JP2009255653A - Foldable top panel for wheeled cart and foldable wheeled cart - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a foldable top panel for wheeled cart and a foldable wheeled cart having a connecting structure for preventing the top plate from opening at the time of use. <P>SOLUTION: This foldable top plate for wheeled cart having two top plates 1, 2 that are pivotally attached to a turning shaft 3 and a top plate connecting part 11 rotatably attached to the turning shaft 3 under a state in which the top plate is held between the top plates 1, 2, wherein the top plate connecting part 11 comprises a turning part 12 and a sliding part 13 that can be slid to be moved away from the turning shaft 3. The sliding part is further provided with fitting portions 14. Connecting surfaces 201, 202 of the top plates 1, 2 are provided with concave portions 301, 302 forming spaces for storing a turning part 12 under a state in which the top plates 1, 2 are connected to each other. Upper surfaces 101, 102 of the top plates 1, 2 are provided with fitting grooves 21 having wide width portions 21a communicated with the concave portions 301, 302. The fitting portions 14 of the top plate connecting part 11 under a state in which the top plates 1 and 2 are connected are foldable top plates for cart having a shape that can be fitted to the fitting grooves 21. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a foldable top plate for a cart and a cart equipped with the top plate.

  Cars with wheels on the back of the top board are often used to carry luggage. The top plate is secured with a sufficiently large top plate so that a load can be securely placed thereon. However, since the top plate is large, it may be difficult to secure a place for storing the cart.

  For this reason, a cart including a top plate that is divided into two and that can be folded is known (Patent Document 1).

Japanese Utility Model Sho 62-103771

  However, the above-described cart that can fold the top plate may cause a problem that the top plate may be opened when the balance of the load is lost or the vehicle passes through a step or an inclination. Luggage may fall off and cause an accident. Accordingly, an object of the present invention is to provide a foldable cart top plate and a folding cart having a connecting structure that prevents the top plate from being opened during use.

The top plate of the present invention includes two top plates that are rotatably attached to the rotary shaft, and a top plate connecting portion that is rotatably attached to the rotary shaft while being sandwiched between the top plates. A folding top plate for a cart,
The top plate connecting portion includes a rotating portion and a sliding portion that can slide away from the rotation shaft, and the sliding portion further includes a fitting portion,
The connecting surface of the top plate is provided with a recess that creates a space for storing the rotating portion in a state where the top plate is connected,
An upper surface of the top plate includes a fitting groove having a wide portion that communicates with the concave portion,
In the state where the top plate is connected, the insertion portion of the top plate connecting portion has a shape that can be inserted into the insertion groove.

  In the state where the top plate is connected, the insertion portion of the top plate connection portion can be inserted into the insertion groove into the insertion groove having a wide portion that communicates with the recess carved in the upper surface of the top plate, so that the wide portion of the insertion groove and Since the fitting portions engage with each other, the top plate is prevented from opening, and the top plate is firmly connected.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a foldable cart top plate and a cart according to the present invention will be described with reference to the drawings. However, the present invention is not limited to the embodiment shown in the drawings. FIG. 1 is a schematic view showing a state in which a top plate according to the present invention is folded, and wheels and handles necessary as a carriage are omitted. In the figure, a top plate 1, a top plate 2, and a top plate connecting portion 11 are rotatably attached to a rotary shaft 3. The top plate connecting portion 11 is attached at a position sandwiched between the top plate 1 and the top plate 2. Moreover, when the top plate 1 and the top plate 2 are folded, the top plate connecting portion 11 also plays a role of a handle.

  The main feature of the structure of the top plate of the present invention is that the top plates 1 and 2 are rotated so that the upper surface 101 of the top plate 1 and the upper surface 102 of the top plate 2 are connected to be in the same plane. In a state where the top plates 1 and 2 are connected, the insertion portion 14 of the top plate connecting portion 11 is inserted into the insertion grooves (21, 22 and the like) carved in the top plates 1 and 2, and the insertion groove 21 and the like are wide portions 21a. Since the insertion portion 14 includes the wide portion 14a, the top plates 1 and 2 are connected so as not to open. In addition, in the process in which the top plates 1 and 2 are connected (the upper surface 101 and the upper surface 102 are in the same plane), the insertion portion 13 can slide away from the rotary shaft 3 so that the insertion portion 13 does not get in the way. It has a structure. Hereinafter, these structures will be described in detail.

