JP2023007258A - Foldable dolly - Google Patents

Abstract

To provide a foldable dolly that can improve usability while allowing items to be easily taken into and from plural-stage item placing plates and can enhance effect of rotation restriction on the plural-stage item placing plates in a valley folding direction and load bearing strength.SOLUTION: A foldable dolly 1 includes a pair of left and right item placing plates 2 in upper and lower stages to which opposed free end sides are attached pivotally in an up-down direction, and base end sides of the left and right item placing plates 2, 2 are pivotally attached to a pair of front and back legs 3 with wheels at lower ends. Thus, the foldable dolly is foldable in a mounting fold. Restriction means 16, 18 that restrict the pair of left and right item placing plates from rotating in a valley folding direction are disposed at the respective stages. The free ends of the pair of left and right item placing plates 2 are respectively pivotally attached to connection rods 6 extendable in the up-down direction at either one side in the front-back direction.SELECTED DRAWING: Figure 1

Description

There is an application for exception to loss of novelty

TECHNICAL FIELD The present invention relates to a folding cart on which articles can be placed and transported, and which can be folded and stored when not in use.

For example, in stores such as supermarkets and convenience stores, trolleys are used when goods stored in the backyard are transported into the store and put out. If a large backyard cannot be secured, such as in a small urban store, the storage space for the trolley is wasted, and problems such as not being able to increase the amount of inventory may occur.

In order to solve such a problem, for example, if a folding cart (rack container) as described in Patent Document 1 is used, the cart can be folded and stored when not in use. The storage space can be saved.

Microfilm of Japanese Utility Model Application No. 49-156509 (Japanese Utility Model Laid-Open No. 51-82267) (Figs. 1 and 5)

However, in the folding carriage described in Patent Document 1, the free ends of the upper and lower multiple stages of base plates (article placement plates) that face each other in the left and right direction are connected to each other by a pair of central connecting rods that face in the front and rear direction. are connected so as to be rotatable in the vertical direction. As a result, there is a problem of poor usability, such as obstruction of loading and unloading of articles to and from the lower base plate in the front-rear direction and restrictions on the size of the loaded and unloaded articles.

In addition, when the folding cart is deployed and used, the central section can be connected by bringing the lower surface of the bottom plate into contact with the stoppers that protrude inward from the left and right on the lower ends of the pedestals at the four corners. The base plate of each stage connected to the rod is restricted from rotating in the direction of the valley fold. Therefore, although the rotation of the bottom plate in the valley fold direction is effectively restricted, the effect of restricting the rotation of the upper bed plate in the valley fold direction is small, and the load bearing strength is also low. There is

The present invention has been devised by paying attention to such problems, and is intended to improve usability by facilitating the loading and unloading of articles to and from an article mounting plate, and to rotate a plurality of stages of article mounting plates in the valley folding direction. To provide a foldable trolley capable of enhancing the motion control effect and load-bearing strength.

In order to solve the above problems, the folding trolley of the present invention includes:
A pair of left and right article placement plates having opposing free ends pivoted so as to be rotatable in the vertical direction are provided in a plurality of stages, and a pair of front and rear article placement plates having wheels at the lower ends of the base ends of the left and right article placement plates. A folding trolley that can be folded into a mountain fold by being pivotally attached to a pedestal,
Each stage is provided with a restricting means for restricting the rotation of the pair of left and right article placement plates in the valley folding direction,
The free ends of the pair of left and right article placement plates are rotatably attached to connecting rods extending vertically in either one of the front and rear directions.
According to this feature, the connecting rod to which the free ends of the pair of left and right article placement plates are pivotally attached is provided only in one of the front and rear directions, so that the other connecting rod is not provided. The face of is wide open. As a result, it becomes easier to put in and take out articles from the other side of the article mounting plate on the lower stage side, and even large articles can be easily put in and taken out, thereby improving usability. In addition, it is possible to regulate the rotation of the plural stages of the article mounting plates in the valley folding direction by the restricting means of each stage. Furthermore, by simply moving the connecting rod in the vertical direction, it is possible to fold and unfold the upper and lower article placement plates in a plurality of stages at once.

