JP2010264889A - Wheeled cart - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wheeled cart capable of enhancing the stability against the backward toppling of the wheeled cart to be stored in a self-standing manner with its forwardly inclined posture during the storage in the wheeled cart, and folding a bottom plate as a cargo bed of the wheeled cart in a folding direction which is the same back direction as the folding direction of the bottom plate in a conventional wheeled cart. <P>SOLUTION: In the wheeled cart, its cargo bed can be folding in the main caster direction on the rear side, and a main caster on the front side can be moved in the main caster direction on the rear side. The cargo bed is folded in the main caster direction on the rear side. When the main caster on the front side is moved in the main caster direction on the rear side, an auxiliary caster is projected forward of the main caster on the front side. When the cargo bed is folded in the main caster 8 side on the rear side, and a main caster 7 on the front side is moved in the main caster 8 direction on the rear side, at least one main caster in the main caster 7 on the front side is projected backward of the main caster 8 on the rear side. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a carriage used for transporting articles, and more particularly to a carriage that can be stored in a self-supporting state.

  Conventionally, carts used for transporting articles are configured so that they can be folded even while being kept in a self-supporting state so as not to take up space as much as possible during storage or vehicle transport, for example, according to the invention of the present applicant. There is a cart (see Patent Document 1).

  This cart is configured to support the cart that is self-supporting by folding the cargo bed in a forward tilted position by the auxiliary caster, so it is close to the cart that folded the bottom plate that is firmly made to load the cargo So that the center of gravity of the self-supporting carriage is as far forward as possible.

  In this way, when folding the carriage, the bottom plate as a loading platform is folded up on the rear side of the carriage, that is, the back frame member side in an upright state. Since the member is folded upright on one side of the member, when the main carriage is folded, there is a case that it is greatly confused and the work does not proceed smoothly but is delayed.

Japanese Patent No. 3927220 (pages 1-9, FIGS. 1-12)

  The present invention makes it possible to extremely reduce the risk of falling to the rear side during storage in a cart that can be stored independently in a forward tilted posture, and the folding direction of the bottom plate that serves as the loading platform of the cart is the folding of the bottom plate in the conventional cart. A cart that can be folded back in the same direction as the direction can be provided.

  In order to solve the above-described problems, a cart according to the present invention is provided with a loading platform on which a load is placed, a main caster for moving a cart arranged before and after the cart, and an auxiliary caster for storing the cart. Can be folded in the direction of the main caster on the side, and the main caster on the front side can be moved in the direction of the main caster on the rear side. When the caster is moved in the direction of the main caster on the rear side, the auxiliary caster is configured to protrude forward from the main caster on the front side, and the cargo bed is folded in the direction of the main caster on the rear side. When the front main caster is moved in the direction of the rear main caster, at least one main caster of the front main caster is moved to the rear main caster. At least one front side that protrudes rearward from the main caster on the rear side when the carrier is folded and the cart is tilted backward in a state where the cart is self-supporting. It is supposed to be able to maintain independence by the main caster.

  The loading platform is composed of a bottom plate member, left and right side frame members, and a back frame member. The bottom plate member can be folded inside the back frame member, and each of the left and right side frame members is also inside the back frame member. It is designed to be foldable.

  Further, the front main caster is configured to move in synchronization with the respective folding operations of the left and right side frame members.

  Further, when the left and right side frame members are folded inside the back frame member, the left and right side frame members are folded so as to be positioned in front of the bottom plate member folded inside the back frame member.

  In addition, when the carts are folded and self-supported carts are stacked and arranged, the front main casters that protrude rearward from the rear main casters are folded in the rear carts that are stacked and arranged. It is configured to be able to enter the lower part of the loading platform.

  According to the cart according to the present invention, the cart is folded at least in the direction of the main caster on the rear side by folding the cargo bed in the direction of the main caster on the rear side and moving the main caster on the front side of the cart to the vicinity of the main caster on the rear side. The main caster protrudes rearward from the rear main caster, and the auxiliary caster protrudes forward from the front main caster moved together by the movement of the front main caster.

  Therefore, the folding direction of the bottom plate, which is the loading platform, can be folded to the rear side of the cart that many people are accustomed to, and the center of gravity of the cart in the state where the loading platform is folded and the cart is free-standing is more backward than before. As described above, even when the cart is moved and the risk of falling to the rear side increases, when the cart is folded into a self-supporting state, at least one main caster in the front main caster is behind the rear main caster. Therefore, even when the self-supporting carriage tilts backward, it can be kept independent by at least one main caster in the front main caster that projects rearward from the rear main caster. The tilted cart can be prevented from falling.

