JP3917892B2 - Outrigger device for work vehicle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an outrigger device for a work vehicle in which a swivel with a driver's seat is slidably mounted on a vehicle portion having an outrigger that is extended and stored by a hydraulic cylinder.
[0002]
[Prior art]
An outrigger drive hydraulic pump for generating pressure oil to be supplied to a hydraulic cylinder in which the outrigger is extended and retracted is connected and driven via a PTO to a traveling engine of a work vehicle. It has been known.
[0003]
FIG. 4 is a block diagram showing a configuration of a conventional outrigger device. The left half of the turning center 1 shows the configuration of the turntable portion, and the right half shows the configuration of the vehicle portion. Reference numeral 2 denotes an upper controller arranged in the swivel part, and 3 denotes a lower controller arranged in the vehicle part. Signals are exchanged between the upper controller 2 and the lower controller 3 via a slip ring 4 built in a swivel joint disposed at the turning center 1. Reference numeral 5 denotes an upper outrigger operating device arranged at the driver's seat of the swivel base, and an operation signal of the upper outrigger operating means 5 is output to the upper controller 2.
[0004]
Reference numeral 6 denotes an outrigger valve means arranged in the vehicle portion, which is interposed between a hydraulic cylinder for extending and retracting the outrigger and an outrigger driving hydraulic pump, and switches the outrigger valve means 6. Thus, the outrigger is extended and stored. Reference numeral 7 denotes a lower outrigger operating means disposed in the vehicle portion. An operation signal of the lower outrigger operating means 7 is output to the lower controller 3 and the outrigger valve means 6.
[0005]
Reference numeral 8 denotes a PTO operation means arranged in the driver's seat of the turntable portion, and an operation signal is directly output to the PTO 10 of the vehicle portion via a slip ring 9 built in a swivel joint arranged at the turn center 1. The
[0006]
The outrigger operation by the above-described outrigger device is as follows. First, the operator gets into the driver's seat provided on the turntable and operates the PTO operation means 8 to the PTO connection side. Then, the PTO 10 is connected, the power of the traveling engine is transmitted to the outrigger driving hydraulic pump, and the hydraulic pressure is supplied to the outrigger valve means 6. Next, when the operator operates the upper outrigger operation means 5, an outrigger operation signal is output to the outrigger valve means via the upper controller 2, the slip ring 4 and the lower controller 3. Then, the outrigger valve means 6 is switched and the outrigger is extended and stored.
[0007]
Alternatively, the operator once operates the PTO operation means 8 to the PTO connection side in the driver's seat and then operates the lower outrigger operation means 7 by getting out of the driver's seat and operating the outrigger valve means 6 to switch the outrigger. Overhang storage operation is possible.
[0008]
[Problems to be solved by the invention]
As described above, when the outrigger is extended and stored by the upper outrigger operating means 5 or the lower outrigger operating means 7, the conventional outrigger device must always operate the PTO operating means 8 to the connection side before that operation. The connection operation was troublesome. In particular, when the outrigger overhanging operation is to be performed by the lower outrigger operating means 7, if the user notices that the PTO connection operation at the driver's seat has been forgotten, he must return to the driver's seat on the swivel again. In this case, the outrigger operation was very troublesome.
[0009]
Therefore, the present invention is configured so that when the upper outrigger operating means 5 or the lower outrigger operating means 7 is operated, the PTO 10 is connected regardless of the operating state of the PTO connecting means 8, thereby solving the above-mentioned problem. Is to provide.
[0010]
In addition, in order to solve the above problem, an outrigger device having an alarm function for preventing forgetting to turn off the PTO after the end of the outrigger operation when the PTO connection is made in conjunction with the outrigger operation is provided. To do.
[0011]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided an outrigger device for a work vehicle in which a swivel base having a driver's seat is slidably mounted on a vehicle portion having an outrigger that is extended and stored by a hydraulic cylinder. An outrigger drive hydraulic pump is connected to the engine for use via a PTO whose transmission power can be interrupted, and the hydraulic cylinder can be supplied with hydraulic pressure by inserting an outrigger valve means between the outrigger drive hydraulic pumps. In addition, the driver seat is provided with an upper outrigger operating means and a PTO operating means, the vehicle section is provided with a lower outrigger operating means, and the PTO operating means enables the PTO to be intermittently operated, and the upper outrigger The outrigger is extended and retracted by switching the outrigger valve means with the operating means or the lower outrigger operating means. In an outrigger device for a work vehicle that can be operated, when the upper outrigger operating means or the lower outrigger operating means is operated, the PTO is connected regardless of the operating state of the PTO operating means.
