JPH04110270A - Portable collapsible cart - Google Patents

Abstract

PURPOSE: To accommodate a cart in a carrying bag in order for one person to carry it by forming right and left side frames and crosspieces so as to be folded from about their center parts, and separating a handle into right and left parts to be folded on a carrier. CONSTITUTION: An upper lateral frame-rod 58 is removed from the top of a left side vertical rod 53 and turned around an inward pivoting part 56, and is folded into an internal space of the right side vertical rod 51. Likewise, a lower lateral frame rod 54 is removed from an internal space of the right side vertical rod 51 and turned around its insise pivoting part 56, and is then folded in an internal space of a left side vertical rod 53. The vertical rods 51, 53 are respectively in state where they abut on rear side frames 14, 24. When a user holds respective crosspieces 30 to press their center parts, the respective crosspieces 30 are turned around pivoting pins 32. Spring force used for energizing the respective crosspieces 30 in straight positions, is easily overcome by the pushing operation of the user, and a right sideframe 12 and a left side frame 22 are easily held together. Internal spaces of the right side frame 12 and the left side frame 22 accommodate the crosspieces 30 until the right side frame 12 and the left side frame 22 reach a state where they are slidably in contact with each other.

Description

Detailed Description of the Invention (a) Industrial Application Field The present invention provides a portable folding cart, in particular a handle that is foldable and telescopically telescopic, and a handle that can be attached to a loading platform. Furthermore, by making the loading platform itself freely foldable around its axis, it is possible to create an overall compact storage configuration, and it can be carried in a carrying hang that can be carried by a person. This relates to a portable foldable cart.

(B) Problems to be Solved by the Prior Art and the Invention Many devices and devices have been devised in the past to facilitate the work of moving or conveying objects from a certain location to a pond. Ever since the invention of the wheel, people have known that it is easier to move objects by pushing them than by lifting them.

In recent years, there has been a need for small, portable, and compact carts that can be used immediately at home or in the office when needed.

Currently, typical non-foldable shopping carts are used in supermarkets. However, such shopping carts are large and bulky, and it is difficult to secure space to store them in a typical home or office.

It is also inconvenient to put things into a shopping cart. This is because the objects are so small and light that they spill over the sides of the cart.

On the other hand, smaller shopping carts have also been developed. Such carts are foldable and convenient for storage. However, the cargo loading space of such a cart is small, and the cargo to be transported must be lifted and stored in a basket. Additionally, the allowable load weight is also limited.

Additionally, many offices use flat head carts to transport heavy items. However, because these carts are large in their overall shape (generally 6 feet long with handle height 3 to 4 feet above floor level),
It is not suitable for use in offices or households.

Furthermore, such bed-type carts cannot be folded into a compact size for storage, and are too heavy to be carried by humans, making it difficult to transport the carts from one point of use to another. It was difficult.

Also, when traveling, a small, portable cart is needed. On the other hand, such trips often require carrying a lot of hangers and other accessories. However, conventional carts using this type of folding rank are very small.
It is almost impossible to stack more than two hangers. Therefore, it is of course impossible to carry other accessories necessary when traveling, especially when traveling abroad.

This calls for a portable folding cart that can hold over 300 pounds of bags and accessories, folds into a compact storage configuration, and is easily transported by a person. . Additionally, such portable folding carts must be compact enough to be stored in an overhead storage compartment or under a seat on an airplane.

SUMMARY OF THE INVENTION An object of the present invention is to provide a novel portable foldable cart that can solve the above problems.

The present invention itself can be easily folded into a compact storage configuration, stored in a carrying handle, and -
The purpose is to provide a cart for transporting cargo that can be carried by people.

The present invention also provides a substantially rectangular loading platform consisting of a collapsible side frame and a collapsible horizontal crosspiece, a pair of vertical rods each consisting of a component that expands and contracts like a telescope, and a pair of vertical rods that connect the vertical rods to each other. To provide a portable and foldable cart consisting of a handle consisting of a horizontal frame rod and a plurality of wheels attached to a loading platform.

