KR20110032139A - Extensible and foldable moving carrier - Google Patents

Abstract

PURPOSE: An expendable and foldable moving cart is simultaneously provided to simultaneously load and unload goods without a standby time by removing the limitation of goods size. CONSTITUTION: An expendable and foldable moving cart comprises a main body pallet(100), a foldable handle(200), an expansion pallet(300), a foldable expansion unit, and an anti-twist unit(500). The main body pallet is formed into a square plate shape, and goods are loaded on the upper side. A plurality of casters(102) is installed on the lower side of the main body pallet to make the movement and redirection facilitate. The foldable handle is located to be folded toward one side of the main body pallet. The height of the foldable handle can be adjusted according to the height of a user as an antenna type. The expansion pallet is formed into the plate shape of square and is located on the other side of the main body pallet. A plurality of casters for movement, redirection and load support is installed on the lower side of the expansion pallet. One side of the foldable expansion unit is combined in the other lower side of the main body pallet. The anti-twist unit is symmetrically located in left and right side of the main body pallet.

Description

Extensible and foldable moving carrier

The present invention relates to an expandable and collapsible mobile trolley, and more particularly, to form an extended pallet so as to be expandable on the front side of the main body pallet of the mobile trolley, so that the front and rear widths are easily varied by the user. The present invention relates to an expandable and collapsible mobile truck which can not only load objects but also expand the left and right widths so that a large quantity of goods can be loaded at one time.

In various industrial sites, there are many cases in which various parts or products being produced or finished products have to be moved to a specific place in a workplace, and in this case, a working transport truck is used.

These trolleys are developed in various structures according to the type of goods to be transported or their use, the most common form is to install a plurality of casters on the bottom of the loading table to facilitate the movement and change of direction, one side of the loading cart The handle is installed so that it can be moved by manpower by pushing it, and it is mainly provided in the dump so that several companies can use it jointly.

However, the conventional working transport cart as described above is limited to a certain size of the loading table to load the cargo to transport the bulky goods must be equipped with a separate transport cart suitable for large goods available to use There was a size limitation.

Therefore, when the goods are transported in a conventional work cart, the quantity of the goods loaded on the loading table is limited, and when the transport of many goods is required, the number of the cars is limited, and the waiting and the procedure are always required to use the truck. While waiting for a long time, there are a number of problems such as delay of delivery time of goods, delay of delivery of stopovers, delay of turn, etc., resulting in lower work productivity of DM (Direct Marketing). In addition, the conventional trolley has a problem that it is quite inconvenient when it is stored in a large volume and transported to a specific place or used after storage.

The present invention is devised to solve various defects and problems caused by the use of the transport truck for the conventional operation in view of the above situation, the object of the present invention is easily expandable to the front of the truck, and can be extended from side to side It is easy to transport a large amount of goods at once, and the size constraints of the goods are significantly improved to provide an expandable and collapsible mobile truck that can deliver the goods at the same time as there is no waiting time when using the balance.

Another object of the present invention is to minimize the volume as the expansion pallet is configured to be folded and folded with the main body pallet, the handle is also folded and folded on the main body pallet, convenient storage and movement, the handle on the user's key According to the present invention, it is possible to adjust the height and provide an expandable and collapsible mobile cart which increases user convenience due to various configurations that improve user convenience, such as tool storage required by the user when using the mobile cart.

