KR101793126B1 - Catable - Google Patents

Abstract

According to the present invention, a car table comprises: a seat portion including a flat plate-shaped table and an elastic string module which varies the length of an elastic string relative to the table; and a frame-shaped handle portion located at both side portions of the table on one side of the table and capable of rotating and moving up and down relative to the table; and a frame-shaped table moving portion located below the table on the other side of the table and rotatable relative to the table, wherein the seat portion, the handle portion, and the table moving portion can be mechanically deformed into a table shape or a carrier shape. As such, the car table is suitable for improving an eating environment.

Description

Car table {CATABLE}

The present invention can easily lift a heavy object at the time of camping or at a work site, and is easy to move a plurality of objects at once. When a plurality of objects are moved as needed, a car which minimizes the weight of the table Tables.

Recently, as interest in camping has increased, consumption of camping equipment has increased along with camping. Here, the camping refers to a leisure activity in which a person enjoys a temporary outdoor living while using a tent or temporary building outdoors from the house. These days, the camping goes further with glamping, which sends leisure activities in a facility with accommodation and cooking facilities.

However, since the camping is performed in an outdoor living of one night or more, a camping use such as a carrier, a chair, a simple dining table, a food material, an amusement facility, and a personal belonging article is required for the camping facility. The camping utensils are difficult to lift by themselves depending on the degree of weight, and repeatedly require moving the objects depending on the number of the camping utensils.

Thus, the camping utensil is transferred from the outside to the inside of the camping facility using a carrier, a chair, a kitchen table, and / or a person as a vehicle. On the other hand, the transportation means of the camping use product is disclosed in Korean Patent Laid-Open Publication No. 10-2009-0081519 as a prior art 1 (= carrier-type outdoor (picnic) table).

In the prior art 1, a load is stored in an internal space using an outdoor table reminiscent of a traveling carrier bag, and the load is carried by the wheels of the table. However, the prior art 1 can not reduce the storage space when the vehicle is loaded on the vehicle, thereby limiting the use of the vehicle space and placing the wheels around the table surface when used as a table.

In addition, the means for conveying the camping utensil has been disclosed in Korean Patent Laid-Open Publication No. 10-2014-0065758 as prior art 2 (= camping carrier). Here, the conventional art 2 uses a carrier for storing camping goods as a table at a camping site to facilitate transportation and storage of camping articles.

However, the conventional art 2 can not reduce the storage space when loaded on the vehicle, thereby limiting the use of the vehicle space and confining the storage space to a closed state, thereby limiting the shape and type of the object to be stored.

Korean Patent Publication No. 10-2009-0081519 Korean Patent Laid-Open Publication No. 10-2014-0065758

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems of the related art, and it is an object of the present invention to provide a vehicle cabin which does not have a limited storage space when loaded on a vehicle, The present invention has been made to provide a car table which is free from restrictions and has a good eating environment.

A car table according to the present invention includes: a seating part including a plate-shaped table and an elastic string module for varying the length of the elastic string relative to the table; A frame-shaped handle portion positioned at one side of the table on one side of the table and capable of rotating and moving up and down relative to the table; And a table-shaped table moving part which is located below the table on the other side of the table and is rotatable relative to the table, wherein the table-moving part, the handle part, Wherein the handle portion is positioned in an upright position relative to the table in the table shape or the carrier shape and the table moving portion is positioned in an upright position below the table in the table shape, And is supported on the seat portion and the table moving portion by being positioned in a lying state below the table in the carrier shape.

The table may be formed by coating a rectangular plate with melamine.

The table may be fixed to the handle portion through a table rotation shaft.

Wherein the table is located on the other side of the table below the table and along the width of the table, and has a "bracket" shape that is "tapered" toward the other side when viewed between the one side and the other side of the table .

The table bracket accommodates the table moving section under the table when the table moving section is folded toward the table, and can adjust the rotation of the table moving section when the table moving section is unfolded from the table.

Wherein the elastic string module comprises: a length adjuster installed on the table bracket at both sides of the table bracket; The elastic straps expandable and contractible from the length regulation; A hook-shaped connecting link located at the tip of the elastic string; And an elastic strap positioned on the end surface of the table at the one side of the table and extending from the other side of the table to the one side when an external force is applied to the elastic strap, And may include a fastening ring that is ring-engaged with the ring.

