JP6234985B2 - Wheelbarrow - Google Patents

Description

  The present invention relates to a wheelbarrow such as a silver car or a shopping car.

  This type of handcart has left and right front wheel legs that rotatably support the front wheels at the lower end, left and right rear wheel legs that rotatably support the rear wheels, and left and right handles that support the handle from below. It is provided with a support, and the user can safely walk while pushing the wheelbarrow by holding the handle.

  As such a handcart, each handle column is slidably supported in the vertical direction, and each front wheel leg and each rear wheel leg is in the open leg position in the used state and the closed leg position in the folded state. Left and right vertical cylinder frames having pivot portions at the lower ends for pivotally supporting upper ends of the front wheel legs and rear wheel legs so that they can be selected, and upper and lower ends of each vertical cylinder frame There is known one having an upper and lower horizontal frame extending in the left-right direction between the two (see, for example, Patent Document 1).

  In addition, some wheelbarrows of this type are configured such that each front wheel leg and each rear wheel leg are opened and closed in conjunction with the sliding motion of each handle column. Specifically, by pushing down the handle against each vertical cylinder frame, each front wheel leg portion and each rear wheel leg portion in the runnable state are folded into a closed leg state, and the front wheel is pulled up by lifting the handle from this folded state. The leg portion and each of the rear wheel leg portions can be brought into an open leg state where the vehicle can run again. That is, in this type of wheelbarrow, if each front wheel leg portion and each rear wheel leg portion are closed, the dimensions in the front-rear direction can be reduced, the size can be reduced when not in use, and a small storage space is required. is there.

  Furthermore, in this type of wheelbarrow, a seat is provided on each front wheel leg so that it can be seated on the seat when tired, and shopping between the rear wheel legs can be performed. Some have a storage basket for storing stored luggage or the like in the main body (see, for example, Patent Document 2).

  On the other hand, the front wheel leg portion is converted into a storage position where the seat portion provided on each front wheel leg portion stands along each vertical cylinder frame and a seating position where the seat can lie down and sit down. In some cases, a storage basket for storing luggage or the like in the main body part is provided between the two, that is, on the lower side of the seat part at the sitting position.

JP 2014-177219 A JP 2012-56537 A

  By the way, if the storage basket is provided below the seating portion converted to the seating position, depending on the size and shape of the storage basket, it may become an obstacle when sitting on the seating portion. For this reason, it is necessary to move the storage basket in conjunction with the conversion operation of the seat portion so that it does not get in the way when sitting on the seat portion.

  In that case, it is conceivable to attach the storage basket to the back surface (anti-seat surface) of the seat. At this time, the storage basket is arranged in a posture in which the main body portion extends in the vertical direction along the back surface of the seat portion with the opening portion opened upward when the seat portion is converted to the storage position. However, when the seat portion is converted from the retracted position to the seated position, the main body portion is disposed in a posture extending in the front-rear direction along the back surface of the seat portion with the opening portion opened forward.

  However, in this case, the posture of the storage basket is changed by approximately 90 ° between the storage position of the seating portion and the seating position, and the baggage stored in the main body portion lies on its side, and the baggage and leakage that are likely to be out of shape are lost. It is not possible to store anxious items in the main unit.

  The present invention has been made in view of the above points, and the object of the present invention is to make the storage basket always change in the vertical direction with almost no change between the seating position and the seating position of the seat. Providing a wheelbarrow that can be stored in a posture that extends to the side, prevents the baggage stored in the main unit from lying down, and can smoothly store the baggage that tends to be out of shape or that may leak. There is to do.

In order to achieve the above-mentioned object, in the present invention, left and right front wheel legs that support the front wheels for rolling at the lower end, left and right rear wheel legs for supporting the rear wheels for rolling at the lower end, and a handle downward The left and right handle columns that are supported from the left and right, and the handle columns are slidably supported in the up and down direction, and the front wheel legs and the rear wheel legs are in the open position and folded when in use. Left and right vertical cylinder frames having pivot portions at the lower ends pivotally supporting the upper end portions of the front wheel legs and the rear wheel legs so as to be selectable to the closed leg positions in the state; A wheelbarrow provided with upper and lower horizontal frames that extend in the left-right direction between the upper and lower ends of the cylinder frame is assumed. Further, the seat portion is accommodated between the front wheel leg portions and the seat portion that is converted into a retracted position that stands along the vertical cylinder frame and a seating position that can be seated by lying forward and opens upward. A storage basket for storing the luggage in the main body through the opening is provided. The seat portion is provided with left and right seat frames extending along the left and right sides, and the base ends of the seat frames are rotatably supported by the vertical cylinder frames. On the other hand, the storage basket is provided with left and right upper and lower frames that extend upward toward the opening while supporting the left and right ends of the rear surface, and the upper ends of the upper and lower frames are respectively attached to the front ends of the seat frames. Support for rotation.
In addition, the storage basket is provided with left and right arms, one end of which is rotatably supported by each front wheel leg, and the other end of each arm is rotatably supported by the upper and lower frames. Further, the other end of each arm is rotatably supported on the upper end of each upper and lower frame, and the length from one end to the other end of each arm is determined from the base end of each seat frame to each upper and lower frame. The length is set to be slightly shorter than the length from the upper end to the support point .

  Further, the upper end of each of the upper and lower frames is located on the proximal side from the distal end of the seat so that when the seat is converted into the seating position, the opening area of approximately one third to approximately half of the opening is closed. It is preferable to support each seat frame at a position spaced apart.

  Furthermore, it is preferable to provide a restraining tool for restraining at least one of the seat frames so that they cannot rotate when the seat portion is converted into the storage position.

