JP4381320B2 - Foldable cart - Google Patents

Description

  The present invention relates to a load carrying carriage that includes a panel that rises from three sides of a load support base and can be folded into an L shape in plan view that can be nested in a horizontal direction when not in use.

As shown in FIG. 1A, this type of foldable load carrier cart includes a load support stand 1, a back panel 2 that rises from the rear side of the load support stand 1, and a side panel that rises from the left and right sides of the load support stand 1. 3 and 4 and wheels 5a to 5d disposed on the lower sides of the left and right ends of the back panel 2 and the lower sides of the front ends of the left and right panels, and the load support base 1 is folded in an upright posture along the inner side of the back panel 2. The side panel 4 on one side is supported so that it can be folded inward so that the folded load support 1 is sandwiched between it and the back panel 2. Thus, in use, the left and right sides of the load support base 1 are supported by the lower side members 6 of the left and right side panels 3 and 4 in a parallel posture. When the load carrier truck is lifted and moved by a forklift, It is necessary to prevent the left and right side panels 3 and 4 from swinging downward integrally with the back panel 2 with respect to the load support base 1 supported by the forklift. For this reason, in a state where the left and right side sides of the load support base 1 are supported by the lower side members 6 of the left and right side panels 3 and 4 in a parallel posture, the left and right side panels 3 and 4 and the load support base 1 are connected in the vertical direction. A coupling means for coupling is provided side by side. The coupling means between the left and right side panels 3 and 4 and the load support base 1 in this type of conventional cargo carrier cart is, for example, as described in Patent Document 1, A locking plate that protrudes upward from the inner side of the lower side member 6 of the side panels 3 and 4 is provided so as to be fitted horizontally on the left and right sides of the load support base 1 with respect to the locking holes of the locking plate. A detachable locking pin was provided.
JP 2000-71993 A

  In the conventional means for connecting the left and right side panels 3 and 4 and the load support base 1 as described above, when a plurality of load carrying carts folded in an L shape in plan view are nested in a horizontal direction, The locking plate that rises from the inner side of the lower side member 6 of the side panel 3 that is not folded is in sliding contact with the outer side surface of the lower side member 6 of the side panel 3 that is not folded of the load carrying cart nested inside the side panel. 3, the outer surface of the lower side member 6 may be damaged, or the locking plate itself may be deformed to support later use.

The object of the present invention is to provide a foldable load carrying cart that can solve the above-mentioned conventional problems, and the means thereof is shown with reference numerals of embodiments to be described later. In the invention described in claim 1, the load support base 1, the back panel 2 rising from the rear side of the load support base 1, the side panels 3 and 4 rising from the left and right sides of the load support base 1, and the back panel 2 Wheel 5a to 5d disposed on the lower side of the left and right ends and the lower side of the left and right side panels 3 and 4, and the load support 1 is foldably supported in a standing posture along the inner side of the back panel 2, The side panel 4 on one side is a load carrying carriage supported so as to be folded inward so that the folded load support base 1 is sandwiched between the back panel 2 and is erected at the front ends of the left and right side panels 3, 4. Open horizontally inward at the lower end of the vertical strut 7a Engagement recesses 36 are provided, and the left and right sides of the load support base 1 are provided on the left and right sides of the load support base 1 in the state where the left and right side panels are supported by the lower side members 6. On the other hand, there is provided a latching tool 29 that can be fitted / removed in the left / right lateral direction, and when the latching tool 29 is fitted in the engaged recess 36, the upward movement of the load support base 1 is applied to the left / right side panels 3, 4 It is configured to be blocked by the vertical column 7a .

  In this type of foldable cart, the left and right side panels 3, 4, the side panel 3 that is not folded, is fixed at a substantially right angle with respect to the back panel 2 and can be folded. The side panel 4 is supported so as to be swingable only between a posture substantially perpendicular to the back panel 2 and a posture folded inside the back panel 2, so that the left and right side panels 3, 4 are in a parallel posture. It can be configured not to swing outward, and the load support base 1 can prevent the side panel 4 on the folding side supporting the load support base 1 from swinging inward (folding direction).