(C) Means for Solving the Problems The present invention connects the right side frame and the left side frame by a horizontal crosspiece to form a rectangular frame-shaped loading platform, and a rectangular handle is vertically disposed at one end of the loading platform. The left and right side frames can be folded from approximately the center, the horizontal bars can also be folded from approximately the center, and the handle can also be folded onto the loading platform with the left and right separated. This invention relates to a portable folding cart characterized by the following.

The present invention also provides a configuration in which wheels are attached to the lower surface of the loading platform, a left and right vertical rod in which the handle is pivotally attached to one end of the left and right side frames, and an upper horizontal rod in which the upper and lower ends of the left and right vertical rods are installed on the same dirt floor. and a lower horizontal frame rod, and the left and right vertical rods are expandable and retractable in the axial direction. The structure is such that the right side vertical rod and the left side vertical rod are formed from rods having a U-shaped cross section, and the opening surfaces are made to face each other, and the upper horizontal rod is placed inside the right side vertical rod. In addition to providing a pivot for rotatably mounting the left vertical rod, a pivot for rotatably mounting the lower horizontal rod is provided on the inner surface of the left vertical rod, and each vertical rod nests multiple rods. It is also characterized by its configuration.

(d) Actions and Effects With the above-described configuration, the present invention has the following actions and effects.

When folding the cargo platform into a compact storage format,
First, the horizontal frame rods are removed from one vertical rod and rotatably folded onto the other vertical rod. Next, each vertical rod is folded relative to its respective side frame. Furthermore, each of the left and right side frames and horizontal bars are folded along their longitudinal direction. This folded cart is very compact and can be easily stored in a carrying bag or the like, and can be easily carried by a person.

(e) Examples Hereinafter, the present invention will be explained in detail based on examples shown in the accompanying drawings.

FIG. 1 shows a portable folding cart 10 according to the present invention.
Shown unfolded.

The portable folding cart 10 generally has a rectangular shape and includes a right side frame 12 and a left side frame 22.

The right side frame 12 includes a rear side frame 14 and a front side frame 16 that are interconnected at a pivot joint, and the pivot joint is generally connected to the right side frame 1.
Located at the midpoint of 2. Similarly, the left side frame 22 includes a rear side frame 24 and a front side frame 26 that are interconnected at a pivot joint located approximately at the midpoint of the left side frame 22 .

A first bracket 80 is provided on the lower surface of the rear end of each rear side frame 14.24, while a second bracket 82 is provided at the front of each front side frame 626.

A pivot pin 84 connects each first bracket 80 and a second bracket 82 superimposed thereon, and holds them rotatably relative to each other.

A plurality of horizontal bars 30 connect the right side frame 12 and the left side frame 22 to form the base of a portable foldable cargo platform 10. Then, on the base, cargo to be delivered to a desired location is placed or loaded.

Each crosspiece 30 consists of two rods connected by a pivot pin 32 at approximately the center thereof. As is clear from FIG. 6, each pivot pin 32 is fitted with a spring 34 for forming a spring-biased pivot joint, and this spring 34 is attached to the crosspiece 30 shown in FIG. The device is biased toward being held in an unfolded position, a straight position, or a deployed position.

In the preferred embodiment of the invention shown in FIG. 6, the pivot pins 32 are of sufficient size to provide structural support for the rungs 30. That is, as will be described later, the pivot pin 32
has a stepped bar shape.

Each end 33 of the pivot pin 32 is attached to a through hole provided in the main body of the horizontal bar 30, and the pivot pin 32 is held in the horizontal bar 3Ω. In this example, all the pivot points are formed by the method described above, which provides sufficient mechanical strength to the inner channel of the rod or frame with a U-shaped cross section forming each part of the cart according to the invention. can give.

In other embodiments, each horizontal bar 30 can be fixedly connected to the right side frame 12 and the left side frame 22 by welding or the like. Such a connection method is applicable to this portable folding cart 1.
It can be similarly used to connect other non-folding points of 0. Alternatively, other non-stick connecting means such as bolts may be used.
It can be used to connect other non-folding parts of the portable foldable cart 10.

A handle 50 is connected to the tips of the right side frame 12 and the left side frame 22. The handle 50 includes a right vertical rod 51 and a left vertical rod 53. Each vertical rod is attached to the tip of each side frame, and each vertical rod is comprised of a plurality of telescopic telescoping components 55 to extend the handle 50 to a height suitable for the user. be able to.