In short, the base end of each seating frame extending along the left and right sides of the seating portion is rotatably supported by each vertical cylinder frame, while the left and right sides of the rear surface of the storage basket are supported while facing the opening. The upper ends of the upper and lower frames extending upward are rotatably supported at the front ends of the seat frames.
For this reason, when the seating portion is converted to the storage position, the storage basket is disposed in a posture in which the main body portion extends in the vertical direction along each of the upper and lower frames with the opening portion opened upward. On the other hand, when the seat portion is converted from the storage position to the seating position, the storage basket is moved in a posture in which the main body portion extends vertically along the upper and lower frames with the opening portion opened upward. As a result, the posture of the storage basket is hardly changed between the storage position of the seating portion and the seating position, and the main body portion is always arranged in a posture extending in the vertical direction, and is stored in the main body portion. Luggage can be prevented from falling sideways, and luggage that easily loses its shape or that can be leaked can be safely stored in the main body.

In addition , left and right arms, one end of which is rotatably supported by each front wheel leg portion, are provided in the storage basket, and the other end of each arm is rotatably supported by each upper and lower frame, so that the seat portion is retracted. When the arm is converted to the seating position, each arm pulls each upper and lower frame backwards or pushes it forward, smoothly avoiding interference with obstacles between each front wheel leg part, It can be arranged in a forward leaning posture or a backward leaning posture extending in the vertical direction.
Furthermore, the length from one end of each arm to the other end supported by the upper end of each upper and lower frame is slightly shorter than the length from the base end of each seat frame to the upper end of each upper and lower frame. When the seat is converted from the retracted position to the seated position, each arm pulls the upper and lower frames slightly rearward, and the main body is arranged in a slightly forward tilted posture extending in the vertical direction. Can do.

  In addition, the upper end of each upper and lower frame is supported by each seat frame at a position spaced from the distal end of the seat portion toward the proximal end side, and when the seat portion is converted into the seating position, from about one third of the opening. By closing the opening area of approximately half, when the seat is converted to the seating position, the opening area of approximately one third to approximately half of the opening is blocked by the seat, and the storage basket is obstructed when seated. Therefore, it is possible to take a stable seating posture, and it is also possible to increase the size of the storage basket.

  Furthermore, by providing the vertical cylinder frame with a restraining tool that restrains at least one of the seating frames from being unrotatable when the seating part is converted into the storage position, the seating part can be reliably restrained at the storage position. In addition, the storage basket is also maintained in posture so that the luggage can be smoothly taken in and out of the main body from the opening.

It is the perspective view which looked at the attitude | position which converted the seat part into the storing position in the state which opened the handcart which concerns on embodiment of this invention from diagonally forward. It is the side view which looked at the handcart of FIG. 1 from the side. It is the side view seen from the side in the state which closed the handcart of FIG. It is the front view which looked at the handcart of FIG. 1 from the front. It is sectional drawing which illustrates roughly the locked state by the slide lock pin of the handle | steering-wheel support | pillar part of the handcart of FIG. It is the top view which looked at the large diameter cylinder part of the handcart of FIG. 5 from the axial direction. FIG. 7 is a cross-sectional view schematically illustrating a slide fixing state between a large diameter cylindrical portion and a small diameter cylindrical portion of the handcart of FIG. 6. It is a disassembled perspective view of the upper side horizontal cylinder frame and slide lock pin of the handcart of FIG. FIG. 9 is a rear view of the vicinity of a slide lock pin of the upper horizontal cylinder frame of FIG. 8. It is a perspective view of the upper side horizontal cylinder frame of FIG. It is the perspective view of the handcart which looked at the attitude | position which converted the seat part of FIG. 1 into the sitting position from diagonally forward. It is the side view which looked at the handcart of FIG. 11 from the side. It is the front view which looked at the handcart of FIG. 11 from the front. It is the perspective view which looked at the attitude | position which converted the seat part into the storing position in the state which attached the seat cover and the storage basket to the handcart of FIG. 1 from diagonally forward. It is the side view which looked at the handcart of FIG. 14 from the side. It is the side view which closed the leg wheel of FIG. 14 and was seen from the side. It is the front view which looked at the handcart of FIG. 14 from the front. It is the perspective view which looked at the attitude | position which opened the handcart of FIG. 14 and converted the seat part into the sitting position from diagonally forward. It is the side view which looked at the handcart of FIG. 18 from the side. It is the front view which looked at the handcart of FIG. 18 from the front. It is sectional drawing which illustrates roughly the locked state by the slide lock pin of the handle | steering-column part which concerns on the modification of this embodiment. It is sectional drawing which illustrates roughly the slide fixed state of the large diameter cylinder part and small diameter cylinder part which concern on the modification of this embodiment.

  Hereinafter, a handcart according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view of a posture in which a stool is converted into a storage position in a state in which a handcart according to an embodiment of the present invention is opened, and FIG. 2 is a side view of the handcart viewed from the side. 3 is a side view of the handcart viewed from the side with the leg closed, and FIG. 4 is a front view of the handcart viewed from the front. In FIG. 1 to FIG. 4, the small-diameter cylindrical portion fixing member and the cylindrical cap that fix the small-diameter cylindrical portion to the large-diameter cylindrical portion are removed.

  As shown in FIGS. 1 to 4, the handcart A is used as a silver car, and includes a pair of left and right front wheel legs 11 and 11, a pair of left and right rear wheel legs 12 and 12, a handle frame 13, A pair of left and right vertical cylinder frames 14, 14.

  The left and right front wheel leg portions 11, 11 include a front wheel 15 that is rotatably supported at the lower end of each. On the other hand, the left and right rear wheel leg portions 12, 12 are provided with rear wheels 16 rotatably supported at the respective lower ends. Further, brakes 17 for braking the respective rear wheels 16 are rotatably supported at lower ends of the left and right rear wheel leg portions 12, 12.

  The handle frame 13 includes a substantially U-shaped handle 21 and left and right handle column portions 22 and 22 that support both ends (lower end in the figure) of the handle 21 from below. The handle 21 has a handle member 23 extending in the left-right direction at the bottom (upper end in the drawing), a pair of left and right brake levers (not shown) provided on the left and right sides of the handle member 23, and the left and right brakes. A pair of left and right brake operation wires (not shown) operated by a lever. Each brake lever is configured to brake the rear wheel 16 by rotating the brake 17 via a brake operation wire during the operation.

