JP2000272519A - Hand-push type carriage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily allow sure turn irrespective of a floor condition and a peripheral condition of a passage. SOLUTION: One face of a base table is used for a cargo mounting face in this carriage, and wheels 14, 15 are provided in front and rear sides of the other face 1 of the base table. The respective wheels 14, 15 are attached turnably to the base table. A steering mechanism is provided in the base table. A front-wheel steering direction transmitting mechanism transmits a steering variable of the steering mechanism to a front wheel 14 to control a direction of the front wheel 14. A rear-wheel steering direction transmitting mechanism transmits a steering variable of the steering mechanism to the rear wheel 15 to control a direction of the rear wheel 15. An operation switching mechanism for switching a wheel direction releases the transmission of the steering variable of the front wheel steering direction transmitting mechanism or the rear wheel steering direction transmitting mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hand truck. More specifically, the present invention relates to a hand-carrying vehicle that enables fine movement by determining the direction of wheels according to the steering amount of a steering wheel.

[0002]

2. Description of the Related Art A conventional hand-carrying cart of this type is known, for example, as shown in FIG. In other words, the hand-held transport vehicle 100 is configured such that one surface of the base 101 is used as the luggage loading surface 102 and the other surface 1
Wheels 104, 104 are provided in front of the base 03 and wheels 105, 105 are also provided behind the base 101. In addition, a base 101
A handrail 106 for hand pushing is vertically provided on the side of the mounting surface 102 and on the rear wheel 105 side. In the hand cart 100, usually, the rear wheels 105, 105
Are rotatably fixed to the wheel holders 107, 107, and the wheel holders 107, 107 are rotatably fixed to the base 101 by thrust bearing cases 108, 108. Further, in this hand-held carrier, the front wheels 104, 104 are fixed to the base 101 via fixing wheel holders 109.

[0003] According to such a hand truck, since the rear wheels 105, 105 are free wheels, it is possible to travel straight as shown in FIG.
The direction can be easily changed as shown in FIG.

[0004] In addition to the conventional hand-carriage truck 100 having the above-described structure, a conventional hand-carriage vehicle includes a light-cargo carrier having four wheels as free wheels as a carrier for carrying light loads. As a transport vehicle for transporting heavy objects, there is provided a heavy object transport vehicle that can be turned with a handle.

[0005] Since the light-weight transport cart 100 is a free wheel in all four wheels, it can be turned rapidly or freely.

[0006] In addition, the direction of turning of the heavy load carrier can be changed by a handle. Even in this case, the front wheels are generally fixed wheels.

[0007]

However, in the case of a conventional hand-carriage truck, for example, when the load is heavy, or when the passage 200 is narrow as shown in FIGS.
Alternatively, when a carpet is laid on the floor and there is resistance to wheels, there is a problem that the direction cannot be easily changed.

[0008] In a linen wagon car used in a hotel, for example, a carpet is laid on the floor, so that the wagon car itself may be difficult to push and not to hinder the passage of people. When moving near the wall side, the vehicle sometimes collides with the wall, and the expensive wall surface may be damaged.

[0009] Further, with respect to a trolley for transporting tableware or the like in a banquet hall or the like, there is also a problem that the plate is broken when colliding with a wall or the like for the above-mentioned reason.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the conventional problems and to provide a hand-carrying cart that can reliably and easily change directions regardless of the state of the floor or the surroundings of a passage.

[0011]

According to a first aspect of the present invention, there is provided a hand-carrying cart according to the first aspect of the present invention, wherein one surface of the base is a load-receiving surface, and the other surface of the base is another surface. In a hand-carriage truck having wheels before and after, each of the wheels is rotatably mounted on the base, and a steering mechanism provided on the base, and a steering amount of the steering mechanism is set to A front-wheel steering direction transmission mechanism that transmits to the wheels to control the direction of the front wheel, and a rear-wheel steering direction transmission mechanism that transmits the amount of steering of the steering mechanism to the rear wheel to control the direction of the rear wheel; A wheel direction operation switching mechanism for canceling the transmission of the steering amount of the front wheel steering direction transmitting mechanism or the rear wheel steering direction transmitting mechanism.

According to the first aspect of the invention, only the front wheels, only the rear wheels, or all the front and rear wheels can be controlled by operating the steering wheel of the steering mechanism by the wheel direction operation switching mechanism. The cart can be moved freely depending on the condition of the floor and the surroundings.

