JPH0624900B2 - Control device for a vehicle that also serves as a dump truck - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention is used in the field of a dump truck-carrying vehicle which is a full dump truck and can be moved in the front-rear direction.

(B) Conventional technology When using a conventional vehicle that also serves as a dump truck as a dump truck, use a dump switch to fully dump the platform,
When used as a vehicle carrier, the load switch is used to tilt the loading platform to some extent, and then the slide switch is used to move the loading platform back and forth. You can work while checking the safety while moving.

(C) Problem to be Solved by the Invention By the way, in the above structure, since the dump switch is provided outside the driver's cab, the worker must not go out of the driver's cab even when the dump truck is used as a dump truck, that is, when the cargo bed is fully dumped. Therefore, there is a problem that the workability is remarkably poor as compared with the workability of a general dump truck (the dump operation is performed in the cab).

The present invention has been made to solve the above problems,
The purpose of the present invention is to provide a control device for a vehicle carrier that also serves as a dump truck, so that when the vehicle is used as a dump truck, all work operations can be performed inside the driver's cab, and when used as a vehicle carrier, work operations can be performed outside the driver's cab while confirming safety. It is a thing.

(D) Means for Solving the Problem The present invention is to solve the above-described problems, and a dump frame is provided on a vehicle body, the dump frame can be tilted by a tilting device, and a loading platform is provided on the dump frame. In a vehicle that also serves as a dump truck, in which the loading platform can be moved back and forth by a slide device, a dump work switch device including a dump switch for operating the tilting device is provided in the driver's cab, and the tilting device is operated. A work switch device is provided outside the operator's cab with a slide including a tamper switch for operating the slide device and a slide switch for operating the slide device, and a select switch for selecting only one of the dump work switch device and the slide work switch device is provided. The present invention relates to a control device for a vehicle that also serves as a dump truck.

(E) Operation When used as a dump truck, the select switch is switched to the dump work side, and the dump work switch device is operated in the cab to perform dump work.

When used as a vehicle carrier, the select switch is switched to the slide work side, and the slide work switch device is operated outside the cab to unload the vehicle.

(F) Embodiment An embodiment will be described below with reference to the drawings. (1) is a vehicle body, and a dump frame (2) is mounted on the vehicle body (1). ) Hinged shaft fixed to
Hinge bracket fixed to (3) and dump frame (2)
It is tiltably supported via (4).

A tilting device (6) having a dump cylinder (5) is provided between the vehicle body (1) and the dump frame (2).
The dump frame (2) is tilted at (6).

A loading platform (7) is mounted on the dump frame (2) so as to be movable back and forth, and a slide device (9) having a slide cylinder (8) provided between the dump frame (2) and the loading platform (7). Loading platform
It is designed to move (7) back and forth.

A rear door (10) that also serves as a play plate is provided at the rear of the luggage carrier (7), and a luggage carrier support leg (11) is vertically provided at the rear portion.

(12) is a lock device for fixing the loading platform (7) to the dump frame (2) when used as a dump truck. The lock device (12) is a dump frame as shown in FIGS. 4 and 5. The engaging piece (13) is fixed to (2), the hook (14) engaging with the engaging piece (13) is pivotally supported on the loading platform (7), and the operating lever (15) is attached to the loading platform (7). Is rotatably provided, and the operation lever (15) and the hook (14) are provided via the arms (16), the rods (17), and the shaft (18) supported by the bed (7). The hook (14) for connecting the operation lever (15) to the front of the loading platform (7) is engaged with the engaging piece (13) and the loading platform (7) is locked to the dump frame (2). The lock is released by rotating the cargo bed (7) rearward.

Next, the various detectors will be described with reference to FIGS. 4 and 5. (19) is the first detector, and the first detector (19) is for detecting the locked state of the locking device (12). Yes, engaging piece
Attached to (13) via bracket (20), hook (14)
The restricting plate (21) protruding from the contact makes it "contact" when locked and "disconnected" when unlocked.

(23) (23) is a second detector and a third detector for detecting the tilt angle of the dump frame (2), and both detectors (22) (23)
Is attached to a mounting member (24) fixed to the hinge shaft (3), and is detected by contacting the dump frame (2). In particular, the second detector (22) becomes "contact" at the lower limit angle (about 8 degrees) or more where the bed can slide, and the third detector (23) "breaks" when it exceeds the upper limit angle (about 20 degrees).
It is supposed to be.