  Therefore, in the state of use in which the lower side members 6 of the left and right side panels 3 and 4 support the load support 1, there is basically no need to restrict the horizontal swing of the left and right side panels 3 and 4. It is very difficult in terms of strength to construct the left and right side panels 3, 4, especially the side panel 4 on the side to be folded, so that it can only swing inward from a substantially right angle to the back panel 2. In practice, it is necessary to separately add a means for restricting horizontal swing of the left and right side panels 3 and 4 in use. In such a case, as described in claim 3, the side panel 4 including at least the wheel 5d to be folded is provided with a recessed portion (opening 14 or through hole 37) in the vertical direction, On the side of the support base 1, when the left and right sides of the load support base 1 are supported by the lower side members 6 of the left and right side panels 3, 4, the vertically engaged recesses (opening 14 or through-holes) are provided. 37) can be provided so as to project downward.

  Specifically, as described in claim 4, as the engaged recess in the vertical direction, the wheel 5d (or 5c, 5d) below the front end of the side panel 4 (or the left and right side panels 3, 4) is used. The vertical opening 14 provided in the mounting seat 10d (or 10c, 10d) can be used. As described in claim 5, the side panel 4 ( Or the through-hole 37 of an up-down direction can be provided in the lower-side member 6 of right-and-left both-side panel 3, 4).

  Moreover, in this kind of foldable load carrier cart, between the seats 10a to 10d for attachment of the wheels 5a to 5d and the lower side members 6 of the panels 2 to 4 so that nesting can be performed easily and smoothly. A shim plate is interposed, but as described in claim 6, seats 10a and 10b for mounting the wheels 5a and 5b on the lower sides of the left and right ends of the back panel 2 and a lower side member of the back panel 2 6, shim plates 15 and 16 are interposed, and mounting seats 10c and 10d of the wheels 5c and 5d below the front ends of the left and right side panels 3 and 4 are connected to the left and right side panels 3 and 4, respectively. In a portion overlapping the lower side member 6, an upper mounting surface 11 that is one step higher by the thickness of the shim plates 15, 16 is formed, and wheel mounting seats 10 c, 10 d below the front ends of the left and right side panels 3, 4 are Mounting the upper stage without a shim plate It can be attached to the lower side member 6 of the left and right sides panels 3 at 11.

According to the foldable load carrying cart according to the present invention as set forth in claim 1, when the load support base is lifted by a forklift in a use state in which the left and right sides of the load support base are supported by the lower side members of the left and right side panels. The left and right side panels are connected to the bottom members of the left and right side panels and the left and right side parts of the load support base. It is composed of a locking tool that can be withdrawn and retracted in the lateral direction, and protrudes into the corner of the load carrying cart folded into an L shape in plan view, that is, the side that receives another folded load carrying cart during nesting. Such a member is not required, and the locking device is provided with a load supporting base sandwiched between the back panel and the folded one side panel. How to carry a truck When the nesting is horizontally nested, the outer side surface of the other cargo carrier cart may be damaged by the structural member of the coupling means that couples the left and right side panels and the load support base in the vertical direction. There fear is not causing such a situation that hinder the use of later deformation.

Further, according to the present invention, the necessary locking tool on the load support base side can be disposed within the thickness region of the load support base, and is disposed so as to protrude below the load support base. Compared with the case where it is necessary, the risk that the locking tool is deformed or damaged due to contact with other objects is reduced.

When carrying out the present invention described in claim 1, according to the configuration described in claim 3, the horizontal swing of the side panel in the usage state is fitted to the engaged recess in the vertical direction on the side panel side and this. It can be regulated by the downward locking protrusion on the side of the load support base to be combined, and sufficient proof strength can be easily obtained against the outward external force acting on the side panel in the use state. In this case, according to the configuration of the fourth aspect, since the vertical opening provided in the wheel mounting seat plate is used as the engaged recess on the side panel side, the engaged recess is used as the side panel. Since no special member or processing is required for the construction on the side, the structure is extremely simple and can be implemented at a very low cost. Also, in the configuration according to the fifth aspect, the engaged recess can be configured only by providing a through-hole in the vertical direction in the lower side member of the side panel, which can also be implemented at low cost.