  The left and right handle column portions 22 and 22 include a small-diameter cylindrical portion 24 and a large-diameter cylindrical portion 25 that supports the small-diameter cylindrical portion 24 slidably while being guided by the inner wall surface. The small-diameter cylindrical portion 24 and the large-diameter cylindrical portion 25 are formed from a pipe obtained by extrusion molding of aluminum, an aluminum alloy, stainless steel, steel, or the like, and the small-diameter cylindrical portion 24 is a perfect circle shape, whereas the large-diameter cylindrical portion is 25 has an elliptical shape.

  The left and right vertical cylinder frames 14 and 14 are formed of hard nylon resin, and are formed in an elliptical shape whose inner peripheral surface substantially coincides with the outer peripheral surface of the large-diameter cylindrical portion 25 of each handle column 22. The left and right vertical cylinder frames 14 and 14 are connected by an upper horizontal cylinder frame 26 extending in the left-right direction between the upper ends thereof. The upper horizontal cylinder frame 26 is formed in a substantially annular cross section. Further, the left and right vertical cylinder frames 14 and 14 are connected by a lower horizontal cylinder frame 27 extending in the left-right direction between the lower ends thereof. The lower horizontal cylinder frame 27 is formed in a substantially track shape in cross section.

  The left and right vertical cylinder frames 14 and 14 have upper cylindrical pieces 141 and 141 that project inward in the left-right direction opposite to each other at the upper ends thereof, and lower sides that project inward in the left-right direction from each other at the lower ends. Tube pieces 142 and 142 are provided. And the inner peripheral surface of each upper cylinder piece 141 is formed in the shape which corresponds with the outer peripheral surface of the upper side horizontal cylinder frame 26, and is fastened with the screw in the state where the left and right ends of the upper side horizontal cylinder frame 26 are inserted. . The inner peripheral surface of each lower cylindrical piece 142 is formed in a shape that coincides with the outer peripheral surface of the lower horizontal cylindrical frame 27, and is fixed by screws with both left and right ends of the lower horizontal cylindrical frame 27 being inserted. doing. The upper horizontal cylinder frame 26 and the lower horizontal cylinder frame 27 are formed from a pipe obtained by extrusion-molding aluminum, an aluminum alloy, stainless steel, steel, or the like.

  The left and right vertical cylinder frames 14 and 14 are formed as a substantially rectangular frame-shaped frame base 2 by an upper horizontal cylinder frame 26 and a lower horizontal cylinder frame 27. In each vertical cylinder frame 14 of the frame base 2, large-diameter cylindrical portions 25 of the left and right handle column portions 22, 22 are inserted so as to be slidable in the vertical direction. And the lower end part of the large diameter cylinder part 25 of the left and right handle column parts 22, 22 protrudes downward from the lower end of each vertical cylinder frame 14.

  In addition, a substantially rectangular support plate 143 is integrally projected at lower ends of the left and right vertical cylindrical frames 14 and 14 of the frame base 2 as pivotal portions that project forward. The rear end of the upper end portion of the front wheel leg portion 11 is pivotally supported at the lower portion of each support plate 143 via a shaft 144 extending in the left-right direction as a pivotal support portion. A front extending portion 111 extending forward from the rear end is provided at the upper end of the left and right front wheel leg portions 11, 11. In addition, a support portion 145 as a pivot portion that bulges outward in the left-right direction is integrally provided at the lower end portion of each vertical cylindrical frame 14 of the frame base 2. The upper end portion of the rear wheel leg portion 12 is pivotally supported by each support portion 145 via a shaft 146 extending in the left-right direction as a pivotal support portion.

  The left and right front wheel leg portions 11 and 11 are connected to the substantially middle position in the vertical direction of the left and right rear wheel leg portions 12 and 12 via the left and right individual link mechanisms 31 and 31 at the substantially middle position in the vertical direction, respectively. Yes. Each link mechanism 31 includes a first link plate 311, a second link plate 312, and a connecting shaft 313. One end of the first link plate 311 is pivotally supported on the first link pivot shaft 32 of the front wheel leg portion 11, and the other end is coupled to the other end of the second link plate 312 via the coupling shaft 313. One end of the second link plate 312 is pivotally supported on the second link pivot shaft 33 of the rear wheel leg portion 12. A lower end of the large-diameter cylindrical portion 25 is pivotally supported on the connecting shaft 313. That is, each front wheel leg portion 11 and each rear wheel leg portion 12 is moved in the upward direction of the large-diameter cylindrical portion 25 with respect to each vertical cylindrical frame 14 so that the connecting shaft 313 is moved upward. On the other hand, the connecting shaft 313 is moved downward by the downward sliding movement of the large-diameter cylindrical portion 25 with respect to each vertical cylindrical frame 14 so as to be in the closed leg position in the folded state shown in FIG. Each link mechanism 31 rotates in conjunction with each other.

  FIG. 5 is a cross-sectional view schematically illustrating a locked state of the handle column 22 of the handcart A by a slide lock pin, and FIG. 6 is a plan view of the large-diameter cylindrical portion 25 of the handcart A viewed from the axial direction. Show. 5 and 6, a pair of guide protrusions 251 and 251 that slidably guide the small-diameter cylindrical portion 24 on one side in the long-diameter direction are provided on the inner peripheral surface of the large-diameter cylindrical portion 25. . A gap 252 is formed between the small diameter cylindrical portion 24 and the other side in the long diameter direction within the large diameter cylindrical portion 25.

  FIG. 7 is a cross-sectional view schematically illustrating the sliding fixed state of the small diameter cylindrical portion 24 and the large diameter cylindrical portion 25 of the handcart A. As shown in FIG. 7, three pairs of first pin insertion holes 241 (only one pair is shown in FIG. 7) are formed in the longitudinal direction of the small diameter cylindrical portion 24, that is, the vertical direction.

