JP7335004B2 - Wheelbarrow - Google Patents

Description

The present invention relates to wheelbarrows such as silver cars and walkers.

This type of handcart includes left and right steering frames that extend downward from a steering unit that is steered by a user with both hands. left and right rear wheel legs which are rotatably supported at the lower end of each steering frame about a horizontal axis extending in the left-right direction and which support the rear wheels in a rollable manner; and upper ends of the respective rear wheel legs. Upper and lower connection frames are provided to connect the parts and the lower ends to each other.

Further, in such a handcart, there is conventionally known one in which a storage basket for storing luggage is provided between the front wheel legs (see Patent Document 1). The lower connecting frame protrudes forward in a convex shape, and left and right rear end frames extending vertically from both the left and right rear end positions of the storage basket are provided at both the left and right positions of the front end of the lower connecting frame. is fixed at the bottom.

JP 2020-32917 A

However, in the conventional one, since the lower ends of the left and right rear end frames are fixed to the left and right positions of the front end portion of the lower connecting frame projecting forward, the rear end position of the storage basket is lowered. It is determined according to the amount of forward protrusion of the connecting frame on the side. Therefore, the rear end position of the storage basket cannot be positioned forward or rearward from the front end portion of the lower connecting frame, and the layout of the storage basket is restricted.

SUMMARY OF THE INVENTION The present invention has been made in view of this point, and its object is to prevent the rear end position of the storage basket from being determined according to the amount of forward projection of the lower connecting frame. To provide a handcart capable of expanding the layout of a storage basket.

In order to achieve the above object, in the present invention, left and right steering frames extend downward from a steering portion which a user steers with both hands, and the steering frames are connected to the lower ends of the steering frames so that the front wheels can roll freely. Left and right front wheel legs supported by the steering frame, left and right rear wheel legs connected to the lower ends of the steering frames and rotatably supporting the rear wheels, upper end portions and lower end portions of the respective rear wheel legs and upper and lower connecting frames for connecting the respective rear wheel legs and the front wheel legs to each other, and each of the rear wheel legs and the front wheel legs can be folded from an open position to a closed position about a horizontal axis extending in the left-right direction. Assuming a car. Further, a storage basket for storing luggage is provided between the front wheel legs, and left and right rear end frames extending in the vertical direction are provided at both left and right rear end positions of the storage basket. In addition, at the upper and lower ends of each of the rear end frames, the rear ends of the left and right upper end side frames and the lower end side frames that extend in the front-rear direction respectively extend from the left and right ends of the upper and lower edges of the storage basket. It is rotatably supported around a horizontal axis. Each of the rear end frames has its upper end fixed to both left and right positions of the upper connecting frame, while its rear end is fixed to the lower part of each rear wheel leg, and left and right lower ends extend forward. Each lower part is fixed only to the front end of the frame, and the rear wheel legs and the lower end frames form a substantially triangular rigid body that cannot be deformed when viewed from the side.

Further, left and right connecting links are provided between the front wheel legs and the rear wheel legs, and the front wheel legs and the rear wheel legs are arranged to be centered when the front wheel legs and the rear wheel legs are folded. A folding front link member and a rear link member are provided. The front ends of the front link members are rotatably supported by the lower portions of the front wheel legs about a horizontal axis extending in the left-right direction, and the rear ends of the front link members are positioned in the middle of the front-rear link members in the front-rear direction. It is rotatably supported around a horizontal axis extending in the direction. On the other hand, the rear ends of the rear link members are supported by the lower portions of the rear wheel legs so as to be rotatable about horizontal axes extending in the left-right direction, and the front ends of the rear link members are supported by the lower end side frame of the storage basket. The rear link members may be supported rotatably around a horizontal axis extending in the left-right direction and slidable in the longitudinal direction of the respective rear link members.

Further, the seat surface on which the user can sit may be rotatably supported on the upper end of each of the rear end frames about a horizontal axis extending in the left-right direction.

Further, the connecting frame on the lower side of each of the rear wheel legs projects forward in a convex shape, and the lower end of each of the rear end frames is placed in a non-contact state with both the left and right front end positions of the lower connecting frame. may be positioned directly above both the left and right front end positions of the lower connecting frame.

