JPH07115833B2 - Vehicle control mechanism equipped with a crane mechanism - Google Patents

Description

The present invention relates to a vehicle equipped with a crane mechanism, and more particularly, to a vehicle equipped with a crane mechanism.
The present invention relates to an outrigger mechanism for fixing a vehicle body to the ground and a vehicle control mechanism equipped with a crane mechanism capable of simultaneously starting a crane mechanism.

[Prior Art] Conventionally, a vehicle, particularly a vehicle for carrying a heavy load such as a truck, often has a crane mechanism installed on its vehicle body. In a vehicle equipped with this crane mechanism, when loading or unloading heavy objects, the crane mechanism fixed to the vehicle body can hang the load to perform loading or unloading work. It is a thing.

Conventionally, a plurality of workers have been required for the work of loading and unloading heavy objects on a bed. For this work, in addition to the driver, an assistant had to be put on the vehicle and engaged. Due to the high labor cost in recent years, it has become difficult to hire an assistant only for cargo handling. In order to solve this labor-saving problem, vehicles with a crane mechanism have been developed.

In a vehicle equipped with this crane mechanism, the driver can independently carry out cargo handling work by operating the crane mechanism. Therefore, the driver does not have to lift the heavy object directly and does not give a physical burden, so that the labor of the cargo handling work can be saved. Since it is possible to load heavy objects just by operating the hydraulic lever of this crane mechanism,
The physical burden on the workers was greatly reduced, which was epoch-making. For these reasons, the number of vehicles equipped with a crane mechanism on the vehicle body is increasing.

[Problems to be Solved by the Invention]

As described above, vehicles in which the crane mechanism is fixed to the vehicle body have been increasing, but such vehicles are not usually used for traveling a long distance. Most of them are used for the work of moving to a plurality of points in a short distance and loading or unloading heavy objects at the point of collection.

This is because the purpose of using a vehicle equipped with a crane mechanism was to move in a limited specific area and to stop and load cargo at multiple locations per day. Therefore,
A vehicle with a crane mechanism will have to operate the crane mechanism many times a day.

In the case of a vehicle equipped with this crane mechanism, loading and unloading heavy objects by operating the crane mechanism reduces the burden on workers, but at each loading and unloading site Will be forced to do the preparation work. In other words, there is preparation that must be prepared in advance before operating the crane mechanism.

First, the outrigger mechanism must be operated so that the outrigger is extended and lowered, and the vehicle body is fixed by floating it from the ground. This work is to prevent the vehicle from tipping over due to changes in load. Next, the hook of the crane mechanism is hooked and fixed to the wire stretched over the loading platform etc., but this hook must be removed from the wire. This is because the hook is hanging with a wire for lifting, and it is dangerous to shake when moving the vehicle, so the hook is fixed to the wire of the cargo bed.

Therefore, two-step preparation work is required before operating the crane mechanism. This work involves fixing the vehicle body with an outrigger.

Release the hook fixed to the wire.

Is.

If these two operations are not completed in sequence, the operation of the target crane mechanism cannot be started. This work had to be carried out at each of the cargo collection points where the vehicle was stopped, and the cargo handling work was not carried out promptly and was troublesome for the workers.

When the vehicle is moved to the next destination after the work of the cargo handling is completed, the work of fixing the hook and the storage of the outrigger must be performed in the reverse order of the above. For this reason, at each collection site, the crane mechanism must be prepared and stored before and after cargo handling, resulting in poor work efficiency.

[Means for solving problems]

The present invention relates to a vehicle having a movable vehicle body, an outrigger mechanism attached to the vehicle body for fixing the vehicle body, and a crane mechanism mounted on the vehicle body for hoisting heavy objects. The present invention provides a vehicle control mechanism equipped with a crane mechanism, which is characterized in that the operations are performed simultaneously.

[Action]

In the present invention, the outrigger mechanism and the crane mechanism are attached to the vehicle body of the vehicle, and in order to set the outrigger mechanism and the crane mechanism to the initial state, it is completed by simply pressing the button for starting. That is, the outrigger mechanism can be extended to fix the vehicle body to the ground, and the hook of the crane mechanism can be automatically pulled out from the boom to wait for cargo handling.

