JP2007269188A - Wheeled cart - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wheeled cart which can be laid side by side orderly when folded into storage and requires no wasted space, and is made self-standing stable and safe manner. <P>SOLUTION: The wheeled cart 1 comprises a loading platform, main casters 8 disposed on the front and rear side of the wheeled cart 1 for use in movement and auxiliary casters 10 for use in storage. The main casters 8 on the front side can move in the direction of the main casters 8 on the rear side. Also, the loading platform can be folded up in the direction of the main casters 8 on the rear side. By this folded configuration of the main casters 8 on the front side and the loading platform, the auxiliary casters 10 can project ahead of main casters 8 on the front side. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a carriage used for transporting articles.

  Some carts used for transporting articles are configured so that they can be folded even when kept in a self-supporting state so as not to take up space as much as possible during storage and vehicle transport (for example, Patent Document 1 and Patents). Reference 2).

JP 2003-2326 A (pages 1-6, FIG. 3) JP 2004-123028 A (pages 1-7, pages 9-10, FIGS. 1-2, 10-11)

  This folded shape (see Patent Document 1) is L-shaped in plan view, but when the carts folded in L-shape are stacked on the front of the cart, how to overlap them Will overlap while shifting in an oblique direction. That is, the superimposed shape is a parallelogram in plan view. Therefore, when the cart (container) is stored in a room or transported by a vehicle, the four corners of the room and the four corners of the vehicle are normally formed at right angles, but the first one is the corner portion. Although it touches the wall, it does not follow the wall of the room or the vehicle loading platform after the second vehicle, and as the number of stacks increases, the space increases from the wall and the useless space increases.

  Further, the folded shape of this (see Patent Document 2) is a trapezoidal frame (bottom frame main body) in which only the loading platform (main body for storing articles) is folded in an I shape in plan view and front and rear wheels are attached. ) Is left unfolded. When a plurality of pieces are stacked in this folded state, the overlapping method overlaps without shifting in an oblique direction, but only the trapezoidal frame (bottom frame body) to which the front and rear wheels are attached is close to the floor surface. Since the bulge (goods transporter) is stored in a room or transported by a vehicle, the space occupied by the frame (bottom frame body) is wasted, and the trolley (goods) Even when passing away from the carrier, there was a risk of falling over by catching the foot on the frame (bottom frame body).

  The present invention can provide a cart that can be used safely without being wasted and can be kept safe.

  The carriage according to the present invention is provided with a carriage on which the carriage is loaded, a main caster for moving the carriage arranged before and after the carriage, and an auxiliary caster for storing the carriage, and the front main caster is the rear main caster. It can move in the direction of the casters, and the carrier of the carriage can be folded in the direction of the main casters on the rear side, the main casters on the front side are moved in the direction of the main casters on the rear side, The auxiliary caster is configured to project forward from the front main caster by being folded in the main caster direction.

  Further, the auxiliary caster is configured such that a slight gap is opened between the auxiliary caster and the floor surface when the front and rear main casters are in contact with the floor surface.

  Further, the movement of the front main caster and the folding operation of the loading platform are synchronized.

  In addition, the auxiliary caster is provided below the tip of the tapered cross-section inverted U-shaped member or the cross-section inverted L-shaped member protruding forward of the carriage.

  The protruding length of the auxiliary caster forward is configured to be longer than the depth of the folded cargo bed.

  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 one side frame member of the left and right side frame members, and each of the left and right side frame members. Is also configured to be folded inside the back frame member.

  The front main casters are configured to move in synchronization with the respective folding operations of the left and right side frame members.

  When the left and right side frame members are folded inside the back frame member, the side frame member on which the bottom plate member is folded is folded so as to be positioned in front of the previously folded side frame member. .

