JP4407821B2 - 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. 1, this type of foldable load carrying 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 below the left and right ends of the back panel 2 and below the front ends of the left and right panels, and the load support base 1 is folded in an upright position along the inside 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 the back panel 2 and the side panel 4 is well known in the prior art. is there. Thus, in the foldable load carrying cart having such a configuration, the lower side members of the panels are arranged so that the folding and the horizontal nesting of the folded load carrying carts can be performed smoothly and smoothly. It is necessary to make a step between the bottom surface and the top surface of the wheel mounting seat that protrudes laterally from the lower side member. For this purpose, the lower side member of the back panel and the wheel mounting seat plate that is attached to the lower side of both ends, The shim plate is interposed and fixed between. Also, in order to make the support structure of the left and right side panels to both ends of the back panel basically the same, the vertical pins protrude upward from the wheel mounting seats that protrude from the lower side of the back panel to the left and right side panels. Further, the rear ends of the left and right panels are fitted to and supported by these vertical pins, and the side panel to be folded is configured to be able to swing left and right around the vertical pin, and the side that is not folded. The panel was additionally provided with means for restricting the swing about the vertical pin.
JP 2000-71993 A

  Thus, in the conventional foldable load carrying cart described in Patent Document 1, as a means for restricting the unfolded side panel from swinging around the vertical pin, the lower side of both ends of the back panel is used. Of the shim plate, the forward extension portion of the shim plate located on the rear side of the non-foldable side panel and the lower side member of the non-foldable side panel are fastened with bolt nuts in the vertical direction Since the configuration to be used was adopted, the number of parts and assembly man-hours were large, and the cost was high.

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. , Load support base 1, back panel 2 rising from the rear side of load support base 1, side panels 3 and 4 rising from the left and right sides of load support base 1, and both lower and left and right side panels of back panel 2 3 and 4 are provided with wheels 5a to 5d disposed below the front end, the load support base 1 is foldably supported in an upright position along the inner side of the back panel 2, and the one side panel 4 is folded. The load support base 1 is supported so as to be folded inward so as to be sandwiched between the back panel 2 and the side panel 4 on one side is folded inward so as to sandwich the folded load support base 1 between the back panel 2. The left and right sides of the lower side member 6 of the back panel 2 are supported. Shim plates 18 and 19 are interposed and fixed between the upper part and the wheel mounting seats 10a and 10b arranged on the lower side thereof, and the rear ends of the lower side members 6 of the left and right side panels 3 and 4 are connected to the back panel. A load carrying carriage fitted and supported by vertical pins 20 and 21 disposed on the wheel mounting seats 10a and 10b protruding forward from the lower left and right ends of the lower side member 6 of the lower side member 2; Of the left and right shim plates 18, 19, the shim plate 18 adjacent to the unfolded side panel 3 includes an extending portion 18a extending forward and an upward protruding piece at the tip of the extending portion 18a. 18b, on the rear end side of the lower side member 6 of the side panel 3 on the unfolded side panel 3 is provided with a rocking restricting locking hole 25 into which the projecting piece 18b is fitted upward . 4 on the front end side of the lower side member 6. In the load carrying trolley provided with the locking holes 24 and 25 for locking the load supporting base 1 supported by the material 6, the lower side members 6 of the left and right side panels 3 and 4 are attached to the left and right side panels 3 and 4, respectively. Used as the rocking restricting locking hole 25 provided on the rear end side of the lower side member 6 of the side panel 3 on the side panel 3 on the side panel 3 on the side panel 3 that is configured to be symmetric in the longitudinal direction so that it can be used in a different direction. The locking hole 25 is not used .

  In the foldable load carrying cart according to the present invention having the above-described configuration, the side panel on the side that is not folded is also provided with the vertical pin on the wheel mounting seat plate located on the rear side, similarly to the side panel that is folded. The swing control means for the unfolded side panel, which is necessary in this case, can be used to support the back panel side, and the load carrying cart can be folded and the folded load carrying cart can be nested. A shim plate provided for smooth operation, that is, a shim plate that is fixed between the right and left ends of the lower side member of the back panel and the lower wheel mounting seat plate, and is folded. For swing regulation, which is provided on the front extension of the shim plate adjacent to the non-side side panel and the protruding piece at the tip of the shim plate, and the lower side member of the non-folded side panel, and the protruding piece fits Person in charge Since it is configured with holes, compared to a configuration that requires a conventional bolt and nut can be reduced and the number of parts and assembly steps required, the cost can be reduced.

