Cart with box

Abstract

To provide a carriage with a box enabling forming a box body for storing therein goods to be carried.SOLUTION: A carriage with a box includes: a carriage 1 provided with a rack frame 2; and a panel structure 12 configured to be formed with a box body on the carriage. The rack frame 2 has a storage chamber 9 formed therein. The panel structure 12 is configured to be: freely changeable in a shape between a solid shape P in which panels are deployed to form a cross-section into a rectangular shape, and a flat shape Q in which panels are folded so as to be laid over on each other. Such a panel structure is configured to form a box body 11a with an upper portion opened and to be placed on the rack frame 2 when standing upright as the solid shape P; and stored in the storage space 9 when laid down sideways as in the flat shape Q.SELECTED DRAWING: Figure 11

Description

Technical Field

[0001] The present invention relates to a cart with a box for transportation, and relates to a cart provided with a box body for accommodating transported goods.

Background Art

[0002] Carts for transportation are provided in various forms. For example, in order to prevent the loaded goods from collapsing or to protect the goods from the outside, etc., a cart with a box that can accommodate the transported goods is provided.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] For example, the cart proposed in Patent Document 1 is configured such that a plurality of panels are provided between the left and right side frames erected on the cart, and a box is formed by expanding the panels in a state of straddling between the side frames, and the panels can be folded by overlapping them on the side frames. It is described that a plurality of carts can be nested in the folded state.

[0005] However, the folding of the panel is for the purpose of nesting the cart, and the side frames are always erected on the cart, and the folded panels are also erected from the cart in a state of being overlapped on the side frames. Therefore, it does not enable a compact folded state.

[0006] The present invention aims to provide a trolley with a box that is fundamentally different from trolleys such as those described in Patent Document 1. The box is provided by raising the unfolded three-dimensional panels and placing them on the trolley frame, while a flat body is formed by folding the panels to a flattened shape, and this flat body can be stored in the tray chamber formed by the frame by tilting and rotating it on its side. [Means for solving the problem]

[0007] Therefore, the means configured in the present invention consists of a trolley with a frame and a panel structure for forming a box on the trolley, the frame is composed of a pair of opposing front and rear baseboards and a left and right baseboard, forming a rectangular frame in plan view, and a storage chamber is formed inside the frame, the panel structure is composed of a pair of opposing front and rear panels and a left and right panel, and the shape can be freely changed between a three-dimensional form in which the panels are unfolded so that the cross-section of the panel structure is rectangular and a flattened form in which the panels are folded so that they overlap each other, when the panel structure is upright in three-dimensional form a box with an open top is formed and is configured to be placed on the frame, and when the panel structure is laid on its side in flattened form it is configured to be stored in the storage chamber.

[0008] At this time, in a preferred embodiment of the present invention, the front panel, rear panel, left panel, and right panel constituting the panel assembly are pivotally coupled to each other at their side edges so as to be rotatable, and the left panel and right panel are configured to be foldable in half toward the space between the front panel and the rear panel. The front panel and the rear panel are overlapped with each other with the folded left panel and right panel sandwiched therebetween to form the flat form, and the left panel and right panel are extended from the half-folded state to separate the front panel and the rear panel to form the three-dimensional form. The rear panel is pivotally coupled to the upper end of the rear cross member of the frame via pivoting means so as to be rotatable about a horizontal axis. The pivoting means is configured such that when the rear panel is rotated upright, the lower end surface of the rear panel is placed on the upper surface of the rear cross member, and when the rear panel is rotated horizontally, the rear panel faces the inside of the storage chamber.

[0009] Preferably, with respect to the X direction and Y direction orthogonal to each other on a plane, the frame is formed into a rectangular frame by a front cross member and a rear cross member extending in the X direction and a left cross member and a right cross member extending in the Y direction. Inside each cross member having a predetermined thickness dimension (T), the X-direction dimension (LX) and Y-direction dimension (LY) of the storage chamber are defined. When the panel assembly is in the flat form, a flat body is formed, and the outer shape of the flat body in the horizontal state is configured such that the X-direction dimension (WX) and Y-direction dimension (WY) satisfy WX < LX and WY < LY so as to be stored in the storage chamber. When the panel assembly is erected in the three-dimensional form, a box body is formed, and the outer shape of the box body in the erected state has the left panel and the right panel protruding outward from both the left and right side edges of the front panel and the rear panel. By configuring the outer dimension (EX) of the interval between the left panel and the right panel in the X direction and the outer dimension (EY) of the interval between the front panel and the rear panel in the Y direction such that LX < EX and LY < EY, the lower end surface of the panel forming the box body is configured to be placed on the upper end surface of the frame.