  According to the carriage of the present invention, the carriage moves the main caster on the front side of the carriage to the vicinity of the rear main caster, and the auxiliary caster is moved by folding the cargo bed in the direction of the rear main caster. Since the front main caster protrudes forward, the front and rear main casters approach by folding the cart, and the auxiliary caster supports the cart that is self-supporting with the center of gravity biased forward by folding the loading platform from the front side of the cart It is possible to prevent the cart from falling.

  Therefore, in order to make the cart that is folded as in the past safe and self-supporting, the cart (container) can be folded into an L shape, and the frame (bottom frame main body) to which casters (wheels) are attached Even if it is not left unfolded, according to the present invention, the folded cart can be made to stand by itself safely and without taking up unnecessary space.

  And since the protruding amount of the auxiliary caster is almost the same as the folding thickness of the carriage, the entire frame body (bottom frame body) to which the casters (wheels) are attached does not protrude greatly as in the prior art. There is also very little risk of getting caught and falling when passing.

  In addition, a cart that is configured such that a slight gap is opened between the auxiliary caster and the floor surface while the front and rear main casters are in contact with the floor surface. Using the main caster on the front side of the trolley as a fulcrum, tilt the dolly forward until the auxiliary caster touches the floor.

  With this self-supporting form, the main caster on the rear side of the cart floats from the floor, but the center of gravity of the cart that is folded by lifting the main caster on the rear side from the floor moves further forward. Since the supporting weight is increased and the contact stability between the auxiliary caster and the floor surface is improved, the cart can be stably and independently supported by the auxiliary caster and the front main caster. In addition, since the cart is tilted forward, it is possible to greatly prevent the cart from falling backward.

  And when multiple trolleys are stacked, the trolleys can be stacked without any gaps, and when they are stacked, the way they overlap can be stacked straight forward. There is no wasted space.

Hereinafter, the cart of the present invention is explained based on an accompanying drawing.
FIG. 1 is a perspective view showing an example of a cart according to the present invention and a folded state of the cart.
The cart 1 keeps the bottom plate 2 member, the left and right side frames (side frame 3, side frame 4) member, the back frame 5 member, the main caster 8 serving as a moving wheel, and the folded cart 1 safely. And an auxiliary caster 10 for the purpose.

According to FIG. 1, in the folded state of the carriage 1, the bottom plate serving as a loading platform is folded and positioned in a state of standing on the inner side of the left side frame 3 toward the front, and the right side frame 4 faces the back. The side frame 3 in which the bottom plate 2 is folded is positioned in a folded state on the front side of the side frame 4.
And when it will be in this state, the auxiliary caster 10 will appear in the state which protruded ahead.

  Further, in each frame member (side frame 3, side frame 4, back frame 5) for preventing load collapse provided above the bottom plate 2 of the carriage 1, the side frame 3 and the side frame 4 are respectively provided on both sides of the back frame 5. Are connected by a connecting tool 6 so as to be bent. The back frame 5 side of the connector 6 is fixed to the back frame 5, and the side frame 3 and the side frame 4 side are free from the side frame 3 and the side frame 4, so that the side frame 3 And the side frame 4 can rotate freely.

  The main casters 8 are respectively provided on the front, rear, left and right of the carriage 1, the rear main casters 8 are fixed to the left and right sides of the back frame 5 member, one of the front main casters 8 is at the front end of the side frame 3 member, and the other is It is fixed to the front end of the side frame 4 member.

  The attachment of the main caster 8 to each member may be a direct attachment in which the main caster 8 is directly attached to each member, or an indirect attachment in which some member is interposed. In some cases, the fixing tool is used, or in some cases, it is fixed by welding.

  Furthermore, the main caster 8 adopts a part with a brake (usually the front main caster), and a free wheel caster in which the traveling direction of all wheels can be freely changed. Casters may be used and others may be fixed vehicle casters.

  And the auxiliary caster 10 will be in the state which protruded ahead rather than the side frame 3 member toward the front of the back frame 5. FIG. The protruding amount is determined by the height of the frame material (side frame 3, side frame 4, back frame 5) and the length of the bottom plate 2 in the left-right direction.

