JP2022170748A - One-wheel handcart - Google Patents

Abstract

To provide a one-wheel handcart equipped with an assist function capable of reducing labor required for conveyance work and stably changing a course in a direction desired to turn.SOLUTION: A one-wheel handcart includes a bucket 1 capable of loading a load, a pair of right and left handles 3a, 3a provided integrally with the bucket 1, and a driving wheel unit 9 provided on a lower region of the bucket 1 to be movable in all directions. The left handle 3a is provided with a direction selecting switch 7a. The right handle 7b is provided with a driving switch 7b. When both the direction selecting switch 7a and the driving switch 7b are simultaneously input, a wheel of the driving wheel unit 9 performs rotating operation and turning operation.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to an improvement of a push-type unicycle, for example, a push-type unicycle used for transporting materials, agricultural products, etc. at construction sites, farmlands, and the like.

At construction sites and farmlands, push-type unicycles commonly called cats are often used to transport materials and agricultural products.

In the case of this type of unicycle, in the case of a powerless worker, a large amount of labor is required to move and transport the unicycle, and it is difficult to balance the unicycle, and there is a risk that the unicycle may tip over.
In addition, since it was necessary to tilt the entire unicycle in the direction of the turn in order to change direction, it was difficult to maintain balance, and non-experts had to get used to it.

Therefore, conventionally, as disclosed in Patent Document 1, an invention has been proposed in which an electric drive wheel unit is used to assist movement of a unicycle.

However, in the case of this prior art, although the assist function reduced the labor required for moving and transporting, it only assisted movement in the straight direction, so it was still necessary to tilt the unicycle itself when changing directions. As a result, the problem of losing balance and falling over remained.

In addition, as in Patent Document 2, a prior art is also disclosed in which a training wheel is provided to maintain balance and prevent overturning.
However, the use of training wheels makes it difficult to handle, so it is not suitable for changing directions in a narrow area.

Therefore, Patent Document 3 has been proposed as a prior art that has an assist function and can change direction by steering operation.

The unicycle disclosed in Patent Document 3 is provided with a steering wheel, and the steering operation changes the direction of the wheels so that the unicycle can move.
However, due to its structure, there is a limit to the steering angle, and even if the steering is operated, it cannot be turned right or left in the direction of 90 degrees, and can only be moved in an oblique direction. Furthermore, when moving diagonally by operating the steering wheel, the center of gravity of the chassis is not on the extension line in front of the steering wheel, so there is a problem that stable movement is not possible.

JP-A-2006-082792 JP 2009-083842 A JP 2015-009601 A

The present invention has been made to solve such problems of the prior art, and the object of the present invention is to provide an assist function to reduce the labor required for carrying work, and to stably turn in the desired direction. To provide a hand-pushed unicycle capable of changing direction.

In order to achieve this object, the first invention provides a bucket capable of loading cargo,
a handle integral with the bucket;
The hand-pushed unicycle is characterized by comprising a drive wheel unit which is provided in the lower region of the bucket and is movable in all directions.

In a second aspect of the present invention, in the first aspect of the present invention, the handles are provided continuously from the left end and the right end of the upper rear part of the bucket, and grip portions are provided on the distal end sides of the respective handles,
the grip portion includes an input device that transmits a rotational motion and a turning motion to the driving wheel unit;
The input device is provided on one of the left and right handles, and is a drive switch for transmitting rotational motion;
and a direction selection switch provided on the other handle for transmitting turning motion.

In a third aspect of the present invention based on the first aspect of the present invention or the second aspect of the present invention, the drive wheel unit is controlled to operate only when both the drive switch and the direction selection switch are simultaneously input. It is a push-type unicycle characterized by being

In a fourth aspect of the present invention, in any one of the first aspect to the third aspect of the present invention, the drive switch and the direction selection switch are positioned such that they can be operated with a thumb when the grip is gripped. It is a push-type unicycle characterized by being arranged in.