In short, the left and right ends of the upper and lower edges of the storage basket are attached to the upper and lower ends of the left and right rear end frames that extend vertically from the left and right rear end positions of the storage basket provided between the front wheel legs. By rotatably supporting the rear ends of the left and right upper end side frames and the lower end side frames extending in the front-rear direction, the storage basket is also folded when the rear wheel legs and the front wheel legs are folded.

In that case, the upper end of each rear end frame is fixed to both the left and right positions of the upper connecting frame, while the rear end is fixed to the lower part of each rear wheel leg, and only the front ends of the left and right lower end frames extend forward. Each lower part is fixed, and each rear end frame, each rear wheel leg, and each lower end frame form a substantially triangular rigid body that cannot be deformed when viewed from the side. By transmitting the load from the lower end frame to each rear wheel leg, the load bearing performance can be sufficiently ensured.

Therefore, it is not necessary to fix the lower ends of the left and right rear end frames to the left and right positions of the front end portion of the lower connecting frame, and the rear end position of the storage basket can be adjusted according to the amount of forward protrusion of the lower connecting frame. is not determined by As a result, the rear end position of the storage basket can be positioned forward or rearward from the front end portion of the lower connecting frame, and the layout of the storage basket can be expanded.

The front ends of the front link members of the left and right connecting links between the front wheel legs and the rear wheel legs are rotatably supported by the lower portions of the front wheel legs, and the rear ends of the front link members are supported by the rear link members. The rear link members are rotatably supported midway in the front-rear direction, while the rear ends of the rear link members are rotatably supported under the rear wheel legs, and the front ends are supported at the front of the lower end side frame of the storage basket. It is supported rotatably and slidably in the longitudinal direction of each rear link member. As a result, the storage basket can be smoothly folded when the rear wheel legs and the front wheel legs are folded.

In addition, by rotatably supporting the seat on the upper end of each rear end frame, the substantially triangular rigid body composed of each rear end frame, each rear wheel leg and each lower end frame and the upper connecting frame , the seat can be supported while ensuring sufficient rigidity.

Further, the connecting frame on the lower side of each rear wheel leg portion is projected forward in a convex shape, and the lower end of each rear end frame is placed on the lower side of the connecting frame in a non-contact state with respect to both the front end left and right positions of the lower connecting frame. It is located directly above both the left and right front ends of the connecting frame. Therefore, even if a storage basket layout is adopted in which the lower ends of the left and right rear end frames match the left and right positions of the front end of the lower connecting frame, the lower ends of the respective rear end frames are positioned downward. The front end of the connecting frame can be kept in a non-contact state with respect to both the left and right positions of the front end, and the layout of each rear end frame that can sufficiently secure load bearing performance can be further expanded.

1 is a perspective view of a handcart according to an embodiment of the present invention, viewed obliquely from the rear in a position where front wheel legs and rear wheel legs are opened; FIG. It is the perspective view which looked at the wheelbarrow of FIG. 1 from diagonally forward. It is the side view which looked the wheelbarrow of FIG. 1 from the side. It is the top view which looked the wheelbarrow of FIG. 1 from upper direction. FIG. 2 is a front view of the wheelbarrow of FIG. 1 as seen from the front; It is the rear view which looked the wheelbarrow of FIG. 1 from back. FIG. 2 is a perspective view of the handcart of FIG. 1 as seen obliquely from the rear in a position where front wheel legs and rear wheel legs are closed; It is the perspective view which looked at the wheelbarrow of FIG. 7 from diagonally forward. It is the side view which looked the wheelbarrow of FIG. 7 from the side. FIG. 8 is a plan view of the wheelbarrow of FIG. 7 viewed from above; FIG. 8 is a front view of the wheelbarrow of FIG. 7 viewed from the front; FIG. 8 is a rear view of the wheelbarrow of FIG. 7 viewed from behind;

BEST MODE FOR CARRYING OUT THE INVENTION A wheelbarrow according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of the wheelbarrow according to the first embodiment of the present invention, viewed obliquely from behind with the front wheel legs and the rear wheel legs opened, and FIG. 2 is the wheelbarrow of FIG. The perspective view seen from diagonally forward is shown, respectively. 3 is a side view of the handcart of FIG. 1 viewed from the side, and FIG. 4 is a plan view of the handcart of FIG. 1 viewed from above. 5 is a front view of the handcart of FIG. 1 as seen from the front, and FIG. 6 is a rear view of the handcart of FIG. 1 as seen from the rear.

