WO2011074458A1

WO2011074458A1 - Two-wheeled wheelbarrow

Info

Publication number: WO2011074458A1
Application number: PCT/JP2010/072023
Authority: WO
Inventors: 金次齋藤; 諒祐村上
Original assignee: シビル安全機材株式会社
Priority date: 2009-12-14
Filing date: 2010-12-08
Publication date: 2011-06-23
Also published as: JP4942840B2; JP2011143914A

Abstract

Disclosed is a two-wheeled wheelbarrow that maintains balance more easily than a one-wheeled wheelbarrow, has a configuration which can be easily switched from an existing one-wheeled wheelbarrow to a two-wheeled structure, and which disposes a function that tilts the bed left or right upon the wheelbase, improving balance thereby. Two wheels at the underside of the front of the bed are separated to the left and right and supported upon an axle, the axle being supported by a support body that is orthogonal to the direction of movement of the bed. The wheels are supported to be freely rotatable about the axle. The support body comprises an axle bearing that is fixed in a position midway between the wheels upon the axle; a pair of left and right support arms disposed to descend from the bed; a linking shaft spanning the interval between the end portions of the pair of left and right support arms; and a support shaft whereupon a first linking part, which is attached facing downward from the linking shaft, and a second linking part, which is attached facing upward from the bearing, are rotatably mounted. It is thus possible for the support arms of the bed to incline up to a prescribed angle, treating the support shaft as a hub.

Description

Wheeled motorcycle

The present invention relates to a hand-held two-wheeled vehicle that transports luggage by hand.

Conventionally, as this type of wheelbarrow, for example, a wheeled unicycle as shown in FIGS. 20 and 21 is known. The unicycle 31 has a handle 35, a pair of

support arms

33, 33 is provided, and a wheel 34 is pivotally mounted between the pair of left and

right support arms

33, 33. The unicycle 31 is convenient for traveling in a narrow place and is widely used.

On the other hand, as such a hand-held type vehicle, various types of hand-held type two-wheeled vehicles having two wheels have been proposed. For example, the push-type two-wheeled vehicle of Patent Document 1 has a structure in which the width of the wheel can be adjusted by screwing the two left and right wheels into a screw portion whose directions are reversed and moving the wheel with respect to the screw portion. It has become. In the handcart transport vehicle of the literature 2, a wheel support frame is integrally arranged at an equal interval at the lower part of the mounting table, and two or one wheel is attached to the wheel support frame to switch between a two-wheeled vehicle and a one-wheeled vehicle. This is possible. The hand-held two-wheeled vehicle of the same document 3 is provided so that the axle for supporting the wheel can be tilted with respect to a support column that is suspended from the loading platform, and the grounding position of the two wheels is changed by changing the grounding angle of the wheel by the tilting of the axle. The interval is made wider or narrower. The hand-held two-wheeled vehicle of the same document 4 is provided with a tire support hardware for mounting wheels on a loading platform, and two or one tire is attached to the tire support hardware to switch between a two-wheeled vehicle and a one-wheeled vehicle. The handbag wheel for conveying rice bags in the document 5 has a two-wheeled vehicle structure provided with two wheels, and a receiving plate is provided at the front edge of the mounting plate. This wheelbarrow is made easy to load and unload rice bags by using this receiving plate.
Such a two-wheeled wheelbarrow is easier to balance than a one-wheeled wheelbarrow.

Furthermore, various push-type two-wheeled vehicles have been proposed that make it easier to balance by tilting the loading platform left and right on the two-wheeled vehicle. For example, in a motorcycle with a hand-held handle of the same document 6, an axle is mounted on a support member that is suspended from a load receiving base so that the seesaw motion is possible, and an X-shaped spring is provided between the load receiving base and the axle. Is provided. In this two-wheeled vehicle, the operation is stabilized by a spring. The hand-held two-wheeled vehicle of the literature 7 tries to maintain the balance of the vehicle body by connecting the carriage and the V-shaped pipe of the loading platform with a support shaft so that the loading platform is horizontal or inclined. The hand cart of the document 8 is provided with an arcuate frame between wheels, and an in-vehicle frame body is provided on the arcuate frame via a rolling wheel so that the in-vehicle frame body is swingably supported.