The restricting means is a contact block which is provided on the base end side of the pair of left and right article placement plates and contacts the inner side surfaces of the front and rear pedestals which are opposed to the left and right.
According to this feature, the abutment block can effectively restrict the rotation of the multi-stage article mounting plate in the valley folding direction. In addition, since the four abutment blocks on the front, rear, left, and right abut on the four pedestals for every plurality of stages, the folding truck is prevented from wobbling in the lateral direction, and the strength of the folding truck when unfolded increases.

The restricting means is a pair of left and right abutting blocks which are provided at the pivotal portions of the free ends of the pair of left and right article placement plates and whose facing surfaces are in contact with each other.
According to this feature, the pair of left and right abutment blocks abut against each other, thereby effectively restricting the rotation of the plural stages of article placement plates in the valley folding direction. In addition, since the rotation in the valley-folding direction is restricted at the pivots of the free ends of the pair of left and right article placement plates, the load bearing strength of the article placement plates increases.

The free ends of the left and right article placement plates are pivotally connected to each other by a pair of right and left downward L-shaped hinge members so as to be separated from each other when unfolded.
According to this feature, since the free ends of the left and right article mounting plates are spaced apart from each other, there is no danger of catching a finger or the like.

It is characterized by having a slider that can move up and down along the connecting rod, and a pair of left and right arm members whose both ends are pivotally attached to the left and right hinge members and the slider.
According to this feature, the connecting rod is guided by the slider, and both ends of the pair of left and right arm members are pivotally attached to the left and right hinge members and the slider, so that the connecting rod can be kept vertical and smooth. can be moved up and down. Moreover, even if there is only one connecting rod on one side, the folding and unfolding operations can be easily performed.

An operating handle is provided at the upper end of the connecting rod.
According to this feature, the connecting rod can be easily moved up and down by gripping the operating handle, and the folding and unfolding operations can be performed safely.

1 is a front perspective view of a folding trolley according to an embodiment of the present invention; FIG. It is the perspective view which looked at the folding trolley from the back. FIG. 11 is an enlarged perspective view of a restricting means mounting portion of the upper article placing plate; FIG. 11 is an enlarged perspective view of a restricting means attaching portion of the lower article placing plate; It is a figure explaining the operation|movement at the time of deployment of a pedestal and a contact block. FIG. 4 is an exploded perspective view of a pivotal connection between upper and lower article placement plates and connecting rods; FIG. 4 is an exploded perspective view of a pivotal attachment portion on the rear surface side of the upper article placing plate; It is a figure explaining operation|movement at the time of expansion|deployment of a hinge member and an abutment block. It is a perspective view when folding a folding trolley.

A form for carrying out the folding truck of the present invention will be described with reference to FIGS. 1 to 9. FIG. The front, rear, left, and right directions of the folding cart are the directions of the arrows shown in FIG.

As shown in FIGS. 1 and 2, the folding trolley 1 according to the embodiment has a vertical trolley whose base end side is rotatably pivoted so that the opposite end side, which is a free end, can move relatively in the vertical direction. A pair of two-tiered left and right article placement plates 2, 2, and a pair of front and rear metal pedestals 3 to which the left and right end sides, which are the base end sides of the left and right article placement plates 2, 2, are pivotally attached, 3, 3, 3. A caster 4 which is a wheel is attached to the lower end of each pedestal 3 .

A reinforcing member 5 of a truss structure made of metal wire is fixed downward to the lower surface of the peripheral edge portion of the front, rear, left, and right sides of the left and right article placement plates 2, 2, and the article placement plate 2 made of thin sheet metal is reinforced. there is As a method for fixing the reinforcing member 5, for example, horizontal metal pieces having screw holes are fixed to the four corners of the reinforcing member 5 facing inward, and bolts inserted from above the four corners of the article placing plate 2 are attached to the metal pieces. The article mounting plate 2 and the reinforcing member 5 may be fixed by screwing into the screw holes of the piece, or directly fixed by welding at a plurality of points of the article mounting plate 2 and the reinforcing member 5 . Furthermore, the article mounting plate 2 may be made of a resin molding other than metal.