Further, according to the present invention described in claim 1, as described above, the locking plate standing from the inner side of the lower side member of the left and right side panels becomes unnecessary. Since the shim plate that was interposed when the wheel mounting seat plate was attached to the lower side of the front end of the both side panels, when the present invention was applied to this conventional configuration, the locking plate was provided continuously. In this case, if the structure according to claim 6 is adopted, a wheel mounting seat plate is not provided under the front end of the left and right side panels without using a shim plate. Can be attached, and the number of parts and assembly man-hours can be reduced to reduce costs. In addition, nesting can be performed smoothly and smoothly as in the case of attachment through a shim plate.

  The overall structure of the load carrying carriage is basically the same as that of the conventional one shown in FIG. 1A, and includes a load support base 1, a back panel 2, left and right side panels 3, 4 and wheels 5a to 5d. The panels 2 to 4 are composed of a gate-shaped peripheral frame member 7, a lower side member 6 connecting the lower ends of the vertical pillars before and after the portal-shaped peripheral frame member 7, and an upper horizontal member and a lower side member 6 of the portal-shaped peripheral frame member 7. It is composed of a vertical beam member 8 installed at an appropriate interval in between, and a horizontal beam member 9 installed in a plurality of vertical stages between vertical struts before and after the portal frame member 7.

  Hereinafter, specific examples of the present invention will be described with reference to FIGS. 1B to 7. The lower side members 6 of the panels 2 to 4 stand along the outside of the gate-shaped peripheral frame member 7 and the vertical beam member 8. It is composed of an angle member having a vertical plate portion and a horizontal plate portion extending to the inside of each of the panels 2 to 4 (the side on which the load support base 1 is located), and wheels are provided below both ends of the lower side member 6 of the back panel 2. Mounting seats 10a and 10b of 5a and 5b are attached, and mounting seats 10c and 10d of wheels 5c and 5d are attached to the lower side near the front end of the lower side member 6 of the left and right side panels 3 and 4.

  Each wheel mounting seat plate 10a to 10d has the same structure of a square, and as shown in FIG. 4, only the width of the lower side member 6 of each panel 2 to 4 (the width of the horizontal plate portion) is from one side. The upper mounting surface 11 and the lower mounting surface 12 are separated from each other. At the center of each wheel mounting seat plate 10a to 10d, there is an upper end of the cylinder shaft 13 that serves as a rotation vertical axis of the wheels (universal wheels) 5a to 5d mounted below the wheel mounting seat plates 10a to 10d. The cylindrical shaft 13 is fixed by caulking and an opening 14 in the vertical direction is formed. Thus, as shown in FIGS. 2 and 3, the mounting seats 10a and 10b of the wheels 5a and 5b disposed below the both ends of the back panel 2 are in a state in which the upper mounting surfaces 11 are parallel to each other on the inner side. The shim plates 15, 16 having a thickness that just fills the step between the upper mounting surface 11 and the lower mounting surface 12 are superimposed on the lower mounting surface 12. In a state where both ends of the lower side member 6 of the back panel 2 overlap the end portion and the rear end portion of the upper mounting surface 11, the wheel mounting seats 10 a and 10 b are bolt nuts 17 on the lower side member 6 of the back panel 2. 18 is attached.

  On the shim plates 15 and 16, vertical pins 19 and 20 are projected from a portion protruding forward from the lower side member 6 of the back panel 2. The vertical pins 19 and 20 also serve as stoppers for the shim plates 15 and 16 by having their lower ends fitted into holes that are also received by the wheel mounting seats 10a and 10b. Further, the shim plate 15 on the side panel 3 side includes an extension portion 15a that extends further forward from the lower wheel mounting seat plate 10a by a required length.