(25) is a fourth detector attached to the dump frame (2), and the fourth detector (25) abuts the bracket (26) on the vehicle body (1) side to check the tilt state of the dup frame (2). It is detected, and is designed to be "disconnected" only when the dump frame (2) is not tilted (angle 0 degree).

Explaining the hydraulic circuit in FIG. 6, pressure oil is supplied from the hydraulic pump (27) to the dump cylinder (5) and the slide cylinder (8), and the slide cylinder is operated by operating the first switching valve (28).
(8) expands and contracts, and the dump cylinder (5) expands and contracts by operating the second switching valve (29).

The first switching valve (28) can be switched by solenoids SOLA1 and SOLB1. When the solenoid SOLA1 is energized, the slide cylinder (8) extends and the solenoid SOLB1
The slide cylinder (8) shrinks when the power is turned on.

The second switching valve (29) can also be switched by solenoids SOLA2 and SOLB2. Dump cylinder (5) extends by energizing solenoid SOLA2 and dump cylinder (5) by energizing solenoid SOLB2. Is becoming smaller.

The electric circuit will be described with reference to FIG. 7. A main switch (31) and a select switch (32) are provided on the main circuit (30).

The main switch (31) is provided in the driver's cab (33) and can also be used as an engine switch.

The select switch (32) is provided in the cab (33) so that the dump work circuit (34) and the slide work circuit (35) can be selected.

The dump work circuit (34) includes a first detector (19) and a cab (3
A dump switch (37), which is a switch device (36) for dumping work, is provided inside 3). From the dan switch (37), the raising circuit (38) is the solenoid SOLA2 and the lowering circuit (39) is the fourth. Connected to solenoid SOLB2 via detector (25).

The slide work circuit (35) is provided with a slide work switch device (40) attached to the side of the vehicle body (1),
A dump switch (41) which is one of the switch devices (40)
The auxiliary raising circuit (42) with the third detector (23) interposed is connected to the raising circuit (38).

An auxiliary lowering circuit (43) having the first detector (19) and the second detector (22) provided in parallel is connected to the lowering circuit (39).

The switch device (40) has another slide switch (4
4) is provided and extends from the slide switch (44) to the circuit (45)
Is solenoid SOLA1 and the compression circuit (46) is solenoid SOLB
Connected to 1.

In addition, an alarm circuit (4) in which a second detector (22) is provided in front of the slide switch (44) and a buzzer (47) is provided.
8) is branched.

Although the lock device is manually operated in the embodiment, it can be automatically locked by contacting the regulating member on the dump frame side when the loading platform reaches the most advanced position. Is. The present invention has the above-described structure. Next, the operation will be described. When used as a dump truck, first, the operating lever (15) of the lock device (12) is
Rotate the carriage forward (7) as shown by the one-dot chain line in Fig. 5.
Lock (7) on the dump frame (2).

The above work can be performed after the vehicle is used as a vehicle.

After that, in the cab (33), "connect" the main switch (31)
After that, the select switch (32) is brought into contact with the dump work circuit (34) side, and the dump switch (36) is brought into contact with the lifting circuit (37).

Solenoid SO because the first detector (19) is "contact"
The LA2 is energized, the second switching valve (29) is switched, the dump cylinder (5) is extended, and the platform (7) dumps together with the dump frame (2).

At that time, if the lock device (12) is not in the locked state, the solenoid (SOLA2) is activated because the first detector (19) is "off".
Since electricity is not supplied to the cargo, the cargo bed (7) cannot be dumped.

When lowering the loading platform (7), lower the dump switch (36) to "contact" the circuit (38) to energize the solenoid SOLB2, switch the second switching valve (29), and dump cylinder (5). Shrinks and the platform (7) descends. When the loading platform (7) is in the retracted state, the fourth detector (25) is "off" and the solenoid SOLB2 is de-energized. Next, when using it as a vehicle carrier,
First, in the cab (33), set the select switch (32) to the sliding work circuit (35) side, and then move it out to the side of the vehicle body (1) to operate the lock lever (15) operating lever (15). 5) is rotated to the rear of the loading platform (7) as shown by the solid line in FIG. 5 to release the locking device (12) as shown in FIG.

Then, the slide work switch device (39) and the dump switch (40) are brought into "contact" with the auxiliary raising circuit (41) side.