[0010] In an embodiment of the present invention, a flat body formed from flattened panel components is raised from a state stored in a storage chamber by rotating it via the pivot means, and the left and right panels are extended from a half-folded state relative to the rear panel, and the front panel is moved forward toward the front baseboard to unfold it into a three-dimensional shape. In this configuration, a guide rail extending in the direction of forward movement of the front panel is provided at the bottom of the storage chamber, and an engagement means is provided at the lower end of the front panel. With the flat body tilted forward toward the front baseboard around the pivot means, the front panel is moved forward by sliding the engagement means while engaged with the guide rail.

[0011] The engagement means preferably has a locking piece that extends vertically from the outer surface of the front panel beyond its lower end, and when the box formed by standing up the three-dimensional panel structure is placed on the frame, the locking piece is preferably configured to lock onto the outer surface of the front baseboard.

[0012] A partition plate can be provided to divide the inside of the box-shaped structure formed on the trolley. The partition plate has both sides attached to the front and rear panels, and is provided with fixing means at its lower end that engage with and secure to the guide rail. [Effects of the Invention]

[0013] The present invention provides a frame 2 on a trolley 1, and a panel structure 12 that can change shape between a three-dimensional shape P and a flattened shape Q. In this case, the panel structure 12 can stand upright in the three-dimensional shape Q and be placed on the frame 2 to provide a box 11a for storing transported goods. When laid on its side in the flattened shape Q, it can be compactly stored in a storage compartment 9 inside the frame 2. [Brief explanation of the drawing]

[0014] [Figure 1]The diagram shows the operation of a box-type trolley according to an embodiment of the present invention. (A) is a perspective view showing a flattened panel structure stored in a storage compartment of the frame. (B) is a perspective view showing the flattened panel structure standing upright and unfolded in a forward-leaning position. (C) is a perspective view showing a box formed by placing the panel structure in a three-dimensional shape on the frame. (D) is a perspective view showing the upper opening of the box covered with a lid panel. [Figure 2] With respect to embodiments of the present invention, (A) is a perspective view showing a trolley in which the flattened panel structure is stored in the storage chamber of the frame, (B) is a cross-sectional view along line AA, and (C) is a cross-sectional view along line BB. [Figure 3] The panel structure and the bogie are shown separated; (A) is a cross-sectional view of the flattened body formed by making the panel structure flattened, and (B) is a cross-sectional view of the bogie. [Figure 4] The diagrams illustrate the process of changing the shape of the panel structure. (A) is a cross-sectional view showing the front panel being moved forward while extending the front and left panels from a half-folded state to a three-dimensional shape, (B) is a cross-sectional view showing the three-dimensional shape, and (C) is a cross-sectional view partially showing the movement of the left and front panels during the shape change. [Figure 5] The diagram shows the pivoting mechanism between the rear panel in the panel structure and the rear baseboard in the frame. (A) is an enlarged cross-sectional view partially showing the state before pivoting, and (B) is a cross-sectional view showing the state after pivoting. [Figure 6] Regarding the process of changing shape from a flattened form to a three-dimensional form, the flattened panel structure is shown in a state where it has been lifted from the frame; (A) is a perspective view and (B) is a cross-sectional view. [Figure 7] This shows the state when the panel structure, which has been lifted from the frame, is in a forward-tilting position and unfolded. (A) is a perspective view showing the whole, and (B) is an enlarged view of the part indicated by the symbol S1. [Figure 8]Regarding the operation during deployment, (A) is a cross-sectional view showing the flat body of the panel structure being lifted from the frame, and (B) is a cross-sectional view showing the state during deployment. [Figure 9] It shows the state where a box body is formed by placing a panel structure in a three-dimensional form on the frame. (A) is a perspective view showing the whole, (B) is an enlarged view of the part indicated by reference sign S2, (C) is an enlarged view of the part indicated by reference sign S3, and (D) is an enlarged view of the part indicated by reference sign S4. [Figure 10] It is a cross-sectional view of the cart shown in Fig. 9(A). [Figure 11] It is a perspective view showing the state when covering the upper opening of the box body with a lid panel. [Figure 12] It is a cross-sectional view of the cart shown in Fig. 11. [Figure 13] It shows the state where the upper opening of the box body is covered with a lid panel. (A) is a perspective view showing the whole, and (B) is an enlarged view of the part indicated by reference sign S5. [Figure 14] It is a perspective view showing a partition plate for partitioning the inside of the box body. [Figure 15] Regarding the structure of the partition plate, (A) is a cross-sectional view taken along the line C-C of Fig. 14, and (B) is an enlarged view of the part indicated by reference sign S6.