  The mounting seats 10c and 10d of the wheels 5c and 5d disposed on the lower side in the vicinity of the front ends of the left and right side panels 3 and 4 are disposed symmetrically so that the upper mounting surfaces 11 are parallel to each other on the outside. Wheel mounting seats 10c and 10d are attached to the lower side members 6 of the left and right side panels 3 and 4 by bolt nuts 21 and 22 in a state where the lower side members 6 of the left and right side panels 3 and 4 overlap the surface 11. . The mounting positions of the wheel mounting seats 10c and 10d with respect to the lower side members 6 of the left and right side panels 3 and 4 are such that the lower side members 6 of the left and right side panels 3 and 4 have a required distance ahead of these wheel mounting seats 10c and 10d. It is a position that only protrudes.

  The rear ends of the lower side members 6 of the left and right side panels 3 and 4 are vertical pins 19 projecting from shim plates 15 and 16 on the wheel mounting seats 10a and 10b below the left and right ends of the back panel 2. 20 is slidably fitted to the left and right. The fitting positions of the vertical pins 19 and 20 are concentric with the round pipe member constituting the vertical column 7b on the rear end side of the portal frame member 7 of the left and right side panels 3 and 4, and the vertical pins 19 and 20 20 is fitted in the center position of the lower end of the vertical column 7b. The side panel 3 on the unfolded side is joined at two points of the vertical pin 19 and the bolt nut 23 by connecting the lower side member 6 with the tip of the extending portion 15a of the shim plate 15 and the bolt nut 23. The back panel 2 is fixed at a substantially right angle.

  As shown in FIG. 1, the vertical column 7b on the rear end side of the portal frame member 7 of the left and right side panels 3 and 4, and the portal frame 7 of the back panel 2 positioned immediately behind the vertical column 7b. As shown in the related art, the vertical support columns 7a and 7b at the left and right ends of the are connected by connecting members 24 and 25, respectively. These connecting members 24 and 25 are fixed to the vertical pillars 7a and 7b at the left and right ends of the portal frame member 7 of the back panel 2 in a right-angled front direction, but the side panel 4 on the side to be folded is It does not hinder the left and right swinging around the vertical column 7b (vertical pin 20) on the rear end side of the gate-shaped peripheral frame member 7 as an axis. The vertical struts 7b on the rear end side of the gate-shaped peripheral frame member 7 of the side panel 3 on the unfolded side panel 3 may be fixed to the connecting member 24.

  As shown in FIG. 3, two horizontal support shafts 26 are attached to the lower side member 6 of the back panel 2 at an appropriate interval in a cantilevered manner. As shown in FIG. 2, two cylindrical shafts 27 are attached to the two horizontal support shafts 26 so that they can be fitted simultaneously. Thus, the load support base 1 is fitted around the horizontal support shaft 26 with respect to the lower side member 6 of the back panel 2 by fitting both the cylinder shafts 27 to the two horizontal support shafts 26 on the back panel 2 side. As shown in FIG. 1B, the left and right side panels 3 and 4 are placed in a parallel posture extending at a right angle forward with respect to the back panel 2 as shown in FIG. 1B. By being turned over, the left and right sides of the load support base 1 are configured to be supported by the horizontal plate portion of the lower side member 6 of the left and right side panels 3 and 4.

  As shown in FIGS. 1B, 6 and 7, when the left and right sides of the load support base 1 are supported on the left and right sides of the load support base 1 by the lower side members 6 of the left and right side panels 3 and 4 in a parallel posture. In addition, a pair of left and right locking projections 28 that fit into the vertical opening 14 at the center of the wheel mounting seats 10c and 10d attached to the lower side of the front ends of the left and right side panels 3 and 4 protrude downward from the bottom. As shown in FIGS. 1B and 5, the left and right side panels 3 and 4 projecting forward from the wheel mounting seats 10c and 10d are freely retractable from the lower space 6 of the lower side member 6. A pair of left and right locking tools 29 are provided at the bottom.