The length adjuster may include a rotation shaft and a coiled plate spring to connect the plate spring wound on the rotation shaft and connect the coiled plate spring or the rotation shaft to the elastic strap.

The handle portion includes: a handle-shaped handle having a flat shape and positioned below the table; First and second tubular handle columns extending from both sides of the handle support toward the both sides of the table; A first handle column and a second handle column, each of the first handle column and the second handle column supporting the table rotation axis, the first handle column and the second handle column, A second handle height fixture; A handle-column connecting rod having a tubular shape that can move up and down relative to the first and second handle pillars so that the first and second handle pillars are folded into the first and second handle pillars in a shape of '?' And a handle cover surrounding the handle post connecting block.

The first and second handle height fixing rods may include a plurality of fixing screws passing through an outer wall and an inner wall of the tube, and may be fixed to the first and second handle columns through a plurality of fixing screws, respectively.

The handle pillar connecting rod elastically ball-links with the end portion of the first handle column and the end portion of the second handle column through both ends in the '∩' shape, so that the end portion of the first handle column and the second And may be temporarily fixed to the end of the handle post 28.

The table moving unit may include: a table-shaped table base positioned below the table; A tubular table column rotatably fixed to the table through a central region of the '∩' shape while connecting both side portions of the table base to an ∩ 'shape; A table wheel inner rotating shaft extending horizontally from the area between the '∩' shaped diverging lines of the table column toward the table column and passing through the table column; A tubular table wheel outer rotating shaft which surrounds the table wheel inner rotating shaft and penetrates through the table column and is screwed with the table wheel inner rotating shaft through both ends; First to third wheels sequentially positioned at the central region of the '∩' shape of the table column and at both ends of the table wheel inner rotation axis; And a table wheel width adjuster located in a central region of the table wheel outer rotation axis and screwed to the table wheel inner rotation shaft via the table wheel outer rotation shaft.

The table wheel inner rotation shaft and the table wheel outer rotation shaft may be spaced apart from the table support by a predetermined distance from the table support so as to separate the first to third wheels.

Wherein the table wheel inner rotation shaft and the table wheel outer rotation shaft each comprise two parts, and the table wheel width adjuster is screwed with two table wheel inner rotation shafts, The inner rotation shaft may be horizontally moved in different directions and the two table wheel outer rotation shafts may be rotatably received through both sides to support the table wheel inner rotation shaft and the table wheel outer rotation shaft.

The first to third wheels may have the same diameter as the radius of the second wheel or the radius of the third wheel so as to horizontally support the table.

The present invention relates to a folding type folding type folding type folding type folding type folding type folding type folding type folding type folding type folding type folding type folding type folding type folding type folding type folding type folding type folding type folding type It does not have a limited storage space at the time of loading the vehicle, so that the use of the vehicle space is not restricted.

The present invention has a flat-shaped table and a frame-shaped handle portion and a table moving portion, so that the storage space is not limited to a closed space on the table and around the table, so that there is no restriction on the shape and kind of objects to be stored.

The present invention uses a frame-shaped handle and a table moving part together with a flat-shaped table to position the plurality of wheels under the table while mechanically shaping the carrier and the table, thereby improving the eating environment.

The present invention is characterized in that the table has a handle portion capable of varying the height with respect to the table on one side of the table and a table moving portion rotatable with respect to the table on the other side of the table, It ensures both mobility and stability of the table.

1 is a perspective view showing a table shape in a car table according to the present invention.
Fig. 2 is a schematic view partially showing the handle portion and the seat portion of Fig. 1;
Fig. 3 is a schematic view partially showing the handle portion, the table moving portion, and the seat portion of Fig. 1;
Fig. 4 is a perspective view showing a carrier shape in the car table of Fig. 1; Fig.
Figure 5 is a schematic view showing an elastic string module in the seat of Figure 1;
Figs. 6 to 8 are schematic views for explaining a method of using the car table of Fig. 1. Fig.

The following detailed description of the invention refers to the accompanying drawings, which illustrate, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with one embodiment. It is also to be understood that the position or arrangement of the individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is to be limited only by the appended claims, along with the full scope of equivalents to which such claims are entitled, if properly explained. In the drawings, like reference numerals refer to the same or similar functions throughout the several views, and length and area, thickness, and the like may be exaggerated for convenience.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily carry out the present invention.