According to the second aspect of the present invention, the steering mechanism includes a steering wheel, a shaft for transmitting the movement of the steering wheel, a bearing for rotatably fixing the shaft, and a shaft provided on the shaft. And a wheel direction operating gear. Since the direction of the wheels can be moved by operating the handle, the cart can be moved in any direction.

According to the third aspect of the present invention, the front wheel steering direction transmitting mechanism is connected between the steering mechanism and a front wheel, and transmits a steering amount of the steering mechanism to a front wheel to transmit the steering amount to the front wheel. The direction of the wheels can be controlled, and the rear wheel steering direction transmission mechanism is connected between the steering mechanism and the rear wheel, and transmits the steering amount of the steering mechanism to the rear wheel to transmit the rear wheel. In which the direction can be controlled. By each direction transmission mechanism,
Since the operation amount from the steering mechanism can be transmitted to the wheels, the hand-held carrier can be moved in a desired direction.

According to a fourth aspect of the present invention, the wheel direction operation switching mechanism can cancel transmission of a steering amount of the front wheel steering direction transmitting mechanism or the rear wheel steering direction transmitting mechanism. It is assumed that. Therefore,
Only the front wheels depending on the direction of movement of the cart,
Since only the rear wheels or all the wheels can be controlled by the steering wheel, the direction control of the wheels can be selected according to the situation around the cart and the floor.

According to a fifth aspect of the present invention, the front wheel steering direction transmitting mechanism is connected between the steering mechanism and a front wheel by a combination of a rack and a pinion gear or a combination by a link mechanism. The steering amount of the mechanism can be transmitted to the front wheels to control the direction of the front wheels, and the rear wheel steering direction transmission mechanism is a combination of a rack and a pinion gear between the steering mechanism and the rear wheels, Alternatively, they are connected in a combination by a link mechanism so that the steering amount of the steering mechanism can be transmitted to the rear wheel to control the direction of the rear wheel.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

<First Embodiment> FIGS. 1 to 14 are views for explaining a first embodiment of the present invention.
Here, FIGS. 1 to 7 are views for explaining the structure of the hand-held carrier according to the embodiment of the present invention, and FIGS. 8 to 14 are views for explaining the use state of the hand-held carrier. It is.

First, the structure of the hand cart will be described with reference to FIGS. FIG. 1 is a perspective view showing the push cart, FIG. 2 is a side view showing the push cart, and FIG.
Is a plan view showing a front wheel steering direction transmission mechanism, a rear wheel steering direction transmission mechanism, and a wheel direction operation switching mechanism of the hand-push carrier,
4 is a side view showing each mechanism, FIG. 5 is a sectional view taken along line AA of FIGS. 3 and 4, FIG. 6 is a sectional view taken along line BB of FIG. 3, and FIG. FIG.

The cart 10 is shown in FIGS.
As shown in FIGS. 5 and 7, one surface of the base 11 is used as a luggage loading surface 12, and the other surface 13 of the base 11 is located on one end surface side in the long axis direction (hereinafter, referred to as “front”). In addition to providing the wheels 14 and 14 at predetermined intervals in the short axis direction, the base 11 has the other end face side in the long axis direction (hereinafter, referred to as the base 11).
The wheels 15 are provided at a predetermined interval in the short axis direction.

In this hand-held carrier 10, the front wheels 14, 14 are rollably fixed to wheel holders 16, 16. These wheel holders 16 are rotatably fixed to the base 11 by thrust bearings 17.

The rear wheels 15, 15 are also fixed to the wheel holders 18, 18 so as to roll. These wheel holders 18 are rotatably fixed to the base 11 by thrust bearings 19.

A wheel operation box 20 is provided behind the base 11, and a steering handle 21 is vertically provided on the upper surface of the wheel operation box 20. The wheel operation box 20 has a built-in steering mechanism 22 connected to a steering handle 21.

The steering mechanism 22 and the front wheels 14, 14
The front wheel steering direction transmitting mechanism 23 is connected between the front wheels 14 and 14 to transmit the steering amount of the steering mechanism 22 to the front wheels 14 and 14.
4 can be controlled.

The steering mechanism 22 and the rear wheels 15, 15
The rear wheel steering direction transmitting mechanism 24 is connected between the steering wheel 22 and the steering mechanism 22 in the same manner as described above.
Can be transmitted to the rear wheels 15, 15 to control the direction of the rear wheels 15, 15.

