JP3715079B2 - Transporter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a transport vehicle, and more particularly to a transport vehicle having an improved operation handle.
[0002]
[Prior art]
With the widespread use of greenhouses, melons have been actively cultivated even in cold regions. Large-scale greenhouses are 50 to 100 meters long in order to expect a large yield, and mechanical power is required to move fertilizers, seedlings, and crops.
In order to lighten the burden on the operator, for example, the use of the “electric carrier” disclosed in Japanese Utility Model Publication No. 51-31502 was examined.
[0003]
In this electric transporter, as shown in FIG. 1 of the publication, the electric motors 4, 4 ′, the front wheels 11 ′, and the rear wheels 17 are attached to the cargo bed frame 1 including the lower frame 2 and the vertical frames 3, 3 ′. It is a thing. As shown in FIG. 2, the front left wheel 11 is driven by the electric motor 4 through the chain and the sprocket, and the front right wheel 11 ′ is driven by the electric motor 4 ′ through the chain and the sprocket. This is an electric vehicle including wheels 17 and 17 'and batteries 15 and 15' between front and rear wheels. The electric motors 4 and 4 ′ can be independently controlled by operating the switch box 16 (FIG. 1 of the publication) on the handle 18 to turn the machine body.
[0004]
[Problems to be solved by the invention]
The electric transport vehicle disclosed in the above publication is the one in which the handle 18 is simply erected vertically with respect to the cargo bed frame 1 in order to turn the airframe with an electric motor without depending on human hands.
On the other hand, due to the lack of workers in recent years, this type of transport vehicle has been used not only by older boys but also by elderly people and women.
As a result, it has been found that the operator's physique has diversified and the operation handle attached to the conventional transport vehicle is extremely inconvenient.
Therefore, an object of the present invention is to improve the usability of the operation handle of the transport vehicle.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a first aspect of the present invention is directed to a transport vehicle in which a pair of left and right operation handles are extended from the rear part of a loading platform having a plurality of wheels. The transport vehicle has a handle tilt mechanism that can be operated by stepping. The operation handle is provided, and the height from the ground to the grip of the operation handle can be adjusted at any time.
[0006]
The handle lock is released by the stepping operation, the height from the ground to the grip of the operation handle is changed as desired, the stepping operation is released, and the operation handle is locked.
Since the ground clearance of the grip of the operation handle can be freely changed while holding the operation handle with both hands, the operation handle can be restored to an easy-to-use state, and the convenience of the transport vehicle is improved.
[0007]
Further , according to the first aspect of the present invention , the handle tilt mechanism integrally attaches a perforated plate having a plurality of holes to a pair of left and right operation handles, and a pair of left and right handle support brackets along the perforated plates. Installed at the rear, bosses are provided on the inner surface of these brackets, and spiral grooves are provided in the bosses.The tips of the shafts that pass through the tip of the shaft from the inside and project at right angles to the shafts are fitted into the spiral grooves. A substantially L-shaped arm is formed continuously on the shaft, the ends of these arms are opposed to each other, a compression spring is interposed between the ends of these arms, and a step pipe is provided between the ends of the arms and the compression spring. Then, by stepping on this step pipe, the pin is slid along the spiral groove to retract the shaft and open the hole. Remove from the plate to allow vertical tilt of the operating handle, characterized in that which was to be able to lock the operating handle is inserted into the plate aperture to the shaft by increasing the step pipe.
[0008]
By stepping on the step pipe with your foot, you can release the lock on the loading platform and move the operation handle up and down. If the foot is removed from the step pipe, the operation handle can be locked to the loading platform side.
The handle tilt mechanism is composed of a perforated plate, a spiral grooved boss, a shaft, an arm, a compression spring, and a step pipe, so each part can be easily manufactured and the overall structure is very simple, which may lead to price increases. There is no, and the price of the transport vehicle can be suppressed.
[0009]
According to a second aspect of the present invention, the driving source of the wheel is an electric motor.
Electric motors are heavy because they have magnets and coils as their main elements. When such an electric motor and a battery are provided, the transport vehicle becomes heavy overall. However, since the operation handle is convenient, it is possible to operate a heavy transporter vehicle with this operation handle.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals. “Left” and “right” are directions viewed from the operator, “front” is the forward side, “rear” is the opposite side, L is attached to the left member, and R is attached to the right member.