Since the third detector (23) on the auxiliary raising circuit (41) is in "contact", the solenoid SOLA2 is energized and the second switching valve (2)
9) is switched, the dump cylinder (5) extends, and the platform (7) tilts.

When the loading platform (7) approaches the upper limit angle (about 20 degrees) by operator's eyes, the dump switch (40) is turned off to stop the tilting.

At that time, even if the operator's eyesight is mistaken and the dump switch (40) is set to "contact", when the dump frame (2) reaches the upper limit angle, the third detector (23) is "disconnected". The solenoid SOLA2 is no longer energized and the platform (7) tilting stops automatically.

After stopping tilting, slide the slide switch (43)
Make contact with (44) side.

The solenoid SOLA1 is energized by the "contact" on the extension circuit (44) side, the first switching valve (28) is switched, and the slide cylinder
(8) extends and the platform (7) moves backward on the dump frame (2).

The above operation is for the case where the lower limit angle (about 8 degrees) of the predetermined angle or more is exceeded. If the angle is less than the lower limit angle, the solenoid SOLA1 is energized because the second detector (22) is "off". First, the rearward movement of the loading platform (7) can be restricted.

As a result, it is possible to avoid a state in which the support legs (11) are not grounded when the load platform (7) is at the rearmost position.

After the loading platform (7) has moved to the rearmost side, as shown in Fig. 2, the door (10)
Open and load the vehicle onto the carrier (7).

It should be noted that when the platform (7) is above the lower limit angle, the warning circuit (47) is also energized and the buzzer (46) is activated, informing the surroundings that the unloading work of the vehicle is about to begin and calling attention. .

When the loading and unloading of the vehicle is completed, the door (10) is closed from the state shown in FIG. 2, the slide switch (43) is contracted to the circuit (45) side, and the solenoid SOLB1 is energized. Solenoid SOLB1
The first switching valve (28) is switched by energizing, and the slide cylinder (8) is contracted to move the loading platform (7) forward.

After the loading platform (7) has moved to the frontmost position (two-dot chain line in FIG. 2), the operating lever (15) of the lock device (12) is rotated forward of the loading platform (7) to move the loading platform (7) to the dump frame (2). ) And the first detector (19) is brought into contact.

In this state, when the dump switch (40) is set to "contact" by the auxiliary lowering circuit (42), the solenoid SOLB2 is energized to reduce the dump cylinder (5) and lower the load platform (7) to the state shown in Fig. 1. Let

At that time, if the angle of the platform (7) becomes less than the lower limit angle, the second detector (22) will be "off", but the first detector (19) will be "contact", so the solenoid SOLB2 It is designed to be able to maintain the energized state.

(G) Effect of the Invention As described above, according to the present invention, the dump work switch device is provided inside the driver's cab, and the slide work switch device is provided outside the driver's cab.
Since a select switch that can select only one of the switch devices is provided, it can be operated in the same way as a dump truck from the cab during dumping work, and the loading platform can be moved back and forth from outside the cab during vehicle unloading work. The operation can be performed while confirming the safety of the surroundings, and the work position corresponding to the work mode can be secured. Further, since only one of the switch devices can be used by the select switch, even if the other switch device is operated by mistake while using the one switch device, the switch does not operate and the work safety can be secured.

[Brief description of drawings]

FIG. 1 is an overall view of a vehicle that also serves as a dump truck, FIGS. 2 and 3 are operation state diagrams, FIG. 4 is a partially enlarged view, and FIG.
6A and 6B are hydraulic circuit diagrams and FIG. 7 is an electric circuit diagram. (1) is the vehicle body, (2) is a dump frame, (7) is a loading platform, (12) is a locking device, (32) is a select switch, (33) is a cab,
(36) is a switch device for dump work, (37) is a switch switch, (40) is a switch device for slide work, (41) is a dump switch, and (44) is a slide switch.

Claims (1)

[Claims] 1. A dump truck provided with a dump frame on a vehicle body, wherein the dump frame can be tilted by a tilting device, a loading platform is provided on the dump frame, and the loading platform can be moved back and forth by a slide device. In a dual-purpose vehicle transport vehicle, a dump work switch device including a dump switch for operating the tilting device is provided in a driver's cab, and a slide work switch including a dump switch for operating the tilting device and a slide switch for operating a slide device. A control device for a vehicle for a vehicle that also serves as a dump truck, wherein the device is provided outside a driver's cab, and a select switch for selecting only one of the dump work switch device and the slide work switch device is provided.