Therefore, it is not necessary for the worker to individually operate the outrigger mechanism and the crane mechanism to prepare for the initial state for operating the crane mechanism, and two processes can be performed by a single operation. The same applies to the case where the outrigger mechanism is housed and the hook of the crane mechanism is fixed at the same time, and the two mechanisms are operated at the same time only by instructing to stop the work, and the operator is not burdened at all.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a truck embodying a vehicle control mechanism equipped with a crane mechanism according to the present invention.

The truck 1 which is a vehicle has a conventionally well-known structure, and front and rear wheels 3 and 4 are pivotally supported on the front and rear and left and right sides of the vehicle body 2, and can freely move. A cabin 5 mounted by a driver or the like is fixed to the upper portion of the front wheel 3,
A luggage carrier 6 for loading luggage is fixed to the latter half of the vehicle body 2. Further, an outrigger mechanism 7 that extends to the left and right of the vehicle body 2 is fixed between the cabin 5 and the cargo bed 6.
Similarly, a crane mechanism 8 for lifting a load is mounted between the cabin 5 and the loading platform 6.

Next, FIG. 2 is a perspective view for explaining the outrigger mechanism 7 in detail.

Two outer booms 10, 11 are fixed in parallel on the frame of the vehicle body 2 in a direction perpendicular to the front-back direction of the vehicle body 2. The outer booms 10 and 11 are hollow inside, their open ends are oriented in opposite directions, and the middle booms 12 and 13 are slidably inserted from the open ends. Inside the outer booms 10 and 11, extension cylinders 14 and 15 for extending and retracting the middle booms 12 and 13 from the outer booms 10 and 11 are provided.
Is stored.

Outriggers 16 and 17 are fixed to the tips of the middle booms 12 and 13 in the vertical direction. This outrigger
The inside of 16 and 17 is hollow, and the jack 1
8 and 19 are slidably inserted. Then, jack cylinders 20 and 20 are provided on the outriggers 16 and 17, respectively.
The jack cylinders 20 and 21 allow the jacks 18 and 19 to slide up and down.

Next, FIG. 3 shows the arrangement of the position detecting means in the outrigger mechanism 7.

A limit switch 22 is fixed on the inner upper surface of the middle boom 13, and the limit switch 22 is an extension cylinder.
It is in a position to be exposed from the outer boom 11 when the maximum extension is made. Further, a limit switch 23 is fixed to a side surface of the outrigger 17 at a position where the extension cylinder 15 comes into contact with the outer boom 11 when the extension cylinder 15 is contracted to the minimum.

In addition, limit switches are installed above and below the jack 19.
24 and 25 are fixed. The limit switch 24 is fixed to a position exposed from the inside of the outrigger 17 when the jack cylinder 21 is extended to the maximum. further,
The limit switch 25 is located at a position where the jack cylinder 21 is contracted to the minimum and the jack cylinder 21 is contacted when the jack 19 is housed in the outrigger 17.

4 and 5 show the detailed structure of the crane mechanism 8. FIG. 3 shows a state in which the boom of the crane mechanism 8 is contracted to the minimum, and FIG. 4 shows a state in which the boom of the crane mechanism 8 is maximally extended.

A mast 31 is fixed to the center of the vehicle body 2 so as to be perpendicular to the vehicle body 2. The mast 31 has a well-known structure that can be horizontally swung by a hydraulic motor (not shown). The crane mechanism 8 is connected to the upper end of the mast 31.

The crane mechanism 8 includes an original boom 32 having a hollow inside and a hollow middle boom housed inside the original boom 32 to freely move back and forth.
It is composed of a middle boom 33 and a front boom 34 that is inserted into the middle boom 33 so as to be able to move forward and backward, and has a structure capable of expanding and contracting in three stages. The rear end of the former boom 32 is connected by the mast 31 and the pin 35 so as to be vertically restrained. In addition, a depression-use hydraulic cylinder 36 is interposed between the mast 31 and the original boom 32, and the original boom 32 can be vertically swung by the hydraulic cylinder 36.