1 is a perspective view showing a table shape in a car table according to the present invention. Fig. 2 is a schematic view partially showing the handle portion and the seat portion of Fig. 1, and Fig. 3 is a schematic view partially showing the handle portion, the table moving portion and the seat portion of Fig.

FIG. 4 is a perspective view showing a carrier shape in the car table of FIG. 1, and FIG. 5 is a schematic view showing an elastic string module in the seating portion of FIG.

1 to 5, a car table 170 according to the present invention includes a handle portion 50, a table moving portion 120, and a seating portion 160. The seating portion 160 includes a table 134 and an elastic string module 150. The table 134 has a flat plate shape, and is formed by coating a rectangular plate with melamine. The table 134 is rotatably fixed to the handle portion 50 through the table rotation shaft (132 in Fig. 2).

That is, the table 134 and the handle portion 50 are rotated relative to each other along the predetermined direction R 1 through the table rotation shaft 132. The table 134 is also located along the width of the table 134 below the table 134 at the other side of the table 134 and towards the other side as viewed between one side and the other side of the table 134 And a table bracket 138 having a " ┎ " shape.

The table bracket 138 receives the table moving part 120 under the table 134 when the table moving part 120 is folded toward the table 134 and moves the table moving part 120 to the table 134, the rotation of the table moving part 120 is adjusted. The elastic string module 150 varies the length of the elastic string 144 relative to the table 134.

The elastic string module 150 includes a length adjuster 142, an elastic string 144, a connecting loop 146, and a locking loop 148. The length adjuster 142 is embedded in the table bracket 138 on both sides of the table bracket 138. Here, the length adjuster 142 includes a rotation shaft (not shown in the figure) and a coiled plate spring (not shown in the figure) so as to connect the plate springs wound on the rotation shaft, To the string 144.

The rotation shaft can be elastically rotated by a coiled leaf spring. The elastic string 144 is wound on a rotation axis of the length adjuster 146 and is extendable or extendable from the length adjuster 146 along a predetermined direction (M33 in FIG. 5). The connection ring 146 is formed in a hook shape and is positioned at the tip of the elastic string 140.

The locking ring 148 is located on the end face of the table 134 on one side of the table 134 so that the locking ring 148 is pushed from one side of the table 134 to the other side And is connected to the linking ring 142 through an elastic string 140 extending toward the linking ring 142. The handle portion 50 is formed in a frame shape and is positioned on one side of the table 134 on both sides of the table 134 and is capable of rotating and moving up and down relative to the table 134.

More specifically, the handle portion 50 includes a handle support 10, first and second handle posts 24 and 28, first and second handle height supports 36 and 38, (44) and a handle cover (48). The handle base 10 has a flat shape and is positioned below the table 134. The first and second handle columns 24 and 28 are tubular and extend from both sides of the handle pedestal 10 toward both sides of the table 134.

The second handle height fixing rods 36 and 38 are disposed on the side of the table 134 to support the table rotating shaft 132 and surround the first handle pillar 24 and the second handle pillar 28, The first handle pillar 24 and the second handle pillar 28 are relatively movable up and down along a predetermined direction (M31 in Fig. 2).

The first and second handle height fixing rods 36 and 38 include a plurality of fixing screws 33 (shown in FIG. 2) passing through the outer and inner walls of the tube, To the first and second handle columns 24 and 28, respectively. The plurality of fixing screws 33 can move in a predetermined direction (M4 in FIG. 2).

The handle pillar connecting rod 44 is connected to the first and second handle pillar 24 and 28 so as to be folded into the first and second handle pillar 24 and 28 following the first and second handle pillar 24 and 28 ' 24, and 28 in a predetermined direction (M32 in FIG. 2).

Here, the handle post connecting rod 44 is elastically connected to the end of the first handle post 24 and the end of the second handle post 28 (not shown in the figure) And is temporarily fixed to the end of the first handle post 24 and the end of the second handle post 28. [

The handle cover (48) surrounds the handle post post (44). The table moving part 120 is formed in a frame shape and is located below the table 134 at the other side of the table 134 and is rotatable relative to the table 134. More specifically, the table moving unit 120 includes a table support 60, a table column 75, a table wheel inner rotation shaft 80, a table wheel outer rotation shaft 90, first to third wheels 103, 106, and 109, and a table wheel width adjuster 110.