  As shown in FIG. 5, the locking tool 29 includes a shaft rod 31 that passes through the left and right vertical plate portions 30 a and 30 b of the groove member 30 attached to the bottom of the load support base 1 movably in the left and right directions. The operation lever portion 32 is configured and is bent at a right angle from the inner end of the shaft 31. Further, the shaft rod 31 is provided with an operation lever portion 32 and a pair of left and right projections 33a and 33b at substantially the same interval as the interval between the left and right vertical plate portions 30a and 30b of the groove member 30. The protrusion 33 b on the operation lever portion 32 side protrudes in the same direction as the operation lever portion 32, and the other protrusion 33 a protrudes in the opposite direction to the operation lever portion 32. Of the vertical plate portions 30a and 30b on both the left and right sides of the groove member 30, the projection 33b is vertically formed on the inner vertical plate portion 30b when the operation lever portion 32 is rotated approximately 90 degrees forward from the hanging posture. A notch recess 34 that can be pulled out from the plate portion 30b is provided.

  When the foldable load carrying cart having the above-described configuration is not in use, the load supporting table 1 is folded in a posture of standing along the inner side of the back panel 2 as shown in FIG. The side panel 4 on the foldable side can be swung horizontally by approximately 90 degrees so that 1 is sandwiched between the back panel 2 and the whole can be folded into an L shape in plan view. In this folded state, there is no member that protrudes inwardly from the lower side member 6 of the side panel 3 that is not folded, except for the wheel mounting seat plate 10c. The lower side surfaces of the lower side members 6 of the left and right side panels 3 and 4 are at the same level as the upper surfaces of the shim plates 15 and 16 at the same level as the upper surface of the upper mounting surface 11 of the wheel mounting seats 10a to 10d, Since the front wheel mounting seats 10c and 10d of the left and right side panels 3 and 4 are higher than the lower mounting surface 12 projecting inward from the lower side member 6 by the thickness of the shim plates 15 and 16, as described above. When the load carrier cart is folded, the portion (the portion of the lower mounting surface 12) that protrudes from the lower side member 6 of the front wheel mounting seat 10d of the side panel 4 to be folded is the lower side member 6 of the back panel 2. Enter the lower side without difficulty. Similarly, when another load carrier cart folded in the same manner is nested horizontally on the inner side (entrance corner side) of the L shape in plan view, the lower side member 6 of the side panel 3 of the inner load carrier cart that is not folded. Can be reasonably overlapped with a portion (a portion of the lower mounting surface 12) protruding from the lower side member 6 of the wheel mounting seat plate 10c on the front side of the unfolded side panel 3 of the outer cargo carrier cart.

  Note that the wheel mounting seats 10a to 10d are all square and have the same structure and the same size in plan view, and when the side panel 4 is folded parallel to the back panel 2 as is apparent from FIG. The wheel mounting seat 10d on the front side of the side panel 4 enters the lower side of the lower side member 6 of the back panel 2 but does not protrude outside the back panel 2 (in other words, each wheel). The width (depth) of the mounting seats 10a to 10d is substantially the same as the distance between the outer surfaces of the lower side members 6 of the panels 2, 4 when the side panel 4 is folded in parallel with the back panel 2. It is configured. In addition, a configuration in which no shim plate is required between the lower side member 6 of the side panels 3 and 4 and the wheel mounting seat plates 10c and 10d while configuring all the wheel mounting seat plates 10a to 10d in the same structure. It has become.

  When the load support base 1 is rotated upward to the upright position for folding the load carrying carriage, the pair of left and right locking tools 29 located on the left and right sides of the front end portion of the load support base 1 have their operation lever portions. As shown in FIG. 2, the shaft lever 31 rotates around the shaft center of the shaft rod 31 together with the operation lever portion 32 due to the gravity acting on the shaft rod 32, and the operation lever portion 32 hangs down from the shaft rod 31. In addition, the side panel 4 is not disturbed by folding or nesting. When unfolding and using the load carrying carriage, first, the folded side panel 4 is moved forward substantially perpendicular to the back panel 2. The central axis of rotation of the side panel 4 at this time is a vertical column 7b on the back panel 2 side of the portal peripheral frame member 7 of the side panel 4, and a shim plate is mounted on the wheel mounting seat 10b on the back panel 2 side. It is clear that the vertical pin 20 is fixed via 19.