  That is, when the cart 1 folded as shown in FIG. 5 is viewed from the side, the rear main caster 8 of the cart 1 is inclined toward the auxiliary caster 10 which is the front, and a load is applied to the auxiliary caster 10 side. The tilting angle is determined by the protruding length of the auxiliary caster 10 and the height at which the auxiliary caster is provided slightly above the main caster when the carriage is in use. Is done.

In the state in which the carriage is folded, the auxiliary caster 10 protrudes forward. As shown in FIG. 6, the shape of the support arm 9 of the auxiliary caster 10 is reversed to a tapered cross section as shown in FIG. As shown in FIG. 7, when the carts 1 are overlapped as shown in FIGS. 11 and 12 by using a U-shaped member or an inverted L-shaped member having a tapered cross section as shown in FIG. 6B. The support arms 9 of the rear carts arranged in a nested manner are nested in the support arms 9 of the carts arranged in front of each other so that they do not interfere with the arrangement.
The arm 9 and the column 11 are integrally formed.

  FIG. 8 shows the carriage 1 in which the support arm 9 of the auxiliary caster 10 is formed of a tapered cross-section inverted U-shaped member.

  The rear main caster 8 on the support arm 9 side of the carriage 1 is attached at a position on the inner side of the support arm 9, and the opposite rear main caster 8 is also positioned substantially symmetrical with respect to that position. It is attached to.

  2 shows another embodiment of the carriage 1 shown in FIG. 1. The carriage 1 of this embodiment includes the left and right side frames (side frames 3 and 4) of the carriage 1 shown in FIG. It is the Example which comprised the frame 5 member with the panel member (the side panel 3a, the side panel 4a, the back panel 5a) member.

  2, the folding operation of the carriage 1 is the same as that of the carriage 1 shown in FIG. 1. The right side panel 4a is located on the front side of the back panel 5a as viewed from the front, and the bottom plate 2 serving as a loading platform is located in front. The side panel 3a is folded and positioned on the front side of the side panel 4a. In this state, the auxiliary caster 10 appears in a state of protruding forward.

  Moreover, in each panel member (side panel 3a, side panel 4a, back panel 5a) for preventing load collapse provided above the bottom plate 2 of the carriage 1, the side panel 3a and the side panel 4a are respectively provided on both sides of the back panel 5a. Are connected by a connector 6a so that they can be bent, the back panel 5a side of the connector 6a is fixed to the back panel 5a, and the side panel 3a and the side panel 4a side are via a hinge 6b of the connector 6a. Therefore, the side panel 3a and the side panel 4a can be freely rotated by the hinge 6b.

  The main casters 8 are respectively provided on the front, rear, left and right of the carriage 1, the rear main casters 8 are fixed to the left and right sides of the back panel 5a member, one of the front main casters 8 is at the front end of the side panel 3a member, and the other is It is fixed to the front end of the side panel 4a member.

FIG. 3 is an operation diagram showing the folding operation by the cart of FIG. 2, and this folding operation is common to the cart of FIG. FIG. 3 (a) shows the cart 1 in use. From this state, first, as shown in FIG. 4, a bottom plate 2 serving as a loading platform is raised on the side panel 3a side, and the bottom plate 2 is provided on the side panel 3a. It fixes with the fixing arm 7a of the fixing tool 7 as shown in FIG.3 (b).
Next, the side panel 4a is folded to the front side of the back panel 5a as shown in FIG. 3C, and finally the side panel 3a is folded to the front side of the side panel 4a as shown in FIG. By entering this folded state, the auxiliary caster 10 appears in a state of protruding forward.

  FIG. 9 is a side view of the folded cart, and shows a state in which the frame members such as the back frame 5 are vertically erect. In this erect state, the main part is shown in FIG. As shown in an enlarged manner, the lower end of the auxiliary caster is positioned above the lower end of the main caster so that a slight gap is generated between the lower end of the auxiliary caster 10 and the floor surface 12.