In order to achieve the above object, the expandable and collapsible movable truck according to the present invention is formed in a rectangular plate shape, and an object is loaded on the top surface, and a plurality of casters 102 are installed on the bottom to facilitate movement and direction change. A main body pallet 100 having symmetrical protrusions 104 formed on left and right sides thereof; A folding handle (200) provided to be foldable to one side of the main body pallet (100), the antenna handle being provided to be height-adjustable according to a user; It is formed in the shape of a square plate, located on the other side of the main body pallet 100, a plurality of casters 302 for movement and direction change and load support is installed on the bottom surface, the same as the locking projection 104 on the left and right sides An expansion pallet 300 having the fixing protrusions 304 symmetrically formed on the line; One side is coupled to the bottom of the other side of the main body pallet 100, the other side is coupled to the bottom of the expansion pallet 300, the expansion pallet 300 is extended to the other side of the main pallet (100), when the expansion pallet 300 is stored Folding and extending means (400) provided to be pivoted to the bottom of the main body pallet (100); It includes; and the torsion preventing means 500 is symmetrically provided on the left and right sides of the main body pallet 100, the expansion pallet 300 is provided to prevent the left and right twist from the main body pallet (100).

Here, when the expansion pallet 300 is pivoted and folded by the folding expansion means 400, a plurality of casters 304 of the bottom surface of the expansion pallet 300 are inserted into the bottom of the main pallet 100. One caster insertion groove 106 is characterized in that it is formed.

In addition, when the expansion pallet 300 is swiveled by the folding expansion means 400 and folded on the side surface of the main pallet 100, the extended pallet 300 overlaps with the main pallet 100. Locking means 600 is characterized in that it is further formed to maintain as it is.

On the other hand, it is preferable that the accommodating part 110 is further formed on one side of the upper surface of the main body pallet 100, and is symmetrically formed to be able to be pulled in and out of the left and right sides of the main body pallet 100 and on the upper side of the main body pallet 100. When the article is loaded, the first extension wire 120 that is bent in a "b" shape may be formed to prevent the article from being separated from side to side.

On the other hand, the folding handle 200 is a hinge pin (210); A plurality of " ┗┛ " rotating brackets 220 which are bolted symmetrically to one side of the upper surface of the main body pallet 100; The "형성된" -type pivot bracket 220 is hinged by a hinge pin 210, the left and right sides are formed in multiple stages to enable height adjustment "┏┓" antenna folding handle 230; characterized in that formed It is done.

In addition, when the expansion pallet 300 is pivoted by the folding expansion means 400 on the bottom surface of the expansion pallet 300 and is folded on the bottom surface of the main pallet 100, the bottom of the main pallet 100 is provided as an extension pallet side bottom surface. The second caster insertion groove 306 is formed symmetrically formed on the bottom left and right sides of the main pallet side of the expansion pallet 300 so that the plurality of casters 102 are inserted.

On the other hand, the expansion pallet 300 and the expansion pallet 300 is a departure prevention member 310 which is rotated 90 degrees to prevent the front departure of the object to one side of the upper surface; The second extension wire 320 is formed to be symmetrically formed to be able to draw in and out on the left and right sides, and bent to a “b” shape to prevent the object from being separated from side to side when the object is placed on the upper surface of the expansion pallet 300. It is characterized by.

Further, the folding means 400 is at least one fixed hinge piece 410 is coupled to the bottom surface of the main body pallet 100; At least one or more pivoting hinge pieces 420 that are pivotally coupled to the fixed hinge pieces 410 and have guide bars 422 elongated in the longitudinal direction; The guide bar 422 of the swing hinge piece 420 is provided with a cylinder 432 stepped to be slidingly coupled, at least one or more fixedly coupled to the bottom surface of the expansion pallet 300 facing the main pallet 100 A cylinder body 430; And a piston head 440 coupled to form an end at the end of the guide bar 422 such that the guide bar 422 slidingly coupled to the cylinder 432 is not separated from the cylinder 432.

On the other hand, the torsion preventing means 500 is formed in a long bar (bar) shape, is coupled to each other symmetrically to the left and right sides of the main body pallet 100 is pivotally coupled to the pivoting to the expansion pallet 300 side, turning On one side of the opposite side of the center is characterized in that a plurality of fitting grooves 502 are fitted to the engaging projection 104 of the main body pallet 100 and the fixing projections 304 of the expansion pallet (300).