[0011]
FIG. 1 is a perspective view of an electric transport vehicle according to the present invention. An electric transport vehicle 1 as a transport vehicle has four wheels provided with left and right front wheels 2L and 2R and left and right rear wheels 3L and 3R (3R is not shown). It is a car and has batteries 4L and 4R (the right battery 4R is not shown) between the front and rear wheels, and a frame 7 is attached to the front part of the loading platform 5 extending forward and backward by bolts 7. The same applies to the following, and the fences 8 and 8 are attached to the frame frame 6 and the rear surface of the loading platform 5, and the operation handles 9L and 9R are extended diagonally upward from the rear wheels 3L and 3R to operate these operations. Handles 9L and 9R are attached to the vehicle body side via a handle tilt mechanism 60, which will be described later, and a brake lever 11 is attached to the left handle 9L, and a transmission lever 12 is attached to the right handle 9R.
[0012]
FIG. 2 is an exploded perspective view of the lower structure of the electric vehicle according to the present invention. The vehicle body frame 20 includes a motor mount base 22, an outer cylinder 23, and a gear case mount base 24 from the top to the front of the main frame 21. The battery support pieces 25 and 26 are provided at the center, and the torii type rear frame 27 is provided at the rear. The rear frame 27 includes a pair of left and right vertical frames 29L and 29R that support the rear axle 28, and a horizontal frame 31 that directly receives the cargo bed.
[0013]
The rear wheel axle 28 is a non-rotating shaft, and after inserting the base portions 32 and 32 of the operation handles 9L and 9R, the rear wheels 3L and 3R can be attached with washers 33 and 33 and bolts 34 and 34. The rear wheels 3L and 3R are free rotating wheels.
[0014]
Holes 25a and 25b are formed in the battery support piece 25. Similarly, holes 26a and 26b are formed in the battery support piece 26. One end of the battery cage 37 is inserted into the front holes 25a and 26a, and the battery cage 37 is inserted into the holes 25a and 25a. The hole 26a can be tilted about the fulcrum. A right battery cage (not shown) can be attached to the holes 25b and 26b.
[0015]
Next, the front wheel drive system will be described.
The electric transport vehicle of the present invention is characterized in that the front wheels 2L and 2R are driven by the electric motor 38 through the shaft direct drive system 40. Since no chain or belt is used, there is no starting shock, a large torque can be transmitted to the front wheels 2L and 2R, and smooth and powerful running can be achieved.
For this purpose, a shaft direct drive system 40 includes a relay shaft 41 into which the output shaft 38a can be inserted, a pinion bevel gear 42 attached to the lower end of the shaft 41, a large-diameter bevel gear 43 that meshes with the pinion bevel gear 42, and a large It consists of a front wheel axle 44 splined to the radial bevel gear 43 and wheel connecting brackets 45, 45.
[0016]
The wheel connecting bracket 45 has a square flange 47 attached to a pipe 46, and the front wheel 2 </ b> L or 2 </ b> R is attached to the square flange 47 with a bolt 48... And the pipe 46 is fitted to one end of the front wheel axle 44. It is an attachment to be fixed. For example, by opening a plurality of bolt holes 46a... In the pipe 46, the insertion depth of the pipe 46 can be changed to change the distance between the front wheels 2L, 2R (front wheel tread). it can.
In the figure, bearings and oil seals are omitted.
[0017]
FIG. 3 is a side view of the electric vehicle according to the present invention, in which the loading platform 5 is gently tilted forward and the loading frame 5 is directly received by the motor case 38b of the electric motor 38. The motor shaft L2 is generally disposed on the vertical line L passing through the front wheel axle 44, the hanger bolt 51 for hanging the free end of the battery cage 37 is attached to the loading platform 5, the operation handle 9L , 9R (9R not shown) is locked to the vehicle body side, that is, the loading platform 5 via the handle tilt mechanism 60.
[0018]
FIG. 4 is a side view of the handle tilt mechanism according to the present invention. The handle tilt mechanism 60 has a perforated plate 62 in which a plurality of holes 61a, 61b, 61c are opened in the operation handles 9L, 9R (9R is not shown). On the other hand, a pair of left and right handle support brackets 63 and 63 (the rear 63 is not shown) are attached to the rear part of the loading platform 5 along these perforated plates 62. Bosses 64, 64 (the back 64 is not shown) are provided on the side surfaces, and the ends of shafts 65, 65 (the back 65 are not shown) are passed through the bosses 64, 64 from the inside. Arms 66 and 66 (the rear 66 is not shown) are continuously formed so that one end portions of the arms 66 and 66 are opposed to each other (described in FIG. 5 described later), and one end portions of the arms 66 and 66 are mutually opposed. The those enclosed in Step pipe 67.
