JP2010264970A - Improved foldable six-wheeled trolley structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a novel structure of a six-wheeled trolley that is transported and stored by a remarkably simple method. <P>SOLUTION: The trolley structure includes a trolley framework 1 having a lower part 2 and an upper part 3 that are articulated. The lower part 2 is connected to a pair of wheel holders 4, the wheel holders 4 are used for both sides of the trolley framework 1. Each of the wheel holders 4 includes three projected frames extending radially and having three projections formed at intervals of 120 degrees, and each wheel 5 revolves thereon. The lower part 2 revolves upwardly by a locking and unlocking assembly provided on an intersecting member 7 serving as a handle with the trolley folded. The trolley framework 1 includes a plurality of compartment structures and further supports at least an article holding bag 15 including a highly insulating compartment. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an improved folding six-wheel trolley structure.

Trolleys for transporting objects and articles having a pair of wheels and including a trolley skeleton that supports a bag or other container are already known.

The conventional trolley described above is often used as a shopping cart and includes a handle that is usually gripped by the user to pull the trolley by rotating on its two wheels.

Conventional trolleys have a foldable structure and include several mechanical systems that allow the trolley to be opened and closed easily and quickly.

It is an object of the present invention to provide a novel foldable six-wheel trolley structure that can be transported and stored in a very simple manner when not in use.

Within the scope of the above-mentioned objects, the main object of the present invention is to provide a foldable trolley structure which is particularly useful for the transport of perishable food products such as frozen products.

Another object of the invention is to provide a trolley structure which has a very strong structure and a very high load holding capacity, while being able to be used in a very simple manner.

Yet another object of the present invention is to provide such a trolley structure that is very reliable and safe during operation due to its specifically designed structural features.

In one aspect of the invention, the intent and objectives described above, as well as other objectives that will become clearer in the following, are achieved by an improved foldable six-wheel trolley structure that includes articulated lower and upper parts. Including a trolley structural frame, wherein the articulated lower portion is associated with a pair of wheel holders, each of which being characterized for a side of the trolley skeleton.

Each wheel holder includes a holder frame that includes three radially extending protrusions spaced 120 degrees apart from each other and each wheel rotating above.

The wheel holder is rotated in turn or connected to the lower part of the trolley skeleton by connecting the hub so that the wheel holder can rotate completely.

  When the trolley structure is in the folded state, the lower part is rotated upwards by means of locking and unlocking means arranged on the transverse member that functions as a trolley handle.

The trolley frame supports an article holding bag including a plurality of bag sections including at least a section having high heat retention.

Additional features and advantages of the present invention will become more apparent hereinafter from the detailed disclosure of the preferred but non-limiting embodiments of the present invention, which represent illustrative but not restrictive examples in the accompanying drawings. Therefore:
1 is a perspective view of the folding trolley structure of the present invention in its use state; FIG. 2 is a side view showing the trolley structure of the present invention in its use state; FIG. 3 is a perspective view illustrating an operation mode for closing the trolley structure; FIG. 4 is an elevation view showing the start of the closing operation of the trolley; FIG. 5 is an enlarged perspective view with respect to the above view showing in detail the upper rotating or connecting region of the trolley skeleton to the bottom of the trolley skeleton; and FIG. 6 is a perspective view showing the trolley structure in a retracted state for easy transportation or storage.

With respect to the number of references in the above figures, the trolley structure of the present invention is generally indicated by reference numeral 1 including a trolley skeleton including a lower rotating or connecting portion 2 and an upper portion 3.

The lower part 2 is associated with a set of wheel holders 4, each for the side of the trolley skeleton.

Each wheel holder 4 includes a holder frame that includes three radially extending protrusions disposed at 120 ° relative to each other on which each wheel 5 rotates.

Each wheel holder 4 is further rotated or connected to the lower part 2 of the trolley skeleton by rotating means 6 which allow the wheel holder to rotate through 360 °.

  The six-wheel arrangement of the trolley structure allows the trolley to be carried even on stairs and in general the trolley can easily get over a stepped structure such as a sidewalk or pavement.

  As shown, the lower part 2 of the trolley skeleton includes a transverse member suitable for use as a trolley handle in its upper part in the folded state of the trolley, the transverse member locking and securing the top or upper part 3. Includes locking and unlocking means for unlocking.

  Locking and unlocking means are disposed at the end portions 9 of the cross member 7 and are adapted to engage respective hook elements 10 integral with the upper part 3 of the trolley skeleton or other locking elements 12 or other locking elements. It includes a push button 8 that moves the element.

