JP2678406B2 - Dump type powder carrier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dump type powder and granular material carrier. More specifically, the present invention relates to a dump-type granular material carrier capable of discharging the granular material contained in a tank by its own weight and compressed air.

[0002]

2. Description of the Related Art Conventionally, as a dump-type granular material carrier, a discharge port for discharging the granular material to the outside of the tank is provided at the rear of the tank for storing the granular material mounted on the vehicle body. By lifting the front side with the lifting device, the self-weight discharge function that discharges the powder and granules stored in the tank through the discharge port, and the compressed air is supplied into the tank. There is provided one having an air discharging function for discharging the powder through a powder discharging pipe communicating with the outlet.

In this type of powder and granular material carrier, a lid which is opened / closed by a hydraulic cylinder is provided at the discharge port. When the weight is discharged, the lid is opened and when the air is discharged. In this case, the powder particles are discharged to the outside of the tank with the lid closed. Further, a vent valve that can be opened and closed is provided at a predetermined position on the front side of the tank. This valve is opened to prevent a negative pressure in the tank when discharging by its own weight, and is closed so that the inside of the tank can be pressurized when discharging air. Further, the lid body is locked by a locking device so as not to be opened by external pressure when the discharge port is closed.

[0004]

In order to perform self-weight discharge in the powder and granular material carrier having the above-mentioned structure, it is necessary to open the lid before lifting the tank. This is because if the lid is opened with the tank being lifted, the lid collides with the ground and is damaged. Further, it is necessary to open the ventilation valve in order to prevent the tank from being dented due to the negative pressure in the tank due to the discharge of the powdery particles in the tank by its own weight. However, since the above-mentioned transport vehicle can independently perform the raising / lowering operation of the tank, the opening / closing operation of the lid, the opening / closing operation of the valve for ventilation, and the locking / unlocking operation of the lid by the locking device, respectively. It is also possible to open the lid after lifting the tank, and this operation error causes a problem that the lid collides with the ground and is damaged. In addition, the vent valve may be closed to discharge the fluid by its own weight, which causes a negative pressure in the tank and causes a depression in the tank. Further, when the lid is opened, it is necessary to unlock the lid by the lock device in advance. However, forgetting the lock release and performing the lid opening operation, the lock device and the lid are opened. There was a problem of causing damage.

The present invention has been made in view of the above problems, and provides a dump-type powdery-particle carrier capable of preventing the lid, the tank, the locking device and the like from being damaged by an operation error. With the goal.

[0006]

A dumb-type powdery-particle carrier of the present invention for achieving the above object is provided with a tank for storing powdery-particles mounted on a vehicle body and a rear part of the tank, Discharge port for discharging powder and granules to the outside of the tank, lid that opens and closes the discharge port, lock device that locks the lid while the discharge port is closed, and discharge of powder and granules in communication with the discharge port Equipped with a pipe, an openable and closable ventilation valve that communicates with the front part of the tank, and an elevating device that lifts the front side of the tank and tilts the tank at a predetermined angle. A dump type that selectively discharges the powder and granules discharged by its own weight through the discharge port and the air discharged through the powder and granule discharge pipe by the air pressure of the compressed air sent into the tank. For powder carrier Te, locking lid and the lid closing detecting means for detecting the open or closed state of the lid, and the valve opening detection means for detecting the open or closed state of the valve for ventilation, by a locking device
And a lid lock detection means for detecting whether it is, data
Below the tank to detect whether the tank is descending to its home position
A descending detection means, at the time of its own weight discharge detects that the lid closing detection means is opened lid, with the valve opening detection means detects that the valve is open, the lifting device according to the tank Lifting is allowed and the lid
The lock detection device is locked by the locking device.
Is detected, or the tank descent detection means is
While detecting that the link has not descended to the fixed position,
And a control means for restricting the opening and closing of the lid .

[0007]

According to the dump type granular material carrier having the above structure,
When discharging by its own weight, the lid is opened and the ventilation bar is
With the lube open, the control means
Since it is possible to lift the tank by
Open the lid or close the ventilation valve.
In addition, there is no risk of self-weight discharge.