As shown in FIGS. 1 to 6, the handcart 1 is used as a walker and includes a pair of left and right front wheel legs 11, 11, a pair of left and right rear wheel legs 12, 12, and a handle frame 13. I have.

The left and right front wheel leg portions 11, 11 have upper ends connected to the lower ends of left and right handlebar strut portions 18, 18, respectively, and have front wheels 14, 14 rotatably supported at the respective lower ends. On the other hand, the left and right rear wheel leg portions 12, 12 are provided with rear wheels 15, 15 that are rotatably supported at their respective lower ends. Brakes 16 for braking the respective rear wheels 15 are rotatably supported at the lower ends of the left and right rear wheel leg portions 12 , 12 .

The handle frame 13 is composed of a substantially U-shaped handle 17 as a steering portion, and left and right handle struts 18, 18 as a steering frame supporting both ends (lower ends in the drawing) of the handle 17 from below. ing. The handle 17 includes a handle member 21 extending rearward from both ends of the bottom portion (the front end portion in the drawing) of the handle member 21, and handle support members 22 extending downward from the left and right corners of the handle member 21, respectively. 22.

The handle 17 is provided with grips 23, 23 extending rearward from the left and right corners of the handle member 21, and is steered while the user grips each of the grips 23 with both hands. Brake levers 24 , 24 extending in the front-rear direction are provided on the lower side of each grip portion 23 . Each brake lever 24 has its front end supported by the left and right corners of the handle member 21, and when operated, rotates the brake 16 via a brake operation wire (not shown) to brake the rear wheel 15. ing. Each brake 16 is connected by a brake frame 19 extending in the left-right direction, enabling braking of each rear wheel 15 by operating one of the brake levers 24 .

Also, the left and right handle support members 22 , 22 are formed in a substantially cylindrical shape and attached to the upper ends of the respective handle support portions 18 . Each handle strut 18 supports the upper portion of each front wheel leg 11 so as to be slidable in the vertical direction while being guided by the inner wall surface. Each handle strut 18 is formed from a pipe extruded from aluminum, aluminum alloy, stainless steel, steel, or the like.

Separate left and right brackets 25, 25 are fixed to the upper ends of the left and right front wheel leg portions 11, 11 (lower ends of the respective handlebar support portions 18). Each bracket 25 is formed to have a substantially U-shaped cross section, and the upper ends of the left and right rear wheel legs 12, 12 are attached to the mounting portion opening rearward of each bracket 25 via a horizontal shaft 26 extending in the left-right direction. rotatably supported. The lower ends of the front wheel legs 11 are connected by a front connecting frame 27 extending in the left-right direction.

The upper and lower ends of the left and right rear wheel legs 12, 12 are connected to each other by rear upper and lower connecting frames 28, 29 as upper and lower connecting frames extending in the left-right direction. The connecting frame 28 on the upper rear portion extends linearly in the horizontal direction, while the connecting frame 29 on the lower rear portion protrudes forward in a substantially U-shape opening rearward in plan view. formed.

Between the left and right front wheel legs 11, 11, a storage basket 3 for storing luggage is provided. The storage basket 3 has left and right rear end frames 31, 31 extending vertically at both left and right rear end positions. The upper end portion of each rear end frame 31 is fixed to the left and right end portions (both left and right positions) of the connection frame 28 on the rear upper side. In this case, a layout is employed in which the lower ends of the left and right rear end frames 31, 31 match the left and right positions of the front end portion of the connecting frame 29 on the lower rear side.