  The connecting surface 201 of the top plate 1 and the connecting surface 202 of the top plate 2 are provided with recesses 301 and 302, respectively. The recesses 301 and 302 create a space for accommodating the rotating portion 12 of the top plate connecting portion 11 in a state where the top plates 1 and 2 are connected. As shown in FIG. 2, the sliding portion 13 of the top plate connecting portion 11 is slidably attached to the rotating portion 12, and slides away from the rotary shaft 3 when the top plates 1 and 2 are connected. Is done.

  FIG. 3A shows the rotating unit 12. The rotating part 12 is composed of two scissors 12a and a connecting scissor 12b that couples the two scissors 12a. A groove 12c is formed on the outer side surface of the two scissors 12a, and the end part is rotated. A through hole 12d through which the shaft 3 passes is provided.

  FIG. 3B shows the sliding portion 13. The sliding part 13 is comprised by the two hooks 13a and the insertion part 14 which connects the two hooks 13a. A protrusion 13b is provided on the inner side of the end portions of the two flanges 13a, and can be fitted into the groove 12c of the rotating portion 12.

  Therefore, as shown in FIG. 3C, the top plate connecting portion 11 has a structure in which the protrusion 13b of the sliding portion 13 is fitted into the groove 12c of the rotating portion 12, and the sliding portion 13 is slidable. In addition, the insertion portion 14 is inserted into an insertion groove formed in the upper surfaces 101 and 102 of the top plates 1 and 2, and the top plates 1 and 2 are connected so as not to open.

  FIG. 4 is a view showing a state in which the top plates 1 and 2 are slightly opened, with the top plate connecting portion 11 removed. The recesses 301 and 302 respectively provided in the connection surface 201 of the top plate 1 and the connection surface 202 of the top plate 2 create a space for accommodating the rotating portion 12 of the top plate connection portion 11 as described above. The insertion grooves 21 to 24 are carved on the upper surfaces 101 and 102 of the top plates 1 and 2. The fitting grooves 21 to 24 include wide portions 21 a to 24 a extending from the connecting surface 201 or the connecting surface 202 in a direction away from the rotary shaft 3 and having a wider groove.

  FIG. 5 is a view showing a state in which the top plates 1 and 2 are completely opened, with the top plate connecting portion 11 removed. The connection surfaces 201 and 202 of the top plates 1 and 2 are substantially in contact with each other. By the recesses 301 and 302, a space that opens to the upper surfaces 101 and 102 of the top plates 1 and 2 and is parallel to the rotation shaft 3 is formed. Further, the insertion grooves 21 and 22 are opened on the upper surface 101, and the insertion grooves 23 and 24 are opened on the upper surface 102.

  FIG. 6 is a view showing a state in which the top plates 1 and 2 are completely opened, including the top plate connecting portion 11. In the figure, the sliding portion 13 of the top plate connecting portion 11 is in a position slid away from the rotating shaft 3. In addition, at least immediately before and when the top plates 1 and 2 are completely opened, the sliding portion 13 is in such a slid position. The rotating part 12 of the top plate connecting part 11 is housed in a space formed by the recessed parts 301 and 302.

  With the top plates 1 and 2 fully opened, the sliding portion 13 slides so as to approach the rotating shaft 3, and the fitting portion 14 is fitted into the fitting grooves 21 to 24. The state in which the insertion portion 14 is inserted is shown in FIG. In this state, since the wide portion 14a of the insertion portion 14 and the wide portions 21a to 24a of the insertion grooves are engaged with each other, the top plates 1 and 2 are prevented from opening, and the top plates 1 and 2 are firmly connected. The

  When the top plates 1 and 2 are folded, the sliding portion 13 is pulled up to disengage the wide portion 14a of the insertion portion 14 from the wide portions 21a to 24a of the insertion grooves, and the top plates 1 and 2 are rotated. And fold it. It is preferable to provide the concave portions 31 and 32 on the upper surfaces 101 and 102 so that the sliding portion 13 can be easily lifted.

