Conveyance carriage

Abstract

To provide a conveyance carriage that includes a carriage body formed in a substantially rectangular shape elongated in a front-back direction and pivotal casters attached on the back side of corner portions of the carriage body and that can promptly grasp the presence of braking.SOLUTION: A carriage body includes corner members 5, and pivotal casters each include a brake pedal 17 for locking the rotation of a wheel 2a. The brake pedal 17 includes an operation part 18 to be pressed by one's foot at the time of braking and be pushed up by one's foot at the time of releasing the brake, and is located closer to the center side in a left-right direction of the carriage body than the insertion hole when the wheel 2a is oriented in the front-back direction in planar view. The operation part 18 is located behind the wheel a in a state where the wheel 2a is oriented in the front-back direction at the time of releasing the brake, and is located further below a lower end located below a frame of the corner member 5. The wheel is overlapped with the carriage body without protruding out from the carriage body in planar view.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a transport cart. [Background technology]

[0002] The applicant has proposed a transport cart for carrying and transporting cargo, which can be stably transported even on uneven ground, as shown in the following patent document. [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-220653

[0003] As shown in Figures 10 to 12, this is a trolley body consisting of a frame 6 made of square pipes made of iron or aluminum alloy and a base 7, which is a loading plate made of iron or aluminum alloy joined to the top of this frame 6, and casters 2 with wheels 2a attached to bases 2b so that they can rotate freely are provided on the underside of the trolley body.

[0004] The frame 6 is formed into a lattice shape by butt welding square pipes in the vertical and horizontal directions, and on the underside of this lattice-shaped frame 6, mounting plates 9 for the casters 2 are attached with blind rivets 10 to sections 8 where the casters 2 are expected to be attached. The mounting plates 9 are attached to a total of six locations, excluding the six locations in the central sections 8 on the left and right.

[0005] In this transport cart, in which casters 2 are attached to at least four corners of the periphery of the rear surface of the cart body having the base 7 attached to the frame 6, two or more casters 2 are provided in a vertical row in the same direction as the direction of travel when in use, inside the outline connecting the swivel casters 2 attached to at least the four corners. These casters 2 are swivel casters or fixed casters.

[0006] Next, the method for climbing over the groove α will be explained using Figure 13. In the figure, reference numeral 3 denotes a push bar, and even if the left and right front wheels of caster 2 are stuck in groove α when pushing the transport cart as shown in Figure 13(b), the cart body can be supported in a stable state by a total of four wheels: the two casters 2 in the rear center vertical row and the two casters 2 on the left and right rear wheels, and the cart body will not tilt.

[0007] When the carriage further moves forward and reaches the position shown in Figure 8(c) and the front wheel of the two casters 2 in the central column fits into the groove α, the carriage body can be supported in a stable state by a total of five wheels: the four casters 2 at the front, rear, left and right, and the remaining rear caster 2 in the central column.

[0008] Finally, even if the two casters 2 on the left and right rear wheels get stuck in the groove α, the carriage body can be supported in a stable state by a total of four wheels, including the two casters 2 in the central vertical row in front of them and the two casters 2 on the left and right front wheels, and in either case the carriage body will not tilt and can safely move over the groove α one after another. DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0009] Of the six casters 2, those placed at the four corners of the trolley body have corner members 5 attached here for inserting the push bar 3, and so are attached at a point inside the trolley body from the hanging part by the amount of ``turning eccentric radius + caster radius'' so that they can rotate while avoiding the push bar 3 and corner members 5.

[0010] On the other hand, the brake-equipped caster has a foot-operated brake pedal 33 extending from the yoke 2c of the caster 2 that is connected to the mounting plate 9, as shown in Figure 14. However, this brake pedal 33 is located below the bogie body and is hidden by the bogie body, making it difficult to confirm its existence.

[0011] SUMMARY OF THE INVENTION An object of the present invention is to provide a transporting cart which overcomes the above-mentioned disadvantages of the conventional example and enables the presence of a brake to be quickly detected. [Means for solving the problem]

[0012] In order to achieve the above object, the present invention provides a transport cart having a generally rectangular cart body that is long in the front-rear direction and swivel casters attached to the backside of corner portions of the cart body, The bogie body has corner members that join the frames at the four corners of the bogie body, The corner member is provided with an insertion hole through which a push rod inserted from above is supported at a position lower than the lower end of the frame, The swivel caster includes a yoke, a wheel rotatably held by the yoke, and a brake pedal for fixing the rotation of the wheel; The brake pedal has an operating part that is pressed down with the foot when braking and pushed up with the foot when releasing the brake. Yes , When the brake is released and the wheels are facing forward and backward Looking at it from a two-dimensional perspective The operating unit is located rearward of the wheels, and The wheels overlap the carriage body without protruding from the carriage body, and the front end of the operating unit is positioned protruding from the rear end of the carriage body in a plan view. The gist of this is as follows.

[0013] According to the present invention, the corner parts having brake-equipped casters on the back side thereof are colored, and by visually checking the coloring, it is possible to immediately know which corner part has a brake-equipped caster under it.

[0014] Furthermore, when viewed from the side in a direction perpendicular to the direction of travel of the transport cart, the brake pedal can be seen below the coloring, so the presence of the brake can be quickly recognized by the coloring of the corner portion.

[0015] Furthermore, the outer periphery of the colored portion is positioned outside the side surface of the frame, making it more noticeable.

