JP2014184801A - Carriage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a carriage capable of the connection and a connection release even in a state of protruding a part of a cargo above a connection part.SOLUTION: A carriage 10 comprises a loading space 20 for forming an upper surface as a loading space surface 20A, an upper side connection part 30 provided in a height of not exceeding upward more than a height of the loading space surface 20A on the front end of the loading space 20, a lower side connection part 40 provided in a height of not exceeding upward more than the height of the loading space surface 20A on the rear end of the loading space 20 and connected to the upper side connection part 30 by overlapping with the lower side of the upper side connection part 30, a projection part 34 provided in the upper side connection part 30 and an opening forming part 44 provided in the lower side connection part 40 and having an opening 44A for connecting the upper side connection part 30 and the lower side connection part 40 by unevenly fitting to the projection part 34. An inclined face 44B is provided in both the projection part 34 and the opening forming part 44, and the lower side connection part 40 rotates downward with a boundary part with the loading space 20 as a fulcrum by being pressed downward.

Description

  The present invention relates to a carriage for carrying a load on a loading platform surface of the loading platform.

  2. Description of the Related Art Conventionally, in a cart that is used in a warehouse or the like and carries a work for loading and transporting a load on the loading platform surface of a loading platform, a coupling portion is provided at the end of the loading platform, and the coupling portion of the cart and the coupling portion of another cart There are known carts that can be connected to each other.

  Patent Document 1 discloses a transport carriage in which a first connection portion having an annular structure is provided on one side surface and a second connection portion is provided on the other side surface. In this transport cart, the second connecting portion is configured such that an engagement projection is provided at the tip of the rod-shaped member, and is rotated upward with a support portion for the transport cart as a fulcrum. And when connecting the said conveyance trolley and another conveyance trolley, the engagement protrusion of a 2nd connection part is engaged with the 1st connection part of an annular structure by rotating a 2nd connection part upwards. The transport carriage can be connected to another transport carriage.

JP 2006-13385 A

  However, in the transport cart described in Patent Document 1, the second connecting portion that is rotatable is provided in a shape protruding to the side of the transport cart. I couldn't load some of my luggage. In addition, since the second connecting portion is configured to rotate upward, the second connecting portion is rotated in a state in which a part of the luggage loaded on the transport carriage protrudes above the second connecting portion. It was not possible to connect and disconnect the transport cart and another transport cart.

  An object of the technology disclosed in the present specification is to provide a cart that can be connected and disconnected even when a part of the luggage protrudes above the connecting portion.

  The technology disclosed in the present specification includes a rectangular cargo bed whose upper surface is a cargo bed surface, and an upper connecting portion provided at a height not exceeding the height of the cargo bed surface at one end of the cargo bed, The other end of the loading platform opposite to the one end is provided at a height not exceeding the height of the loading platform surface, and at least a part of the loading platform overlaps the lower side of the upper coupling portion. A lower connecting portion to be connected, a protruding portion that is provided on one of the upper connecting portion and the lower connecting portion and protrudes with respect to the cargo bed surface; and the upper connecting portion and the lower connecting portion. An opening forming portion provided on one of the other and having an opening for connecting the upper connecting portion and the lower connecting portion by engaging the protrusion with the projection, and the protruding portion and the opening forming portion. Guide the protrusion to the opening in at least one of the The inclined surface is provided that, the lower connecting portion is rotated downward as a fulcrum boundary between the loading platform by being pressed downward, to the bogie.

  In the above trolley, since at least one of the projecting portion and the opening forming portion is provided with an inclined surface for guiding the projecting portion to the opening, when one trolley is connected to the other trolley, the upper side of the other trolley Just by bringing the connecting part (lower connecting part) closer to the lower connecting part (upper connecting part) of one carriage, the projecting part is smoothly guided to the opening side by the inclined surface, and the projecting part and the opening are unevenly fitted. Combined. At this time, when the upper connecting portion and the lower connecting portion come into contact with each other, the lower connecting portion is pressed downward, and the lower connecting portion rotates downward. For this reason, an upper side connection part and a lower side connection part can be easily connected, without lifting one trolley | bogie or the other trolley | bogie.

