JP5586667B2 - Wheelbarrow - Google Patents

Description

  The present invention relates to a wheelbarrow.

As a shopping car or a silver car, a handcart 100 as shown in FIGS. 10 and 11 has been conventionally used (for example, see Patent Document 1).
The handcart 100 includes a front wheel frame portion 200, a rear wheel frame portion 300, and a pusher portion 400, and a user such as an elderly person pushes the pusher 410 of the pusher portion 400 in a traveling state shown in FIG. if you press with, or put the luggage in the luggage storage container of the bag 500, etc., put the luggage such as shopping basket to seat section 600 which also serves as a place luggage Ru can walk safely. In addition, when tired, the user can sit on the seat 600.
Further, as shown in FIG. 11, the handcart 100 can be folded compactly by rotating the front wheel frame portion 200 toward the rear wheel frame portion 300 with the pivot shaft 220 as a center, and in this folded state, as shown in FIG. The front wheel 210 and the rear wheel 310 are supported in a self-supporting state. In other words, it is compact when folded when not in use, and requires only a small storage space, and it is safe because it can stand up in its folded state.

JP 2012-56537 A

However, in the conventional handcart 100 as described above, as shown in FIG. 11, the bottom of the bag 500 and the seat 600 are inevitably tilted in the folded state. In the case of a soft bag-like container such as the bag 500, the container itself is folded. Therefore, when the user folds the bag 500 with the article in the bag and returns to the shop and tries to get on the vehicle such as a bus or a train, the contents may be tilted and overlapped to be damaged.
Further, in place of the seat 600 of the wheelbarrow 100 shown in FIGS. 10 and 11 described above, when a luggage storage container having a lid that also serves as a seat is provided, the bottom of the container is inclined when folded. The problem is not solved.

  In view of the above circumstances, an object of the present invention is to provide a handcart that can maintain the same posture of a luggage container as before folding even when folded.

In order to achieve the above object, a handcart according to the present invention includes a front wheel frame portion that rotatably supports a front wheel at a lower end, a rear wheel frame portion that rotatably supports a rear wheel at a lower end, and a push that performs a traveling operation. A wheelbarrow main body having a hand part, and a luggage container supported by the wheelbarrow main body, the front wheel frame part rotating about a pivot shaft, and the front and rear wheels are grounded A wheelbarrow capable of selecting a state of being folded toward the rear wheel frame portion that has become capable of self-supporting, wherein one end is fixed to the rear wheel frame portion on both sides in the width direction of the rear wheel frame portion, and the other end Has a pair of arms that extend in parallel to the front wheel frame portion and secure a space for placing a luggage container therebetween. The front wheel frame portion is in contact with the front wheel and the rear wheel in the running state. On the ground surface that is in contact with the ground The inclination angle in the extending direction of the arm portion to be extended is substantially the same as the inclination angle in the extending direction of the arm portion with respect to the ground contact surface in a state where the front wheel and the rear wheel are grounded to the ground contact surface in the folded state. The pusher portion includes a pusher and a pair of pusher leg portions extending from the pusher, and the two pusher legs extend from the pusher. The pusher leg portion is supported by the rear wheel frame portion so as to be slidable in the vertical direction so as to coincide with each other.

Further, although the handcart of the present invention is not particularly limited, it is sufficient that the luggage container is supported by a part of the rear wheel frame part or the arm part. It is good also as a structure which has a frame member provided with a part and the opening part periphery of a luggage container is supported by this frame member.
In other words, if the frame member is provided as described above, the opening of the luggage container can be firmly held in the open state, and it is easy to take in and out the stored items, and a hard lid that opens and closes the opening is provided. If the peripheral edge of the lid is received by the frame-like member from below, the lid can also be used as a seat for a user to sit on.

The handcart of the present invention is not particularly limited, but the pusher portion includes a pusher and a pair of pusher leg portions extending from the pusher, and the double pusher foot portions are vertically moved to both rear wheel frame portions. It is preferable to adopt a configuration that is supported so as to be slidable in the direction.
That is, by providing the slide lock means to one of the rear wheel frame unit and press Teashi unit, thus to release the slide lock means, adjusting the height position of the hand press in accordance with the height or the like of the user Can do.