A winder 37 is fixed to the back surface of the mast 31, and a winding drum 38 of the winder 37 is driven by a hydraulic motor 39. Is wound. A head 41 accommodating a pulley for reversing the wire 40 is fixed to the tip of the tip boom 34, and a reversing body 42 is vertically swingably connected to the lower portion of the head 41. A hook is provided below the reversing body 42.
A hook receiver 44 having 43 is connected. The wire 40 is extended from the head 41 in the hook receiving direction 44 via a pulley 45 provided on the upper portion of the mast 31.

Next, FIG. 6 is an enlarged view of the vicinity of the head 41 and the hook receiver 44. In Figure 6, the tip boom
34 shows the state in which 34 is maximally extended and the wire 40 is hanging from the head 41.

This head 41 is formed by bending a steel plate into a U-shape, the lower end opening of this U-shape is directed downward, and the shaft support plates 50 and 51 on both sides are vertical. It is located in Pulleys 52 and 53 are inserted between the shaft support plates 50 and 51, and the pulleys 52 and 53 are the shaft support plates.
It is rotatably supported by a shaft 54 held between 50 and 51. Further, a reversing body 42 having a U-shaped cross section is connected to the outside of the shaft supporting plates 50 and 51, and both ends of the reversing body 42 are connected to the shaft supporting plates 50 and 51 by shafts 56. . This axis 56
Is slightly offset from the shaft 54 toward the boom 34 side. A limit switch 57 that contacts the reversing body 42 is fixed at a position outside the shaft support plate 50 and above the shaft 54. A pulley 58 is pivotally supported inside the hook receiver 44.

Then, the wire 40 drawn out from the winding drum 38 is inverted downward by the pulley 52 and then inverted upward by the pulley 58 in the hook receiver 44. The wire 40 directed upward is then inverted in its direction by the pulley 53, and the tip of the wire 40 is connected to the upper portion of the hook receiver 44.

Next, a slightly wedge-shaped actuating body 60 is fixed to the tip side surface of the middle boom 33. A limit switch 61 is fixed to the side surface of the front end of the former boom 32, and the limit switch 61 can come into contact with the operating body 60 to operate. Also, in the middle of the middle boom 33, the middle boom
A limit switch 62 that moves with 33 and comes into contact with the inner wall surface of the original boom 32 is attached. This limit switch 62
Is operated at the tip end position of the original boom 32, and the position at which the limit switch 62 is operated is moved by a length such that the head 41 extends and the hook receiver 44 can be lowered as shown in FIG. It is set to the state.

Next, FIG. 7 shows a hydraulic circuit in this embodiment.

The hydraulic pump 80 driven by the engine 81 has its suction side connected to a hydraulic tank 82, and the discharge side of the hydraulic pump 80 is connected to solenoid valves 84, 130, 131. In FIG. 7, the right side in the figure shows the hydraulic circuit of the crane mechanism, and the left side shows the hydraulic circuit of the outrigger mechanism.

First, the solenoid valve 84 is a three-way switching type, and one output of this solenoid valve 84 is a manual switching valve 85 for moving the wire 40 up and down and a manual switching valve 86 for extending and retracting the boom.
Are connected in parallel. The other output of the solenoid valve 84 is connected to solenoid valves 90 and 91 via pressure reducing valves 87 and 88, respectively. The output of the switching valve 85 is connected to a hydraulic motor 39 for driving the winding drum 38, and the output of the switching valve 86 is stored inside the original boom 32, and the middle boom 33 from the original boom 32, It is connected to a hydraulic cylinder 93 for expanding and contracting the tip boom 34. And
An oil passage for return oil is connected to the switching valves 85, 86, and this oil passage for return oil communicates with the oil tank 82. At the same time, a return oil passage is connected to each of the solenoid valves 84, 90, 91, and this return oil passage communicates with the oil tank 82.