The free ends of the left and right article placement plates 2, 2 in the upper and lower two stages are pivotally connected to a connecting rod 6 made of a metal rectangular tube extending vertically on the front side in the following manner. As shown in FIGS. 1 and 5, the reinforcing members 5, 5 on the front side of the left and right article placement plates 2, 2 in the upper and lower two stages are provided with a pair of left and right hinge members made of a metal plate and having a downward L-shape when viewed from the front. Horizontal pieces 7a, 7a of 7, 7 are fixed by welding so that downward pieces 7b, 7b overlap each other in the front-rear direction. In this fixed state, the hinge members 7, 7 are located on the front side of the article placement plates 2, 2 and the reinforcing members 5, 5 relative to the reinforcing members 5, 5 when viewed from above. The support blocks 18, 18 enter the gaps of the reinforcing members 5, 5 and are positioned below the article mounting plates 2, 2. As shown in FIG. The horizontal pieces 7a, 7a of the hinge members 7, 7 are welded to the reinforcing members 5, 5 at positions where the opposite ends of the upper article placing plates 2, 2 are slightly spaced apart from each other when the article mounting plates 2, 2 are deployed. Fingers are prevented from being pinched between the free ends of the article mounting plates 2,2.

Bolts are inserted into shaft holes 8 formed in the upper and lower ends of the connecting rod 6 and extending in the front-rear direction, and through shaft holes 8 formed in the downward pieces 7b, 7b of the left and right hinge members 7, 7 and penetrating in the front-rear direction. A pivot shaft 9 is inserted from the front, and a nut 10 is screwed onto the pivot shaft 9 on the rear surface side of the downward piece 7b. is rotatably pivoted. As a result, when the connecting rod 6 is moved vertically, the left and right article mounting plates 2, 2 in the upper and lower two stages are interlocked and rotated vertically about the pivot shafts 9 of the hinge members 7, 7. become.

Between the hinge members 7, 7 on the upper side and the connecting rod 6 in the front-rear direction, a handle mounting member 12 to which an upward U-shaped operating handle 11 is mounted is inserted, and is formed below the handle mounting member 12. A pivot shaft 9 is inserted into the shaft hole 8 formed in the hole 8 and attached to the rear surface side of the connecting rod 6 . A rearward facing horizontal piece 12a is connected to the upper end of the handle mounting member 12. By bringing the lower surface of this horizontal piece 12a close to or in contact with the upper ends of the left and right hinge members 7, 7, the connection rod 6 is centered. As a result, the handle mounting member 12 is prevented from rotating in the left-right direction.

A rectangular cylindrical slider 13 is fitted to the connecting rod 6 so as to be movable in the vertical direction. The free ends of the projecting pieces 13a, 13a and the horizontal pieces 7a, 7a of the left and right hinge members 7, 7 are connected by a pair of left and right arm members 14, 14. As shown in FIG. That is, a bolt-shaped pivot shaft 9 is inserted from the front into axial holes 8 respectively formed in the projecting pieces 13a, 13a, the horizontal pieces 7a, 7a, and the upper and lower ends of the arm members 14, 14, and the horizontal pieces 7a, By screwing a nut 10 onto each pivot shaft 9 on the rear surface side of 7a and the rear surface side of the lower end portions of the arm members 14, 14, both ends of the arm members 14, 14 are connected to the slider 13 and the left and right hinge members 7. , 7 so as to form an inverted V shape when viewed from the front. When the connecting rod 6 is vertically moved, the slider 13 relatively moves in a direction opposite to the moving direction of the connecting rod 6, and the left and right arm members 14, 14 relatively rotate in the horizontal direction.

