JPH0671364U - Carrier - Google Patents

Abstract

(57) [Summary] [Purpose] Use a narrow wheel gap in places where the passage is narrow, such as in a greenhouse for greenhouses, greenhouses, or in livestock sheds, and use it with a wide wheel gap on general roads. To provide an electric carrier that does not generate exhaust gas or noise. [Composition] A transport vehicle equipped with a pair of left and right front wheels and rear wheels on a vehicle body, one of the front wheels and the rear wheels being a driving wheel and the other being an idle wheel, and having a steering handle, The distance between the idle wheel and the distance between the drive wheels is set to a minimum, and the distance over which the idle wheel extends a certain distance outside the predetermined range is set to a maximum. It is possible to extend and retract. The drive wheels are driven by a motor, and the idler wheels are mounted as casters on the tip ends of a pair of pivot arms pivotally supported in the vehicle body in a horizontal direction. The part is connected to a piston of an electric or manual cylinder mechanism through a link member, and the idler wheel is expanded and contracted by the expansion and contraction operation of the piston.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention can be used with a narrow wheel gap in places with narrow passages such as in greenhouses, greenhouses, and livestock sheds, and can be used with wide wheel gaps on general roads. The present invention relates to a transport vehicle that does not generate noise or noise.

[0002]

[Prior art]

 Conventionally, as a transport vehicle used in horticultural houses, greenhouses, livestock houses, etc., the body is equipped with a pair of left and right front and rear wheels, and one of the front and rear wheels is driven by an engine. It is known that the wheel is used as the wheel and the other wheel is the idle wheel, and a steering wheel is provided. In such a transport vehicle, it is required to have a narrow vehicle width and wheel width (tread) in order to travel in a narrow passage, and because it is used indoors, there is no emission of engine exhaust gas or noise. Although there are demands for goods, there are currently no vehicles that satisfy such requirements.

[0003]

[Problems to be solved by the device]

 Generally, the passages for vehicles in garden houses, greenhouses, or barns are narrow, and can only be used with vehicles with a narrow vehicle width or wheel width. However, if a vehicle such as this is loaded with luggage and goes out from a horticultural house or greenhouse, or from a livestock shed to a general road (irregular terrain), the vehicle becomes unstable due to the narrow vehicle width and wheel width. There was a problem that it was easy to fall in the left and right directions. There is also a problem that engine exhaust gas and noise generated in garden houses, greenhouses, and livestock houses adversely affect workers, crops, livestock, etc. and deteriorate the environment. The present invention has been made to solve the above problems.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides (1) a vehicle body equipped with a pair of left and right front and rear wheels, one of the front and rear wheels being a driving wheel and the other being a free wheel. At the same time, in a vehicle equipped with a steering handle, the wheel distance of the idle wheel is set to a minimum distance that is approximately equal to the drive wheel distance, and the maximum distance over which a fixed distance is extended outside in a certain range. It is configured so that it can be freely expanded and contracted between the above-mentioned minimum distance and maximum distance.

(2) The drive wheels are driven by a motor, and the idler wheels are used as casters and attached to the tip end portions of a pair of rotating arms pivotally supported in the vehicle body in a horizontally rotatable manner. The base end portion of the rotating arm is connected to the piston of the cylinder mechanism via a link member, and the idle wheel is expanded and contracted by the expansion and contraction operation of the piston.

[0006]

[Action]

 With the above structure, the carrier of the present invention has the following functions. The distance between the idle wheel and the distance between the drive wheels is set to a minimum, and the distance over which the idle wheel extends a certain distance outward is set to a maximum. Since it can be expanded and contracted, it is possible to drive with narrow idle wheel distances in gardening houses, greenhouses, or in livestock houses, and to widen idle wheel distances when traveling on general roads (irregular terrain). And drive stably.

The drive wheels are driven by a motor, and the idler wheels are used as casters and attached to the tip ends of a pair of rotating arms pivotally supported in the vehicle body for horizontal rotation. The base end of the is connected to the piston of the cylinder mechanism via the link member, and the expansion and contraction movement of the piston causes the idler wheel to expand and contract.Therefore, the exhaust gas in the garden house or greenhouse or in the livestock shed No noise is generated, and the idle wheel can be easily expanded and contracted by the cylinder mechanism.

