JPH1120703A - Pushcart - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pushcart whose balance cannot be lost by keeping mounted loads horizontally even if a frame is tilted when it is used on an uneven road or on a road face tilted to one side. SOLUTION: The subject device is provided with a pair of left and right wheels 2, 2, and in a frame type frame 1 provided with a handle 3 in the rear part, arc type supporting levers 4 curved downward are arranged at fixed intervals in the longitudinal direction. On the inside of the frame 1, a mounting frame body 5 provided with rotational wheels 6 rotating on the arc type supporting levers 4 is arranged, and the mounting frame body 5 is supported freely oscillationally via the rotational wheels 6, so that the mounting frame body 5 can be kept in a horizontal condition in spite of the inclination of the frame 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cart and, more particularly, to one or a plurality of containers or the like containing agricultural products or other goods, and has a bumpy road surface or an inclined road surface. The present invention relates to a hand-carriage vehicle that can be carried by hand while maintaining a good balance.

[0002]

2. Description of the Related Art Heretofore, there has been a hand truck capable of loading and easily transporting containers and the like containing agricultural products and various articles.

[0003] For example, farmers and the like often store harvested vegetables and fruits in containers, and transport them from the harvest location to a conveyor device for transportation or a stopped truck or the like using such a hand truck. .

[0004] The configuration of a hand-carriage vehicle is a rear car type in which a pair of left and right wheels are provided on a frame having a container mounting portion and a hand-held handle is continuously provided at the rear end of the frame, or a unicycle provided with one tire. Types were common.

[0005]

However, the above-mentioned conventional carts have the following problems to be solved.

[0006] That is, the unicycle type is small and has a small turn, but has poor stability, and is extremely difficult to handle for those who are not used to it.

On the other hand, the rear car type can take a large amount of load and is much more stable than the unicycle type. However, when the objects to be transported are agricultural products, the ridges and the agricultural roads have many irregularities. When the cart was passed by a hand truck on an uneven road, the cart swung to the left and right, and at the same time, the loaded containers also swung to the left and right, which was unstable. This is especially true when the container accommodates heavy objects such as watermelon or when a plurality of containers are stacked.

[0008] In many cases, such as mandarin orange fields pass on a slope, the transport vehicle must be transported in an inclined state.
In order to support an unstable carrier, a heavy burden is placed on the user's arm. Therefore, depending on the case, there is a possibility that the container may roll over without being supported, or the loaded container or the contents in the container may be dropped from the transport vehicle.

[0009] An object of the present invention is to provide a push cart capable of solving the above problems.

[0010]

In order to solve the above-mentioned problems, according to the present invention, a pair of left and right wheels are provided, and a frame-like frame provided with a handle at a rear portion is provided with a lower portion. A curved arc-shaped support rod is erected at regular intervals in the front and rear, and a loading frame provided with a rolling wheel that rolls on the arc-shaped support rod is disposed inside the frame, and via the rolling wheel. Thus, the loading frame is swingably supported so that the loading frame can be maintained in a horizontal state regardless of the inclination of the frame.

Further, in the present invention, the pair of left and right wheels is arranged outside a frame.

According to the present invention, the pair of left and right wheels is disposed inside a frame.

According to the present invention, the arc-shaped support rod is provided with a stopper which comes into contact with a rolling wheel and regulates a swing amount of the loading frame.

Further, according to the present invention, the frame is provided with a rocking lock mechanism for supporting and fixing the loading frame.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention comprises a pair of left and right wheels and a downwardly curved arc-shaped support rod which is provided at regular intervals in a frame-like frame provided with a handle at the rear. A loading frame having a rolling wheel rolling on the arc-shaped support rod is arranged inside the frame, and the loading frame is swingably supported via the rolling wheel to form a frame. Regardless of the inclination, the loading frame can be maintained in a horizontal state.

That is, when the vehicle leans on a road with a lot of bumps or a sloping ground, and one of the wheels falls down or gets on, and the frame is tilted, the arc-shaped support rod also tilts similarly to the frame. Is supported by the arc-shaped support rods via the rolling wheels mounted on the vehicle, so that the rolling wheels relatively roll on the arc-shaped support rods and swing, so that the loading frame maintains a horizontal posture. be able to.