A front wheel steering direction transmitting mechanism 23 or a rear wheel steering direction transmitting mechanism 24 is provided on a rear side surface of the steering mechanism 22.
A wheel direction operation switching mechanism 25 for canceling the transmission of the steering amount is arranged.

Next, details of each mechanism will be described. First, as shown in FIG. 6, the steering mechanism 22 includes a steering wheel 21.
And a part of the steering handle 21 and the handle 2
1, a bearing (drive shaft) 27 for transmitting the amount of operation, bearings 28, 28 for rotatably fixing the support (drive shaft) 27 up and down in the drawing of the wheel operation box 20, and the support 2
7 and a wheel direction operation gear 29 provided at the lower end in the figure.

As shown in FIGS. 3, 4, 5 and 6, the front wheel steering direction transmitting mechanism 23 is
0, 31; a front wheel operation pinion gear 32; and front wheel direction control pinion gears 33, 33 fixed to the shafts of the wheel holders 16, 16, and are configured as follows.

That is, the front wheel operation connection bar 30 is a connection bar arranged in the longitudinal direction of the base 11. A rack 35 is formed on one side surface on one end side of the front wheel operation connection bar 30, and a lock groove 36 is provided on the other side surface. A rack 37 is formed on the other end side surface of the front wheel operation connection bar 30. The rack 35 of the front wheel operation connection bar 30 meshes with the wheel direction operation gear 29. Similarly, the rack 37 of the front wheel operation connection bar 30 is connected to the front wheel operation pinion gear 32.
It is designed to mesh with. The front wheel operation connecting bar 30 is movable between the front wheel operation pinion gear 32 and the guide roller 38 in the lateral direction in FIG. The front wheel operation connection bar 31 is a connection bar arranged in the short axis direction of the base 11. This front wheel operation connection bar 31
The rack 40 is provided on one side surface of the center portion of the vehicle, and the racks 41 and 42 are provided on one side surface of both end portions. The rack 40 of the front wheel operation connection bar 31 meshes with the front wheel operation pinion gear 32. Also,
The rack 41 of the front wheel operation connection bar 31 is adapted to mesh with the front wheel direction control pinion gear 33 on the upper side in the figure. The rack 42 of the front wheel operation connection bar 31 is adapted to mesh with the front wheel direction control pinion gear 33 on the lower side in the figure. The front wheel operation connection bar 31 includes guides 45, 46,
47. Note that the front wheel operation lock key 39 is fitted into the lock groove 36 of the front wheel operation connection bar 30 when the transmission of the operation amount is released. The rotation shaft 4 of the wheel holders 16
A front wheel direction control pinion gear 33 is fixed to 8.

On the other hand, as shown in FIGS. 3, 4, 5, and 6, the rear wheel steering direction transmitting mechanism 24 includes rear wheel operation connecting bars 50 and 51, a rear wheel operation pinion gear 52, and a wheel holder. Rear wheel direction control pinion gears 53, 53 fixed to the shafts 18, 18 are provided, and are configured as follows.

That is, the rear wheel operation connection bar 50 is a connection bar arranged in the longitudinal direction of the base 11. A rack 55 is formed on one side of one end of the wheel operation connection bar 50, and a lock groove 56 is provided on the other side. A rack 57 is formed on the other end side surface of the wheel operation connection bar 50. The rack 55 of the rear wheel operation connection bar 50 meshes with the wheel direction operation gear 29. Similarly, the rack 57 of the rear wheel operation connecting bar 50 is provided with a rear wheel operation pinion gear 52.
It is designed to mesh with. The rear wheel operation connecting bar 50 is movable between the rear wheel operation pinion gear 52 and the guide roller 58 in the lateral direction in FIG. The rear wheel operation connection bar 51 is a connection bar arranged in the short axis direction of the base 11. After this, the wheel operation connecting bar 51
A rack 60 is provided on one side surface of the center portion of the, and racks 61 and 62 are provided on one side surface of both end portions. The rack 60 of the rear wheel operation connecting bar 51 is adapted to mesh with the rear wheel operation pinion gear 52. Also,
The rack 61 of the rear wheel operation connection bar 51 is adapted to mesh with the rear wheel direction control pinion gear 53 on the upper side in the figure. The rack 62 of the rear wheel operation connection bar 51 is adapted to mesh with a rear wheel direction control pinion gear 53 on the lower side in the figure. The rear wheel operation connecting bar 51 includes guides 55, 56,
57. The front wheel operation lock key 59 is fitted into the lock groove 56 of the rear wheel operation connection bar 50 when the transmission of the operation amount is released. The rotation shaft 4 of the wheel holders 18, 18
9, a rear wheel direction control pinion gear 53 is fixed.