The table pedestal 60 is formed in a flat shape and positioned below the table 134. The table pillars 75 are formed in a tubular shape and connect the table bracket 138 to the table 134 through a central region of the ∩ shape with the side portions of the table base 60 being connected in a ∩ shape, As shown in Fig.

The table wheel inner rotation axis 80 horizontally extends from the area between the ∩ shaped branch lines of the table column 75 toward the table column 75 and penetrates the table column 75. The table wheel outer rotary shaft 90 is tubular and passes through the table column 75 while surrounding the table wheel inner rotary shaft 80 and is screwed to the table wheel inner rotary shaft 80 through both ends.

The first to third wheels 103, 106, and 109 are sequentially positioned at the central region of the ∩ 'shape of the table pillar 75 and at both ends of the table wheel inner rotary shaft 80. The table wheel inner rotation shaft 80 and the table wheel outer rotation shaft 90 are separated from the table support 60 by a predetermined distance from the table support 60 so as to separate the first to third wheels 103, It is separated.

The first to third wheels 103, 106 and 109 are arranged to support the table 134 horizontally with respect to the plane of the drawing (not shown) by the radius of the first and second wheels 103, Or the radius of the third wheel (109). The first wheel 103 is rotated in a predetermined direction (R2 in Fig. 3) with respect to the table column 75. [ Further, the table column 75 is rotated in a predetermined direction (R3 in Fig. 3) with respect to the table.

The table wheel width adjuster 110 is located in the central region of the table wheel outer rotary shaft 90 and is screwed to the table wheel inner rotary shaft 80 through the table wheel outer rotary shaft 90. Here, each of the table wheel inner rotation axis 80 and the table wheel outer rotation axis 90 is composed of two parts.

The table wheel width adjuster 110 is screwed with two table wheel inner rotary shafts 80 to move the two table wheel inner rotary shafts 80 horizontally toward different directions M1 and M2, The rotary shaft 80 is received through both side portions to support the table wheel inner rotary shaft 80 and the table wheel outer rotary shaft 90.

The handle portion 50, the table moving portion 120, and the seating portion 160 may be mechanically deformed into a table shape of FIG. 1 or a carrier shape of FIG. The handle portion 50 is positioned as shown in Fig. 1 or Fig. 4 in an upright state with respect to the table in a table shape or a carrier shape.

The table moving part 120 is placed in an upright position under the table 134 in a table shape and supports the seating part 160 together with the handle part 50 and moves in a lying state under the table 134 in the carrier shape So as to support the handle portion 50 and the seat portion 160.

Figs. 6 to 8 are schematic views for explaining a method of using the car table of Fig. 1. Fig. In this case, Figs. 6 to 8 will be described with reference to Fig.

6, the table pillar 75 of the table moving part 120 is relatively rotated in a predetermined direction (R3 in Fig. 3) with respect to the table bracket 138 of the table 134 to rotate the table 134 As shown in Fig. The first to third wheels 103, 106 and 109 of the table moving part 120 are brought into contact with the ground surface (not shown in the figure) after the table column 75 is positioned below the table 134, (134) can be supported horizontally with respect to the ground.

Next, in the handle portion 50, the first and second handle height fixing rods 36 and 28 are fixed to the first and second handle columns 24 and 28 by a plurality of fixing screws (33 in Fig. 2) The first and second handle height fixing rods 36 and 28 are moved from the upper side to the lower side of the first and second handle columns 24 and 28 along a predetermined direction (M31 in FIG. 2) 28 relative to the first and second handle columns 24, 28, respectively.

When the first and second handle height fixtures 36 and 28 are positioned on the underside of the first and second handle columns 24 and 28, the first and second handle height fixtures 36 and 28 The table 134 is rotatably fixed to the table 134 via the table rotation shaft 132 so that the table 134 can be positioned below the first and second handle posts 24 and 28. [ Subsequently, in the handle portion 50, the handle post connecting rod 44 can be unfolded from the folded state to the first and second handle post 24, 28 in response to an external force.