Mode for Carrying Out the Invention

[0015] The preferred embodiments of the present invention will be described in detail below based on the drawings.

[0016] As shown in Figs. 1 to 5, the cart is a pallet cart provided with casters 3 on the lower side of a frame 2 composed of a frame body having a rectangular shape in plan view, and provided with seated columns 4 for stacking at the four corners, and provided with a panel structure 12 for forming a box body 11a on the cart 1.

[0017] (Frame) The frame 2 is composed of a pair of opposing front toe boards 5A and rear toe boards 5B, and a left toe board 5L and a right toe board 5R. In the illustrated embodiment, with respect to the orthogonal X and Y directions on a plane (see Figure 2(A)), the frame 2 is a rectangular frame with the X direction as the long side and the Y direction as the short side, with the front toe boards 5A and rear toe boards 5B forming the long side and the left toe board 5L and right toe board 5R forming the short side, and the edges of adjacent toe boards at the four corners are connected by connecting members 6. In this case, the connecting member 6 has a cylindrical portion through which the seated support column 4 is inserted and held.

[0018] In this regard, although the specification and drawings describe the frame 2 as rectangular in the embodiment, it is not limited to this and may be square. Furthermore, since the trolley 1 can move in all directions (forward, backward, left, and right) and is not based on any particular direction, please understand that the terms "front," "rear," "left," and "right" are used for the convenience of understanding when referring to the drawings and do not have any special meaning.

[0019] As shown in Figure 3(B), horizontal crossbar frames 7 extending in the Y direction are installed between the front baseboard 5A and the rear baseboard 5B. Multiple horizontal crossbar frames 7 are arranged at intervals in the X direction, and a base plate 8 for placing cargo is provided between adjacent horizontal crossbar frames 7, 7.

[0020] In the illustrated embodiment, the horizontal frame 7 is formed from a cross-shaped profile with a hollow cross-section, as shown in the enlarged view of arrow E2 in Figure 3. The horizontally protruding portion supports the substrate 8, and the upper part of the vertically protruding portion protrudes upward from the substrate 8, as indicated by the height H, thereby forming a guide rail 7a that extends in the Y direction.

[0021] A storage chamber 9 is formed inside the frame 2 that constitutes this frame. The storage chamber 9 is divided into a shallow rectangular chamber with the horizontal bar frame 7 and the base plate 8 as its bottom, and is enclosed by a front baseboard 5A and a rear baseboard 5B, and a left baseboard 5L and a right baseboard 5R, which have a predetermined thickness T, and has a long side dimension LX in the X direction and a short side dimension LY in the Y direction (see Figures 2(B) and 2(C)).

[0022] (Panel structure) The panel structure 12 is composed of a pair of opposing front panels 13A and rear panels 13B, a left panel 13L, and a right panel 13R. The structure is configured to allow the shape to be freely changed between a three-dimensional form P (see Figure 1(C)) in which the panels are unfolded so that the cross-section of the panel structure 12 is rectangular, and a flattened form Q (see Figure 1(A)) in which the panels are folded so that they overlap each other.

[0023] A pair of front panels 13A and rear panels 13B, and a pair of left panels 13L and right panels 13R are each formed to be the same shape and size. With the left panel 13L and right panel 13R interposed between the front panel 13A and rear panel 13B, the adjacent side edges are pivotally connected to each other via pivot means 14 (see Figure 4).