In addition, it is preferable that the sliding direction of the pusher leg is set to an inclination within 10 degrees with respect to the horizontal plane as much as possible. In other words, if the inclination angle becomes too large, the front and rear positions of the pusher are greatly displaced by the slide, the center of gravity position of the load applied to the pusher is located behind the rear wheel, and the balance is maintained when the user puts the weight on the pusher. There is a risk of breaking down. If it is possible to slide in the vertical direction as much as possible, the center of gravity can always be between the rear wheel and the front wheel regardless of the position of the pusher, even if the height of the pusher is changed. Is expensive .

Further, in a configuration in which pressing Teashi portion is slidable, one ends of the first link plate and the second link plate is rotatably supported, the other end portion of the first link plate front The second link plate is pivotally supported at an intermediate position in the height direction of the frame portion, and the other end of the second link plate is pivotally supported at an intermediate position in the height direction of the rear wheel frame portion. The plate has an extending portion extending rearward from the rear wheel frame portion from the pivotal support portion with the rear wheel frame portion, and one end of the third link plate is pivotally supported by the tip portion of the extending portion, and the third link It is preferable that the other end of the plate is pivotally supported by the pusher leg portion.

According to the above configuration, when the pusher is pressed downward and the pusher leg is slid downward, the pivot shaft with the pusher leg of the third link plate is also lowered together with the pusher leg. And the front-end | tip part of the extension part is pushed down by the 3rd link board, As a result, the pivotal support part with the 1st link board of the 2nd link board is pushed up, and the front wheel frame part of the 1st link board The pivot part is attracted to the pivot part side with the rear wheel frame part of the second link plate. Then, the front wheel frame part is turned around the pivot shaft of the arm part to be in a folded state.
On the other hand, when the pusher is lifted upward in the folded state, the tip of the extension portion is pulled upward, the pivotal support portion of the second link plate with the first link plate is pushed downward, and the first link plate The pivotal support part with the front wheel frame part moves in a direction away from the rear wheel frame part of the second link plate, and the front wheel frame part rotates around the pivotal support shaft of the arm part to enter a traveling state.
That is, if it is set as the said structure, a front-wheel flame | frame part can be easily made into a driving | running | working state and a folding state by pushing and pulling of a pusher.

  Moreover, in the above structures, it is preferable that the extending portion is curved upward so that the rearward protruding length can be suppressed.

The handcart of the present invention is not particularly limited, but it is preferable that the arm is provided substantially parallel to the horizontal plane with the front and rear wheels placed on the horizontal plane.
Furthermore, the handcart of the present invention is provided with a folding operation part between the front wheel frame part and the rear wheel frame part, and the folding operation part has a front end pivotally supported by the front wheel frame part and extending backward. A main body, a lower end pivotally supported at the rear end of the operation section main body, an operation bar operated in the vertical direction along the rear wheel frame section, and a front end pivotally supported in the longitudinal middle portion of the operation section main body. And a link plate having a rear end pivotally supported by the rear wheel frame portion.

  As described above, the handcart according to the present invention includes a front wheel frame portion that rotatably supports a front wheel at a lower end, a rear wheel frame portion that rotatably supports a rear wheel at a lower end, and a pusher portion that performs a traveling operation. A wheelbarrow main body having a luggage storage container supported by the wheelbarrow main body, and the front wheel frame portion rotates around a pivot shaft, and the front and rear wheels are grounded and can stand independently. A wheelbarrow that can be selected to be in a folded state toward the rear wheel frame part side, one end being fixed to the rear wheel frame part on both sides in the width direction of the rear wheel frame part, and the other end being a front wheel frame A pair of arms that extend in parallel to the side and secure a space for placing the luggage container therebetween, and the front wheel frame is configured such that the front and rear wheels in the running state are in contact with the grounding surface. Arm against grounded surface The arm in such a manner that the inclination angle in the extending direction of the arm portion and the inclination angle in the extending direction of the arm portion with respect to the ground contact surface in a state where the front and rear wheels in the folded state are in contact with the ground contact surface are substantially the same. Since it is pivotally supported at the pivot position provided on the other end side of the part, the following excellent effects are provided.

That is, a pair of arm parts, one end of which is fixed to the rear wheel frame part, extend in parallel to the front wheel frame part side, and a space for installing the luggage container is secured between them . be able to.
The front wheel frame is pivotally supported by the arm so that the inclination angle in the extending direction of the arm is substantially the same in the running state and the folded state, so that the luggage container is supported by the rear wheel frame or the arm. By doing so, the posture of the luggage container is not changed in both the traveling state and the folded state. In other words, the luggage container hardly tilts in the folded state or in the traveling posture. Therefore, even if the front wheel frame part is folded to the rear wheel frame part side, the contents are not biased or deformed in the container.