As shown in FIG. 7, the free ends on the rear side of the upper left and right article placement plates 2, 2 are connected by hinge members 7, 7, which are fixed to the left and right reinforcing members 5, 5 and are similar to those on the front side. pivoted. A handle attachment member 12 having an operating handle 11 is attached to the rear side of the downward pieces 7b, 7b of the hinge members 7, 7 by a pivot shaft 9 and a nut 10, like the front side. The lower surface of the horizontal piece 12a facing forward of the handle mounting member 12 comes close to or abuts on the upper ends of the left and right hinge members 7, so that the handle mounting member 12 rotates in the left and right direction about the pivot shaft 9. is prevented. Although illustration is omitted, the free ends on the rear side of the left and right article placement plates 2, 2 in the lower stage are pivotally connected only by a pair of left and right hinge members 7, 7. As shown in FIG. As a result, when the front and rear operation handles 11, 11 are grasped and the connecting rod 6 is moved in the vertical direction, the left and right article placement plates 2, 2 of the upper stage and the lower stage move the pivot shafts 9 of the hinge members 7, 7. It rotates about the center in the vertical direction at substantially the same timing.

As shown in FIGS. 3 and 4, the base ends of the left and right article placement plates 2 of the upper and lower stages (because they have the same structure, the right article placement plate and the rear side base end are not shown). ), a metal spacer member 15 is fixed to the reinforcing member 5, a bolt-shaped pivot shaft 9 inserted from the outer surface side of the pedestal 3 is inserted through the spacer member 15, and the pivot shaft 9 The base ends of the upper and lower article placement plates 2 are pivotally attached to the pedestal 3 by screwing nuts (not shown) to the upper and lower article placement plates 2 . In this manner, the article mounting plate 2 is attached so as to be rotatable around the base end portion.

On the front and rear outer surfaces of the base end portions of the upper and lower reinforcing members 5, rectangular parallelepiped metal abutment blocks 16, which are restricting means for restricting the rotation of the left and right article placement plates 2 in the valley folding direction, are welded. It is stuck. When the folding carriage 1 is deployed to the use state, as shown in FIG. Since the right end surface of the block 16 contacts the left end surface of the pedestal 3, the left and right article mounting plates 2 are restricted from turning in the valley-folding direction, and are maintained in a horizontal state. In addition, in FIG. 5, the cover plate 17 is indicated by a chain double-dashed line for convenience of explanation.

A cover plate 17 is attached by a pivot shaft 9 to cover the contact portion between the contact block 16 and the pedestal 3 from the outside on the front and rear outer surfaces of the pedestal 3 at the pivoted portion of the upper and lower article placement plates 2 . It is designed to prevent a finger or the like from being caught during deployment. In addition, in order to prevent the cover plate 17 from rotating in the vertical direction about the pivot shaft 9, the contact piece 17a of the upper cover plate 17, which contacts the upper surface of the pedestal 3, In the cover plate 17, contact pieces 17b that contact the outer surface of the pedestal 3 in the left-right direction are continuously provided.

As shown in FIGS. 6 to 8, free end portions of the upper and lower left and right article placement plates 2, 2 are also provided with restricting means for restricting the rotation of the article placement plates 2, 2 in the valley folding direction. Abutting blocks 18, 18 made of metal are provided. The abutting blocks 18, 18 are fixed by welding to the front and rear inner surfaces of the hinge members 7, 7. As shown in FIG. Further, as described above, the hinge members 7, 7 are fixed to the opposed portions of the left and right reinforcing members 5, 5 by welding. As a result, when the folding carriage 1 is unfolded for use, the opposing surfaces of the left and right abutment blocks 18, 18 come into contact with each other as shown in FIG. The rotation of the plate 2 in the valley-folding direction is restricted so that the plate 2 is held in a horizontal state.

