JPH0880855A - Cage truck - Google Patents

Abstract

PURPOSE: To contrive the storage accommodation in a nesting state by engaging a pair of side frames in a U-figure shape for a fixed frame by a pair of stopper pieces and an engagement part for the used time, and engaging a pair of side frames by a pair of stopper pieces and an engagement part for the nonused time at a truncated chevron-shaped position, when a cage truck is not used, and inserting a supporting bar into the guide groove on a base plate. CONSTITUTION: When a cage truck is used, a pair of stopper pieces 21 are installed at each top end part of a pair of side frames 18, and the side frame 18 is shifted upwardly and turned, and then, the using engagement part 26 of a base plate 14 is engaged, and a fixed frame 7 and a pair of side frames 18 are arranged in a U-shape from. Further, when the cage truck is not used, the side frame 18 is shifted upwardly and turned, and the stopper piece 21 is engaged with the engagement for the base plate 14 in a nonused state, and a pair of side frames 18 are arranged in a truncated chevron. In this state, a pair of side frames 18 of an another cage truck allows a supporting bar 12 to intrude into the guide groove 17 of the base plate 14 which is fixed so as to pass through the inside of the fixed frame 7. Accordingly, the rear cage truck intrudes into the fixed frame 7 of the front cage truck and can be accommodated in a nesting state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cart that can be used as a storage rack for loading and transporting goods to a predetermined place in a supermarket or a distribution center, or for loading and storing goods.

[0002]

2. Description of the Related Art Conventionally, a basket cart of this type has a structure in which shelves can be detachably attached to both ends of a trolley body, or a shelf in which ledges can be attached to both ends of the trolley body. The board was detachably attached, and the side frame was detachably attached to one side of the trolley body.

[0003]

Although the conventional cart having detachable racks at both ends of the main body of the truck has a simple structure, both sides of the cart are open so that it is difficult to load luggage. It had to be sent, and there was the drawback that luggage loaded during transportation could easily fall out. In addition, the basket cart that detachably attaches the shelf frame and the side frame to both sides and one side of the cart body can easily load luggage, but when not in use, the shelf frame and the side frame can be removed from the cart body. If it is not removed and stored, a large storage space is required. Therefore, there is a disadvantage that a large storage space or a troublesome storage work such as attaching and detaching a shelf frame or a side frame is required.

In view of the above-mentioned conventional drawbacks, the present invention has been made.
You can easily load your luggage,
It is an object of the present invention to provide a basket cart that does not require attachment and detachment of a pair of side frames and can be stored and stored in a nesting state.

The above and other objects and novel characteristics of the present invention will become more fully apparent when the following description is read in view of the accompanying drawings. However, the drawings are for explanation only and do not limit the scope of the present invention.

[0006]

In order to achieve the above object, the present invention relates to a bogie frame formed in a trapezoidal contour shape in which a width dimension of an open side of a rear end is larger than that of a front end. , Four casters attached to both side portions and rear end portions of the front end of the bogie frame, and the lower end of the bogie frame fixed to the rear end of the bogie frame so as to project upward. Channel-shaped fixed frame,
A lower end of the fixed frame or a rear end of the bogie frame, the rear end of which is rotatably supported to cover the upper part of the bogie frame and a base plate having a width smaller than the width between the fixed frames; A pair of side frames having a height smaller than the height of the fixed frame, which is attached to both sides of the fixed frame via a fixture whose rear end is capable of vertically moving and rotating. With respect to the fixed frame, a pair of stopper pieces protruding downward at portions of the pair of side frames close to the tip end portions and the pair of side frames formed on both side portions of the base plate near the tip end portions with respect to the fixed frame are provided. Used locking portions that lock the pair of stopper pieces, respectively, so as to be positioned in a substantially right-angled direction, and the pair of stopper pieces at positions where the pair of side frames are in a V shape when not in use. The base plate to stop The formed unused locking portion, the guide groove formed so that the front end portion opens in the substantially central portion of the base plate, and the pair of side frames from the rear portion of the fixed frame are placed in the unused state. A pair of side frames of another basket cart constitutes a basket cart with a frame member having a support bar that is inserted into the guide groove of the base plate that is fixed so that it can pass through the fixed frame.

