JP4807507B2 - Foldable transport cart - Google Patents

Description

  The present invention relates to a transporting carriage in which a cargo bed is erected on the inner side of a back panel, folded horizontally by being folded so that one side panel is overlapped on the inner side, and the entire carriage is folded into an L shape in a plan view. Is.

  This type of foldable transport cart includes a back panel having wheels attached to the lower sides of both ends via wheel mounting seats, a front panel connected to one side of the back panel in a perpendicular direction, and a wheel below the front end. A fixed side panel to which wheels are attached via a mounting seat, a movable side panel that is connected to the other side of the back panel so as to be horizontally rotatable and has wheels attached to the lower side of the front end via a wheel mounting seat; A loading platform connected to the lower side of the panel so that it can be raised and lowered, and the left and right sides of the loading platform in the lying position are below the stationary side panel and the movable side panel facing forward at right angles to the back panel. When the folded trolley is unfolded and assembled for use, the horizontally movable movable side panel on one side is positioned at a right angle with respect to the back panel. Orientation, that is, fixed side panel In a state where it is rotated to a parallel use posture, the loading platform in the standing posture must be turned down toward the front, and its left and right sides must be supported by the lower side of the fixed side panel and the lower side of the movable side panel. . In other words, the movable side panel can be rotated outward beyond the right-angled front-facing usage posture with respect to the back panel, so that the loader must be supported by the operator while the operator holds it in the usage posture. I must.

In order to save the labor of manually holding the movable side panel in the usage posture during the above assembly work, the movable side panel should be prevented from rotating outward beyond the usage posture that is perpendicular to the back panel. Has been tried. For example, the method described in Patent Document 1 is centered on the rotation center support shaft of the movable side panel on the wheel mounting seat on the lower side of one end of the back panel, which is used for pivotally supporting the movable side panel so as to be horizontally rotatable. An arc-shaped long hole extending approximately 90 degrees is provided, and a pin that engages with the long hole is attached to the lower side member of the movable panel. Further, as described in Patent Document 2, a stopper member protrudes on the wheel mounting seat or the side surface on the back panel side, and the movable side panel rotated to the use posture is brought into contact with the stopper member and stopped. The configuration is also known.
JP 2001-158362 A Registered Utility Model No. 3003019

  In the configuration using the arc-shaped long hole and the pin described in Patent Document 1, it is necessary to provide a long arc-shaped long hole extending 90 degrees outside the region actually used for wheel mounting of the wheel mounting seat. Therefore, the wheel mounting seat becomes very large, and a special wheel mounting seat has to be prepared, which greatly increases the cost and is not practical.

  Patent Document 2 discloses a configuration in which a stopper member that contacts the end edge of the movable side panel is provided on the wheel mounting seat, and a projecting portion that contacts the stopper member is provided continuously from the end of the movable side panel. In addition, a configuration in which a stopper member protrudes outside the wheel mounting seat is described, but in a configuration in which the edge of the movable panel abuts against the stopper member, the movable panel is vigorously rotated in the deployment direction. The pressing force acting between the stopper member and the movable side panel edge that comes into contact with the stopper member becomes large, and the reaction force at this time may damage the support shaft of the movable side panel. Further, in the configuration in which the protruding portion is continuously provided from the end portion of the movable side panel, the protruding portion protrudes laterally from the folded movable side panel, and further, the stopper member protrudes outside the wheel mounting seat. Configuration to install Is always ready to projection is projected to the lateral sides of the transport carriage, both supposed to hinder the safe handling of the truck, practical did not.