Each telescoping component 55 is equipped with conventional clamping means, and the amount of expansion and contraction of the telescoping component 55 can be adjusted to achieve the length desired by the user. Instead of clamping means,
Other adjustment means, for example adjustment screws or bottles, may also be used.

The proximal ends of the right side frame 12 and the left side frame 22 are each provided with a bracket extending in a direction perpendicular to the side frame 12, 22, forming a T-shaped portion.

And, the Brakent 60 is as explained below.
The lower ends of the right vertical rod 51 and the left vertical rod 53 can be stored and supported.

Further, a lower horizontal frame rod 54 is interposed between each granket 60, and the lower horizontal frame rod 54 has an inner pivot portion 5 at one end thereof.
6, and is rotatably supported by a bracket 60 by a pivot support 56. And bracket 60
is located at the base end of the left side frame 22.

An upper horizontal rod 58 is interposed between the upper ends of the right vertical rod 51 and the left vertical rod 53, and the upper horizontal rod 58 has one end pivoted inside the top of one of the vertical rods, Upper horizontal frame 5
8 is rotatably connected to a vertical rod.

In a preferred embodiment of the invention, the upper transverse rod 58 is connected to the top of a different vertical rod than the vertical rod to which the lower cross rod 54 is connected. For example, as shown in the figure, on the right vertical rod 51. With this configuration, when the cart is folded in the manner described below, sufficient space can be secured for folding the lower horizontal frame 54 and the upper horizontal frame 58.

As shown in FIG. 2, each bracket 60 has a vertical rod 5L.
The guide groove 64 is provided with a long guide groove 64 extending in the same direction as the right vertical rod 51 and the left vertical rod 5.
A guide pin 62 attached to the lower end of 3 is slidably inserted.

Then, with the guide pin 62 located at the uppermost end of the guide groove 64, the left and right vertical rods 51, 53 can be folded toward the loading platform 10.

Further, a pair of constant direction wheels 70 are attached to the lower surface of the rear side frame 14.24 via a wheel mount 71. On the other hand, a pair of caster wheels 72 are attached to the lower surface of the front side frame 16.26 via a wheel mount 73,
This allows the portable folding cart 10 to be moved between work sites while rolling on its wheels. A known wheel brake 74 is mounted on at least one wheel unit to prevent the wheels from rolling and moving the portable folding cart 10 when it has to stop.

As a preferred embodiment of the present invention, a portable foldable cart 1
Each frame or rod forming rod of 0 is formed from a metal material having a U-shaped cross section. Such a U-shaped cross section can secure the internal space necessary for mutually folding the frame or the rod-forming pieces when the portable foldable cart IO is folded and stored. As described above, this internal space is reinforced by the stepped bar-shaped support bin 33.

FIG. 1 shows a portable collapsible cart 10 in a fully extended position. In this state, the telescopic components 55 of the right vertical rod 51 and the left vertical rod 53 are fully extended, and the upper horizontal rod 58 extends between the tops of the right vertical rod 51 and the left vertical rod 53. One end of the upper horizontal rod 58 is rotatably supported inwardly on the upper part of the right vertical rod 51, and the other end is fitted into the internal space of the left vertical rod 53.
This closes the top of the left vertical rod 53.

Similarly, the lower horizontal rod 54 is connected to the right vertical rod 51 and the left vertical rod 5.
One end of the lower horizontal rod 54 is rotatably supported inwardly at the bottom of the left vertical rod 53, and the other end is fitted into the internal space of the right vertical rod 5. It is worn. In this fully extended or fully deployed state, the portable folding cart 10 can be used to move luggage around the home, office, or travel destination, such as an airport. The telescoping component 55 is suitable for a user to easily grip the upper crossbar 58 of the handle 50 in order to push or pull the portable folding cart 10 to move cargo. It can be raised to a higher height.

FIG. 2 shows the first step when folding the portable foldable cart 10.
Showing stenbu. The upper horizontal rod 58 is removed from the top of the left vertical rod 53, rotated around the inner pivot 56, and folded into the internal space of the right vertical rod 51. Similarly, the lower horizontal rod 54 is removed from the internal space of the right vertical rod 51, rotated around its inner pivot portion 56, and folded into the internal space of the left vertical rod 53. Each telescoping component 55 is contracted so that the right vertical rod 51 and the left vertical rod 53 each have the length of one telescoping component.