The handle column connecting rod 44 is resiliently ball-engaged with the end of the first handle column 24 and the end of the second handle column 28 through both ends of the ∩ ' 24 and the end of the second handle post 28. As shown in Fig. The ball connection may be, for example, the engagement of the spring balls at both ends of the handle post linkage 44 in the groove of the end of the first handle post 24 and the groove of the end of the second handle post 28.

The table moving part 120 may detach the handle part 50 and the seating part 160 from the ground using the first to third wheels 103, The handle portion 50, the table moving portion 120, and the seating portion 16 may be mechanically coupled to each other to form a carrier. After the handle part 50, the table moving part 120 and the seating part 160 are coupled in a carrier shape, the handle part 50 is moved in a predetermined direction D of the seat portion 160. [0054]

7, before the seating part 160 is moved along the predetermined direction D, the seating part 160 loads the camping use material on the table 134 and, using the elastic string module, (134). ≪ / RTI > The camping utensil is made up of a plurality of articles, and the table 134 is formed in a flat plate shape, so that a large number of articles can be placed regardless of the type and shape of the articles.

The method of binding the camping article to the table 134 comprises applying an external force F to the elastic string module 150 and applying the external force F to the table 134 at the other side of the table 134, And the elastic cord 144 is pulled out of the length adjuster 142 through the connecting loop 146 in accordance with the direction of the external force F and the elastic force of the external force F The elastic strands 144 are stretched from the other side of the table 134 to the side of the table 134 by using the size and the direction so that the fixing rings 148 located on the end surface of the table 134 on one side of the table 134 And may include fastening the linkage ring 146.

8, the table pillar 75 of the table moving part 120 is relatively rotated along the predetermined direction R3 relative to the table bracket 138 of the table 134 to be unfolded from the table 134 have. After the table column 75 is held in an upright position below the table 134, the table column 75 is brought into contact with the ground using the table pedestal 60 at the lower side and the other side of the table can do.

The table pillar 75 may transmit the pressure P2 corresponding to a part of the total weight of the table 134 to the table pedestal 60 from the other side of the table 134. Next, in the handle portion 50, the first and second handle height fixing rods 36 and 28 are fixed to the first and second handle columns 24 and 28 by a plurality of fixing screws 33 The first and second handle height fixing legs 36 and 28 are moved in the predetermined direction M31 from the lower side to the upper side of the first and second handle columns 24 and 28, Can be moved relative to the second handle post (24, 28).

When the first and second handle height fixtures 36 and 28 are positioned on the upper side of the first and second handle columns 24 and 28, the first and second handle height fixtures 36 and 28 The table 134 is rotatably fixed to the table 134 via the table rotation shaft 132 so that the table 134 can be positioned on the upper side of the first and second handle posts 24 and 28. [ Subsequently, in the handle portion 50, the handle post connecting bar 44 can be folded from the unfolded state from the first and second handle post 24, 28 in response to an external force.

After the handlebar post 44 is folded on the first and second handle posts 24 and 28, the handle portion 50 is pushed by the handle pedestal 10 and the first and second handle posts 24 and 28, To support one side of the table 134. Here, the first and second handle columns 24, 28 can transmit a pressure P1 corresponding to the rest of the total weight of the table 134 to the handle pedestal 10 at one side of the table 134 .

The handle pedestal 10 can fix the table 134 together with the table pedestal 60 to the ground. The handle portion 50, the table moving portion 120, and the seating portion 160 may be mechanically coupled to each other to form a table.

10; A handle base, 24, 28; The first and second handle columns
36, 38; First and second handle height fixtures, 44; Handle Column Connections
48; Handle cover, 50; The handle portion
60; Table base, 75; Table pillars
80; Table wheel inner rotating shaft, 90; Table wheel outer rotation shaft
103, 106, 109; First to third wheels, 110; Table wheel width adjuster
120; A table moving unit 132; Table rotary shaft
134; Table, 138; Table bracket
142; A length adjuster, 144; Elastic line
146; Connecting ring, 148; Fastening ring
150; Elastic string module, 160; Seat

Claims (14)