  Next, the load support base 1 is rotated forward and downward around the horizontal support shaft 30 on the back panel 2 side. At this time, the pair of left and right locking tools 29 are as shown in FIGS. 2 and 5B. The protrusion 33a on the distal end side of the locking tool abuts on the vertical plate portion 30b on the inner side of the groove member 30 and the protrusion 33b on the operation lever portion 32 side has come out of the groove member 30, that is, the retreat limit position. By retracting the load support base 1 without causing interference between the locking member 29 and the lower side members 6 of the left and right side panels 3 and 4, the left and right side sides of the load supporting base 1 are the lower side members of the left and right side panels 3 and 4, respectively. 6 can be turned down to a horizontal posture supported by the robot.

  When the load support base 1 is unfolded and its left and right sides are supported by the lower side members 6 of the left and right side panels 3, 4, as shown in FIG. 6 and FIG. A pair of left and right locking projections 28 projecting on both sides automatically fits into the openings 14 in the wheel mounting seats 10c and 10d below the front end portions of the left and right side panels 3 and 4, that is, this implementation. In the embodiment, the vertical opening 14 provided in the center of the wheel mounting seats 10c and 10d is used as a vertically engaged recess into which the locking projection 28 is fitted. The left and right sides of the load support base 1 are supported by engaging the locking projections 28 on the load support base 1 side with the openings (engaged recesses) 14 on the left and right side panels 3 and 4 side. The side panels 3 and 4 and the load support base 1 are connected to each other in the horizontal direction on the front end side, and the unfolded side panel 3 is more firmly held in a right-angle posture (parallel posture) with respect to the back panel 2. Then, the side panel 4 on the side to be folded is prevented from swinging left and right around the vertical pin 20 and is securely held in a right angle posture (parallel posture) with respect to the back panel 2.

  If the left and right sides of the load support base 1 are supported by the lower side members 6 of the left and right side panels 3 and 4 as described above, as shown in FIGS. Switch from position to advance position. That is, the operation lever portion 32 of the latching tool 29 in a posture that rotates due to gravity and hangs down from the load support table 1 due to the load support table 1 being in a horizontal position is shown by a virtual line in FIG. 5C. Rotate approximately 90 degrees forward and forward. As a result, the direction of the protrusion 33b protruding outward from the groove member 30 and the notch recess 34 on the groove member 30 side coincide with each other, so that the locking tool 29 (shaft 31) is moved outward by the operation lever portion 32. Slide to the left and right side panels 3 and 4 side to allow the projection 33b to enter the groove member 30 from the notch 34 and simultaneously bring the other protrusion 33a into contact with the vertical plate 30a of the groove member 30. Then, the locking tool 29 is switched to the advance limit position. Thus, as shown in FIG. 5A, the locking tool 29 switched to the advance limit position enters the lower side member 6 of the left and right side panels 3, 4 and is adjacent to the lower side surface of the lower side member 6. Thus, the load support base 1 supported by the lower side members 6 of the left and right side panels 3 and 4 cannot be rotated upward. In other words, when the load support base 1 is lifted with a forklift, the left and right side panels 3 and 4 together with the back panel 2 do not fall forward and downward with respect to the load support base 1 due to gravity.