When folding the folding cart 1 having such a configuration, the front and rear operation handles 11, 11 are grasped and pulled up. That is, when the operation handles 11, 11 are grasped and pulled up, the connecting rod 6 moves upward, and the left and right articles on the upper and lower stages, which are pivotally attached to the connecting rod 6 via the hinge members 7, 7, are placed. The plates 2, 2 are folded at once in a mountain fold as shown in FIG. At the same time, the left and right pedestals 3, 3 move toward each other so that the folding carriage 1 can be folded compactly. In order to deploy the folding cart 1 to the use state, the operating handles 11, 11 are gripped and the connecting rod 6 is moved downward. When unfolded, the front, rear, left, and right four abutment blocks 16 abut on the four pedestals 3, respectively, and the left and right abutment blocks 18, 18 abut on each other, thereby forming the upper and lower article placement plates 2. The rotation in the valley-folding direction is reliably regulated and held in a horizontal state. For example, a pin hole may be provided in the intermediate portion of the connecting rod 6, and a stopper pin may be inserted into the pin hole directly above the slider 13 when the connecting rod 6 is moved to the upper limit. By doing so, the downward movement of the connecting rod 6 is prevented, so that the folded state can be reliably maintained.

As described above, in the folding cart 1 according to the embodiment, the connecting rod 6 to which the free ends of the left and right article mounting plates 2, 2 are pivotally connected is provided only in the front, as shown in FIG. Since the rear surface on which the connecting rod 6 is not provided is wide open, even a large article can be easily put in and taken out from the lower article placing plates 2, 2 from the rear side, and usability is improved. In addition, since the free ends of the left and right article placement plates 2, 2 in the longitudinal direction of the folding carriage 1 are pivotally connected to the connecting rod 6, the opening on the opposite side of the connecting rod 6 is ensured wide enough for folding. It is possible to reduce the width at that time. On the other hand, in the conventional folding cart described in Patent Document 1, since central connecting rods are positioned in the front and rear, the loading and unloading of articles is restricted. In addition, since the short side of the article mounting plate is divided and folded, the width of the carriage when folded becomes large.

In addition, the four contact blocks 16 on the front, rear, left, and right sides and the contact blocks 18 on the left and right sides cooperate to effectively restrict the rotation of the upper and lower article placement plates 2 in the valley fold direction. In addition, the left and right article placement plates 2 can be reliably held in a horizontal state, and the load bearing strength of the article placement plates 2 can be increased. Moreover, since the four contact blocks 16 on the front, rear, left, and right of the upper and lower stages abut on the four pedestals 3, the folding truck 1 is prevented from wobbling in the left-right direction, and the strength at the time of unfolding increases.

Further, the upper and lower article placement plates 2 can be folded or unfolded at once simply by moving the connecting rod 6 in the vertical direction. At this time, by gripping the front and rear operation handles 11, 11, the connecting rod 6 can be easily moved up and down, and the folding and unfolding operations can be performed safely. In addition, since the left and right hinge members 7, 7 are L-shaped downward, and the downward pieces 7b, 7b are connected to each other by the pivot shaft 9, the left and right article mounting plates can be moved around the pivot shaft 9. 2, 2 can be rotated in a large circle, so that the free ends of the left and right article mounting plates 2, 2 do not suddenly approach each other when unfolded, making it difficult to pinch a finger or the like.

Further, the connecting rod 6 is guided by the slider 13, and both ends of the pair of left and right arm members 14, 14 are pivotally connected to the left and right hinge members 7, 7 and the slider 13, so that the connecting rod 6 can be vertically moved. It can be moved up and down smoothly while maintaining its state. In addition, even if there is only one connecting rod 6 on the front and rear sides, the folding and unfolding operations can be easily performed.

Although the embodiments of the present invention have been described above with reference to the drawings, the specific configuration is not limited to these embodiments, and additions and modifications within the scope of the present invention may be made. Included in the present invention.

For example, in the above embodiment, the abutment block 16 and the abutment block 18 regulate the rotation of the article mounting plate 2 in the valley folding direction, but the abutment block 18 side is omitted. may In this case, instead of the abutment block 16, for example, the pedestal 3 and the reinforcing member 5 or the article placement plate 2 may abut against each other to restrict rotation. Further, instead of the abutment block 18, the left and right reinforcing members 5, 5 or the article mounting plates 2, 2 may be brought into contact with each other to restrict rotation.