Further , according to the configuration of the present invention , the lower side members of the left and right side panels can be used in common to facilitate inventory management and to reduce the cost, and at the same time, because of the swing regulation means of the side panel that is not folded. In addition, it is not necessary to process a dedicated locking hole in the lower side member of the side panel on the unfolded side panel, and the cost can be reduced also in this respect.

  The overall structure of the load carrying carriage is basically the same as that of the conventional one shown in FIG. 1, and is composed of 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, a specific embodiment of the present invention will be described with reference to FIGS. 2 to 7. The lower side member 6 of each panel 2 to 4 stands along the outside of the gate-shaped peripheral frame member 7 or the vertical beam member 8. It is composed of an angle member having a vertical plate portion 6a and a horizontal plate portion 6b extending to the inner side of each of the panels 2 to 4 (the side on which the load support base 1 is located), and is below the both ends of the lower side member 6 of the back panel 2 The mounting seats 10a and 10b of the wheels 5a and 5b are respectively attached by two bolts and nuts 11, and the mounting seats 10c of the wheels 5c and 5d are located below the front ends of the lower side members 6 of the left and right side panels 3 and 4. 10 d is attached with two bolts and nuts 12.

  Each of the wheel mounting seats 10a to 10d has the same structure of a square, and as shown in FIGS. 8 and 9, upper mounting surfaces 13a and 13b formed one step higher at two adjacent corners, and the other two A lower mounting surface 14 formed so as to connect two corners, and a recessed step 15 formed between the two upper mounting surfaces 13a and 13b at the same height as the lower mounting surface 14 are provided. In addition, mounting bolt holes 16a to 16d are provided on the upper surfaces of the respective corners of the wheel mounting seats 10a to 10d, and the wheel mounting seats 10a to 10d are provided at the center of the wheel mounting seats 10a to 10d. The upper end of the cylindrical shaft 17 which is the rotational vertical axis of the wheels (universal wheels) 5a to 5d attached to the lower side is fixed by caulking. Thus, as shown in FIGS. 5 and 6, the mounting seats 10 a and 10 b of the wheels 5 a and 5 b arranged below the both ends of the back panel 2 have their upper mounting surfaces 13 a and 13 b located inside. The shim plates 18, 19 having a thickness that just fills the steps between the upper mounting surfaces 13 a, 13 b are superimposed on the respective lower mounting surfaces 14. In the state where both ends of the lower side member 6 of the back panel 2 overlap on 19 and the lower side member 6 of the back panel 2 overlaps one upper mounting surface 13a or 13b inside thereof, the lower side member 6 of the back panel 2 Wheel mounting seats 10a and 10b are attached to the horizontal plate 6b by two mounting bolt holes 16b and 16c or 16a and 16d (see FIG. 8) and two bolt nuts 11, respectively.

  The shim plates 18, 19 are provided with vertical pins 20, 21 projecting forward from the lower side member 6 of the back panel 2. The vertical pins 20 and 21 have their lower ends fitted into the mounting bolt holes 16d or 16c (see FIG. 8) of the wheel mounting seats 10a and 10b, so that they also stop the shim plates 18 and 19 from rotating. ing. Further, the shim plate 18 on the side panel 3 side is provided with an extending portion 18a that extends further forward from the lower wheel mounting seat plate 10a by a required length, and the upper end of the extending portion 18a faces upward. A protruding piece 18b protruding in a bent manner is formed.

  The mounting seats 10c and 10d of the wheels 5c and 5d disposed on the lower side near the front ends of the left and right side panels 3 and 4 are disposed symmetrically with the upper mounting surfaces 13a and 13b positioned on the outer side. In a state where the horizontal plate portion 6b of the lower side member 6 of the left and right side panels 3 and 4 overlaps the mounting surfaces 13a and 13b, the wheel mounting seat 10c is placed on the horizontal plate portion 6b of the lower side member 6 of the left and right side panels 3 and 4. , 10d are mounted by two mounting bolt holes 16a, 16b (see FIG. 8) and two bolt nuts 12, respectively. 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 front end vertical column 7a of the portal frame 7 of the left and right side panels 3 and 4 is the wheel mounting seat plate 10c. , 10d is a position that protrudes forward by a required distance.