Throttle valves 94 and 95 are connected to both output sides of the solenoid valve 90, and the hydraulic motor is connected through the throttle valves 94 and 95.
39 is connected. Check valves 96 and 97 are connected in parallel to both ends of the throttle valves 94 and 95, respectively. Further, throttle valves 98 and 99 are connected to both output sides of the electromagnetic valve 91, respectively, and the hydraulic cylinder 93 is connected via the throttle valves 98 and 99. Check valves 100 and 101 are connected in parallel to both ends of the throttle valves 98 and 99, respectively. The throttle valves 94, 95, 98, 99 respectively control the flow rate of oil, and the set positions thereof will be described later.

The solenoid valve 130 is of a three-way switching type, and the extension cylinders 14 and 15 are connected in parallel to the solenoid valve 130. Similarly, the solenoid valve 131 is also a three-way switching type.
Jack cylinders 19 and 20 are connected to 31 in parallel.

Next, FIG. 8 shows an electric circuit diagram of the control system in this embodiment.

In this figure, the right side shows the control circuit of the crane mechanism 8, and the left side shows the control circuit of the outrigger 7.

Each of the limit switches 57, 61 and 62 has a relay 10
6, 108 and 109 are connected in series. And relay 1
A relay 105 is connected in series to a contact 110 operated by 08. A coil 84A is connected to a normally closed contact 112 operated by the relay 105, and a coil 84A is connected to a normally open contact 113 operated by the relay 105 at the same time.
84B is connected in series.

The switches 114, 118 and 140, 114 are of a type that are controlled in conjunction with each other at the same time, and are used for instructing the initial operation setting and storage operation of the outrigger mechanism 7 and the crane mechanism 8.

Of these, the coil 91A is connected in series to the push-out side of the switch 114, and the contact 117 operated by the relay 106 and the coil 71B are connected in series to the contact on the pull-in side of the switch 114. Further, a contact 119 operated by the relay 106 and a coil 90A are connected in series to the contact on the push-out side of the switch 118. The normally closed contact 120 operated by the relay 109 and the coil 90B are connected in series to the contact on the retracting side of the switch 118.

Next, in the control circuit of the outrigger 7, the limit switches 22, 23, 24 and 25 are connected in series with the relay 13 respectively.
5, 136, 137, 138 are connected. Further, a contact 139 operated by a relay 135 and a coil 130A are connected in series to the push-out side of the switch 114 which is interlocked with the above-mentioned switches 114 and 118. Further, a contact 140 operated by the relay 138, a normally closed contact 141 operated by the relay 136, and a coil 130B are connected in series to the contact on the retracting side of the switch 140. Further, a normally closed contact 142 operated by a relay 135, a contact 143 operated by a relay 137, and a coil 131A are connected in series to the push-out side of the switch 141. The normally closed contact 144 controlled by the relay 138 and the coil 131B are connected in series to the retracting side of the switch 141.

Next, the operation of this embodiment will be described.

FIG. 1 shows a state in which the outrigger mechanism 7 is slightly extended, and the crane mechanism 8 is in a retracted state.
FIG. 3 shows a state in which the outrigger mechanism 7 is extended and the vehicle body 2 is being lifted. 4 shows a state in which the crane mechanism 7 is stored and the truck 1 is moving. The hook 43 and the hook receiver 44 are pulled up and fixed to the tip boom 34, respectively. . Further, FIG. 5 shows a state in which the middle boom 33 is pushed out from the original boom 32, and shows a state in which the crane mechanism 8 is ready to be operated in this state.

These outrigger mechanism 7 and crane mechanism 8 are operated simultaneously. The outrigger mechanism 7 is extended to the left and right, and the jacks 18 and 19 are brought into contact with the ground to lift the vehicle body 2 to prevent it from falling. Then, the hook 43 of the crane mechanism 8 is lowered to prepare for cargo handling. After this, mast 31
Is rotated with respect to the vehicle body 2, and at the same time, the original boom 32 is restrained by the hydraulic cylinder 36, and the wire 40 is wound and unwound to move the hook 43 up and down, thereby loading a heavy load on the platform 6. However, it is possible to load and unload.

"Operation for preparation for work" In a vehicle equipped with the crane mechanism 8, first, an operation for preparation for loading and unloading must be performed before the operation. This preparation operation includes fixing the outrigger mechanism 7 and pulling out the crane mechanism 8. Although these individual operations are performed at the same time, they will be described separately in the description.