A seating portion including a table-shaped table and an elastic string module for varying the length of the elastic string relative to the table;
A frame-shaped handle portion positioned at one side of the table on one side of the table and capable of rotating and moving up and down relative to the table; And
And a table-shaped table moving part positioned below the table on the other side of the table and rotatable relative to the table,
The seat portion, the handle portion and the table moving portion are mechanically deformable in a table shape or a carrier shape,
The handle portion is positioned in an upright position relative to the table in the table shape or the carrier shape,
Wherein the table moving part is positioned in an upright position below the table in the table shape and supports the seat part together with the handle part and is positioned in a lying state below the table in the carrier shape to support the seat part and the table moving part Wherein the car table comprises: The method according to claim 1,
Wherein the table is formed by coating a rectangular plate with melamine. The method according to claim 1,
Wherein the table is rotatably fixed to the handle portion via a table rotation shaft. The method according to claim 1,
Wherein the table is located on the other side of the table below the table and along the width of the table, and has a "bracket" shape that is "tapered" toward the other side when viewed between the one side and the other side of the table Included car table. 5. The method of claim 4,
Wherein the table bracket accommodates the table moving section under the table when the table moving section is folded toward the table and adjusts rotation of the table moving section when the table moving section is unfolded from the table table. 5. The method of claim 4,
The elastic string module comprises:
A length adjuster mounted on the table bracket at both sides of the table bracket;
The elastic straps expandable and contractible from the length regulation;
A hook-shaped connecting link located at the tip of the elastic string; And
Wherein said table is located at an end surface of said table at said one side of said table so that when an external force is applied to said elastic strands, said elastic straps extend from said other side of said table to said one side, A car table comprising a fastening ring to join the rings. The method according to claim 6,
Wherein the length adjuster has a rotation shaft and a coiled plate spring incorporated therein to connect the plate spring wound on the rotation axis and connect the coiled plate spring or the rotation axis to the elastic string. The method according to claim 1,
Wherein,
A flat-shaped handle support positioned under the table;
First and second tubular handle columns extending from both sides of the handle support toward the both sides of the table;
A first handle column and a second handle column, each of the first handle column and the second handle column supporting the table rotation axis, the first handle column and the second handle column, A second handle height fixture;
A handle-column connecting rod having a tubular shape that can move up and down relative to the first and second handle pillars so that the first and second handle pillars are folded into the first and second handle pillars in a shape of '?' And
And a handle cover surrounding the handle post connecting bar. 9. The method of claim 8,
Wherein the first and second handle height fixing rods are fixed to the first and second handle columns through a plurality of fixing screws each including a plurality of fixing screws passing through an outer wall and an inner wall of the tube, . 9. The method of claim 8,
The handle pillar connecting rod elastically ball-links with the end portion of the first handle column and the end portion of the second handle column through both ends in the '∩' shape, so that the end portion of the first handle column and the second Is temporarily fixed to the end of the handle post (28). The method according to claim 1,
Wherein the table moving unit comprises:
A table-shaped table having a flat shape positioned under the table;
A tubular table column rotatably fixed to the table through a central region of the '∩' shape while connecting both side portions of the table base to an ∩ 'shape;
A table wheel inner rotating shaft extending horizontally from the area between the '∩' shaped diverging lines of the table column toward the table column and passing through the table column;
A tubular table wheel outer rotating shaft which surrounds the table wheel inner rotating shaft and penetrates through the table column and is screwed with the table wheel inner rotating shaft through both ends;
First to third wheels sequentially positioned at the central region of the '∩' shape of the table column and at both ends of the table wheel inner rotation axis; And
And a table wheel width adjuster located in a central region of the table wheel outer rotation axis and screwed to the table wheel inner rotation shaft via the table wheel outer rotation shaft. 12. The method of claim 11,
Wherein the table wheel inner rotation shaft and the table wheel outer rotation shaft are spaced apart from the table support by a predetermined distance from the table support so as to separate the first to third wheels. 12. The method of claim 11,
The table wheel inner rotation axis and the table wheel outer rotation axis each comprise two parts,
The table wheel width adjuster is screwed with two table wheel inner rotation shafts to horizontally move the two table wheel inner rotation shafts in different directions through the two table wheel outer rotation shafts, So as to support the table wheel inner rotation shaft and the table wheel outer rotation shaft. 12. The method of claim 11,
Wherein the first to third wheels have a diameter equal to a radius of the second wheel or a radius of the third wheel so as to horizontally support the table.

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