[0007]

When the basket cart constructed as described above is used, the stopper pieces attached to the distal end portions of the pair of side frames are rotated by moving the side frames upward to rotate the base plate. And the fixed frame and the pair of side frames are arranged in a U-shape. Further, when not in use, the side frames are moved upward and rotated, the stopper pieces are locked to the unused locking portions of the base plate, and the pair of side frames are arranged in a V shape. In this state, by pushing the front end of the rear cart to the rear end of the front cart, the rear plate of the rear cart rides on the front plate of the front cart, and The pair of side frames of the cart trolley enter into the fixed frame of the front cart trolley to enter the nesting state.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the embodiments shown in the drawings.

In the first embodiment of the present invention shown in FIGS. 1 to 11, 1 is formed into a nestable trapezoidal contour shape in which the width dimension on the open side of the rear end is larger than that on the front end. This is a trolley frame, and the trolley frame 1 is a trolley frame body 2 formed of a pipe material, and a caster mounting bar at the tip end of the trolley frame body 2 fixed to the tip end of the trolley frame body 2 by welding or the like so as to be located inside. 3 and a reinforcing bar 4 located at a portion higher than the height dimension of the front end portion of the bogie frame body 2 whose both ends are fixed so as to fix the rear end portions of the bogie frame body 2. ing.

Numerals 5, 5, 5, and 5 are casters attached to caster support bases 6, 6, 6, 6 which are fixed to both side portions of the front end and both side portions of the rear end of the bogie frame 1 by welding or the like.

Reference numeral 7 denotes a channel-shaped fixed frame whose lower end is fixed to the rear end of the bogie frame 1 by welding or the like so as to project upward. The fixed frame 7 has openings 8, 8 on both sides. And a channel-shaped frame bar 10 having openings 9 at its lower end, a shelf plate mounting bar 11 whose both ends are fixed to approximately the center of the frame bar 10, and approximately the center of the frame bar 10. A frame member 13 is fixed to a central portion of the reinforcing bar 4 of the bogie frame 1 which is projected downward and is composed of a support bar 12 fixed by welding or the like.

Numeral 14 is a width dimension smaller than the width dimension between the fixed frames 7 rotatably attached to the reinforcing bar 4 of the trolley frame 1 via the attachment fittings 15, 15 and the upper portion of the trolley frame 1 is A base plate made of a synthetic resin material having an arc-shaped tip corner portion for covering is formed with an inclined surface 16 capable of nesting on the lower surface of the base plate 14, and corresponds to the support bar 12 of the frame member 13. A guide groove 17 having a tip opening at substantially the center, and a stopper piece guide groove 17a formed in a V shape at upper surface portions on both sides.
17a is formed.

Reference numerals 18 and 18 denote opening portions on both sides of the fixed frame 7, which are attached to the fixed frame 7 at positions near both upper and lower portions thereof via rotatable and vertically movable attachments 19 and 19, respectively. A pair of side frames 8 and 8 are inserted into each other, and a pair of side frames 18 and 18 are supported at a substantially central portion of the pair of side frames 18 at positions on the same plane as the shelf mounting bar 11 of the frame member 13. The bars 20 and 20 are fixed, stopper pieces 21 and 21 projecting downward are fixed to the parts near the tip end, respectively, and the lower rear part is locked to a locking piece 22 fixed to the fixed frame 7. A stopper 25 having a locking portion 23 in a used state and a locking portion 24 in a non-used state is fixed.

Reference numerals 26 and 26 denote both ends of the base plate 14 which engage and lock the pair of side frames 18 and 18 with the stopper pieces 21 and 21 in a use state in which the pair of side frames 18 and 18 are substantially perpendicular to the fixed frame 7. With the use locking part formed in the part near the part,
The use locking portions 26, 26 are composed of a guide groove 27 and a locking hole 28 formed in the guide groove 27.

Numerals 29 and 29 are the stopper pieces 2 at the portions of the pair of side frames 18 and 18 which are in a V shape when not in use.
It is an unused locking portion formed on the upper surface of the base plate 14 that engages with and locks with Nos. 1 and 21.