  The lower side members 6 of the left and right side panels 3 and 4 are of the same structure and are used in different directions so as to be symmetrical. In other words, the left and right side panels 3 and 4 have the same overall structure including the lower side member 6 and are arranged in different directions so that the vertical plate portion 6a of the lower side member 6 is located outside. Accordingly, in the horizontal plate portion 6b of the lower side member 6 of the left and right side panels 3 and 4, two bolt holes 22 and 23 for attaching the wheel mounting seat plates 10c and 10d as described above are provided at positions near both ends, respectively. At the same time, locking holes 24 and 25 are provided at intermediate positions of the two bolt holes 22 and 23, respectively. These locking holes 24 and 25 are long in the length direction of the lower side member 6 and have a wide trapezoidal shape on the inner side 6c side of the horizontal plate portion 6b. The locking holes 24 and 25 and the horizontal plate portion The locking plate portions 24a, 25a are formed by pressing so that the portion between the inner side 6c of 6b is raised one step higher. Further, the lower side members 6 of the left and right side panels 3 and 4 are overlapped with the wheel mounting seats 10a and 10b so as to be concentric with both ends vertical columns 7a and 7b of the portal frame 7 of the left and right side panels 3 and 4. Pin holes 26 and 27 into which the vertical pins 20 and 21 protruding from the shim plates 18 and 19 are just inserted are provided.

  Therefore, the wheel mounting seat plate 10c is attached to the lower side member 6 of the side panel 3 on the unfolded side using the two bolt holes 22 located on the front side, and the intermediate position between the two bolt holes 22 is related. The stop hole 24 overlaps the upper side of the wheel mounting seat plate 10c as a lock hole for locking the load support base, which will be described later, and two bolt holes 23 located on the back panel 2 side and a lock hole 25 at an intermediate position thereof. The locking hole 25 located on the side of the back panel 2 that is not used as the locking hole for locking the load support base is used as the locking hole 25 for swing restriction of the side panel 3. Further, a wheel mounting seat plate 10 d is attached to the lower side member 6 of the side panel 4 on the side to be folded using the two bolt holes 23 located on the front side, and the intermediate position between the two bolt holes 23 is locked. A hole 25 overlaps the upper side of the wheel mounting seat plate 10d as a locking hole for locking the load support base, which will be described later, and two bolt holes 22 positioned on the back panel 2 side and a locking hole 24 at an intermediate position play. It will be. At this time, the locking holes 24 and 25 for locking the load support base that overlap the wheel mounting seats 10c and 10d are located between the upper mounting surfaces 13a and 13b (recessed step portions) of the wheel mounting seats 10c and 10d. 15) and between the locking plate portions 24a, 25a adjacent to the inside of the locking holes 24, 25 and the wheel mounting seat plates 10c, 10d, the locking holes 24, A space that extends from 25 to L-shaped is formed.

  The left and right side panels 3, 4 having the above-described configuration have shim plates 18, 27 fixed to the wheel mounting seats 10 a, 10 b of the back panel 2 with pin holes 26, 27 located on the back panel 2 side of the lower side member 6. By being fitted to the vertical pins 20 and 21 protruding from 19, the vertical pillar 7b on the back panel 2 side of the portal peripheral frame member 7 is supported so as to be swingable left and right. At this time, the protruding piece 18b at the distal end of the extended portion of the shim plate 18 is fitted in the rocking restricting locking hole 25 located on the back panel 2 side of the lower side member 6 of the side panel 3 on the side that is not folded. The swing range of the side panel 3 is limited to a slight angle range of the difference between the width of the protruding piece 18b and the width of the locking hole 25.

  As shown in FIG. 1, the vertical column 7b on the back panel 2 side of the portal frame member 7 of the left and right side panels 3 and 4 and the portal frame frame material of the back panel 2 located immediately behind the vertical column 7b. The vertical struts 7a and 7b at the left and right ends in FIG. 7 are connected to the vertical struts 7b on the back panel 2 side of the portal frame 7 by the connecting members 28 and 29 as known in the art. The left and right side panels 3 and 4 are connected to each other in a state in which the left and right side panels 3 and 4 are not separated upward from the back panel 2 (a state in which the pin holes 26 and 27 and the vertical pins 20 and 21 are not separated vertically). ing.

