JP2006096237A - Truck for carriage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a truck for carriage capable of deforming in three states of a flat state suitable for accumulation, an L shaped state suitable for temporary storage and a using state and restraining problems of occurrence of a damage caused by an engaging substrate part in folding it in the flat state and of lowering of folding efficiency to the minimum. <P>SOLUTION: This truck is furnished with a back panel, both left and right side panels connected to the back panel free to accumulate on it and a bottom panel connected to the back panel free to be folded on it. Additionally, lower end parts of the both left and right panels are constituted, and a supporting plate part to support both left and right ends of the bottom panel in opening the bottom panel in the rectangular direction against the back panel and the engaging substrate part to engage the bottom panel with the both left and right side panels in the state where the bottom panel is opened in the rectangular direction against the back panel. The engaging substrate part is set at a position not to project from an inside surface on the supporting plate on a lower end part of a free end part of the side panel. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a transport carriage that can be folded during transportation or storage.

The following Patent Document 1 is a transporting carriage that includes a bottom panel, left and right side panels, and a back panel, and is provided with moving wheels so as to be positioned at the four corners of the bottom panel, and is suitable for stacking by being folded into a flat shape. There is disclosed a transport carriage that can be deformed into three states: a state, a state that is folded in an L-shape and is movable on the floor surface, and a state of use. When stacking, fold them so that they overlap inside the back panel, and then fold the left and right panels to make the whole flat. Further, when only one side panel is folded so as to overlap the inside of the back panel, the whole can be brought into a state in which nesting of the planar shape L shape is possible. That is, it can be folded and stacked in a flat shape when transported or stored in a warehouse, and can be folded into an L shape when it is desired to temporarily store it while it is movable on the floor at the site of use.
JP 2002-284013 A

  When using the transport carriage, the left and right side panels and the bottom panel are opened at right angles to the back panel, and the bottom panel is supported and locked at the lower ends of the left and right side panels. In order to lock the bottom panel, a locking substrate portion is provided at the lower ends of the left and right side panels. However, when this transporting carriage is folded flat, there is a problem that the locking substrate part comes into contact with the lower end part of the back panel and the lower end part of the other side panel to cause scratches. Further, when flattening, there is a problem that the locking substrate portion becomes an obstacle and the side panel cannot be folded in parallel with the back panel, and the folding efficiency is lowered.

  The present invention has been made in the background as described above. In particular, the present invention can be transformed into three states: a flat state suitable for stacking, an L-shaped state suitable for temporary storage, and a use state. It is an object of the present invention to provide a transport carriage that can minimize problems such as scratches caused by the locking substrate portion when folded in a folded state and a decrease in folding efficiency.

Means for Solving the Problems and Effects of the Invention

In order to solve the above-mentioned problem, the transportation carriage of the present invention is
Back panel,
Left and right side panels connected to both sides of the back panel so as to be foldable with respect to the back panel;
A bottom panel connected to the lower end of the back panel so as to be foldable with respect to the back panel;
The support plate portion that supports the left and right ends of the bottom panel when the bottom panel is opened in a direction perpendicular to the back panel, while configuring the lower ends of the left and right side panels,
A wheel mounting board portion for the back panel installed at the lower ends of the left and right ends of the back panel;
Side panel wheel mounting board installed at the lower end of the free end of the left and right side panels;
A wheel attached to the lower side of the rear panel wheel mounting board part and the side panel wheel mounting board part;
In order to lock the bottom panel to the left and right side panels in a state of being opened in a direction perpendicular to the back panel, a locking base plate portion installed on the support plate portion at the free ends of the left and right side panels; ,
And the locking substrate portion is installed at a position that does not protrude from the inner surface of the support plate portion.

The left and right side panels are pivotally connected to the back panel by a hinge, the hinge of one side panel is located at a close distance to the back panel, and the hinge of the other side panel is the back panel. By being located at a distance away from the panel, the bottom panel, the one side panel, and the other side panel are folded substantially in parallel in this order inside the back panel,
Since the locking substrate portion does not protrude from the inner side surface of the support plate portion, when folded, the support plate portion of the one side panel and the lower end portion of the back panel are substantially evenly contacted, And the said support plate part of said other side panel and the said support plate part of said one side panel contact substantially equally.

In addition, the transport carriage of the present invention is provided with a fixing means that can be fixed and released so that at least one of the left and right side panels is fixed to the back panel so that it cannot be folded.
The fixing means includes a vertical through hole formed in the support plate portion of the side panel, a vertical screw hole formed in the wheel mounting substrate portion for the back panel, and the through hole. A bolt that is screwed into the screw hole,
The bolt includes a bolt head portion and a shaft portion, and the shaft portion is a screw region in which a screw thread is formed on the tip end side of the shaft portion and a connection side between the bolt head and the screw head is not formed. A screw region,
The diameter of the through hole is larger than the diameter of the shaft portion in the non-screw region,
The length of the non-screw region in the axial direction is longer than the thickness of the support plate portion, and the bolt is screwed so that the bolt head does not tighten the support plate portion.