  The lower end portion of each large-diameter cylindrical portion 25 includes a pair of second pin insertion holes 253 and 253, one upper lock pin insertion hole 254, and one lower lock pin insertion hole 255.

  The pair of second pin insertion holes 253 and 253 are formed so as not to pass through the center of the large-diameter cylindrical portion 25, so that the central axis thereof is orthogonal to the central axis of the small-diameter cylindrical portion 24 at the upper end of the large-diameter cylindrical portion 25. ing. Then, the large-diameter cylindrical portion 25 slides the small-diameter cylindrical portion 24 so that one of the pair of first pin insertion holes 241 of the three pairs of small-diameter cylindrical portions 24 is provided at the position of the second pin insertion hole 253. The small diameter cylindrical portion 24 is moved up and down by passing a small diameter cylindrical portion fixing pin 362, which will be described later, from one second pin insertion hole 241 to the other second pin insertion hole 253 through the first pin insertion hole 241. Can be fixed so as not to. That is, the handle 21 can be fixed at any one of the three upper and lower height positions.

  When the front wheel leg portions 11 and 11 and the rear wheel leg portions 12 and 12 are in the normal closed position, the upper lock pin insertion hole 254 is inserted into a gap 252 through a pin tip portion 289 of a slide lock pin 281 described later. The large-diameter cylindrical portion 25 is drilled at a position where the large-diameter cylindrical portion 25 enters and slide-locks. Further, the lower lock pin insertion hole 255 is inserted into the gap 252 when the front end portion 289 of the slide lock pin 281 is inserted when each front wheel leg portion 11 and each rear wheel leg portion 12 are in the normal open position. The large-diameter cylindrical portion 25 is drilled at a position where it slides into and locks.

  The lower ends of the front wheel leg portions 11 are connected to each other by a first leg connecting portion 34 extending in the left-right direction between the both 11 and 11. Each front wheel 15 is a caster wheel that can rotate around the axis of the front wheel leg 11. In addition, each rear wheel leg portion 12 is connected by a second leg connecting portion 35 that extends in the left-right direction between the rear leg portions 12. Each rear wheel 16 is a fixed wheel that cannot rotate about the axis of the rear wheel leg 12.

  Then, the left and right front wheel legs 11, 11 and the rear wheel legs 12, 12 are opened and closed by the rotation of the first link plates 311 and the second link plates 312.

  The large-diameter cylindrical portion 25 is provided with a small-diameter cylindrical portion fixing member 36 that fixes the small-diameter cylindrical portion 24 to the large-diameter cylindrical portion 25 in a non-slidable state. As shown in FIG. 7, the small-diameter cylindrical portion fixing member 36 includes a substantially C-shaped member body 361 made of a synthetic resin that is fitted into the large-diameter cylindrical portion 25 while being elastically deformed, and a small-diameter cylindrical portion fixing pin. 362. The small-diameter cylindrical portion fixing member 36 is fitted from the outside while elastically deforming the member main body 361 to the upper end portion of the large-diameter cylindrical portion 25, and the small-diameter cylindrical portion fixing pin 362 is inserted from one second pin insertion hole 253. By passing through the pair of matched first pin insertion holes 241 to the other second pin insertion hole 253, the small diameter cylindrical portion 24 is fixed to the large diameter cylindrical portion 25 in a non-slidable state. Yes.

  A cylindrical cap 37 is fitted on the outer side of the small diameter cylindrical portion fixing member 36. That is, the cylindrical cap 37 is loosely fitted to the small diameter cylindrical portion 24, and is pushed down from above the small diameter cylindrical portion fixing member 36 attached as described above toward the large diameter cylindrical portion 25, thereby reducing the small diameter cylindrical portion. The fixing member 36 is externally fitted on the member main body 361.

  In addition, the cylindrical cap 37 is fitted on the member main body 361 as described above, and the distal end of the small-diameter cylindrical portion fixing pin 362 is engaged with the locking hole 371 provided on the peripheral wall thereof. Withdrawal is prevented. Further, the cylindrical cap 37 functions as an upper lock position restricting protrusion, and each front wheel leg portion 11 and each rear wheel leg portion 12 are in a closed state, and a slide lock pin 281 described later is provided. When the pin tip portion 289 and the upper lock pin insertion hole 254 of the large-diameter cylindrical portion 25 coincide with each other, they come into contact with the upper ends of the vertical cylindrical frames 14.

  Each vertical cylinder frame 14 has a cylindrical axis center of each vertical cylinder frame 14 in a state where at least the front wheel legs 11 and the rear wheel legs 12 are in the open position and the front wheels 15 and the rear wheels 16 are installed on a horizontal plane. The inclination with respect to the horizontal plane is provided so as to coincide with the bending angle with the vicinity of the midway portion at the lower end portion of the large-diameter cylindrical portion 25. That is, when the large-diameter cylindrical portion 25 is guided by each vertical cylindrical frame 14, the lower end portion of each large-diameter cylindrical portion 25 slides up and down while maintaining its cylindrical central axis in the vertical direction. .

  8 is an exploded perspective view of the upper horizontal cylinder frame 26 and the slide lock pin of the handcart A, FIG. 9 is a rear view near the slide lock pin of the upper horizontal cylinder frame 26, and FIG. 10 is a perspective view of the upper horizontal cylinder frame 26. Each is shown. 8 to 10, the upper horizontal cylinder frame 26 includes an opening / closing mechanism for opening and closing each front wheel leg portion 11 and each rear wheel leg portion 12 between the open leg position and the closed leg position. The opening / closing mechanism includes a pair of left and right slide lock pins 281 and 281 housed in the upper horizontal cylinder frame 26, a fixing lever 282, and a pin operation lever 283. The opening / closing mechanism includes a coil spring 284 that is housed in the upper horizontal cylinder frame 26 and biases each slide lock pin 281 outward in the left-right direction. Further, a pair of left and right first long holes 261 and 261 are formed in the upper horizontal cylinder frame 26.