Further, although the abutment block 16 and the abutment block 18 are both rectangular parallelepiped shapes, they may be of any shape.

Also, although the contact block 16 is fixed to the reinforcing member 5 in the example described above, it may be fixed to the article placement plate 2 . Furthermore, it may be fixed to the pedestal 3, in which case the contact block will contact the reinforcing member 5 or the article placing plate 2 when deployed.

Also, although the abutting block 18 has been described as being fixed to the hinge member 7 , it may be fixed to the reinforcing member 5 or the article placement plate 2 . In this case, it is sufficient that the hinge member 7 is fixed to the reinforcing member 55 or the article placing plate 2 .

Alternatively, the reinforcing member 5 may be omitted and only the article mounting plate 2 may be provided. Furthermore, since the reinforcing member 5 has a truss structure, it is lightweight and can be hung by a hook or the like, but it may be plate-shaped, in which case the reinforcing strength can be further increased.

Further, the hinge member 7 may have other shapes than the downward L-shaped one described as an example, and may not have a plate shape.

In the above embodiment, the slider 13 is fitted to the connecting rod 6, and the arm members 14, 14 are pivotally attached to the slider 13 and the hinge members 7, 7, but the slider 13 and the arm member 14 are omitted. sometimes.

Furthermore, although the operating handle 11 is mounted on the handle mounting member 12 in the above embodiment, the handle mounting member 12 may be omitted and directly mounted on the upper end portion of the connecting rod 6 . Also, the rear operating handle 11 may be omitted and only the front operating handle 11 may be used, or the front and rear operating handles 11 may be omitted, and the connecting rod 6 may be directly grasped and moved in the vertical direction.

In the above-described embodiment, the article mounting plate 2 is arranged in two tiers, but needless to say, it may be arranged in two or more tiers.

1 folding cart 2 article placement plate 3 pedestal 4 caster (wheel)
5 reinforcing member 6 connecting rod 7 hinge member 7a horizontal piece 7b downward piece 8 shaft hole 9 pivot shaft 10 nut 11 operating handle 12 handle mounting member 12a horizontal piece 13 slider 13a projecting piece 14 arm member 15 spacer member 16 contact block (Regulatory measures)
17 cover plates 17a, 17b abutting piece 18 abutting block (restricting means)

Claims (6)

A pair of left and right article placement plates having opposing free ends pivoted so as to be rotatable in the vertical direction are provided in a plurality of stages, and a pair of front and rear article placement plates having wheels at the lower ends of the base ends of the left and right article placement plates. A folding trolley that can be folded into a mountain fold by being pivotally attached to a pedestal,
Each stage is provided with a restricting means for restricting the rotation of the pair of left and right article placement plates in the valley folding direction,
A folding trolley, wherein the free ends of the pair of left and right article placement plates in the plurality of stages are rotatably attached to connecting rods extending vertically in one of the front and rear directions. 2. The apparatus according to claim 1, wherein the restricting means is an abutment block provided on the base end side of the pair of left and right article placement plates and abutting on the inner side surfaces of the front and rear pedestals that face each other in the left and right direction. Folding trolley as described. 3. The regulating means according to claim 1, wherein said restricting means is a pair of left and right abutment blocks which are provided at the pivotal portions of the free ends of said pair of left and right article placement plates and whose facing surfaces are in contact with each other. Folding trolley as described. 4. A pair of left and right L-shaped hinge members pivotally connect the free ends of the left and right article placement plates so that they are separated from each other when the product is unfolded. folding trolley. and a pair of left and right arm members having both ends pivotally attached to the left and right hinge members and the slider. 5. The folding cart according to any one of 4. 6. A folding trolley according to claim 1, wherein an operating handle is provided at the upper end of said connecting rod.

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