  In addition, when the plurality of transport carts are stacked in a state where the floor panel and the left and right side panels are folded with respect to the back panel, each transport cart is prevented from shifting in the horizontal direction. A shift prevention portion is formed on the wheel mounting substrate portion.

Further, in the transport carriage according to the present invention, the direction parallel to the bottom side of the back panel in a state where a plurality of the transport carriages are stacked is the X direction, and the direction parallel to both sides of the back panel is the Y direction. If
The back panel wheel mounting substrate portion overlaps at the corresponding positions in the upper and lower positions in the stacked state, and in the stacked state, a first engagement portion is formed at the upper end of the back panel wheel mounting substrate portion, And a second engagement portion engageable with the first engagement portion is formed at the lower end portion,
When the plurality of transfer carts are stacked, the first engagement portion of the upper end portion of the back panel wheel mounting substrate portion and the lower end portion of the lower end portion of the transfer cart adjacent vertically. The second engaging portion is engaged to prevent the displacement in at least one direction of the X direction and the Y direction.

The best mode for carrying out the present invention will be described below with reference to the drawings.
In FIG. 1, 1 is a rectangular bottom panel, 2 and 3 are a pair of left and right side panels, and 5 is a connecting bar. Wheels 6a to 6d are provided below the four corners of the bottom panel 1, and the floor is used as a transportation carriage. The use state which can move on the surface is shown.

  The peripheral panels 2 to 4 except for the bottom panel 1 have the same configuration, and each has an angle member 7 as a lower end portion, and a gate in which pipe material is processed into a gate shape and both ends are fixed to both ends of the angle member 7. A frame member 8, a plurality of upper and lower horizontal rail members 9 a erected at appropriate intervals between the vertical column portions 8 a and 8 b of the portal frame member 8, and an upper end horizontal frame portion 8 c of the portal frame member 8. And the angle member 1 are composed of a plurality of vertical bars 9b installed at appropriate intervals.

  More specifically, as shown in FIG. 2 to FIG. 5 and FIG. 8, the rear panel wheel mounted by welding another plate material to the lower surface of the angle member 7 at the lower left and right ends of the back panel 4. Substrate portions 10c and 10d are provided, and side panel wheel mounting substrate portions 10a and 10b are similarly provided at lower ends of the free ends of the left and right side panels 2 and 3, respectively. Each wheel mounting board | substrate part 10a-10d protrudes inside the rectangular space comprised by each panel 2-4, and the said wheel (caster) 6a-6d is attached to the lower side of these wheel mounting board | substrate parts 10a-10d. It has been.

  The angle member 7 has, for example, a vertical plate portion VP and a horizontal plate portion HP as shown in the cross-sectional view of FIG. 3B. The vertical plate portion VP is parallel to the side surfaces of the panels 2 to 4, and the horizontal plate portion. HP is positioned so as to be parallel to the bottom surfaces of the panels 2 to 4. Hinges 11a and 11b are installed on the horizontal plate portion HP of the angle member 7 of the back panel 4, and the bottom panel 1 is connected to be swingable up and down by the hinges. Further, the horizontal plate portion HP of the angle member 7 of the side panels 2 and 3 functions as a support plate portion 71 that supports the left and right ends of the bottom panel 1 when the bottom panel 1 is opened in a direction perpendicular to the back panel 4. .

  As shown in the sectional view of FIG. 8, both hinges 11 a and 11 b are fixed to the support shaft 12 having one end fixed to the horizontal plate HP of the angle member 7 of the back panel 4 and the rear side of the bottom panel 1. And a fitting member 13 that is fitted onto the support shaft 12. When the bottom panel 1 is laid down at a right angle to the back panel 4, the rear side of the bottom panel 1 is supported by the horizontal plate portion HP of the angle member 7 of the back panel 4.

  Further, as shown in FIGS. 2 and 3A, vertical support shafts 14 and 15 are provided on the outer side of the rear panel wheel mounting board portions 10c and 10d. The rear ends of the lower sides of the panels 2 and 3, that is, the rear end of the support plate 71, and the concentric position with the vertical column 8b of the side panels 2 and 3 are supported so as to be horizontally swingable. As shown in FIG. 3 (A), the bottom panel 1 is rotated upward about the hinges 11a and 11b and folded so as to overlap the inside of the back panel 4, and the side panel 2 is centered on the vertical support shaft 14. And the side panel 3 can be folded so as to be overlapped by rotating around the vertical support shaft 15 around the inside of the back panel 4 (the outside of the folded bottom panel 1). The vertical support shaft 14 that supports the side panel 2 is located close to the back panel 4, and the vertical support shaft 15 that supports the side panel 3 is positioned away from the back panel 4. Thus, when the bottom panel 1 and the left and right side panels 2 and 3 are folded with respect to the back panel 4, the panels 1 to 4 can be folded so as to be substantially parallel. When folded in this way, the side panel wheel mounting board portion 10a enters the lower side of the back panel 4, and the side panel wheel mounting board portion 10b enters the lower side of the side panel 2 and the back panel 4. become.