  As shown in FIG. 4, two horizontal support shafts 30 are attached to the lower side member 6 of the back panel 2 in a cantilever manner on the horizontal plate portion 6 b at an appropriate interval. Two cylindrical shafts 31 are attached to the side edges so that they can be fitted to the two horizontal support shafts 30 at the same time. Thus, the load support base 1 is fitted around the horizontal support shaft 30 with respect to the lower side member 6 of the back panel 2 by fitting both tube shafts 31 to the two horizontal support shafts 30 on the back panel 2 side. The left and right side panels 3 and 4 are supported so as to be able to swing up and down, but as shown in FIG. As shown in FIG. 3, the left and right sides of the load support base 1 are supported by the horizontal plate portion 6 b of the lower side member 6 of the left and right side panels 3, 4 by being tilted. Further, at this time, substantially the entire locking holes 24 and 25 provided in the lower side member 6 of the left and right side panels 3 and 4 are configured to be exposed adjacent to the left and right side sides of the load support base 1. .

  As shown in FIGS. 3 and 4, the left and right side panels 3, 4 are supported at the front ends of the left and right sides of the load support base 1 when supported by the lower side members 6 of the left and right side panels 3, 4 in a parallel posture. A portion adjacent to the inside of the front vertical column 7a in the gate-shaped peripheral frame member 7 is cut into a square shape to form recessed side surfaces 1a and 1b. Therefore, when the left and right side panels 3 and 4 are swung inward from the parallel posture in a situation where the left and right side panels 3 and 4 are not restricted from swinging inward from the parallel posture, as shown in FIG. Further, the front vertical column 7a in the portal frame 7 of the left and right side panels 3 and 4 comes into contact with the recessed side surfaces 1a and 1b on the load support base 1 side, and further inward swinging is restricted. It becomes an inclined posture.

  Corresponding to the left and right sides of the load support base 1 are locking holes 24 and 25 for locking the load support base at positions overlapping the wheel mounting seats 10c and 10d of the lower side members 6 of the left and right side panels 3 and 4. Thus, a locking piece 32 is attached. When the left and right side panels 3 and 4 are in the inclined posture shown in FIG. 10, these locking pieces 32 correspond to the locking holes 24 and 25 for locking the load support base (the front end side of the side panels 3 and 4). When the left and right side panels 3 and 4 are in the parallel posture shown in FIG. 3, the locking holes 24 and 25 can be inserted from the locking holes 24 and 25 for locking the load support base. The tip is bent inward so as to enter the space between the locking plate portions 24a, 25a adjacent to the inside and the wheel mounting seat plates 10c, 10d.

  A lock means 33 is provided on the front side of the load support base 1. The locking means 33 includes a pair of left and right lifting lock members 34 disposed adjacent to the inside of the recessed side surfaces 1 a and 1 b of the load support base 1, and a horizontal shaft rod 35 that interlocks and connects the both lifting lock members 34. And an operation portion 36 provided on the horizontal shaft 35 at the center position of the both lift lock members 34. Specifically, both ends of one horizontal shaft rod 35 are bent downward at a right angle to form a pair of left and right lifting lock members 34, and the central portion of the horizontal shaft rod 35 is formed into a horizontally long U-shape downward at a right angle. The operation section 36 is formed by bending the operation section 36. Then, the horizontal shaft rod 35 is fitted into a pair of left and right lifting guide groove portions 37 a and 37 b formed along the front side of the load support base 1, and the lift lock members 34 at both ends are moved downward from the bottom surface of the load support base 1. While projecting, the intermediate operation unit 36 is configured to be pushed upward by a foot tip or the like inserted from the front side of the load support base 1. The top plate 1c constituting the load support surface of the load support base 1 is provided with a cover portion 1d that covers the upper portion of the operation portion 36 between the pair of left and right lifting guide groove portions 37a and 37b, and a horizontal shaft 35 is provided. It is configured not to leave upward. Reference numeral 1 e denotes a notch formed on the front side of the load support base 1 in order to allow the operation portion 36 to be operated from the front side of the load support base 1.

