JPS58116239A - Self-propelling work bogie - Google Patents

Abstract

PURPOSE:To promote the safety of work in a slope by providing base-stabilizing feet stretched out to sides of a self-propelling bogie to be selectively fixed at both positions for use and storage. CONSTITUTION:Base-stabilizing feet 8 are constructed to move to the left and right against a self-propelling bogie to be in contact with the ground, and fixed in a stretched out state to sides of the self-propelling bogie 1 for expanding the ground-contact width on the left and the right. This construction permits to prevent the danger of turnover when a work table 3 is risen to heighten the center of gravity, and especially, even if the self-propelling bogie 1 is parked along a contour line in an orchargd on a slope. When base-stabilizing feet 8 are fixed near the side of the self-propelling bogie, the whole width of the self-propelling bogie 1 containing base-stabilizing feet 8 is reduced, and the bogie 1 can be moved smoothly through trees in the orchard.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a self-propelled work platform, and more particularly to a self-propelled work platform that is equipped with a work platform whose position can be controlled such that it can be lowered and lowered, and is used for management work in orchards and the like.

A series of management tasks in orchards, such as pruning, artificial pollination, flower thinning, bagging, unbagging, and harvesting, must be carried out from low places that can be reached from the ground to places that require ladders. , it is necessary to move widely within the orchard from fruit tree to fruit tree, so conventionally, a self-propelled work trolley that is relatively small and has a small turning radius and a work platform connected to it so that it can be raised and lowered has been used. It is used.

By the way, when such a self-propelled work trolley is used with the work platform folded up, the center of gravity of the machine becomes lower and there is a risk of it tipping over. One possible solution to this problem would be to equip a crane truck with a hydraulically driven fall prevention device, but for small self-propelled work carts such as those used in orchards, However, it is difficult to apply it as it is due to the installation space and drive horsepower, and it is not preferable because the device becomes complicated and the cost increases.

The present invention has been made in consideration of the following circumstances.It has a simple structure, can effectively prevent the risk of falling, and can be stored compactly so as not to interfere with driving when not needed. However, in this retracted state, the present invention provides a self-propelled trolley equipped with an overturn prevention means that also serves as a protection function for the wheels or wheels of the self-propelled trolley and also functions as a full frame. The purpose is to

For this purpose, the present invention provides the above-mentioned self-propelled workbench, in which the body frame of the self-propelled cart is provided with mounting holes extending in the left-right direction, arranged in the front and rear, and which can be freely attached and removed by a predetermined amount. The ground stabilizing frame has an arm that can be inserted and supported freely in and out. fixed to the
In addition, the shape is shaped like an opening in plan view so that it can surround the front, rear, and outer sides of the wheels of the self-propelled trolley or the crawler, and the ground stabilizing frame is extended to the left and right sides of the vehicle body frame to prevent it from overturning. In an inverted installation state, the pupil is in a retracted position close to the vehicle body frame and surrounds the wheel or roller at a predetermined ground clearance.

Hereinafter, the present invention will be specifically explained based on an embodiment shown in the drawings.

In the self-propelled workbench shown in FIGS. 1 and 2, reference numeral 1 denotes a self-propelled workbench, and a workbench 3 is connected above the self-propelled workbench via a telescopic link mechanism 2 so as to be vertically movable.

The self-propelled trolley 1 is equipped with an engine 6, a transmission device 7, etc. arranged on a body frame 5 with a crawler traveling device 4 at the bottom, and the output of the engine 6 is decelerated by a mission device i7 to perform crawling at each gear stage. This configuration is similar to the conventional one. In this embodiment, the self-propelled platform I11 is configured to travel on crawlers, but it is of course possible to configure it to travel on wheels.

Here, on the vehicle body frame 5, the telescopic link mechanism 2
Supports the lower end of (extends in the front-back direction) 1. tj1
A support stand 12 having a pair of guide rails ii and il stretched thereon is arranged. This support stand 12 has two front and rear sides on one side in the left and right direction.
This portion is hinged to the vehicle body frame 5 via a support leg 13, and the center portion of the opposite longitudinal path is supported on the vehicle body frame 5 via a pantograph type jacking device 14. The upper and lower ends of the sitotsuki device f14 are hinged to the support base 12 and the vehicle body frame 5, respectively, so that the support base 12 can be tilted left and right by expanding and contracting in the vertical direction by operating the crank handle 15. There is. Note that the jack device 14 is not limited to the pantograph type, but may be a threaded rod type daruma jack, an electric jack, or a hydraulic jack device.

Next, the telescopic link mechanism 2 has its lower end connected to the guide rails 1j, 11 via the pivot shaft 16 as its constituent members.
A pair of left and right link arms 11.11 are rotatably pivoted at the front ends and partially connected to the connecting plate, and the lower ends are roller-coupled to the guide rail 11.11, and are partially connected to each other as described above. It has a pair of left and right link arms 18.1g that are connected to each other, and these link arms 17.18
intersect in an X-shape when viewed from the side, and the intersecting portions are rotatably connected to each other via a pivot 19. In order to relatively rotate each link arm 17.18 and move the upper end position up and down, a hydraulic cylinder device f20 is installed between both link arms 17.18 via a rod. A workbench 3 is connected to the upper end of each link arm 17, 17, 18, 18 of the telescopic link mechanism 2. That is, a pair of left and right guide rails 22 and 22 extending in the front-rear direction are stretched on the lower surface of the floor plate 21 of the workbench 3, and the upper ends of the link arms 1B and 18 are connected to a pivot shaft 23.
The upper end of the other link arm 17.17 is connected to the guide rail 22.22 by a roller, and by the operation of the telescopic link mechanism 2. The workbench 3 is adapted to be raised and lowered up and down while maintaining a substantially horizontal position.

