JPH02158430A - Controller for dump-cum-vehicle truck - Google Patents

Abstract

PURPOSE:To make safety operation securable by installing a dumping work switching device in a driver's cab and a sliding work switching device out of the driver's cab, respectively, and making them selectable in an alternative way, in a truck capable of fully dumping the rear body as well as making itself shiftable in the longitudinal direction. CONSTITUTION:A tilting device is installed in space between a car body 1 and a dump frame 2, and this dump frame 2 is tilted to some extent as specified by operation of this tilting device. In addition, a rear body 7 is mounted on the dump frame 2 in a longitudinally shiftable manner, and this rear body 7 is moved before and behind by operation of a sliding device 9. In this case, a main switch 31 and a select switch 32 being situated in a driver's cab 33 are installed on a main circuit 30 of an electric circuit, and a dumping work circuit 34 and a sliding work circuit 35 are made selectable by this select switch 32. Then, a dumping work switching device 36 being set up in the driver's cab 33 is installed in this dumping work circuit 34, while a sliding work switching device 40 being set up at the side of the car body 1 is installed in the sliding work circuit 35.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Field of Application The present invention is utilized in the field of a dump vehicle/vehicle transport vehicle that is capable of fully dumping a cargo platform and also capable of moving forward and backward.

(b) Conventional technology When using a conventional dump vehicle/vehicle carrier as a dump truck, the dump switch fully dumps the loading platform.
When used as a vehicle carrier, a dump switch is used to tilt the loading platform slightly, and a slide switch is used to move the loading platform back and forth. This allows you to work while checking safety while moving.

(G) Problem to be Solved by the Invention By the way, in the above structure, the dump switch is provided outside the driver's cab, so the operator has to go out of the driver's cab even when using it as a dump truck, that is, when fully dumping the loading platform. In addition, the workability of general dump trucks (
There is a problem in that the work efficiency is significantly worse than that in which the dump truck is operated inside the driver's cabin.

The present invention was made to solve the above-mentioned problems.
The purpose is to provide a control device for a vehicle transport vehicle that also serves as a dump truck, which allows all work operations to be performed inside the driver's cab when used as a dump truck, and allows work operations to be performed while confirming safety outside the driver's cab when used as a vehicle transport vehicle. It is something.

(d) Means for Solving the Problems The present invention solves the above-mentioned problems. A dump frame is provided on the vehicle body, the dump frame is made tiltable by a tilting device, and a loading platform is mounted on the dump frame. established,
In the dumping/vehicle transport vehicle in which the loading platform can be moved back and forth by a slide device, a dumping operation switch device comprising a dump switch for activating the tilting device is provided in the driver's cab, and a dump switch for activating the tilting device. and a slide switch for actuating the slide device, the switch device for slide work is provided outside the driver's cab, and a select switch is provided for selecting only one of the switch device for dump work and the switch device for slide work. This invention relates to a control device for a transport vehicle.

(e) Operation When using the vehicle as a dump truck, switch the select switch to the dumping operation side and operate the dumping operation switch device in the driver's cab to perform the dumping operation.

When used as a vehicle transport vehicle, the select switch is switched to the sliding operation side, and the sliding operation switch device is operated outside the driver's cab to load and unload the vehicle.

(f) Example The following example will be explained with reference to the drawings. (1) is a vehicle body, a dump frame (2) is mounted on the vehicle body (1), and the dump frame (2) is mounted on the vehicle body (1). ) and a hinge bracket (4) fixed to the dump frame (2).

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 by this tilting device (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) The loading platform (7) can be moved back and forth.

Behind the loading platform (7) is a sliding door (10) for the front of the ayumi board.
is provided, and support legs (11) for the loading platform are provided vertically at the rear.

(12) is a locking device for fixing the loading platform (7) to the dump frame (2) when used as a dump truck;
As shown in FIGS. 4 and 5, the locking device (12) has an engaging piece (13) fixed to the dump frame (2), and a hook (14) that engages with the engaging piece (13). The loading platform (7
), and on the other hand, an operating lever (15) is rotatably provided on the loading platform (7), and this operating lever (15) and the hook (
14) and each arm (16)..., each rod (17)
... and the loading platform (7) are connected via a shaft (18) supported by the loading platform (7), and the operating lever (15) is connected to the loading platform (7).
7) When rotated forward, the hook (14) will engage the engagement piece (13).
), the loading platform (7) is locked to the dump frame (2), and when the loading platform (7) is rotated rearward, the lock is released.

Next, various detectors will be explained with reference to FIGS. 4 and 5. (19) is a first detector, and the first detector (19) detects the locked state of the locking device (12). It is attached to the engaging piece (13) via the bracket (20), and the regulating plate (21) protrudes from the hook (14) so that it is "connected" when locked and "disconnected" when unlocked. ing.

