Conveyance dolly

Abstract

To enable stoppers of caster wheels with stoppers disposed at corners of the lower surface of a dolly body to be visually checked.SOLUTION: A dolly body 3 is formed by attaching a top plate 5 to an upper surface of a rectangular frame 4 and attaching a bottom plate 6 to a lower surface of the frame, and caster wheels 7 with stoppers are attached to a lower surface of the bottom plate 6 at both corners of at least one side of the dolly body 3. A gap S above a stopper 8 is provided between the bottom plate 6 and a frame material forming the side of the frame 4, a space recess P is formed in the corner of the top plate 5 to make the gap S open upward, and the stopper 8 of the caster wheel 7 is located inside the outer surface of the corner of the dolly body 3, below the gap S and the space recess P that communicate in the vertical direction.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a transport cart for carrying and transporting luggage. [Background technology]

[0002] A transport trolley is constructed by attaching a top plate to the top of a square frame and a bottom plate to the bottom to form the trolley body, and wheels are attached to the underside of the four corners of this trolley body. Some trolleys use caster wheels with stoppers (brakes).

[0003] When caster wheels with stoppers (brakes) are attached to the underside of the corners of the trolley body, they are hidden in the corners and are difficult to check their position from above, which can also cause problems with operating the stopper (brake) pedal.

[0004] The transport cart disclosed in Patent Document 1 has four corners of the cart body, and the corner members of the corner members having braked casters on their reverse side are colored a different color from the corner members of the corner members having non-brake casters on their reverse side (Claim 1); alternatively, the operating part of one end of the brake pedal supported by the support yoke of the caster wheel is made to be visible from the periphery of the cart body in a plan view when the wheel is facing forward or backward when the brake is released (Claim 4).

[0005] The caster with a locking mechanism disclosed in Patent Document 2, which can be used as the caster wheel with a stopper (brake), is a caster formed by thrust bearings on a pivot between a swivel base and a mounting base formed on the upper part of a pair of support yokes that support the wheels of the caster, and includes an operating lever mounting bracket plate fixed to the mounting base so as to extend to the side of the mounting base, an operating lever pivotally supported on the operating lever mounting bracket plate, a stopper member that is provided integrally with the operating lever and has a braking stopper surface and a non-braking stopper surface, and an axis of the pivot. The brake shoe pressing member is pivotally attached to the support yoke and displaces in conjunction with the rising and falling of the operating pin to a braking position where the brake shoe is pressed against the wheel circumferential surface and a braking release position where the brake shoe is released from the brake shoe pressing position (Claim 1). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 5646260 [Patent Document 2] Patent No. 3243730 Summary of the Invention [Problem to be solved by the invention]

[0007] The former prior art allows the presence of caster wheels with stoppers (brakes) to be confirmed by coloring, but causes the problem that it is difficult to know in which direction the stopper pedal operation part is located relative to the wheels. Exposing the stopper pedal operation part from the periphery of the dolly body makes it possible to know the position of the stopper pedal operation part, but creates a new problem that the exposed stopper pedal operation part may collide with structures or other objects around the work area.

[0008] In addition, in the former prior art, since the stopper pedal is supported by the support yoke of the caster wheel, its direction changes as the caster wheel turns, so it is necessary to orient the caster wheel and the stopper pedal in the forward / rearward direction.

[0009] This problem can be solved by having the stopper pedal supported on the mounting base that rotatably supports the support yoke that supports the caster wheels. However, if the operation part of the stopper pedal is located inside the outer surface of the dolly body, the problem of its presence being difficult to confirm from the outside reoccurs.

[0010] An object of the present invention is to provide a transport cart that can solve the problems of the conventional technology.