The work table 3 includes a floor plate 21 wider than the support table 12,
The left and right sides [24,2
4 is rotatably attached, and an operation box 26 having a handle 25 is fixed to a part of the front of the floor plate 21. Note that this operation box 26 is placed at a height that is sufficiently accessible from the ground at the Shimozaki limit of work 3. This operation box 26 includes a hydraulic lever OL, a throttle lever TL, a tension clutch lever CL that also serves as a brake lever, and a pair of hydraulic clutch levers SL on the left, 8 m.
These are connected to the corresponding operating members on the C self-propelled truck 1 side via respective operating cables C, and the expansion and contraction of the hydraulic cylinder device 20 is controlled by operating the Jmeri and hydraulic lever o l-, and the throttle The lever TL controls the rotation speed of the engine 6, and the tension clutch lever CL switches on and off the power transmission from the engine 6 to the transmission device @7, and brakes the crawler traveling device 4 according to the switching state.
In addition to performing a braking release switching operation, the left and right side clutch levers 8L, SL are configured to perform a steering operation of the self-propelled trolley 1.

Further, as shown in FIGS. 3 and 4, support brackets 27 are provided at two locations on the left and right end surfaces of the floor plate 21, respectively.
A shaft 29 is formed on the support bracket 27 to rotatably pivot an engaging member 28, which will be described later, welded to the end of the side plate 24. 24 is configured to be rotatable with respect to the floor plate 21. A stopper mechanism 30 is provided to hold the side plate 24 in an upright position and a horizontal position with respect to the floorboard 21. That is, the engagement member 28, which is fixed to the end of the side plate 24 and pivotally mounted to the shaft 29, has engagement notches 31 and 32 formed at two locations on the circumference with an angular interval of approximately 90 degrees. Ori,
On the other hand, the engagement notch 31 or 32 is provided on the floor plate 21 side.
A locking member 35 having a locking pawl 33 at one end and an operating handle 34 at the other end is pivotally mounted.
This locking member 35 is given the ability to rotate in one direction by a spring bias, and the locking claw 33 has the above-mentioned engagement notch 31.
Alternatively, the state of engagement with 32 is maintained. Note that the engaging member 28 is attached to the side plate 2 with respect to the locking claw 33.
At the upright position of 4, place one engagement notch 31 across the water 1.
is fixed to the side plate 24 in such a manner that the other engaging notch 32 is engaged with the other engaging notch 32 at this position. The stopper mechanisms 30 manufactured as described above are arranged in pairs on the left and right at the front and rear ends of the floorboard 21, and each stopper mechanism 30 disposed in the front (on the other hand, is the locking member 3j) of the floorboard 21. An interlocking structure is achieved by sharing a common pivot shaft 36 for the two. Further, on the outer surfaces of the left and right side plates 24.degree. 24, as shown in FIG. 5, an extension jfi 37 is provided which is supported so as to be slidable outward from the side plates 24 in the underwater position. A holder f-38 with a locking mechanism for the side plate 24 is attached to the distal end of the extension plate 37, so that the extension plate 37 can be held in a stored state where it overlaps with the side plate 24. Note that the extension plate 31 may be stored inside the side plate 24 and pulled out from its upper end surface.

A pulling lever 40 is pivotally attached to the lower end surfaces 39 of the left and right copper plates 24, 24 so as to be rotatable along the lower end surface 39, and a stopper 41 for locking this lever 40 is attached to the ts. and the lever 4o is moved to the stopper 4.
A spring 42 is provided on the 1 side to bias the rotation, and can be rotated to extend the lever 40 outward from the floor plate 21 while the side plate 24 is suspended from the floor plate 21, as shown in FIG. That's how it is.

Although not shown, a stopper member is provided at an appropriate location on the lower end of the side plate 24, which protrudes inward at a substantially right angle and comes into contact with the upper surface of the floor plate 21 when the side plate 24 is in an upright position. 24 is prevented from falling inward at the upright position.

Here, in order to enable the transmission of operating force from the workbench 3 to the self-propelled trolley 1, the telescopic link mechanism 2 has a chain transmission mechanism 4.
3 is provided.