  A hemispherical locking member held at the protruding position shown in the figure by the urging force of a spring built in the load supporting table 1 is positioned immediately before the locking piece 32 on the left and right sides of the load supporting table 1. 38 is provided. The pair of left and right locking members 38 are arranged on the back panel 2 side of the portal frame member 7 of the left and right side panels 3, 4 when the load support base 1 is rotated to a standing posture along the inside of the back panel 2. When passing through the vertical column 7b to the rear side, the vertical column 7b is retracted against the biasing force, and when the vertical column 7b has been passed through the rear side, the vertical column 7b is returned to the illustrated protruding position by the biasing force. Thus, the standing load support base 1 is prevented from turning over to the original horizontal posture.

  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. At this time, as shown in FIGS. 2 and 7, the tip protruding piece 18 b of the shim plate 18 protruding forward in a state of being fixed to the back panel 2 side is located on the rear end side of the lower side member 6 of the side panel 3. Since the side panel 3 on the unfolded side is fitted in the rocking restricting locking hole 25, the side panel 3 on the non-foldable side is left and right only within a slight angle range of the difference between the width of the protruding piece 18b and the width of the locking hole 25. The back panel 2 is held at a substantially right angle with respect to the back panel 2.

  In the above folded state, there is no member protruding inward from the lower side member 6 of the side panel 3 on the side that is not folded. Further, the lower side surface of the horizontal plate portion 6b of the lower side member 6 of the left and right side panels 3, 4 is the upper surface of the shim plates 18, 19 at the same level as the upper surface of the upper mounting surfaces 13a, 13b of the wheel mounting seat plates 10a-10d. The shim plates 18, 19 are lower than the lower mounting surface 14 projecting inward from the horizontal plate portion 6b of the lower side member 6 at the front wheel mounting seat plates 10c, 10d of the left and right side panels 3, 4. Therefore, when the load carrying cart is folded as described above, the portion (the lower mounting surface 14 of the lower mounting surface 14) protrudes from the lower side member 6 at the front wheel mounting seat 10d of the side panel 4 to be folded. Part) enters the lower side member 6 of the back panel 2 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 on a portion (a portion of the lower mounting surface 14) 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 carriage.

  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 unfolding and using a load carrying cart from the above folded state, 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 21 is fixed via 19.

  Next, the load support base 1 is turned forward and downward around the horizontal support shaft 30 on the back panel 2 side. As shown in FIG. 11, the load support base 1 is turned to a position near horizontal. When the front vertical struts 7a in the portal frame member 7 of the left and right side panels 3, 4 are positioned outside the recessed side surfaces 1a, 1b at the front end portions of the left and right sides, FIG. 10 and FIG. 12, the left and right side panels 3, 4 are swung toward the load support base 1, and the left and right side panels 3, 4 are connected to the front vertical column 7 a in the gate-shaped peripheral frame member 7. The inclined posture is in contact with the recessed side surfaces 1a and 1b at the front ends of the left and right sides. At this time, the side panel 3 that swings around the vertical pin 20 fixed to the wheel mounting seat 10a on the back panel 2 side has the width of the protruding piece 18b of the shim plate 18 and the width of the locking hole 25. Is allowed to swing from a parallel posture to an inclined posture.

  When the left and right side panels 3 and 4 are in the inclined posture, as shown in FIGS. 11 and 12, the locking pieces 32 on the left and right sides of the load support base 1 are the front ends of the lower side members 6 of the left and right side panels 3 and 4. A pair of left and right lifting lock members 34 of the lock means 33 located at the lower position protruding directly from the load support base 1 while being positioned directly above the locking holes 24 and 25 on the side (load support base lock) Since it is located above the horizontal plate portion 6b of the lower side member 6 of the side panels 3 and 4, the left and right side panels of the left and right sides of the load support base 1 are tilted by turning the load support base 1 further downward. When placed on the horizontal plate portion 6b of the lower side member 6 of 3, 4, the pair of left and right engaging pieces 32 on the load support base 1 side are provided on the left and right side panels 3, 4 as shown in FIG. Fits into the locking holes 24 and 25 on the front end side (for locking the load support base) of the lower side member 6 In addition, a pair of left and right lifting lock members 34 on the load support base 1 side are pushed up by the horizontal plate portion 6b of the lower side member 6 of the left and right side panels 3 and 4, and against the gravity together with the horizontal shaft rod 35 and the operation portion 36. Ascend vertically. In this state, when the left and right side panels 3 and 4 are swung outward from the inclined posture to the original parallel posture, as shown in FIGS. 3 and 14 to 16, a pair of left and right locking pieces on the load support base 1 side. 32 enters the lower space of the locking plate portions 24a and 25a from the locking holes 24 and 25 on the front end side (for locking the load support base) of the lower side member 6 of the left and right side panels 3 and 4, and supports the load. The pair of right and left lifting lock members 34 on the side of the base 1 are inwardly disengaged from the lower side members 6 of the left and right side panels 3, 4, and descend by gravity together with the horizontal shaft rod 35 and the operation unit 36. Returns to the lower position adjacent to the inner side of