  The fixing lever 282 is fixed to the upper horizontal cylinder frame 26 with screws 285. The opening / closing mechanism includes a cylindrical portion 286 that is rotatably fitted to the upper horizontal cylinder frame 26. The cylindrical portion 286 has a pair of left and right second elongated holes 287 and 287 that are substantially C-shaped. It has been drilled. The pin operation lever 283 is screwed into the slide lock pin 281 with a screw 288 via the second long hole 287 and the first long hole 261.

  That is, the two slide lock pins 281 and 281 are always urged by the coil spring 284 in the upper horizontal cylinder frame 26 so that the pin tip 289 protrudes out of the upper horizontal cylinder frame 26.

  When the pin operating lever 283 is pressed in the direction of the fixed lever 282, the screw 288 moves in the direction of the arrow in FIG. 9 along the first long hole 261 due to the inclination of the second long hole 287, and the slide lock pins 281 and 281 are moved. Retreats. As a result of the retreat, as shown by a two-dot chain line in FIG. 5, the pin tip portion 289 enters the side of the upper horizontal cylinder frame 26 and engages with the periphery of the lower lock pin insertion hole 255 (or the upper lock pin insertion hole 254). Is released, and the large-diameter cylindrical portion 25 can be slid in the vertical direction. If the pin tip 289 is in the position of the lower lock pin insertion hole 255 (or the upper lock pin insertion hole 254) in a state where the pressure on the pin operation lever 283 is released, the lower lock pin insertion hole 255 (or The large-diameter cylindrical portion 25 enters the upper lock pin insertion hole 254) to be in the slide lock state.

  11 is a perspective view of the wheelbarrow A in which the posture in which the seat is converted into the seating position is viewed obliquely from the front, FIG. 12 is a side view of the wheelbarrow A viewed from the side, and FIG. 13 is a view of the wheelbarrow A from the front. Each front view is shown. 11 to 13, the small-diameter cylindrical portion fixing member 36 and the cylindrical cap 37 that fix the small-diameter cylindrical portion 24 to the large-diameter cylindrical portion 25 are removed.

  As shown in FIGS. 11 to 13, between the left and right vertical cylindrical frames 14, 14, there is provided a seat 41 that can be seated when tired. The seat portion 41 includes left and right seat frames 42 and 42 that are rotatably supported on shafts 421 whose base ends extend in the left-right direction on the upper portion of the support plate 143 of each vertical cylinder frame 14. Each seat frame 42 includes a seat front end frame 422 that extends along both the left and right sides and connects the tip ends thereof, and a seat connection frame 423 that connects substantially the middle portions of each seat frame 42 in the longitudinal direction. The seat 41 has a storage position (position shown in FIGS. 1 to 4) standing along the vertical cylinder frame 14 in front of each vertical cylinder frame 14 and a front extension of the upper end of each front wheel leg 11. It is converted into a seating position (position shown in FIGS. 11 to 13) that can sit down and lie forward along the installation part 111. In this case, when the seat portion 41 is converted into the seating position, each seat frame 42 may be brought into contact with the front extending portion 111 to maintain the conversion posture.

  A basket frame 43 for mounting a storage basket 52 described later is housed between the front wheel legs 11. The basket frame 43 extends upward toward an opening 520 (described later) while supporting the left and right ends of the rear surface of the storage basket 52, and the upper end thereof extends in the left-right direction near the front end of each seat frame 42. Left and right upper and lower frames 432 and 432 are rotatably supported via extending shafts 431, respectively. The rear ends of the left and right front and rear frames 433 and 433 extending in the front-rear direction are integrally attached to the lower ends of the upper and lower frames 432, respectively. The left and right ends of the front end frame 434 extending in the left-right direction are integrally attached to the front ends of the front and rear frames 433, respectively. Further, between the upper ends of the upper and lower frames 432, the left and right ends of the upper frame 435 extending in the left-right direction are connected to each other, and the lower ends of the upper and lower frames 432 (rear ends of the front and rear frames 433) are connected to each other. The left and right ends of the lower end frame 436 extending in the left-right direction are connected to each other.

  Furthermore, between the lower position located slightly below the connection point with the upper end frame 435 at the upper end of each upper and lower frame 432 and the lower part of the support plate 143 at the lower end of each vertical cylinder frame 14, Each arm 44 is provided. Each arm 44 is rotatably supported at one end (upper end in FIG. 1) via a shaft 441 extending in the left-right direction with respect to the lower position of the upper end of each upper and lower frame 432 and the other end (FIG. 1). The lower end of the vertical cylindrical frame 14 is rotatably supported by a shaft 144 below the support plate 143 at the lower end of each vertical cylinder frame 14.

  A support plate 143 of one of the left and right support plates 143 and 143 (right side in the figure) is provided with a stay 45 that is fixed by upper and lower shafts 421 and 441 and protrudes upward. A restraint 40 is provided at the tip (upper end) of the stay 45. The restraining device 40 includes a pin 451 projecting outward from the base of one of the left and right seat frames 42, 42 (right side in the figure) and a shaft 453 extending in the left-right direction on the stay 45. A hook 452 that is rotatably supported and is detachably engaged with the pin 451 is provided. The hook 452 is urged in an engaging direction with respect to the pin 451 by a coil spring (not shown), and an engaging / disengaging operation with respect to the pin 451 can be performed by an operation portion 454 protruding rearward from the shaft 453.