As shown in FIG. 1, a driving sprocket 45 with an operating lever 44 integrally connected to a boss is rotatably attached to a pivot shaft 23 on the side of the idle rail 22, which is stretched over the workbench 3. Operating arms 46, 47 are integrally attached to the boss on the pivot shaft 16 on the side of the guide rail 11, which is stretched over the boss, and these arms 46, 47 are arranged facing each other on the diameter line of the boss, respectively, and project outward. Driven sprocket 48
is attached rotatably, and furthermore, both link arms 16.1
Two intermediate sprockets 49 integrally engaged with each other are rotatably attached to the pivot shaft 19 that cross-connects the two. The driving sprocket 45 and the intermediate sprocket 4 have a constant distance between their axes regardless of the expansion/contraction state of the expansion/contraction link mechanism 2.
9 and between the intermediate sprocket 49 and the driven sprocket 48, transmission chains 50 and 51 are wound. In this case, the transmission chain 50.51 is the operating arm 46.4 on the driven sprocket 48 side when the operating lever 44 on the driving sprocket 45 side is in the upright state.
7 is associated so that the distribution is arranged on both the left and right sides of the link arm 17. In addition, the above transmission chain 50°51
may be a normal type in which each link is connected endlessly, but it is sufficient to have the function of transmitting the rotation of a predetermined device of the drive sprocket 45 to the driven sprocket 48 via the intermediate sprocket 49, so this embodiment In the example, the seventh
Each sprocket 4 as shown! 1, 48. The straight portion that does not mesh with 49 is replaced by a chain, and a link rod 53 whose intermediate portion is connected with a turnbuckle 52 is used.
This allows the tension of the chain to be adjusted. Further, for example, the drive sprocket 45 is connected to the link arm 18 whose axis distance from the intermediate sprocket 49 remains unchanged.
It may be provided above. In this case, the drive sprocket 45
By arranging WI near the pivot 23, the influence of the change in the position of the operating lever 44 due to the expansion/contraction state of the telescoping link mechanism 2 can be substantially ignored. Furthermore, instead of the chain transmission mechanism 43 used in this embodiment, a transmission mechanism may be used for winding the timing belt.
The slip-free winding is to constitute a transmission mechanism.

The chain transmission mechanism 43 having such a configuration is connected to the mission equipment of the self-propelled bogie 1 via a relatively short chain wire.
Connected to 7. That is, as shown in FIG. 7, the inner wires 56 and 57 of the pair of control wires 54 and 55 are connected to the operating arm 46 and 47 ends of the driven sprocket 48.
One end of this inner wire 56.57 is connected.
The other end is connected to both ends of a rotary operation plate 59 attached to the upper end of the rotary speed change shaft 58 of the mission device 7, respectively. A sheath 60.61 that guides the inner wire 56.57 is supported by a stationary member on the support stand 12 side and is disposed opposite the operating arm 46.47 at a predetermined distance from the bracket 62. One end is connected and fixed, and the other end is connected and fixed to a wire bracket 64 that is attached to the transmission case 63 and is disposed opposite to the rotary operation plate 59 at a predetermined interval.

Therefore, /r i 1 of the body frame 5 of the self-propelled trolley 1
is equipped with grounding frames 8, 8 for fall prevention on the 1st floor. The ground stabilizing frame 8 has a main body 8a formed in a substantially U-shape that is vertically elongated in a plan view and surrounds the front, rear, and outer sides of the crawler 9 of the crawler traveling implement wI4, and also has a main body 8a that is vertically elongated in a plan view and that surrounds the front, rear, and outer sides of the crawler 9 of the crawler traveling implement wI4. It has a pair of support arms 10.10. This support arm 10.10 stands upward at a predetermined height from its base end fixed to the ground stabilizing frame main body 8a by means such as welding, and bends there so that the tip end becomes substantially horizontal toward the intermediate frame 5 side. In order to attach the tip of the holding arm 10.10, the vehicle body frame 5 is provided with a pair of front and rear mounting holes 70.70 that pass in the left and right direction; They are arranged on both left and right sides of the vehicle body frame 5 corresponding to the ground stabilizing frames 8, 8, respectively. Then, insert the tip of the support arm 10.10 into this mounting hole 70.70,
By fixing with bolts, the ground stabilizing frame 8 can be attached to the vehicle body frame 5 in the left-right direction, and can maintain a predetermined level on the ground when the frame is installed upside down in the vertical direction.

To explain how the self-propelled work mortar type configured as shown below is used, for example, along with harvesting work in an orchard, first, when harvesting fruit at a relatively low ground clearance, the work table 3 side The hydraulic cylinder device 20 is contracted by operating the hydraulic lever OL disposed in the operation box 26. As a result, both link arms 17 and 18 of the telescopic link mechanism 2 rotate relative to each other about the pivot shaft 19jI, lowering their upper ends, and lowering the guide rail 22 integrated with the workbench 3, so that the workbench 3 becomes a support stand. It will be lowered to just above 11. Therefore, the harvesting work is performed on the floor plate 21 of the workbench 3.

Next, there is a method for harvesting fruits that are located at a high height above the ground and cannot be harvested from the workbench 3 on the ground or in a lowered position. :Contrary to the above, the hydraulic cylinder device @20 is extended by operating the hydraulic lever OL. This allows the telescopic link mechanism 2
extends and causes the workbench 3 to hit F. When the workbench 3 reaches a predetermined height position, the extension operation of the hydraulic cylinder device 20 is stopped by operating the hydraulic lever 0[- to maintain the workbench 3 at a predetermined height above the ground. Harvesting work on the workbench 3 is almost the same as described above, but as the workbench 3 rises, the φ center position becomes higher, so if you want to perform the harvesting work in such a state, please check the ground stability on the left and right sides in advance. frame 8,
8 are extended to the left and right outside of the self-propelled trolley 1. At this time, the ground stabilizing frames 8, 8 are attached to the attachment holes 70 of the vehicle body frame 5 with their support arms 10 facing upward. By doing so, the left and right ground contact widths and the front ground contact width of the self-propelled trolley 1 are expanded, and when the work platform 3 is placed at its upper limit, it can be stably supported.

