapses after the start of notification, the rotation of the engine is restricted to less than the threshold speed. Running screen. In the self-propelled screen according to claim 1,
The controller
If the stop operation is performed after the notification is started, the time measurement is temporarily stopped.
A self-propelled type characterized in that when the traveling operation is performed again after the time measurement is temporarily stopped and the deployed posture is detected by the conveyor sensor, the time measurement is restarted. screen.

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