An object of the present invention is to provide a foldable transport cart that can solve the above-described conventional problems, and the foldable transport cart according to claim 1 will be described later. When the reference numeral of the embodiment is attached and shown, the back panel 1 in which the wheels 9a and 9b are attached to the lower sides of both ends via the wheel mounting seats 10a and 10b, and the front side of the back panel 1 is perpendicular to the one side. To the fixed side panel 2 to which the wheel 9c is attached via the wheel mounting seat 10c on the lower side of the front end, and to the other side of the back panel 1 so as to be horizontally rotatable and to the wheel mounting seat 10d on the lower side of the front end. A movable side panel 3 having wheels 9d attached thereto, and a cargo bed 4 connected to the lower side of the back panel 1 so as to be raised and lowered, and both left and right sides of the cargo bed 4 in the lying posture are fixed side panels. 2 lower side and right angle to back panel 1 In the folding carriage supported by the lower side of the movable side panel 3 in the direction, the lower side member 5 of the movable side panel 3 is inward from the lower side of the vertical plate part 5a to the horizontal plate part 5b. The horizontal plate portion 5b of the lower side member 5 is horizontally mounted by the vertical support shaft 16 on the wheel mounting seat 10b attached to the lower side end portion of the back panel 1. The lower side member 5 is provided with a notch 28 into which a fixing pin 27 that is rotatably supported and is fitted on the wheel mounting seat 10b in front of the vertical support shaft 16 is inserted. In the corner portion between the vertical plate portion 5a and the horizontal plate portion 5b of the lower side member 5, a long hole in which both the upper end on the vertical plate portion 5a side and the inner end on the horizontal plate portion 5b side are closed. Jo the formed, the fixed inner end of the horizontal plate portion 5b side of the notch 28 The contact of the emission 27, wherein the movable side panels 3 has a configuration to prevent the rotation outward beyond the use position perpendicular forward facing against the back panel 1.

  According to the foldable transport carriage according to the present invention having the above-described configuration, it is sufficient to project one pin on the wheel mounting seat side on the back panel side, and it is possible to move the movable panel without particularly increasing the wheel mounting seat. Can be sufficiently separated from the spindle. Therefore, not only can the conventional wheel mounting seat be used as it is, but also when the movable side panel that has reached the use posture is stopped by the pin, such as when the edge of the movable side panel is brought into contact with the stopper member. A large pressing force does not act and sufficient durability can be obtained. Furthermore, there is no protrusion that protrudes outward when the movable panel is folded, and there is no protrusion that always protrudes outward from the wheel mounting seat, and the carriage can be handled safely. In addition, since the notch is formed at the corner between the vertical plate and the horizontal plate of the angle member constituting the lower side of the movable side panel, that is, at a location having sufficient bending strength, the movable side panel The strength of the lower side is not lowered to a problem, and in this respect, a foldable transport cart that is excellent in durability and can be sufficiently put to practical use can be configured at low cost.

  A specific embodiment of the present invention will be described below with reference to the accompanying drawings. In FIGS. 1 and 2, 1 is a back panel, 2 is a fixed side panel, 3 is a movable side panel, and 4 is a loading platform. The back panel 1 and the left and right side panels 2 and 3 each have a gate-shaped peripheral frame 6 made of a round pipe material bent into a gate shape on a lower side member 5 using an angle material. A plurality of vertical members 7 and a plurality of cross members 8 are laid in a lattice shape in a rectangular region surrounded by the side member 5 and the gate-shaped peripheral frame 6.

  As shown in FIG. 3, wheels (universal wheels, orientation-fixed wheels, etc.) 9a are provided on the lower side of both ends of the back panel 1 and the lower side of the front ends of the left and right side panels 2, 3 via wheel mounting seats 10a to 10d, respectively. ~ 9d are attached. That is, on both lower sides of the lower side member 5 of the back panel 1, the wheel mounting seats 10 a and 10 b are attached with two bolts and nuts 11 so as to protrude only inward (front) in plan view. Below the front end of the lower side member 5 of the panel 2, the wheel mounting seat 10c is attached with two bolts and nuts 12 so as to protrude only inward (on the movable side panel 3 side) in plan view. Below both ends of the lower side member 5 of the panel 3, a wheel mounting seat 10d is attached with two bolts and nuts 13 so as to protrude only inward (on the fixed side panel 2 side).

  The fixed side panel 2 includes a vertical support shaft 14 and a bolt nut 15 on a wheel mounting seat 10a protruding forward from the lower side member 5 of the back panel 1 at the rear end portion of the lower side member 5. The front panel is fixed to the back panel 1 at a right angle. The movable side panel 3 has a lower side of the back panel 1 at the rear end of the lower side member 5, specifically, at the rear end of the horizontal plate portion 5 b of the angle member constituting the lower side member 5. On the wheel mounting seat 10b protruding forward from the member 5, it is connected horizontally around the vertical support shaft 16 so as to be freely rotatable. As shown in FIG. 3, the left column 6 a of the portal frame 6 of the back panel 1 and the rear column 6 b of the portal frame 6 of the fixed panel 2 are sufficiently close to each other. In contrast, the right column 6b of the portal peripheral frame 6 of the back panel 1 and the rear column 6b of the portal peripheral frame 6 of the movable panel 3 are sufficiently separated from each other. Further, the vertical support shaft 14 is concentrically fitted in the rear column portion 6 b of the portal peripheral frame 6 of the fixed side panel 2, and the vertical support shaft 16 is connected to the portal peripheral frame 6 of the movable side panel 3. It is inserted concentrically in the rear column 6b.