When working at heights using such a ground stabilizing frame 8, it is also possible to pull out the extension plate 37 from the side plate 24 and work on it as shown in FIG.
Fruits located further away can be easily harvested.

When moving the self-propelled work trolley to another fruit tree to be harvested, first turn the ground stabilizing frame 8 upside down and move the vehicle body with the support arm 10 facing downward. It is inserted into the mounting hole 70 of the frame 5 and placed in a storage position close to the vehicle body frame 5 side. By doing this, the ground stabilizing frame main body 8a has a predetermined ground clearance and surrounds the front, rear and outer sides of 1-59, so it does not become a hindrance to running, and also protects the crawler 9. It is also possible to prevent the worker from coming into contact with 9. After such preliminary preparations, the self-propelled platform 1i1 is operated by operating the operation box 26 and the operation lever 44 on the workbench 3 side. First, operate the tension clutch lever 〇L to cut off the power transmission from the engine 116 to the transmission device M7, and apply braking to the rear wheel travel device 4. In this state, swing the operating lever 44. Manipulate. The swinging motion of the operating lever 44 is transmitted to the driven sprocket 4 via the drive sprocket 45, the transmission chain 50, the intermediate sprocket 49, and the transmission chain 51, regardless of the expansion/contraction state of the telescoping link mechanism 2.
8, the operating arms 46 and 47 thereof are rotated. This operating arm 46, 47 is connected to the rotary operating plate 59 of the mission device H1 by a pair of control wires 54, 55, so that the swinging movement of the operating lever 44 in one direction is directed to the rotating operating plate 59. Furthermore, the swinging motion of the operating lever 44 in the other direction is similarly transmitted as a rotating motion of the rotary operating plate 59 in the other direction. Since the rotation operation plate 59 is rotated according to the amount of rotation operation of the rotation lever 44, the operation lever 44
4, the rotary speed change shaft 58 of the microphone device 17 is operated to change the speed as appropriate. Therefore, after switching to a predetermined gear stage using the operating lever 44, the tension clutch lever CI- is operated to release the brake on the crawler traveling gear M4 and connect power transmission from the engine 6 to the transmission device 7. . This drives the crawler traveling device 4 of the self-propelled truck 1, so the left and right side clutch levers 8L.

The self-propelled trolley 1 can freely travel within the orchard by steering the vehicle using the SL.

Since the operation box 26 is arranged at the front end of the workbench 3, it can be operated from the ground when the workbench 3 is in the lowered position, and the self-propelled cart 1 can be operated while walking on the ground. You can also do this.

As explained above, according to the present invention, the ground stabilizing frame can move toward and away from the vehicle body frame in the left and right directions, and the ground stabilizing frame main body is located at the front, rear, and outside of the middle wheels or crawlers constituting the traveling device. Since it has a planar shape that can surround both sides, it is possible to expand the ground contact area of the self-propelled work trolley in the front, rear, left and right sides with the simple task of attaching the ground stabilizing frame to the left and right sides of the self-propelled work trolley. Therefore, the risk of falling can be effectively prevented even when the workbench is elevated and the center of gravity is high. Not only that, the ground stabilizing frame body is bent from the tip of the support arm and fixed to the base end extending downward, so the ground stabilizing frame can be inverted 4 times downwards and approached the vehicle frame. By attaching it to the ground, the ground-fixed frame body surrounds the wheels or crawler with a predetermined ground clearance, and it is possible to store the wheel or crawler in a secure state that does not interfere with driving. It also has a protective function and can also function as a safety frame that prevents workers from coming into contact with wheels and the like. Moreover, since the structure is extremely simple and does not require any hydraulic equipment, it has the advantage of being adaptable to relatively small, low horsepower, self-propelled workbench types used in orchards, etc. can get.

[Brief explanation of the drawing]