  As a result, the left and right side panels 3, 4 swinging outward beyond the parallel posture means that the left and right sides of the pair of left and right locking pieces 32 on the load support base 1 side and the left and right sides of the locking pieces 32 are covered. The left and right side panels 3 and 4 are swung from the parallel posture to the inclined posture again by the contact in the left and right direction with the side edges on the locking holes 24 and 25 side of the locking plates 24a and 25a on the panels 3 and 4 side. The movement in the left-right direction between the pair of left and right lifting lock members 34 at the lower position on the load support base 1 and the inner side of the lower side member 6 of the left and right side panels 3 and 4 (the inner side of the horizontal plate portion 6b). The fact that the load support table 1 is prevented by the contact and further pivots upward with respect to the side panels 3 and 4 covers the pair of left and right locking pieces 32 on the load support table 1 side and these locking pieces 32. Blocked by vertical contact with the left and right side panels 3, 4 and the locking plate portions 24a, 25a It is.

  As shown in FIG. 16, when the left and right sides of the load support base 1 are placed on the horizontal plate portion 6 b of the lower side member 6 of the left and right side panels 3, 4 in the inclined posture, or the horizontal plate portion 6 b of the lower side member 6. When the left and right side panels 3, 4 swing left and right between the inclined posture and the parallel posture, the protruding piece 18 b and the locking plate of the shim plate 18 protruding on the horizontal plate portion 6 b of the lower side member 6. In order to avoid the portions 24 a and 25 a from interfering with the left and right sides of the load support base 1, notches 39 and 40 are provided on the side plates constituting the left and right sides of the load support base 1. Although not shown, in the above situation, the horizontal position of the two bolt nuts 12 in which the wheel mounting seat plates 10c, 10d are mounted on the horizontal plate portion 6b of the lower side member 6 of the left and right side panels 3, 4 is shown. The bolt heads protruding from the plate portion 6b interfere with the left and right sides of the load support base 1, and the horizontal plate portion 6b of the lower side members 6 of the left and right side panels 3 and 4 in which the left and right sides of the load support stand 1 are inclined. When it cannot be placed on the upper side, the side plate constituting the left and right sides of the load support base 1 is provided with a notch or the bolt head is horizontal so that this interference can be avoided. What is necessary is just to make it the structure which does not protrude from the board part 6b.

  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. 3B, the operation unit 36 of the locking means 33 is pushed upward with the tip of a foot or the like, and a pair of left and right lifting lock members 34 are interposed via the horizontal shaft 35, and the lower ends thereof are the left and right side panels 3, 4 Is raised to an upper position slightly higher than the upper surface of the horizontal plate portion 6b of the lower side member 6. As a result, the left and right side panels 3 and 4 can be horizontally swung from a parallel posture to an inclined posture approaching each other. Switch to the tilt position shown. As a result, as shown in FIG. 13, the pair of left and right locking pieces 32 on the load support base 1 side is locked from the position immediately below the locking plate portions 24 a and 25 a in the lower side members 6 of the left and right side panels 3 and 4. , 25, the locking piece 32 can be detached upward from the locking holes 24, 25, and the load support 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 load support base fixing means for connecting the load support base 1 supported by the lower side members 6 of the left and right side panels 3 and 4 and the left and right side panels 3 and 4 is the locking holes 24 and 25 shown in the above embodiment. , The locking piece 32 and the locking means 33 are not limitative. For example, it may have a conventionally well-known configuration as described in Patent Document 1, and may have a configuration that does not require the engagement holes 24 and 25 in the lower side members 6 of the left and right side panels 3 and 4. . In this case, a swing restricting locking hole into which the protruding piece 18b at the front end of the extended portion of the shim plate 18 is fitted upward is separately provided on the rear end side of the lower side member 6 of the side panel 3 that is not folded. It ’s fine.