According to the present invention, it is possible to provide a push-type unicycle that is equipped with an assist function to reduce the labor required for transportation work and that can stably change direction in a desired direction.

It is a schematic perspective view showing one embodiment of the present invention. In the schematic side view of this embodiment, (a) shows a state in which the wheels are turning in a straight traveling direction, and (b) shows a state in which the vehicle is turning 90 degrees from the straight traveling state to change direction. FIG. 4 is a schematic plan view showing an enlarged direction selection switch provided on the handle portion; FIG. 4 is a schematic plan view showing an enlarged drive switch provided on the handle portion;

An embodiment of the push-type unicycle of the present invention will be described below.
In this embodiment, a push-type unicycle used at construction sites, farmlands, and the like can be given as an example.
It should be noted that this embodiment is only one embodiment of the present invention, and can be used in general push-type unicycles, and is not to be construed as being limited to this embodiment, and can be appropriately modified within the scope of the present invention. is.

The push-type unicycle of this embodiment is composed of a bucket 1 capable of loading cargo, a pair of left and right handles 3 integrally provided with the bucket 1, and one drive wheel unit 9 provided in the lower region of the bucket 1. It is

In this embodiment, it is assumed that the bucket 1 and the handle 3 are integrally formed. That is, a round bar-shaped left handle 3a and a right handle 3b are continuously and integrally provided from the left end and the right end of the rear upper portion of the bucket 1, respectively.

The left and right handles 3a, 3b are provided with grip portions 5a, 5b at their distal ends, respectively.
The grip portions 5a and 5b are provided with an input device 7 for transmitting rotational motion and turning motion to the driving wheel unit 9. As shown in FIG.

The input device 7 is composed of a direction selection switch 7a and a drive switch 7b.

The direction selection switch 7a is a switch for transmitting turning motion to the wheel 11 in the front, rear, left, and right directions, and is provided in the grip portion 5a of the other handle 3, for example, the left handle 3a in this embodiment (FIGS. 1 and 2). See Figure 3). In FIG. 3, "front" indicates the forward direction, "rear" indicates the rearward direction, "left" indicates the leftward direction, and "right" indicates the rightward direction. If you want to move forward press the "forward" direction switch, if you want to move backward press the "back" direction switch, if you want to move left press the "left" direction switch If you want to move to the right, press the "right" direction switch.

The drive switch 7b is a switch for transmitting a rotational motion to the wheels 11, and is provided on the grip portion 5b of one of the pair of left and right handles 3, for example, the right handle 3b in this embodiment (see FIG. 1). and Figure 4).

The direction selection switch 7a and the drive switch 7b are arranged at positions where input operations can be performed with the thumb when the grip portions 5a and 5b are held. In this embodiment, they are arranged on the top surfaces of the grips 5a and 5b at the same distances L1 and L1 from the ends in the length direction of the grips 5a and 5b.
The reason why the position where the thumb can be input is set is that the handle 3 (3a, 3b) can be gripped to support the unicycle as a whole and the input operation can be performed reliably.

The drive wheel unit 9 is assumed to be an omnidirectional drive wheel unit that is disposed in the lower front region of the bucket 1 and has one wheel 11 that can be driven in all directions. Specifically, it is fixed to the tapered surface portion 1 a forming the lower surface of the bucket 1 .

The driving wheel unit 9 includes, for example, although not shown, a control section that receives signals from the input device 7 (7a, 7b), a driving section (driving motor) that receives signals from the control section and drives, and a driving section. An omnidirectional drive wheel capable of turning the wheels 11 in all directions, front, rear, left, and right, comprising a transmission mechanism for transmitting the rotational movement from the drive unit to the wheels 11 and a transmission mechanism for converting the rotational movement from the driving unit into turning movement. is a unit.
A well-known omnidirectional drive wheel unit is appropriately selected within the scope of the present invention as a drive wheel unit having a transmission mechanism for transmitting rotational motion to the wheels 11 and a transmission mechanism for turning the wheels 11 in the lateral direction. Adoptable. Although the description of the specific configurations of the mechanism for transmitting the rotation operation and the mechanism for transmitting the turning operation will be omitted, A configuration such as a directional drive wheel unit can be employed.