[0011] The present invention aims to provide a transport cart in which gaps and spatial recesses that penetrate vertically at the corners of the cart body are formed, making it possible to visually observe the stoppers of the stopper-equipped caster wheels located on the underside of the corners. [Means for solving the problem]

[0012] The specific means for solving the problems in the present invention is to form a trolley body 3 by attaching a top plate 5 to the upper surface of a rectangular frame 4 and a bottom plate 6 to the lower surface, and to attach caster wheels 7 with stoppers to the lower surface of the bottom plate 6 at the corners on both sides of at least one side of the trolley body 3, A gap S is provided between the frame material forming the side of the underframe 4 and the bottom plate 6, and a space recess P is formed at the corner of the top plate 5 to open the gap S upward. A stopper 8 of the caster wheel 7 is disposed inside the outer surface of the corner of the cart body 3 and below the gap S and spatial recess P which communicate in the vertical direction. Effect of the Invention

[0013] According to the present invention, the stopper 8 of the stopper-equipped caster wheel 7 arranged on the underside of the corner of the cart body 3 can be visually confirmed via the gap S and the spatial recess P which communicate in the vertical direction. [Brief description of the drawings]

[0014] [Figure 1] FIG. 1 is a front view showing an embodiment of the present invention. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] FIG. 4 is an enlarged plan view of a corner of the cart body. [Figure 6] 3 is a cross-sectional view taken along line XX in FIG. 2. [Figure 7] 1 is a cross-sectional view of the caster wheel when the stopper is released. FIG. [Figure 8] 1 is a cross-sectional view of the caster wheel when the stopper is braked. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0016] In Figures 1 to 6, the transport cart 1 has a top plate 5 attached to the upper surface of a rectangular (oblong, square) frame 4 and a bottom plate 6 attached to the underside of the square frame to form the cart body 3, and caster wheels 7 with stoppers are attached to the underside of the bottom plate 6 at both corners of at least one side of the cart body 3 (in this embodiment, six places: the four corners and the center of the long sides).

[0017] The transport cart 1 has a rectangular shape that is long in the direction of transport and movement, with the longitudinal direction being the vertical direction, with the frame members that are long in the longitudinal direction being called vertical frame members 11, and the direction perpendicular to this being the horizontal direction, with the frame members that are long in the horizontal direction being called horizontal frame members 12. However, the length and width of the frame 4 may be reversed, with the vertical frame members being called horizontal frame members and the horizontal frame members being called vertical frame members.

[0018] The underframe 4 is formed into a rectangular shape (rectangular shape) in a plan view by connecting two parallel vertical frame members 11 (frame members that are long vertically in Figure 2) and two parallel horizontal frame members 12 with four corner members 13, and at least two vertical cross members 14 are provided between the two horizontal frame members 12, with both ends connected to the horizontal frame members 12. A top plate 5 is fixed to the upper surfaces of the vertical frame members 11, the horizontal frame members 12 and the vertical cross members 14.

[0019] The vertical frame members 11, horizontal frame members 12 and vertical crosspiece members 14 are formed into a square pipe shape from an aluminum alloy or the like, and the corner members 13 are also extruded from an aluminum alloy and have holes 13a passing through them in the vertical direction, into which the handle support 16 can be inserted.

[0020] The corner member 13 is formed with a cylindrical portion 13A into whose inner circumference the lower end of the handle support 16 can be inserted, a pair of vertical connecting pieces 13B that connect the vertical frame material 11 by sandwiching it therebetween, and a pair of horizontal connecting pieces 13C that connect the horizontal frame material 12 by sandwiching it therebetween, which are long from top to bottom.

[0021] Three pairs of parallel mounting bodies 21 that form a bottom plate 6 between two horizontal frame members 12 are installed on the undersides of the vertical frame members 11, horizontal frame members 12, and vertical bar members 14. Two mounting bodies 21 in each pair are arranged as mirror images, and one mounting body 21 has a reinforcing rib 21a protruding from the underside of the flat plate portion and a high vertical wall 21b protruding upward from one side edge of the flat plate portion. The vertical wall 21b faces the horizontal frame members 12, and the other side edge of the flat plate portion without the vertical wall 21b faces the other mounting body 21 in an abutting manner.