A implementation in the form of a wheelbarrow according to the present invention, is a side view of the running state. It is a perspective view of the handcart main body of the handcart of FIG. It is a perspective view in the state where the height position of the pusher of the handcart main body of FIG. 2 was made high. It is a side view of the folded state of the handcart of FIG. It is sectional drawing of the straight pipe | tube part explaining the height adjustment mechanism of the handcart main body of FIG. It is a reference example of the handcart concerning this invention, Comprising: It is the side view of the driving | running | working state. It is a perspective view of the wheelbarrow main body of the wheelbarrow of FIG. It is a side view showing the state in the middle of folding of the handcart of FIG. It is a side view showing the folding state of the handcart main body of FIG. It is a side view of the traveling state of the conventional handcart. It is a side view of the state which folded the handcart of FIG.

Hereinafter, the present invention will be described in detail with reference to the drawings showing embodiments thereof.
Figures 1-5, represents the implementation in the form of a wheelbarrow according to the present invention.

As shown in FIGS. 1 and 4, the handcart A includes a handcart main body A <b> 1 and a shopping bag 6 a as a luggage storage container indicated by a two-dot chain line.
1-4, the handcart main body A1 includes a rear wheel frame portion 1a, a pusher portion 2a, a front wheel frame portion 3a, a folding operation portion 4a, and a brake device 5a.

The rear wheel frame portion 1 a includes a pair of left and right rear wheel side frames 11, an upper connection frame 12, a container support portion 13, and an arm portion 14.
The rear wheel side frame 11 is made of an aluminum tube or a steel tube, and the upper side is a straight tube portion 11a. The rear wheel support portion 11c is bent backward, and the rear wheel support portion 11c has a rear wheel at the lower end. 11d is rotatably supported.
The straight pipe portion 11a is provided so that the central axis is substantially perpendicular to the horizontal plane when the handcart A travels on the horizontal plane, and as shown in FIG. Engagement holes 11b with which 25a are engaged are formed in multiple stages.

The upper connecting frame 12 includes a pair of left and right fitting cylinder portions 12a and a frame body 12b that connects the fitting cylinder portions 12a, and is formed of resin.
In the upper connecting frame 12, the fitting cylinder portion 12a is fitted to the upper end portion of the straight pipe portion 11a, and the rear wheel side frame 11 is held at a predetermined interval at the upper end thereof.

Arm 14 is slightly one end below the middle position of the Ryojikakan portion 11a is being clamped and held, almost to the ground plane of the caster wheels 33 and the rear wheel 11d in wheelbarrow A is running condition and folding saw state It extends forward (in the direction of the caster wheel 33) from the straight tube portion 11a side so as to be parallel (that is, the inclination angle is approximately 0 degrees).

The container support portion 13 includes two horizontal arm portions 13a and a container receiving portion 13b, and is made of resin.
One end of the horizontal arm portion 13a is fixed to the lower end of the straight pipe portion 11a.
Container receiving unit 13b is configured to connect them horizontal arm portion 13a, so that the bottom of the resin and fabric shopping bag 6 a is received.

The pusher portion 2 a includes a pusher main body 21 and leg portions 22 provided so as to extend in parallel from both sides of the pusher main body 21.
The pusher main body 21 has a pusher 21a and a leg connecting portion 21b, and is a substantially U-shaped hollow member formed by combining resin-molded members, and is formed at the center of the pusher 21a. An operation hole 21c for the lock pin release button 23 is formed.

In addition, a lock pin release button 23 is provided in the pusher body 21 so that the upper surface of the pusher body 21 is exposed to the outside from the operation hole 21c. A connecting bar or connecting wire with the rod 24 is internally provided.
Although not shown, the lock pin release button 23 is always held in a state where its peripheral edge is pressed and urged to the peripheral edge of the operation hole 21c of the pusher body 21 by an urging means such as a spring. By being pushed into the inside of the hand 21a, the lock release rod 24 shown in FIG. 5 is slid in the engagement release direction of the lock pin 25a via the connection bar or the connection wire.