Moreover, the storage basket 3 is disposed so as to face each other at both upper and lower ends thereof, and is capable of being lowered and lowered between an upright position and a substantially horizontal lying down position. It has The upper and lower hoisting frames 32 and 33 are each formed in a substantially U-shape opening rearward. The hoisting frame 32 at the upper end has left and right upper end side frames 34, 34 extending in the front-rear direction on both the left and right ends of the upper edge of the storage basket 3, while the hoisting frame 33 at the lower end is for storage. Left and right lower end side frames 35, 35 extending in the front-rear direction are provided on both left and right ends of the lower edge of the basket 3, respectively.

Both ends (rear ends) of the upper undulating frame 32 are rotatably supported by both ends of a horizontal shaft member 36 (horizontal shaft) extending in the left-right direction through the upper end of each rear end frame 31 . On the other hand, both ends (rear ends) of the hoisting frames 33 at the lower ends are rotatably supported at the lower ends of the respective rear end frames 31 around horizontal shafts 37 extending in the left-right direction.

The storage basket 3 has a pair of left and right front end frames 38, 38 extending vertically between and connecting the undulating frames 32, 33 at the upper and lower ends at the front end thereof. The hoisting frames 32 and 33 are rotatably supported around the horizontal axis. Further, the storage basket 3 includes five rail-like members 39, which are thin and have substantially the same shape as the respective hoisting frames 32, 33 and are arranged at approximately equal intervals in the vertical direction between the upper and lower hoisting frames 32, 33. 39, . . . Each fence-like member 39 has rear ends extending in the left-right direction and connected to each other in a ring shape, and is rotatable about a horizontal axis extending in the left-right direction with respect to each rear end frame 31 and each front end frame 38 . Supported.

Further, the lower end of each rear end frame 31 is fixed to the lower portion of each rear wheel leg portion 12 by a bolt member 41 extending in the left-right direction, and is connected to the front ends of left and right lower end frames 42, 42 extending forward. are fixed only for each. In this case, each rear end frame 31 has its upper end fixed to both the left and right positions of the connecting frame 28 on the rear upper side, while the rear end is fixed to the lower part of each rear wheel leg 12 and moves forward. The respective lower ends are fixed only to the front ends of the left and right lower end frames 42, 42 extending, and each rear wheel leg portion 12 and each lower end frame 42 form a non-deformable substantially triangular rigid body in a side view.

The upper undulating frame 32 is provided with a lid body 43 for opening and closing the opening edge of the storage basket 3 , that is, the peripheral edge of the upper facing frame 32 . The lid body 43 is rotatably supported by the rear end portion of each upper end side frame 34 of the upper undulating frame 32 via a horizontal shaft extending in the left-right direction. A bottom plate 44 having a shape conforming to the peripheral edge of the hoisting frame 33 is attached to the hoisting frame 33 at the lower end. The lid 43 and the bottom plate 44 are molded from hard resin.

7 is a perspective view of the handcart 1 of FIG. 1 when the front wheel legs 11 and the rear wheel legs 12 are closed, and is viewed obliquely from behind. FIG. 8 is a view of the handcart 1 of FIG. 7 viewed from the front. 4 shows a perspective view, respectively. 9 is a side view of the handcart 1 of FIG. 7 viewed from the side, and FIG. 10 is a plan view of the handcart 1 of FIG. 7 viewed from above. 11 is a front view of the handcart 1 of FIG. 7 as seen from the front, and FIG. 12 is a back view of the handbarrow 1 of FIG. 7 as seen from the rear.

As shown in FIGS. 7 to 12, each front wheel leg portion 11 and each rear wheel leg portion 12 rotates around the horizontal axis 26 of each bracket 25 so that the upper ends of the rear wheel leg portions 12 and 12 rotate, thereby changing the state of use. 1 to 6) to the closed leg position in the folded state.

Between the lower corresponding positions of the front wheel legs 11 directly above the front connecting frame 27 and the lower corresponding positions of the rear wheel legs 12 corresponding directly above the lower rear connecting frame 29, There are provided left and right connecting links 45, 45 extending in the longitudinal direction between the front wheel leg portions 11 and the rear wheel leg portions 12 to connect them.