  As described above, the load carrier can be used as a load carrier by unfolding and assembling. However, when this load carrier is folded into an L shape in plan view shown in FIG. The pair of left and right locking tools 29 at the advanced limit position shown in 5A are switched to the backward limit position shown in FIG. 5B. That is, as indicated by a phantom line in FIG. 5C, the operation lever portion 32 of the locking tool 29 hanging down from the bottom of the load support base 1 is rotated approximately 90 degrees forward and forward. At this time, it is desirable to provide a stopper 35 on the load support base 1 side that contacts the operation lever portion 32 and prevents further upward rotation. By this operation, the direction of the protrusion 33b adjacent to the inside of the vertical plate portion 33b of the channel member 30 and the cutout recess 34 of the vertical plate portion 33b coincide with each other. (Shaft 31) is slid inwardly, and the projection 33b is cut out from the recess 34 to the outside of the groove member 30, and the other protrusion 33a is brought into contact with the vertical plate portion 30b of the groove member 30. Then, the locking tool 29 is switched to the retreat limit position. As a result, the overlap in the vertical direction between the locking member 29 and the lower side members 6 of the left and right side panels 3 and 4 is eliminated, and the load support base 1 can be rotated upward.

  If the load support base 1 is turned upward by approximately 90 degrees and folded in a posture that stands up along the inside of the back panel 2, the side panel 4 is swung horizontally by approximately 90 degrees in the upright posture. By sandwiching the load support base 1 between the back panel 2 and the folded side panel 4, the entire load carrying carriage can be folded into an L shape in plan view as shown in FIG. The pair of left and right engaging projections 28 at the bottom of the load support base 1 are turned by the wheel mounting seats 10c and 10d below the front end portions of the left and right side panels 3 and 4 by the upward rotation of the load support base 1. It is automatically extracted from the provided opening (locked recess) 14.

  In addition, although embodiment which engages the latching tool 29 with the lower side member 6 of the right-and-left both side panels 3 and 4 was demonstrated, as shown in FIG.8 and FIG.9, as shown in FIG. 4 is provided at the lower end portion of the vertical column 7a on the front end side of the portal peripheral frame member 7 with an engaged recess 36 that opens horizontally inward toward the load supporting base 1 and faces the engaged recess 36. In this manner, the locking tool 29 can be disposed on the load support base 1. In this case, the locking tool 29 is built in the internal space (in the thickness region) of the load support base 1, and at least the internal space of the load support base 1 in the region where the operation lever portion 32 moves by operation is located on the lower side. The operation lever portion 32 is opened and protrudes downward from the internal space of the load support base 1. Further, the locking tool 29 protrudes outward from the openings provided in the left and right side walls 1 a of the load support base 1, but the left and right side walls 1 a of the load support base 1 are formed on the groove member 30. It can also be used as the outer vertical plate portion 30a.

  The engaged recessed portion 36 provided at the lower end portion of the vertical column 7a is formed so that the peripheral wall of the lower end portion of the vertical column 7a faces the locking tool 29 when the vertical column 7a is formed of a round pipe material. Although an inverted U-shaped notch can be formed from the hole or the lower end, as shown in FIG. 8 and FIG. 9, it is almost opposite to the locking member 29 on the peripheral wall of the lower end portion of the vertical column 7a. It is desirable to form the engaged recess 36 by recessing the half region inward and making the cross-sectional shape of the lower end of the vertical column 7a C-shaped.

  Further, wheel mounting seats 10c, 10d attached to the lower sides of the front end sides of the left and right side panels 3, 4 are provided as engaged recesses into which the locking projections 28 on the load support base 1 are fitted in the vertical direction. Although the embodiment using the opening 14 in the vertical direction has been described, as shown in FIG. 10, the through-holes 37 in the vertical direction are provided in the lower side members 6 of the left and right side panels 3 and 4 so An engaging recess is provided, and the locking projection 28 is located at a position where the load support base 1 can be fitted into the through hole 37 when the load support base 1 is supported by the lower side members 6 of the left and right side panels 3, 4, for example, It can be provided in a state of being attached to both side surfaces.

  Of the left and right side panels 3, 4, the side panel 3 that is not folded is basically fixed at a substantially right angle forward with respect to the back panel 2. The engaging protrusions (opening 14 and through-hole 37) in the vertical direction on the stop projection 28 and the side panel can be provided only on the side panel 4 side to be folded.