Fig. 1 is an overall side view of a self-propelled workbench according to an embodiment of the present invention, Fig. 2 is a front view of the self-propelled workbench, Fig. 3 is a front view showing the structure of the installation of the G-plate to the floor plate; Figure 4 is a plan view of the essential parts, Figures 5 and 6 are explanatory diagrams showing the rotational position of the lateral roots, and Figure 7 is a schematic overall diagram showing the linkage configuration from the operating lever to the transmission shaft of the transmission device. FIG. 1... Self-propelled platform, 2... Telescopic link mechanism, 3...
Hakurakudai, 4... Ri-O-Ra traveling device, 5... Frame, 6... Engine, 7... Mission device, 8...
・Stable frame, 8a... Ground stability frame body, 1
2... Support stand, 14... Jacking device, 17.18
...Link arm, 20...Hydraulic cylinder device, 2
DESCRIPTION OF SYMBOLS 1... Floor board, 24... Side plate, 26... Operation box, 28... Retention member, 30... Stopper mechanism, 3
5... Locking member, 31... Extension plate, 40... Pulling lever, 43... Chain transmission mechanism, 44... Operation lever, 45... Drive sprocket, 46.47.
・・Operation arm, 48・・Driven sprocket, 49・
... Intermediate sprocket, 50.51 ... Transmission chain, 52 ... Turnbuckle, 53 ... Link rod, 54.55 ... Control wire, 56.57.
...Inner wire, 58...Rotary type gear shift shaft, 59
...Rotating operation plate, 70...Mounting hole. Procedural amendment (spontaneous) November 29, 1980 Commissioner of the Patent Office Wakasugi Tuguchi 1, Indication of the case 1981 Patent Application No. 170582 2, Name of invention Self-propelled work trolley = 3. Relationship with the case of the person making the amendment Patent applicant 224-14, Naganuma-cho, Isesaki, Gunma Prefecture, Full text of the agent's specification 6, Contents of the amendment as shown in the attached sheet (amended) specification 1, Name of the invention Self-propelled type Work Dolly 2, Claims A self-propelled work dolly that supports a workbench on the self-propelled dolly via a telescoping link mechanism so that it can be moved up and down. and a storage position closer to the self-propelled dolly than the use position. 3. DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a self-propelled work platform, and particularly relates to a self-propelled work platform that is equipped with a work platform whose position is controlled such that it can be raised and lowered, and is used for management work in orchards and the like. A series of management tasks in orchards, such as pruning, artificial pollination, flower thinning, bagging, unbagging, and harvesting, must be carried out from low places that can be reached from the ground to high places that require a ladder. Since it is necessary to move widely within the orchard from fruit tree to fruit tree, conventionally a self-propelled work trolley is used, which is a relatively small and maneuverable self-propelled trolley with a work platform connected to it so that it can be raised and lowered. has been done. By the way, when such a self-propelled work platform is used with the work platform raised, the center of gravity of the vehicle becomes high and there is a risk of tipping over. Therefore, it is desirable that self-propelled carts be equipped with measures to prevent them from falling over. It is also desired that the self-propelled cart be able to sufficiently prevent it from falling even if it is stopped along the contour line in a 1M garden on a sloping land. The present invention was made in consideration of the above circumstances, and can effectively prevent the risk of falling even when working in an orchard on a slope, and can be stored compactly so as not to interfere with driving when not needed. To provide a self-propelled trolley equipped with anti-overturning means. For this purpose, the present invention provides a self-propelled work cart as described above, in which the self-propelled cart has a use position that extends to the side, and a storage position that is closer to the self-propelled work cart than this use position. The present invention will be explained in detail based on an embodiment shown in the drawings. Fig. 1 and Fig. 2 In the self-propelled work cart shown in the figure (numeral 1 is a self-propelled cart, a work platform 3 is connected above it via a telescopic link mechanism 2 so as to be able to rise and fall freely up and down. The self-propelled cart 1 runs on a crawler. An engine 6, a transmission device 7, etc. are disposed on a vehicle body frame 5 having a device 4 at the bottom, and the output of the engine 6 is decelerated by the mission device 7 to provide crawler running at each gear (J is in charge). This configuration is the same as that of the conventional Lano.Although in this embodiment, the self-propelled trolley 1 is configured to run on crawlers, it may also be configured to run on wheels. Of course, the telescopic link mechanism 2 is mounted on the heavy frame 5.
A support stand 12 is disposed on which a pair of left and right guide rails 11.11 extending in the front-rear direction are stretched to support the lower end of the support base 12. The support stand 12 is hinged on one side in the left-right direction, and the substantially central portion in the front-rear direction on the opposite side is supported on the vehicle body frame 5 via a pantograph type jacking device 14. The jacking device 14 has its upper and lower ends hinged to the support base 12 and the vehicle body frame 5, respectively, so that when the crank handle 15 is operated to expand and contract in the vertical direction, the support base 12 can be tilted left and right. There is. Note that the jacking device W14 is not limited to the pantograph type, but may be a threaded rod type jack, an electric jack, or a hydraulic jack. Next, the telescopic link mechanism 2 has a pair of left and right components whose lower ends are rotatably attached to the front ends of the guide rails 11, 11 via a pivot 1G, and which are partially connected by a connecting plate. link arms 11.17, and a pair of left and right link arms 1 whose lower ends are roller-coupled to the guide rail 11.11 and which are partially connected to each other in the same manner as above.