Next, the guide pins 62 attached to each bracket 60 are loosened so that the right vertical rod 51 and the left vertical rod 53 can slightly slide upward within the guide groove 64 of the bracket 600. As a result, each vertical rod rotates around the guide pin 62, and is folded into contact with the rear side frame 4 and the rearward leg portion 24, respectively. In the fully extended state shown in FIG. 1, the lower ends of the right vertical rod 51 and the left vertical rod 53 are securely fixed within the internal space of the bracket 60, allowing the portable foldable cart 10 to be used for transporting cargo. This prevents the handle 50 from being folded during use.

FIG. 3 shows the next steps in folding the portable folding cart 10. The vertical rods are folded so that each vertical rod is in abutment with the respective rear jamb 14,24. The user grasps each horizontal bar 30 and slightly pushes the center portion thereof, so that each horizontal bar 30 rotates around the pivot pin 32.

The force of the springs 3,1 used to bias each crosspiece 30 into the linear position shown in FIG. Easily integrated. The internal space of the right side frame 12 and the left side frame 22 accommodates the horizontal beam 30 until the right side frame 12 and the left side frame 22 come into sliding contact.

FIG. 4 shows the next step in folding the portable folding cart 10. Each vertical rod is folded into abutment with the rear side frame 1424. Each horizontal beam 30 is folded around the pivot pin 32 and stored in the internal space of the right side frame 12 and the left side frame 22. In this state, the right side frame 12 and the left side frame 22 are in contact with each other. The right side frame 12 and the left side frame 22 are each folded around the pivot pin 84 to further fold the portable foldable cart 10.

Finally, FIG. 5 shows the portable folding cart IO in its fully folded state. The wheels 70.
2 can be staggered with respect to each other, allowing the portable folding cart 10 to be folded into a very compact configuration. - by mounting the force direction wheels 70 close to the tip of the portable foldable cart IO; can be supported.

In a preferred embodiment, the portable collapsible cart 10 is approximately 31 inches long, approximately 15 inches wide, and approximately 36 inches tall when fully extended and activated. However, when fully collapsed, cart 10 measures approximately 16 inches long, 6 inches wide, and 3 inches tall. In this way, it becomes a compact folded form,
Can be easily stored in a carrying bag.

In a preferred embodiment, the portable folding cart 10 is constructed from lightweight steel or aluminum, and the overall weight of the portable folding cart 10 is approximately 7-8 Bond. Since the cart 10 is thus lightweight, even one person can carry it.

On the other hand, since the cart 10 has sufficient rigidity, even 300-bond cargo can be easily transported by hand.

Furthermore, other embodiments are shown in FIGS. 7 to 11.

As shown in the figure, in this embodiment, the horizontal beam 130, the upper horizontal beam 158, and the lower horizontal beam 154 are formed of flat bars in order to reduce the overall weight of the cart and facilitate assembly. It is characterized by

The other configurations of the portable folding cart according to this embodiment are substantially the same as those of the portable folding cart described with reference to FIGS. 1 to 6, so the same reference numbers will be used. It is expressed by adding 100 to .

In this embodiment as well, when folding the cart to make it into a compact storage form, first
is removed from one vertical rod 151, 153 and rotatably folded onto the other vertical rod 153, 151.

Next, each vertical rod 151, 153 is folded against the respective left and right side frames 112, 122. Furthermore, each left and right side frame 112. And the horizontal crosspiece 130 is folded along its longitudinal direction. Such a folded cart is very compact and can be easily stored in a carrying hanger or the like, and can be easily carried by a person.