Fig. A is a perspective view for explaining the basic configuration of a foldable load carrying cart, and Fig. B is a cross-sectional plan view of the load carrying cart according to an embodiment of the present invention in a folded state. Hereinafter, it is a figure showing a load carrier trolley concerning an embodiment of the present invention, and this figure is a transverse plane view showing a folded state of a load carrier trolley. It is a cross-sectional top view in the state which removed the load support stand. Fig. A is a plan view showing a wheel mounting seat plate, Fig. B is a front view of a wheel provided with a wheel mounting seat plate, and Fig. C is a side view thereof. FIG. A is a longitudinal front view of the main part showing a state where the locking tool and the lower side member of the side panel are engaged, and FIG. B is a vertical section of the main part showing a state where the locking tool and the lower side member of the side panel are separated. A front view and C figure are longitudinal side views which show the detail of the support structure of a locking tool. It is a partial longitudinal cross-sectional front view of the principal part in the state in which the load support stand was supported by the lower side member of the side panel. It is a side view of the principal part in the state in which the load support stand was supported by the lower side member of the side panel. It is a partial cross-sectional top view which shows the principal part of another embodiment. It is a vertical front view of the principal part. It is a partially longitudinal front view of the principal part in another embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Load support stand 2 Back panel 3, 4 Side panel 5a-5d Wheel 6 Lower side member 7a of each panel Vertical support | pillar 10a-10d of the front end side of a side panel Wheel mounting seat board 11 Upper stage mounting surface 12 of wheel mounting seat board Wheel mounting Lower mounting surface 14 of seat plate Opening in the vertical direction (engaged recess in the vertical direction)
15, 16 Shim plates 17, 18, 21 to 23 Bolt nuts 19 and 20 Vertical pin 28 A pair of left and right locking projections 29 A pair of left and right locking tools 32 An operation lever portion 36 of the locking tool Horizontally inwardly engaged recess 37 Up-down through-hole (up-down engaged recess)

Claims (6)

The load support base, the back panel rising from the rear side of the load support base, the side panel rising from the left and right sides of the load support base, and the lower left and right ends of the back panel and the lower front end of the left and right panels The load support base is foldably supported in an upright position along the inside of the back panel, and one side panel can be folded inward so that the folded load support base is sandwiched between it and the back panel. It is a supported load carrying carriage, and an engaged recess that opens horizontally inward is provided at the lower end of the vertical column that is erected at the front ends of the left and right side panels. In the state where the left and right side sides of the load support base are supported by the lower side members of the left and right side panels, a locking tool that is detachable in the horizontal direction with respect to the recessed portion to be engaged is provided. load support in the state fitted to the engaged recess Upward movement is adapted to be blocked by the vertical column of the left and right sides panels, collapsible luggage transport truck. The engaged recessed portion has a substantially half region facing the locking tool inside the peripheral wall of the lower end portion of the vertical column, and the cross-sectional shape of the lower end portion of the vertical column is C-shaped. The foldable load carrier cart according to claim 1, which is configured by   The side panel including at least the wheel on the side to be folded is provided with an engaged recess in the vertical direction, and the left and right sides of the load support base are the lower side members of the left and right side panels on the left and right sides of the load support base. The foldable load carrying cart according to claim 1 or 2, wherein a downward locking projection that fits into the engaged recess in the up-down direction when projecting is supported.   The foldable load carrier cart according to claim 3, wherein an opening in a vertical direction provided on a wheel mounting seat on the lower side of the front end of the side panel is used as the engaged recess in the vertical direction.   The foldable cargo carrier cart according to claim 3, wherein a vertical through hole is provided in a lower side member of the side panel as the vertically engaged recess. A shim plate is interposed between the wheel mounting seat plate on the lower side of the left and right ends of the back panel and the lower side member of the back panel, and the wheel mounting seat plate on the lower side of the front end of the left and right side panels is An upper mounting surface that is one step higher by the thickness of the shim plate is formed in the portion that overlaps the lower side member of the left and right side panels, and the wheel mounting seat plate on the lower front end of the left and right side panels does not go through the shim plate. wherein the upper mounting surface is attached to the lower member of the left and right sides panels, collapsible luggage transport trolley according to any one of claims 1 to 5.