The present invention can be easily extended by the user to the front of the truck, and can be easily moved to the left and right, so that a large amount of goods can be transported at once, and the size constraints of the goods are significantly improved, so there is no waiting time when using the truck. It has the advantage of being able to deliver the goods.

In addition, the present invention can minimize the volume as the expansion pallet is folded and folded with the main body pallet, and the handle is also folded and folded on the main body pallet, so that the storage and movement is convenient, the handle according to the user's height In addition to allowing height adjustment, the user convenience is increased due to various configurations that improve user convenience, such as tool storage required when the user uses a mobile cart.

Exemplary embodiments of an expandable and collapsible mobile truck according to the present invention as described above will be described in detail with reference to the accompanying drawings.

1 is an overall perspective view of the expandable and foldable mobile trolley according to the present invention, Figure 2 is a full exploded perspective view of the expandable and foldable mobile trolley according to the present invention, Figure 3 is an expandable and foldable mobile trolley according to the present invention Is an enlarged perspective view of the main portion of the main pallet, Figure 4 is an enlarged perspective view of the operating state of the folding handle of the folding and folding movable balance according to the present invention, Figure 5 is an expansion pallet of the expandable and foldable movable balance according to the present invention Is an enlarged perspective view of the main portion, Figure 6 is a side cross-sectional view of the use state of the expandable and collapsible mobile truck according to the present invention, Figure 7 is a bottom state perspective view of the expandable and collapsible mobile truck according to the present invention, Figure 8 is the present invention Is an enlarged perspective view of the main portion of the folding expansion means of the expandable and foldable mobile trolley according to the present invention, FIGS. 12 to 14 is a perspective view showing a process of folding in the storage state of the expandable and foldable mobile trolley according to the present invention, Figure 15 is an expandable and foldable movement according to the present invention A side cross-sectional view showing another embodiment of the bogie.

As shown in Figures 1 and 2, the expandable and collapsible mobile trolley of the present invention is configured to be able to stack a number of things at once, and to be folded at a time when the user loads and transports the goods, if necessary By doing so, it is easy to store and can be stored in a narrow place, the main body pallet 100, folding handle 200, expansion pallet 300, folding expansion means 400, torsion preventing means 500, locking means Consisting of 600.

3 and 6, the main body pallet 100 is formed in the shape of a square plate, an object is loaded on the upper surface, and a plurality of casters 102 are installed on the bottom to facilitate movement and direction change. . And, when the expansion pallet 300 to be described later is expanded, the locking projection 104 is symmetrically formed on one side of the left and right sides so that the torsion preventing means 500 to be described later is provided to prevent the torsion to the left and right. Here, the first caster insertion groove 106 is further formed on the bottom surface of the main body pallet 100 as shown in FIG.

The first caster insertion groove is the main pallet 100 by a plurality of casters 304 on the bottom of the expansion pallet 300 when the expansion pallet 300 to be described later is folded and folded by the folding expansion means 400 described later ) Is not completely superimposed, it is nested in an acute state is formed in the urine to prevent the inconvenience of use during storage and transport.

Meanwhile, a rectangular accommodating part 110 recessed toward the bottom surface side of the main body pallet 100 is further formed. In general, when a worker or a user uses a mobile truck, a separate tool or equipment is held in one hand and the mobile truck is turned off in the other hand, so as to solve problems such as safety accidents and damages during transportation of objects. By forming the accommodating part 110, a worker or a user using a trolley accommodates a separate tool or equipment in the accommodating part 110, and then covers a cover (not shown) of the accommodating part 110. Since it is possible to transport by loading the goods on the above, the problem that the goods are broken and broken due to the imbalance of the force during transportation is solved, and the troublesome problem that the worker or the user has to move the truck with one hand is solved.

In addition, as the cover (symbol abbreviation) of the storage unit 110 is opened to stand upwards, it is self-evident that the safer objects can be transported by preventing the departure due to the left and right shaking during the process of moving the truck. It is.