Therefore, since the position of the center of gravity of the load such as the loaded container does not change, the balance of the entire transport vehicle including the load is not lost, and the arm pushed by the hand to maintain the balance is extremely large. Since it does not place a heavy burden, it can be carried easily and the work efficiency is improved.
In this way, the transport worker can carry out the transport operation safely without worrying about unevenness or inclination.

Incidentally, the pair of left and right wheels may be arranged outside the frame to be configured as a rear car type, or may be provided inside the frame with a small tread distance.

That is, in the rear car type, the center of gravity can be lowered by lowering the height of the frame. However, the application of the hand cart is mainly used in a narrow road such as a ridge. For example, a type in which the distance between treads is reduced is easy to use.

In addition, since it is composed of a pair of wheels, it is easy to handle with stability, unlike a unicycle, and, unlike a roller type having a wide contact surface, it can be turned around one contact surface when turning. So it's easy to turn around.

In this case, in order to avoid interference between the loading frame and the wheels, it is necessary to increase the height of the frame in accordance with the diameter of the wheels, and the position of the center of gravity is higher than that of the rear car type. However, there is no change to the configuration in which the loading frame is maintained horizontally, the balance is good, and there is no risk of falling over, and the transport can be carried out safely and smoothly.

Further, it is preferable that the arc-shaped support rod is provided with a stopper which comes into contact with the rolling wheel and regulates the swing amount of the loading frame.

That is, the rolling wheel is rotatably mounted on the loading frame via a mounting bracket. However, if the swinging amount is too large, one of the rolling wheels causes the end portion of the arc-shaped support rod to move. Since there is a risk of passing through the lowermost point of the arc-shaped support rod, a stopper made of a member having elasticity with a width corresponding to the swing amount of the loading frame is attached to both sides of the lowermost point of the arc-shaped support rod. is there.

With this stopper, it is possible to prevent the rolling wheels from dropping off the frame and the support of the loading frame from coming off.

Further, the frame can be provided with a rocking lock mechanism for supporting and fixing the loading frame. When the loading frame is used on a flat road, the loading frame is fixed in a horizontal state and a normal transport vehicle is used. Can be used like

As described above, according to the present invention, even when used on uneven roads or on roads with one side sloping, the load can be maintained in a horizontal state, so that the balance is good and the transportation can be performed safely. it can. Since the balance is good, containers and the like can be stacked and used, so that the transportation efficiency is improved.

[0027]

【Example】

(First Embodiment) Hereinafter, a first embodiment of the present invention will be described with reference to the accompanying drawings.
An embodiment will be described.

FIG. 1 is a front view of a cart A according to a first embodiment, FIG. 2 is a plan view thereof, FIG. 3 is a left and right side view thereof, FIG. 4 is a rear view thereof, and FIG. 6 is an exploded perspective view of the same.

As shown in FIG. 1, a hand truck A according to the present embodiment transports one to three containers C capable of storing vegetables, fruits and the like in parallel, and further stacks them thereon. It is possible.

Reference numeral 1 denotes a frame formed in a rectangular frame shape.
At the outer side of the side frames 10 and 11 of the frame 1, wheels 2 and 2 with a pair of left and right tires are mounted.
A handle 3 extending diagonally upward is continuously provided from both ends of the rear frame 12, and furthermore, a pipe-shaped arc-shaped support rod 4, which is bent downward at a predetermined interval in the front-rear direction of the frame 1.
4 is installed between the side frames 10 and 11. 20 is an axle.

Reference numeral 5 denotes a rectangular loading frame on which three containers C can be placed. The loading frame 5 is disposed inside the frame 1 as shown in FIG. Frame part 5
Two rolling wheels 6, 6 that roll on the arc-shaped support rods 4, 4 are attached to the respective 0,51 (see FIGS. 2 and 5).

That is, the loading frame 5 is swingably supported on the arc-shaped support rods 4, via these four rolling wheels 6, 6, 6, 6. Regardless, the loading frame 5 can be maintained in a horizontal state.