Further, the control means is for detecting a lid lock.
Means that the lid is locked by the locking device.
When the tank is detected or the tank descent detection means
Open the lid while detecting that the lid is not lowered.
Regulate closing.

Therefore, the opening operation of the lid is performed,
It is possible to prevent the lid body from being opened when the tank is not lowered to the fixed position.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 2 is a side view of the dump-type powder-particle carrier of the present invention. This powder-and-granule carrier has a vehicle body 1 on which a tank 2 for storing powders and granules is mounted. A discharge port 3 and a lid 4 that closes the discharge port 3 in an openable manner are provided, and a powder discharge pipe 6 is introduced into the discharge port 3 through the lid 4. In addition, the lid 4
Is provided with a lock means 7 for restricting the opening of the lid body 4 with the discharge port 3 closed (see FIG. 3). Further, in front of the tank 2, the tank 2
An elevating device 5 is provided for lifting the rear end of the tank 2 as a fulcrum, and a butterfly valve 8 that can be opened and closed is provided at the front of the tank 2 so that the front of the tank communicates with the outside of the tank. A storage port 21 for storing the powder or granular material in the tank 2 is provided in the upper portion of the tank 2.

As shown in FIG. 3, the lid 4 is rotatably attached to the tank 2 side via a hinge 41. The lid 4 has a rear end on the tank 2 and a rod 4
2a is opened and closed by a hydraulic cylinder 42 rotatably connected to the hinge 41. Further, the discharge port 3 is provided with a limit switch LS1 for detecting that the lid 4 is closed and a limit switch LS2 for detecting that the lid 4 is opened. These two limit switches L
S1 and LS2 constitute a lid opening / closing detection means, and are pressed with opening / closing of the lid 4.

The lock device 7 is provided at a plurality of positions along the peripheral portion of the lid body 4 and is provided with a lock arm 72 which is rotatably operated by a hydraulic cylinder 71 rotatably fixed to the lid body 4. By rotating the lock arm 72 in the clockwise direction in FIG. 3 with the lid body 4 closed, the lock arm 72 is engaged with the flange portion 31 provided on the peripheral portion of the discharge port 3 and the lid body 4 is closed. Lock body 4 to prevent it from opening. The lock device 7 includes a limit switch LS3 for detecting that the lid 4 is locked, and a lid 4
Is provided with a limit switch LS4 for detecting that the is in an unlocked state. These two limit switches LS3, LS4 compose a lid lock detecting means, and are pressed with the rotation of the lock arm 72.

The butterfly valve 8 for ventilation is shown in FIG.
As shown in FIG. 6, the opening / closing operation is performed by rotating the operation lever 81, and the open / closed state is detected by a limit switch LS5 as a valve opening / closing detection means. The limit switch LS5 is pressed by a dog 82 that rotates integrally with the operation lever 81 when the butterfly valve 8 is opened.

The lifting device 5 comprises a multistage hydraulic cylinder 51.
It is constituted by. The lifting device 5 is provided with a limit switch LS6 as a tank tilt detecting means for detecting whether or not the tank 2 is tilted by a predetermined angle. The limit switch LS6 is pressed by the dog 52 that rotates clockwise in FIG. 5 together with the hydraulic cylinder 51 in conjunction with the lifting operation of the tank 2.

In order to detect whether or not the tank 2 is descending to a fixed position, that is, whether or not it is located at the descending end, in a portion corresponding to the lower surface of the front end portion of the tank 2 of the vehicle body 1. A limit switch LS7 is provided as the tank descent detection means (see FIG. 1). The limit switch LS7 is pressed when the tank 2 descends to a fixed position. Further, the lid 4 is provided with a pressure switch 9 which is activated when the pressure in the tank 2 exceeds a predetermined pressure (for example, 0.06 Kgf / cm ² ) (see FIG. 3).

FIG. 1 shows a control circuit, which includes a main switch S and a power supply circuit A0 having a pilot lamp PL1 which is turned on when the main switch S is turned on.
On the other hand, a circuit A1 for raising the tank 2, a circuit B1 for lowering the tank 2, a circuit A2 for locking the lid 4, and a circuit B for unlocking the lid 4.
2, a circuit A3 for opening the lid 4, a circuit B3 for closing the lid, and a circuit A4 for notifying that the tank 2 is lifted from the lower end are connected in parallel.