  3B is a cross-sectional view at the position of the arrow in FIG. 3A, and FIG. 3C is an enlarged view of a main part of FIG. Thus, in the flat state, the support plate portion 71 of the side panel 2 is in contact with the angle member 7 of the back panel 4, and the support plate portion 71 of the side panel 3 is in contact with the support plate portion 71 of the side panel 2. Locking substrate portions 21a and 21b, which will be described later, are installed on the support plate portions 71 of the side panels 2 and 3 at positions that do not protrude from the inner side surface of the support plate portion 71. More specifically, a cutout is formed in the support plate portion 71 and the side panel wheel mounting substrate portions 10a and 10b, and the locking substrate portions 21a and 21b are inserted into the cutouts from the inner surface of the support plate portion 71. It does not protrude. In this way, in the flat state, the angle member 7 of the back panel 4 and the support plate portion 71 of the side panel 2 can be contacted substantially evenly, and the support plate portion 71 of the side panel 2 and the support plate portion 71 of the side panel 3 are substantially the same. You can touch evenly. Here, substantially contacting means that local stress due to the protruding support plate 71 does not occur. In the conventional cart, as shown in FIG. 13, the locking substrate portions 21 a and 21 b are arranged at positions where they protrude from the inner side surface of the support plate portion 71. Therefore, when each of the side panels 2 and 3 is folded into a flat state, the locking substrate portion 21a comes into contact with the angle member 7 of the back panel 4, and the locking substrate portion 21b contacts the support plate portion 71 of the side panel 2. In order to contact, the contact | abutting part generate | occur | produced a damage | wound, and the latching board parts 21a and 21b interfered, and the problem that each panel 2-4 could not be folded in parallel had arisen. In the present invention, since the locking substrate portions 21a and 21b are provided at positions that do not protrude from the inner side surface of the support plate portion 71, the entire inner side surfaces of the support plates 71 of the side panels 2 and 3 are in contact with each other. Can be solved.

  As described above, when notches are formed in the support plate portion 71 and the side panel wheel mounting substrate portions 10a and 10b, two distinct effects can be obtained separately when the carriage is manufactured. The first effect is that a high strength can be obtained even if the welding length is reduced because the locking substrate portions 21a and 21b are inserted into the notches. The second effect is that the side panel wheel mounting substrate portions 10a and 10b can be welded after moving along the notches in a state where the locking substrate portions 21a and 21b are fixed to the support plate portion 71. It is easy to adjust the position of the panel wheel mounting board portions 10a and 10b.

  Next, a method for fixing one side panel 2 to the back panel 4 will be described. As shown in FIG. 2, the side panel 2 can be fixed to the back panel 4 by the fixing means 16 in a state where the side panel 2 is rotated about the vertical support shaft 14 to a right angle with respect to the back panel 4. As shown in FIG. 8 (A), the fixing means 16 is provided on the back panel wheel mounting board portion 10c at a position overlapping the support plate portion 71 of the side panel 2 in a posture perpendicular to the back panel 4. The vertical screw hole 17, the vertical through hole 18 provided in the support plate portion 71 of the side panel 2 so as to coincide with the vertical screw hole 17, and the bolt 19 that can be screwed into the screw hole 17 through the through hole 18. It consists of and.

  The bolt 19 has a bolt head portion 19a and a shaft portion as shown in an enlarged view of the main part of FIG. 8B. The shaft portion includes a screw region 19c having a thread formed on the tip end side of the shaft portion, and a bolt. It has a non-screw region 19b in which no thread is formed on the connection side with the head 19a. Further, the diameter of the through hole 18 is made larger than the diameter of the shaft portion in the non-screw region 19 b, and the axial length of the non-screw region 19 b is made longer than the thickness of the support plate portion 71. By using the bolt 19 having such a structure, the bolt head 19a can be screwed so as not to tighten the support plate 71, and the vertical stress applied to the bolt can be relieved. Further, since the diameter of the through hole 18 is larger than the diameter of the shaft portion of the non-screw region 19b, the horizontal stress applied to the bolt can be relieved and the bolt 19 can be easily attached. On the other hand, in conventional bolts (bolts having a thread formed on the entire shaft portion and having no non-threaded portion 19b), when the horizontal stress is applied to the bolt, the thread hits the inner peripheral surface of the through hole 18 and is crushed. There was a problem. However, in the present invention, since the non-screw region 19b is located in the through hole 18, even if a horizontal stress is applied to the bolt, there is no problem that the screw thread is crushed.