  Also, simply pressing the lower connecting portion downward causes the lower connecting portion to rotate downward and the protruding portion to be removed from the opening, so that the upper connecting portion and the lower connecting portion are not directly touched with the protruding portion or the opening forming portion. The connection with the side connecting portion can be released. Furthermore, since both the upper connecting portion and the lower connecting portion are provided at a height that does not exceed the height of the loading platform surface, a part of the luggage protrudes above the upper connecting portion and the lower connecting portion. It is possible to place a load on the cargo bed surface. In this state, by rotating the lower connecting portion downward, the upper connecting portion and the lower connecting portion can be connected and disconnected. Accordingly, the connection and connection can be released even when a part of the luggage protrudes above the connection part.

  The protruding portion has a protruding portion-side inclined surface that is inclined upward from the inside of the loading platform to the outside with respect to the loading platform surface, and the opening forming portion is formed from the inside of the loading platform with respect to the loading platform surface. An opening-side inclined surface that is inclined downward toward the outside, and the protrusion-side inclined surface and the opening-side inclined surface are in contact with each other when the protrusion and the protrusion are fitted into the concave and convex portions; At least one of the side inclined surface and the opening-side inclined surface may be a curved surface bulging outward.

  According to this configuration, when the protrusion is guided into the opening, the protrusion is guided more smoothly toward the opening by the protrusion-side inclined surface and the opening-side inclined surface. And the lower connecting portion can be more easily connected, and workability can be improved.

  The lower connection portion may include a connection release portion provided below the height of the cargo bed surface at an end portion of the lower connection portion.

  When a part of the load placed on the loading platform surface protrudes above the lower connecting portion, it may be difficult to press the lower connecting portion downward due to the load. According to the above configuration, since the lower connecting portion has the connection releasing portion provided below the height of the loading platform surface at the end of the lower coupling portion, one of the loads placed on the loading platform surface is provided. Even when the part protrudes above the lower connection part, the lower connection part can be rotated downward by pressing the connection release part downward without causing the load to get in the way. Workability can be improved.

  Other techniques disclosed in the present specification include a rectangular first cargo bed portion having a cargo bed surface on an upper surface, a rectangular second cargo bed portion, a short side portion of the first cargo bed portion, and the second A second posture lower than the first posture and a first posture in which the upper surfaces of the second cargo bed portion are parallel to the first cargo bed portion; A connecting portion that is displaced to a posture, and a first connecting portion that is provided on the other side of the first cargo bed portion that is different from the one end side, and has one of a protruding portion and an opening on the lower surface side And the second cargo bed portion is provided on the other edge portion side different from the one edge side portion, and has either the projection or the opening on the upper surface side, and the second cargo bed portion is When it is in the first posture, it is connected to one of the projecting portion and the opening on the lower surface side of the first connecting portion in another cart, Secondly, when the loading platform is in the second posture, the second cart is separated from either the projecting portion on the lower surface side of the first coupling portion and the opening in the other cart to release the coupling with the other cart. And a connecting part.

  In this cart, since the upper surfaces of the first loading platform and the second loading platform are parallel to each other in the first posture, the luggage is loaded on the first loading platform with a part of the luggage protruding above the second loading platform. be able to. In this posture, the second connecting portion of one cart can be connected to the first connecting portion of the other cart, and the second connecting portion of one cart is in the second posture lower than the first posture. And the connection of the 1st connection part of the other trolley | bogie can be cancelled | released. For this reason, even if it is in the state where a part of luggage protruded above the 1st connection part and the 2nd connection part, connection and connection with the 1st connection part and the 2nd connection part can be canceled.

  According to the technology disclosed in this specification, it is possible to provide a cart that can be connected and disconnected even when there is a part of a load above the connecting portion.

The perspective view which looked at the trolley | bogie which concerns on embodiment from the front side A plan view of the cart viewed from above A plan view of the dolly viewed from below Dolly right side view Sectional view of vv section in FIG. The perspective view which looked at the trolley | bogie in the state which rotated the lower side connection part below from the front side Sectional drawing which shows the connection aspect of an upper side connection part and a lower side connection part in order Sectional drawing which shows the cancellation | release aspect of a connection with an upper side connection part and a lower side connection part

  The embodiment will be described with reference to FIGS. In this embodiment, the cart 10 for carrying and carrying a load on the loading platform surface 20A of the loading platform 20 is illustrated. A part of each drawing shows axes indicating the front-rear direction, the left-right direction, and the up-down direction with respect to the carriage 10, and each direction is drawn in a common direction in each drawing.