The wheel direction operation switching mechanism 25 includes a release plate 71
, The wheel direction operation switching lever 72 and the knock pin 73 as main components, and are configured as follows. That is, as shown in FIG. 7, the release plate 71 is provided with two inverted C-shaped grooves 74 and 75, and a wheel direction operation switching lever 72 is vertically provided at the upper part in the figure. The release plate 71 is rotatably attached to a side surface of the wheel operation box 20 by a fixed shaft 76. A knock pin 73 is provided above the fixed shaft 76 of the release plate 71, as shown in FIG. Release plate 7
In one groove 74, the front wheel operation connection bar 30 is provided with a release plate 71.
The rear wheel operation connection bar 50 is connected to each of the grooves 75. A groove 78 that allows the front wheel operation connection bar 30 to move in the illustrated lateral direction and a groove 78 that enables the rear wheel operation connection bar 50 to allow the illustrated lateral movement to be provided on the side surface of the wheel operation box 20. Each is drilled.

When the wheel direction operation switching lever 72 is tilted as shown in FIG. 8, the rear wheel operation connecting bar 50 is disengaged from the wheel direction operation gear 29, and the amount of steering to the rear wheel steering direction transmission mechanism 24 is reduced. Transmission can be canceled.

The wheel direction operation switching lever 72 is shown in FIG.
As shown in FIG. 1, the front wheel operation connecting bar 30 is disengaged from the wheel direction operation gear 29, so that transmission of the steering amount to the front wheel steering direction transmission mechanism 23 can be released.

A use state of the first embodiment having such a configuration will be described.

[In the case of controlling the direction of only the front wheel] In this case, as shown in FIG. 8, the knock pin 73 is removed, the wheel direction operation switching lever 72 is tilted to the left in the figure, and the knock pin 73 is inserted again. As a result, the rear wheel operation connection bar 50 moves in the direction of arrow m, and the rack 55 comes off the wheel direction operation gear 29. At this time, the lock groove 56 of the rear wheel operation connection bar 50 and the rear wheel operation lock key 59 are fitted to fix the rear wheels 15,15.

By pressing the steering wheel 21 without turning in such a state, the vehicle can go straight as indicated by an arrow p in FIG.

Further, by pushing the steering wheel 21 while turning it, it is possible to control the direction of turning in a small turn as shown by the arrow q in FIG.

[In the case of controlling the direction of the rear wheels only] In this case, as shown in FIG. 11, the knock pin 73 is removed, the wheel direction operation switching lever 72 is tilted rightward in the figure, and the knock pin 73 is inserted again. As a result, the front wheel operation connection bar 30 moves in the direction of arrow n, and the rack 35 comes off the wheel direction operation gear 29. At this time, the lock groove 36 of the front wheel operation connection bar 30 and the front wheel operation lock key 39 are fitted to fix the front wheels 14, 14.

In this state, by turning the steering wheel 21 backward without turning it, it becomes possible to control the direction of turning in a small turn as shown by the arrow r in FIG.

[When the direction of both front and rear wheels is controlled]
In this case, as shown in FIG. 7, the wheel direction operation switching lever 72 is set to the neutral position in the figure. As a result, both the rack 35 of the front wheel operation connection bar 30 and the rack 55 of the rear wheel operation connection bar 50 mesh with the wheel direction operation gear 29.

Thus, the operation amount of the steering wheel 21 is controlled by the front wheel operation connection bar 30 which moves in the lateral direction of FIG. 4 by the wheel direction operation gear 29 and the rack 35 meshing with the wheel direction operation gear 29 for the front wheel steering direction transmission mechanism 23. , This bar 30
Front wheel operating pinion gear 32 meshing with the rack 37 of
The rack 40 meshing with the pinion gear 32 causes the rack 40 shown in FIG.
The front wheel operation connecting bar 31 which moves in the up-down direction, is transmitted to the front wheels 14, 14 via front wheel direction control pinion gears 33, 33 meshing with the racks 41, 42 of the bar 31, and the direction is controlled. .