In addition, the first extension wire 102 is symmetrically formed so that the main pallet 100 can be pulled in and out of one side of the main body pallet 100. Here, as mentioned above, the first extension wire 120 is a main pallet 100 in order to prevent the damage caused by the separation of the object due to the left and right shake when moving the object using the balance, such as the balance 100 ) When the object is loaded on the upper surface, the article is bent into a shape of "b" to prevent the object from being separated from side to side, and is slidably drawn out from the left and right sides of the main body pallet 100. Furthermore, the volume of the object loaded by the first extension wire 120 can be expanded in various ways.

The folding handle 200 is attached to the upper surface of the main body pallet 100 is formed to move the main body pallet 100 through an external force of the user, is provided to be foldable to one side of the main body pallet 100, the antenna Equipped with a height adjustable in accordance with the user, as shown in Figure 4, the hinge pin 210, the rotation bracket 220, is composed of an antenna-type folding handle 230.

The hinge pin 210 is formed to be coupled to the antenna-type folding handle 230 to be described later and the rotating bracket 220, it is to be the pivot center. And, as shown, the rotating bracket 220 is formed in a "┗┛" type, it is fixed to the left and right symmetrical bolted to one side of the upper surface of the main body pallet (100).

As described above, the antenna-type folding handle 230 is hinged to the pivot bracket 220 having a "┗┛" shape by a hinge pin 210. Here, the antenna-type folding handle 230 is formed in a "┏┓" shape, the left and right sides are formed in multiple stages to enable height adjustment. That is, by using the folding handle 200 to adjust the height according to the height of the user, it is to maximize the user convenience.

The expansion pallet 300 is located to the front side of the main pallet is formed to be expandable when the user needs, as shown in Figures 5 and 6, is formed in a rectangular plate shape. And, the other side is located on the other side of the main pallet 100, a plurality of casters 302 for movement and direction change and load support is installed on the bottom surface, the obstacle to which the torsion preventing means 500 to be described later coupled to the left and right sides The fixing protrusion 304 is symmetrically formed on the same line as the group 104. Here, the fixing protrusion 304 is rotated by the torsion preventing means 500 to be described later when the expansion pallet 300 is expanded, and fixedly coupled to the fixing protrusion 304 of the expansion pallet 300, the expansion pallet When the 300 is loaded and moved, it is possible to minimize the left and right twist.

Meanwhile, as shown in FIG. 7, a second caster insertion groove 306 is further formed on the bottom surface of the expansion pallet 300. That is, when the expansion pallet 300 is pivoted by the folding expansion means 400 which will be described later, the bottom of the expansion pallet 300 is folded onto the bottom of the main pallet 100 to the bottom of the main pallet 100. The second caster insertion groove 306 is symmetrically formed at the bottom left and right sides of the main pallet side of the expansion pallet 300 so that the plurality of casters 102 provided therein are inserted.

In addition, the separation prevention member 310 which is rotated 90 degrees to prevent the front departure of the object to one side of the upper surface of the expansion pallet 300 is formed. Here, the departure preventing member 310 is rotated by 90 degrees, the user is located on the same surface as the upper surface of the expansion pallet 300 as needed, or as shown, the object is loaded standing up 90 degrees upward It is to prevent the deviation from the front side.

In addition, the second extension wire 320 is symmetrically formed so as to be able to be pulled in and out on one side of the left and right surfaces of the extension pallet 300. Here, the second extension wire 320 performs the same function as the above-described first extension wire 120, so that when the object is placed on the upper surface of the expansion pallet 300, the object is prevented from being separated from side to side. It is formed to be bent in the "b" shape is to slide in and out from the left and right sides of the expansion pallet (300). In addition, the volume of the object loaded by the second extension wire 320 can be expanded in various ways.