Reference numeral 30 denotes a shelf plate mounting bar 11 of the frame member 13.
Is a shelf plate rotatably attached to the shelf frame via fittings 31, 31. The shelf plate 30 has a shelf body 32 having a width smaller than that of the fixed frame 7, and both ends of the shelf body 32. The pair of side frames 18 that are attached to and retractable from the
Locking tool 3 locked to 18 shelf support bars 20 and 20
3, 33, and a locking metal fitting 34 for locking the shelf main body 32 formed at the center of the tip of the shelf main body 32 so as to abut against the fixed frame 7.

In use, the basket cart 35 having the above-described structure is rotated by moving the pair of side frames 18 and 18 upward to lock the stopper pieces 21 and 21 to the use locking portions 26 and 26 of the base plate 14. At the same time, the locking piece 22 and the locking portion 23 of the stopper 25 are locked.

In this state, luggage is loaded on the base plate 14.
When the upper part of the loaded luggage is located near the attachment part of the shelf board 30, the locking metal fitting 34 is removed from the fixed frame 7 and pivoted forward to cause the locking tools 33, 33 at both ends to project outward, It is locked to the shelf support bars 20, 20 of the side frames 18, 18. In this state, luggage is loaded on the shelf board 30 for use.

When not in use, the shelf plate 30 is rotated upward to position the locking members 33, 33 in the stored state, and the locking members 34 are locked so as to contact the fixed frame 7.

Next, the pair of side frames 18, 18 are moved upward and rotated inward to lock the stopper pieces 21, 21 to the unused locking portions 29, 29, and the locking piece 22 and the stopper. The locking portion 24 of 25 is locked and positioned in a V shape.

In this state, the cart truck 35 located in front of
When the front end portion of the rear cart carriage 35 is pressed against the rear end portion, the base board 14 of the rear basket carriage 35 rides on the base board 14 of the front basket carriage 35.

At this time, the support bar 1 of the forward cart 35 is
2 enters into the guide groove 17 of the base plate 14 of the rear cart cart 35, and the lower end portions of the stopper pieces 21, 21 of the rear cart cart 35 are guide groove for the stopper piece of the base plate 14 of the front cart cart 35. 17a, 17a enter.
Further, the pair of side frames 18, 18 of the rear cart carriage 35 enter inside through the openings on both sides of the fixed frame 7 of the front cart carriage 35, and enter a nesting state.

[0023]

Different Embodiments of the Present Invention Next, different embodiments of the present invention shown in FIGS. 12 to 31 will be described. In the description of these different embodiments of the present invention, the same components as those of the first embodiment of the present invention will be designated by the same reference numerals and redundant description will be omitted.

The second embodiment of the present invention shown in FIGS. 12 to 14 is mainly different from the first embodiment of the present invention in that the pair of side frames 18 and 18 are molded with a synthetic resin material. The cover plates 36 and 36 are detachably attached, and the cover plates 37 and 37 formed of a synthetic resin material are also detachably attached to the frame member 13 of the fixed frame 7, respectively. Even with the dolly 35A, the same operational effects as those of the first embodiment of the present invention can be obtained.
By setting the vertical movement of the pair of side frames 18, 18 to be large, the stopper piece guide grooves 17a, 17a formed in the base plate 14 become unnecessary.

The third embodiment of the present invention shown in FIGS. 15 to 19 is mainly different from the first embodiment of the present invention in that a pair of side frames 18A, 18A can be rotated to a fixed frame 7A. And a pair of side frames 18A, 18
Stopper piece 2 protruding downward at a position near the tip of A
1A and 21A are attached to the guide cylinders 38 and 38 so as to be vertically movable, a frame member 13A using a reinforcing bar 39 so as to have a gap in the lower portion of the fixed frame 7A, and a guide groove 17
Even with the basket cart 35B configured as described above, the same advantageous effects as those of the first embodiment of the present invention can be obtained in that the base plate 14A without the above is used.