  FIG. 14 is a perspective view of the posture in which the seat 41 is converted into the storage position with the seat cover and the storage basket attached to the handcart A, and FIG. 15 is a side view of the hand cart A viewed from the side. FIG. 16 is a side view of the handcart A viewed from the side with the leg closed, and FIG. 17 is a front view of the handcart A viewed from the front. 18 is a perspective view of the posture in which the handcart A is opened and the seat portion 41 is converted into the seating position as viewed obliquely from the front, FIG. 19 is a side view of the handcart A viewed from the side, and FIG. The front view which looked at the wheelbarrow A from the front is each shown. 14 to 20, the small diameter cylindrical portion fixing member 36 and the cylindrical cap 37 that fix the small diameter cylindrical portion 24 to the large diameter cylindrical portion 25 are removed.

  As shown in FIGS. 14 to 20, the seat portion 41 includes a seat cover 51 that covers each seat frame 42, the seat tip frame 422, and the seat connection frame 423. The seat cover 51 is formed by covering a core material made of a plate material such as plywood with a decorative sheet made of a resin sheet or the like. On the back side of the stool cover 51, a tip side cover material 511 that forms a bag shape with the tip side portion of the stool cover 51 is attached, and covers the stool tip frame 422 together with the tip of each seat frame 42 from the tip side. Yes. Further, a base end side cover material (not shown) extending from the base end is attached to the back surface side of the seat cover 51. The base end side cover member is wound around the lower horizontal cylinder frame 27 and attached by a snap button (not shown), and the front end side cover member 511 is detached from the front end portion of the seat front end frame 422 and each seat back frame 42. Is preventing.

  The basket frame 43 is attached with a storage basket 52 for storing a load in the main body 521 through an opening 520 that opens upward. The storage basket 52 is made of a flexible material such as artificial leather or a cloth material covering the surface of the resin sheet. The storage basket 52 is provided with a lid 522 extending forward from the upper edge of the back surface of the opening 520 and is locked to the main body 521 by a Velcro (not shown). The storage basket 52 is provided with an upper edge cover member 523 extending rearward from the upper edge of the back surface of the opening 520. The upper edge cover member 523 is attached to the upper end frame 435 by a snap button (not shown).

  Further, a front end side cover member 524 that forms a bag shape with the storage basket 52 is attached to the lower surface of the storage basket 52 and covers the front end frame 434 together with the front and rear frames 433 from the front. A rear end cover member 525 extending from the rear end is attached to the lower surface of the storage basket 52. The front end of the rear end side cover member 525 is attached to the rear end of the front end side cover member 524 with a snap button (not shown) through the lower end frame 436 from below, and the front end side cover member 524 from the front end frame 434 is attached. Prevents withdrawal.

  Here, the usage method of the handcart A is demonstrated.

  First, the user walks while holding the handle 21 in the use state in which the left and right front wheel leg portions 11 and 11 and the left and right rear wheel leg portions 12 and 12 shown in FIGS. To do.

  Next, the lid or the like is opened for the luggage or the like and stored in the main body 521 of the storage basket 52 through the opening 520.

In the non-use state, the pin operating lever 283 is pushed to the lower fixing lever 282 side, the left and right slide lock pins 281 and 281 are retracted, and the pin tip portion 289 is inserted into the upper lock pin insertion hole 254. Is released and the handle 21 is pushed down. In addition, the pressing to the pin operation lever 283 is released during the depression.
By pushing down the handle 21 as described above, the small-diameter cylindrical portion 24 and the large-diameter cylindrical portion 25 are pushed down in conjunction with each other, and the connecting shaft 313 is also pushed down. When the connecting shaft 313 is pushed down, the first link plate 311 rotates about the first link pivot shaft 32 so that the connecting shaft 313 side of the first link plate 311 and the second link plate 312 moves downward. The second link plate 312 rotates about the second link pivot shaft 33.

As shown in FIGS. 3 and 17, the front wheel leg portion 11 is moved toward the rear wheel leg portion 12 around the shaft 144 by the rotation of the first link plate 311 and the second link plate 312. 12 are pivoted about the shaft 146 toward the front wheel leg 11 side to be in a closed leg state.
When the lower end of the cylindrical cap 37 is pushed down until it comes into contact with the upper end of the vertical cylindrical frame 14, the pin tip 289 is aligned with the lower lock pin insertion hole 255, and the clearance through the lower lock pin insertion hole 255 is applied by the biasing force of the coil spring 284. It enters into 252 and is locked in the closed leg state.

Further, when changing from the closed leg state to the open leg state, the pin operating lever 283 is pushed to the lower fixing lever 282 side, the slide lock pin 281 is retracted, and the pin tip portion 289 is inserted into the lower lock pin insertion hole 255. Is released and the handle 21 is pulled up. Note that the pressing on the pin operating lever 283 is released during the pulling up.
By pulling up the handle 21 as described above, the small-diameter cylindrical portion 24 and the large-diameter cylindrical portion 25 are pulled upward in conjunction with each other, and the connecting shaft 313 is also lifted upward. When the connecting shaft 313 is pulled up, the first link plate 311 rotates about the first link pivot shaft 32 so that the connecting shaft 313 side of the first link plate 311 and the second link plate 312 moves upward. The second link plate 312 rotates about the second link pivot shaft 33.

As shown in FIGS. 2 and 15, the front wheel leg portion 11 moves away from the rear wheel leg portion 12 about the shaft 144 by the rotation of the first link plate 311 and the second link plate 312. The leg portions 12 are rotated about the shaft 146 in the direction away from the front wheel leg portion 11 to be in the open leg state.
When the vertical cylinder frame 14 is pushed up, the pin tip 289 coincides with the upper lock pin insertion hole 254 and enters the gap 252 through the upper lock pin insertion hole 254 by the urging force of the coil spring 284 and is locked in the open leg state. Is done.