JP 2007-145215 A JP 2006-240326 A JP 2002-225715 A Registered Utility Model No. 3086239 JP 11-91573 A Registered Utility Model No. 3131612 JP 2004-168246 A Japanese Patent Laid-Open No. 11-20703

However, the wheelbarrow of the unicycle structure has a problem that it becomes difficult to balance the loading platform 32 when traveling with a large load placed on the loading platform or when the traveling surface is not flat.
On the other hand, the hand-held two-wheeled vehicles of Patent Documents 1 to 5 still have a problem that it is difficult to balance because the loading platform is inclined with respect to the ground.
On the other hand, the hand-held two-wheeled vehicle described in References 6 to 8 is easy to achieve a balance by tilting the loading platform to the left and right on the two-wheeled vehicle, but in either case, it has a structure for tilting the loading platform to the left and right on the motorcycle. It is specialized. Therefore, these two-wheeled vehicles cannot be used while remodeling an existing one-wheeled vehicle into a two-wheeled vehicle or switching between a two-wheeled vehicle and a one-wheeled vehicle.

The present invention has been developed to solve the above-mentioned problems, and the object of the present invention is a hand-held two-wheeled vehicle that is easier to balance than a single-wheeled vehicle. An object of the present invention is to provide a hand-held two-wheeled vehicle that can be switched and is provided with a platform on the wheel so that it can be tilted to the left and right for easy balancing.

In order to achieve the above-mentioned object, the invention according to claim 1 is provided in such a manner that two wheels are separated from each other on the axle supported by the support body at the front lower part of the loading platform in a direction orthogonal to the moving direction of the loading platform. The wheel is supported rotatably on the axle, the support is a bearing fixed to the middle position of the wheel of the axle, a pair of left and right support arms suspended from the loading platform, Rotating a connecting shaft passed between the ends of a pair of left and right support arms, a first connecting piece attached downward to the connecting shaft, and a second connecting piece attached upward to the bearing portion This is a hand-held two-wheeled vehicle that has a support shaft that can be pivotally attached, and that allows the support arm of the loading platform to tilt to a predetermined angle about the support shaft.

According to the second aspect of the present invention, the connecting shaft extended between the ends of the pair of left and right support arms of the support body has a predetermined length on the brackets respectively suspended from the ends of the pair of left and right support arms. This is a hand-held two-wheeled vehicle in which one end of each connecting plate is fixed with bolts and nuts, and a connecting shaft is inserted and fixed to the other end of the connecting plate.

The invention according to claim 3 is a hand-held two-wheeled vehicle in which the pair of left and right support arms are reinforced by connecting the ends of the reinforcing arms suspended from the front end of the loading platform.

According to a fourth aspect of the present invention, a mounting hole for fixing a bolt and nut is provided in the connecting plate, the mounting hole is formed as a long hole, and the connecting plate is movably provided with respect to the bracket. This is a hand-held two-wheeled vehicle that can be adjusted.

According to the first aspect of the present invention, a two-wheeled hand-held two-wheeled vehicle in which two wheels are separated from each other is supported, and a bearing unit in which a support is fixed to an intermediate position of the wheel of an axle, and a left-right unit suspended from a cargo bed A pair of support arms, a connecting shaft extending between the ends of the pair of left and right support arms, a first connecting piece attached downward to the connecting shaft, and a first attached to the bearing portion And a support shaft for pivotally mounting the two connecting pieces, and the support arm of the cargo bed can be tilted to a predetermined angle around the support shaft. It is a hand-held two-wheeled vehicle that is easy to remove, and it is possible to disassemble the existing unicycle structure and easily remodel it into a two-wheeled vehicle structure, or easily switch between a two-wheeled vehicle and a unicycle, and balance by tilting the loading platform on the wheels to the left and right Hand pushing that made it easier to take It is possible to provide a two-wheeled vehicle.

According to the second aspect of the present invention, the connecting shaft extended between the ends of the pair of left and right support arms of the support body is attached to the brackets respectively suspended from the ends of the pair of left and right support arms. Since one end of the length of the connecting plate is fixed with bolts and nuts, and the connecting shaft is inserted and fixed to the other end of this connecting plate, the connecting shaft is directly attached to the existing bracket according to the structure of the support arm of the loading platform. The mounting position can be moved backward by mounting or fixing one end of the connecting plate to the bracket with a bolt and nut, and inserting and fixing the connecting shaft to the other end of the connecting plate. Therefore, it is possible to provide a hand-held two-wheeled vehicle capable of appropriately changing the mounting position of the wheel according to the structure of the support arm of the cargo bed.