  The cart 10 is made of, for example, a synthetic resin such as polypropylene. As shown in FIGS. 1 to 3, the cart 10 (an example of the first cargo bed part) 20, an upper coupling part (an example of the first coupling part) 30, , And a lower connection part (an example of a second cargo bed part) 40. The cart 10 of the present embodiment is connected to other carts in the front-rear direction by connecting the upper coupling portion 30 (lower coupling portion 40) with the lower coupling portion (upper coupling portion) of the other cart. It can be configured. In a state in which the upper connecting portion 30 and the lower connecting portion 40 are connected, the upper connecting portion 30 overlaps with the lower connecting portion 40 on the upper side, and the lower connecting portion 40 is connected to the upper connecting portion 30. It is supposed to overlap with the lower side.

  The loading platform 20 has a plate shape having a rectangular shape (rectangular shape) in plan view, and the upper surface thereof is a loading platform surface 20A on which a load is placed. As shown in FIG. 3, free wheels 50 that can rotate 360 ° are attached to the four corners of the lower surface of the loading platform 20.

  The upper connecting part 30 has a plate-like part 32 and a protruding part 34. The upper connecting portion 30 is provided at a height that does not exceed the height of the loading platform surface 20 </ b> A of the loading platform 20. As shown in FIGS. 1 and 2, the plate-like portion 32 protrudes forward from the central portion in the left-right direction at the front end 20 </ b> B of the loading platform 20, and is provided in a plate shape having a substantially triangular shape in plan view. .

  As shown in FIG. 3, the projecting portion 34 has a substantially circular shape in a plan view, and projects downward from the front end portion of the plate-like portion 32 perpendicularly to the loading surface 20 </ b> A. The configuration of the upper connecting portion 30 will be described in detail later.

  The lower connection part 40 includes a placement part 42, an opening formation part (an example of a second connection part) 44, and a connection release part 46. The lower connecting portion 40 is provided at a height that does not exceed the height of the loading platform surface 20 </ b> A of the loading platform 20. As shown in FIG. 3, the lower connection portion 40 is attached to the rear end 20 </ b> C of the loading platform 20 by a plurality of attachment springs (an example of a coupling portion) 52. Each attachment spring 52 is attached to both the loading platform 20 and the lower coupling portion 40 so as to straddle the boundary portion (the rear end 20C of the loading platform 20) between the loading platform 20 and the lower coupling portion 40.

  The mounting portion 42 constitutes most of the lower connection portion 40. The upper surface 42A of the mounting portion 42 is located on the same plane as the loading platform surface 20A of the loading platform 20, and constitutes one flat surface connected to the loading platform surface 20A. For this reason, even if a part of the luggage placed on the loading platform surface 20A protrudes behind the loading platform surface 20A, a part of the protruding luggage can be placed on the upper surface of the placement section 42. It is possible.

  The opening forming portion 44 is provided at a central portion in the left-right direction on the rear side of the placement portion 42 so as to be lowered downward with respect to the upper surface of the placement portion 42. The opening forming portion 44 has a substantially triangular shape in plan view that is slightly larger than the plate-like portion 32 of the upper connecting portion 30 that has a substantially triangular shape in plan view. An opening 44 </ b> A that penetrates the lower connecting portion 40 in the vertical direction is formed at the center of the opening forming portion 44. In addition, the connection release portion 46 is provided in a shape that is stepped downward with respect to the upper surface 42A of the placement portion 42 at both ends in the left-right direction on the rear side of the lower connection portion 40. The configuration of the lower connecting portion 40 will be described in detail later.

  Further, four side rollers 54 are attached to the right side surface of the loading platform 20 at substantially equal intervals. The side roller 54 is made of synthetic resin, has a rotation axis (not shown) perpendicular to the loading platform surface 20A, and is rotatable about the rotation axis.

  A pair of receiving recesses 22 is provided at the corner of the loading platform 20 in front of the loading platform surface 20A. The housing recess 22 is provided so as to extend along the left-right direction. When stacking other carts, when stacking only the front end or rear end of other carts, a pair of receiving recesses 22 with the pair of universal wheels provided at the front end or rear end of the other cart facing left and right. Each of the other carts can be positioned by being placed on each.

  As shown in FIG. 1, a grip hole 24 that can be gripped when carrying the carriage 10 is provided in a shape that is elongated in the front-rear direction at a substantially central portion in the front-rear direction near the left side surface of the loading platform 20. It has been. Furthermore, anti-slip ribs 26 are provided at the edges of the load carrier surface 20A near the right side surface and the left side surface so as to prevent the load placed on the load surface 20A from sliding down in the width direction (left-right direction). It is provided over almost the entire region of the loading platform 20 along the front-rear direction.