  In addition, when adjusting the height position of the handle 21 at the open leg position so as to match the height and physical characteristics of the user, the cylindrical cap 37 is slid to the handle 21 side, and the small-diameter cylindrical portion fixing member 36 is adjusted. Is exposed to the outside. Thereafter, the small-diameter cylindrical portion fixing pin 362 is pulled out by holding the member main body 361 so that the small-diameter cylindrical portion 24 is slidable with respect to the large-diameter cylindrical portion 25. Then, the small-diameter cylindrical portion 24 is slid with respect to the large-diameter cylindrical portion 25 until any one of the pair of first pin insertion holes 241 at which the handle 21 has a desired height is aligned with the second pin insertion hole 253. The small-diameter cylindrical portion fixing member 36 is fixed so that the small-diameter cylindrical portion 24 does not slide again, and the cylindrical cap 37 is pushed down to be fitted to the outside of the small-diameter cylindrical portion fixing member 36.

  Furthermore, when tired from walking, the brake lever is operated and the rear wheel 16 is locked by the brake 17, and as shown in FIGS. Then, by disengaging the hook 452 from the pin 451, the seat portion 41 can be seated by each seat frame 42 being rotated about its base end shaft 421 to be converted into a seating position.

  At this time, when the seat 41 is converted into the storage position, the storage basket 52 moves the main body 521 in the vertical direction along the vertical frames 432 of the basket frame 43 with the opening 520 opened upward. It is arranged with the posture extended to. On the other hand, when the seat portion 41 is converted from the storage position to the seating position, the main body portion 521 is disposed in a posture in which the main body portion 521 extends in the vertical direction along the upper and lower frames 432 with the opening portion 520 opened upward. Yes.

  Further, the basket frame 43 rotates around the shaft 431 near the tip of each seat frame 42 in conjunction with the rotation of each seat frame 42, and the lower position of the upper end portion of each upper and lower frame 432 is set by each arm 44. The storage basket 52 is moved so as to be in a forward leaning posture while the body 521 is extended in the vertical direction while being slightly pulled backward. At this time, since the upper end of each upper and lower frame 432 is supported by each seat frame 42 at a position spaced from the distal end of the seat portion 41 toward the proximal end, the seat portion 41 is converted to the seating position when the seat portion 41 is converted to the seating position. The opening area of about one third of the opening 520 is blocked by the portion 41.

  Thus, the upper end of the storage basket 52 is freely rotatable via the shaft 431 at the distal end portion of each seat frame 42 whose base end is supported via the shaft 421 on the support plate 143 of each vertical cylinder frame 14. The main body 521 is attached to each of the upper and lower frames 432 supported by the upper and lower frames 432, and a lower shaft 144 of the support plate 143 at the lower end of each vertical cylinder frame 14 is placed at a lower position of the upper end of each upper and lower frame 432. One end of the arm 44 whose other end is rotatably supported via the shaft 441 is rotatably supported via the shaft 441. In this case, the length from one end of each arm 44 to the other end supported by the upper end of each upper and lower frame 432 is greater than the length from the base end of each seat frame 42 to the support point between the upper end of each upper and lower frame 432. Also set to a slightly shorter length.

  For this reason, when the seat 41 is converted into the storage position, the storage basket 52 is configured such that the main body 521 extends in the vertical direction along the upper and lower frames 432 with the opening 520 opened upward. It is arranged with. On the other hand, when the seat portion 41 is converted from the storage position to the seating position, the lower position of the upper end portion of each upper and lower frame 432 that rotates in conjunction with the rotation of each seat frame 42 is slightly pulled backward by each arm 44. The storage basket 52 is moved in a forward leaning posture while the main body 521 is extended in the vertical direction with the opening 520 opened upward. As a result, the posture of the storage basket 52 is hardly changed between the storage position and the seating position of the seat portion 41, and the main body portion 521 is always arranged so as to extend vertically. It is possible to prevent the baggage stored in the 521 from lying down and store the baggage that is easily deformed or the baggage that is likely to leak in the main body 521 with peace of mind.

  Moreover, the rotation of the basket frame 43 around the shaft 431 at the upper end of the upper and lower frame 432 is restricted by the arm 44 between the lower position at the upper end portion of each upper and lower frame 432 and the lower portion of the support plate 143 of each vertical cylinder frame 14. This is very advantageous in maintaining the posture of the storage basket 52.

  Further, the upper end of each upper and lower frame 432 is supported on each seat frame 42 at a position spaced from the distal end of the seat portion 41 toward the proximal end, and when the seat portion 41 is converted into the seating position, approximately three of the openings 520 are provided. Since the opening area of about one-third is blocked, when the seat portion 41 is converted to the seating position, the opening area of about one third of the opening portion 520 is blocked by the seat portion 41 for storage. The basket 52 is less likely to get in the way when seated, so that a stable seating posture can be achieved and the storage basket 52 can be enlarged.

  Further, the length from one end of each arm 44 to the other end supported by the upper end of each upper and lower frame 432 is longer than the length from the base end of each seating frame 42 to the support point between the upper end of each upper and lower frame 432. Since the length is set to be slightly short, when the seat portion 41 is converted from the retracted position to the seated position, each arm 44 slightly pulls the lower position of the upper end portion of each upper and lower frame 432 rearward, and the main body portion 521. Can be arranged in a slightly forward tilted posture extending vertically.

  Further, a restraint 40 that restrains one of the seat frames 42 so as not to rotate when the seat portion 41 is converted into the storage position is provided on the stay 45 of one support plate 143 at the lower end of the vertical cylinder frame 14. Therefore, the seat portion 41 can be reliably restrained at the storage position, and the storage basket 52 is also held in a posture so that the luggage can be smoothly taken in and out from the opening portion 520 into the main body portion 521.

  In addition, this invention is not limited to the said embodiment, The other various modifications are included. For example, in the above-described embodiment, the small-diameter cylindrical portion 24 has a perfect circle shape and the large-diameter cylindrical portion 25 has an elliptical shape. However, as shown in FIGS. While the concave section 611 having a continuous arcuate cross section is formed, the large-diameter cylindrical portion 62 is formed in a perfect circular section, and a gap 63 continuous in the axial direction is formed between the concave section 611 and the inner wall surface of the large-diameter cylindrical section 62. You may make it form. In FIG. 21, 622 indicates one of an upper lock pin insertion hole and a lower lock pin insertion hole. In FIG. 22, 613 indicates a pair of first pin insertion holes, and 621 indicates a pair of second pin insertion holes. Show. The pair of second pin insertion holes 621 and 621 do not intersect the recess 611 and are formed at the upper end of the large-diameter cylindrical portion 62 so that the central axis thereof is orthogonal to the central axis of the large-diameter cylindrical portion 62. .