[0008]

【Example】

 Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In FIGS. 1 and 2, reference numeral 1 denotes a transport vehicle. The transport vehicle 1 is equipped with a front wheel 3 and a rear wheel 4 forming a pair of right and left on a vehicle body 2 having a relatively narrow vehicle width. The drive wheels are used and the rear wheels 4, 4 are idle wheels. A steering handle 5 is provided at the rear of the vehicle body 2, and grips 5a, 5a that are gripped by an operator are provided at both ends of the steering handle 5, and an operation box 6 is provided above the steering handle 5. The front wheels (driving wheels) 3 and 3 are pivotally supported so as to be driven by motors 7 and 7, respectively. The rear wheels (idling wheels) 4 and 4 are formed by casters.

As shown in FIGS. 3 to 6, the rear wheels (idling wheels) 4 and 4 rotate horizontally on a vehicle body frame 8 constituting the vehicle body 2 via pivot shafts 9 and 9. It is attached to the tip ends of a pair of rotating arms 10 that are rotatably supported. A connecting plate 13 is connected to a piston 12a of an electric cylinder 12 which is supported in the front-rear direction at the center of the vehicle body frame 8 in the width direction via link members 11, 11 at the base end portions of the both rotating arms 10, 10. The rear wheels (idling wheels) 4 and 4 are expanded and contracted laterally by the expansion and contraction operation of the piston 12a.

Battery cases 14 and 14 are provided on the body frames 8 on both the left and right sides of the electric cylinder 12, and the motors 7 and 7 and the electric cylinders are driven from a battery (not shown) housed in the battery cases 14 and 14. Power is supplied to 12 and is operated by a switch, an operation lever (not shown) or the like provided on the operation box 6. Instead of the electric cylinder 12, a moving mechanism that is manually operated may be used.

The front wheels (driving wheels) 3, 3 are not provided with a diff device, but when an operator grips the grips 5 a, 5 a of the steering handle 5 and operates in the turning direction, the front wheels (driving wheels) on the turning side are driven. (Wheel) 3 is loaded and its rotation speed becomes slower, and the front wheel (driving wheel) 3 on the opposite side becomes faster in rotation speed so that it can turn as in the case where a differential device is provided. . Also, when the rear wheels (idling wheels) 4 and 4 are telescopically moved in the left-right direction, the rear wheels (idling wheels) 4 and 4 can be moved by the casters even when the transport vehicle 1 is running or stopped. Since it is configured, it can be smoothly expanded and contracted with little resistance.

As shown in FIG. 1, the wheel distance (tread) between the rear wheels (idling wheels) 4 and 4 is substantially equal to the wheel distance between the front wheels (driving wheels) 3 and 3 (see FIGS. 1 and 2). 3) (shown by phantom lines) is the minimum, and the interval overhanging a certain distance outward from this is the maximum (shown by solid lines in FIGS. 1 and 3). By the expansion / contraction operation of the piston 12a of the electric cylinder 12, the space between and can be freely expanded / contracted via the link members 11 and 11 and the rotating arms 10 and 10.

Next, the operation of the transport vehicle 1 configured as described above will be described. When the carrier 1 is used in a place with a narrow passage such as a greenhouse or a greenhouse, or a livestock house, the rear wheels (idling wheels) 4 and 4 are used to measure the wheel distance (tread). Use as narrow as shown by the virtual line. Since passages such as in a greenhouse or in a greenhouse or a livestock house are often maintained, it is possible to drive stably even when the carrier 1 is loaded with luggage.

When traveling on an open road (irregular terrain) with the carrier 1 loaded with luggage, or with the carrier 1 loaded with cargo left on the open road from a garden house, greenhouse, livestock house, etc. When driving, the vehicle body 2 is prone to tipping over to the left and right, especially on rough terrain, which is dangerous. Therefore, the wheel distance (tread) of the rear wheels (idle wheels) 4 and 4 is indicated by solid lines in FIGS. 1 and 3. As shown in the figure, when the vehicle body 2 is widened and used, it is possible to prevent the vehicle body 2 from tipping over to the left and right and to run stably.