When the carriage 1 is stored, that is, in practice, the center of gravity of the frame member such as the back frame 5 is displaced to the front side, that is, the auxiliary caster side with respect to the main caster 8, as shown in FIG. In addition, the carriage 1 is inclined forward toward the auxiliary caster 10 side.
In particular, since the bottom plate 2 is folded to the side frame 3 which is the frontmost side in the folded state, the center of gravity of the entire frame member in the folded state is displaced further forward, and thus the folded carriage is an auxiliary caster. It will be supported in a stable manner, and the possibility of falling backwards is unlikely. Needless to say, if the auxiliary caster 10 is not provided, the folded cart easily falls forward, and if it is established as shown in FIG. It can be estimated very easily that it becomes easy to fall down. If this is assumed, it can be easily understood that the stability is high when it is supported by the auxiliary caster in a state of being inclined forward as in the present invention.

FIG. 11 is a side view showing the trolleys that are overlaid, and FIG. 12 is a plan view showing the trolleys that are overlaid.
As shown in FIGS. 11 and 12, the carts 1 that are overlaid can be overlaid without gaps, and when they are overlaid, the way of overlapping can be straightly overlaid forward.
Specifically, the number of carts that can be accommodated in the same storage space can be increased by about 50% compared to the case of folding in an L shape in plan view described in the prior art, and the truck bed If the rectangular space is as described above, it can be loaded in a stable state without any gaps, and the loading amount is remarkably large as described above.

The perspective view which shows the Example of the trolley | bogie which concerns on this invention. The perspective view which shows the Example of a trolley | bogie. The operation | movement figure which shows the folding operation | movement of a trolley | bogie. The operation | movement figure which shows folding operation | movement of a baseplate. The side view of the folded trolley | bogie. Sectional drawing of the support arm which shows the Example of an auxiliary | assistant caster. The side view of the auxiliary caster part which shows the Example of an auxiliary caster. The perspective view which shows the Example of a trolley | bogie. 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 cart arranged side by side. The top view which shows the cart arranged side by side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Carriage 2 Bottom plate 2a Hinge 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 Bottom plate fixing tool 7a Fixed arm 8 Main caster 9 Support arm 10 Auxiliary caster 11 Prop 12 Floor

Claims (8)

  A loading platform for loading the cargo, a main caster for moving the cart disposed before and after the cart, and an auxiliary caster for storing the cart are provided, the front main caster can move in the direction of the rear main caster, and The carrier platform can also be folded in the direction of the main caster on the rear side, the main caster on the front side is moved in the direction of the main caster on the rear side, and the load carrier is folded in the direction of the main caster on the rear side, A cart configured such that the auxiliary caster protrudes forward from the front main caster.   The cart according to claim 1, wherein the auxiliary caster is configured such that a slight gap is opened between the auxiliary caster and the floor surface when the front and rear main casters are in contact with the floor surface.   The cart according to claim 1, wherein the carriage is configured such that movement of the front main caster and folding operation of the loading platform are synchronized.   The cart according to claim 1, wherein the auxiliary caster is provided below a tip of a tapered reverse U-shaped member or a reverse L-shaped member projecting forward of the cart.   The trolley | bogie of Claim 1 comprised so that the protrusion length to the front of the said auxiliary caster may be more than the depth length of the folded carrier.   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 one side frame member of the left and right side frame members, and each of the left and right side frame members. The trolley according to claim 1, wherein the carriage is configured to be folded inside the back frame member.   The cart according to claim 6, wherein the main caster on the front side moves in synchronization with the folding operation of each of the left and right side frame members.   When the left and right side frame members are folded inside the back frame member, the side frame member on which the bottom plate member is folded is folded so as to be positioned in front of the side frame member folded first. Item 7. The cart according to item 6.

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