  Next, the locking means 20a and 20b for locking the bottom panel 1 will be described. The left and right side panels 2 and 3 are opened at right angles to the back panel 4 as shown in FIG. 2, and the side panel 2 is fixed to the back panel 4 side by the fixing means 16 in its posture so as to overlap the back panel 4. The folded bottom panel 1 can be rotated forward to a horizontal posture, and the left and right sides of the bottom panel 1 can be supported by the support plate portions 71 of the side panels 2 and 3 (the horizontal plate portion HP of the angle member 7). . The locking means 20a and 20b are for locking the bottom panel 1 in this state.

  The locking means 20a and 20b have the same structure and are symmetrically configured, and the locking means 20a on the side panel 2 side shown in FIGS. 5 and 6 will be described as an example. A locking substrate portion 21a installed in the plate portion 71, and a horizontal through hole 23 provided in the side wall portion 1a of the bottom panel 1 so as to be adjacent to the locked hole 22 provided in the locking substrate portion 21a. The locking plate 24 is concentrically supported on the bottom portion of the bottom panel 1 at a position inside the locking substrate portion 21a. As described above, the support plate portion 71 and the side panel wheel mounting substrate portion 10a are notched, and the locking substrate portion 21a is inserted into the notch so that the locking substrate portion 21a is supported by the support plate. It is installed at a position that does not protrude from the inner surface of the portion 71. The locking rod 24 is formed in a pair of left and right through-supporting holes 26a and 26b provided in a locking rod support member 25 using a grooved material fixed to the bottom of the bottom panel 1 in the axial direction (horizontal direction). It is supported so as to be laterally movable, and an operation handle 27 is connected to the inner end at a right angle, and stoppers 28a and 28b are projected so as to be adjacent to the outer sides of the through support holes 26a and 26b. .

  In this way, with the left and right sides of the bottom panel 1 being supported by the support plate portions 71 of the side panels 2 and 3, the locking rods 24 on the bottom panel 1 side are connected to the locking substrate portions 21 on the side panels 2 and 3 side. The upper movement of the bottom panel 1 is prevented by penetrating through the locked hole 22 and the horizontal through hole 23 on the bottom panel 1 side. That is, the bottom panel 1 is locked. At this time, the side panel 3 which is not fixed to the back panel 4 has a vertical support shaft in a direction away from the bottom panel 1 because the locking substrate portion 21b on the side panel 3 side enters the inside of the bottom panel 1. It does not rotate around 15. That is, the side panels 2 and 3 are fixed at positions adjacent to the left and right sides of the bottom panel 1.

  Thus, in the state where the locking means 20a and 20b lock the bottom panel 1, the operation handle portion 27 of the locking rod 24 is suspended by gravity, and in this state, the stoppers 28a and 28b are locked by the locking rod. Adjacent to the left and right outer surfaces of the support member 25, the locking rod 24 is locked so as not to move. When the lock is released and the bottom panel 1 is moved up and folded, the operation handle 27 is rotated by a predetermined angle. As a result, the stopper 28a is adjacent to a notch for unlocking (not shown) connected to the through-supporting hole 26a, so that the latching rod 24 is moved inward, and the latching on the side panels 2 and 3 side is performed. The bottom panel 1 can be unlocked by being detached from the locked hole 22 of the substrate portion 21a. It is to be noted that the locking rod 24 is prevented from being detached from the through bearing hole 26a by the stopper 28a coming into contact with the inner side surface of the locking support member 25 on the through bearing hole 26b side. In addition, a notch 29 for allowing the stoppers 28a and 28b to pass therethrough is also provided on the through bearing hole 26b side at a position directly below.

  The left and right side panels 2 and 3 are supported at their lower ends by the vertical support shafts 14 and 15 so as to be horizontally swingable with respect to the back panel 4, and at the same time, as shown in FIG. It is supported on the left and right sides of the back panel 4 by 30a, 30b and 31a, 31b. As shown in FIG. 7, all these hinges 30 a to 31 b sandwich the gate-shaped frame member vertical column parts 8 a and 8 b of the back panel 4 between the rear clamping parts 32 b and 33 b and between the front clamping parts 32 a and 33 a. The side panels 2 and 3 are constituted by a pair of clamping members 32 and 33 that clamp the gate-shaped frame member vertical column portion 8b, and a bolt nut 34 that fastens the both clamping members 32 and 33 to each other. In order to determine the position of the vertical frame member vertical support 8b, which is the center of swinging of the three, the rear holding part 32b of one holding member 32 of the pair of holding members 32, 33 is formed by welding or the like. Means fixed to the gate-shaped frame material vertical column portions 8a, 8b on the back panel 4 side, and the gate-shaped frame material vertical column portions 8b on the side panels 2, 3 side are connected to the front-side clamping portions 32a, It is configured to be able to rotate between 33a . The hinges 30a, 30b on the side panel 2 side and the hinges 31a (see FIG. 1), 31b on the side panel 3 side have the same configuration, but the hinges 31a, 31b on the side panel 3 side are the side panel 2. The distance between the front and rear holding portions 33a and 33b is larger than that of the side hinges 30a and 30b.