(22) and (23) are a second detector and a third detector for detecting the tilt angle of the dump frame (2), and both detectors (22) and (23) are fixed to the hinge shaft (3). The dump frame (2) is attached to a mounting member (24), and the dump frame (2) is detected by coming into contact with the dump frame (2).

In particular, the second detector (22) becomes "contact" when the loading platform slides at a lower limit angle (approximately 8 degrees) or more, and the third detector (23) becomes "off" when the upper limit angle (approximately 20 degrees) is exceeded. It looks like this.

(25) is a fourth detector attached to the dump frame (2), and the fourth detector (25) is in contact with the bracket (26) on the vehicle body (1) side to indicate the tilting state of the dump frame (2). It is designed to be "off" only when the dump frame (2) is not tilted (angle 0 degrees).

To explain the hydraulic circuit using Fig. 6, the hydraulic pump (27)
From dump cylinder (5) and slide cylinder (8)
Pressure oil is supplied to the cylinder, the slide cylinder (8) expands and contracts by operating the first switching valve (28), and the dump cylinder (5) expands and contracts by operating the second switching valve (29). There is.

In addition, the first switching valve (28) has solenoids 5QLAI, 5
It is designed to be switched by OLBI, and when the solenoid 5QLAI is energized, the slide cylinder (8) is extended, and when the solenoid 5QLB1 is energized, the slide cylinder (8) is contracted.

The second switching valve (29) can also be switched by solenoid S leaf ^2 and S leaf 82, and solenoid 5OLA
When the solenoid 5OLB2 is energized, the dump cylinder (5) is expanded, and when the solenoid 5OLB2 is energized, the dump cylinder (5) is contracted.

The electric circuit will be explained with reference to FIG. 7. A main switch (31) and a select switch (32) are provided on a 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 driver's cab (33) and is capable of selecting between the dump work circuit (34) and the slide work circuit (35).

The dump work circuit (34) is provided with a first detector (19) and a dump switch (37) which is a switch device (36) for dump work installed in the driver's cab (33). ) - The whisker circuit (38) is connected to the solenoid 5OLA2, and the lowering circuit (39) is connected to the solenoid 5OLB2 via the fourth 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), and from a dump switch (41), which is one of the switch devices (40), An auxiliary raising circuit (42) with a third detector (23) interposed therebetween is connected to the raising circuit (38).

Further, an auxiliary lowering circuit (43) in which a first detector (19) and a second detector (22) are provided in parallel is connected to the lowering circuit (39).

The switch device (40) is provided with another slide switch (44), and the extension circuit (45) from the slide switch (44) is connected to the solenoid 5QLAI, and the retraction circuit (46) is connected to the solenoid 5OLB1.

Also, before the slide switch (44) is a second detector (
22) and an alarm circuit (48) provided with a buzzer (47) is branched off.

In the embodiment, the locking device is operated manually, but it may also be configured so that when the loading platform reaches the forwardmost position, it comes into contact with a regulating member on the dump frame side and automatically enters the locked state. It is possible.

The present invention has the above-mentioned structure, and its operation will now be explained. When used as a dump truck, first move the operating lever (15) of the locking device (12) to the front of the loading platform (7) as indicated by the dotted chain line in Figure 5. to lock the loading platform (7) to the dump frame (2).

Incidentally, the above-mentioned work can also be carried out after the use of the vehicle as a transport vehicle is completed.

Afterwards, press the main switch (31) inside the driver's cab (33).
After setting the select switch (32) to the dump work circuit (34) side, turn the dump switch (36)
) is raised and connected to the circuit (37).

Since the first detector (19) is "closed", the solenoid 5OLA2 is energized, the second switching valve (29) is switched off, the dump cylinder (5) is extended, and the loading platform (7) is moved to the dump frame ( 2) and dump it together.

At that time, if the locking device (12) is not in the locked state, the first detector (19) is "off" and the solenoid 5OLA2 is not energized, making it impossible to dump the loading platform (7). It looks like □.

When lowering the loading platform (7), press the dump switch (36).
) is lowered and connected to the circuit (38), the solenoid SO
[82 is energized, the second switching valve (29) is switched, the dump cylinder (5) is contracted, and the loading platform (7) is lowered.

When the loading platform (7) is in the retracted state, the fourth detector (25) indicates "
"off" and the current to the solenoid 5OLB2 is cut off.

Next, when using it as a vehicle carrier, first
33), set the select switch (32) to the slide working circuit (35) side, go out to the side of the vehicle body (1), and turn the operating lever (15) of the locking device (12) to the fifth position. As shown in the solid line in the figure, rotate the loading platform (7) rearward and lock the locking device (1).
2) is released as shown in Figure 4.