  Further, since the auxiliary caster supports a cart that is self-supporting with the center of gravity biased forward by folding the loading platform from the front of the cart, the auxiliary caster can prevent the cart from falling forward.

  And even if it is a single contact, the self-supporting stable state may collapse and it may become easy to fall, for example, even if the carriage bed of the carriage is made of resin material, the carriage falls over from the rear main caster In addition, at least one main caster of the front main caster protruding rearward can be prevented, and the cart can be prevented from tipping forward by the auxiliary caster. it can.

  Furthermore, when a plurality of self-supporting carts are folded and stacked, the front main caster that protrudes rearward from the main caster on the rear side of the rear cart, Since it can enter the lower part, the carts can be stacked with no gaps, and can be stacked straight forward, so that no wasteful space is required for storing and transporting the carts.

The perspective view which shows the Example of the trolley | bogie which concerns on this invention. The perspective view which shows the other side of the trolley | bogie shown in FIG. The side view of the folded trolley | bogie. The side view of the trolley | bogie which shows the state at the time of storage. The side view which shows the state which piled up the two trolley | bogies. The side view which shows the state which piled up many trolleys. The perspective view which shows the Example of a trolley | bogie. The partial cross section figure which shows the state of the auxiliary caster part when the cart is piled up. The perspective view which showed the folding operation | movement while showing the other form of a trolley | bogie.

  Hereinafter, a cart according to the present invention will be described with reference to the accompanying drawings.

  1 and 2 are perspective views showing a cart according to the present invention and a folded state of the cart, and FIG. 1 shows a state seen from the back frame 5 side which is the rear side of the cart. FIG. 2 shows a state when viewed from the side of the folded left and right side frames (side frame 3 and side frame 4) on the front side of the carriage.

  The cart 1 includes a bottom plate 2 member, left and right side frames (side frames 3 and 4), a back frame 5 member, and front and rear main casters (front main casters 7 and rear main casters 8) serving as moving wheels. And an auxiliary caster 10 (see FIG. 2) for keeping the folded cart 1 safely and independently.

  According to FIGS. 1 and 2, in the folded state of the carriage 1, the bottom plate 2 serving as a loading platform is folded and positioned in a state of standing on the front side of the back frame 5, and the side frame 4 is on the front side of the back frame 5. The side frame 3 is folded and positioned on the front side of the side frame 4, and is positioned on the front side of the bottom plate 2 folded in a standing state.

  And in each frame member (the side frame 3, the side frame 4, and the back frame 5) for preventing load collapse provided above the bottom plate 2 of the cart 1 described above, the side frame 3 and the side on both sides of the back frame 5, respectively. The frame 4 is connected by a connecting tool 6 so that it can be bent. The back frame 5 side of the connecting tool 6 is fixed to the back frame 5, and the side frame 3 and the side frame 4 side are the side frame 3 and the side frame. Since 4 passes through the connecting tool 6, the side frame 3 and the side frame 4 can freely rotate.

  Further, front and rear main casters serving as moving wheels are provided on the front, rear, left and right of the carriage 1, respectively. One of the front main casters 7 in this main caster is at the front end of the side frame 3 member, and the other is the front end of the side frame 4 member. Further, the rear main caster 8 is fixed to both the left and right sides of the back frame 5 member.

  Then, as described above, the bottom plate 2 serving as a loading platform is folded while standing on the front side of the back frame 5, and the side frame 4 is folded on the front side of the bottom plate 2 folded while standing on the front side of the back frame 5. By folding the side frame 3 to the front side of the side frame 4, the front main caster 7 provided on the side frame 4 is more than the rear main caster 8 provided on the back frame 5, as shown in FIG. As shown in FIG. 2, the auxiliary caster 10 appears in a state of protruding forward.

Therefore, as shown in FIG. 3 which is a side view of the folded cart 1, the front main caster 7 projects rearward from the rear main caster 8 provided on the back frame 5, and the auxiliary caster 10 projects forward. To do.
As shown in the right diagram in FIG. 3, the auxiliary caster 10 is connected to the floor surface 12 in the state where the front and rear main casters (the front main caster 7 and the rear main caster 8) are in contact with the floor surface 12. A slight gap is provided between them.