  As shown in FIG. 1 (b), the connecting bar 5 that connects the free ends of the side panels 2 and 3 is connected to the support member 42 attached to the vertical frame member 8a of the side frame 2 at one end. The hook is detachably supported with respect to the vertical cylindrical locked portion 43a of the locked member 43 attached to the other side panel 3 at the other end portion of the connecting bar 5 so as to be freely movable. The part 5a is bent. When the side panels 2 and 3 are folded, the hook portion 5a is detached from the vertical cylindrical locked portion 43a and the connecting bar 5 is suspended from the support member 42. When the side panels 2 and 3 are opened, the connecting bar 5 is lifted and the hook portion 5a is fitted and locked to the vertical cylindrical locked portion 43a to connect the side panels 2 and 3 to each other. Can do.

  When using the transporting carriage having the above-described configuration, as shown in FIGS. 1 and 2, the left and right side panels 2 and 3 are opened to a right angle forward with respect to the back panel 4, and in this state, one side panel 2 is The bolts 19 of the fixing means 16 are fixed to the back panel 4 side, and then the bottom panel 1 is tilted forward and downward, and the left and right sides thereof are supported by the support plate portions 71 of the side panels 2 and 3. At this time, since the locking substrate portions 21a and 21b enter inside the left and right side wall portions 1a of the bottom panel 1, the locking rod 24 is moved outward in this state, and the bottom panel 1 is engaged with the side panels 2 and 3. Stop.

  As shown in FIG. 4, when the unused cart is stored in a nesting state on the floor surface, the locking rod 24 is moved inward to release the locking of the bottom panel 1, and then the bottom panel 1 is moved back. Fold it up so that it overlaps the inside of the panel 4. Then, the side panel 2 fixed to the back panel 4 by the fixing means 16 is left as it is, and the unfixed side panel 3 is overlapped on the inside of the back panel 4 (outside of the standing bottom panel 1). Fold it up. In this way, by deforming the carriage into an L shape in plan view, as shown in phantom lines in FIG. 4, a plurality of similarly modified carriages are nested in a nested manner, and the wheels 6a to 6d are It can be stored in a state where it can be used and moved on the floor.

  When the carriage is transported or stored in a warehouse, as shown in FIG. 3, the bottom panel 1 is folded inside the back panel 4 as described above, and the bolts 19 of the fixing means 16 are removed to the side. After the panel 2 is released, the side panel 2 is folded so as to overlap the inner side of the back panel 4 (outside of the standing bottom panel 1), and then the side panel 3 is folded so as to overlap the outer side of the side panel 2.

  Next, a case where a plurality of folded carts are stacked will be described with reference to FIG. FIGS. 9A and 9C are side views, and FIG. 9B is a plan view of the wheel mounting board portions 10a to 10d and the angle member 7 as viewed from the directions of the panels 2 to 4. FIG. After the transport carriage is flattened, when a plurality of stacks are made with the back panel 4 facing downward as shown in FIG. 9, the positions corresponding to the top and bottom of the back panel wheel mounting board portions 10c and 10d are overlapped. Yes. In the present invention, this overlapping portion is used as a shift prevention unit for preventing a horizontal shift. Specifically, a first engagement portion is formed at the upper end of the rear panel wheel mounting board portions 10c and 10d, and the second engagement is engageable with the first engagement portion at the lower end. The part is formed. Here, when the direction parallel to the bottom side of the back panel 4 is the X direction and the direction parallel to the both sides of the back panel 4 is the Y direction, the wheel mounting board for the back panel when a plurality of carriages are stacked. The first engaging portion at the upper end portion of the portions 10c and 10d and the second engaging portion at the lower end portion of the transport carriage adjacent vertically are engaged with each other in at least one direction of the X direction and the Y direction. Deviation can be prevented.