For example, when the cart A is used on an uneven road or an inclined road, as shown in FIG. 8, it is assumed that one wheel 2 sinks and the other wheel 2 floats. The frame 1 is also inclined, but the loading frame 5 swings by the rolling wheels 6, 6, 6, 6 relatively rolling on the arc-shaped support rods 4, 4 in response to this inclination. As a result, the horizontal state is maintained.

As described above, the arc-shaped support rod 4 made of a pipe is used.
Since the loading frame 5 is supported on the upper side via the rolling wheel 6, the loading frame 5 can be kept horizontal regardless of the inclination of the frame 1, and the center of gravity of the loaded container C is Since there is no change, the balance of the entire cart A including the container C is not lost, and the transporter can carry out the transport operation safely without worrying about unevenness or inclination.

Further, since the container C is always kept in a horizontal state, there is no possibility that the container C will fall even if the container C is packed with the heaps of agricultural products or the like substantially in a heap.

Numeral 7 denotes a stopper provided on the arc-shaped support rod 4, which restricts the swing amount of the loading frame 5 by coming into contact with the rolling wheels 6.

That is, each rolling wheel 6 is rotatably mounted on the loading frame 5 via the mounting bracket 60. However, if the swing amount is too large, one rolling wheel 6 is supported in an arc shape. There is a risk that the rod 4 will pass through the end and separate. Therefore, on both sides of the lowermost point of the arc-shaped support rod 4,
The stopper 7 is provided with a width corresponding to the swing amount of the loading frame 5. In this embodiment, the maximum swing angle of the loading frame 5 is restricted to 10 degrees for each of the left and right sides. 70 is a stopper mounting member.

The stopper 7 is preferably made of elastic rubber or the like in order to reduce a shock at the time of collision between the rolling wheel 6 and the stopper 7. By providing the stopper 7 in this manner, there is no possibility that each rolling wheel 6 falls off the frame 1 and the support of the loading frame 5 is released.

The frame 1 can be provided with a swing lock mechanism B for supporting and fixing the loading frame 5.

That is, the swing lock mechanism B is used to fix the loading frame 5 in a horizontal state so that the cart 4 can be used like an ordinary cart when the cart A is used on a flat road. In this embodiment, as shown in FIG.
It is provided on the rear frame 12 of the frame 1.

Reference numerals 14, 14 denote pin insertion holes provided in the rear frame 12. Lock pins 8, 8 are inserted into the insertion holes 14, 14 by springs 8.
The base ends of the lock pins 8, 8 are connected to a connecting plate 82 which is advanced and retracted by an operation lever 81.

The base end portion 83 of the operation lever 81 is formed in a cam shape, and the base end portion 83 is pivotably supported.

Therefore, as shown in FIG. 9 (a), the cam-shaped base portion 83 presses the connecting plate 82 by the turning operation of the operating lever 81, and the lock pin 82 is pressed against the springs 80,80.
The end portions of the frames 8 and 8 are pushed in until they reach the lower portion of the loading frame 5, and the swing of the loading frame 5 is locked.

As shown in FIG. 9B, when the operation lever 81 is rotated in the reverse direction, the lock pins 8, 8 are retracted by the bias of the springs 80, 80, and the loading frame 5 is moved. It is free.

Here, another configuration of the cart A according to the present embodiment will be described. In FIGS. 1 to 6, reference numerals 15 and 16 denote a rear stopper and a front stopper.
In order to prevent the loading frame 5 from coming off, it is provided on the rear frame 12 and the front frame 13 of the frame 1.

As shown in FIG. 10, the front stopper 16 is a pin insertion hole of a mounting piece 16a mounted at the center of the front frame 13.
A retaining pin 16d provided with a roller body 16e at the tip thereof is attached to 16b via a spring 16c, and the retaining pin 16d is configured to be able to advance and retreat.The rear stopper 15 has a roller body 15e at the tip. The provided retaining pin 15d is fixed to the mounting piece 15a.

On the other hand, arc-shaped engaging pieces 52, 52 are continuously provided on the front and rear end faces of the loading frame 5, and the engaging pieces 52, 52 dispose the loading frame 5 in the frame 1. When installed, as shown in FIG. 7, the retaining pins 15d, 16d are located in the gaps between the upper surfaces of the front and rear frames 13, 12 of the frame 1.