In this embodiment, the drive wheel unit 9 is controlled by the controller so as to operate only when both the direction selection switch 7a and the drive switch 7b are simultaneously input.
The reason why the drive wheel unit 9 operates only when both the direction selection switch 7a and the drive switch 7b are simultaneously input is to avoid the inconvenience of operation at a timing not intended by the operator. This is to prevent it and increase safety.

Therefore, the operator grasps the grip portions 5a and 5b of the left handle 3a and the right handle 3b, respectively, and moves the drive switch 7b and the direction selection switch 7a forward, backward, leftward, or rightward. When the direction selection switches are input (pressed) at the same time, the input signal is sent to the control unit, and the wheels 11 are rotated by the rotation operation of the driving unit that receives the signal from the control unit, and the wheels 11 are rotated in a predetermined direction. Make a turning motion.
In this way, since the wheel 11 itself rotates as well as rotates, its omnidirectional assist function allows the unicycle to maintain a horizontal posture without tilting the unicycle itself even when the user wants to turn in the desired direction, for example, to the right or left. It is possible to change the direction and carry it while maintaining it (without tilting the car body as in the past). Therefore, unlike the conventional unicycle, it is not necessary to tilt the unicycle itself to change direction.
In addition, since it has an omnidirectional assist function, it is easy to handle and even a powerless beginner can safely and easily carry out the transport work by the unicycle, thus reducing the labor and burden of the operator.

In this embodiment, a round-bar-shaped left handle 3a and a right handle 3b are continuously and integrally provided from the left end and the right end of the rear upper portion of the bucket 1, respectively. The pair of right handlebars 3b may not be protruded, but may be constructed as follows.
For example, the handle 3 includes a first rod-shaped portion projecting from the left end of the rear upper portion of the bucket 1, a second rod-shaped portion projecting from the right end, and a third rod-shaped portion extending between the first rod-shaped portion and the second rod-shaped portion. A rectangular frame-shaped handle in a plan view, which is composed of a bar-shaped portion, may also be used. In this case, grip portions 5a and 5b are provided at portions to be handled portions, for example, portions of the first rod-shaped portion and the second rod-shaped portion that face each other, and a direction selection switch 7a is provided on each of the grip portions 5a and 5b. and a drive switch 7b may be provided.
Alternatively, the bucket 1 and the handle 3 may be configured to be separable. For example, the handle may be integrally formed with a rectangular frame, and the bucket may be detachably incorporated into the frame. may The shape of the bucket is not particularly limited and can be changed within the scope of the present invention.

INDUSTRIAL APPLICABILITY The present invention can be used for push-type unicycles in general other than unicycles used at construction sites, agricultural work, and the like.

1 bucket 3a left handle 3b right handle 5a grip portion 5b grip portion 7a direction selection switch 7b drive switch 9 drive wheel unit 11 wheel

Claims (4)

a bucket capable of loading cargo;
a handle integral with the bucket;
A push-type unicycle characterized by comprising a driving wheel unit which is provided in the lower region of the bucket and is movable in all directions. The handles are provided continuously from the left end and the right end of the rear upper part of the bucket, and each handle has a grip part on the terminal side,
the grip portion includes an input device that transmits a rotational motion and a turning motion to the driving wheel unit;
The input device is provided on one of the left and right handles, and is a drive switch for transmitting rotational motion;
and a directional selection switch on the other handle for transmitting pivoting motion. 3. A push-type unicycle according to claim 1 or 2, wherein said drive wheel unit is controlled so as to operate only when both said drive switch and said direction selection switch are simultaneously inputted. 4. The manual push according to any one of claims 1 to 3, wherein the drive switch and the direction selection switch are arranged at positions where they can be input with a thumb when the grip is gripped. Formula unicycle.

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