  Further, in the present embodiment, the arms 44 are provided between the lower position at the upper end of each upper and lower frame 432 and the lower portion of the support plate 143 of each vertical cylinder frame 14, but each arm is not necessarily required. However, the upper ends of the upper and lower frames 432 of the basket frame 43 may be supported only on the seat frames 42 of the seat portion 41 via the shaft 431.

  Further, in the present embodiment, the upper ends of the upper and lower frames 432 are supported by the respective seat frames 42 at positions spaced from the distal end of the seat portion 41 toward the base end side, and when the seat portion 41 is converted into the seating position. Although the opening area of about one third of the opening portion 520 is blocked by the seat portion 41, when the seat portion 41 is converted into the sitting position, the opening area of the opening portion 520 is slightly increased by the seat portion 41, for example, The opening area of about half of the opening 520 may be blocked.

  In the present embodiment, the restraining device 40 is provided at the tip of the stay 45 provided on one of the left and right support plates 143 and 143, but the stay is provided on both the left and right support plates 143 and 143. And a restraining tool may be provided at the tip of each stay. In this case, the seat portion can be reliably restrained by the storage position, and the posture of the storage basket is also securely held, so that the luggage can be smoothly taken in and out from the opening portion into the main body portion.

  In the present embodiment, the height of the handle 21 can be changed in three steps, but the height of the handle may be changed in two steps or four or more steps.

  Furthermore, although the handcart A is used as a silver car in the present embodiment, it may be a handcart such as a shopping car.

  Further, in the present embodiment, the basket frame 43 is moved downward while slightly pulling the lower position of the upper end of each upper and lower frame 432 backward by each arm 44, and the main body 521 is tilted forward while extending in the vertical direction. The storage basket 52 was moved so as to be in a relaxed posture, but the basket frame was moved downward while slightly projecting the lower position of the upper end of each upper and lower frame forward by each arm, and the main body 521 was moved up and down. You may make it move a storage basket so that it may become a back leaning attitude | position, extending in a direction.

  Further, in the present embodiment, each front wheel leg portion 11 and each rear wheel leg portion 12 are moved to the open leg position and the closed leg position in conjunction with the vertical sliding movement of the large diameter cylinder part 25 with respect to each vertical cylinder frame 14. However, the rotation of the front and rear leg portions of the front wheel legs and rear wheel legs in relation to the open and closed leg positions is linked to the vertical sliding movement of the large-diameter tube portion with respect to each vertical tube frame. The front wheel legs and the rear wheel legs rotate between the open leg position and the closed leg position in conjunction with the bending operation of the large-diameter cylinder part with respect to each vertical cylinder frame. It may be. In addition, the operation of the large-diameter cylinder portion with respect to each vertical cylinder frame and the rotation operation between the open leg position and the close leg position of each front wheel leg part and each rear wheel leg part are performed individually without being interlocked. It may be.

11 Front wheel leg part 111 Front extension part 12 Rear wheel leg part 14 Vertical cylinder frame 144 Shaft (Pivot part)
146 Axis (Pivot)
15 Front wheel 16 Rear wheel 21 Handle 22 Handle column 26 Upper horizontal cylinder frame (horizontal frame)
27 Lower horizontal cylinder frame (horizontal frame)
40 Constraint tool 41 Seat portion 42 Seat frame 432 Upper and lower frames 44 Arm 52 Storage basket 520 Opening portion 521 Body portion A Wheelbarrow

Claims (3)

Left and right front wheel legs that support the front wheels for rolling freely at the lower end, left and right rear wheel legs that support the rear wheels for rolling, and left and right handle columns that support the handle from below And the handle post portions are slidably supported in the vertical direction, and the front wheel leg portions and the rear wheel leg portions can be selected between an open leg position in use and a closed leg position in a folded state. Left and right vertical cylinder frames having a pivotal support at the lower end for pivotally supporting the upper ends of the front wheel legs and the rear wheel legs, and the vertical direction between the upper and lower ends of the vertical cylinder frames. A wheelbarrow with upper and lower horizontal frames that extend and connect to
A seat that is converted into a retracted position that stands up along each of the vertical cylinder frames and a seated position that can be seated by lying forward, and an opening that is accommodated between the front wheel legs and opens upward A storage basket for storing the luggage in the main body is provided,
The seat portion includes left and right seat frames extending along both left and right sides, and the base ends of the seat frames are rotatably supported by the vertical cylinder frames, respectively.
The storage basket includes left and right upper and lower frames that extend upward toward the opening while supporting the left and right ends of the rear surface, and the upper ends of the upper and lower frames are freely rotatable at the front ends of the seat frames. with it is supported in,
The storage basket includes left and right arms each having one end rotatably supported by each front wheel leg, and the other end of each arm is rotatably supported by each upper and lower frame,
The other end of each arm is supported rotatably on the upper end of each upper and lower frame,
The length from one end to the other end of each arm is set to be slightly shorter than the length from the base end of each seating frame to the upper end of each upper and lower frame. Wheelbarrow to do. The upper end of each of the upper and lower frames is located closer to the proximal side from the distal end of the seat so that when the seat is converted to the seating position, the opening area of approximately one third to approximately half of the opening is closed. The handcart according to claim 1, wherein the handcart is supported by each of the seat frames at a spaced position . The restraint tool which restrains at least one of each said seat frame so that it cannot rotate when said seat part is changed into a storing position is provided in each said vertical cylinder frame. The described wheelbarrow.

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