The leg portion 22 is a pipe made of a light metal such as resin or aluminum, and has one end fitted into the leg connecting portion 21b of the pusher body 21 so that the lock release rod 24 can be slid inside. Has been.
Moreover, the other end part of the leg part 22 is slidably fitted to the straight pipe part 11a as shown in FIG.

Further, the leg portion 22 is provided with a lock pin support portion 25 on the other end side.
The lock pin support portion 25 includes a lock pin 25a urged outward by a coil spring 25b.
Then, when the lock pin release button 23 is pressed and the lock release rod 24 slides in the direction of the arrow shown in FIG. 5, the lock pin 25a moves backward toward the inside of the straight pipe portion 11a and enters the engagement hole 11b. Is disengaged.

On the other hand, in the pusher portion 2a, the leg portion 22 is slidable in the straight tube portion 11a in a state where the engagement of the lock pin 25a with the engagement hole 11b is released.
When the lock pin 25a reaches the engagement hole 11b at a desired position and the pressing to the lock pin release button 23 is released, the lock pin 25a is re-engaged with the engagement hole 11b and the pusher 21a. Is held at the desired height position. When the lock pin 25a comes close to the engagement hole 11b, the pressing to the lock pin release button 23 is released, and in this state, the leg portion 22 is slid to a position where the lock pin 25a faces the engagement hole 11b. The lock pin 25a may be engaged with the engagement hole 11b.
That is, the pusher portion 2a is configured as described above, and the height position of the pusher 21a is set to the low position shown in FIG. 1 and the high position shown in FIG. 3 by a one-touch operation of operating the lock pin release button 23. The position can be easily changed.

The front wheel frame portion 3a includes a pair of left and right front wheel side frames 31, a lower connection frame 32, and a caster wheel 33 serving as a pair of left and right front wheels.
Both front wheel side frames 31 are obtained by bending an aluminum tube into a substantially U-shape, the long side 31a of the U-shape is on the upper side, and the tip of the long side 31a is the tip of the arm portion 14. By caulking the part, the arm part 14 is supported by the arm part 14 so as to be rotatable around the tip part of the arm part 14.
In addition, the front wheel side frame 31 has a bent angle of the U-shape so that the central axis of the shorter side 31b of the U-shape is substantially perpendicular to the running surface in the running state.

The lower connecting frame 32 includes a pair of left and right connecting tube portions 32a and a frame body 32b that connects the connecting tube portions 32a.
The connecting cylinder portion 32a is fitted at the upper end with a lower portion than the bent portion of the front wheel side frame 31, and the rotating shaft of the caster wheel 33 is fitted at the lower end.

  The front wheel frame portion 3a can be selected between the use state shown in FIG. 1 and the folded state shown in FIG. 4 by folding the front wheel side frame 31 around the tip of the arm portion 14. In the state, the wheelbarrow A can stand on its own by the caster wheel 33 and the rear wheel 11d, and the arm portion 14 is formed in a length that is parallel to the ground contact surface.

The folding operation unit 4 a includes an operation unit main body 41, an operation bar 42, a pair of left and right link plates 43, and a container receiving frame 44.
The operation portion main body 41 has a U-shape, and the open ends of both sides of the U-shape are pivoted on the front wheel side frame 31.

The lower end of the operation bar 42 is pivotally supported by the U-shaped vertical side of the operation unit main body 41 through a guide hole (not shown) of a guide 42 a provided integrally with the frame main body 12 b of the upper connection frame 12. ing.
Each of the link plates 43 has a first pivot portion 43 a at one end pivotally supported by the horizontal arm portion 13 a and a second pivot portion 43 b at the other end pivoted at an intermediate portion of the lateral side of the U-shaped portion of the operation portion main body 41. Has been.
The container receiving frame 44 has bent portions 44b on both sides of the frame main body 44a, and the bent portions 44b are pivotally supported in the vicinity of the leading end of the U-shaped side of the operation portion main body 41 so as to be swingable. The receiving surface 44a is arranged in substantially the same plane as the upper surface of the container receiving portion 13b.

Then, as shown in FIG. 4, the folding operation unit 4 a raises the operation bar 42 upward, whereby the vertical side of the operation unit main body 41 is lifted upward, and the front wheel side side frame 31 is centered on the tip of the arm unit 14. Thus, the wheelbarrow A is folded by rotating to the rear wheel frame 1a side.
At this time, as the operation portion main body 41 is rotated, the link plate 43 is rotated upward on the second pivot portion 43b side around the first pivot portion 43a.
On the other hand, in order to bring the handcart A in the folded state into the traveling state shown in FIG.