[0012]
As described above, since the PTO is intermittently operated in conjunction with the operation of the upper outrigger operating means or the lower outrigger operating means, it is necessary to connect and operate the PTO by the PTO operating means prior to the outrigger operation by the outrigger operating means. There is no longer a forgotten connection to the PTO.
[0013]
Furthermore, the outrigger device for a work vehicle described in claim 2 of the present application is configured so that, in addition to the configuration of claim 1, the upper outrigger operating means and / or the lower outrigger operating means selects expansion or contraction of the hydraulic cylinder. An expansion / reduction selection switch that performs an expansion / reduction operation of the hydraulic cylinder, and when the expansion / reduction selection switch is selected, the PTO is operated regardless of the operation state of the PTO operation means. After being connected and selecting and operating the expansion / contraction selection switch, an alarm is issued when the operation execution switch is not operated for a predetermined time.
[0014]
With this configuration, when the expansion / reduction selection switch linked to the PTO connection operation is selected and the PTO is connected, an alarm is issued if the operation execution switch is not operated for a predetermined time. It is possible to realize that the selected state remains, that is, the PTO remains in the connected state and forgotten to cut.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a block diagram of a configuration of an outrigger device for a work vehicle according to an embodiment of the present invention. The configuration common to the block diagram of the conventional outrigger device shown in FIG. 4 has the same number and the description thereof is omitted.
[0016]
21 is a signal path for connecting the signal paths 22 and 23 so as to branch from the outrigger operation signal path 22 from the upper outrigger operation means 5 to the upper controller 2 and to join the signal path 23 from the PTO operation means 8 to the PTO 10. is there. By providing the signal path 21, the PTO 10 is connected and operated in conjunction with the operation of the upper outrigger operating means 5 regardless of the operating state of the PTO operating means 8.
[0017]
Reference numeral 24 denotes a signal path provided to connect the lower outrigger operating means 7 and the PTO 10. By providing such a signal path 24, regardless of the operation state of the PTO operation means 8, when the lower outrigger operation means 7 is operated, the PTO 10 is connected and operated. Therefore, when performing the outrigger operation, the trouble of performing the PTO connection operation by the PTO connection means 8 is eliminated.
[0018]
Reference numeral 25 denotes alarm means provided in the driver's seat of the swivel base, and a signal from the upper controller 2 when the operation content of the upper outrigger operation means 5 or the lower outrigger operation means 7 becomes a predetermined condition to be described later. The alarm is activated by.
[0019]
FIG. 2 illustrates a specific configuration of the PTO 10 and the outrigger valve means 6 described above.
[0020]
The PTO 10 is interposed between the traveling engine 30 and the outrigger driving hydraulic pump 33 so that the power of the traveling engine 30 can be intermittently transmitted to the outrigger driving hydraulic pump 33. That is, 31 is a torque converter that is integrally connected to the flywheel at the rear of the traveling engine 30 and rotates, and the PTO gear 35 is rotated by the power take-off gear 34 that rotates integrally with the torque converter 31. Reference numeral 36 denotes a wet multi-plate clutch that transmits the power transmitted to the PTO gear 35 to the outrigger driving hydraulic pump 33. A pressure of a hydraulic pump 38 that is always driven by the traveling engine 30 is applied to the wet multi-plate clutch 36 through an electromagnetic switching valve 37 so as to be intermittent. A signal path 23 from the PTP operating means 8 or the upper outrigger operating means 5 and a signal path 24 from the lower outrigger means 7 are connected to the electromagnetic switching valve 37.
[0021]
A pump oil passage 39 connects the discharge side of the outrigger driving hydraulic pump 33 and the pump port of the telescopic electromagnetic switching valve 41 of the outrigger valve means 6 described later.
[0022]
Reference numeral 6 denotes an outrigger valve means, which includes an expansion / contraction electromagnetic switching valve 41 and a slide jack electromagnetic switching valve 42. Reference numeral 43 denotes a slide cylinder, and 44 denotes a jack cylinder, which constitutes a hydraulic cylinder that projects and stores an outrigger.
[0023]
The expansion / contraction electromagnetic switching valve 41 has a switching position of a neutral position 41a, an extension position 41b, and a contraction position 41c, and is switched by a switching operation signal from the lower controller 3 or the lower outrigger operating means 7 described above. The telescopic electromagnetic switching valve 41 shown in FIG. 2 is in a state where no switching operation signal is input and is in the neutral position 41a. The slide jack electromagnetic switching valve 42 has a switching position of a neutral position 42a, a slide position 42b, and a jack position 42c, and is switched by a switching operation signal from the lower controller 3 or the lower outrigger operating means 7 described above. . The slide jack electromagnetic switching valve 42 shown in FIG. 2 is in a state where no switching operation signal is input and is in the neutral position 42a.