  As shown in FIGS. 1 and 2, the left and right support columns 6 a and 6 b of the portal peripheral frame 6 of the back panel 1 and the rear support column 6 b of the portal peripheral frame 6 of the left and right panels 2 and 3 are respectively The two upper and lower connecting members 18 and 19 are connected. These connecting members 18 and 19 are fixed to the left and right side column parts 6a and 6b on the back panel 1 side so as not to be horizontally swingable, and to the left and right side panels 2 and 3 side rear column part 6b. Are loosely fitted in a state allowing rotation around the axis of the rear column portion 6b.

  As shown in FIG. 3, the loading platform 4 has a pair of left and right hinges 20 each having a concentric horizontal support shaft at both left and right ends overlapping the wheel mounting seats 10 a and 10 b of the lower side member 5 of the back panel 1. It is pivotally supported up and down freely. Thus, the left and right sides of the loading platform 4 are supported on the lower side members 5 of the left and right side panels 2 and 3 by causing the loading platform 4 to fall down to a horizontal state around the horizontal support shaft of the hinge 20. Is done. The locking means 21 is for locking the front end portions of the left and right sides of the horizontally loaded cargo bed 4 to the lower side members 5 of the left and right side panels 2 and 3. Hooks 22a and 22b projecting from the side member 5, engagement holes 23a and 23b provided so that the hooks 22a and 22b are fitted on the left and right sides of the loading platform 4, and the engagement holes 23a and 23b It is comprised from the horizontal and horizontal lock bar 24 which was built in the loading platform 4 so that engagement with the hooks 22a and 22b inserted in was carried out freely.

  The lock bar 24 can be moved back and forth in parallel, and is urged rearward. The left and right sides of the loading platform 4 are laid down so that the hooks 22a and 22b fit into the engagement holes 23a and 23b. When supported on the lower side member 5 of the both side panels 2 and 3, both ends of the lock bar 24 are automatically engaged with the lower sides of the hooks 22a and 22b to lock the loading platform 4. In order to disengage both ends of the lock bar 24 forward from the hooks 22 a and 22 b when folded, an operation lever 25 for forcibly moving the lock bar 24 forward is used as the operation means of the locking means 21. The lock bar 24 is moved forward by moving the operation lever 25 upward, and both ends of the lock bar 24 are detached from the hooks 22a and 22b, and the loading platform 4 is moved upward. It can be dynamic standing. Since the locking means 21 and the operating means are not related to the object and configuration of the present invention, a detailed description of the structure and operation is omitted, but may be of any structure, for example, the loading platform 4 When the left and right sides are supported on the lower side members 5 of the left and right side panels 2 and 3, the operation lever 25 must be operated to engage both ends of the lock bar 24 with the hooks 22a and 22b. It may be a configuration.

  In the foldable transport cart having the above-described configuration, according to the present invention, the movable side panel 3 is disposed between the rear end portion of the movable side panel 3 and the wheel mounting seat 10b on the back panel 1 side that pivotally supports the movable side panel 3. A rotation limiting means 26 is provided for preventing the panel 3 from rotating outward beyond the right-angled front-facing use posture with respect to the back panel 1.

As shown in detail in FIGS. 3B and 3C, the rotation limiting means 26 is provided on the fixed pin 27 erected on the wheel mounting seat 10 b on the back panel 1 side and the lower side member 5 of the movable side panel 3. And a cut 28 formed therein. That is, the fixing pin 27 is a vertical support shaft in a region overlapping with the lower side member 5 of the movable side panel 3 in the use posture in a right angle front direction with respect to the back panel 1 on the wheel mounting seat 10b on the back panel 1 side. The fixed projection is provided at a position as far as possible from 16. The notch 28 is formed at the corner between the vertical plate portion 5a of the angle member constituting the lower side member 5 of the movable side panel 3 and the horizontal plate portion 5b projecting inward from the lower side of the vertical plate portion 5a. The movable plate 3 is formed in a closed hole shape in which both the upper end on the vertical plate portion 5a side and the inner end on the horizontal plate portion 5b side are closed. When rotating in a direction away from 1, the fixed pin 27 relatively enters the notch 28, and when the movable side panel 3 is positioned at a right angle forward with respect to the back panel 1, the fixed pin 27 is It is formed so as to contact the inner end of the cut 28 , that is, the inner end of the horizontal hole portion on the horizontal plate portion 5 b side .