Each connecting link 45 has its front end (right end in FIG. 3) rotatably supported by a horizontal pin 461 (horizontal shaft) extending in the left-right direction at a position corresponding to the lower portion of each front wheel leg portion 11, and moves rearward (left side in FIG. 3). A front link member 46 extending forward, and a rear link member having its rear end (left end in FIG. 3) rotatably supported by a bolt member 41 at a position corresponding to the lower portion of each rear wheel leg portion 12 and extending forward (right side in FIG. 3). 47. The rear ends of the left and right front link members 46, 46 are rotatably supported via a horizontal pin 48 (horizontal shaft) extending in the left and right direction at the middle position of the left and right rear link members 47, 47 in the longitudinal direction. In this case, the bolt member 41 also serves as a horizontal shaft that rotatably supports the rear end of the rear link member 47 .

The front ends of the left and right rear link members 47 , 47 are provided with long holes 472 elongated in the longitudinal direction of each rear link member 47 . A horizontal pin 475 (horizontal shaft) projecting substantially horizontally outward from a substantially intermediate position in the front-rear direction of each lower end side frame 35 of the lower hoisting frame 33 is slidably inserted into the long hole 472 . . In this case, from one end of each rear link member 47 to the middle portion in the front-rear direction including the long hole 472 (the portion up to the horizontal pin 48 at the rear other end of each front link member 46) is the lodging position of the upper and lower hoisting frames 47, 47. to the upright position, the front wheel legs 11 and the rear wheel legs 12 are connected to the hoisting frames 32 and 33 so that they can be converted from the open leg position in use to the closed leg position in the folded state. They function as left and right connecting arms connected to the front link member 46 of the link 45 so as to be rotatable around horizontal pins 461 and 48 extending in the left and right direction.

The front link member 46 and the rear link member 47 of each connecting link 45 are centered around the horizontal pin 48 at the rear end of the front link member 46 as the upper and lower hoisting frames 32 and 33 move from the lying position to the standing position. configured to fold.

Between each front link member 46 and each rear link member 47, an elastic member 49 biases each front wheel leg portion 11 and each rear wheel leg portion 12 so as to hold them in the open position and the closed position. is provided. The expandable member 49 is composed of an expandable expandable spring. Both ends of the elastic member 49 (expansion spring) are positioned rearward of the protruding ends of the projecting pieces 462 protruding upward from the rear end portions of the front link members 46 and the rear ends of the front link members 46. Each rear link member 47 is engaged with a projecting portion 473 projecting outward from a substantially intermediate position in the axial direction.

In this case, the expansion/contraction member 49 is aligned with the axis of the horizontal pin 48 at the rear end of the front link member 46 on the expansion/contraction axis during conversion between the open position and the closed position of each front wheel leg portion 11 and each rear wheel leg portion 12 . When the core is positioned, it is most stretched, and when it exceeds this position, it is biased toward the open leg position side or the closed leg position side by the biasing force due to contraction. In short, the telescopic member 49 has the front wheel legs 11 and the rear wheel legs 12 converted to the open position (the positions shown in FIGS. 1 to 6), and the front wheel legs 11 and the rear wheel legs. 12 is in the state of being converted to the closed position (positions shown in FIGS. 7 to 12), it contracts most, and each front wheel leg 11 and each rear wheel leg 12 is urged to the open leg position or the closed leg position. I try to keep it.

Brackets 51, 51 protruding rearward are provided at the upper end portion of each rear end frame 31 positioned between the rear upper connecting frame 28 and the horizontal shaft member 36, respectively. Both ends of the substantially U-shaped seat portion 5 are rotatably supported at the front ends (rear ends) of the brackets 51 via horizontal shafts 52 extending in the left-right direction. In addition, base ends of a pair of left and right links 53, 53 are rotatably supported on the lower portion of each rear end frame 31 around a horizontal shaft 54 extending in the left-right direction. A rod member 55 extending in the left-right direction is attached to the tip of each link 53 .

Further, support plates 56 , 56 are attached to the lower surface of the seat portion 5 on the base side (both end side) to support both ends of the rod member 55 so as to be slidable along the base side of the seat portion 51 . . Both ends of each support plate 56 are attached to the base end side position and the tip end side position of the seat portion 5 with a gap that allows the rod member 55 to slide with respect to the lower surface of the seat portion 5 . Then, the seating portion 5 is converted to a substantially horizontal seating position (the position shown in FIGS. 1 to 6) where the seating portion 5 can be seated when both ends of the rod member 55 abut against the distal end positions of the support plates 56. On the other hand, when both ends of the rod member 55 come into contact with the base end positions of the support plates 56, the rod member 55 is converted to a retractable retracted position (positions shown in FIGS. 7 to 12).