8.18, these link arms 17.18 intersect in an x-shape when viewed from the side, and the intersecting portions are rotatably connected to each other via a pivot shaft 19. In order to rotate each link arm 17, 18 relative to each other and move the upper end position of the link arm 17, 18 up and down, each of the telescopic link mechanisms 2 is mounted between the two link arms 17, 18 with a hydraulic cylinder device via a rod. Link arm 17.17.
A workbench 3 is connected to the upper ends of 18, 18. That is, a pair of left and right guide rails 22.22 extending in the front-back direction are stretched on the lower surface of the floor plate 21 of the workbench 3, and the upper end of the link arm 18.18 is attached to the guide rails via a pivot 23. 22.220 is pivotally connected to the front end, and the upper end of the other link arm 17.17 is connected to the guide rail 2.
2 and 22, and by the operation of the telescopic link mechanism 2, the workbench 3 can be raised and lowered up and down while maintaining a substantially horizontal position. The work table 3 includes a floor plate 21 wider than the support table 12,
Left and right side panels 24.2 that also serve as overhanging floors at the left and right ends
4 is rotatably attached, and an operation box 26 having a handle 25 is fixed to the front end of the floor plate 21. Note that this operation box 26 is arranged at a height that is sufficiently accessible from the ground at the lowering limit of the workbench 3. This operation box 26 includes a hydraulic lever OL, a throttle lever TL, a tension clutch lever L that also serves as a brake lever, and a pair of left and right side clutch levers 81. SL
are provided, and these are each connected to the corresponding operation member on the self-propelled trolley 1 side via each operation cable C,
The expansion and contraction of the hydraulic cylinder device 20 is controlled by operating the hydraulic lever OL, the rotation speed of the engine 6 is controlled by the throttle lever TL, and the power transmission from the engine 6 to the transmission device 7 is switched on and off by the tension clutch lever CL. According to the switching state, the crawler traveling device i4 is switched between braking and braking release, and the left and right side clutch levers 8L and SL are used to steer the self-propelled truck 1. In addition, support brackets 21 are provided on both the left and right end surfaces of the floor plate 21 at two locations, front and rear, respectively, as shown in the eaves of FIGS. 3 and 4.
A shaft 29 is formed on the supporting bracket 27 to rotatably pivot an engaging member 28, which will be described later, welded to the end of the side plate 24. 24 is configured to be rotatable with respect to the floor plate 21. A stopper mechanism 30 is provided to hold the side plate 24 in an upright position and a horizontal position with respect to the floorboard 21. That is, the engagement member 28, which is fixed to the end of the side plate 24 and pivotally mounted to the shaft 29, has engagement notches 31 and 32 formed at two locations on the circumference with an angular interval of approximately 90 degrees. Ori,
On the other hand, the engagement notch 31 or 32 is provided on the floor plate 21 side.
A locking member 35 having a locking pawl 33 at one end and an operating handle 34 at the other end is pivotally mounted.
This latch 11 member 35 is given the ability to rotate in one direction by spring bias, and the above-mentioned engagement notch 3 of the latch pawl 33
1 or 32 is maintained. The engagement member 28 is fixed to the side plate 24 in such a manner that one engagement notch 31 of the side plate 24 is engaged with the locking pawl 33 in the upright position, and the other engagement notch 32 is engaged with the engagement claw 33 in the horizontal position. be done. In the stopper mechanism 30 constructed as described above, each stopper mechanism 3o disposed behind the front end of the floorboard 21 is configured to be interlocked by sharing the pivot shaft 36 of the locking member 35 with respect to the floorboard 21. There is. Further, on the outer surfaces of the left and right side plates 24°24, a fifth
As shown in the figure, an extension plate 37 is provided at a horizontal position of the side plate 24 so as to be slidable outward from the side plate 24. A handle 38 with a locking mechanism attached to the side plate 24 is attached to the distal end of the extension plate 31, so that the extension plate 31 can be held in a stored state where it overlaps with the side plate 24. Note that the extension plate 37 may be stored inside the side plate 24 and pulled out from its upper end surface. A lifting lever 40 is pivotally attached to the lower end surfaces 39 of the left and right side plates 24, 24 so as to be rotatable along the lower end surfaces 39, and a stopper 41 for locking the lever 4o is welded. , and the lever 4o is moved to the stopper 41
A spring 42 is provided for biasing the side plate 24 to rotate so that the lever 40 can be rotated to extend outward from the floor plate 21 when the side plate 24 is suspended from the floor plate 21, as shown in FIG. It's Nishide. Although not shown, a stopper member is provided at an appropriate location on the lower end of the side plate 24, which protrudes inward at a substantially right angle and comes into contact with the surface of the floor plate 211 when the side plate 24 is in an upright position. In the upright position of 24, it is prevented from falling inward. Here, in order to enable the transmission of operating force from the workbench 3 to the self-propelled trolley 1, the telescopic link mechanism 2 has a chain transmission mechanism 4.
3 is provided. As shown in FIG. 1, a drive sprocket 45 with an operating lever 44 integrally connected to a boss is rotatably attached to the pivot shaft 23 on the side of the guide rail 22 stretched over the workbench 3. Operating arms 46 and 47 are integrally attached to the boss on the pivot shaft 1B on the side of the guide rail 11 which is stretched over the guide rail 11, and these two arms 46 and 47 are arranged opposite to each other on the diameter line of the boss and project outward. Driven sprocket 48
Rotatably attach the link arms 16.1 and 16.1.
Two sets of intermediate sprockets 49 integrally connected to the pivot shaft 19 that cross-connects the rotary shafts 8 are attached to the rotary automatic r[. Transmission chains 50 and 51 are connected between the driving sprocket 45 and the intermediate sprocket 49, and between the intermediate sprocket 49 and the driven sprocket 48, whose center distance remains unchanged regardless of the expansion/contraction state of the telescopic link mechanism 2. It is rolled. At this time, the transmission chain 50.51 is operated by the operating lever 46.5 on the driven sprocket 48 side when the operating lever 44 on the drive sprocket 45 side is in the upright position.