[0019]
5 is a view taken in the direction of arrow 5 in FIG. 4. Although not described in FIG. 4, the boss 64 includes a spiral groove 71, the shaft 65 includes a pin 72 that fits into the spiral groove 71, and is substantially L-shaped. A compression spring 73 is provided between one end portions of the arms 66 and 66, and the compression spring 73 and one end portions of the arms 66 and 66 are collectively surrounded by the step pipe 67.
[0020]
FIG. 6 is an operation diagram of FIG. 5. When an operator steps on the step pipe 67, the arms 66 and 66 turn around the bosses 64 and 64, and the pins 72 and 72 move along the spiral grooves 71 and 71 with arrows ▲. Move as 1 ▼, ▲ 1 ▼. As a result, the tips of the shafts 65, 65 are disengaged from the holes 61b, 61b. Further, as the movements {circle around (1)} and {circle around (1)}, the arms 66 and 66 approach the center as shown by arrows {circle around (2)} and {circle around (2)} to contract the compression spring 73.
In this state, the operator can raise and lower the operation handles 9L and 9R.
[0021]
Thereafter, if the foot is removed or the step pipe 67 is kicked up, the process returns to FIG. That is, the tips of the shafts 65 and 65 can be inserted into arbitrary holes (holes 61a to 61c in FIG. 4) of the perforated plate 62, and the locking of the operation handle is completed by this insertion.
[0022]
FIG. 7 is a plan view of the electric transport vehicle according to the present invention. The loading platform 5 is an elongated flat plate substantially covering the front wheels 2L and 2R, the batteries 4L and 4R, and the rear wheels 3L and 3R. , 8 is an enlargement of the loadable area, which is suitable for placing a case or box with a bottom. Since the area of the loading platform 5 is significantly reduced with respect to the loadable area, the weight of the loading platform 5 can be reduced. However, since the loading platform 5 can be expanded to the area enclosed by the fences 8 and 8, the loading platform 5, the frame frame 6 and the fences 8 and 8 may be arbitrarily determined according to the application.
[0023]
An instrument plate 75 facing the operator is attached to the rear edge of the cargo bed 5 so as to cover the main part of the handle tilt mechanism 60 provided at the rear portion of the cargo bed 5, and the main switch 76 and forward / reverse switching are attached to the instrument plate 75. It shows that the switch 77 and the battery remaining amount meter 78 are attached. 79... Are bolts for fixing the cargo bed to the electric motor.
[0024]
As is apparent from FIG. 7, the main part of the handle tilt mechanism 60 is not visible from above, and only the step pipe 67 and the arm 66 are visible.
Specifically, as shown in FIG. 5, since the spiral grooves 71 and 71 are covered with the instrument panel 75, there is no fear that rainwater or mud is applied to the spiral grooves 71 and 71 from above, and the handle tilt mechanism 60 can be used stably. .
[0025]
The operation of the electric transport vehicle having the above configuration will be described next.
8A and 8B are operation diagrams of the handle tilt mechanism according to the present invention.
In (a), if the tip end of the shaft 65 is inserted into the lowermost hole 61c of the perforated plate 62, the height H1 from the ground to the grip of the operation handle becomes sufficiently large, which is suitable for tall workers. Become.
[0026]
In (b), if the tip of the shaft 65 is inserted into the uppermost hole 61a of the perforated plate 62, the height H2 from the ground to the grip of the operation handle becomes sufficiently small, and it is suitable for a short operator. Become.
Therefore, by arbitrarily selecting the holes 61a to 61c according to the preference of the operator, the height from the ground to the grip of the operation handle can be easily changed, and it is not necessary to interrupt the transporting work when changing. . The number of holes 61a to 61c in the perforated plate 62 can be changed.
[0027]
In the above embodiment, a handle tilt mechanism is attached to the electric transport vehicle. In the electric vehicle, the electric motor and the battery are heavy and the vehicle body is heavy as compared with the gasoline engine-driven vehicle. In the past, the operation handle was not expected so much because the body was extremely heavy. However, according to the present invention, since the operation handle is very easy to use, the traveling direction can be changed with the operation handle.
[0028]
Since the handle tilt mechanism of the present invention is intended to improve the usability of the operation handle, it is not limited to an electric vehicle, but is applied to an internal combustion engine-driven vehicle equipped with a gasoline engine or a diesel engine or a hand-carried vehicle without an engine. May be.
Also, the number of wheels that support the loading platform is suitably four or three, but it may be two or one more or less than that.
[0029]
The handle tilt mechanism according to the first aspect of the present invention is not limited to the embodiment as long as it is a mechanism capable of releasing the lock by stepping and locking the operation handle to the loading platform side by releasing or lifting the foot.