Therefore, in the present embodiment, the left and right rear end frames 31, 31 extending in the vertical direction at both the rear end left and right positions of the storage basket 3 provided between the left and right front wheel legs 11, 11 are provided at both upper and lower ends, Left and right upper end side frames 34, 34 of the upper end undulating frame 32 and left and right lower end side frames 35, 35 of the lower end undulating frame 33 extending in the front-rear direction from the left and right ends of the upper and lower edges of the storage basket 3. Each end is rotatably supported. Therefore, when the rear wheel legs 12 and the front wheel legs 11 are folded, the hoisting frames 32 and 33 at the upper and lower ends of the front end frames 38 rotate about the horizontal axis, and the storage basket 3 is also folded.

In this case, the upper ends of the respective rear end frames 31 are fixed to the left and right positions of the connecting frame 28 on the rear upper side, while the left and right lower end frames 42, 42 are fixed to the lower portions of the rear wheel legs 12 at the rear ends thereof. The lower end of each rear end frame 31 is fixed only to the front end of the , and each rear end frame 31, each rear wheel leg portion 12, and each lower end frame 42 form a substantially triangular rigid body that cannot be deformed in a side view. ing. As a result, the load applied to each rear end frame 31 can be transmitted from each lower end frame 42 to each rear wheel leg portion 12 to ensure sufficient load bearing performance.

Therefore, it is not necessary to fix the lower ends of the left and right rear end frames 31, 31 to both the left and right positions of the front end portion of the lower rear connecting frame 29, and the rear end position of the storage basket 3 is fixed to the lower rear connecting frame 29. is not determined according to the amount of forward protrusion of the As a result, the rear end position of the storage basket 3 can be positioned forward or rearward from the front end portion of the connecting frame 29 on the rear lower side, and the layout of the storage basket 3 can be expanded.

The front ends of the front link members 46 of the left and right connecting links 45 between the front wheel legs 11 and the rear wheel legs 12 are rotatably supported by the lower portions of the front wheel legs 11. The end of the rear link member 47 is rotatably supported about the axis of the horizontal pin 48 at the middle position in the longitudinal direction. On the other hand, the rear end of each rear link member 47 is supported by the lower portion of each rear wheel leg portion 12 so as to be rotatable around the axis of the bolt member 41 , and the front end of each rear link member 47 is supported by the lower end side frame 35 of the storage basket 3 . It is rotatably supported on the front portion via a horizontal pin 475 and slidably supported in the longitudinal direction of each rear side link member 47 . As a result, the storage basket 3 can be smoothly folded when the rear wheel legs 12 and the front wheel legs 11 are folded.

Since the seat surface portion 5 is rotatably supported on the upper end portion of each rear end frame 31, a substantially triangular rigid body composed of each rear end frame 31, each rear wheel leg portion 12, and each lower end frame 42 is formed. And the connecting frame 28 on the rear upper side can support the seat surface portion 5 in a state in which the rigidity thereof is sufficiently ensured.

Further, the connecting frame 29 on the lower rear portion of each rear wheel leg portion 12 protrudes forward in a convex shape, and the lower end of each rear end frame 31 is offset from the left and right front end positions of the connecting frame 29 on the lower rear portion. It is positioned directly above both the left and right front ends of the connecting frame 29 on the lower side of the rear portion in a contact state. Therefore, even if the storage basket 3 is laid out so that the lower ends of the left and right rear end frames 31, 31 match the left and right positions of the front end portion of the connection frame 29 on the lower rear side, each rear end frame 31 is , 31 can be placed in a non-contact state with both the left and right positions of the front end of the connecting frame 29 on the lower side of the rear portion, and the layout of each rear end frame 31 capable of sufficiently ensuring load bearing performance is further expanded. be able to.