[Fixation of Outrigger Mechanism 7] In the outrigger mechanism 7, when the truck 1 is moving, the middle booms 12 and 13 are housed in the outer booms 10 and 11, respectively, and at the same time, the jacks 18 and 19 are outriggers 16 and 17.
Being lifted inside. For this reason, jacks 18, 19
The bottom edge of is not in contact with the ground. From this state, the vehicle body 2 is lifted and preparations for work are started.

At this time, limit switches 22, 23, 2 set for each part
4 and 25 are closed, and each relay 1
Since 35, 136, 137, 138 are operating, contacts 139, 143
Are closed and contacts 142 are open.

In this state, four switches 114, 118, 140, 141
Switch to the extrusion side respectively, via contact 139,
A current flows through the coil 130A and connects the solenoid valve 135 to the positive side. Then, the pressure oil from the hydraulic pump 80 is supplied to the extension cylinders 14 and 15, respectively, and acts so as to push the middle booms 12 and 13 from the outer booms 10 and 11 in the left and right lateral directions, respectively. The middle booms 12, 13 are the outer booms 10, 13
When pushed out from 11, the limit switch 22 is opened and the relay 135 is stopped, so that the contact 139 is opened and no current flows through the coil 130A. From this, the solenoid valve
130 stops, pressure oil does not flow to the extension cylinders 14 and 15, and the middle booms 12 and 13 stop in their extended state.

At the same time, by stopping the relay 135, the contact 142 is closed, so that a current flows through the coil 131A to switch the solenoid valve 131 to the positive side. Therefore, pressure oil is supplied to the jack cylinders 20 and 21, respectively, and the jacks 18 and 19 are outriggered.
The lower ends of the jacks 18 and 19 are pushed downward from the parts 16 and 17, and come into contact with the ground to act to lift the vehicle body 2. If the jacks 18 and 19 are extended by a predetermined length, the limit switch 24 opens and the relay 137 stops.
43 is opened and the solenoid valve 131 is neutral and held in that position.

By this series of operations, the extension of the middle booms 12 and 13 and
The lifting operation of the jacks 18 and 19 is performed, and the vehicle body 2 is fixed so as not to fall.

[Preparation Operation of Crane Mechanism 8] FIG. 4 shows a state in which the crane mechanism 8 is on standby, and at this time, the limit switches 57, 61 and 62 are closed. Therefore, the relays 106, 108, 109 are operating,
The contacts 117, 119, 110 are closed and the contact 120 is open. Further, since the relay 108 is operating, the contact 110 is closed, and because the relay 105 is operating, the contact 112 is open and the contact 113 is closed.

As described above, since the switches 114 and 118 are switched to the pushing side, currents are flowing through the coils 91A and 90A, respectively, and the switching valves 90 and 91 are switched to the positive side. In the state before this, since current is flowing in the coil 84B, the pressure oil from the hydraulic pump 80 passes through the pressure reducing valves 87, 88 and the solenoid valve 9
It flows to 0 and 91 and is supplied to the hydraulic cylinder 93 and the hydraulic motor 39 via the throttle valves 94, 95, 98 and 99, respectively.

For this reason, the winding drum 38 is rotated by the hydraulic motor 39, the wire 40 is pulled out from the winding drum 38, and the wire 40 starts to loosen. At the same time, the middle boom 33 and the front boom 34 are pushed out of the former boom 32 by the hydraulic cylinder 93.