  Moreover, in the said embodiment, since the side panel 3 of the unfolded side employ | adopts the load support stand fixing means which must be in the state which can be rock | fluctuated between a parallel attitude | position and an inclination attitude | position, The side panel 3 is allowed to swing left and right within a certain angular range between the protruding piece 18b at the distal end of the extending portion and the swing regulating locking hole 25 on the lower side member 6 side of the side panel 3 into which the extension piece is fitted. Although it is configured, for example, as described in Patent Document 1, when a load support base fixing means having a configuration that does not interfere with fixing the side panel 3 on the side that is not folded in a parallel posture is adopted, A rocking restricting locking hole into which the protruding piece 18b at the end of the extending portion of the shim plate 18 is closely fitted may be provided on the lower side member 6 side of the side panel 3.

It is a perspective view explaining the basic composition of the foldable load carrier cart. Hereinafter, it is a figure showing a load carrier trolley concerning one embodiment of the present invention, and this figure is a top view showing a folded state of a load carrier trolley. FIG. A is a cross-sectional plan view showing the use state of the load carrying cart, and FIG. It is a cross-sectional top view which shows the state which isolate | separated the panel and the load support stand. It is a cross-sectional plan view which shows each panel of the isolate | separated state. It is an AA line expanded sectional view of FIG. It is a partially vertical side view which shows the support part structure of the side panel of the side which is not folded. It is a top view which shows the wheel mounting seat board. FIG. A is a sectional view taken along line BB in FIG. 8, and FIG. B is a sectional view taken along line CC in FIG. It is a cross-sectional top view which shows the state which switched the right-and-left both sides panel from the parallel attitude | position to the inclination attitude | position. It is a vertical side view which shows the state in the middle of rotating the load support stand to a horizontal posture. FIG. 6 is a partially cutaway front view of the main part showing a state when the side panel is swung to an inclined posture in a state where the load support base is turned down to a predetermined angle. FIG. 13 is a partial longitudinal sectional front view of a main part showing a state when the load supporting base is turned down from the state of FIG. 12 to a horizontal posture supported by the lower side member of the side panel. FIG. 14 is a partially longitudinal front view of a main part showing a state when the side panel is swung from the state of FIG. 13 to a parallel posture. It is a cross-sectional top view of the principal part of the state of FIG. It is a vertical side view which shows the whole load support stand of the state of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Load support stand 1a, 1b Recessed side surface 2 of load support stand Back panel 3, 4 Side panel 5a-5d Wheel 6 Lower side member 6b Horizontal plate part 7a of lower side member Vertical support | pillar 10a-10d of front side of side panel Wheel mounting seat Plates 11, 12 Bolt nuts 13a, 13b for mounting the wheel mounting seat plate Upper mounting surface 14 of the wheel mounting seat plate Lower mounting surface 15 of the wheel mounting seat plate Recessed step portions 18, 19 of the wheel mounting seat plate Shim plate 18a Shim Plate extension 18b Shim plate protrusions 20, 21 Vertical pins 22, 23 Bolt holes 24, 25 Lock holes 24a, 25a Lock plate portions 26, 27 Pin holes 28, 29 Connecting member 32 Lock pieces 33 Lock Means 34 Elevating lock member 35 Horizontal shaft rod 36 Operating portions 37a, 37b Elevating guide groove

Claims (1)

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. Shim plates are interposed and fixed between the left and right ends of the lower side member of the back panel, which are supported, and the wheel mounting seat plate disposed below the lower side member. A load carrying carriage fitted and supported by a vertical pin disposed on the wheel mounting seat plate protruding forward from the lower left and right ends of the lower side member of the lower side member. Shimpu adjacent to the side panel The sheet includes an extending part extending forward, and an upward projecting piece at the tip of the extending part. The projecting piece is disposed on the rear end side of the lower side member of the side panel that is not folded. A load-carrying locking hole is provided that fits upward, and the front end side of the lower side members of the left and right side panels is provided with a locking hole for locking the load support base supported by these lower side members. In the carriage, the lower side members of the left and right side panels are configured symmetrically with respect to the length direction so that they can be used by changing the direction of the left and right side panels. A foldable load carrying cart in which the locking hole that is not used is used as the rocking restriction locking hole provided on the side .