  The top 3 of the trolley skeleton is then essentially ring-like in which one or more protrusions 13 are provided therein which are provided to engage the flaps 14 of the article-holding bag, usually indicated by reference numeral 15. Or an annular handle or gripping means 11;

  The article bag 15 is connected at its upper part to the handle 11 and is supported at its lower part by a support assembly 16 integral with the lower part 2 of the trolley skeleton.

The support assembly 16 has a U-shape and includes a support bar 17 that pivots relative to the trolley skeleton by a lateral reinforcing rod element 18.

  Conveniently, the article bag 15 includes a plurality of compartments and at least a highly heat-insulating compartment of a blower arrangement for transporting perishable food products such as frozen products.

1 and 2 show the folding six-wheel trolley structure of the present invention in its use state, where the lower and upper portions of the trolley skeleton are locked together in their unfolded position, and the article bag 15 is a trolley handle. 11 is engaged or latched to hold on the support assembly 16 when the bag is full.

  By gripping the trolley handle 11 in this manner, the trolley can be easily slid and moved on any desired surface, and a pair of two three-wheel feeds can be used for stairs and for example steps, platforms You can move on any type of obstacle like any other.

At the end of its use, the trolley simply separates the hook element 12 and simply pushes the pushbutton of the cross member 7 to turn the upper part 3 of the trolley skeleton to bring it into a position substantially parallel to the trolley skeleton lower part 2. By moving 8, it can be quickly and easily folded.

  In such a folded state, the skeleton structure 1 occupies very little space and can be easily transported using a cross member as a handle.

  It has been found that the present invention achieves the fully planned intent and objectives.

  In the practice of the present invention, as with the associated size and shape, the materials used may be any depending on the requirements.

DESCRIPTION OF SYMBOLS 1 Trolley frame 2 Lower part 3 Upper part 4 Wheel holder 5 Wheel 7 Cross member 8 Button 9 Both-ends part 10 Hook element 11 Handle 13 Protrusion 14 Flap 15 Article holding bag 16 Support assembly 17 Support part 18 Reinforcing rod element

Claims (8)

An improved folding six-wheel trolley structure,
The trolley structure includes a trolley skeleton including an articulated skeleton lower portion and a skeleton upper portion, the lower portion being associated with a pair of wheel holders, each of the holders being for both sides of the trolley skeleton, The wheel holder includes a holder frame including three radially extending protrusions spaced at 120 ° relative to each other, on which each wheel pivots, each of the wheel holders Pivoting with respect to the lower part of the trolley frame by means of a pivoting hub, allowing the wheel holder to perform a full 360 ° rotation, and when the trolley structure is in its folded state, the lower part of the trolley frame Is pivoted with respect to the upper part of the trolley by means of locking and unlocking means arranged on the transverse member functioning as a trolley handle, An improved foldable six-wheel trolley structure characterized in supporting an article-holding bag comprising a plurality of bag compartments, including at least a heat retaining compartment. The locking and unlocking means is disposed at the distal end of the cross member and is a pushbutton locking pin or other locking element suitable for integrally engaging the respective hook element with the upper portion of the trolley skeleton. The trolley structure of claim 1, characterized in that it comprises: The trolley skeleton upper portion includes a handle, such as an essentially ring, characterized in that one or more protrusions are formed therein suitable for engaging a flap of the article bag. The trolley structure according to 1. The trolley structure according to claim 1, characterized in that the article bag is connected to the handle at an upper part thereof and supported by a support assembly integral with the lower part of the trolley skeleton at a lower part thereof. The trolley structure of claim 4, wherein the support assembly is characterized by including a U-shaped support bar that pivots relative to the support assembly by a lateral reinforcing rod element. The trolley structure of claim 1, wherein the article bag is characterized in that it includes a plurality of bag compartments including at least a bellows-type highly heat-retaining compartment for transporting perishable foods such as frozen products. The foldable six-wheel trolley structure shows the lower and upper parts of the trolley frame that are locked together in an expanded position in use, the article bag is connected to the handle, and the bag is full and the support The trolley structure of claim 1 characterized in riding on an assembly. The trolley can be easily and quickly folded by moving the push button of the cross member so that the hook element is separated and the upper portion of the trolley skeleton is rotated to a position substantially parallel to the lower portion of the trolley skeleton. And, in such a folded state, the trolley structure occupies very little space and is characterized in that it is suitable for being easily transported by using the cross member as a handle, The trolley structure according to claim 1.