Thereafter, the dump switch (40) of the slide operation switch device (39) is connected to the auxiliary lifting circuit (41).

The third detector (23) on the auxiliary raising circuit (41)
Since the solenoid S is connected, the solenoid S valve 2 is energized, the second switching valve (29) is switched, the dump cylinder (5) is extended, and the loading platform (7) is tilted.

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

At that time, the worker's visual estimation was incorrect and the dump switch (40
) is set to 1, the dump frame (2)
When reaches the upper limit angle, the third detector (23) becomes "off", the solenoid 5OLA2 is no longer energized, and the loading platform (
7) The tilting movement is automatically stopped.

After stopping the tilting, the slide switch (43) is turned to the extension circuit (44) side.

The solenoid 5O is connected by the "connection" on the extension circuit (44) side.
The LAI is energized, the first switching valve (28) is switched, the slide cylinder (8) is extended, and the loading platform (7) moves backward on the dump frame (2).

Note that the operation 1- is performed when the lower limit angle (about 8 degrees) or more of the predetermined angle is exceeded, and when the lower limit angle is below the second detector (22
) is set to "off", so the solenoid 5OLAI is not energized and the backward movement of the loading platform (7) can be restricted.

This makes it possible to avoid a situation in which the support legs (11) do not touch the ground when the loading platform (7) is at the rearmost position.

After the loading platform (7) moves to the rearmost position, open the sliding door (as shown in Figure 2).
10) and load the vehicle onto the loading platform (7).

In addition, if the loading platform (7) reaches the lower limit angle or more, the alarm circuit (47)
) will also be energized and a buzzer (46) will sound, alerting those around you that loading and unloading of vehicles is about to begin.

When the loading and unloading of the vehicle is completed, the fan door (10) is closed from the state shown in FIG. 2, and the slide switch (43) is connected to the retraction circuit (45) to energize the solenoid 5OLBI.

The first switching valve (28) is activated by energizing solenoid 5OLB1.
is switched, the slide cylinder (8) contracts and the loading platform (
7) Move forward.

After the loading platform (7) has moved to the frontmost position (dashed line in Figure 2), rotate the operating lever (15) of the locking device (12) forward of the loading platform (7) to move the loading platform (7) to the dump frame (2). is locked and the first detector (19) is brought into contact.

In this state, switch the dump switch (40) to the auxiliary lowering circuit (4
2) When set to "contact", the solenoid 5OLB2 is energized to contract the dump cylinder (5) and lower the loading platform (7) to the state shown in FIG.

At that time, if the angle of the loading platform (7) becomes below the lower limit angle, the second
The detector (22) becomes "off", but the first detector (19)
Since it is "connected", it is possible to maintain the energized state to the solenoid 5OLB2.

(Ca) Effects of the Invention As described above, the present invention provides a switch device for dump work inside the driver's cab, a switch device for slide work outside the driver's cab,
Since a pull select switch is provided to select only one of the above-mentioned switch devices, it can be operated from the driver's cab during dumping operations in the same way as a dump truck, and when loading and unloading a vehicle, the loading platform can be moved back and forth from outside the driver's cab. It is possible to operate while checking the safety of the surrounding area, and it is possible to secure a working position that corresponds to the work mode.

Further, since only one of the switch devices can be used with the select switch, even if one switch device is operated by mistake while the other switch device is in use, it will not operate, thereby ensuring work safety.

[Brief explanation of the drawing]

Figure 1 is an overall view of the dump/vehicle carrier, Figures 2 and 3 are operating state diagrams, Figure 4 is a partially enlarged view, and Figure 5 is the
Figures AA and 6 are hydraulic circuit diagrams, and Figure 7 is an electrical circuit diagram. (1) is the vehicle body, (2) is the dump frame, (7) is the loading platform, (12) is the lock device, (32) is the select switch, (33) is the driver's cab, (36) is the switch device for dump work, (37) is a dump switch, (40) is a slide work switch device, (41) is a dump switch, (4
4) is a slide switch. Applicant: Kyokuto Kaihatsu Kogyo Co., Ltd.

Claims (1)

[Claims] In a vehicle carrier that also serves as a dump, a dump frame is provided on a vehicle body, the dump frame is tiltable with a tilting device, a loading platform is provided on the dump frame, and the loading platform can be moved forward and backward with a sliding device. , a switch device for dump work consisting of a dump switch for operating the tilting device is provided in the driver's cab, and a switch device for sliding work consisting of a dump switch for operating the tilting device and a slide switch for operating the slide device is provided outside the driver's cab. A control device for a vehicle carrier that also serves as a dumper, comprising a select switch that can select only one of the switch device for dump work and the switch device for slide work.