  Then, the structure of the upper side connection part 30 is demonstrated in detail. As shown in FIGS. 4 and 5, the plate-like portion 32 of the upper connecting portion 30 has a thickness (dimension in the vertical direction) that is sufficiently smaller than the thickness of the loading platform 20, and its upper surface 32 </ b> A is It is provided so as to be on the same plane as the loading platform surface 20 </ b> A of the loading platform 20.

  As shown in FIGS. 4 and 5, the protruding portion 34 of the upper connecting portion 30 protrudes downward with a dimension that does not protrude below the lower surface 20 </ b> B of the loading platform 20. An inclined surface (hereinafter referred to as a protruding portion-side inclined surface) 34 </ b> A that is inclined upward from the inner side to the outer side (from the rear to the front) of the loading platform 20 is provided at the tip of the protruding portion 34. Specifically, the protrusion-side inclined surface 34A has a curved surface that slightly swells toward the outside of the protrusion 34 (see FIG. 7).

  Then, the structure of the lower side connection part 40 is demonstrated in detail. The lower connecting portion 40 has a lower surface thereof connected to the loading platform 20 by the plurality of mounting springs 52 as described above, so that a boundary portion (the loading platform 20 of the loading platform 20 is connected to the loading platform 20 via the mounting spring 52). The entire rear end 20C) can be turned downward. FIG. 6 shows a perspective view of the cart 10 in a state where the lower connecting portion 40 is rotated downward from the front side. By rotating the lower connecting portion 40 downward, the upper surface 42A of the placing portion 42 is inclined with respect to the loading platform surface 20A of the loading platform 20 (see the dashed line in FIG. 6).

  In the natural state of the mounting spring 52, the lower connecting portion 40 is positioned on the same plane as the loading surface 20 </ b> A of the loading platform 20 as described above by the elastic force of the mounting spring 52. It is set as the state (an example of a 1st attitude | position). In this state, by pressing the lower connecting portion 40 from above, the lower connecting portion 40 can be rotated downward against the elastic force of the mounting spring 52. When the force that is pressing the lower connecting portion 40 downward is lost in the state where the lower connecting portion 40 is rotated downward (an example of the second posture), the elastic return force of the mounting spring 52 causes the lower connecting portion 40 to move downward. The side connecting portion 40 returns to the original state, that is, the state where the upper surface 42A of the mounting portion 42 is located on the same plane as the loading surface 20A of the loading platform 20. The elastic force of the mounting spring 52 is adjusted so that it can be rotated by pressing the lower connecting portion 40 with a small force.

  As shown in FIG. 2, the opening 44 </ b> A formed in the opening forming portion 44 is open so as to have an elliptical shape with the front-rear direction being the major axis direction in plan view. The opening 44A has a size that allows the protrusion 34 to be inserted therein. When the upper connecting portion 30 and the lower connecting portion 40 are connected, the protruding portion 34 of the upper connecting portion 30 is inserted into the opening 44A formed in the opening forming portion 44 of the lower connecting portion 40. Thus, the opening 44 </ b> A and the protrusion 34 are concavo-convexly fitted, so that the upper connecting part 30 and the lower connecting part 40 are connected.

  As described above, the opening forming portion 44 has substantially the same shape as the plate-like portion 32 of the upper connecting portion 30 in a plan view, and has a size that is slightly larger than the plate-like portion 32. When the upper connecting portion 30 and the lower connecting portion 40 are connected, the protruding portion 34 is inserted into the opening 44 </ b> A by the plate-like portion 32 entering the opening forming portion 44.

  Here, the opening forming portion 44 of the lower connecting portion 40 is provided such that the upper surface thereof is positioned slightly below the lower surface 32 </ b> B of the plate-like portion 32 in the upper connecting portion 30. Therefore, in a state where the upper connecting portion 30 and the lower connecting portion 40 are connected, the lower surface 32B of the plate-like portion 32 in the upper connecting portion 30 and the upper surface 44C of the opening forming portion 44 in the lower connecting portion 40 are slightly separated. It will be in the state. For this reason, in a state where the upper connecting portion 30 and the lower connecting portion 40 are connected, the upper connecting portion 30 and the lower connecting portion 40 do not interfere with each other in the vertical direction, and are connected in the front-rear direction. The free wheel of any one of the carts does not leave the ground plane.