Therefore, when disposing the loading frame 5, first, the engaging piece 52 on the rear end side is inserted between the retaining pin 15 d of the rear retaining member 15 and the rear frame 12. Then, the rear rolling wheels 6, 6 are mounted on the arc-shaped support rod 4, and then the retaining pins 16d of the front stopper 16 are retracted, and the front rolling wheels 6, 6 are mounted on the arc-shaped support rod 4. The retaining pin 16d is advanced by the spring 16c, and the engaging piece 52 on the front end side of the loading frame 5 is also positioned in the gap between the retaining pin 16d and the front frame 13. When removing the loading frame 5, the above procedure may be reversed.

As described above, since the loading frame 5 is detachable (refer to FIG. 6), the frame 1 or the loading frame 5 can be individually maintained, and the maintenance and management are easy. is there.

Reference numerals 17 and 17 denote legs, which are formed in a V-shape on both sides of the rear end of the frame 1.
Since containers 2 and 2 are grounded and installed on the ground in a stable state, loading and unloading of container C is safe.

(Second Embodiment) Next, a cart A 'according to a second embodiment will be described. FIG. 11 is a front view of a transport vehicle A 'according to the second embodiment, and FIG. 12 is a plan view of the same.

The difference between the cart A 'according to the present embodiment and the cart A according to the first embodiment lies in the position of the wheels 2,2. In the present embodiment, a pair of right and left wheels 2,2 is provided. 2 is located inside the frame 1.

That is, as shown in FIGS. 11 and 12, a support member 25 is installed between the side frames 10, 11 of the frame 1 at a substantially intermediate position between the arc-shaped support rods 4, and the support member 25 is Two axle bearings 26, 26 are suspended from the inner side, and a pair of wheels 2, 2 is mounted between the axle bearings 26, 26 via an axle 27. Note that the support member 25 is located below the lower surface of the frame 1 so as not to interfere even at the position where the loading frame 5 swings at the maximum.

As described above, the hand-held carrier according to the present embodiment.
A ′, as in the first embodiment, maintains a good balance by maintaining the load such as the container C horizontal even when operating on an uneven road or a one-sided inclined road, and places a large burden on the arm to be pushed. It has a great effect that it will not be worn, and since the distance between the treads of the wheels 2, 2 is extremely small, it is suitable for operation on narrow road surfaces such as ridges, and also has high running stability unlike unicycles Easy to handle.

Further, at the time of turning or the like, only one of the wheels 2 is brought into contact with the ground so that it can be turned.

As a modification of the present embodiment, the distance between the treads of the wheels 2, 2 is slightly increased to improve the running stability (see FIGS. 13 and 14). It is possible to improve the straightness by attaching in the shape of a triangle. The distance between the treads may be determined in consideration of the width of the operating ridge or the like.

The other structure of this embodiment is substantially the same as that of the first embodiment. However, since the wheels 2, 2 are disposed inside the frame 1, the height of the ground of the frame 1 is high. Accordingly, the length of the leg 17 'is also increased. In this embodiment, the legs 17 'are provided in a W-shape at the center of the rear frame 12 of the frame 1. However, the legs 17' may be provided separately on the left and right ends of the rear frame 12 as in the first embodiment. Is natural.

(Third Embodiment) Next, a hand cart A ″ according to a third embodiment will be described. FIG. 13 is a plan view of a transport vehicle A ″ according to the third embodiment, and FIG. 14 is a side view thereof.

A push cart A ″ according to the present embodiment is obtained by adding a pair of left and right rear wheels W, W to the modification of the above-described second embodiment A ′. As described above, since the vehicle is grounded by the four wheels, the stability is further improved, and the vehicle can be operated without lifting the handle 3, thereby reducing the burden of transportation.

In the present embodiment, the rear wheels W, W
Are provided independently, but the front side (wheel 2,2)
Similarly, they may be mounted on a common axle.

As another embodiment, a pair of left and right rear wheels is provided.
Instead of W, W, a single tail wheel can be attached.

Further, in each of the embodiments, the size and shape of the handle 3 and the like may be appropriately changed.