  Conventionally, when a carriage is transported using a ship or a vehicle, there has been a problem that the piled trucks are displaced in the horizontal direction due to vibrations and fall down or become damaged. However, the occurrence of the above-mentioned problem can be prevented by forming the slip prevention portion on the back panel wheel mounting substrate portions 10c and 10d. The present invention is characterized in that the shift preventing portion is provided by devising the shape of the back panel wheel mounting substrate portions 10c, 10c. According to the present invention, these substrates are used when using the carriage. The parts 10c and 10d can be used as wheel mounting plates, and can be used as misalignment prevention parts during transportation.

  Next, with reference to FIGS. 10A to 10C, the back panel wheel mounting board portion 10 c will be described in detail. The back panel wheel mounting board portion 10c has a board body 40, and the angle member 7 of the back panel 4 is welded to the lower end portion in the stacked state. The substrate body 40 is formed by bending a sheet metal so as to have two grooves, and includes side walls SW1 to SW4, a bottom surface BP, and an upper surface TF that connects the side walls SW2 and SW3. Another plate member 41 is welded to one groove, and the plate member 41 has a surface that is substantially the same height as the upper surface TF of the substrate body, and a part of the plate member 41 protrudes in the vertical direction (stacking direction) to project the first convex portion 36a. I am doing. Moreover, the 1st recessed part 36b which can be engaged with the 1st convex part 36a is formed in the lower side edge part. The first recess 36 b is configured to be surrounded by the side walls SW 1 and SW 2 and the bottom surface BP of the substrate body 40 and the angle member 7. When the first convex portion 36a and the first concave portion 36b are engaged, both ends of the first convex portion 36a are sandwiched between the side walls SW1 and SW2, and thus do not shift in the X direction. On the other hand, with respect to the Y direction, since the distance between the angle member 7 and the bottom surface BP is wider than the thickness of the first convex portion 36a, it can move in the Y direction. By using the first convex portion 36a and the first concave portion 36b described above as the position shift prevention portion, it is possible to prevent the shift in the X direction when a plurality of transport carts are stacked.

  Further, the rear panel wheel mounting board portion 10c is formed with a second convex portion 37a protruding in the vertical direction (stacking direction) at the upper end portion, and can be engaged with the second convex portion 37a at the lower end portion. A second recess 37b is formed. The second convex portion 37a is such that the upper surface TF of the substrate body 40 protrudes in the stacking direction, and a tapered region 39 that forms a slope with respect to the stacking direction is formed. The taper region 39 is for facilitating engagement of the second convex portion 37a and the second concave portion 37b in the stacking operation. The second concave portion 37b is formed by cutting out a part of the upper surface TF of the substrate body 40, and when engaged, the angle member 7 of the back panel 4 and the side walls SW2 and SW3 sandwich the second convex portion 37a. The shape does not shift in the direction. With respect to the X direction, it can slide in the second convex portion 37a and the second concave portion 37b. That is, when only the 2nd convex part 37a and the 2nd recessed part 37b are engaged, it is set as the shape which can slide to a X direction. By using the second convex portion 37a and the second concave portion 37b as the position shift prevention portion, the position can be fixed in the Y direction while sliding in the X direction.

  FIG. 11 is a side view of the back panel wheel mounting board 10c in a stacked state, and FIG. 12 is a plan view seen from the panel 2-4 side. As shown in these figures, the first convex portion 36a and the first concave portion 36b can prevent the positional deviation in the X direction, and the second convex portion 37a and the second concave portion 37b can prevent the positional deviation in the Y direction. Therefore, the position does not shift in both the X direction and the Y direction. As described above, by separating the X-direction displacement prevention portion and the Y-direction displacement prevention portion, the stress applied to each displacement prevention portion can be dispersed. Further, in the stacking operation, when engaging the shift preventing portion, either one of the first convex portion 36a or the second convex portion 37a is engaged first, and then the other convex portion is engaged. Therefore, it can be engaged in two stages, and stacking work becomes easy. 10-12, each convex part 36a, 37a was formed in the upper side edge part, However, You may form these convex parts in a lower side edge part.

  Of the two rear panel wheel mounting board parts, the board part 10c on the side panel 2 side can adopt the structure described above. As shown in FIG. 9B, the other back panel wheel mounting board portion 10d is not formed with the first convex portion 36a, but only the second convex portion 37a. Thereby, in the stacking operation, it is only necessary to engage the first convex portion 36a only on the side of the rear panel wheel mounting substrate portion 10c, and the working efficiency can be improved.

  On the other hand, as shown in FIGS. 10 and 12, a screw hole 17 is formed in the first convex portion 36a. As described above, the screw hole 17 is used for screwing the bolt 19 to fix the side panel 2. When a force is applied to the free end of the side panel 2, a large stress is applied to the bolt 19. There is a problem that adds. Therefore, when the screw hole 17 is formed in the first convex portion 36a as shown in FIGS. 10 and 12, the distance between the vertical support shaft 14 and the screw hole 17 can be increased, and the stress applied to the bolt 17 can be reduced. it can. By adopting such a structure, the first convex portion 36a can be used as the formation portion of the screw hole 17 when using the carriage, and it can be used as a position misalignment prevention section in the X direction when the carriage is transported. Is possible.