The folding expansion means 400 combines the above-described main pallet 100 and the extended pallet 300 into one, and the extended pallet 300 extends from the front side of the main pallet 100 to the bottom. It is provided to be folded to be folded to overlap with the bottom of the main body pallet, as shown in Figure 8, the fixed hinge piece 410, the swinging hinge piece 420, the cylinder body 430, the piston head 440 It consists of

The fixed hinge piece 410 is coupled to at least one bottom surface of one end of the main body pallet (100). Here, the fixed hinge piece 410 is preferably bolted to the bottom of the main pallet.

The pivoting hinge piece 420 is provided with at least one pin is coupled to the fixed hinge piece 410, the swing operation, the guide bar 422 is formed long in the longitudinal direction. Here, the guide bar 422 is slidingly coupled with the cylinder body 430 to be described later. That is, the extension length of the above-described extension pallet 300 from the main body pallet 100 is determined according to the length of the guide bar 422.

The cylinder body 430 is provided with at least one is fixedly coupled to the bottom surface of the expansion pallet 300 facing the main pallet 100. Here, the cylinder body 430 is provided with a cylinder 432 stepped so that the guide bar 422 of the swing hinge piece 420 is slidingly coupled. That is, it has a structure like a syringe.

The piston head 440 is provided to be coupled to the end of the guide bar 422 to form an end, so that the guide bar 422 slidingly coupled to the cylinder 432 is not separated from the cylinder 432, The expansion palette 300 may repeat expansion and contraction on the guide bar 422.

The torsion preventing means 500 is, as mentioned above briefly, when the expansion pallet 300 is moved, separated from the main body pallet 100 to prevent twisting from side to side, it is formed so that the transport of goods safely 1 to 14, the torsion preventing means 500 is formed in a long bar (bar) shape. Then, the main body pallet 100 is symmetrically coupled to one end of the left and right sides, and is axially coupled to be pivoted to the expansion pallet 300 side. In addition, the fitting groove is fitted to the locking projection 104 of the main body pallet 100 and the fixing projection 304 of the expansion pallet 300 on one side of the opposite side of the pivot center of the torsion preventing means 500 ( 502 is formed in plural. In addition, a fitting groove 502 'coupled to the fixing protrusion 304 of the expansion pallet 300 is formed on one side of the pivoted central side.

That is, when the expansion pallet 300 is expanded, the torsion preventing means 500 is pivoted so that the fixing protrusion 304 and the fitting groove 502 are coupled, and the torsion preventing means 500 is reduced or folded. This turning is the engaging projection 104 and the fitting groove 502 is coupled. Thereafter, when the expansion pallet 300 is in close contact with the main pallet 100, the torsion preventing means 500 is turned to the expansion pallet 300 side again, and the fixing protrusion 304 is coupled to the fitting groove 502 '. Even when moving in the original state, it is formed to prevent the left twist of the expansion pallet (300).

The locking means 600 is applicable to a variety of forms, such as clasps, hooks, is provided on the side of the main body pallet (100). The locking means 600 maintains a state in which the expansion pallet 300 is superimposed with the main pallet 100 when the expansion pallet 300 is pivoted and folded by the folding expansion means 400. It is provided to.

Expandable and collapsible mobile cart of the present invention according to such a configuration is expanded as shown in Figs. First, as shown in FIG. 9, the user exerts an external force on the expansion pallet 300 to the front side of the main pallet 100. Thereafter, the cylinder body 430 of the folding expansion means 400 coupled to the bottom of the expansion pallet 300 coupled with the guide bar 422 provided to one side of the main body pallet 100 is forward on the guide bar 422. Move and expand.

Next, as shown in Figure 10, by turning the torsion preventing means 500 which is fitted to the engaging projection 104 of the main body pallet 100, the fixed projection 304 symmetrically formed on the left and right sides of the expansion pallet (300). In combination with the fitting groove 502 to minimize left and right twist.

Next, as shown in FIG. 11, the separation preventing member 310 formed on the upper surface of the expansion pallet 300 is swiveled 90 degrees, and the second extension wire 320 provided on the left and right sides is drawn out. Then, by adjusting the folding handle 200 coupled to the main body pallet 100 to a length suitable for the user's height, by loading the goods, it is possible to carry a larger amount of goods and a safer goods, considering the user's convenience It is possible to carry things more convenient.