In the fourth embodiment of the present invention shown in FIGS. 20 to 25, the main difference from the first embodiment of the present invention is that the bogie frame 1 projects upward at both rear end portions. In addition to forming a channel-shaped fixed frame 7B in which the lattice frame 40 is attached to a portion other than the lower portion where the lower end portion is fixed, and a pair of through-hole-shaped locking portions 41, 41 at portions near both ends of the tip, A stopper 42 for collapsing the load at the rear end,
A base plate 14B on which 42 is formed, an upper end portion is an inclined surface 43,
The side frame locking mechanisms 44 and 44 are attached to the side frames 18B and 18B formed on the side wall 43 of the side frames 18B and 18B, respectively.
8B, guide cylinders 45, 4 fixed to a portion near the tip end
5 and 9 can be slid on this guide cylinder 45, 45
Locking rods 46, 46 protruding from the upper and lower ends of the guide cylinders 45, 45 mounted so as to be rotatable by 0 degrees, and the locking rods 4
L-shaped locking pieces 47, 47 that are locked to the locking portions 41, 41 of the base plates 14B, 14B fixed to the lower end portions of 6, 46 by welding or the like, and the locking bars 46, 46. While supporting the tip of the shelf frame 48 fixed by welding or the like to a portion near the upper part of the frame, the side frames 18B, 18B are rotated 90 degrees to be locked to the lattice frame 40 of the fixed frame 7B. The support pieces 49, 49 that can be supported, and the locking portions 50, 50 that lock the support pieces 49, 49 in the side frames 18B, 18B when the support pieces 49, 49 are not used. In point, the fixed frame 7 configured in this way
Even if the basket cart 35C is configured by using B, the base plate 14B, and the side frame locking mechanisms 44, 44, the same effect as that of the first embodiment of the present invention can be obtained.

A metal material is attached to the peripheral edges of the pair of through hole-shaped locking portions 41, 41 formed on the base plate 14B at positions near both ends of the base plate 14B to reinforce the pair of through holes. Stop 4
A reinforcing pipe made of metal is attached to the lower portion of the base plate 14B between the first and the left 41 to reinforce the base plate 14B, and a pair of through hole-shaped locking portions 41, 41 are formed by the reinforcing pipe made of metal. Of the base plate 14B and the pair of locking portions 41, 41 by covering the lower part of the base plate and forming recesses at the portions corresponding to the locking portions 41, 41 with which the front ends of the locking pieces 47, 47 are engaged. May be reinforced.

The fifth embodiment of the present invention shown in FIGS. 26 to 31 is mainly different from the fourth embodiment of the present invention in the side frame 18B having inclined surfaces 43, 43 formed on the upper end thereof.
18B and a pair of support columns 51, 51 whose lower end portions are fixed so as to project upward at both rear end portions of the bogie frame 1, and both end portions are fixed by welding or the like to substantially the center of the pair of support columns 51, 51. Fixed frame 7C including the bar member 52 and a pair of columns 51, 5 of the fixed frame 7C.
It can be used to cover the back surface as shown in FIG. 26 by locking the locking portions 53, 53 formed at the upper end portion of 1 and the portions of the pair of columns 51, 51 near the center portion. In terms of using a detachable rear frame 54 that can be suspended by locking pieces 55, 55 provided on the upper portion of the side frame 18B when not in use, as shown in FIG. With the thus configured basket cart 35D, luggage can be loaded and unloaded from the front and rear portions by attaching and detaching the rear frame 5.

[0029]

As is apparent from the above description, the following effects can be obtained in the present invention.