The brake device 5 a includes a brake body 51, a brake handle 52, a brake wire 53, and a lock lever 54.
The brake body 51 includes a pair of left and right wheel lock portions 51a (only one side is shown in the figure) and a connecting portion 51b that connects the wheel lock portions 51a.

  The wheel lock portion 51a is substantially L-shaped, and one side of the L-shape is a wheel contact portion 51c disposed in parallel to the rotation axis of the rear wheel 11d, and the other side of the L-shape is the rear wheel shaft side. It becomes the pivot part 51d pivoted to the brake support arm 55 extended from.

That is, the wheel lock portion 51a rotates about the pivot shaft of the pivot portion 51d, so that the wheel contact portion 51c is separated from and contacted with the peripheral surface of the rear wheel 11d.
The brake body 51 by the coil spring 56 is biased to remain wheel contact portion 51c is separated from the rear wheel 11d.

The brake handle 52 is formed by bending an aluminum tube. The brake handle 52 has a substantially U-shape having a handle main body 52a and handle arm portions 52b on both sides of the handle main body 52a. 52a is parallel to the pusher 21a, and the tip of the handle arm portion 52b is supported by the handle support arm so as to rotate about the pivotal support portion of the handle support portion 57 extending from the lower end of the pusher body 21. Yes.
One end of the brake wire 53 is fixed to the handle arm portion 52b of the brake handle 52, and the other end is fixed to the brake body 51. When the handle body 52a of the brake handle 52 is pulled toward the pusher 21a, the brake wire 53 is lifted upward. It is done.
As the brake wire 53 is pulled upward, the brake body 51 rotates against the urging force of the coil spring 56, the wheel contact portion 51c is pressed against the rear wheel 11d, and the rear wheel 11d rotates. Is locked.

  As described above, the lock lever 54 pulls the handle body 52a of the brake handle 52 toward the pusher 21a and pulls it up while the rotation of the rear wheel 11d is locked, thereby holding the brake handle 52 in the locked state. It is like that.

  The shopping bag 6a is formed of a flexible material such as a vinyl-coated cloth, and the bottom thereof is received by the receiving surfaces of the container receiving portion 13b and the frame main body 44a. 12 are supported and fixed to the frame body 12b.

As described above, the wheelbarrow A has the pair of arm portions 14 extended from the rear wheel side frame to the front wheel side, and the upper end of the front wheel side frame 31 is pivotally supported at the tip thereof. even a shorter span between the rear wheel 11 d and wheel 33 can be secured mounting space of shopping bags 6a as sufficient luggage container.

In addition, since the straight pipe portion 11a is substantially perpendicular to the horizontal plane, the load applied to the pusher 21a is also applied perpendicularly to the straight pipe portion 11a via the leg portion 22.
Therefore, even if the leg portion 22 and the straight pipe portion 11a are formed with small diameter and thin pipes, sufficient strength against the load can be secured, and the weight of the handcart A can be reduced.

Further, as described above, since the straight pipe portion 11a is substantially perpendicular to the horizontal plane, even if the height position of the pusher 21a is changed, the position of the pusher 21a in the front-rear direction of the handcart A is almost changed. Even if the height of the pusher 21a is increased, the position of the pusher 21a is held at the position between the front and rear wheels, and safety can always be ensured.
That is, it is possible to provide a position of the straight pipe portion 11a to the rotation axis position near the rear wheel 11 d, it is possible to ensure a mounting space for more shopping bags 6a.

Furthermore, since the bottom of the shopping bag 6a can be received by the receiving surfaces of the container receiving portion 13b and the frame main body 44a in both the traveling state and the folded state, the shopping bag 6a can be used not only in the traveling state but also in the case of being folded and standing independently. The bottom of the bag 6a is not inclined and the shopping bag 6a is not folded. Therefore, the baggage accommodated in the shopping bag 6a is not tilted and broken or biased.
Moreover, since the leg part 22 of the pusher part 2a and the straight pipe part 11a become one line, it looks simple and looks good.