At this time, the flow rate of the pressure oil flowing through the throttle valves 94, 98 is set in advance so that the flow rate on the throttle valve 94 side is increased, and the hydraulic motor 39 precedes and operates to rewind the wire 40 a little earlier. To do. Therefore, the amount of extension of the middle boom 33 and the front boom 34 operated by the hydraulic cylinder 93 is
That's a little later than the 40 return amount. Thus
When the wire 40 loosens, the reversal body 42 pulled up by the pulling force of the wire 40 may tilt slightly downward due to the looseness of the wire 40 and may be separated from the limit switch 57. However, when the limit switch 57 is opened, the relay 106 stops its operation and the contact 119 is opened.
Therefore, no current flows through the coil 90A, and the operation of the hydraulic motor 39 is temporarily stopped. However, since current is still flowing in the coil 91A and the solenoid valve 90 is in communication, the hydraulic pressure continues to be supplied and the hydraulic cylinder 93 continues to operate, so that the middle boom 33 and the front boom 34 are not pushed out. Continue to work. By the pushing operation of the middle boom 33 and the front beam 34, the wire 40 is relatively pulled in, so that the reversing body 42 is lifted up and the limit switch 57.
By pressing again to operate the relay 106, the contact 119 is closed, a current is passed through the coil 90A, the hydraulic motor 39 is operated in the same manner as described above, and the wire 40 is rewound. That is, the limit switch 57 allows the extension amount of the boom to follow the rewinding amount of the wire 40.

By repeating such an operation, the reversing body 42 does not drop downward, and the hook receiver 44 is always pushed out while being held at the tip of the front boom 34.

In this way, the middle boom 33 and the front boom 34 are pushed out from the original boom 32, and finally the head 42 moves until it largely projects as shown in FIG. At this time, the middle boom 33
Means that the limit switch 62 fixed to the side surface of the middle boom 33 is exposed to the outside from the tip of the former boom 32, and the limit switch 62 is thereby extended.
Is opened and the relay 108 is operated. Therefore, contact 1
10 is closed, and contact 1 by connecting relay 105
12 is opened and at the same time the contact 113 is closed, and a current is passed through the coil 84A. Therefore, the solenoid valve 84 is switched and the hydraulic pump
The pressure oil from 80 does not flow to the solenoid valves 90 and 91, and the switching valves 85 and 86
It is transmitted in the direction.

Therefore, the switching valves 85 and 86 can be manually controlled. In this state, preparations for cargo handling are completed. After that, the operator manually operates the switching valves 85 and 86 to individually control the hydraulic motor 39 and the hydraulic cylinder 93.

Explaining this operation, first, by operating the switching valve 85, the hydraulic motor 39 rotates, and by rewinding the wire 40, the hack receiver 44 moves downward. In addition, the switching valve 86
By operating the hydraulic cylinder 93,
The head 41 can be extended. Then, in the lifting operation of the heavy object, the wire 43 is wound up by hooking the hook 43 on the hook receiver 44 of the crane mechanism 8 and operating the hydraulic motor 39 by operating the switching valve 85, whereby the heavy object is Can be lifted. Then, after lifting the heavy object, the position can be moved in the horizontal direction by operating the hydraulic cylinder 93 if necessary. Further, by turning the mast 31, it is possible to unload a heavy object from the loading platform 6 to the ground, or to transfer the heavy object from the ground to the loading platform 6.

Next, the storing operation for moving the truck 1 from the state where the outrigger mechanism 7 is extended and the crane mechanism 8 is in the preparation stage as described above will be described. Regarding this operation, two operations, that is, the storage of the outrigger mechanism 7 and the storage of the crane mechanism 8 proceed simultaneously. However, for the sake of explanation, each operation will be described individually.

"Housing of Outrigger Mechanism 7" When housing the outrigger mechanism 7, the four switches 114, 118, 140, 141 are switched to the retracting side, respectively. As described above, the limit switches 22, 23, 24, 25 are open, and the relays 135, 136, 137, 138 are inactive. Therefore, the current flows only through the normally closed contact 114, and the current flows through the coil 131B. Therefore, the solenoid valve 131
Switches in the opposite direction and supplies hydraulic pressure to the jack cylinders 19 and 20, respectively. The jack cylinders 19 and 20 pull up the jacks 18 and 19 on the left and right. When the jacks 18 and 19 are pulled up and the jacks 18 and 19 are pulled up to the shortest positions in the outriggers 16 and 17, the limit switch 25 closes and the relay 138 operates,
Contact 144 opens and at the same time contact 140 closes.