[0024]
An extension oil passage 45 connects the extension port of the expansion / contraction electromagnetic switching valve 41 and the pump port of the slide jack electromagnetic switching valve 42. Reference numeral 47 denotes a slide extension oil passage that connects the slide port of the slide jack electromagnetic switching valve 42 and the extension side oil chamber of the slide cylinder 43. Reference numeral 48 denotes an extension of the jack port of the slide jack electromagnetic switching valve 42 and the jack cylinder 44. This is a jack extension oil passage connecting the side oil chambers. A reduced oil passage 46 connects the reduced port of the expansion / contraction electromagnetic switching valve 41 to the reduced side oil chambers of the slide cylinder 43 and the jack cylinder 44.
[0025]
In order to simplify the explanation, only one set of the slide jack electromagnetic switching valve 42, the slide cylinder 43, the jack cylinder 44, and the oil passage connecting them is shown, but there are usually four outrigger devices for an actual work vehicle. It consists of a set, and each has the same configuration.
[0026]
The outrigger extension storing operation by the PTO 10 and the outrigger valve means 6 shown in FIG. 2 is as follows.
[0027]
When a PTO operation signal is input to the PTO 10 from the signal path 23 or 24, the electromagnetic switching valve 37 is switched to a position where the pressure of the hydraulic pump 38 is transmitted to the wet multi-plate clutch 36, and the wet multi-plate clutch 36 is in a connected state. The power of the traveling engine 30 is transmitted to the outrigger hydraulic pump 33. As a result, the outrigger hydraulic pump 33 starts to supply hydraulic pressure to the outrigger valve means 6 through the pump oil passage 39.
[0028]
Next, the slide jack electromagnetic switching valve 42 is switched to the slide position 42b or the jack position 42c by a switching operation signal from the lower controller 3 or the lower outrigger operating means 7. In this state, when the expansion / contraction electromagnetic switching valve 41 is switched to the expansion position 41b or the contraction position 41c by the switching operation signal of the lower controller 3 or the lower outrigger operating means 7, the pressure oil expands the slide cylinder 43 or the jack cylinder 44. The cylinder is supplied to the side oil chamber or the reduced side oil chamber, and the corresponding cylinder performs an expansion / contraction operation.
[0029]
FIG. 3 is a diagram for explaining a specific configuration of the upper outrigger operating means 5. The upper outrigger operating means 5 includes an operation execution switch 50, a slide jack selection switch 51, and an expansion / contraction selection switch 52. One contact of each switch is connected to the power supply line 53, and the other contact is all connected to the upper controller 2. The operation execution switch 50 is an automatic return type, and its contact is automatically opened when the operation of the switch is stopped. In addition, although what was illustrated as the operation execution switch 50 is what all the outriggers operate | move by one switch, you may make it provide the switch corresponding to each outrigger further, respectively. In this case, all the operation switches are operated when operating all outriggers at the same time, and the individual operation switches are operated when operating each outrigger independently.
[0030]
On the other hand, the slide jack selection switch 51 and the expansion / reduction selection switch 52 are self-holding type, and if the operation is performed so that one of the two contacts on the upper controller 2 side is energized, the selected contact is not changed even if the switch operation is stopped. It is designed to keep it closed.
[0031]
One contact of the PTO operation switch 8 is connected to the power line 54, and the other contact is connected to the slip ring 9 built in the swivel joint. The PTO operation switch 8 is a self-holding type, and holds its operation state once operated.
[0032]
The two signal lines 22, the PTO operation switch 8, and the slip ring 9 that connect the extension side contact and the reduction side contact of the extension / reduction selection switch 52 and the upper controller 2 are two diodes 55. Has been contacted by. Therefore, when the expansion / reduction selection switch 52 is selected to the expansion side or the reduction side, an expansion signal or a reduction signal is output to the upper controller 2, and a PTO operation signal is sent to the slip ring 9 via the diode 55. Will be sent. That is, the PTO 10 is connected regardless of the operation state of the PTO operation switch 8.
[0033]
After the above selection operation of the expansion / contraction selection switch 52, the slide jack selection switch 51 selects the side to be operated of the slide or jack. When the operation execution switch 50 is further operated, the slide or jack is actually operated by the selected expansion or contraction operation.