6 to 9 show reference examples of the handcart according to the present invention.
As shown in FIGS. 6 to 9, the handcart B includes a handcart main body B1 and a luggage container 6b as shown by a two-dot chain line in FIGS. 6, 8, and 9.

  The handcart main body B1 includes a rear wheel frame portion 1b, a pusher portion 2b, a frame member 7, and a front wheel frame portion 3b.

The rear wheel frame portion 1 b includes a pair of left and right rear wheel side frames 16, a connecting frame 17, a rear wheel 18, and a pair of left and right arm support members 19.
The rear wheel side frame 16 is made of an aluminum tube or a steel tube, and includes a straight tube portion 16a and a connecting frame support portion 16b formed by bending the lower end portion of the straight tube portion 16a rearward in the traveling direction of the handcart B. I have.

The connection frame 17 is connected to a connection frame support portion 16b facing both ends thereof.
The rear wheel 18 is rotatably supported on both sides of the connecting frame 17.
The arm support member 19 includes a support portion main body 19a and a guide tube support portion 19b, and the straight tube so that the guide tube support portion 19b faces the guide tube support portion 19b of the other arm support member 19 in a pair. It is being fixed to the upper end part of the part 16a.

Each guide tube support portion 19b supports a guide tube 81 into which a later-described pusher leg portion 27a is slidably fitted.
A slide lock means 82 is provided at the upper end of the guide tube 81.

The slide lock means 82 includes a connecting portion 82a and lock pin guide portions 82b provided on both sides of the connecting portion 82a.
The connecting portion 82a includes a lock release button 82c on the center upper surface side.

Lock release button 82c is not shown, always with being urged to protrude out of the connecting portion 82a via the provided et the spring mechanism in the connecting portion 82a, the lock will be described later, via a cam mechanism be connected to the pin, by degenerating the lock pin to the connecting portion 82a side by pressing from above so as to enter into the connecting portion 82a is it Do to be unlocked.
The lock pin guide portion 82b is fitted to the upper end of the guide tube 81, and a pusher leg portion 27a to be described later is slidably slidable. By operating the lock release button 82c, the guide cylinder 81 appears and disappears. That is, when the lock release button 82c is pressed, the lock pin is inserted into the connecting portion 82a side from the guide tube 81, and protrudes into the guide tube 81 when the lock release button 82c is released.

The pusher portion 2 b includes a leg member 27 and a pusher member 28.
The leg member 27 is formed of an aluminum tube or a steel pipe in a substantially U-shape or U-shape, and includes a pair of pusher leg portions 27a and a leg portion connection portion 27b that connects the lower ends of the pusher leg portions 27a. I have.

The pusher leg portion 27a is slidably inserted into the guide cylinder 81 with the leg connecting portion 27b facing downward, and a lock hole (not shown) into which the aforementioned lock pin can be inserted is provided in two stages on the wall surface. Is provided.
That is, of the two locking holes, the upper lock hole, when the state folded wheelbarrow B as described later, the lock pin is fitted, to suppress the sliding of the push Teashi portion 27a, the lower side of the lock hole Is provided so that when the handcart B is put in the running state, the lock pin is engaged and the slide of the pusher leg portion 27a is prevented.

The pusher member 28 includes a pusher main body 28a formed by assembling resin molded members, and a brake lever 28b shown in FIG.
Press hand body 28a is provided with a push hands 28 d, and a leg portion fitting portion 28 c.

The pusher 28 d is provided so as to be orthogonal to the two pusher leg portions 27 a and to have a length longer than the distance between the pusher leg portions 27 a and to protrude from both sides.
Brake lever 28b is not supported by the leg section fitting portion 28 c, by attracting the push hands 28 d side, although not shown, the wheel lock provided on the support body 19a via a brake wire over The rotation of the rear wheel 18 can be suppressed by pressing the portion 51 a against the peripheral wall of the rear wheel 18.

The frame member 7 is formed by bending an aluminum tube or a steel tube, and has a substantially U-shape or a substantially U-shape including arm portions 72 on both sides of the connecting portion 71.
The frame member 7 is substantially parallel to the horizontal plane when the front and rear wheels are grounded to the horizontal plane when both the arm portions 72 are in the travel state and the folded state described later on the support body 19a of the arm support member 19 (that is, The inclination angle is approximately 0 degrees).