Although the present invention has been described above with reference to several embodiments, these embodiments are merely illustrative and do not limit the present invention in any way. It will be apparent to those skilled in the art that all modifications and additions are included in the invention. Therefore, the present invention is not limited to the content described above, but is defined only by the following claims.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a portable folding cart according to the present invention in a fully unfolded state. FIG. 2 is a perspective view of the portable foldable cart according to the invention in a partially folded state with the handle folded down; FIG. 3 is a plan view of the portable foldable cart according to the invention in a semi-folded state with the handle fully folded and the crossbar partially folded. FIG. 4 is a side view of the portable foldable cart according to the invention in a semi-folded state, with the handle and crossbar fully folded and the side frame partially folded. FIG. 5 1 is a side view of a portable foldable cart according to the present invention in a completely folded state. FIG. 6 is a partial end view V of the portable foldable cart according to the present invention, showing how the joint of the crosspiece is formed. FIG. 7 is a perspective view of another embodiment of the portable foldable cart according to the present invention in a fully unfolded state. FIG. 8 is a plan view of the cart in its fully unfolded state. FIG. 9 is a plan view of the cart in a semi-folded state. FIG. 10 is a plan view of the cart in a completely folded state. FIG. 11 is a sectional view taken along the line II in FIG. 8. In the figure: 10; Loading platform 12; Right side frame 30;

Claims (1)

[Scope of Claims] 1. A right side frame and a left side frame are connected by a horizontal crosspiece to form a square frame-shaped loading platform, a square-shaped handle is hung from one end of the loading platform, and the left and right side frames are connected to each other by a horizontal crosspiece. The mobile phone is characterized in that it can be folded freely from approximately the center, the horizontal bar can also be freely folded from approximately the center, and the handle can also be folded on the loading platform with the left and right sides separated. A foldable cart. 2. The portable foldable cart according to claim 1, wherein wheels are attached to the lower surface of the cargo platform. 3. The handle is formed into a rectangular frame shape from left and right vertical rods pivotally connected to one end of the left and right side frames, and an upper horizontal rod and a lower horizontal rod installed between the upper ends and lower ends of the left and right vertical rods, The left and right vertical rods are freely expandable and retractable in the axial direction, and the base end of each horizontal rod is pivotally supported on one side vertical rod, and the tip thereof is detachably engaged with the other side vertical rod. A portable folding cart according to claim 1. 4. The right vertical rod and the left vertical rod are formed from rods having a U-shaped cross section, and the opening surfaces are opposed to each other, and a pivot part is used to rotatably attach the upper horizontal rod inside the right vertical rod. 4. A portable foldable cart according to claim 3, further comprising a pivot portion on the inner surface of the left vertical rod for rotatably attaching the lower horizontal rod. 5. The portable folding cart according to claim 1, wherein each vertical rod is constructed of a plurality of rods in a nested manner. 6. Each side frame has a rear side frame and a front side frame arranged in series,
Further, a bracket is provided on the lower surface of the front end of the rear side frame and the lower surface of the rear end of the front side frame, respectively, and the lower portions of both brackets are pivotally connected to each other by a pivot pin. A portable folding cart according to claim 1. 7. According to claim 1, each of the horizontal beams is configured to be foldable by a pivot portion provided substantially in the center thereof, and both ends thereof are pivotally connected to the left and right side frames by pivot pins, respectively. portable folding cart. 8. The portable foldable cart according to claim 1, wherein a biasing spring that constantly biases the left and right components in the deployment direction is attached to the pivot portion provided approximately at the center of each horizontal bar. . 9. The portable foldable cart according to claim 1, wherein the main body of the pivot pin used for the pivot of the horizontal crosspiece is formed to have a larger diameter than the pivot shafts located at both ends. 10. The portable folding cart according to claim 2, wherein the wheels are formed of a plurality of unidirectionally movable wheels and a plurality of rotatable wheels with casters. 11. The portable foldable cart according to claim 10, further comprising a brake piece provided around at least one wheel with casters for braking the wheel by compressing the bracket. 12. A cylindrical bracket extending in a direction perpendicular to the side frame is attached to one end of each side frame to form a T-shaped part, and the lower end of the vertical rod can be slidably fitted and fixed into the cylindrical bracket. A long guide groove is provided in the side wall of the cylindrical bracket in the direction in which the vertical rod extends, and a guide pin attached to the lowest end of the vertical rod is loosely fitted into the guide groove and guided in the guide groove. 2. A portable foldable cart according to claim 1, wherein the left and right vertical rods are folded toward the loading platform by pulling up the left and right vertical rods while guiding the pins. 13. Claim 1 characterized in that a plurality of horizontal bars are provided.
The folding cart described.