[0024] In this configuration, the left panel 13L and the right panel 13R are configured to be foldable in half toward the space between the front panel 13A and the rear panel 13B. The flattened shape Q is achieved by overlapping the front panel 13A and the rear panel 13B with the folded left panel 13L and the right panel 13R in between. The three-dimensional shape P is achieved by extending the left panel 13L and the right panel 13R from their folded state to separate the front panel 13A and the rear panel 13B.

[0025] In the illustrated embodiment, the left panel 13L and the right panel 13R are each divided into two parts, and the two small panels are pivotally connected by a pivoting means 15 (see Figure 4) so ​​as to be foldable in half. As shown in Figure 4(B), when extended from the folded state, the two small panels are aligned on the same straight line. However, in addition to this configuration, for example, when the panels are made of synthetic resin, they may be configured to be foldable in half by integrally molded thin hinges or the like.

[0026] Incidentally, the pivot means 14 located at the four corners of the panel structure 12 are arranged as shown in the enlarged view of arrow E1 in Figure 3. That is, when the structure is in a flattened form Q, the right panel 13R and the front panel 13A, which are superimposed on each other, are configured such that the edge surface 13f of the right panel 13R is positioned inward from the edge surface 13g of the front panel 13A, and the vicinity of the edge surface 13g of the right panel 1R (in the illustrated example, the corner with the side surface) is pivotally connected to the inner surface of the front panel 13A. When the structure is rotated from this state to a three-dimensional form P, the edge surface 13f of the right panel 13R is configured such that the surface near the pivot means 14 abuts against the inner surface of the front panel 13A, and the surface away from the pivot means 14 extends to the position indicated by the symbol J. Enlarged views of the other pivot means 14 are omitted, but all of the pivot means 14 at the four corners have a similar configuration.

[0027] Therefore, when the panel structure 12 changes shape from a flattened form Q to a three-dimensional form P, it is configured such that, in terms of external dimensions, not only does the dimension in the Y direction increase, but the dimension in the X direction also increases, as indicated by the symbol J.

[0028] The flat body 11b formed by setting the panel structure 12 in the flat form Q has an outer shape determined by the panel contour shapes of the front panel 13A and the rear panel 13B as shown in FIGS. 2(B) and (C). The sizes in the X direction and Y direction of the flat body 11b when in the lying-down state are defined by the longitudinal dimension WX and the short-side dimension WY, respectively. And it is configured such that WX < LX and WY < LY with respect to the longitudinal side dimension LX in the X direction and the short-side dimension LY in the Y direction of the above-described storage chamber 9. Thereby, the flat body 11b can be stored in the storage chamber 9.

[0029] On the other hand, as shown in FIGS. 4(A) and (B), when the panel structure 12 is changed from the flat form Q to the three-dimensional form P, as described above, the left panel 13L and the right panel 13R project outward from the left and right side edges of the front panel 13A and the rear panel 13B. Therefore, the outer dimension EX of the distance between the left panel 13L and the right panel 13R is larger than the longitudinal dimension WX of the above-described flat body 11b and also larger than the longitudinal side dimension LX of the storage chamber 9. That is, a form in which LX < EX is formed. Thereby, when the box body 11a is formed by standing up the panel structure 12 in the three-dimensional form P, the left panel 13L and the right panel 13R of the box body 11a can be placed on the upper surfaces of the left side rail 5L and the right side rail 5R of the frame frame 2 having the thickness dimension T.

[0030] At this time, the outer dimension EY of the distance between the front panel 13A and the rear panel 13B separated and expanded by the left panel 13L and the right panel 13R is configured to be larger than the short-side dimension WY when the above-described flat body 11b is formed and also larger than the short-side dimension LY of the storage chamber 9. In other words, the left panel 13L and the right panel 13R are sized such that when extended from the half-folded state, the outer dimension EY is formed. Thereby, since LY < EY for the front panel 13A and the rear panel 13B of the box body 11a, it is possible to place them on the upper surfaces of the front side rail 5A and the rear rail 5B of the frame frame 2 having the thickness dimension T.