The front wheel frame portion 3b includes a pair of left and right front wheel side frames 35, a lower connection frame 36, and caster wheels 37 serving as a pair of left and right front wheels.
Both front wheel side frames 35 are obtained by bending an aluminum tube, and are arranged so that the upper ends sandwich the two arm portions 72 from both sides, and are pivotally supported by the arm portions 72, respectively.

The lower connecting frame 35 includes a pair of left and right connecting cylinder portions 35a and a frame body 35b that connects the connecting cylinder portions 35a.
The connection cylinder part 35a has the lower end part of the front wheel side side frame 35 fitted to the upper end part, and the rotation shaft of the caster wheel 37 is fitted to the lower end part.

In the front wheel frame portion 3 b, the intermediate positions of both the front wheel side frames 35 and the intermediate position of the rear wheel side frames 16 are connected via the first link plate 91 and the second link plate 92.
One end of the first link plate 91 is pivotally supported by the front wheel side frame 35, and the other end is pivotally supported by one end of the second link plate 92.

The other end of the second link plate 92 is pivotally supported by the rear wheel side frame 16, and further includes an extending portion 92 a that extends further rearward in the running direction from the rear wheel side frame.
The extension portion 92a is curved upward and backward from the pivot portion, and the lower end of the third link plate 93 is pivotally supported at the tip of the extension portion 92a.
The upper end of the third link plate 93 is pivotally supported by the lower end portion of the pusher leg portion 27a.

Although not shown in detail in the drawing, the luggage container 6b includes a container body and a lid member.
The container body has a substantially rectangular parallelepiped bag shape with an upper opening formed of a flexible material such as a surface vinyl-coated cloth, and its upper end is locked to the frame member 7.
The lid member has a plate-like core material such as plywood covered with a surface vinyl-coated cloth or the like, and rotates around the upper edge of the rear wheel frame 1b side of the container body to open the upper opening of the container body. In addition to being freely openable and closable, it can also be supported by the frame member 7 from below in the closed state to form a seat.

The handcart B is configured as described above, and as shown in FIG. 6, the arm portion 72 is parallel to the traveling surface in the traveling state.
Then, pressing the lock release button 82c, thereby releasing the engagement to the lock pin of the lock hole, pushing down the push hands 28 d downward, also descends pivot portion of the upper end side of the third link plate 93, Accordingly, the lower end side of the third link plate 93 acts to push down the tip end portion of the extension portion 92a of the second link plate 92.
Incidentally, the lock release button 82c is engagement release to the lock pin of the lock hole, Teashi portion 27a press by depressing the push hands 28 d moves slightly downwards, to a position where the position of the lock pin is shifted from the lock hole Then, the pressing may be released.

  On the other hand, as described above, when the extension portion 92a is pushed down via the third link plate 93, the second link plate 92 is pivoted upward with respect to the first link plate 91 as shown in FIG. The front wheel side side frame 35 is pivoted about the upper end pivotal support portion in the direction of the rear wheel side side frame 16 via the first link plate 91 so as to be pushed up. As shown in FIG. 8, the front wheel frame portion 3b is finally folded to the rear wheel frame portion 1b side.

Further, in this handcart B, the lock pin is engaged with the upper lock hole in this folded state, and the folded state is maintained, and the wheelbarrow B is supported on the grounding surface in a self-supporting state by the caster wheel 37 and the rear wheel 18. The portion 72 is kept parallel to the ground plane.
Accordingly, the article storage container 6b supported by the frame member 7 is held without the tilt of the bottom of the container body because the arm portion 72 is kept parallel to the traveling surface or the grounding surface in the traveling state and the folded state. Is done. That is, even when folded, the luggage accommodated in the container body is not inclined and broken or biased.
Further, the pusher member 28 is disposed between the straight pipe portion 16a and the straight pipe portion 16a of the rear wheel side frames 16 and has a neat design as viewed from the rear, so that the appearance is good.

In the above embodiment, the rear wheel side frame and the front wheel side frame are formed of an aluminum pipe or a steel pipe. However, in order to reduce the weight further, a carbon fiber reinforced resin pipe may be used. .
In the above embodiment, the brake handle is disposed in front of the pusher, but may be disposed in the rear.

In the above embodiment, the lock pin can be unlocked with a single touch by pressing the lock release button, but the lock means can be configured to be locked at an arbitrary height position by screwing a lock screw. I do not care.
In the above embodiment, the arm portion is provided so as to be parallel to the ground contact surfaces of the front wheels and the rear wheels in the running state and the folded state. , You may be a little inclined.