Then, no current flows through the coil 131B, and the contact 14
An electric current flows in the coil 130B via 0 and 141 in reverse. Then, the solenoid valve 131 returns to the neutral position, and the solenoid valve 130 is connected in the reverse direction. Therefore, the extension cylinders 14 and 15 start contracting, and act so as to retract the left and right middle booms 12 and 13 inward of the outer booms 10 and 11.

In this way, the operations of the jack cylinders 20 and 21 and the operations of the extension cylinders 14 and 15 are continuously and automatically switched. Then, when the middle booms 12 and 13 are retracted into the outer booms 10 and 11 and retracted to the innermost position, the limit switch 23 is closed and the relay 136 is operated. As a result, the normally closed contact 141 is opened, current no longer flows through the coil 130B, the switching valve 130 returns to the neutral state, and the extension cylinders 14 and 15 stop at that position.

[Housing of Crane Mechanism 8] Next, the crane mechanism 8 simultaneously starts the hoisting operation by switching the switches 114 and 118. In this stored state, the wire 40 is suspended from the head 41, and the hook 43 and the hook receiver 44 are suspended in the air. If the truck 1 is moved in this state, the hook 43 and the hook receiver 44 sway and come into contact with other mechanisms of the vehicle, causing an accident such as damage. Therefore,
The hook receiver 44 must be fixed to the head 41.

Prior to this operation, the middle boom 33 must be slightly retracted toward the former boom 32 by hand. First, the switching valve 86 is manually operated to reduce the hydraulic cylinder 93. Then, the hydraulic cylinder 93 has the middle boom 33 and the front boom.
Move 34 in the direction of the original boom 32 and operate so that the total length becomes shorter. When the middle boom 33 is pulled into the former boom 32 to some extent, the limit switch 62 fixed to the side surface of the middle boom 33 comes into contact with the inner surface of the former boom 32, and the limit switch 62
Is closed. By closing this limit switch 62,
Since relay 108 stops its operation and contact 110 is closed at the same time, relay 105 operates, contact 112 opens and contact 110
113 closes. Therefore, the switching valve 84 is switched in the reverse direction, and the pressure oil from the hydraulic pump 80 does not flow in the switching valves 85 and 86, and the pressure oil is transmitted only to the solenoid valves 90 and 91.

Then, in this state, as described above, the switches 114, 1
Since 18 is switched to the retracting side, no current flows through the coil 91B, but current flows through the coil 90B, and pressure oil flows through the pressure reducing valve 87, solenoid valve 90, and throttle valve 95 to the hydraulic motor 39.
Flows in the opposite direction. Return oil from the hydraulic motor 39 is returned to the oil tank 82 via the check valve 96. When the hydraulic motor 39 rotates, the wire 40 is sequentially wound and the hook receiver 44 rises. The initial stage of raising the hook receiver 44 is shown in FIG. 9 (a).

When the wire 40 is wound up, the hook receiver 44 eventually comes into contact with the lower end of the reversing body 42 (9th position).
See figure (b)). When this happens, the hook receiver
44 is the limit that can no longer be lifted.

Even in this state, when the hydraulic motor 39 further rotates to wind up the wire 40, the hook receiver 44 is in contact with the lower surface of the reversing body 42, so that the pulling force is centered on the shaft 56 and the hook It acts to lift the receiver 44 and the entire reversal body 42. Therefore, as shown in FIG. 9C, the hook receiver 44 and the reversing body 42 rotate upward about the shaft 56,
Finally, the reversing body 42 rotates until it contacts the limit switch 57.

Then, when the reversing body 42 comes into contact with the limit switch 57, the relay 106 operates and the contact 117 is closed. Therefore, a current flows through the coil 91B, the switching valve 91 is switched, and the pressure from the hydraulic pump 80 is reduced by the pressure reducing valve 88, the solenoid valve 91, and the throttle valve 99.
Is transmitted to the hydraulic cylinder 93 via. Then, the return oil from the hydraulic cylinder 93 is returned to the oil tank 82 via the check valve 100.

In this way, the hook receiver 44 is held integrally with the head 41 in the state where the reversal body 42 is held in contact with the head 41, and does not shake due to vibration or the like. After that, as long as the switches 114 and 118 are switched to the retracted side, the hydraulic motor 39 and the hydraulic cylinder 93 operate simultaneously. That is, at the same time when the wire 40 is wound up, the middle boom 33 and the front boom 34 are drawn into the inside boom 32.