[0031] The box body 11a, which is placed on the frame 2, has a base plate 8 (including the horizontal frame 7) as its bottom and an opening at the top, thereby providing a storage compartment for transported items on the trolley 1. In this case, it is preferable to provide a lid panel 16 that can open and close the upper opening of the box body 11a, as shown in the figure. The lid panel 16 is pivotally connected to the upper edge of the rear panel 13B via a pivoting means 17 (see Figures 9 to 13), and when the upper opening of the box body 11a is opened, it is superimposed on the rear panel 13B.

[0032] As shown in Figure 5, the panel structure 12, configured as described above, is in a flattened form Q, and the rear panel 13B is pivotally connected to the upper end of the rear baseboard 5B of the frame 7 via a pivoting mechanism 18 for raising and lowering, allowing it to rotate freely around a horizontal axis. The pivoting mechanism 18 for raising and lowering is configured such that when the rear panel 13B is rotated upright, the lower end surface of the rear panel 13B rests on the upper surface of the rear baseboard 5B, and when the rear panel 13B is rotated sideways, the rear panel 13B faces into the interior of the storage compartment 9.

[0033] (action) The operation of the above embodiment will be explained below.

[0034] (Storage state) Figure 1(A) shows the trolley 1 in its unused state, where the panel assembly 12 is laid on its side via the pivot means 18 for tilting in a flattened form Q, and is stored in the storage chamber 9 formed by the frame 2. In the illustrated embodiment, as shown in Figures 2 and 5(B), only the overlapping front panel 13A, left panel 13L, and right panel 13R are stored in the storage chamber 9, while the rear panel 13B and lid panel 16 are not stored and are exposed above. However, it may be configured so that the entire assembly can be stored. Since the trolley 1 with the panel assembly 12 in the flattened form Q is folded compactly, multiple trolleys can be stored stacked on top of each other via the seated support columns 4. It can also be used as a flatbed trolley by loading the transported goods onto the top lid panel 16.

[0035] (Development) Figure 1(B) shows the state in which the flattened panel component 12, which has a flattened shape Q, is pulled up from the storage chamber 9 and unfolded toward the three-dimensional shape P in a forward-tilting position in order to form a box-shaped body 11a on the trolley 1.

[0036] As shown in Figure 6, the flattened body 11b stored in the storage compartment 9 can be released diagonally upward from the storage compartment 9 by raising it using the pivot means 18 for raising and lowering as a fulcrum. To facilitate the raising operation, it is preferable to provide handles 19 on the front panel 13A and the rear panel 13B.

[0037] As shown in Figures 7 and 8, the raised panel assembly 12 is in a forward-tilting position, tilted toward the front baseboard 5A around the pivot means 18. The left panel 13L and the right panel 13R are extended from their half-folded state, and the front panel 13A is moved forward toward the front baseboard 5A to be unfolded. The front panel 13A moves forward while its lower end slides along the horizontal frame 7, loosely fitted between the left baseboard 5L and the right baseboard 5R. At this time, as shown in Figure 7(B), an engaging means 20 is provided at the lower end of the front panel 13A, and the front panel 13A can be moved forward effectively by sliding the engaging means 20 while engaged with the guide rail 7a. In the illustrated embodiment, the engaging means 20 is formed in a U-shape in cross-section and slides while holding the guide rail 7a.

[0038] (box body) Figure 1(C) shows the state in which the panel structure 12, in its three-dimensional form P, is placed on the frame 2 to form the box body 11a.

[0039] As described above, the unfolded panel structure 12 is in a nearly three-dimensional form P. When the front panel 13A is lifted out of the storage compartment 9 and placed on the front baseboard 5A, the left panel 13L and the right panel 13R are placed on the left baseboard 5L and the right baseboard 5R, respectively, in a straight line, as shown in Figures 9 and 10. The rear panel 13B is placed on the rear baseboard 5B, connected to the pivot means 18 for raising and lowering. This forms the box-shaped structure 11a on the trolley 1.

[0040] The box body 11a is preferably configured to maintain its three-dimensional shape P by means of the means shown in Figures 9(B), 9(C), and 9(D).

[0041] As shown in Figure 9(B), the left panel 13L and the right panel 13R, which are extended from their folded state, are held in their extended state and cannot be folded in half again by locking and fixing the locking means 21. In the illustrated example, a toggle lever type locking device is used, and by releasing the lock, the left panel 13L and the right panel 13R can be folded in half again.