  In order to prevent the top plates 1 and 2 from being opened in a state in which the top plates 1 and 2 are folded, it is preferable to include locking protrusions 41 and 42 shown in a one-dot chain line ellipse in FIG. . FIG. 8 is an enlarged view of the inside of the dashed-dotted ellipse in FIG. In a state where the top plates 1 and 2 are folded, the projecting piece 41 is attached to the side surface of the top plate 1 and extends toward the facing top plate 2. On the contrary, the projecting piece 42 is attached to the side surface of the top plate 2 and extends toward the facing top plate 1. The protrusion 41 is provided with a protrusion 43, and the protrusion 42 is provided with a hole 44. Therefore, in a state where the top plates 1 and 2 are folded, the projection 43 of the projecting piece 41 is locked in the hole 44 of the projecting piece 42 so that the top plates 1 and 2 are not easily opened.

  The shapes of the insertion grooves and the insertion portions carved in the upper surfaces 101 and 102 of the top plates 1 and 2 are not limited to the above-described shapes, and may be any shape that can prevent the top plates 1 and 2 from opening. . For example, as shown to Fig.9 (a), you may provide the wide parts 21a-24a of each insertion groove 21-24 not in the edge part of an insertion groove but in the intermediate part of the insertion groove. Moreover, as shown in FIG.9 (b), the insertion grooves 25-28 are good also as an insertion groove extended diagonally with respect to the longitudinal direction R of a top plate, without providing a wide part. In these examples, the shape of the insertion portion may be selected according to the shape of the insertion groove.

  Next, the wheel will be described. With the top plates 1 and 2 connected, the wheels are attached to the four corners on the back of the top plates 1 and 2. For example, as shown in FIG. 10, a pair of wheels 61 and 62 are attached to the back surface of the top plate 2. A pair of wheels (not shown) are also attached to the top plate 1, but it is preferable to attach the wheels in a state where the top plates 1 and 2 are folded. For example, the distance between the wheels may be narrowed so that the pair of wheels attached to the top plate 1 fits between the pair of wheels attached to the top plate 2. For reinforcement of the top plates 1 and 2, lattice-like ribs 71 are provided on the back surfaces of the top plates 1 and 2.

  Although it is possible to carry a load even when the wheels are attached to the top plates 1 and 2, it is more preferable to attach a handle to the top plate. In use, the handle is preferably erected vertically with respect to the top plate. If the handle is perpendicular to the top plate, it may become an obstacle during storage. Therefore, it is preferable that the handle also has a folding structure. An example is shown in FIG. Mounting brackets 82 a and 82 b are attached to the edge of the top plate 1. The ends 81a and 81b of the U-shaped handle 81 are rotatably attached to the mounting brackets 82a and 82b by pins 83a and 83b. The mounting brackets 82a and 82b have long holes 85a and 85b, respectively, and the shaft 84 passes through the long holes 85a and 85b. The springs 86a and 86b are connected between the pins 83a and 83b and the shaft 84.

  The shaft 84 is in contact with the ends 81a and 81b of the handle 81 by the force of the springs 86a and 86b. In this state, the handle 81 is erected vertically with respect to the top plate 1, and the cart can be pushed by holding the handle 81. When lowered below the shaft 84, the shaft 84 is separated from the end portions 81 a and 81 b of the handle 81, and the handle 81 can be rotated to fold the handle 81.

  Further, if the handle 81 is long even when folded, it may be difficult to store the carriage. Therefore, the handle 81 preferably has an expansion / contraction mechanism. An example of the expansion / contraction mechanism is shown in FIGS. The handle 81 is inserted into the pipes 81d and 81e so that the U-shaped pipe 81c can be expanded and contracted, and is fixed by the expansion and contraction mechanism 90, and is fixed and released as necessary. Further, the link 91 is provided with an engagement piece 92 which can be engaged with an engagement groove formed on the top plate so that the handle 81 does not open when the top plates 1 and 2 are folded. Fixed to.

  The tip 94a of the fitting piece 94 is fitted into holes 81g and 81h formed in the pipes 81c and 81d. The protrusion 94b of the insertion piece 94 is slidably inserted into the hole 91a of the link 91, and when it is biased by the spring 93, the insertion piece 94 cannot move and the pipes 81c and 81d cannot expand and contract. Yes.