  As shown in FIG. 5, on the rear side of the opening 44 </ b> A in the opening forming portion 44, an inclined surface (hereinafter referred to as an opening-side inclined surface) that is inclined downward from the inside to the outside of the loading platform 20 (from the rear to the front). 44B) is provided. Specifically, the opening-side inclined surface 44B has a curved surface that slightly bulges toward the outside of the protruding portion 34, like the protruding portion-side inclined surface 34A of the protruding portion 34 of the upper connecting portion 30 (see FIG. 7). The opening side inclined surface 44B is provided at substantially the same height as the protruding portion side inclined surface 34A.

  In addition, the connection release portions 46 provided at both ends in the left-right direction on the rear side of the lower connection portion 40 are provided with a step difference downward with respect to the upper surface 42A of the placement portion 42, so that the toes of the foot Etc. so that it can be easily pressed downward. Accordingly, when the lower connecting portion 40 is rotated downward, the lower connecting portion 40 can be easily rotated downward by pressing the connection release portion 46 downward with a toe of a foot or the like. .

  In a state where the upper connecting portion 30 and the lower connecting portion 40 are connected, either the connection releasing portion 46 or the lower connecting portion 40 is pressed downward, and the lower connecting portion 40 rotates downward. By doing so, the projecting portion 34 provided in the upper connecting portion 30 comes out of the opening 44A provided in the lower connecting portion 40, and thereby the connection is released.

  In addition, the space | interval between the front end 20B of the loading platform 20 and the protrusion part 34 of the upper side connection part 30 is slightly larger than the space | interval between the rear end of the lower side connection part 40, and the opening 44A of the lower side connection part 40. It is supposed to be. For this reason, when the protrusion 34 of one cart 10 is inserted into the opening of the other cart, the front end of the loading platform of the other cart does not interfere with the lower connection portion 40 of the one cart 10. Yes.

  The above is the configuration of the carriage 10 according to the present embodiment. Next, a method for connecting the carriage 10 and another carriage 110 and a method for releasing the connection will be described with reference to FIGS. 7 and 8. 7 and 8, each part of the rear carriage 110 is represented by adding reference numeral 100 to the reference numerals attached to the respective parts of the front carriage 10. The structure, operation, and effect of each part of the rear carriage 110 are the same as those of the above-described carriage 10.

  First, a method for connecting the cart 10 of this embodiment to another cart 110 will be described. When the other carriage 110 is connected to the carriage 10 in the front-rear direction, the upper connecting portion 130 provided at the front end of the rear carriage 110 is connected to the front carriage 10 as shown in the upper part of FIG. It approaches the lower connection part 40 provided in the rear end part 40. At this time, as described above, the upper surface 132A of the plate-like portion 132 in the upper coupling portion 130 of the rear carriage 110 and the upper surface 42A of the mounting portion 42 in the lower coupling portion 40 of the front carriage 10 are as high as possible. Are almost identical. Further, the protruding portion side inclined surface 134A of the protruding portion 134 in the upper connecting portion 130 of the rear carriage 110 and the opening side inclined surface 44B of the opening forming portion 44 in the lower connecting portion 40 of the front carriage 10 have a height. Are almost identical.

  Next, the rear carriage 110 is further brought closer to the front carriage 10, and the protrusion-side inclined surface 134 </ b> A of the protrusion 134 in the upper connection section 130 of the rear carriage 110 is formed in the lower connection section 40 of the front carriage 10. The opening side inclined surface 44B of the opening forming portion 44 is pressed by the protruding portion side inclined surface 134A of the protruding portion 134 by contacting the opening side inclined surface 44B of the portion 44 and bringing the rear carriage 110 closer to the front carriage 10. To do. Then, the protruding portion 134 is guided toward the opening 44 by the opening-side inclined surface 44B of the opening forming portion 44 and the protruding-portion-side inclined surface 134A of the protruding portion 134. At this time, since the opening-side inclined surface 44B of the opening forming portion 44 and the protruding portion-side inclined surface 134A of the protruding portion 134 are both curved to bulge outward, the protruding portion 134 faces the opening 44 side. It will be guided smoothly. Then, as the protruding portion 34 approaches the opening 44A side, the opening-side inclined surface 44B of the opening forming portion 44 is pressed downward by the protruding portion 134, and the lower connecting portion 40 moves downward against the elastic force of the mounting spring 52. It rotates (state shown in the middle part of FIG. 7).