[0042] As shown in Figure 9(C), the engaging means 20 forms a locking piece 22 that extends vertically from the outer surface of the front panel 13A beyond its lower end. When the panel structure 12, which has been formed into a three-dimensional shape P as described above, is placed on the frame 2, the locking piece 22 locks onto the outer surface of the front baseboard 5A, preventing the front panel 13A from falling toward the storage compartment 9.

[0043] As shown in Figure 9(D), the lower end of the front panel 13A is locked and fixed to the outer surface of the front baseboard 5A by the locking and fixing means 23 so that it cannot move up or down. In the illustrated example, a toggle lever type locking and fixing device is used, and the front panel 13A can be lifted by releasing the lock.

[0044] (Lid panel) As shown in Figures 1(C) and 1(D), when transporting goods using the trolley 1, the goods can be placed in the box body 11a, and the upper opening of the box body 11a can be closed with the lid panel 16.

[0045] As shown in Figures 11 and 12, the lid panel 16 is rotated upright from a state where it is stacked on the rear panel 13B via the pivot means 17, and as shown in Figure 13, it is placed on top of the four panels 13A, 13B, 13L, and 13R which form a three-dimensional shape P, thereby closing the upper opening of the box body 11a. In this case, it is preferable to provide a lid locking means 24, and as shown in Figure 13(B), a locking device is provided to lock and secure the lid panel 16 and the front panel 13A to each other. In the illustrated example, a toggle lever type locking device is used and is configured so that a lock such as a padlock can be attached, and the lid panel 16 can be opened again by releasing the lock.

[0046] (Partition panel) In the illustrated embodiment, as shown in Figures 14 and 15, a removable partition plate 25 is attached to divide the inside of the box-shaped body 11a formed on the trolley 1.

[0047] The partition plate 25 is inserted between the front panel 13A and the rear panel 13B so as to divide the internal space of the box body 11a in the X direction. As shown in Figure 15(B), it is preferable that the partition plate 25 is provided with a U-shaped fixing means 26 at its lower end that engages with and fixes when placed on the guide rail 7a, thereby allowing the partition plate 25 to be fixed in a positioned position. Furthermore, as shown in Figure 14, it is preferable that the upper end of the partition plate 25 is provided with a locking pin 27b that can be inserted and locked into locking holes 27a provided in the front panel 13A and the rear panel 13B.

[0048] Although the diagram shows one partition plate 25, it is possible to provide multiple partition plates 25 corresponding to multiple guide rails 7a. [Explanation of Symbols]

[0049] 1 cart 2 Frames 3 Caster 4. Support column with base 5A Front baseboard 5B Rear baseboard 5L left side baseboard 5R Right-side baseboard 6 Connector 7 Horizontal frame 7a Guide rail 8 circuit boards 9. Hangar Long side dimensions of the LX tray compartment Short side dimensions of the LY tray compartment 11a Box body EX, EY Box body outer dimensions 11b Flattened body 12 Panel Components P Panel Component Three-Dimensional Form Q Flattened form of the panel structure WX Flattened body length WY Flattened body short side dimension 13A Front Panel 13B Rear Panel 13L Left side panel 13R Right side panel 14. Pivoting means for the four corners of the panel structure 15. Pivoting mechanism that allows the left and right panels to be folded in half. 16 Lid Panel 17. Pivoting means for the lid panel 18. Pivoting mechanism for raising and lowering 19 Handle 20 Engaging means 21 Locking and fixing means for the left and right panels 22 Locking piece 23 Locking and fixing means for the front panel 24. Locking mechanism for the lid 25 partition plates 26 Fixing means 27a Locking hole 27b Locking pin