(1) A bogie frame formed in a trapezoidal contour shape in which a width dimension on the open side of the rear end portion is larger than that of the front end portion, a portion near both sides of the tip end portion of the bogie frame, and Four casters attached to a portion near the rear end, a channel-shaped fixed frame having a lower end fixed to the rear end of the bogie frame so as to project upward, and a lower end of the fixed frame or A base plate having a width smaller than the width between the fixed frames, which covers the upper portion of the bogie frame whose rear end is rotatably supported by the rear end of the bogie frame, and both side portions of the fixed frame. A pair of side frames having a height dimension smaller than the height dimension of the fixed frame mounted via a fixture whose rear end can be vertically moved and supported so as to be rotatable, and tips of the pair of side frames. It on the part of the side And a pair of stopper pieces projecting downwardly, and the pair of side frames formed on both side portions of the base plate near the tip end of the base plate so as to be positioned substantially at right angles to the fixed frame. Use locking portions that lock the stopper pieces, respectively, and a pair of side frames that are formed on the base plate so as to lock the pair of stopper pieces at positions where the pair of side frames are in a V shape when not in use. Used locking part,
A guide groove formed so that the front end portion opens in the substantially central portion of the base plate, and a pair of side frames of another basket cart in which the pair of side frames are positioned in the unused state from the rear portion of the fixed frame. Since it is composed of a frame member having a support bar that is fixed so as to be able to pass through the fixed frame so as to enter into the guide groove of the base plate, it is possible to load and use luggage as in a normal cart carriage. .

(2) According to the above (1), the nesting is performed by arranging the pair of side frames in a V-shape when not in use so that the front end of the rear cart is pushed in from the rear of the front cart. Can be stored in a state. Therefore, even if the storage space is small, many carts can be stored and stored.

(3) According to the above (1), when not in use, the pair of side frames need to be removed from the trolley frame simply by arranging the pair of side frames in a V-shape that can maintain a stable state with good weight balance. Since it is not present, storage and storage work is easy, and problems such as searching for side frames during use can be reliably eliminated.

(4) According to the above (1), it is easy to position the pair of side frames in the used state or the unused state, and anyone can easily perform the work in a short time.

(5) According to claim 2, the same effects as those of the above (1) to (4) can be obtained.

(6) Claims 3 and 4 are also the above (1) to (4).
It is possible to obtain the same effect as described above, and it is possible to easily set the side frame and the pair of side frames in a used or unused state.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a front view showing the first embodiment of the present invention.

FIG. 3 is a side view showing the first embodiment of the present invention.

FIG. 4 is a plan view showing a first embodiment of the present invention.

FIG. 5 is a bottom view showing the first embodiment of the present invention.

FIG. 6 is a central longitudinal sectional view of the first embodiment of the present invention.

FIG. 7 is a perspective view showing a fixture according to the first embodiment of the present invention.

FIG. 8 is a plan view showing the fixture of the first embodiment of the present invention.

FIG. 9 is an explanatory view showing a state in which the side frame of the first embodiment of the present invention is located above.

FIG. 10 is a plan view showing an operating state of the side frame according to the first embodiment of the present invention.

FIG. 11 is an explanatory diagram of a nesting state according to the first embodiment of this invention.

FIG. 12 is a perspective view showing a second embodiment of the present invention.

FIG. 13 is a front view showing a second embodiment of the present invention.

FIG. 14 is a side view showing the second embodiment of the present invention.

FIG. 15 is a front view showing a third embodiment of the present invention.

FIG. 16 is a side view showing a third embodiment of the present invention.

FIG. 17 is a plan view showing a third embodiment of the present invention.

FIG. 18 is a plan view showing the operating state of the side frame of the third embodiment of the present invention.

FIG. 19 is an explanatory diagram of a nesting state according to the third embodiment of this invention.

FIG. 20 is a perspective view showing a fourth embodiment of the present invention.

FIG. 21 is a front view showing a fourth embodiment of the present invention.

FIG. 22 is a side view showing a storage state of a shelf frame according to the fourth embodiment of the present invention.

FIG. 23 is a side view showing the fourth embodiment of the present invention.

FIG. 24 is a partially cutaway plan view showing a fourth embodiment of the present invention.

FIG. 25 is a bottom view showing the fourth embodiment of the present invention.

FIG. 26 is a front view showing a fifth embodiment of the present invention.

FIG. 27 is a side view showing the fifth embodiment of the present invention.

FIG. 28 is a side view showing the storage state of the shelf frame according to the fifth embodiment of the present invention.

FIG. 29 is a plan view showing a shelf frame storage state of the fifth embodiment of the present invention.

FIG. 30 is a plan view showing a fifth embodiment of the present invention.