[0022] The pair of mounting bodies 21 have both longitudinal ends of the flat plate portion fixed to the undersides of the vertical frame material 11 and the vertical crosspiece material 14, and the vertical walls 21b fixed to or in contact with the side surfaces of the vertical frame material 11 and the vertical crosspiece material 14. The mounting bases 31 of the stopper-equipped caster wheels 7 are fixed to the undersides of the pair of mounting bodies 21 via fasteners 22 such as bolts at positions corresponding to six positions of the four corners and the center of the long sides of the trolley body 3.

[0023] The pair of mounting bodies 21 are interconnected by fixing the mounting base 31, and the position of the trolley body 3 relative to the horizontal frame member 12 is also specified, and a gap S is formed between the side of the horizontal frame member 12 and the vertical wall 21b of the mounting body 21 on the horizontal frame member 12 side.

[0024] The top plate 5 on the upper surface of the frame 4 is formed from a flat aluminum plate, and the upper surface serves as a surface for placing luggage. The top plate 5 is cut out in six places to form a spatial recess P on the upper surface of the frame 4, exposing the fixed portion of the mounting base 31 of the lower mounting body 21. These six spatial recesses P provide space to accommodate the six wheels 7a of the upper transport cart 1 when another transport cart 1 is placed on top of the transport cart 1.

[0025] The spatial recess P of the tabletop 5 reaches the horizontal frame member 12, and opens upward the gap S between it and the vertical wall 21b of the mounting body 21 on the horizontal frame member 12 side. In other words, the spatial recess P and the gap S penetrate vertically between the horizontal frame member 12 and the mounting body 21 at a location corresponding to the stopper-equipped caster wheel 7, so that the stopper 8 of the caster wheel 7 can be seen from above.

[0026] 1 to 8, the stopper-equipped caster wheel 7 has a swivel base 34 provided on the upper part of a bifurcated support yoke 33 that supports the wheel 7a for free rotation via a support shaft, the mounting base 31 is fixed to the mounting body 21, the swivel base 34 is supported on the swivel receiving portion of the mounting base 31 via a thrust bearing 35, and the underside of the swivel base 34 is supported by a thrust receiving body 36 via a ball, and the swivel base 34 and thrust bearing 35 are fitted and attached to a swivel shaft 37 provided on the mounting base 31, so that the support yoke 33 is rotatably supported on the swivel shaft 37.

[0027] The stopper mechanism F has a stopper (brake operating member) 8 with a two-stage lever structure having a first stopper lever 8A and a second stopper lever 8B, an operating rod 38 that is moved up and down by the end of the second stopper lever 8B, and a brake member 39 that changes from a released state to a braked state when the operating rod 38 moves downward.

[0028] The upper surface of the first stopper lever 8A is an operating surface that can be stepped on by foot, and its base is supported via a pin 41 at the tip of a lever support portion 31a that protrudes outward from the mounting base 31 so that it can swing up and down, and a cam portion 8c is formed at the base.

[0029] The second stopper lever 8B is formed by bending a strip of plate material into an approximate Z shape when viewed from the side, with its tip abutting the cam portion 8c so that it can be pushed upward by rotation of the cam portion 8c, and its end being connected to the upper part of the operating rod 38 so that it can push the operating rod 38 downward.

[0030] The second stopper lever 8B has a bent portion 8d at its middle portion in contact with a fulcrum portion 31b provided on the mounting base 31, forming a fulcrum that converts the upward movement of the tip of the second stopper lever 8B into downward movement of the operating rod 38 at the end.

[0031] The second stopper lever 8B is disposed within the mounting base 31 from its end to its middle, and is bent significantly outwardly and downwardly from a bent portion 8d that abuts against the fulcrum portion 31b, with its tip abutting against the cam portion 8c of the first stopper lever 8A. The cam portion 8c and the pin 41 are disposed at substantially the same height as the braking member 39, and therefore the first stopper lever 8A is positioned at a sufficient distance from the bottom surface of the carriage body 3, and a sufficient gap L is secured between the first stopper lever 8A and the bottom surface of the carriage body 3 for inserting the toe when stepping on it.