Similarly, the operation amount of the steering handle 21 is
The rear wheel steering direction transmission mechanism 24 includes a wheel direction operation gear 29, a rear wheel operation connection bar 50 that moves in the lateral direction in FIG. 4 by a rack 55 that meshes with the wheel direction operation gear 29, and a rear wheel operation pinion gear that meshes with a rack 57 of the bar 50. 52, a rear wheel operation connecting bar 51 which moves in the vertical direction of FIG. 4 by a rack 60 meshing with the pinion gear 52,
The direction is controlled by being transmitted to the front wheels 15, 15 via rear wheel direction control pinion gears 53, 53 meshing with the first racks 61, 62.

Therefore, when the steering wheel 21 is operated, for example, as shown in FIG. 13 (a), the operation amount is transmitted to the wheels 14, 14, 15, 15 as described above. The directions of the wheels 14, 14, 15, 15 are controlled as shown in FIG. As a result, the push cart 10 is pushed, and the push cart 10 is moved to the position shown in FIG.
From the position shown in FIG.
As shown in FIG. 3B, the hand-held carrier 10 can be brought into close contact with the wall 80.

Of course, by operating the steering wheel 21 as shown in FIG. 14A, the operation amount is transmitted to the wheels 14, 14, 15, 15 as described above. , Each wheel 14, 14, 15, 15
Is controlled as shown in FIG. As a result, the push cart 10 is pushed, and the push cart 10 is pushed.
14A is vertically moved from the position of FIG. 14A toward the wall 80, and the hand-carrying cart 10 can be brought into close contact with the wall 80 as shown in FIG.

According to the push cart 10 according to the first embodiment, the following advantages can be obtained.

(1) Steering of the steering wheel 21 enables a desired direction change.

(2) Since only the wheels on the desired side can be direction-controlled according to the moving direction of the bogie, a hand-carriage bogie with a small turn can be obtained irrespective of the state of the floor or the surroundings of the passage. it can.

(3) If all the wheels 14, 14, 15, 15 can be controlled by the steering wheel 21, they can be moved diagonally or laterally, and can be moved according to the surrounding conditions.

<Second Embodiment> FIG. 15 is a diagram for explaining a second embodiment of the present invention. The second embodiment differs from the first embodiment in that the direction control mechanism of the front wheels 14, 14 and the rear wheels 15, 15 is formed by a link. It is completely the same as that of the embodiment. That is, the steering mechanism 22 and the front wheel steering direction transmission mechanism 23 in the first embodiment
And the rear wheel steering direction transmitting mechanism 24 is constituted by a rack and a pinion gear. In the second embodiment, as shown in FIG. 15, the steering mechanism 22a and the front wheel steering direction transmitting mechanism 23a And rear wheel steering direction transmission mechanism 2
4a is constituted by a link mechanism. In the second embodiment, the same configuration as that of the wheel direction operation switching mechanism 25 in the first embodiment is employed.

More specifically, the steering mechanism 22a includes a steering handle 21, a column (drive shaft) 27 of the steering handle 21, and a bar 8 fixed to the column (drive shaft) 27.
Consists of one. Open grooves 82 and 83 are provided at both ends of the bar 81.
Is provided. These grooves 82 and 83 have an engaging body 8
4,85 are disengaged.

As shown in FIG. 15, the front wheel steering direction transmitting mechanism 23a is connected to the front wheel operation connecting bars 90a, 91a, the front wheel operation link 92a, and the rotating shafts of the wheel holders 16, 16 for the wheels 14, 14. It has fixed front wheel direction control links 93a, 93a, and is configured as follows. That is, the front wheel operation connection bar 90a is a connection bar arranged in the long axis direction of the base 11. An engagement body 84 is formed at one end of the front wheel operation connection bar 90a, and the bar 90a is provided with a fixing groove 94a. The other end of the front wheel operation connection bar 90a is engaged with a link 92a. Front wheel operation connection bar 91
a is a connecting bar arranged in the short axis direction of the base 11.
The center of the front wheel operation connection bar 91a is a link 92a.
It is connected to. In addition, this front wheel operation connection bar 91
The both ends of “a” are connected to the rotating shafts of the wheel holders 16, 16 via links 93 a, 93 a, respectively. Note that the fixing groove 94a and the front wheel operation lock key 39 are fitted to fix the front wheels 14, 14.

