JP2011062153A - Under-trellis electric working vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an under-trellis electric working vehicle to prevent wrong operation of a switch and improve durability of the switch. <P>SOLUTION: The under-trellis electric working vehicle is provided with a base 10 holding a seat 11 having adjustable height and a floor 12, a pair of traveling drive mechanisms 20A, 20B placed at right and left of the front part of the base 10 and independently driven with electric motors rotatable in normal and reverse directions, and a rear wheel 40 placed behind the lateral center of the base 10 and rotating by the traveling motion with the traveling drive mechanisms 20A, 20B. A pair of switch operation parts 30A, 30B placed on an upper face of the floor 12 are provided with push buttons 31 for normal rotation, push buttons 32 for reverse rotation and protrusions 33 placed between the buttons. Each of the pair of the traveling drive mechanisms 20A, 20B is operable by ON/OFF operation of the switches by stepping with foot. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an under-shelf electric work vehicle that is used to work on an upper object while an operator is sitting on a seat under the shelf.

In the shelf cultivation of crops such as buttoya, it is necessary to perform various operations such as batter cutting, grain collection, bag hanging, shade hanging, and harvesting for the crop that is the upper target.
These operations are generally standing operations performed by an operator looking up and raising his arms. Therefore, the burden placed on the workers is large and heavy labor is required. Moreover, it is impossible to adjust the height of the shelf to all workers, and the height at which the crops bear fruit is not constant. For this reason, the worker changes his / her posture or uses a platform depending on the height of the crop. This is also a factor that reduces work efficiency, and places a heavy burden on the worker.

On the other hand, it is an under-shelve work vehicle used for under-shelve work in which arms are raised above the shoulder, such as grape graining work, and among the three wheels that support the base of the under-shelve work vehicle Two drive wheels that can be independently driven mounted across the base, an electric motor that is independently provided on the base and drives each of the drive wheels, and a chair that is mounted on the base There has been proposed an under-shelve work vehicle that is provided so as to be operable by a foot of an operator who sits on the vehicle and includes a drive switch that individually drives each of the electric motors (see Patent Document 1).
In this under-shelve work vehicle, each drive switch is a forward / reverse rotation changeover switch, and an operation is performed by stepping on an extension portion extending in two directions.

JP 07-298750 A (first page)

The problem to be solved with respect to the under-shelf electric work vehicle is that in the above-mentioned prior art, as each drive switch, the extension part extending in two directions from the changeover switch is operated by foot, but a delicate touch is required. This is likely to cause erroneous operations. In addition, since it is a device that steps on with a foot, it is difficult to improve durability with a forward / reverse rotation changeover switch.
SUMMARY OF THE INVENTION An object of the present invention is to provide an under-shelf electric work vehicle that can prevent erroneous operation of a switch and can improve the durability of the switch.

In order to achieve the above object, the present invention comprises the following arrangement.
According to one form of the under-shelf electric work vehicle according to the present invention, the under-shelf electric work vehicle is used for working on an upper object in a state where an operator is sitting on the seat under the shelf, A base on which the seat and the floor portion, which can be adjusted in position, are placed, and an electric motor which is arranged on the front side and the left and right of the base and can be rotated in both forward and reverse directions. A pair of travel drive mechanisms driven on the rear side of the base and disposed in a central portion in the left-right direction, and driven rearwardly by the pair of travel drive mechanisms. The pair of switch operating portions provided on the upper surface of the floor portion are operated as pushbuttons for forward rotation so that each of the pair of travel drive mechanisms is operated by turning on and off the switch by stepping on the foot. , Reverse push button, and front Having a protrusion both pushbuttons are provided in an intermediate portion disposed.

Moreover, according to one form of the under-shelf electric work vehicle according to the present invention, the traveling drive mechanism may be configured with an endless track that is operated by a driving force of the electric motor as a component.
Moreover, according to one form of the under-shelf electric work vehicle according to the present invention, the traveling drive mechanism can include a wheel that is rotated by a driving force of an electric motor as a constituent element.

  Further, according to one embodiment of the under-shelf electric work vehicle according to the present invention, the seat is supported by a shape memory alloy and a headrest is provided so that the height can be adjusted.