FIG. 31 is an explanatory diagram of a housed state of the back frame according to the fifth embodiment of the present invention.

[Explanation of symbols]

 1: Bogie frame, 2: Bogie frame main body, 3: Castor mounting bar, 4: Reinforcing bar, 5: Castor, 6: Castor, 7, 7A, 7B, 7C: Fixed frame, 8: Opening part, 9: Opening part , 10: frame bar, 11: shelf plate mounting bar, 12: support bar, 13, 13A: frame material, 14, 14A, 14B: base plate, 15: mounting bracket, 16: inclined surface, 17: guide groove, 18 , 18A, 18B: Side frame, 19: Fixture, 20: Shelf board support bar, 21, 21A: Stopper piece, 22: Locking piece, 23: Locking part, 24: Locking part, 25: Stopper, 26 : Used locking part, 27: Guide groove, 28: Locking hole, 29: Unused locking part, 30: Shelf plate, 31: Mounting bracket, 32: Shelf plate body, 33: Locking tool, 34: Engagement Stopper, 35, 35A, 35B, 35C 35D: Basket cart, 36: Cover plate, 37: Cover plate, 38: Guide tube, 39: Reinforcing bar, 40: Lattice frame, 41: Locking part, 42: Stopper, 43: Inclined surface, 44: Side frame member Stopping mechanism, 45: Guide cylinder, 46: Locking bar, 47: Locking piece, 48: Shelf frame, 49: Supporting piece, 50: Locking part, 51: Strut, 52: Bar member, 53: Locking part , 54: rear frame, 55: locking piece.

Claims (5)