According to the invention of claim 3, since the support arm of the load carrier is reinforced by connecting the end of the reinforcement arm suspended from the front end of the load carrier to the tip thereof, the load carrier can be deformed even when the load carrier is tilted to the left or right. It has become possible to provide a hand-held two-wheeled vehicle that can prevent and withstand a large load.

According to the invention of claim 4, the connecting plate is provided with a fixing hole for fixing the bolt and nut, the connecting hole is provided as a long hole, the connecting plate is movable with respect to the bracket, and the wheel is adjusted back and forth with respect to the cargo bed. Therefore, it is possible to finely adjust the balance of the loading platform by finely adjusting the position of the wheel with respect to the loading platform.

1 is a front view showing a first embodiment of a hand-held two-wheeled vehicle according to the present invention. It is a side view of FIG. It is a longitudinal cross-sectional view of FIG. It is a front view which shows the state which inclined the loading platform in FIG. 1 to the right side. It is a front view which shows the state which inclined the loading platform in FIG. 1 to the left side. It is a front view which shows the state which one wheel of the hand-held type two-wheeled vehicle of FIG. 1 got on the level | step difference. It is a front view which shows 2nd Embodiment of the hand-held type motorcycle in this invention. FIG. 8 is a side view of FIG. 7. It is a longitudinal cross-sectional view of FIG. It is a front view which shows the state which inclined the loading platform in FIG. 7 to the right side. It is a front view which shows the state which inclined the loading platform in FIG. 7 to the left side. It is a front view which shows the state which one wheel of the hand-held type two-wheeled vehicle of FIG. 7 got on the level | step difference. It is a perspective view which shows the state which cut | disconnected the upper and lower sides of the support body part. It is a perspective view which shows the state which assembled | attached the upper and lower sides of the support body part. It is a perspective view which shows the state which assembled | attached the support body to the support arm. FIG. 16 is an exploded perspective view of FIG. 15. It is a perspective view which shows the state before attaching a 1st connection piece to a 2nd connection piece. It is a perspective view which shows the state which fitted the 1st connection piece in the 2nd connection piece. It is a perspective view which shows the state which assembled | attached the 1st connection piece to the 2nd connection piece. It is a front view which shows the conventional hand-held type two-wheeled vehicle. It is a side view of FIG.

DESCRIPTION OF SYMBOLS 11 Push-type two-wheeled vehicle 12 Loading platform 13

Support body

14,15 Wheel 16 Axle 17 Handle 21

Bearing part

22,23 Support arm 24 Connection shaft 25 1st connection piece 26 2nd connection piece 27 Support shaft 28

Step

29, 30 Reinforcement arm DESCRIPTION OF SYMBOLS 31 Push-type two-wheeled vehicle 32 Loading platform 33

Support body

34, 35 Wheel 36 Axle 37 Handle 41

Bearing part

42, 43 Support arm 44 Connection shaft 45 1st connection piece 46 2nd connection piece 47 Support shaft 48

Level difference

49, 50

Reinforcement arm

51, 52 Bracket 53 Connecting

plate

54, 55 Bolt nut

Hereinafter, preferred embodiments of the hand-held two-wheeled vehicle according to the present invention will be described in detail with reference to the drawings. 1 to 6 show a first embodiment of the hand-held two-wheeled vehicle of the present invention. 1 is a front view of a hand-held two-wheeled vehicle according to this embodiment, FIG. 2 is a side view of FIG. 1, FIG. 3 is a longitudinal sectional view of FIG. 1, and FIGS. FIG. 6 is a front view showing a state in which one wheel of the hand-held two-wheeled vehicle in FIG. 1 rides on a step.

1 to 3, the hand-held two-wheeled vehicle 11 includes a loading platform 12, and an axle 16 is supported on a support 13 at a lower front portion of the loading platform 12 in a direction orthogonal to the moving direction of the loading platform. Two

wheels

14 and 15 are attached to the left and right sides. These

wheels

14 and 15 are rotatably supported on the axle 16 and can be freely advanced and retracted by operating the handle 17 for pushing.