When the wheel distance (tread) of the rear wheels (idling wheels) 4, 4 is maximized as shown by the solid lines in FIGS. 1 and 3, the piston 12a of the electric cylinder 12 is in the most contracted state. Yes, and the piston 12a of the electric cylinder 12 is extended most when the wheel distance (tread) of the rear wheels (idling wheels) 4 and 4 is minimized as shown by the phantom lines in FIGS. Is in a state. By the expansion / contraction operation of the piston 12a of the electric cylinder 12, the wheel distance (tread) of the rear wheels (idling wheels) 4 and 4 can be freely expanded / contracted from the maximum width to the minimum width. Since the wheels 4 and 4 are made up of casters, they can freely follow and move smoothly.

On / off switches for the power sources of the motors 7, 7 and the electric cylinders 12 for driving the front wheels (driving wheels) 3, 3, and a forward / reverse switching lever for the vehicle body 2 by forward / reverse rotation of the motors 7, 7. A speed control knob for adjusting the traveling speed of the vehicle body 2 by changing the rotation speeds of the motors 7 and 7 is provided in the operation box 6 and is operated by an operator who holds the grips 5a and 5a of the control handle 5 to operate. It When the vehicle body 2 is steered and turned, when the steering handle 5 is applied to the steering and turning sides, the front wheel (driving wheel) 3 on the steering and turning side is loaded and the rotation speed becomes slow. Therefore, the rotation speed of the front wheel (driving wheel) 3 on the opposite side is increased, and the steering / turning can be performed as in the case where the differential device is provided.

Further, the transport vehicle 1 is configured so that the front wheels (driving wheels) 3 and 3 are driven by the motors 7 and 7 and the cylinder mechanism is configured by the electric cylinder 12 and no engine is used. No exhaust gas or noise is generated when carrying the product in a house, greenhouse or livestock house. Therefore, it does not adversely affect workers who work in garden houses and greenhouses, or in livestock houses, crops cultivated in garden houses and greenhouses, and livestock raised in livestock houses.

[0018]

[Effect of device]

 As explained above, according to the carrier of the present invention, the following effects can be obtained. The distance between the idle wheel and the distance between the drive wheels is set to a minimum, and the distance over which the idle wheel extends a certain distance outward is set to a maximum. Since it is extendable and retractable, when traveling in a narrow passage in a greenhouse or greenhouse, or in a livestock house, the idle wheels should run as narrowly as the drive wheels, and should be used on general roads (irregular terrain). ), It is possible to drive stably by widening the idle wheel distance.

The drive wheels are driven by a motor, and the idler wheels are used as casters and attached to the tip ends of a pair of rotating arms that are pivotally supported in the vehicle body for horizontal rotation. The base end of the is connected to the piston of the cylinder mechanism via a link member, and the expansion and contraction movement of the piston causes the idler wheel to expand and contract, so it can be carried in a gardening house, greenhouse, or in a livestock house. When doing, it does not generate exhaust gas or noise and does not adversely affect workers, crops, livestock, etc. Further, the expansion / contraction movement of the idler wheel can be easily performed by the expansion / contraction operation of the piston of the cylinder mechanism.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a main part of a carrier according to the present invention.

FIG. 2 is a perspective view of an entire carrier according to the present invention.

FIG. 3 is a plan view of an extension / contraction operating mechanism of an idler wheel.

FIG. 4 is a side view of the same.

FIG. 5 is a rear view of the same.

FIG. 6 is a front view of a cylinder mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transport vehicle 2 Vehicle body 3 Front wheel (driving wheel) 4 Rear wheel (idling wheel) / caster 5 Steering handle 5a Grip 6 Operation box 7 Motor 8 Body frame 9 Pivot shaft 10 Rotating arm 11 Link member 12 Electric cylinder 12a Piston 13 Connecting plate 14 Battery case

Claims (2)

[Scope of utility model registration request] 1. A transport vehicle having a front wheel and a rear wheel forming a pair of left and right on a vehicle body, one of the front wheel and the rear wheel being a driving wheel and the other being an idle wheel, and having a steering handle, The distance between the idle wheel and the distance between the drive wheels is set to a minimum, and the distance over which the idle wheel extends a certain distance outside the predetermined range is set to a maximum. A transport vehicle characterized by being configured to be extendable and retractable. 2. The drive wheels are driven by a motor, and the idler wheels are used as casters and mounted on the tip ends of a pair of rotating arms pivotally supported in the vehicle body for horizontal rotation. 2. The transport vehicle according to claim 1, wherein the base end portion of the moving arm is connected to the piston of the cylinder mechanism via a link member, and the idler wheel is expanded and contracted by the expansion and contraction operation of the piston.