As described above with reference to each embodiment, according to the present invention, the position of the center of gravity of a load such as a container loaded during transportation does not change, and the balance of the entire transport vehicle including the load is lost. Because there is no, workers can carry safely without worrying about unevenness and inclination,
In order to maintain the balance, a great deal of load is not applied to the arm to be pushed, so that the carrying operation becomes easier and the working efficiency is improved.

[0064]

The present invention is embodied in the form described above and has the following effects.

According to the first aspect of the present invention, a downwardly curved arc-shaped support rod is mounted on a frame-shaped frame having a pair of left and right wheels and a handle provided at a rear portion thereof at predetermined intervals in the front-rear direction. A loading frame having a rolling wheel that rolls on the arc-shaped support rod is disposed inside the frame, and the loading frame is swingably supported via the rolling wheel, Regardless of the inclination of the load, the loading frame can be maintained in a horizontal state, so the center of gravity of the load such as loaded containers does not change, and the balance of the entire transport vehicle including the load may be lost. Absent. Therefore, the transporter can carry out the transport safely without worrying about unevenness and inclination, and does not place a great burden on the arm to push by hand in order to maintain the balance, which makes the transport work easier and improves the work efficiency. improves.

According to the second aspect of the present invention, by disposing the pair of left and right wheels outside the frame, in addition to the above-described effects, stability during transportation work is increased and safety is enhanced.

According to the third aspect of the present invention, by arranging the pair of left and right wheels inside the frame, in addition to the above-described effects, the distance between the treads is reduced, and the operation on narrow ridges and the like is facilitated. I can do it.

According to the fourth aspect of the present invention, in addition to the above and / or effects, the arc-shaped support rod is provided with a stopper which abuts on the rolling wheel to regulate the swing amount of the loading frame. The frame can be prevented from coming off the frame, and the safety can be further improved.

According to the fifth aspect of the present invention, by providing the frame with a swinging lock mechanism for supporting and fixing the loading frame, in addition to the above effects, the loading portion is integrated with the frame. Can also be used selectively as a transport vehicle.

[Brief description of the drawings]

FIG. 1 is a front view of a hand truck according to a first embodiment.

FIG. 2 is a plan view of the same.

FIG. 3 is a left and right side view of the same.

FIG. 4 is a rear view of the same.

FIG. 5 is a bottom view of the same.

FIG. 6 is an exploded perspective view of the same.

FIG. 7 is an explanatory view showing a supporting state of the loading frame.

FIG. 8 is an explanatory view showing a tilting state of the loading frame.

FIG. 9 is an explanatory view of a swing lock mechanism.

FIG. 10 is an explanatory view of a stopper.

FIG. 11 is a front view of a push cart according to a second embodiment.

FIG. 12 is a plan view of the cart.

FIG. 13 is a plan view of a hand truck according to a third embodiment.

FIG. 14 is a side view of the cart.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS A Hand cart B Swing lock mechanism C Container 1 Frame 2 Wheel 4 Arc-shaped support rod 5 Loading frame 6 Rolling wheel 7 Stopper

Claims (5)

[Claims] 1. A frame-like frame (1) having a pair of left and right wheels (2), (2) and a handle (3) at the rear.
Then, downwardly curved arc-shaped support rods (4), (4) are erected at regular intervals in the front and rear, and inside the frame (1), the arc-shaped support rods (4), (4) Rolling rolling wheels (6), (6), (6), (6)
The loading frame body (5) equipped with the rolling wheels (6), (6),
The loading frame (5) is swingably supported via (6), (6), and regardless of the inclination of the frame (1), the loading frame (5)
A hand-held transport vehicle characterized in that it can be maintained in a horizontal state. 2. A pair of left and right wheels (2), (2)
2. The cart according to claim 1, wherein the cart is disposed outside of (1). 3. A pair of left and right wheels (2), (2)
2. The cart according to claim 1, wherein the cart is arranged inside (1). 4. A stopper for abutting the arc-shaped support rods (4), (4) on a rolling wheel (6) to regulate the amount of swing of the loading frame (5).
The cart according to any one of claims 1 to 3, wherein (7) is provided. 5. A manual pusher according to claim 1, wherein said frame (1) is provided with a swing lock mechanism (B) for supporting and fixing said loading frame (5). Haul truck.