47 is an association so that distribution portions are arranged on both the left and right sides of the link arm 17. In addition, the above transmission chain 50゜5
1 may be a normal one in which each link is connected endlessly, but it is sufficient to have the function of transmitting the rotation of the drive sprocket 45 at a predetermined angle to the driven sprocket 48 via the intermediate sprocket 49, In this embodiment, as shown in FIG. 7, the straight portions that do not mesh with the sprockets 45, 48, and 49 are replaced by chains, and are replaced by link rods 53 whose intermediate portions are connected by turnbuckles 52. This allows for tension adjustment. Further, for example, the drive sprocket 45 may be provided on the link arm 18 whose center-to-axis distance from the intermediate sprocket 49 remains unchanged. In this case, by arranging the drive sprocket 45 near the pivot 23, the telescopic link mechanism 2
The effect of a change in the position of the operating lever 44 due to the expanded/contracted state of the lever can be substantially ignored. Further, instead of the chain transmission mechanism 43 used in this embodiment, a transmission mechanism may be used for winding the timing belt. The chain transmission mechanism 43 having such a configuration is connected to the mission device 1 of the self-propelled truck 1 via a relatively short control wire.That is, as shown in FIG. has a pair of control wires 54.55 and inner wires 56.5.
7 is connected, and this inner wire 56.5
7 The other end is the 0-tally type gear shift shaft 58 of the mission device f7
These are respectively connected to both ends of a rotary operation plate 59 attached to the upper end of the rotary operation plate 59. The sheath 60.61 that guides the inner wire 56.57 is supported by a stationary member on the support stand 12 side and is attached to the operating arm 46.47 for a predetermined time tIIm.
One end thereof is connected and fixed to a wire bracket 62 which is arranged opposite to each other with a predetermined interval therebetween, and is connected and fixed to a wire bracket 64 which is arranged to face the rotating operation plate 59 at a predetermined interval. Thus, the left and right sides of the body frame 5 of the self-propelled trolley 1 are equipped with ground stabilizing legs 8, 8 for preventing overturning. This ground stabilizing leg 8 has a ground contact portion 8a that is connected to the crawler traveling gear [
It is formed in a substantially U-shape that is vertically elongated in plan view and surrounds the front, rear, and outer sides of the crawler 9 of No. 4, and has a pair of front and rear support portions 10.10 for attachment to the vehicle body frame 5. These support parts 10, 10 are the ground contact parts 8a of the above-mentioned ground stabilizing legs.
The support part 10.10 rises upward at a predetermined height from the base end fixed by means such as welding to the support part 10. For mounting, the vehicle body frame 5 is provided with a pair of front and rear mounting holes 70, 70 passing in the left and right direction,
These are arranged on both left and right sides of the vehicle body frame 5, corresponding to the left and right ground stabilizing legs 8.8. By inserting the tips of the support parts io and io into the mounting holes 70 and 70, the ground contact parts 8 of the ground stabilizing legs 8 can be moved toward and away from the aμφ body frame 5 in the left-right direction.
0 is vertically reversed, a predetermined ground clearance is maintained, and by fixing the supporting part 10 with bolts, the ground stabilizing leg 8 is integrated into the vehicle body frame 5. It has become. To explain how the self-propelled work cart configured as described in 1- below is used, for example, along with harvesting work in an orchard, first, when harvesting fruit at a relatively low ground clearance, the work platform 3 side is used. Hydraulic lever OL placed in the operation box 26 of
The hydraulic cylinder system @20 is contracted by the operation. As a result, both link arms 17 and 18 of the telescopic link mechanism 2 are rotated relative to each other around the pivot shaft 19, lowering the position of their upper ends, and
Since the guide rail 22 integrated with the workbench 3 is lowered, the workbench 3 is lowered to just above the support stand 11. There, workbench 3
Harvesting work is done on the 21 soil floorboards. Next, when harvesting fruits that are high above the ground and cannot be harvested from the workbench 3 on the ground or in a lowered position,
Contrary to the above, the hydraulic cylinder device F20 is extended by operating the hydraulic lever OL. This causes the telescopic link mechanism 2 to extend and raise the workbench 3. Therefore, workbench 3
When the workbench 3 reaches a predetermined height position, the extension operation of the hydraulic cylinder device 20 is stopped by operating the hydraulic lever OL, and the workbench 3
The purpose of this is to maintain the vehicle at a predetermined height above the ground. Harvesting work on the workbench 3 is almost the same as described above2, but as the workbench 3 rises, the center of gravity becomes higher, so if you want to perform the harvesting work in such a condition, make sure to ground the left and right sides in advance. Stabilizing legs 8.8 are extended to the left and right outside of the self-propelled trolley 1. At this time, the ground stabilizing leg 8.8 is attached to the attachment hole 70 of the vehicle body frame 5 with its support portion 10 facing upward. By doing so, the horizontal ground contact width and the front and rear ground contact width of the self-propelled trolley 1 are expanded, and even when the work platform 3 is placed at its upper limit, it can be stably supported. When working at high places using such ground stabilizing legs 8, it is also possible to pull out the extension plate 37 from the side plate 24 and work on it as shown in FIG. By doing this, it is possible to easily harvest even the beam length located at the center of the fruit tree that is further away from the self-propelled cart 1. Here, when moving the self-propelled work trolley to another fruit tree to be harvested, first, the ground stabilizing legs 8 are reversed in the vertical direction, and the supporting parts 10 are placed on the lower side. 5 into the mounting hole 70 of Φ body frame 5.