[0032] The operating rod 38 is inserted into a through hole formed in the axis of the pivot shaft 37 so as to be able to move up and down freely, is biased upward by a spring 42 fitted to the upper part, is engaged with the end of the second stopper lever 8B, and has its lower end abutted against a recess in the pushing body 39b of the braking member 39.

[0033] The braking member 39 has a pusher 39b that is pivoted to the support yoke 33 via a pivot shaft 39a and has a recess against which the lower end of the operating rod 38 abuts at a position offset from the pivot shaft 39a, and a pressing member 39c that is pressed against the outer peripheral surface of the wheel 7a when the pusher 39b tilts.The braking member 39 is configured such that when the operating rod 38 moves downward and the pusher 39b tilts, the pressing member 39c is pressed against the outer peripheral surface of the wheel 7a, thereby braking (stopping action, braking action) the wheel 7a.

[0034] The braking member 39 is arranged so that the pressing member 39c is located substantially directly above the wheel 7a and substantially directly below the swivel base 34 and the thrust bearing 35, and is capable of converting the downward moving force of the operating rod 38 into a wheel braking force of the pressing member 39c. The cam portion 8c and pin 41 of the first stopper lever 8A are disposed at substantially the same height as the braking member 39 and the upper part of the wheel 7a.

[0035] In the stopper-equipped caster wheel 7, the support yoke 33 is rotatable relative to the mounting base 31, so the wheel 7a is also rotatable, but since the mounting base 31 is fixed to the mounting body 21, the stopper mechanism F is fixed in position.

[0036] The stopper-equipped caster wheels 7 at the four corners of the trolley body 3 are arranged so that the first stopper lever 8A and the second stopper lever 8B of the stopper 8 are long in the direction of movement of the trolley body 3, and the first stopper lever 8A is positioned outside the second stopper lever 8B so that it can be stepped on from the front, rear, and outside of the trolley body 3.

[0037] In the case of a caster wheel 7 with stoppers arranged in the longitudinal center of the rectangular trolley body 3, the first stopper lever 8A and the second stopper lever 8B of the stopper 8 are arranged long in a direction perpendicular to the longitudinal direction of the trolley body 3, and the first stopper lever 8A is arranged outside the second stopper lever 8B so that it can be stepped on from the outside side of the trolley body 3.

[0038] In the above-described embodiment, the trolley body 3 is formed by attaching a top plate 5 to the upper surface of a rectangular underframe 4 and a bottom plate 6 to the underside, and caster wheels 7 with stoppers are attached to the underside of the bottom plate 6 at both corners of at least one side of the trolley body 3. A gap S is provided above the stoppers 8 between the frame material forming the side of the underframe 4 and the bottom plate 6, and a space recess P is formed at the corner of the top plate 5 to open the gap S upward. The stoppers 8 of the caster wheels 7 are positioned inside the outer surface of the corner of the trolley body 3, below the gap S and space recess P which are connected in the vertical direction.

[0039] With this configuration, the stopper 8 of the stopper-equipped caster wheel 7 arranged on the underside of the corner of the cart body 3 can be visually confirmed via the gap S and the spatial recess P that communicate in the vertical direction.

[0040] In addition, in the above embodiment, the trolley body 3 is formed into a rectangular shape in a plan view by connecting two parallel vertical frame members 11 and two parallel horizontal frame members 12 with four corner members 13, and at least two vertical bar members 14 are provided between the two vertical frame members 11, with both ends connected to the horizontal frame members 12. A top plate 5 is fixed to the upper surfaces of the vertical frame members 11, horizontal frame members 12 and vertical bar members 14, and a spatial recess P is formed in this top plate 5. Multiple pairs of parallel mounting bodies 21 which form a bottom plate 6 between the two horizontal frame members 12 are erected on the lower surfaces of the vertical frame members 11, horizontal frame members 12 and vertical bar members 14, and the mounting body 21 closest to the horizontal frame member 12 has a vertical wall 21b facing the horizontal frame member 12, and a gap S which communicates with the spatial recess P above the stopper 8 is formed between the horizontal frame member 12 and the vertical wall 21b.