During this operation, the amount of oil flowing through the throttle valve 99 is set larger than the amount of oil flowing through the throttle valve 95, so the middle boom 3
3. The speed at which the tip boom 34 contracts is faster than the speed at which the wire 40 is wound. Therefore, the wire 40 may loosen during continuous operation, but in this case, the relay 106 temporarily stops operating until the reversing body 42 separates from the limit switch 57, and the contact 117 opens. To be done. Therefore, current does not flow through the coil 91B temporarily, and the operation of the hydraulic cylinder 93 is temporarily stopped. However, since the hydraulic motor 39 continues to operate, the wire
40 is sequentially wound up and acts to pull up the reversal body 42. Then, as described above, the reversing body 42 is the limit switch.
When it comes into contact with 57, the relay 106 is operated to close the contact 117, and a current is passed through the coil 91B to follow the operation of the hydraulic cylinder 93. By repeating such a follow-up operation by the hydraulic cylinder 93, the hook receiver 44 and the reversing body 42 are always held by the head 41, and the middle boom 33 and the tip boom 34 are kept.
Will be retracted inside the former boom 32.

Then, when the hydraulic cylinder 93 contracts and the middle boom 33 and the front boom 34 are retracted to the inside of the former boom 32, the actuation body 60 comes into contact with the limit switch 61. Therefore, the limit switch 61 actuates the relay 109 to open the contact 120 and close the contact 123. Therefore, no current flows through the coil 90B, the hydraulic motor 39 stops its operation, the winding operation by the wire 40 is stopped, and the retracting operation of the crane mechanism 8 is completed.

By this series of operations, the operation of retracting the outrigger and the operation of retracting the crane mechanism 8 are completed in parallel, and the truck 1
Is ready to move. After that, the driver can get into the cabin 5 and drive it, so that the truck 1 can move on the road like a normal vehicle.

〔The invention's effect〕

Since the present invention is configured as described above, in a vehicle equipped with a crane mechanism, an outrigger provided to prevent falling can be operated simultaneously with the crane mechanism. Therefore, the preparation for the start of the cargo handling work is easily performed, and the operation is extremely simple. Further, even when the vehicle is to be moved after the loading and unloading work is completed, the outrigger mechanism and the crane mechanism can be respectively prepared to be stored and moved by a simple operation.

Therefore, like a truck with a crane mechanism, when the driver moves the vehicle alone and the cargo handling work is also performed by the driver, it does not place an excessive burden on the operator and the cargo handling time Can be extremely shortened.

[Brief description of drawings]

FIG. 1 is a perspective view showing an appearance of a truck equipped with a crane mechanism showing an embodiment of the present invention, FIG. 2 is a partially enlarged view showing a main part of an outrigger mechanism, and FIG. 3 is a side view showing a configuration of an outrigger. Figures and 4 are side views showing the crane mechanism with the boom retracted, Fig. 5 is a side view showing the crane mechanism with the boom extended a little about half, and Fig. 6 shows the head and hook receiving parts. FIG. 7 is an enlarged perspective view showing the same, FIG. 7 is a circuit diagram showing a hydraulic system in the present embodiment, FIG. 8 is a circuit diagram showing an electric control system of the same, and FIG. 9 is an explanatory diagram showing operations of a hook receiver and a reversing body. FIG. 10 is a flowchart showing the preparation operation in this embodiment, and FIG. 11 is a flowchart showing the storage operation in this embodiment. 1 ... Truck, 2 ... Car body, 7 ... Outrigger mechanism, 8 ... Crane mechanism.

Claims (1)

[Claims] 1. A vehicle having a movable vehicle body, an outrigger mechanism attached to the vehicle body for fixing the vehicle body, and a crane mechanism mounted on the vehicle body for hoisting heavy objects, the operation of the outrigger mechanism and the crane mechanism. A vehicle control mechanism equipped with a crane mechanism that is characterized by the simultaneous operation.