As shown in FIG. 15, the rear wheel steering direction transmitting mechanism 24a includes rear wheel operation connecting bars 90b, 91b, rear wheel operation links 92b, and rotating shafts of the wheel holders 17, 17 for the wheels 15, 15. And the rear wheel direction control links 93b, 93b fixed to the rear wheel, and are configured as follows. That is, the rear wheel operation connection bar 90b is a connection bar arranged in the long axis direction of the base 11. An engaging body 85 is formed at one end of the wheel operation connecting bar 90b, and the bar 90b is provided with a fixing groove 94b. Thereafter, the other end of the wheel operation connection bar 90b is engaged with the link 92b. Rear wheel operation connection bar 91
b is a connecting bar arranged in the short axis direction of the base 11.
After this, the center of the wheel operation connecting bar 91b is a link 92b.
It is connected to. Also, after this, the wheel operation connecting bar 91
Both ends of b are connected to the rotating shafts of the wheel holders 17, 17 via links 93b, 93b, respectively. Note that the fixing groove 94b and the rear wheel operation lock key 59 are fitted to fix the rear wheels 15,15.

According to the second embodiment, the same operation and effect as those of the first embodiment can be obtained.

Further, according to the second embodiment, since no gears or the like need be used, the configuration is simplified.

<Third Embodiment> FIGS. 16 and 17 are views for explaining a third embodiment of the present invention.
FIG. 16 is a perspective view showing the third embodiment, and FIG.
FIG. 7 is a diagram for explaining another configuration of the wheel direction operation switching mechanism.

The difference between the third embodiment and the first and second embodiments lies in the configuration of the wheel direction operation switching mechanism 25a. The description of the configuration is omitted.

In the first embodiment and the second embodiment, the wheel direction operation switching mechanism 25 is operated by hand, but in the third embodiment, the wheel direction operation switching mechanism 25a is replaced with the one shown in FIG. It is operated with the foot as shown in FIG.
That is, the pedal 95 is transmitted to the release plate 71 via the two links 96 and 97. In this case, the release plate 71 is not provided with a knock pin. The links 96 and 97 are loosely connected, and the pedal 9
The operation of No. 5 can be changed to the movement of the release plate 71 in the rotation direction by the rotation shaft 76.

According to such a third embodiment, the front wheels 14, 14 or the rear wheels 15, 14
There is an advantage that 15 direction controls are possible.

<Fourth Embodiment> FIGS. 18 and 19 are views for explaining a fourth embodiment of the present invention.
FIG. 18 is a front view showing the fourth embodiment, and FIG.
FIG. 9 is a cross-sectional view for explaining another configuration example of the steering mechanism.

The steering mechanism 22a according to the fourth embodiment shown in these figures is different from the steering mechanism 22a in that a stand 98 is provided and the steering handle 21a is like a control stick of an airplane as shown in FIGS. It is shaped and operated in the directions of the arrows X and Y in the figure, a point constituted by a drive shaft 27a instead of the column 27, and the rotating shaft of the steering handle 21a is formed by bearings 28a and 28a. The point that it is rotatably fixed and the point that the rotating shaft of the handle 21a and the drive shaft 27a are meshed with the bevel gears 99a and 99b are different from the first embodiment, and other configurations are the same. Description is omitted.

As described above, the steering wheel 21a according to the fourth embodiment can also be used for the wheel 1 as described above.
4, 14 and the direction of wheels 15, 15 can be controlled. According to the fourth embodiment, the handle operation is facilitated.

[0063]

As described above, the present invention has the following advantages.

(1) Steering of the steering wheel enables a desired direction change.

(2) Only the wheels on the desired side can be direction-controlled by the direction of movement of the truck, so that a hand-carriage truck with a small turn can be obtained regardless of the condition of the floor or the surroundings of the passage. it can.

(3) If all the wheels can be controlled by the steering wheel, the vehicle can be moved diagonally or laterally, and can be moved according to the surrounding conditions.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the same hand-held carrier in a first embodiment according to the present invention.

FIG. 2 is a side view showing the hand-held carrier in the embodiment.

FIG. 3 is a plan view showing a front wheel steering direction transmitting mechanism, a rear wheel steering direction transmitting mechanism, and a wheel direction operation switching mechanism of the hand-held carrier according to the embodiment.

FIG. 4 is a side view showing the respective mechanisms.

FIG. 5 is a sectional view taken along line AA of FIGS. 3 and 4 in the same embodiment.