  As described above, the transportation carriage of the present invention can be deformed into three states: a flat state suitable for stacking, an L-shaped state suitable for temporary storage, and a use state, and the bottom panel 1 is Since the locking substrate portions 21a and 21b for locking the both side panels 2 and 3 are installed at positions that do not protrude from the inner side surface of the support plate portion 71 of the side panels 2 and 3, The locking substrate portion 21a does not contact the angle member forming the lower end portion of the back panel 4, and the locking substrate portion 21b does not contact the support plate portion 71 of the side panel 3. It becomes possible to solve problems such as a decrease in efficiency.

  Further, in the use state and the L-shaped state, the shape of the bolt 19 used for the fixing means 16 of the side panel 2 is devised, and the non-screw region 19b is formed in the portion that contacts the inner peripheral surface of the through hole 18. So the thread will not be damaged. Moreover, since the through-hole 18 is made larger than a shaft part diameter, it becomes easy to attach the bolt 19. Further, since the axial length of the non-screw region 19b is longer than the thickness of the indicator plate portion 71, the bolt head portion 19a can be screwed so as not to tighten the support plate portion 71.

  On the other hand, when a plurality of carriages are stacked for truck transportation or ship transportation, the position shift prevention portions formed on the back panel wheel mounting board portions 10c and 10d overlap each other at positions corresponding to the top and bottom, and the horizontal direction Can be prevented. As a result, the transported carts will not fall over or be damaged during transportation, and the economic effect is enormous.

FIG. 4A is a right end view, FIG. B is a front end view, FIG. C is a left end view, FIG. D is a plan view, and FIG. E is a rear end view. It is a top view in the state where the bottom panel of the left half of the conveyance trolley | bogie in use condition was omitted. FIG. A is a plan view of a state where the carriage is folded flat, B is a cross-sectional view, and FIG. C is an enlarged view of the main part of FIG. It is a top view in the state where the trolley for conveyance was folded in the L shape. It is a partially notched top view of the left half of the conveyance trolley | bogie in use condition. A is a transverse side view of the locking means of the bottom panel, B is a longitudinal side view, and C is a plan view. Fig. A is an exploded transverse plan view of the hinge, and Fig. B is a side view. Fig. A is a longitudinal side view for explaining the fixing means of the side panel, and Fig. B is an enlarged view of the main part. Fig. A is a left side view of a state in which a plurality of carriages are stacked, Fig. B is a plan view seen from each panel side, and Fig. C is a right side view. A is an enlarged plan view of the wheel mounting board portion 10c for the back panel, B is a cross-sectional view, and C is a perspective view. Fig. 9C is an enlarged view of the main part. 9B is an enlarged view of the main part of FIG. Conventional example corresponding to FIG. 3C

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bottom panel 2,3 A pair of left and right side panels 4 Back panel 5 Connection bar 6a-6d Wheel 10a, 10b Wheel mounting board | substrate part 10c, 10d for rear panels Wheel mounting board | substrate parts 11a, 11b for rear panels Hinge 14 for bottom panels, 15 Side panel vertical support shaft 16 Side panel fixing means 17 Vertical screw hole 18 Vertical through hole 19 Bolt 21 Locking substrate portion 22 Locked hole 23 Horizontal through hole 24 Locking rods 30a to 31b Side panel hinge 36a No. One convex portion 36b First concave portion 37a Second convex portion 37b Second concave portion 38 Wheel mounting hole

Claims (13)