  According to the above configuration, when folding a transport carriage that is not to be transported, as described above, the operation lever 25 is operated to move the lock bar 24 forward, and both ends thereof are connected to the left and right side panels 2, 3. In a state where the loading platform 4 is released from the side hooks 22a and 22b and the loading means 4 is unlocked by the locking means 21, the loading platform 4 is rotated upward and overlaps the inside of the back panel 1. In this state, the movable side panel 3 is rotated inwardly around the vertical support shaft 16 so that the upright loading platform 4 is sandwiched between the back panel 1 and the movable side panel 3 as shown in FIG. You can do it.

  When unfolding and assembling the folded transport carriage for transportation, the movable side panel 3 is rotated outward around the vertical support shaft 16, but the movable side panel 3 is perpendicular to the back panel 1. When the forward use posture is reached, the fixing pin 27 on the back panel 1 side (wheel mounting seat 10b side) is relatively fitted into the cut 28 of the lower side member (angle member) 5 of the movable side panel 3. Thus, it abuts against the inner end of the cut 28, and the rotation of the movable panel 3 is stopped in the use posture. In this state, the loading platform 4 may be turned downward and the left and right sides may be supported on the lower side members 5 of the left and right panels 2 and 3. At this time, since the movable side panel 3 does not rotate outward beyond the use posture by the rotation restricting means 26, the movable side panel 3 is urged by hand in a direction to open outward as necessary. If the loading platform 4 is laid down, the hooks 22a and 22b on both the left and right panels 2 and 3 are securely inserted into the pair of left and right engagement holes 23a and 23b on the loading platform 4 side. At this time, the hooks 22a and 22b of the locking means 21 and the both ends of the lock bar 24 are automatically engaged, or the hooks 22a and 22b and the both ends of the lock bar 24 are engaged by operating the operation lever 25. As a result, the left and right sides of the loading platform 4 and the lower side members 5 of the left and right panels 2 and 3 are joined, and the assembly is completed.

It is a perspective view which shows the whole trolley | bogie for conveyance. It is a top view which shows the state which folded the conveyance trolley | bogie. Fig. A is a partially cutaway plan view of a part of the carriage for transportation, Fig. B is an enlarged partial cross-sectional plan view of the main part, and Fig. C is an enlarged side view of the main part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Back panel 2 Fixed side panel 3 Movable side panel 4 Loading platform 5 Lower side member (angle material) of each panel
10a to 10d Wheel mounting seats 14, 16 Vertical support shaft 20 Hinge 21 Locking means 22a, 22b Hook 23a, 23b Engagement hole 24 Lock bar 25 Operation lever 26 Rotation limiting means 27 Fixing pin 28 Notch

Claims (1)

A back panel with wheels attached to the lower sides of both ends via wheel mounting seats, and a fixed body that is connected to one side of the back panel in a right-angled front direction and has wheels attached to the lower side of the front ends via wheel mounting seats. A side panel, a movable side panel that is connected to the other side of the back panel so as to be horizontally rotatable and a wheel is attached to the lower side of the front end via a wheel mounting seat, and a lower side of the back panel is connected to the lower side of the back panel. Folding transport that is supported by the lower side of the fixed side panel and the lower side of the movable side panel that is perpendicular to the back panel. In the trolley, the lower side member of the movable side panel is composed of an angle member in which the horizontal plate portion projects inward from the lower side of the vertical plate portion, and the rear end of the horizontal plate portion of the lower side member is the back panel. On the wheel mounting seat attached to the lower side edge of Is pivotally supported horizontally rotated by a straight shaft, the forward side of the vertical pivot notch fixing pins projecting from the top of the wheel mounting seat is fitted is provided on the lower edge member, the cuts, At the corner between the vertical plate portion and the horizontal plate portion of the lower side member, an upper end on the vertical plate portion side and an inner end on the horizontal plate portion side are both formed in a long hole shape, The movable side panel is configured to be prevented from rotating outward beyond a right-angled front-facing use posture with respect to the back panel by the contact between the inner end of the notch on the horizontal plate portion side and the fixing pin. A foldable transport cart.

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