Keep it in a storage position close to the side. By doing this, the ground contact portion 8a of the ground stabilizing leg 8 surrounds the front, rear, and outer sides of the crawler 9 with a predetermined ground clearance, so that it does not become an obstacle to running and also protects the crawler 9. At the same time, it is also possible to prevent the worker from coming into contact with the crawler 9. After such preliminary preparations, operate the operation box 26 and the operation lever 44 on the workbench 3 side to start the self-propelled trolley 1.
driving. First, the tension clutch lever CL is operated to cut off power transmission from the engine 6 to the transmission device 1, and the crawler traveling device 4 is braked, and in this state, the operating lever 44 is operated to swing. This swinging motion of the operating lever 44 is independent of the expansion/contraction state of the telescoping link mechanism 2.
0 is transmitted to the intermediate throttle 48, which causes its operating arm 46°41 to rotate. This operating arm 46.4
7 is connected to the rotating operation plate 59 of the mission al17 by a pair of control wires r54.55, so
The swinging movement of the operating lever 44 in one direction is controlled by the rotating operating plate 59.
The swinging motion of the operating lever 44 in the other direction is similarly transmitted as a rotating motion of the rotary operating plate 59 in the other direction. Since the rotary operation plate 59 is rotated in accordance with the amount of rocking operation of the rocking lever 44, the rotary type transmission shaft 58 of the transmission device @7 is appropriately operated by the operation lever 44. Therefore,
After switching to a predetermined gear stage using the operating lever 44, the tension clutch lever CL is operated to release the brake on the crawler traveling device 4 and connect power transmission from the engine 6 to the transmission device 7. Since the crawler traveling device 4 of the self-propelled trolley 1 is thereby driven, the self-propelled trolley 1 can freely travel within the orchard by steering the left and right side clutch levers 8L and SL. Since the operation box 26 is arranged at the front end of the workbench 3, it can be operated from the ground when the workbench 3 is in the lowered position, and the self-propelled platform 1 can be operated while walking on the ground. You can also do that. As explained above, according to the present invention, the ground stabilizing legs can move toward and away from the self-propelled vehicle in the left and right directions.
By fixing the ground stabilizing legs in a state that extends to the sides of the self-propelled work vehicle, the left and right ground contact portions of the self-propelled work vehicle can be expanded. Therefore, the risk of falling can be effectively prevented even when the work platform is raised and the center of gravity is high.In particular, even when the self-propelled work platform is parked along the contour line in an orchard on a slope, the risk of falling can be effectively prevented. It can prevent falls. Furthermore, by fixing the ground stabilizing legs close to the self-propelled cart, the overall width of the self-propelled work cart including the ground stabilizing legs can be reduced, making it easier to move through the orchard through the trees. The effect is that it can be performed smoothly. 4. Brief explanation of the drawings Fig. 1 is an overall side view of a self-propelled work trolley according to an embodiment of the present invention, Fig. 2 is a front view of the same, and Fig. 3 shows the structure of the mounting of the plate to the floor plate. Figure 4 is a plan view of the main parts, Figures 5 and 6 are explanatory diagrams showing the rotational position of the side plate, and Figure 7 is a linkage configuration from the operating lever to the transmission shaft of the transmission device. It is a schematic whole perspective view showing. 1... Self-propelled trolley, 2... Telescopic link mechanism, 3...
Workbench, 4...Crawler traveling equipment, 5...Vehicle frame, 6...Engine, 1...Mission device, 8
... Ground stabilizing leg, 8a... Grounding part made of ground stabilizing material, 10
... Support part, 12 ... Support stand, 14 ... Jacking device, 17.18 ... Link arm, 20 ... Hydraulic cylinder device, 21 ... Floor plate, 24 ... Side plate, 26
...Operation box, 28... Collaring member, 3o...
Stopper mechanism, 35... Locking member, 31... Extension plate, 40... Pulling lever, 43... Chain transmission mechanism, 44... Operation, lever, 45... Drive sprocket, 46 .47... Operating arm, 48... Driven sprocket, 49... Intermediate sprocket, 50°51
...Transmission chain, 52...Turnbuckle, 53
... Link arm, 54.55 ... Control wire, 56゜57 ... Inno wire, 58 ... Rotary type speed change shaft, 59 ... FBI operation panel, 10 ...
Mounting hole. Patent applicant: Nozawa Seisakusho Co., Ltd. Attorney
Nobu Kobashi Jundo Patent Attorney Susumu Murai

Claims (1)

[Claims] Will install a workbench on a self-propelled trolley via a telescopic link mechanism
In the self-propelled workbench that can be supported, the body frame of the self-propelled trolley is provided with a mounting hole passing in the left-right direction after the Wr, and the workbench is supported by being inserted into and detached from the mounting hole and freely inserted and removed by a predetermined amount. A ground stabilizing frame having a support arm is provided, and the main body of the ground stabilizing frame is formed into a shape in plan view that can surround the front and rear and outer sides of the wheels or crawlers in the self-propelled platform, and the above-mentioned mounting It is fixed to the base end of the support arm that is bent from the tip of the support arm that is inserted through the hole and extends downward, and when the ground stabilization frame is installed upside down in the vertical direction, the support arm can be fixed to the base end of the support arm with a predetermined ground clearance. A self-propelled work trolley characterized by being configured so that it can be stored in a surrounding state.