On the other hand, after use of the expandable and foldable mobile cart of the present invention, as shown in Figure 12 to 14 during storage. First, as shown in Figure 12, to return the expansion pallet 300 of the extended moving trolley to the original state by the external force of the user, and then to rotate the pivot support piece 420 of the folding expansion means 400. The expansion pallet 300 is positioned on the bottom surface side of the main pallet 100 as shown in FIG. 13 and the main pallet 100 and the extended pallet 300 are provided in a superimposed state.

Thereafter, as shown in FIG. 14, the main pallet 100 and the extended pallet 300 are coupled to each other by the locking means 600 in an overlapped state, and the folding handle 200 (the first extension wire 120) is formed. By folding and retracting the two extension wires 320, it can be stored in a vehicle or a narrow storage place with a minimum volume and can be easily carried in any place requiring a mobile truck.

On the other hand, as shown in Figure 15, it may be formed to penetrate through the first caster insertion groove 106, it is preferable to form a guide bar coupled to the cylinder to increase the durability against the load.

On the other hand, in the detailed description of the present invention has been described with respect to specific embodiments, for those skilled in the art that various modifications are possible without departing from the scope of the invention, such modifications are claimed It is within the scope of the description.

1 is an overall perspective view of an expandable and collapsible mobile truck according to the present invention.

Figure 2 is an exploded perspective view of the expandable and collapsible mobile truck according to the present invention.

Figure 3 is an enlarged perspective view of the main portion of the main body pallet of the expandable and collapsible mobile truck according to the present invention.

Figure 4 is an enlarged perspective view of the main operation state of the folding handle of the movable and expandable folding trolley according to the present invention.

Figure 5 is an enlarged perspective view of the main portion of the expansion pallet of the expandable and collapsible mobile truck according to the present invention.

Figure 6 is a side cross-sectional view of the use state of the expandable and collapsible mobile truck according to the present invention.

Figure 7 is a bottom perspective view of the expandable and collapsible mobile truck according to the present invention.

Figure 8 is an enlarged perspective view of the main portion of the folding expansion means of the expandable and foldable mobile trolley according to the present invention.

9 to 11 are perspective views showing the expansion order of the expandable and collapsible mobile truck according to the present invention.

12 to 14 is a perspective view showing a process of folding in a storage state of the expandable and foldable mobile cart according to the present invention.

15 is a side cross-sectional view showing another embodiment of the expandable and collapsible mobile truck according to the present invention.

* Description of the symbols in the drawings *

100: main body pallet 102: caster

104: engaging projection 106: the first caster groove

110: accommodating part 120: the first extension wire

200: folding handle 210: hinge pin

220: rotating bracket 230: antenna folding handle

300: extended pallet 302: caster

304: fixing protrusion 306: the second caster groove

320: second extension wire 400: folding expansion means

410: fixed hinge piece 420: swing hinge piece

422 guide bar 430 cylinder body

432 cylinder 440 piston head

500: torsion preventing means 502,502 ': fitting groove

310: departure preventing member 600: locking means

Claims (10)