  Moreover, according to one form of the under-shelf electric work vehicle according to the present invention, an arm support is provided on the seat so as to be supported by a shape memory alloy and to be adjustable in height.

  According to the under-shelf electric work vehicle of the present invention, it is possible to prevent a switch from being erroneously operated and to obtain a particularly advantageous effect that the durability of the switch can be improved.

It is a side view which shows the example of a form of the under-shelf electric work vehicle which concerns on this invention. It is a top view of the example of a form of FIG. It is a front view of the example of a form of FIG. It is a rear view of the example of a form of FIG.

Hereinafter, the form example which concerns on the under-shelf electric work vehicle of this invention is demonstrated in detail with an accompanying drawing (FIGS. 1-4).
This under-shelf electric work vehicle is used to work on an upper object while an operator is sitting on the seat 11 under the shelf.

Reference numeral 10 denotes a base on which a seat 11 and a floor portion 12 provided so that the height position can be adjusted are placed.
The seat 11 is mounted on the seat base portion 11a so that the seat body 11b can be adjusted in the front-rear direction. In this embodiment, through holes are appropriately provided on both sides of the seat base portion 11a and the seat body 11b, and the seat base portion 11a and the seat body 11b are mounted so that the position in the front-rear direction can be adjusted by fastening with bolts and nuts.

Reference numeral 13 denotes a telescopic support, the upper end of which is fixed to the lower surface of the seat base portion 11a, and the lower end of which is fixed to the upper surface of the base 10, and supports the seat 11. The telescopic support column 13 of this embodiment is a gas spring, and the rod 13b can be moved up and down by operating the operation lever 13a, and the height of the seat 11 can be adjusted within the range of the stroke.
In addition, 14 is a guide mechanism, the upper end is being fixed to the lower surface of the seat base part 11a, and the lower end is being fixed to the upper surface of the base 10 so that rotation of the seat 11 may be prevented. A rod-shaped portion 14 b is fitted to the pipe-shaped portion 14 a so as to be able to enter and exit in the vertical direction, and can be expanded and contracted with the operation of the telescopic support column 13.

The floor portion 12 is supported and fixed by a front fixing portion 16 fixed to the front standing frame portion 15 and a rear fixing portion 17 standing on the intermediate portion of the base 10 so that the height can be adjusted. ing.
In this embodiment, a plurality of engaging portions (through holes) arranged in the vertical direction are provided on both the front fixing portion 16 and the rear fixing portion 17, and bolts and nuts are used to connect the floor portion 12 to the front fixing portion 16. By fixing the front end portion and fastening the rear end portion of the floor portion 12 to the rear fixing portion 17, the floor portion 12 is mounted so that the position in the vertical direction can be adjusted.

20A is a left endless track traveling device, and 20B is a left endless track traveling device. The left endless track traveling device is disposed on the front side and the left and right sides of the base 10 and is independently driven by an electric motor that can rotate in both forward and reverse directions. A pair of travel drive mechanisms that are driven in this manner. In the present embodiment, each is driven by driving device portions 21 and 21 each having an electric motor and a speed reduction mechanism.
If the pair of endless track traveling devices 20A and 20B are rotated in the same direction, they can go straight, and if they are rotated in the opposite direction, they can turn on the spot. Moreover, according to this pair of endless track traveling apparatuses 20A and 20B, it is a front wheel drive system, and it can drive | work suitably also in a place with many undulations.

As shown in FIG. 1, each of the pair of endless track traveling devices 20A and 20B in the present embodiment is a small endless track having a triangular side shape.
Reference numeral 22 denotes a starter wheel, which is rotated by directly transmitting the power of the electric motor of the drive unit 21. Reference numeral 23 denotes a wheel, and a pair is arranged on the lower side of the starting wheel 22 and rotates in a driven manner. Reference numeral 25 denotes a track belt, which is wound around the starting wheel 22 and the pair of rolling wheels 23. Reference numeral 26 denotes a battery, which is a power source for the pair of drive units 21 and 21 (electric motor).
According to this, since the area in contact with the ground is widened by the track belt 25, the vehicle can travel suitably without sinking even on the soft ground.