[0041] With this configuration, the mounting body 21 for attaching the stopper-equipped caster wheel 7 can be positioned away from the horizontal frame material 12, thereby forming a gap S between the two, which communicates with the spatial recess P of the table top 5 and allows the stopper 8 to be visible from above.

[0042] Furthermore, in the above embodiment, the frame 4 of the trolley body 3 is formed in a rectangular shape, and caster wheels 7 with stoppers are attached to the four corners at both ends in the longitudinal direction and at the center, and the caster wheels 7 with stoppers 7 at the four corners are arranged so that their stoppers 8 face outward from the swivel axis 37 and are along the longitudinal direction of the frame 4, and the caster wheels 7 with stoppers 7 at the center are arranged so that their stoppers 8 face outward from the swivel axis 37 and are perpendicular to the longitudinal direction of the frame 4.

[0043] With this configuration, caster wheels 7 with stoppers can be attached to the four corners and the center in the longitudinal direction of the rectangular cart body 3, making it possible to brake the wheels 7a at a maximum of six locations in total.

[0044] Furthermore, in the embodiment, the stopper-equipped caster wheel 7 has a swivel base 34 provided on the upper part of a bifurcated support yoke 33 supporting the wheel 7a, a mounting base 31 is fixed to the underside of the bottom plate 6, and the swivel base 34 and the support yoke 33 are supported on the mounting base 31 so as to be rotatable about a swivel shaft 37. The stopper 8 has a two-stage lever structure having a first stopper lever 8A and a second stopper lever 8B, an operating rod 38 which is moved up and down by the end of the second stopper lever 8B, and a braking member 39 which is changed from a released state to a braking state with respect to the wheel 7a by the downward movement of the operating rod 38. The first stopper lever 8A has an upper surface which serves as an operating surface that can be stepped on by foot, and is supported on the tip of a lever support part 31a protruding outward from the mounting base 31 so as to be able to swing up and down. a cam portion 8c is formed at its base, the tip of the second stopper lever 8B abuts against the cam portion 8c and can be pushed upward by rotation of the cam portion 8c, the end of the second stopper lever 8B is connected to the upper part of the braking member 39 and can push the operating rod 38 downward, a bent portion 8d at the middle abuts against a fulcrum portion 31b provided on the mounting base 31 and forms a fulcrum for converting the upward movement of the tip of the second stopper lever 8B into the downward movement of the operating rod 38 at the end, the tip of the second stopper lever 8B is located below the spatial recess P and the gap S, and the second stopper lever 8B is disposed within the mounting base 31 from the middle to the end, and the cam portion 8c of the first stopper lever 8A and the tip of the second stopper lever 8B are disposed at approximately the same height as the braking member 39 which abuts against the wheel 7a.

[0045] With this configuration, the stopper 8 can be positioned with the first stopper lever 8A, which has an operating surface, pulled downward away from the underside of the cart body 3, and even if the stopper 8 does not protrude outward from the corner of the cart body 3, it becomes possible to place the foot under the cart body 3 and step on the stopper 8.

[0046] The present invention is not limited to the above-described embodiment, and the shape, configuration, and combination of the members can be changed.

[0047] For example, when the cart body 3 is rectangular and caster wheels are used in six places, the caster wheels 7 with stoppers may be used only in the corners on both sides of one side of the cart body 3.

[0048] When the stopper-equipped caster wheel 7 is disposed in the longitudinal center of the cart body 3, an opening through which the first stopper lever 8A can be seen from above may be formed in the mounting body 21 to which it is attached. [Explanation of symbols]

[0049] 1 Transport cart 3. Cart body 4 Frame 5. Tabletop 6 Bottom plate 7 Caster wheels 7a wheels 8 Stopper 8A First stop lever 8B Second stopper lever 8c Cam section 11 Vertical frame material 12 Horizontal frame material 13 Corner member 14 Vertical beams 21 Mounting body 21a Reinforcement rib 21b Vertical wall 22 Fasteners 31 Mounting base 31a Lever support 31b Fulcrum part 33 Support yoke 34 Swivel table 35 Thrust bearing 37 Swivel Axis 38 Operating rod 39 Braking members 39c Pressing member 42 Spring F Stopper mechanism P Space recess S Gap