It is formed in a rectangular plate shape and the object is loaded on the upper surface, a plurality of casters 102 are installed on the bottom to facilitate movement and direction change, and the main body pallet 100 and the locking protrusion 104 is symmetrically formed on one side of the left and right sides; ; A folding handle (200) provided to be foldable to one side of the main body pallet (100), the antenna handle being provided to be height-adjustable according to a user; It is formed in the shape of a square plate, located on the other side of the main body pallet 100, a plurality of casters 302 for movement and direction change and load support is installed on the bottom surface, the same as the locking projection 104 on the left and right sides An expansion pallet 300 having the fixing protrusions 304 symmetrically formed on the line; One side is coupled to the bottom of the other side of the main body pallet 100, the other side is coupled to the bottom of the expansion pallet 300, the expansion pallet 300 is extended to the other side of the main pallet (100), when the expansion pallet 300 is stored Folding and extending means (400) provided to be pivoted to the bottom of the main body pallet (100); The main pallet 100 is symmetrically provided on the left and right, and the extension pallet 300 is provided with a torsion preventing means 500 is provided to prevent the left and right twist from the main pallet 100; expandable and foldable Moving cart. The method of claim 1, The first caster is inserted into the bottom of the main pallet 100 so that the plurality of casters 304 of the bottom of the extended pallet 300 are inserted when the extended pallet 300 is pivoted and folded by the folding expansion means 400. Expandable and foldable mobile cart, characterized in that the insertion groove 106 is formed. The method of claim 1, When the expansion pallet 300 is folded and folded by the folding expansion means 400 on the side of the main body pallet 100, the expansion pallet 300 maintains the state of being superimposed with the main pallet 100 Expanding and collapsible mobile cart, characterized in that the locking means 600 is further formed so as to. The method of claim 1, Expandable and foldable mobile cart, characterized in that the receiving portion 110 is further formed on one side of the main body pallet (100). The method of claim 1, The first extension wire symmetrically formed to be able to draw in and out on the left and right sides of the main body pallet 100, and bent to a "b" shape to prevent the object from being separated from side to side when the main pallet 100 is placed on the upper surface Expandable and foldable mobile cart, characterized in that 120 is formed. The method of claim 1, The folding handle 200 and the hinge pin 210; A plurality of " ┗┛ " type rotation brackets 220 which are bolted symmetrically to one side of the upper surface of the main body pallet 100; The "형성된" -type pivot bracket 220 is hinged by a hinge pin 210, the left and right sides are formed in multiple stages to enable height adjustment "┏┓" antenna folding handle 230; characterized in that formed Expandable and collapsible trolleys. The method of claim 1, When the expansion pallet 300 is pivoted by the folding expansion means 400 on the bottom of the expansion pallet 300 and is folded on the bottom of the main pallet 100, a plurality of extension pallets provided on the bottom of the main pallet 100 are provided. And a second caster insertion groove 306 symmetrically formed on the bottom left and right sides of the main pallet side of the extended pallet 300 so that the caster 102 of the extended pallet 300 is inserted therein. The method of claim 1, The expansion pallet 300 is a departure prevention member 310 which is rotated 90 degrees to prevent the front departure of the object to one side of the upper surface; The second extension wire 320 is formed to be symmetrically formed to be able to draw in and out on the left and right sides, and bent to a “b” shape to prevent the object from being separated from side to side when the object is placed on the upper surface of the expansion pallet 300. Extendable and foldable mobile cart, characterized in that. The method of claim 1, The folding expansion means 400 is at least one fixed hinge piece 410 is coupled to the bottom surface of the main body pallet 100; At least one or more pivoting hinge pieces 420 that are pivotally coupled to the fixed hinge pieces 410 and have guide bars 422 elongated in the longitudinal direction; The guide bar 422 of the swing hinge piece 420 is provided with a cylinder 432 stepped to be slidingly coupled, at least one or more fixedly coupled to the bottom surface of the expansion pallet 300 facing the main pallet 100 A cylinder body 430; And a piston head 440 coupled to form an end at the end of the guide bar 422 such that the guide bar 422 slidingly coupled to the cylinder 432 is not separated from the cylinder 432. And folding trolleys. The method of claim 1, The torsion preventing means 500 is formed in a long bar (bar) shape, the main body of the pallet 100 is symmetrically coupled to the left and right sides, respectively, is axially coupled so as to pivot toward the expansion pallet 300, the center pivot Expansion and folding, characterized in that formed on the opposite side of the plurality of fitting grooves 502 to be fitted to the engaging protrusion 104 of the main body pallet 100 and the fixing protrusion 304 of the expansion pallet 300 is formed. Available balance.

Images