Reference numeral 40 denotes a rear wheel, which is disposed on the rear side of the base 10 and in the central portion in the left-right direction, and is driven and operated in accordance with traveling by the pair of traveling drive mechanisms (infinite track traveling devices 20A and 20B).
Reference numeral 41 denotes a caster-type wheel mounting portion, which is configured so that the direction of the rear wheel 40 can be appropriately changed in accordance with the operation by the endless track traveling devices 20A and 20B.

30A is a left switch operation section, and 30B is a right switch operation section. The switch is turned on and off by stepping on the foot corresponding to each of the pair of travel drive mechanisms (infinite track travel apparatuses 20A and 20B). It is provided on the upper surface of the floor 12 so as to be operated.
According to this, since it is the foot-operated switch operation units 30A and 30B, it becomes hands-free and the work efficiency under the shelf can be improved.

And each of this pair of switch operation part 30A, 30B is the protrusion provided in the intermediate part in which the push button 31 for forward rotation, the push button 32 for reverse rotation, and both the push buttons 31 and 32 are arrange | positioned. Part 33.
As shown in FIG. 2, the push buttons 31, 32 and the protrusion 33 of the pair of switch operation portions 30A, 30B are arranged at symmetrical positions so that the push buttons 31, 32 can be easily operated with the left and right feet. Has been. In this embodiment, they are arranged so as to have a square shape as a whole.

According to this, unlike the operation with the changeover switch as in the prior art, an operation with a delicate touch is not required, and therefore, an erroneous operation is unlikely to occur. That is, it is possible to reliably press either the forward rotation push button 31 or the reverse rotation push button 32 with the intermediate protrusion as a reference. Further, since the two push buttons 31 and 32 are clearly separated, both cannot be operated at the same time, and there is no confusion.
For this reason, operativity improves and the working efficiency by an under-shelf electric work vehicle can be improved. Moreover, compared with a changeover switch having an extension part, an unexpected force hardly acts and the durability can be improved.

Reference numeral 45 denotes a handle portion, which is fixed to the upper end portion of the telescopic rod 46 a of the support column portion 46 fixed to the rear end portion of the base 10.
On the frame of the handle portion 45, a switch operation portion 35 of the handle portion is provided in parallel with the pair of switch operation portions 30A and 30B. 36 is a left changeover switch for operating the left endless track traveling apparatus 20A, and 37 is a right changeover switch for operating the right endless track traveling apparatus 20B (see FIG. 2). Reference numeral 38 denotes a master switch that activates the apparatus. Reference numeral 34 denotes a master switch provided at the front end.
According to this, traveling such as when moving can be suitably operated with the handle portion 45.

  In the above embodiments, the case where the traveling drive mechanism has an endless track that is operated by the driving force of the electric motor as a component has been described, but the present invention is not limited to this. When the use conditions are not strict, the traveling drive mechanism may include a wheel that rotates by the driving force of the electric motor as a component. According to this, compared with the case where an endless track is adopted, mobility can be improved and manufacturing cost can be reduced.

  Next, in the under-shelf electric work vehicle of the present invention, an example in which the headrest 50 supported by the shape memory alloy, the backrest, and the arm support 55 is provided will be described in detail with reference to the accompanying drawings (FIG. 1). .

  As shown in FIG. 1, the headrest 50 is a portion that receives and supports the head of the operator. Reference numeral 51 denotes a headrest support base, which is fixed to the seat 11. Reference numeral 50a denotes a long elastic member portion having a portion formed in a long shape by a shape memory alloy having superelastic characteristics, the upper end side being fixed to the headrest 50, and the lower end side being fixed to the headrest support base 51. ing. In this embodiment, the lower end side of the long elastic member 50a is inserted and fixed to the pipe-shaped headrest support base 51 so that the height can be adjusted. The long elastic member 50a may be provided not only by one but also by a plurality of two or more, and may be appropriately formed so that the load on the head can be appropriately received.

  According to the headrest 50, when the worker is in a posture to face up, the head of the worker can be supported so as to be biased upward by an elastic force. Further, the backrest may be provided at a position lower than the headrest 50 as a portion that abuts against the operator's back, and the form thereof can be provided in substantially the same manner as the headrest 50. According to this backrest, the weight of the upper body of the worker can be suitably received.