Circuit A1 for raising the tank 2
Is a normally open contact of the operation button PB1, a normally open contact of the limit switches LS1 and LS3, and a limit switch LS5.
Normally closed contact of LS6 and hydraulic cylinder 5 of lifting device 5
1, a circuit in which solenoids SOL1 for operating the hydraulic control valve to extend 1 are connected in series, respectively, and the limit switches LS1, LS3, LS5 in parallel,
It is composed of a circuit in which a limit switch LS2 and a normally open contact of the limit switch LS5 are connected in series. The circuit B1 for lowering the tank 2 includes a normally open contact of the operation switch PB2 and a solenoid SOL for operating a hydraulic control valve to contract the cylinder 51.
It is composed of a circuit in which 2 and 2 are connected in series. Further, the circuit A2 for locking the lid 4 connects the normally open contact of the operation switch PB3 and the solenoid SOL3 of the hydraulic control valve for operating the cylinder 71 of the lock device 7 to lock the lid 4 in series. It consists of a circuit. The circuit B2 for unlocking the lid 4 includes a normally closed contact of the pressure switch 9, a normally open contact of the operation switch PB4, and the hydraulic cylinder 71 for unlocking the lid 4.
It is composed of a circuit in which a solenoid SOL4 of a hydraulic control valve for operating the is connected in series. The circuit A3 for opening the lid includes limit switches LS7, LS.
4 and a normally-open contact of the operation switch PB5 and a solenoid SOL5 of a hydraulic control valve that operates the cylinder 42 to open the lid 4 are connected in series. The circuit B3 for closing the lid 4 is provided in parallel with the operation switch PB5 and the solenoid SOL5.
It is composed of a circuit in which a normally open contact of the operation switch PB6 and a solenoid SOL6 of a hydraulic control valve for operating the cylinder 42 to close the lid 4 are connected in series. The circuit A4 for notifying the rise of the tank 2 is composed of a circuit in which the pilot lamp 2 and the buzzer B are connected to the normally closed contact of the limit switch LS7.

With the powdery or granular material carrier having the above structure, the following control can be performed. (1) To lift the tank 2, the limit switch LS1 is closed (that is, the lid 4 is closed) and the limit switch LS3 is closed (that is, the lid 4 is locked) while the operation switch PB1 is pressed. ) And the limit switch LS5 is closed (that is, the butterfly valve 8 is closed). Therefore, the air discharge for discharging the powder or granular material in the tank 2 by the air pressure can be performed with the tank 2 being lifted and tilted at a predetermined angle. Moreover, in this case, it is possible to prevent the granular material in the tank 2 from leaking out of the tank through the discharge port 3 and the butterfly valve 8 due to forgetting to close the lid 4 and the butterfly valve 8. (2) While the operation switch PB1 is being pressed, the limit switch LS2 is closed (that is, the lid 4 is opened),
With the limit switch LS5 pressed (that is, with the butterfly valve 8 open), the tank 4
Allow rise. Therefore, in the case of self-weight discharge, the tank 2 is lifted with the lid 4 closed, and the lid 4 is opened in this lifted state, so that the lid 4 collides with the ground. It is possible to prevent damage. Further, it is possible to prevent the inconvenience of damaging the tank 2 due to the negative pressure in the tank 2 by discharging the powdery particles by gravity while the butterfly valve 8 is closed by mistake. (3) Limit switch LS1 and limit switch LS
When both of the two are in the open state, that is, when the lid body 4 is at an intermediate position where the lid body 4 is not completely opened, the rise of the tank 2 is restricted to prevent the lid body 4 from colliding with the ground. be able to. (4) When the limit switch LS1 is closed (that is, the lid 4 is closed) and the limit switch LS5 is pressed (that is, the butterfly valve 8 is opened),
Lifting of the tank 2 can be regulated. Therefore, the tank 2
It is possible to prevent a situation in which the inside of the tank 2 cannot be pressurized by the compressed air while lifting the. (5) The lid 4 cannot be opened unless the limit switch LS4 is closed, that is, unless the lid 4 is unlocked. Therefore, it is possible to prevent the lid 4 and the lock device 7 from being damaged due to forgetting the operation of unlocking the lid 4. (6) As long as the limit switch LS7 is not pressed, that is, unless the tank 2 is lowered to the fixed position,
The lid 4 cannot be closed. Therefore, the tank 2
It is possible to prevent the lid body 4 from being damaged by coming into contact with the ground by accidentally closing the lid body 4 in a state of being lifted. (7) Limit switch 6 as tank tilt detection means
When the tank is opened, the rise of the tank 4 is stopped. Therefore, it is possible to reliably stop the tank 4 at a predetermined inclination angle, and it is possible to prevent the transport vehicle from falling due to excessive lifting of the tank 4. (8) When the pressure switch 9 is opened, that is, the tank 4
When the internal pressure rises above a predetermined pressure, unlocking of the lid 4 is restricted. Therefore, it is possible to prevent the lid 4 from being forcibly opened and damaged by unlocking the lid 4 by mistake while the inside of the tank 4 is pressurized.