It should be noted that the present invention is not limited to this embodiment, and includes various other modifications. For example, in the present embodiment, the storage basket 3 is laid out so that the lower ends of the left and right rear end frames 31, 31 match the left and right positions of the front end portion of the connecting frame 29 on the lower rear side. A storage basket layout may be employed in which the lower end of the rear end frame is located forward or rearward from both the left and right front end portions of the connection frame on the lower rear side.

Further, in this embodiment, between the upper and lower hoisting frames 32 and 33 of the storage basket 3, 5 thin rods having substantially the same shape as the hoisting frames 32 and 33 and arranged at approximately equal intervals in the vertical direction are provided. Although the fence-like members 39, 39, .

Furthermore, in the present embodiment, the case where the handcart 1 is used as a walker has been described, but it goes without saying that the present invention may be applied to other handcarts such as silver cars and shopping carts.

1 wheelbarrow 11 front wheel leg 12 rear wheel leg 14 front wheel 15 rear wheel 17 steering wheel (steering unit)
18 steering column (steering frame)
26 Horizontal shaft 28 Rear upper connection frame 29 Rear lower connection frame 3 Storage basket 31 Rear end frame 34 Upper end side frame 35 Lower end side frame 36 Horizontal shaft member (horizontal shaft)
37 horizontal shaft 41 bolt member (horizontal shaft)
42 Lower end frame 45 Connection link 46 Front side link member 461 Horizontal pin (horizontal axis)
47 rear link member 475 horizontal pin (horizontal axis)
48 horizontal pin (horizontal axis)
5 seat surface portion 52 horizontal axis

Claims (4)

left and right steering frames extending downward from the steering unit which the user steers while holding with both hands; left and right front wheel legs connected to the lower ends of the respective steering frames and supporting the front wheels so that they can roll; left and right rear wheel legs that are connected to the lower ends of the respective steering frames and that support the rear wheels so that they can roll; upper and lower connecting frames that connect the upper and lower ends of the rear wheel legs; wherein the rear wheel legs and the front wheel legs are foldable about a horizontal axis extending in the left-right direction from the open leg position to the closed leg position,
A storage basket for storing luggage is provided between the front wheel legs,
Left and right rear end frames extending in the vertical direction are provided at both the left and right rear end positions of the storage basket,
At the upper and lower ends of each of the rear end frames, the rear ends of the left and right upper end side frames and the lower end side frames extending in the front-rear direction respectively extend from the left and right ends of the upper and lower edges of the storage basket. It is rotatably supported around the axis,
Each of the rear end frames has upper ends fixed to left and right positions of the upper connecting frame, and left and right lower ends extending forward with the rear ends fixed to the lower portions of the rear wheel legs. A handcart, characterized in that each lower part is fixed only to the front end of a frame, and the rear wheel legs and the lower end frames form a substantially triangular rigid body that cannot be deformed when viewed from the side. Left and right connecting links are provided between the front wheel legs and the rear wheel legs,
each of the connecting links includes a front link member and a rear link member that are bent to each other when the front wheel leg portions and the rear wheel leg portions are folded;
Each of the front link members has a front end rotatably supported by a lower portion of each front wheel leg portion around a horizontal axis extending in the left-right direction, and a rear end of each front link member which is positioned halfway in the front-rear direction of the rear link member. While being rotatably supported around a horizontal axis extending in the direction of
Each of the rear link members has its rear end rotatably supported by the lower portion of each rear wheel leg portion around a horizontal axis extending in the left-right direction, and its front end in front of the lower end side frame of the storage basket. 2. The handcart according to claim 1, wherein the handcart is rotatably supported around a horizontal axis extending in the lateral direction and slidably in the longitudinal direction of each of the rear link members. 3. The handcart according to claim 1, wherein a seat on which the user can sit is rotatably supported on the upper end of each rear end frame about a horizontal axis extending in the left-right direction. The connection frame on the lower side of each rear wheel leg protrudes forward in a convex shape,
The lower end of each of the rear end frames is positioned directly above the left and right front end positions of the lower connecting frame in a non-contact state with the left and right front end positions of the lower connecting frame. Item 4. A wheelbarrow according to any one of items 3.

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