  As shown in FIG. 1, the arm support 55 is a portion that receives the upper arm portion of the worker and supports the arm. Reference numeral 56 denotes an arm support attachment portion, which is provided on the armrest portion of the seat 11. 55a is a long elastic member having a portion formed in a long shape by a shape memory alloy having superelastic characteristics, the lower end side being fixed to the arm support attaching portion 56, and the upper portion being a work It is connected to a portion 55b that receives the upper arm portion of the person. (Dotted line indicates a state in which the arm support 55 is bent.) In this embodiment, the lower end side of the long elastic member 55a can be adjusted in height to the pipe-shaped arm support attachment 56. Inserted and fixed. The long elastic member 55a may be provided not only by one but also by a plurality of two or more, and may be appropriately formed so that the load on the head can be appropriately received.

  Due to its superelastic characteristics, the shape memory alloy hardly increases stress (generated force) within a predetermined range above a certain displacement (strain rate). For this reason, even when the position of the supported head or upper arm is raised or lowered within a predetermined range, the load (biasing force) applied to the head or upper arm is less changed, and the neck is kept throughout And the burden on the arm is remarkably reduced. That is, according to this, an operator's head and upper arm part can be suitably received with a substantially constant force, and fatigue of the operator's neck and arm can be alleviated.

The long elastic members 50a and 55a of the present embodiment are titanium-nickel alloy shape memory alloys, and are manufactured in a form in which about 10 of the wires are bundled in a circle and plastic is molded at both ends. Thus, by using a linear material, it can respond | correspond appropriately to the use conditions calculated | required by selecting the thickness and the number suitably. Moreover, manufacturing cost can be reduced by using a versatile linear material.
A shape memory alloy other than the titanium-nickel alloy may be used. Moreover, it is not limited to simply bundling a plurality of linear members of shape memory alloy, and the long elastic members 50a and 55a may be provided by twisting the plurality of linear members. According to this, the long elastic members 50a and 55a can be integrated as a wire-shaped or rod-shaped long member, and behave appropriately as a single structure.
Further, the shape of the long elastic members 50a and 55a made of a shape memory alloy is not limited to this, and it is needless to say that other shapes such as a rod shape may be used.

  As described above, the present invention has been described in various ways with preferred embodiments. However, the present invention is not limited to these embodiments, and many modifications can be made without departing from the spirit of the invention. That's it.

DESCRIPTION OF SYMBOLS 10 Base 11 Seat 12 Floor part 20A Endless track traveling apparatus 20B Endless track traveling apparatus 21 Drive apparatus part 22 Starting wheel 23 Rolling wheel 25 Track belt 30A Switch operation part 30B Switch operation part 31 Push button 32 for forward rotation 32 For reverse rotation Push button 33 Protrusion 40 Rear wheel 50 Headrest 50a Long elastic member 55 Arm support 55a Long elastic member 55b Part for receiving the upper arm

Claims (5)

An under-shelf electric work vehicle used to work on an upper object in a state where an operator is sitting on a seat under the shelf,
A base on which the seat and the floor portion provided so as to be adjustable in height position are mounted;
A pair of travel drive mechanisms that are arranged on the front side of the base and on the left and right sides and that are independently driven by an electric motor that can rotate in both forward and reverse directions;
A rear wheel that is disposed on the rear side of the base and in the center in the left-right direction, and is driven and operated in accordance with travel by the pair of travel drive mechanisms;
A pair of switch operating portions provided on the upper surface of the floor portion are operated as a push button for forward rotation so that each of the pair of travel drive mechanisms is operated with a switch being turned on and off by stepping on a foot. An under-shelf electric work vehicle comprising: a reverse rotation push button; and a protrusion provided at an intermediate portion where both the push buttons are arranged.   The under-shelf electric work vehicle according to claim 1, wherein the traveling drive mechanism includes an endless track that is operated by a driving force of an electric motor.   The under-shelf electric work vehicle according to claim 1, wherein the traveling drive mechanism includes a wheel that rotates by a driving force of an electric motor as a component.   The under-shelf electric work vehicle according to any one of claims 1 to 3, wherein the seat is supported by a shape memory alloy and a headrest is provided so that the height can be adjusted.   The under-shelf electric work vehicle according to any one of claims 1 to 4, wherein the seat is supported by a shape memory alloy and an arm support is provided so that the height can be adjusted.

Images