The support 13 includes a bearing portion 21 fixed to an intermediate position between the left and

right wheels

14 and 15 of the axle 16, a pair of left and

right support arms

22 and 23 suspended from the loading platform 12, and the pair of left and right support arms. The connecting shaft 24 extends between the

end portions

22 and 23. Then, the first connection piece 25 attached downward to the connection shaft 24 and the second connection piece 26 attached upward to the bearing portion 21 are pivotally attached to the support shaft 27 so as to be pivotable. The

support arms

22 and 23 can be tilted to a predetermined angle about the support shaft 27.

That is, as shown in FIGS. 4 and 5, the loading platform 12 can be freely tilted on the

wheels

14 and 15, so that it is tilted when unloading a load (not shown) from the loading platform 12 while ensuring stable traveling. You can lift this luggage without difficulty.
In addition, as shown in FIG. 6, even if any of the left and right wheels 14 to 15 rides on the step 28, the inclination can be absorbed without difficulty, so that the loading platform 12 can be placed horizontally even in uneven areas such as fields and farm roads. It is possible to drive stably while maintaining

The pair of left and

right support arms

22 and 23 that are suspended from the loading platform 12 are connected to the ends of reinforcing

arms

29 and 30 that are suspended from the front end of the loading platform 12, so that the loading platform 12 is tilted. However, since it is reinforced by the reinforcing

arms

29 and 30, the loading platform 12 is not deformed and can withstand a larger load. The pair of left and

right support arms

22, 23 suspended from the loading platform 12 is bent forward in the horizontal direction at the lower end portion thereof, and the

wheels

14, 15 are attached at this horizontal position. 22 and 23 can be tilted deeper.

When the hand-held two-wheeled vehicle 11 according to the first embodiment is provided, the wheel is removed from the pair of left and

right support arms

22 and 23 suspended from the loading platform 12 of the existing unicycle, and the first between the

support arms

22 and 23 is removed. The connecting piece 24 provided with the connecting piece 25 is attached.
A pair of

wheels

14 and 15 are pivotally attached to the left and right of the axle 16 and a second connecting piece 26 is attached to the bearing portion 21 on the axle 16 in advance.

Then, if the first connecting piece 25 attached downward to the connecting shaft 24 and the second connecting piece 26 attached upward to the bearing portion 21 are pivotally attached to the support shaft 27, the support of the loading platform 12 is supported. The hand-held two-wheeled vehicle 11 in which the

arms

22 and 23 can be tilted to a predetermined angle about the support shaft 27 is completed.
Of course, in order to change the hand-held two-wheeled vehicle 11 to a single-wheeled vehicle, disassembly / assembly may be performed in the reverse order of the above-described operation.

7 to 12 show a second embodiment of the hand-held two-wheeled vehicle according to the present invention. FIG. 7 is a front view of the hand-held two-wheeled vehicle according to this embodiment, FIG. 8 is a side view of FIG. 7, and FIG. 7 is a front view showing a state in which the loading platform is inclined, and FIG. 12 is a front view showing a state in which one wheel of the hand-held two-wheeled vehicle in FIG.

7 to 9, the hand-held two-wheeled vehicle 31 includes a loading platform 32, and an axle 36 is supported on a support body 33 at a lower front portion of the loading platform 32 in a direction orthogonal to the moving direction of the loading platform. Two

wheels

34 and 35 are attached to the left and right sides. These

wheels

34 and 35 are rotatably supported on an axle 36 and can be freely advanced and retracted by operating a handle 37 for pushing.

The support 33 includes a bearing portion 41 fixed to an intermediate position between the left and

right wheels

34 and 35 of the axle 36, a pair of left and

right support arms

42 and 43 suspended from the loading platform 32, and the pair of left and right support arms. And a connecting shaft 44 that is extended between the end portions of 42 and 43. In the hand-held two-wheeled vehicle according to the second embodiment, the connecting shaft 44 that is interposed between the ends of the pair of left and

right support arms

42 and 43 of the support 33 is connected to the pair of left and

right support arms

42 and 43. It can be attached to the

brackets

51 and 52 suspended from the end by appropriately changing the attachment position.