The powdery or granular material carrier of the present invention is not limited to the above-mentioned embodiment, and various detecting means are constituted by proximity switches, photoelectric switches or the like instead of the above limit switches. It is possible to make various design changes such as

[0020]

As described above, according to the dump type granular material carrier of the present invention, since the tank can be lifted while the lid and the ventilation valve are open,
There is no possibility of an operation error of accidentally opening the lid after raising the tank when discharging by its own weight, and it is possible to prevent the lid from being damaged due to the operation error. In addition, there is no risk of forgetting to open the ventilation valve to discharge the powder or granular material by its own weight, and it is possible to prevent the tank from being damaged due to negative pressure in the tank due to forgetting to open the valve.

Further , since the lid cannot be opened / closed while the lid is locked, it is possible to prevent the locking device and the lid from being damaged by opening the lid without forgetting to release the lock. In addition, the lid can be opened and closed only when the tank is descending to a fixed position, so opening and closing the lid with the tank raised will damage the lid by colliding with the ground. Can be prevented.

[Brief description of the drawings]

FIG. 1 is an electric circuit diagram showing an embodiment of a dump-type powdery-particle carrier of the present invention.

FIG. 2 is a side view of a powder and granular material carrier.

FIG. 3 is an enlarged view of the vicinity of a discharge port.

FIG. 4 is an enlarged view of a ventilation valve.

FIG. 5 is a side view showing a main part of the lifting device.

[Explanation of symbols]

1 Car Body 2 Tank 3 Discharge Port 4 Lid 5 Lifting Device 6 Powder Discharge Pipe 7 Lock Device 8 Ventilation Butterfly Valves LS1, LS2 Limit Switch as Lid Detection Unit LS3, LS4 Limit as Lid Lock Detection Means Switch LS5 Limit switch as valve open / close detection means LS7 Limit switch as tank descent detection means

Claims (1)

(57) [Claims] 1. A tank for storing powder and granules mounted on a vehicle body, a discharge port provided at a rear portion of the tank for discharging powder and granules to the outside of the tank, and a lid for opening and closing the discharge port. A lock device that locks the lid with the discharge port closed, a powder discharge pipe that communicates with the discharge port, an openable and closable ventilation valve that communicates with the front part of the tank, and the front side of the tank. And a tilting device for inclining the tank by a predetermined angle, and in a state in which the tank is tilted, the powder and granules stored in the tank are discharged by their own weight through the discharge port, and are sent into the tank. In a dump type granular material carrier that selectively discharges air through the granular material discharge pipe by the compressed air pressure, a lid opening / closing detection means for detecting the open / closed state of the lid, and a ventilation Check the open / closed state of the valve A valve opening detection means for sensing whether lid is locked by a locking device
Lid lock detection means and a tank for detecting whether the tank is descending to a fixed position
When the lid opening / closing detecting means detects that the lid is opened and the valve opening / closing detecting means detects that the valve is opened , the lowering detection means and the lid opening / closing detection means detect the opening of the tank by the lifting device. Lifting is allowed and the lid lock detection means
The lock device detects that the lid is locked.
Or the tank descent detection means
When it is detected that the lid is not descending, it is
A dump-type granular material carrier, comprising: a control means for controlling .