  When the link 91 is pushed downward, the insertion piece 94 moves and the tip 94a is removed from the holes 81g and 81h (only 81h may be used), so that the handle 81 can be expanded and contracted. If the recess 81i is provided in the pipe 81c at a position where the tip 94a of the fitting piece 94 comes into contact with the handle 81 being contracted, the handle 81 can be prevented from being inadvertently extended. Further, such an expansion / contraction mechanism may be provided on the side of the pipe 81e so as to be symmetrical.

  A schematic diagram of the carriage is shown in FIG. Wheels 61, 63 and the like are attached to the four corners of the back surfaces of the top plates 1, 2. The handle 81 that can be folded and expanded as described above is provided. On the top surface of the top plate 2, an engagement groove 99 is formed so that the engagement piece 92 of the telescopic mechanism 90 can be engaged when the handle 81 is folded.

FIG. 1 is a schematic view showing a state in which a top plate according to the present invention is folded. FIG. 2 is a schematic view showing a state in which the top plate according to the present invention is folded. 3A is a view showing a rotating portion, FIG. 3B is a view showing a sliding portion, and FIG. 3C is a view showing a top plate connecting portion. FIG. 4 is a diagram illustrating a process of connecting the top plates with the top plate connecting portion removed. FIG. 5 is a diagram showing a state in which the top plates are completely connected, with the top plate connecting portion removed. FIG. 6 is a view showing a state in which the top plates are completely connected, including the top plate connecting portion. FIG. 7 is a diagram illustrating a state in which the insertion portion of the top plate coupling portion is inserted into the insertion groove. FIG. 8 is an enlarged view of the inside of the dashed-dotted ellipse in FIG. FIGS. 9A and 9B are views showing examples of insertion grooves carved on the top surface of the top plate. FIG. 10 is a diagram illustrating a state in which wheels are attached to the back surface of the top board. FIG. 11 is a diagram illustrating a state in which a handle is attached to the top board. 12 (a) and 12 (b) are diagrams showing a handle expansion / contraction mechanism. FIG. 13 is a schematic view of a cart according to the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 2 Top plate 11 Top plate connection part 12 Rotating part 13 Sliding part 14 Insertion part 81 Handle 90 Telescopic mechanism of a handle

Claims (7)

A foldable cart top plate having two top plates rotatably attached to the rotation shaft and a top plate connecting portion rotatably attached to the rotation shaft while being sandwiched between the top plates Because
The top plate connecting portion includes a rotating portion and a sliding portion that can slide away from the rotation shaft, and the sliding portion further includes a fitting portion,
The connecting surface of the top plate is provided with a recess that creates a space for storing the rotating portion in a state where the top plate is connected,
An upper surface of the top plate includes a fitting groove having a wide portion that communicates with the concave portion,
A folding top plate for a cart, wherein the top plate connecting portion has a shape that allows the top plate connecting portion to be inserted into the insertion groove in a state where the top plate is connected. A foldable cart top plate having two top plates rotatably attached to the rotation shaft and a top plate connecting portion rotatably attached to the rotation shaft while being sandwiched between the top plates Because
The top plate connecting portion includes a rotating portion and a sliding portion that can slide away from the rotation shaft, and the sliding portion further includes a fitting portion,
The connecting surface of the top plate is provided with a recess that creates a space for storing the rotating portion in a state where the top plate is connected,
On the top surface of the top plate is provided with an insertion groove communicating with the recess and extending obliquely with respect to the longitudinal direction of the top plate,
A folding top plate for a cart, wherein the top plate connecting portion has a shape that allows the top plate connecting portion to be inserted into the insertion groove in a state where the top plate is connected.   The top plate for a foldable cart according to claim 1 or 2, further comprising a projecting piece on each side surface of the two top plates, the two projecting pieces being engageable with the top plate being folded. .   The folding cart provided with the wheel at the four corners of the back of the top plate in the state where the top plate was connected to the top plate according to any one of claims 1 to 3.   A folding cart provided with a foldable handle on the top plate according to claim 4.   The folding cart according to claim 5, wherein the handle includes a telescopic mechanism.   The folding cart according to claim 6, wherein the telescopic mechanism includes an engagement piece that can be engaged with an engagement groove carved in the top plate in a state in which the handle is folded.

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