  And according to Fig.4 (a) which shows the state at the time of the storage of the same trolley | bogie 1, the trolley | bogie 1 inclines to the auxiliary | assistant caster 10 side which is the front centering on the rear side main caster 8, and assists. The caster 10 supports itself in a forward tilted posture, and the cart 1 is in a stable state so that the center of gravity moves toward the auxiliary caster 10 and does not easily fall backward.

  The inclination angle is determined by the protruding length of the auxiliary caster 10 and the height at which the auxiliary caster 10 is provided slightly above the main caster when the carriage 1 is in use. Is determined by the height of each frame member (side frame 3, side frame 4, back frame 5) and the length of the bottom plate 2 in the left-right direction.

  Then, the carriage 1 in a stable state so that the center of gravity moves to the side of the auxiliary caster 10 shown in FIG. 4A and does not easily fall backward is moved to the direction of the arrow shown in FIG. Even when the force is applied and the center of gravity of the carriage 1 moves rearward, and the auxiliary caster 10 of the carriage 1 floats up from the floor 12 as shown in FIG. 4B, the carriage 1 tilts backward. The front main caster 7 that protrudes rearward from the rear main caster 8 is stepped on to prevent the cart 1 from falling backward.

Further, a front main caster 7 (provided on the side frame 4 in the cart 1 of this embodiment) protruding rearward from the rear main caster 8 is a support stay having a step to which the front main caster 7 is attached. Since the upper surface (see FIG. 9B) of the lower stage in 2a is positioned below the lower surface of the carriage 1 of the carriage 1, when the folded carriages 1 are overlapped as shown in FIG. A lower part of the support stay 2a having a step to which the main casters 7 are attached together with the front main casters 7 (provided on the side frame 4 in the cart 1 of the present embodiment) of the front carts arranged side by side is overlapped. As shown in FIG. 6, when entering a large number of trolleys 1 in a stacked manner, the trolleys can be stacked without gaps.
Further, the upper portion of the support stay 2a serves as a bottom plate receiving portion for supporting the bottom plate 2 serving as a loading platform.

  Also in the auxiliary caster 10, the support arm 9 to which the auxiliary caster 10 is attached is tapered as shown in FIG. 7, and the shape of the support arm 9 is an inverted U-shaped member (not shown) or reverse L. As shown in FIG. 5, when the folded carts 1 are stacked and arranged, the support arms 9 of the rear carts that have been rearranged are stacked in front by using a character-like member (not shown). The telescope is telescoped in the support arm 9 of the carriage (see FIG. 8) so as not to interfere with the overlapping.

  When the protruding length of the auxiliary caster 10 is increased, as described above (see FIGS. 7 and 8), the support arm 9 is placed within the support arm 9 of the cart that is previously stacked. Although not shown in the drawings in the embodiments, the support arm 9 protrudes obliquely forward, for example, from the base thereof, and the support arms 9 of the rear carriages stacked one above the other overlap. In some cases, the support arms 9 of the carts arranged side by side are avoided.

  The main casters (the front main caster 7 and the rear main caster 8) are attached to the respective frame members by direct attachment of the main casters directly to the respective frame members or indirectly by interposing some members. The fixing by the mounting may be performed by using a fixing tool such as a screw or by welding.

  The main casters (front main caster 7, rear main caster 8) are partly (usually the front main caster 7) with a brake, and all wheels can freely change the direction of travel. In some cases, the caster may be a car caster, or a desired car front / rear / right / left may be a free car caster and the other may be a fixed car caster.

  9 shows the left and right side frame (side frame 3 and side frame 4) members and the back frame 5 member of the cart shown in FIGS. 1 and 2 as panel (side panel 3a, side panel 4a and back panel 5a) members. It is the operation | movement figure which is the other Example comprised by and showed folding operation | movement of a trolley | bogie.

  In each panel member for preventing load collapse provided above the bottom plate 2 of the cart 1 shown in FIG. 9, the side panel 3a and the side panel 4a are connected to both sides of the back panel 5a by a connecting tool 6a so as to be freely bent. The back panel 5a side of the connector 6 is fixed to the back panel 5a, and the side panel 3a and the side panel 4a side are connected to the hinge 6b of the connector 6a. The panel 3a and the side panel 4a can freely rotate.