FIG. 6 is a sectional view taken along line BB of FIG. 3 in the same embodiment.

FIG. 7 is a rear view of the wheel direction operation switching mechanism according to the embodiment.

FIG. 8 is a diagram showing an operation example of the wheel direction operation switching mechanism in the embodiment.

FIG. 9 is a diagram for explaining a use state of the hand-held carrier in the embodiment.

FIG. 10 is a diagram for explaining a use state of the hand-held carrier in the embodiment.

FIG. 11 is a diagram showing another operation example of the wheel direction operation switching mechanism in the embodiment.

FIG. 12 is a diagram for explaining a use state of the hand-held carrier in the embodiment.

FIG. 13 is a diagram for explaining a use state of the hand-held carrier in the embodiment.

FIG. 14 is a diagram for explaining a use state of the hand-held carrier in the embodiment.

FIG. 15 is a plan view showing a second embodiment of the present invention.

FIG. 16 is a perspective view showing a third embodiment of the present invention.

FIG. 17 is a diagram showing a configuration example of a wheel direction operation switching mechanism according to the third embodiment.

FIG. 18 is a front view showing an example of a steering handle according to a fourth embodiment of the present invention.

FIG. 19 is a sectional view showing another configuration example of the steering mechanism according to the fourth embodiment.

FIG. 20 is a perspective view showing a conventional hand-held carrier.

FIG. 21 is a diagram showing a use state of a conventional hand-held carrier.

FIG. 22 is a view for explaining the disadvantage of the use state of the conventional hand-held carrier.

FIG. 23 is a view for explaining still another point where the use state of the conventional hand-held carrier is disadvantageous.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 hand cart 11 base 12 luggage placing surface 13 other surface 14 front wheel 15 rear wheel 16, 18 wheel holder 17, 19 thrust bearing 20 wheel operation box 21, 21a steering handle 22, 22a steering mechanism 23 , 23a Front wheel steering direction transmission mechanism 24, 24a Rear wheel steering direction transmission mechanism 25, 25a Wheel direction operation switching mechanism

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3D030 DC39 3D034 AA01 BA01 BB03 CA01 CB03 CC11 CC16 3D050 AA01 BB02 DD01 EE08 EE15 GG00 KK03

Claims (5)

[Claims] 1. A hand cart having one surface of a base as a load-carrying surface and wheels provided before and after the other surface of the base, wherein each wheel is rotatable with respect to the base. A steering mechanism provided on the base, a front wheel steering direction transmitting mechanism for transmitting a steering amount of the steering mechanism to the front wheel to control a direction of the front wheel, and steering the steering mechanism. A rear wheel steering direction transmission mechanism for transmitting the amount to the rear wheel to control the direction of the rear wheel; and a wheel direction operation for canceling the transmission of the steering amount of the front wheel steering direction transmission mechanism or the rear wheel steering direction transmission mechanism. A hand-held carrier having a switching mechanism. 2. The steering mechanism includes a steering wheel, a shaft for transmitting the movement of the steering wheel, a bearing for rotatably fixing the shaft, and a wheel-direction operating gear provided on the shaft. The hand-carrying cart according to claim 1, wherein the cart is configured. 3. The front wheel steering direction transmission mechanism is connected between the steering mechanism and a front wheel, and transmits a steering amount of the steering mechanism to a front wheel to control the direction of the front wheel. The rear wheel steering direction transmission mechanism is connected between a steering mechanism and a rear wheel, and transmits a steering amount of the steering mechanism to a rear wheel to control the direction of the rear wheel. The hand-carrying cart according to claim 1, characterized in that the cart can be moved. 4. The system according to claim 1, wherein the wheel direction operation switching mechanism is capable of releasing the transmission of the steering amount of the front wheel steering direction transmitting mechanism or the rear wheel steering direction transmitting mechanism. Hand truck. 5. The front wheel steering direction transmission mechanism is connected between the steering mechanism and a front wheel by a combination of a rack and a pinion gear or a combination of a link mechanism. To control the direction of the front wheels by transmitting to the rear wheels, the rear wheel steering direction transmission mechanism is a combination of a rack and a pinion gear between the steering mechanism and the rear wheels, or a combination of link mechanisms. 4. The cart according to claim 3, wherein a steering amount of the steering mechanism is transmitted to a rear wheel to control a direction of the rear wheel.