Thereby, for example, if one end of the connection plate 53 having a predetermined length is fixed to the

brackets

51 and 52 with the

bolt nuts

54 and 55, and the connection shaft 44 is passed and fixed to the other end of the connection plate 53, The mounting position of the shaft 44 can be shifted backward. More specifically, the ends of the reinforcing

arms

49 and 50 suspended from the front end of the loading platform 32 are connected to a pair of left and

right support arms

42 and 43 that are suspended from the loading platform 32. Since it is the front-end | tip of the

arms

42 and 43, or has shifted | deviated a little back, it can respond flexibly to such various structures. Further, in this embodiment, as shown in FIG. 8, the connecting plate 53 is provided on the rear side of the

brackets

51 and 52 and the mounting position of the connecting shaft 44 is shifted rearward. It is also possible to displace the connecting shaft 44 forward by providing it on the front side.

Therefore, first, the connecting shaft 44 can be directly attached to the

brackets

51 and 52 of the existing loading platform 32 according to the structure of the

support arms

42 and 43 of the loading platform 32. Further, one end of the connecting plate 53 is fixed to the

brackets

51 and 52 by

bolt nuts

54 and 55, respectively, and the connecting shaft 44 is passed and fixed to the other end of the connecting plate 53, thereby moving the mounting position backward. Is also possible.

Furthermore, in this embodiment, the connecting plate 53 is provided with a mounting hole 53a for fixing a bolt and nut, and this mounting hole 53a is formed as a long hole. The connecting plate 53 can be moved with respect to the

brackets

51 and 52 by the mounting holes 53 a, and the

wheels

34 and 35 can be adjusted back and forth with respect to the loading platform 32. For this reason, fine balance adjustment of the loading platform 32 can be performed by finely adjusting the positions of the

wheels

34 and 35. Moreover, if the connecting plate 53 and the mounting hole 53a are formed larger in the length direction, the adjustment amount of the

wheels

34 and 35 can be increased with respect to the loading platform 32.
As described above, a hand-held two-wheeled vehicle that can appropriately change the mounting positions of the

wheels

34 and 35 according to the structure of the

support arms

42 and 43 of the loading platform 32 can be provided.

Then, the first connecting piece 45 attached downward to the connecting shaft 44 and the second connecting piece 46 attached upward to the bearing portion 41 are pivotally attached to the support shaft 47, The

support arms

42 and 43 of the loading platform 32 can be tilted to a predetermined angle about the support shaft 47.

That is, since the loading platform 32 can be freely tilted on the

wheels

34 and 35 as shown in FIGS. 10 and 11, the loading platform 32 can be tilted without difficulty while lowering the load from the loading platform 32 while ensuring stable traveling. You can lift your luggage. In addition, as shown in FIG. 12, even if one of the wheels 34 to 35 rides on the step 48, the inclination can be absorbed without difficulty, so that the loading platform 32 can be kept horizontal even in uneven areas such as fields and farm roads. It is possible to drive stably while standing.

The pair of left and

right support arms

42 and 43 suspended from the loading platform 32 are connected to the ends of reinforcing

arms

49 and 50 suspended from the front end of the loading platform 32, so that the loading platform 32 is tilted. However, since it is reinforced by the reinforcing

arms

49 and 50, the loading platform 32 is not deformed and can withstand a larger load. The pair of left and

right support arms

42 and 43 that are suspended from the loading platform 32 are bent forward in the horizontal direction at the lower ends thereof, and the

wheels

34 and 35 are attached at this horizontal position. 42 and 43 can be tilted deeper.

When the hand-held two-wheeled vehicle 31 in the second embodiment is provided, the wheels are removed from the pair of left and

right support arms

42 and 43 suspended from the loading platform 32 of the existing unicycle, and the first between the

support arms

42 and 43 is removed. The connecting shaft 44 provided with the connecting piece 45 is attached.
That is, one end of a connecting plate 53 having a predetermined length is fixed to each of

brackets

51 and 52 suspended from the ends of a pair of left and

right support arms

42 and 43 with

bolt nuts

54 and 55, respectively. The connecting shaft 44 is inserted and fixed to the other end.
A pair of

wheels

34 and 35 are pivotally attached to the left and right of the axle 36, and a second connecting piece 46 is attached in advance to the bearing portion 41 on the axle 36.