[0034]
On the other hand, when the expansion / reduction selection switch 52 is selected to the expansion side or the reduction side and the PTO 10 is connected and the operation execution switch 50 is not operated for a predetermined time, the upper controller 2 sends an alarm means 25 to the alarm means 25. An alarm signal is output. The alarm means 25 issues an alarm by a built-in alarm lamp or alarm buzzer. As a result, it is possible to prevent forgetting to cut in the state where the expansion / contraction selection switch 52 which is a self-holding type switch is selected, that is, while the PTO 10 is connected.
[0035]
The specific configuration of the lower outrigger operation means 7 is also substantially the same as the configuration of the upper outrigger operation means 5 described above, and thus detailed description thereof is omitted. It should be noted that the alarm means 25 can issue an alarm even if the extension / reduction selection switch of the lower outrigger operation means 7 is forgotten to return to neutral and the PTO 10 remains connected for a predetermined time. is there.
[0036]
【The invention's effect】
Since it is configured and operates as described above, in the outrigger device for a work vehicle described in claim 1 of the present application, the PTO is intermittently operated in conjunction with the operation of the upper outrigger operating means or the lower outrigger operating means. Therefore, it is not necessary to connect the PTO by the PTO operating means prior to the outrigger operation by the outrigger operating means, and it is not necessary to forget to connect the PTO. In particular, when trying to perform the outrigger operation by the lower outrigger operating means, the user is aware of forgetting to put in the PTO and is released from the troublesomeness of having to go up to the driver's seat of the swivel again.
[0037]
In the outrigger device described in claim 2 of the present application, an alarm is generated if the operation execution switch is not operated for a predetermined time in a state where the expansion / reduction selection switch interlocked with the PTO connection operation is selected and the PTO is connected. Therefore, the operator can notice that the expansion / contraction selection switch remains in the selected state, that is, the PTO has been forgotten to be disconnected in the connected state. In particular, if you forget to set the expansion / contraction selection switch of the lower outrigger operation means to be neutral and notice that you were driving the work vehicle with the PTO connected, you should stop and get off the driver's seat This eliminates the inconvenience of having to set the expansion / contraction selection switch of the outrigger operating means to neutral.
[Brief description of the drawings]
FIG. 1 is a block diagram of an outrigger device according to the present invention.
FIG. 2 is a diagram illustrating a specific configuration of a PTO and outrigger valve means according to the present invention.
FIG. 3 is a diagram illustrating a specific configuration of an upper outrigger operating means.
FIG. 4 is a block diagram of a conventional outrigger device.
[Explanation of symbols]
1 is a turning center, 2 is an upper controller, 3 is a lower controller, 4 is a slip ring, 5 is an upper outrigger operating means, 6 is an outrigger valve means, 7 is a lower outrigger operating means, 8 is a PTO operating means, and 9 is a slip Ring, 10 is PTO, 25 is alarm means, 30 is a traveling engine (PTO operation switch), 33 is an outrigger drive hydraulic pump, 41 is an expansion / contraction electromagnetic switching valve, 42 is a slide jack electromagnetic switching valve, and 43 is a slide cylinder ( (Hydraulic cylinder), 44 is a jack cylinder (hydraulic cylinder), 50 is an operation execution switch, 51 is a slide jack selection switch, 52 is an expansion / contraction selection switch

Claims (2)

A swivel with a driver's seat is mounted on a vehicle unit with an outrigger that is extended and stored by a hydraulic cylinder, and the transmission power of the hydraulic pump for driving the outrigger can be intermittently connected to the traveling engine. The hydraulic cylinder is connected via an out-trigger valve, and an out-trigger valve means is interposed between the hydraulic pumps for driving the out-trigger.
The driver seat is provided with an upper outrigger operating means and a PTO operating means, the vehicle section is provided with a lower outrigger operating means, and the PTO operating means enables intermittent operation of the PTO, and the upper outrigger operating means or In an outrigger device for a work vehicle that allows the outrigger to be extended and retracted by switching the outrigger valve means with a lower outrigger operation means,
An outrigger device for a work vehicle, wherein when the upper outrigger operating means or the lower outrigger operating means is operated, the PTO is connected regardless of the operating state of the PTO operating means. The outrigger device for a work vehicle according to claim 1,
The upper outrigger operation means and / or the lower outrigger operation means includes an expansion / contraction selection switch for selecting expansion or contraction of the hydraulic cylinder, and an operation execution switch for executing expansion / contraction operation of the hydraulic cylinder. ,
When the expansion / reduction selection switch is selected, the PTO is connected regardless of the operation state of the PTO operation means, and after the selection operation of the expansion / reduction selection switch, the operation execution switch is not operated for a predetermined time. An outrigger device for a work vehicle characterized by being configured to issue an alarm.

Images