  Further, front and rear main casters serving as moving wheels of the carriage 1 are provided on the front, rear, left and right sides of the carriage 1, respectively. One of the front main casters 7 in the main caster is at the front end of the side panel 3a, and the other is the side panel 4a. The rear main caster 8 is fixed to the left and right sides of the back panel 5a member.

  The folding operation of the carriage 1 shown in FIG. 9 is common to the folding action of the carriage shown in FIGS. 1 and 2. The folding operation of the carriage 1 in FIG. 9 will be described with reference to FIG.

  FIG. 9A shows the cart 1 in use. From this state, the bottom plate 2 serving as a loading platform is first erected on the back panel 5a side, and a fixture (shown in the figure) is provided with the bottom plate 2 on the back panel 5a. It is fixed by (omitted) (see FIG. 9B).

  Next, the side panel 4a is folded to the front side of the bottom plate 2 standing on the front side of the back panel 5a (see FIG. 9C), and finally the side panel 3a is folded to the front side of the side panel 4a (see FIG. 9D). Thus, the cart 1 can be folded.

  Then, as shown in FIG. 9C, the front main caster 7 fixed to the front end of the side panel 4a by folding the side panel 4a to the front side of the bottom plate 2 standing on the front side of the back panel 5a is shown in FIG. In the same manner as the illustrated cart, the rear main caster 8 is fixed to the left and right sides of the back panel 5a so as to protrude rearward.

  Further, as shown in FIG. 3 (d), the auxiliary caster 10 hidden under the side panel 3a by folding the side panel 3a to the front side of the side panel 4a is moved forward as in the cart shown in FIG. Appears in a protruding state.

  Reference numeral 11 in the drawing in the first embodiment is a support column of the auxiliary caster 10 connected to the support arm 9, and reference numeral 2b in the drawing in the second embodiment is a bottom plate support for supporting the bottom plate 2 serving as a loading platform. is there.

  In addition, compared to the conventional casters in which each caster is parallel when folded, the cart of this embodiment is such that at least one main caster in the front main caster is behind the rear main caster. Since it is configured so as to protrude, even when one side frame is folded to the back frame side and the other side frame is folded, the two rear main casters 8 and the main caster on the side frame side folded first Since 7 can be stepped on and the cart 1 can be prevented from falling backward, the cart 1 can be folded in peace.

DESCRIPTION OF SYMBOLS 1 Carriage 2 Bottom plate 2a Support stay 2b Bottom plate holder 3 Side frame 3a Side panel 4 Side frame 4a Side panel 5 Back frame 5a Back panel 6 Connection tool 6a Connection tool 6b Hinge 7 Front main caster 8 Rear main caster 9 Support arm 10 Auxiliary caster 11 Prop 12 Floor

Claims (5)

  A loading platform for loading the cargo, a main caster for moving the cart arranged before and after the cart, and an auxiliary caster for storing the cart are provided, and the loading platform can be folded toward the main caster on the rear side, and the main caster on the front side Can move in the direction of the main caster on the rear side, the loading platform is folded in the direction of the main caster on the rear side, and the main caster on the front side is moved in the direction of the main caster on the rear side. The cart is configured such that the caster protrudes forward from the front main caster, the cargo bed is folded toward the rear main caster, and the front main caster is moved toward the rear main caster. In this case, at least one of the main casters on the front side is configured to protrude rearward from the main caster on the rear side, and the loading platform is folded. Or is in the truck the carriage in a state in which the carriage is self-supporting is made so as to be able to maintain the independence by at least one of the front main caster projects when tilted backwards, the rear than the rear of the main caster.   The loading platform includes a bottom plate member, left and right side frame members, and a back frame member. The bottom plate member can be folded inside the back frame member, and each of the left and right side frame members can be folded inside the back frame member. The trolley | bogie of Claim 1 comprised as follows.   The cart according to claim 2, wherein the cart is configured such that the main caster on the front side moves in synchronization with the folding operation of each of the left and right side frame members.   The cart according to claim 3, wherein the left and right side frame members are configured to be folded so as to be positioned in front of a bottom plate member folded inside the back frame member when the left and right side frame members are folded inside the back frame member.   When the carts are folded and self-supported carts are stacked and arranged, the folded main carrier of the rear cart in which the front main casters that protrude rearward from the rear main casters are arranged The trolley | bogie of Claim 2 comprised so that it might enter below.

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