  When the rear carriage 110 is brought closer to the front carriage 10, the projecting portion 134 enters to above the opening 44, and the projecting portion side inclined surface 134 </ b> A of the projecting portion 134 is separated from the opening side inclined surface 44 </ b> B of the opening forming portion 44. . Then, the force pressing the opening-side inclined surface 44B of the opening forming portion 44 disappears, and the lower connecting portion 40 is in its original state by the elastic return force of the mounting spring 52, that is, the upper surface 42A of the mounting portion 42 is the loading platform. It returns to the state located on the same plane as 20 cargo bed surfaces 20A. As a result, the protruding portion 134 is inserted into the opening 44 (the state shown in the lower part of FIG. 7). As a result, the protrusion 134 in the upper coupling portion 130 of the rear carriage 110 interferes with the side surface in the opening 44 in the lower coupling section 40 of the front carriage 10 in the front-rear direction, and the upper coupling portion of the rear carriage 110 is 130 is connected to the lower connecting portion 40 of the front carriage 10.

  Next, a method for releasing the connection between the carriage 10 of this embodiment and the other carriage 110 will be described. When the connection between the front carriage 10 and the rear carriage 110 is released, a part of the lower connection portion 40 (for example, the connection release portion 46) of the front carriage 10 is pressed downward such as a toe of a foot. As a result, the lower connecting portion 40 rotates downward against the elastic force of the mounting spring 52, and the protruding portion 134 in the upper connecting portion 130 of the rear carriage 110 is opened in the lower connecting portion 40 of the front carriage 10. 44 (the state shown in FIG. 8). In this state, by pulling the rear carriage 110 rearward, the connection between the front carriage 10 and the rear carriage 110 can be released.

  Note that the upper surface 32A of the plate-like portion 32 of the upper connecting portion 30 and the upper surface 42A of the mounting portion 42 of the lower connecting portion 40 are both positioned at substantially the same height as the loading surface 20A of the loading platform 20. Therefore, the luggage 60 is placed on the front carriage, and as shown in FIG. 8, a part of the luggage 60 protrudes on the upper surface 42 </ b> A of the placement section 42 in the lower connecting portion 40 of the front carriage 10. Even if it exists, connection with the front trolley | bogie 10 and the back trolley | bogie 110 can be cancelled | released. In this case, in the lower connection portion 40, the connection release portion 46 is configured to be one step lower than the upper surface 42A of the placement portion 42, so that the placement portion is mounted by the luggage 60 protruding on the upper surface 42A of the placement portion 42. Even if there is no portion that can be pressed downward on the upper surface 42A of 42, the connection release portion 46 can be pressed downward, and the connection can be easily released.

  Similarly, even when a part of the luggage 60 placed on the front carriage 10 protrudes from the upper surface 42A of the placement section 42 in the lower connection part 40 of the front carriage 10, the rear The protruding portion 134 of the upper connecting portion 130 of the bogie 110 can be advanced to above the opening 44 of the lower connecting portion 40 of the front bogie 10, and the bogie 110 is connected to the front bogie 10 from the rear. Can do.

  As described above, the carriage 10 according to the present embodiment is provided with the protruding portion side inclined surface 34 </ b> A and the opening side inclined surface 44 </ b> B that guide the protruding portion to the opening in both the protruding portion 30 and the opening forming portion 44. Therefore, when one cart 10 and the other cart are connected, only the upper coupling portion (lower coupling portion) of the other cart is brought close to the lower coupling portion 40 (upper coupling portion 30) of the one cart 10. The protrusion 30 is smoothly guided to the opening 44A side by the protrusion-side inclined surface 34A and the opening-side inclined surface 44B, and the protrusion 34 and the opening 44A are unevenly fitted. At this time, the protrusion 34 of the upper connecting portion 30 and the opening forming portion 44 of the lower connecting portion 40 come into contact with each other, so that the lower connecting portion 40 is pressed downward, and the lower connecting portion 40 rotates downward. To do. For this reason, the upper side connection part 30 and the lower side connection part 40 can be easily connected, without lifting up the one trolley | bogie 10 or the other trolley | bogie.