[Claims] 1. A bogie frame formed in a trapezoidal contour shape in which a width dimension of an open side of a rear end portion is larger than that of a front end portion, a portion near both end portions of the front end portion of the bogie frame, and a rear portion. Four casters attached to a portion near the end, a channel-shaped fixed frame having a lower end fixed to the rear end of the bogie frame so as to project upward, and a lower end of the fixed frame or the above-mentioned fixed frame. A base plate having a rear end rotatably pivotably supported on the rear end of the bogie frame and covering the upper portion of the bogie frame, the base plate having a width smaller than the width between the fixed frames, and rear portions on both sides of the fixed frame. A pair of side frames having a height dimension smaller than the height dimension of the fixed frame attached via a fixture whose end portions can be vertically moved and rotatably supported, and tip portions of the pair of side frames. Below each part The pair of stopper pieces protruding in one direction, and the pair of stoppers so that the pair of side frames formed on both sides of the base plate near the tip end portion thereof are positioned substantially at right angles to the fixed frame. An unused locking part that locks each of the pieces, and an unused part formed on the base plate so that the pair of side frames are respectively locked with the pair of stopper pieces at a position where the pair of side frames are in a V shape when not in use. An engaging portion, a guide groove formed so that a front end portion is opened at a substantially central portion of the base plate, and another basket cart having a pair of side frames positioned in a non-use state from a rear portion of the fixed frame. A basket cart, wherein a pair of side frames comprises a frame member having a support bar that is inserted into a guide groove of the base plate fixed so as to be able to pass through the fixed frame. 2. A bogie frame formed in a trapezoidal contour shape in which a width dimension of a rear end portion on the open side is larger than that on a front end portion, and parts and rear portions of the front end portion of the bogie frame near both sides. Four casters attached to a portion near the end, a channel-shaped fixed frame having a lower end fixed to the rear end of the bogie frame so as to project upward, and a lower end of the fixed frame or the above-mentioned fixed frame. A base plate having a rear end rotatably pivotably supported on the rear end of the bogie frame and covering the upper portion of the bogie frame, the base plate having a width smaller than the width between the fixed frames, and rear portions on both sides of the fixed frame. A pair of side frames whose height is smaller than the height of the fixed frame whose ends are rotatably supported, and the pair of side frames project downward downward at the end portions of the pair of side frames and can move up and down. Pair of stoppers attached to -A piece and a user-member for locking the pair of stopper pieces so that the pair of side frames formed on both sides of the base plate near the tip end of the base plate are positioned substantially at right angles to the fixed frame. A stop part, an unused locking part formed on the base plate so as to respectively lock with the pair of stopper pieces at a position where the side frame is in a V shape when not in use, and a rear part on the fixed frame. And a pair of side frames of another basket trolley in which the pair of side frames are in a non-use state are provided with a material fixed so as to be able to pass through the fixed frame. 3. A bogie frame formed in a trapezoidal contour shape in which a width dimension of an open side of a rear end portion is larger than that of a front end portion, and portions and rear portions of the front end portion of the bogie frame near both sides. Four casters attached to a portion near the end, a channel-shaped fixed frame having a lower end fixed to the rear end of the bogie frame so as to project upward, and a lower end of the fixed frame or the above-mentioned fixed frame. A base plate having a width smaller than the width between the fixed frames that covers the upper portion of the bogie frame whose rear end is rotatably supported by the rear end of the bogie frame, and A pair of locking parts formed on the parts, a pair of side frames whose rear ends are rotatably supported on both sides of the fixed frame, and a pair of side frames that are vertically movable on the parts near the tip parts. The lower end part that is movably mounted is engaged with the locking part. A pair of locking rods having locking pieces to be stopped, a shelf frame having a rear end rotatably attached to the substantially central portion of the fixed frame, and a portion of the pair of locking rods near the tip portions. And a pair of support pieces capable of supporting the parts of the shelf frame, which are respectively fixed to the shelf frame, close to the tip end portion thereof, and that can be locked to the shelf frame so as to hold the housed state of the side frame. A cart cart characterized by that. 4. A bogie frame formed in a trapezoidal contour shape in which a width dimension of an open side of the rear end is larger than that of the front end, and a portion of the bogie frame near both sides of the front end and a rear portion of the bogie frame. Four casters attached to the parts near the ends, a pair of columns whose bottom ends are fixed to the rear ends of the bogie frames so as to project upward, and both ends at approximately the center of the pair of columns. A support frame having a fixed support bar and a lower end of a pair of columns of the fixed frame or an upper part of the bogie frame whose rear end is rotatably supported at the rear end of the bogie frame. A base plate having a width smaller than the width between the pair of columns of the fixed frame to be covered, a pair of locking portions formed at positions near both ends of the base plate, and a pair of columns of the fixed frame. A pair of pivotally supported ends The side frames, a pair of locking bars having locking pieces that are locked to the locking portions at lower end portions that are vertically movably attached to portions of the pair of side frames near the tip portions, and the fixed frame. It is possible to support a shelf frame whose rear end is rotatably attached to the support bar and a part of the shelf frame that is fixed to the parts of the pair of locking bars near the tip ends of the shelf frame. A cart cart characterized by being provided with a pair of support pieces that can be locked to the shelf frame that is rotated upward so as to hold the storage state of the shelf frame. 5. A bogie frame formed in a trapezoidal contour shape in which a width dimension of an open side of a rear end is larger than that of a front end, and a portion of the bogie frame near both ends and a rear portion of the front end of the bogie frame. Four casters attached to the parts near the ends, a pair of columns whose bottom ends are fixed to the rear ends of the bogie frames so as to project upward, and both ends at approximately the center of the pair of columns. A support frame having a fixed support bar and a lower end of a pair of columns of the fixed frame or an upper part of the bogie frame whose rear end is rotatably supported at the rear end of the bogie frame. A base plate having a width smaller than the width between the pair of columns of the fixed frame to be covered, a pair of locking portions formed at positions near both ends of the base plate, and a pair of columns of the fixed frame. A pair of pivotally supported ends The side frames, a pair of locking bars having locking pieces that are locked to the locking portions at lower end portions that are vertically movably attached to portions of the pair of side frames near the tip portions, and the fixed frame. It is possible to support a shelf frame whose rear end is rotatably attached to the support bar and a part of the shelf frame that is fixed to the parts of the pair of locking bars near the tip ends of the shelf frame. In addition, a pair of support pieces that can be locked to the shelf frame that is rotated upward so as to hold the storage state of the shelf frame and a pair of support columns of the fixed frame are detachably locked. And a rear frame that can be locked to the side frame when not in use.