Back panel,
Left and right side panels connected to both sides of the back panel so as to be foldable with respect to the back panel;
A bottom panel connected to the lower end of the back panel so as to be foldable with respect to the back panel;
The support plate portion that supports the left and right ends of the bottom panel when the bottom panel is opened in a direction perpendicular to the back panel, while configuring the lower ends of the left and right side panels,
A wheel mounting board portion for the back panel installed at the lower ends of the left and right ends of the back panel;
Side panel wheel mounting board installed at the lower end of the free end of the left and right side panels;
A wheel attached to the lower side of the rear panel wheel mounting board part and the side panel wheel mounting board part;
In order to lock the bottom panel to the left and right side panels in a state of being opened in a direction perpendicular to the back panel, a locking base plate portion installed on the support plate portion at the free ends of the left and right side panels; ,
And the locking substrate part is installed at a position that does not protrude from the inner surface of the support plate part.   2. The transport carriage according to claim 1, wherein a cutout is formed in the support plate portion and the side panel wheel mounting substrate portion, and the locking substrate portion is inserted into the cutout.   The transport carriage according to claim 1, further comprising a fixing unit that can be fixed and released so that at least one of the left and right side panels is fixed to the back panel so as not to be folded. The left and right side panels are pivotally connected to the back panel by a hinge, the hinge of one side panel is located at a close distance to the back panel, and the hinge of the other side panel is connected to the back panel By being located at a far distance, the bottom panel, the one side panel, and the other side panel are folded substantially in parallel in this order on the inner side of the back panel,
Since the locking substrate portion does not protrude from the inner side surface of the support plate portion, when folded, the support plate portion of the one side panel and the lower end portion of the back panel are substantially evenly contacted, 2. The transport carriage according to claim 1, wherein the support plate portion of the other side panel and the support plate portion of the one side panel are substantially in contact with each other. The fixing means includes a vertical through hole formed in the support plate portion of the side panel, a vertical screw hole formed in the back panel wheel mounting substrate portion, and the screw passing through the through hole. A bolt that is screwed into the hole,
The bolt includes a bolt head portion and a shaft portion, and the shaft portion is a screw region in which a screw thread is formed on the tip end side of the shaft portion and a connection side between the bolt head and the screw head is not formed. A screw region,
The diameter of the through hole is larger than the diameter of the shaft portion in the non-screw region,
The axial length of the non-screw region is longer than the thickness of the support plate portion, and the bolt is screwed so that the bolt head does not tighten the support plate portion. Carriage for transportation.   The back panel wheels are attached so that the transport carts do not shift in the horizontal direction when a plurality of transport carts are stacked while the floor panel and the left and right side panels are folded with respect to the back panel. The carriage for transfer according to any one of claims 1 to 5, wherein a shift prevention portion is formed on the substrate portion. When a plurality of transport carts are stacked, the direction parallel to the bottom side of the back panel is the X direction, and the direction parallel to both sides of the back panel is the Y direction.
The back panel wheel mounting substrate portion overlaps at the corresponding positions in the upper and lower positions in the stacked state, and in the stacked state, a first engagement portion is formed at the upper end of the back panel wheel mounting substrate portion, And a second engagement portion engageable with the first engagement portion is formed at the lower end portion,
When the plurality of transfer carts are stacked, the first engagement portion of the upper end portion of the back panel wheel mounting substrate portion and the lower end portion of the lower end portion of the transfer cart adjacent vertically. The conveyance carriage according to claim 6, wherein the carriage is engaged with a second engagement portion to prevent displacement in at least one direction of the X direction and the Y direction. A first convex portion protruding in the vertical direction in the stacked state is formed at one of the upper end portion and the lower end portion, and the other end portion can be engaged with the first convex portion. A first recess that can prevent the displacement in the X direction is formed,
When the plurality of transfer carriages are stacked, the first convex portion of the back panel wheel mounting substrate portion and the first concave portion of the transfer carriage adjacent vertically are engaged, and the X The conveyance cart according to claim 7, which prevents a deviation in direction. A second convex portion projecting in the vertical direction in the stacked state is formed at one of the upper end portion and the lower end portion, and the other convex portion can be engaged with the second convex portion. A second recess that can prevent the displacement in the Y direction is formed,
When the plurality of transfer carts are stacked, the second convex portion of the back panel wheel mounting substrate portion engages with the second concave portion of the transfer cart adjacent vertically, and the Y The conveyance cart according to claim 7, which prevents a deviation in direction. A first convex portion protruding in the vertical direction in the stacked state is formed at one of the upper end portion and the lower end portion, and the other end portion can be engaged with the first convex portion. A first recess that can prevent the displacement in the X direction is formed,
A second protrusion that protrudes in the up-down direction is formed at the one end, and a second protrusion that can be engaged with the second protrusion and can prevent displacement in the Y direction at the other end. A recess is formed,
When the plurality of transfer carts are stacked, the first convex portion of the back panel wheel mounting substrate portion and the first concave portion of the transport cart adjacent vertically are engaged with each other in the X direction. And the second convex portion of the wheel mounting board portion for the back panel and the second concave portion of the transport carriage adjacent vertically are engaged to prevent the deviation in the Y direction. The conveyance cart according to claim 7.   The second convex portion and the second concave portion are slidable in the X direction within the second convex portion and the second concave portion in an engaged state, and are inclined with respect to the vertical direction. The carriage for transportation according to claim 9 or 10, wherein a tapered region is formed.   The conveyance carriage according to claim 8, wherein the screw hole is formed in the first convex portion of the wheel mounting substrate portion for the back panel.   2. The transport carriage according to claim 1, wherein lower end portions of the left and right side panels are made of an angle material, and a horizontal plate portion of the angle material constitutes the support plate portion.

Images