Claims

1. A top plate (5) is attached to the upper surface of a rectangular frame (4) and a bottom plate (6) is attached to the lower surface to form a trolley body (3), and caster wheels (7) with stoppers are attached to the lower surface of the bottom plate (6) at both corners of at least one side of the trolley body (3); A gap (S) is provided between the frame material forming the side of the underframe (4) and the bottom plate (6) to be above the stopper (8); A space recess (P) is formed at a corner of the top plate (5) to open the gap (S) upward, A transport cart characterized in that a stopper (8) of the caster wheel (7) is positioned inside the outer surface of the corner of the cart body (3) and below the gap (S) and spatial recess (P) which are connected in the vertical direction.

2. The trolley body (3) is formed in a rectangular shape in a plan view by connecting two parallel vertical frame members (11) and two parallel horizontal frame members (12) with four corner members (13), at least two vertical cross members (14) are provided between the two vertical frame members (11), both ends of which are connected to the horizontal frame members (12), a top plate (5) is fixed to the upper surfaces of the vertical frame members (11), the horizontal frame members (12) and the vertical cross members (14), and a spatial recess (P) is formed in the top plate (5); The transport cart according to claim 1, characterized in that a plurality of pairs of parallel mounting bodies (21) which form a bottom plate (6) between two horizontal frame members (12) are installed on the undersides of the vertical frame members (11), horizontal frame members (12) and vertical bar members (14), and the mounting body (21) closer to the horizontal frame member (12) has a vertical wall (21b) which faces the horizontal frame member (12), and a gap (S) which communicates with the spatial recess (P) above the stopper (8) is formed between the horizontal frame member (12) and the vertical wall (21b).

3. The trolley body (3) has a frame (4) formed in a rectangular shape, and caster wheels (7) with stoppers are attached to the four corners at both ends in the longitudinal direction and at the center.

2. The transport trolley according to claim 1, characterized in that the stopper-equipped caster wheels (7) at the four corners are arranged so that their stoppers (8) face outward from the swivel axis (37) and are aligned along the longitudinal direction of the frame (4), and the stopper-equipped caster wheel (7) at the center is arranged so that its stopper (8) faces outward from the swivel axis (37) and is perpendicular to the longitudinal direction of the frame (4).

4. The stopper-equipped caster wheel (7) has a swivel base (34) provided on the upper part of a bifurcated support yoke (33) that supports the wheel (7a), a mounting base (31) is fixed to the lower surface of the bottom plate (6), and the mounting base (31) supports the swivel base (34) and the support yoke (33) rotatably about a swivel shaft (37); The stopper (8) has a two-stage lever structure including a first stopper lever (8A) and a second stopper lever (8B), an operating rod (38) that is moved up and down by the end of the second stopper lever (8B), and a braking member (39) that changes from a released state to a braking state with respect to the wheel (7a) by the downward movement of the operating rod (38), The first stopper lever (8A) has an upper surface that serves as an operating surface that can be stepped on by foot, and is supported on the tip of a lever support portion (31a) that protrudes outward from the mounting base (31) so as to be capable of swinging up and down, and a cam portion (8c) is formed on the base portion. The tip of the second stopper lever (8B) abuts against the cam portion (8c) and can be pushed upward by the rotation of the cam portion (8c), and the end is connected to the upper part of the braking member (39) and can push the operating rod (38) downward, and the bent portion (8d) at the middle abuts against a fulcrum portion (31b) provided on the mounting base (31) to form a fulcrum that converts the upward movement of the tip of the second stopper lever (8B) into the downward movement of the operating rod (38) at the end, and the tip of the second stopper lever (8B) is located below the spatial recess (P) and the gap (S), and the middle to the end are arranged within the mounting base (31), A transport cart as described in any one of claims 1 to 3, characterized in that the cam portion (8c) of the first stopper lever (8A) and the tip of the second stopper lever (8B) are positioned at approximately the same height as the braking member (39) that abuts against the wheel (7a).

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