  Further, by simply pressing the lower connecting portion 40 downward, the lower connecting portion 40 rotates downward and the protruding portion 34 is detached from the opening 44A, so that the protruding portion 34 or the opening forming portion 44 is not directly touched. The connection between the upper connection part 30 and the lower connection part 40 can be released. Further, since both the upper connecting portion 30 and the lower connecting portion 40 are provided at a height that does not exceed the height of the loading platform surface 20A, the luggage 60 is located above the upper connecting portion 30 and the lower connecting portion 40. The baggage can be placed on the loading platform surface 20A in a state where a part of the bag protrudes. In this state, the upper connecting portion 30 and the lower connecting portion 40 can be connected and disconnected by rotating the lower connecting portion 40 downward. As described above, the cart 10 according to the present embodiment can be easily connected and disconnected with other carts, and can be connected and disconnected even when a part of the luggage 60 protrudes above the connecting portion. can do.

  Moreover, in the trolley | bogie 10 which concerns on this embodiment, the protrusion part 34 has 34 A of protrusion part side inclined surfaces which incline upward toward the outer side from the inner side of the carrier 20 with respect to the carrier surface 20A. And the opening formation part 44 has the opening side inclined surface 44B which inclines below toward the outer side from the inner side of the loading platform 20 with respect to the loading platform surface 20A. Furthermore, when the protrusion 34 is engaged with the protrusion 34, the protrusion-side inclined surface 34A and the opening-side inclined surface 44B are in contact with each other, and both the protrusion-side inclined surface 34A and the opening-side inclined surface 44B are on the outside. It is a bulging curved surface. With this configuration, when the protrusion 34 is guided into the opening 44A, the protrusion 34 is more smoothly moved toward the opening 44A due to the protrusion-side inclined surface 34A and the opening-side inclined surface 44B. Therefore, the upper connecting portion 30 and the lower connecting portion 40 can be more easily connected, and workability can be improved.

  Moreover, in the trolley | bogie 10 which concerns on this embodiment, the lower side connection part 40 has the connection cancellation | release part 46 provided below from the height of the loading platform surface 20A in the right-and-left both ends of the lower side connection part 40, respectively. Here, when a part of the load 60 placed on the loading platform surface 20A protrudes above the lower connection portion 40, the load 60 may be in the way, making it difficult to press the lower connection portion 40 downward. There is. According to the present embodiment, since the lower connecting portion 40 has the connection release portions 46 provided below the height of the loading platform surface 20A at the left and right ends of the lower coupling portion 40, the lower coupling portion 40 is mounted on the loading platform surface 20A. Even when a part of the placed luggage 60 protrudes above the lower connection part 40, the connection release part 46 is pressed downward so that the luggage 60 does not get in the way. The part 40 can be rotated downward, and workability can be improved.

  Further, in the cart 10 according to the present embodiment, the side roller 54 is provided on one side surface. Therefore, when a plurality of carts are arranged in the same direction without gaps in the front-rear direction and the left-right direction, When the desired cart is taken out from the cart, the carts adjacent in the left-right direction can move relatively smoothly by contacting the side roller 54 and the other side surface where the side roller 54 is not provided. When the side rollers 54 are attached to both sides of the carriage 10, the side rollers 54 interfere with each other, so that the relative movement of the two causes rattling and the work becomes difficult. Since the cart 10 of the embodiment can be relatively moved with a small force without rattling, workability can be improved.

<Other embodiments>
The present invention is not limited to the embodiments described above and with reference to the drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the above-described embodiment, the configuration in which the protruding portion is provided in the upper connecting portion and the opening forming portion is provided in the lower connecting portion is illustrated. However, the protruding portion is provided in the lower connecting portion and the upper connecting portion is provided. The structure in which the opening formation part was provided in the part may be sufficient.

(2) In the above-described embodiment, the configuration in which the cart is coupled in the front-rear direction is illustrated, but the upper coupling portion is provided at either the right end or the left end of the cart, and the lower coupling portion is disposed at the other. The structure which is provided and a trolley | bogie is connected in the left-right direction may be sufficient.

(3) In the above-described embodiment, the configuration in which the opening is a through hole is illustrated, but the shape of the opening is not limited. For example, the opening may have a concave shape that does not penetrate the connecting portion.

(4) In the above embodiment, the configuration in which the inclined surface is provided on both the projecting portion and the opening forming portion is exemplified, but the configuration in which the inclined surface is provided only on one side may be employed.