Further, in claim 2, the step pipe may be a round pipe, a square pipe or an elliptical pipe, and the compression spring may be a coil spring or an elastic rubber.
[0030]
【The invention's effect】
The present invention exhibits the following effects by the above configuration.
Claim 1 is a transport vehicle in which a pair of left and right operation handles are extended from the rear part of a loading platform having a plurality of wheels. The transport vehicle includes an operation handle via a handle tilt mechanism that can be operated by stepping. The height from the ground to the grip of the operation handle can be adjusted.
[0031]
The handle lock is released by the stepping operation, the height from the ground to the grip of the operation handle is changed as desired, the stepping operation is released, and the operation handle is locked.
Since the ground clearance of the grip of the operation handle can be freely changed while holding the operation handle with both hands, the operation handle can be restored to an easy-to-use state, and the convenience of the transport vehicle is improved.
[0032]
Further , according to the first aspect of the present invention , the handle tilt mechanism integrally attaches a perforated plate having a plurality of holes to a pair of left and right operation handles, and a pair of left and right handle support brackets along the perforated plates. Installed at the rear, bosses are provided on the inner surface of these brackets, and spiral grooves are provided in the bosses.The tips of the shafts that pass through the tip of the shaft from the inside and project at right angles to the shafts are fitted into the spiral grooves. A substantially L-shaped arm is formed continuously on the shaft, the ends of these arms are opposed to each other, a compression spring is interposed between the ends of these arms, and a step pipe is provided between the ends of the arms and the compression spring. Then, by stepping on this step pipe, the pin is slid along the spiral groove to retract the shaft and open the hole. Remove from the plate to allow vertical tilt of the operating handle, characterized in that which was to be able to lock the operating handle is inserted into the plate aperture to the shaft by increasing the step pipe.
[0033]
The handle tilt mechanism is composed of a perforated plate, a spiral grooved boss, a shaft, an arm, a compression spring, and a step pipe, so each part can be easily manufactured and the overall structure is very simple, which may lead to price increases. There is no, and the price of the transport vehicle can be suppressed.
[0034]
According to a second aspect of the present invention, the driving source of the wheel is an electric motor.
Electric motors are heavy because they have magnets and coils as their main elements. When such an electric motor and a battery are provided, the transport vehicle becomes heavy overall. However, since the operation handle is convenient, it is possible to operate a heavy transporter vehicle with this operation handle.
[Brief description of the drawings]
FIG. 1 is a perspective view of an electric vehicle according to the present invention. FIG. 2 is an exploded perspective view of a lower structure of the electric vehicle according to the present invention. FIG. 3 is a side view of the electric vehicle according to the present invention. FIG. 5 is a side view of the handle tilt mechanism according to the present invention. FIG. 5 is a view taken along arrow 5 in FIG. 4. FIG. 6 is an operational view of FIG. Of the handle tilt mechanism related to the wheel [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Transport vehicle (electric transport vehicle), 2L, 2R ... Wheel (front wheel), 3L, 3R ... Wheel (rear wheel), 4L, 4R ... Battery, 5 ... Loading platform, 9L, 9R ... Operation handle, 38 ... Electric motor , 60: Handle tilt mechanism, 61a to 61c ... Hole, 62 ... Hole plate, 63 ... Handle support bracket, 64 ... Boss, 65 ... Shaft, 66 ... Arm, 67 ... Step pipe, 71 ... Spiral groove, 72 ... Pin 73 ... Compression spring.

Claims (2)

A pair of left and right operating handles are extended from the rear of the loading platform with a plurality of wheels, and these operating handles are attached to the loading platform via a handle tilt mechanism that can be operated by stepping. In a transport vehicle that can be adjusted at any time,
The handle tilt mechanism integrally attaches a perforated plate having a plurality of holes to a pair of left and right operation handles, and attaches a pair of left and right handle support brackets along the perforated plates to the rear part of the cargo bed, Boss is provided on the inner surface of these brackets and spiral grooves are provided in the bosses, and the tips of the shafts that are passed through the bosses from the inside and projecting at right angles to the shafts are fitted into the spiral grooves. L-shaped arms are continuously formed, one end portions of the arms are opposed to each other, a compression spring is interposed between the one end portions of the arms, and a step pipe is covered with the end portions of the arms and the compression spring. By stepping on the step pipe, slide the pin along the spiral groove to retract the shaft and open the hole. Remove from and reports open to allow vertical tilt of the operating handle, luck you characterized in that that to be able to lock the operating handle is inserted into the plate aperture to the shaft by increasing the step pipe Carriage. Claim 1 Symbol placement transportation vehicles and wherein the driving source of the wheels is an electric motor.

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