Claims

1. It consists of a trolley (1) with a frame (2) and a panel structure (12) for forming a box-shaped body on top of the trolley. The frame (2) is formed by a pair of opposing front baseboards (5A) and rear baseboards (5B), and a left baseboard (5L) and a right baseboard (5R), forming a rectangular frame in plan view, and a storage compartment (9) is formed inside the frame. The panel structure (12) is composed of a pair of opposing front panels (13A) and rear panels (13B), and a left panel (13L) and a right panel (13R). The side edges of adjacent panels are pivotally connected to each other so as to be rotatable, and the left panel (13L) and right panel (13R) are configured to be foldable in half toward the front panel (13A) and rear panel (13B). When the front panel (13A) and rear panel (13B) are stacked with the folded left panel (13L) and right panel (13R) in between, the panels overlap and fold into a flattened form (Q). When the left panel (13L) and right panel (13R) are extended from the folded state and the front panel (13A) and rear panel (13B) are separated, the panel structure (12) is configured to unfold into a three-dimensional form (P) such that the cross-section is rectangular. The rear panel (13B) is pivotally connected to the upper end of the rear baseboard (5B) of the frame via a pivoting means (18) so as to be rotatable around a horizontal axis. When the panel structure (12) is erected in a three-dimensional form (P), a box-shaped body (11a) with an opening at the top is formed and is placed on top of the frame (2). A trolley with a box, characterized in that the panel structure (12) is configured to be stored in the storage chamber (9) when it is laid on its side in a flattened form (Q).

2. The trolley with a box according to claim 1, characterized in that the pivoting means (18) is configured such that when the rear panel is rotated upright, the lower end surface of the rear panel (13B) rests on the upper surface of the rear baseboard (5B), and when the rear panel is rotated sideways, the rear panel (13B) faces the interior of the storage chamber (9).

3. With respect to the orthogonal X and Y directions on a plane, the frame (2) is framed in a rectangle by a front baseboard (13A) and a rear baseboard (13B) extending in the X direction and a left baseboard (13L) and a right baseboard (13R) extending in the Y direction, and the dimensions of the storage compartment (9) in the X direction (LX) and the Y direction (LY) are defined inside each baseboard having a predetermined thickness dimension (T). When the panel structure (12) is in a flattened form (Q), a flattened body (11B) is formed, and the external shape of the flattened body when laid on its side is configured such that the dimensions in the X direction (WX) and the Y direction (WY) are WX < LX and WY < LY, so that it can be stored in the storage chamber (9). The box-type trolley according to claim 2, characterized in that when the panel structure (12) is erected in a three-dimensional form (P), a box-type body (11A) is formed, and the outer shape of the box-type body in the erected state has the left panel (13L) and right panel (13R) protruding outward from the left and right side edges of the front panel (13A) and rear panel (13B), and the outer dimension (EX) of the distance between the left panel and the right panel in the X direction and the outer dimension (EY) of the distance between the front panel and the rear panel in the Y direction are configured such that LX < EX and LY < EY, so that the lower end surface of the panel forming the box-type body (11a) is placed on the upper end surface of the frame (2).

4. In a configuration in which a flattened body (11B) formed by a panel structure (12) in a flattened shape (Q) is raised by rotating it via the pivot means (18) from a state stored in the storage chamber (9), and the left panel (13L) and right panel (13R) are extended from a half-folded state relative to the rear panel (13B), and the front panel (13A) is moved forward toward the front baseboard (5A) to unfold into a three-dimensional shape (P), A guide rail (7a) extending in the direction of forward movement of the front panel (13A) is provided at the bottom of the storage compartment (9), and an engaging means (20) is provided at the lower end of the front panel (13A). The box-type trolley according to claim 2 or 3, characterized in that the front panel is moved forward by sliding the engaging means (20) engaged with the guide rail (7a) while the flattened body (11B) is tilted forward toward the front baseboard (5A) with respect to the pivoting means (18).

5. The engaging means (20) forms a locking piece (22) that extends vertically from the outer surface of the front panel (13A) beyond its lower end, The trolley with a box according to claim 4, characterized in that when the box body (11a) formed by standing up a three-dimensional panel structure (12) is placed on the frame (2), the locking piece (22) is configured to lock onto the outer surface of the front baseboard (5A).

6. A partition plate (25) is detachably provided to divide the inside of the box-shaped structure formed on the trolley. The box-type trolley according to claim 4, characterized in that the partition plate (25) has both sides attached to the front panel (13A) and the rear panel (13B), and is provided with a fixing means (26) at its lower end that engages with and is fixed to the guide rail (7a).

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