A, B Wheelbarrows A1, B1 Wheelbarrow main bodies 1a, 1b Rear wheel frame part 11 Rear wheel side frame 11a Straight pipe part 11b Engagement hole 11c Rear wheel support part 11d Rear wheel 12 Upper connection frame 12a Fitting cylinder part 12b Frame body 13 Container support portion 13a Horizontal arm portion 13b Container receiving portion 14 Arm portion 16 Rear wheel side frame 16a Straight pipe portion 16b Connection frame support portion 17 Connection frame 18 Rear wheel 19 Arm support members 2a, 2b Pusher portion 21 Push Hand body 21a Pusher 21b Leg connecting part 21c Operation hole 22 Leg 23 Lock pin release button 24 Lock release rod 25 Lock pin support part 25a Lock pin 25b Coil spring 27 Leg member 27a Pusher leg part 27b Leg connection part 28 Pusher member 28a Pusher body 28b Brake lever 28c Leg fitting part 3a, 3b Front wheel frame part 31 Front wheel side frame 31a Long side 31b Short side 32 Lower connection frame 32a Connection cylinder part 32b Frame body 33 Caster wheel (front wheel)
35 Front wheel side frame 35a Connecting cylinder part 35b Frame body 36 Lower connecting frame 37 Caster wheel (front wheel)
4a Folding operation part 41 Operation part main body 42 Operation bar 42a Guide 43 Link plate 43a First pivot part 43b Second pivot part 44 Container receiving frame 44a Frame body 44b Bending part 5a Brake device 51 Brake body 51a Wheel lock part 51b Connecting part 51c Wheel contact portion 51d Pivoting portion 52 Brake handle 52a Handle body 52b Handle arm portion 53 Brake wire 54 Lock lever 55 Brake support arm 56 Coil spring 6a Shopping bag (luggage container)
6b Luggage container 7 Frame member 71 Connection portion 72 Arm portion 81 Guide cylinder 82 Slide lock means 82a Connection portion 82b Lock pin guide portion 82c Unlock button 91 First link plate 92 Second link plate 92a Extension portion 93 Third link Board

Claims (4)

A wheelbarrow main body having a front wheel frame portion that rotatably supports a front wheel at a lower end, a rear wheel frame portion that rotatably supports a rear wheel at a lower end, and a pusher portion that travels.
And a luggage container supported on the barrow body,
A wheelbarrow capable of selecting a traveling state in which the front wheel frame part rotates around a pivot shaft and a folded state toward the rear wheel frame part side where the front and rear wheels are grounded and can stand independently. ,
A pair of one end is fixed to the rear wheel frame portion on both sides in the width direction of the rear wheel frame portion, the other end extends in parallel to the front wheel frame portion side, and a space for installing a luggage container is secured between them. Having an arm part,
The front wheel frame portion is in contact with the inclination angle of the extending direction of the arm portion with respect to the ground contact surface in a state where the front wheel and the rear wheel are in contact with the ground contact surface, and the front wheel and the rear wheel in the folded state. It is pivotally supported at a pivot position provided on the other end side of the arm portion so that the inclination angle of the extending direction of the arm portion with respect to the grounding surface in a state of being grounded to the ground is substantially the same
The pusher portion includes a pusher and a pair of pusher leg portions extending from the pusher,
The handcart characterized in that the both push leg portions are supported so as to be slidable in the vertical direction so that their axis lines coincide with the rear wheel frame portion . 2. The handcart according to claim 1, further comprising a frame member that includes a connecting portion that connects the other ends of the arm portions, and the periphery of the opening of the luggage container is supported by the frame member. The luggage container is wheelbarrow according to claim 1, a part on the rear wheel frame unit or the arm portion is supported. A folding operation part is provided between the front wheel frame part and the rear wheel frame part,
The folding operation unit is
An operation unit main body with the front end pivotally supported by the front wheel frame and extending rearward;
An operation bar whose lower end is pivotally supported at the rear end of the operation unit main body and is operated in the vertical direction along the rear wheel frame unit;
A link plate whose front end is pivotally supported in the middle in the longitudinal direction of the operation unit main body, and whose rear end is pivotally supported by the rear wheel frame portion,
Wheelbarrow according to any one of claims 1 to 3 and a.

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