A method of assembling the connecting shaft 44 to the support 33 will be described in detail with reference to FIGS.
As shown in FIG. 13, the first connecting piece 45 is attached to the connecting shaft 44 in advance. Since the connecting shaft 44 is formed at an end portion, a connecting plate 53 is attached to both sides by a nut 55 via a screw 44 a, so that the connecting shaft 44 is passed between the connecting plates 53. .

Subsequently, the connecting plate 53 is attached to the

brackets

51 and 52 suspended from the ends of the

support arms

42 and 43. In this case, the connecting plate 53 is mounted with the

bolt nuts

54 and 55 in a state where the mounting hole 53a is adjusted back and forth with respect to the positions of the

insertion holes

51a and 52a formed in the

brackets

51 and 52 and is adjusted to an arbitrary position. To.

Thus, the connecting shaft 44 is attached to the

brackets

51 and 52 on the loading platform 32 side via the connecting plate 53, and after the attachment, the first connecting piece 45 is suspended from the connecting shaft 44. . The attachment of the connecting shaft 44 to the connecting plate 53 and the connecting plate 53 to the

brackets

51 and 52 may be performed at the same time. In this case, the connecting

plates

53 and 53 are adjusted to the distance between the

brackets

51 and 52. The connecting shaft 44 can be attached, and the connecting shaft 44 can be fixed while preventing the connecting piece 45 from becoming uneven.

On the other hand,

wheels

14 and 15 are pivotally mounted on the left and right sides of the axle 36, and a bearing portion 41 is mounted on the axle 36, and a second connecting piece 46 is provided on the bearing portion 41. Yes. A hole 46a is formed in communication with the second connecting piece 46, and a support shaft 47 is detachably inserted into the hole 46a.

17, the first connecting piece 45 of the connecting shaft 44 is fitted into the second connecting piece 46. In FIGS. 18 and 19, the hole 46 and the communication hole 45a provided in the connecting piece 45 are provided. The first connecting piece 45 and the second connecting piece 46 are pivotally attached to each other by inserting and attaching the support shaft 47 to the shaft.
In this way, the hand-held two-wheeled vehicle 31 that can connect the loading platform 32 side and the axle 36 side and that can support the

support arms

42 and 43 of the loading platform 32 to a predetermined angle around the support shaft 47 is provided.

At this time, the position of the

wheels

34 and 35 relative to the loading platform 32 is moved to the rear side by the connecting plate 53 as compared with the case where the loading platform 32 is provided in the unicycle structure, and the loading platform 32 and the wheels 34 are connected via the mounting holes 53a. , 35 can be adjusted.
Of course, in order to change a hand-held two-wheeled vehicle to a unicycle, disassembly and assembly may be performed in the reverse order of the above-described operation.

As described above, the present invention has been described as a hand-held two-wheeled vehicle suitable for, for example, farm work, but it goes without saying that the present invention can be similarly applied to a hand-held two-wheeled vehicle used for other purposes.

Claims

A hand-held two-wheeled vehicle in which two wheels are supported on an axle supported by a support body in a direction orthogonal to a moving direction of the cargo bed at a lower front portion of the cargo bed, the wheels being the axle The support body includes a bearing portion fixed to an intermediate position of the wheel of the axle, a pair of left and right support arms suspended from the loading platform, and end portions of the pair of left and right support arms. A connecting shaft that is interposed therebetween, and a support shaft that pivotally attaches a first connecting piece attached downward to the connecting shaft and a second connecting piece attached upward to the bearing portion. A hand-held two-wheeled vehicle, characterized in that the support arm of the loading platform can be tilted to a predetermined angle about a support shaft.
One end of a connecting plate having a predetermined length is connected to a bracket that extends between the ends of the pair of left and right support arms of the support body, and is hanged from the ends of the pair of left and right support arms. The hand-held two-wheeled vehicle according to claim 1, wherein each is fixed with bolts and nuts, and the connecting shaft is inserted and fixed to the other end of the connecting plate.
2. The hand-held two-wheeled vehicle according to claim 1, wherein the pair of left and right support arms are reinforced by connecting an end portion of a reinforcement arm suspended from a front end of the loading platform to an end portion thereof.
An attachment hole for fixing the bolt and nut is provided in the connection plate, the attachment hole is formed as a long hole, the connection plate is movable with respect to the bracket, and the wheel is adjusted back and forth with respect to the cargo bed. The hand-held two-wheeled vehicle according to claim 2 provided so as to be possible.