(5) In the above embodiment, the configuration in which the lower connecting portion is pivotable downward by being attached to the loading platform by the mounting spring is exemplified. However, the lower coupling portion can be pivoted downward. The configuration for doing this is not limited.

(6) In the above embodiment, the configuration in which the protruding portion side inclined surface and the opening side inclined surface are both curved outward is illustrated, but at least one of the protruding portion side inclined surface and the opening side inclined surface is exemplified. May be a flat surface.

(7) In the above-described embodiment, the configuration in which the connection release portion is provided in the lower connection portion is illustrated, but the configuration in which the connection release portion is not provided in the lower connection portion may be employed. In this case, what is necessary is just the structure by which the connection of an upper side connection part and a lower side connection part is cancelled | released by pressing down any site | part of a lower side connection part.

(8) In the above embodiment, the configuration in which the side roller is provided on one side surface of the loading platform is illustrated, but a configuration in which the side roller is not provided may be used.

(9) In the above embodiment, the cart in which the inside of the loading platform is hollow is illustrated, but the inside of the loading platform may be solid.

  As mentioned above, although embodiment of this invention was described in detail, these are only illustrations and do not limit a claim. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.

  DESCRIPTION OF SYMBOLS 10,110 ... Cart, 20, 120 ... Loading platform, 20A, 120A ... Loading platform surface, 22 ... Storage recess, 24 ... Holding hole, 26 ... Non-slip rib, 30, 130 ... Upper connecting portion, 32, 132 ... Plate-like portion , 32A, 132A ... (plate-like part) upper surface, 34, 134 ... projecting part, 34A, 134A ... projecting part side inclined surface, 40 ... lower connecting part, 42 ... mounting part, 42A ... (of mounting part) ) Upper surface, 44 ... opening forming portion, 44A ... opening, 44B ... opening-side inclined surface, 46 ... disconnection portion, 50, 150 ... universal wheel, 52 ... mounting spring, 54 ... side roller, 60 ... luggage

Claims (4)

A rectangular cargo bed whose upper surface is a cargo bed surface;
An upper connecting portion provided at a height not exceeding the height of the loading platform surface at one end of the loading platform;
The other end of the loading platform opposite to the one end is provided at a height not exceeding the height of the loading platform surface, and at least a part of the loading platform overlaps the lower side of the upper coupling portion. A lower connecting portion to be connected;
Protruding portions that are provided on one of the upper connecting portion and the lower connecting portion and protrude with respect to the cargo bed surface,
An opening forming portion that is provided on one of the upper connecting portion and the lower connecting portion, and has an opening that connects the upper connecting portion and the lower connecting portion by engaging the protrusion with the protrusions; With
At least one of the projecting part and the opening forming part is provided with an inclined surface for guiding the projecting part to the opening,
The lower connecting portion is rotated downward about a boundary portion with the cargo bed by being pressed downward,
Trolley. The cart according to claim 1,
The protruding portion has a protruding portion-side inclined surface that is inclined upward from the inside to the outside of the loading platform with respect to the loading platform surface.
The opening forming portion has an opening-side inclined surface that is inclined downward from the inside to the outside of the loading platform surface with respect to the loading platform surface. And the opening-side inclined surface are in contact with each other,
At least one of the protruding portion side inclined surface and the opening side inclined surface is a curved surface bulging outward,
Trolley. A cart according to claim 1 or claim 2, wherein
The lower connection portion has a connection release portion provided below the height of the cargo bed surface at the end of the lower connection portion.
Trolley. A rectangular first cargo bed portion having a cargo bed surface on the upper surface;
A rectangular second loading platform,
One short side portion of the first cargo bed portion and one end side portion of the second cargo bed portion are coupled, and the upper surface of the second cargo bed portion is parallel to the first cargo bed portion. A coupling portion for displacing the first posture and a second posture lower than the first posture;
A first connecting portion that is provided on the other side of the first cargo bed portion that is different from the one side, and has either a protruding portion or an opening on the lower surface;
The second cargo bed portion is provided on the side of the other edge portion different from the one edge side portion, and has one of the projecting portion and the opening on the upper surface side, and the second cargo bed portion is the first cargo bed portion. When in the posture, the other cart is connected to one of the projecting portion and the opening on the lower surface side of the first connecting portion in the other cart, and the other cart is in the second posture. A second connecting portion that releases the connection with the other carriage by being separated from any one of the projecting portion on the lower surface side of the first connecting portion and the opening;
Trolley.

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