[0016] Furthermore, when the wheels are facing forward and backward, the operating unit is located behind the wheels, so that the brake pedal can be seen from above, allowing the driver to quickly recognize the presence of the brake. [Effects of the Invention]

[0017] As described above, the transporting cart of the present invention is capable of quickly detecting the presence of a brake. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. Fig. 1 is a side view of an embodiment of a transport cart of the present invention when the brake is released, Fig. 2 is a plan view of the same, Fig. 3 is a side view when the brake is applied, and Fig. 4 is a plan view of the same, in which casters 2, each having wheels 2a rotatably attached to a base 2b, are provided on the underside of a roughly rectangular cart body that is long in the front-to-rear direction and is composed of a frame 6 made of square pipes made of iron or aluminum alloy and a base 7, which is a loading plate made of iron or aluminum alloy joined to the top of the frame 6.

[0019] As shown in Figures 2 and 3, casters 2 each having a wheel 2a rotatably attached to a base 2b are provided on the underside of the cart body, which is composed of a frame 6 made of square pipes made of iron or aluminum alloy and a base 7, which is a loading plate made of iron or aluminum alloy joined to the top of the frame 6.

[0020] The frame 6 is formed into a lattice shape by butt welding square pipes in the vertical and horizontal directions, and on the underside of this lattice frame 6, mounting plates 9 for the casters 2 are attached with blind rivets 10 (see Figure 10) to sections 8 where the casters 2 are expected to be attached. The mounting plates 9 are attached to a total of six locations, excluding the six locations in the central sections 8 on the left and right.

[0021] The casters 2 are attached to at least four corners of the periphery of the rear surface of the cart body, and two or more casters 2 are provided in a vertical row in the same direction as the traveling direction when in use, inside a contour line connecting the swivel casters 2 attached to at least the four corners.

[0022] At the four corners of the carriage body, square pipes constituting the frame 6 are formed from extruded shapes such as aluminum and joined with corner members 5 that are L-shaped in plan view.

[0023] The cart body has a frame 6 and corner members 5 that join the frames 6 together at the four corners of the cart body. The corner members 5, the details of which are shown in Figures 8 and 9, have a cylindrical insertion hole 12 with an arc-shaped outer periphery formed in the corner of the L-shape, into which the push bar 3 is inserted, and opposing side wall members 13a and 13b that serve as mounting parts for the frame 6 protrude vertically from the insertion hole 12 in directions perpendicular to each other.

[0024] Of the side wall members 13a, 13b, the outer side wall member 13b is connected to the outer periphery of the insertion hole 12, and has the same height as the insertion hole 12 at the connection part with the insertion hole 12, and has approximately the same height as the frame 6 at the end, with the bottom side formed into an inclined portion 14.

[0025] The corner member 5 has an insertion hole 12 through which the push bar 3 inserted from above is supported at a position lower than the lower end of the frame 6, and a support plate 12a is provided at the bottom of the insertion hole 12 to prevent the push bar 3 from falling off.

[0026] To attach the corner member 5 to the frame 6 as described above, the frame 6 is inserted into the gap between the opposing side wall members 13a, 13b. In this case, since openings are formed between the side wall members 13a, 13b on both the top and bottom, the frame 6 can be inserted between these side wall members 13a, 13b, or conversely, the corner member 5 can be inserted into the vertical and horizontal frames 6 located in the corner portion. The insertion can also be done from either the top or bottom.

[0027] With the frame 6 inserted between the side wall members 13a and 13b, the corner member 5 is fixed to the frame 6 with rivets 15 or bolts. Because the corner member 5 is joined to the frame 6 using rivets 15 or the like, the frame 6 does not need to be made of the same material as the aluminum corner member 5.

[0028] In the transport cart to which the corner members 5 are attached in the manner described above, the corner members 5 having arc-shaped outer peripheries are attached to the corners that are likely to come into contact with other objects, so that shocks are absorbed, and when the corner members 5 are damaged and need to be replaced, they can be removed simply by removing the rivets 15, etc., and new corner members 5 can also be easily replaced by simply fastening them with the rivets 15.

[0029] In addition, the corner member 5 is formed with an insertion hole 12 for the push rod 3, and the insertion opening here is subjected to an excessive moment from the push rod 3. Considering that the corner member 5 has a portion that is easily deformed not only by contact with other objects but also from the inside, it is effective to make the corner member 5 easy to replace.

[0030] Incidentally, there are casters 2 with brakes and casters without brakes, and casters with brakes are provided at both or either the front and rear, or both or either of the left and right corners of the trolley body.

[0031] In the present invention, among the four corners of the cart body where the casters are provided, the corner where the braked caster is provided on the back side is colored (for example, red or green) to provide a colored portion 1.

[0032] For example, when the corner portion is made of an aluminum alloy material, this colored portion 1 is applied by baking or the like, and is applied to the entire surface of the outer side wall member 13b of the side wall members 13a, 13b of the corner member 5 that forms the corner portion.

[0033] In this way, an insertion hole 12 into which the push rod is inserted from above is provided in one of the corner portions, and a colored portion is provided extending from the portion where the insertion hole 12 is formed along the side of the frame in directions perpendicular to each other.

[0034] As shown in FIGS. 5 to 7, the braked caster includes a yoke (holding body) 2c, a wheel 2a, a brake shoe 16, and a brake pedal 17. As shown in FIGS.

[0035] The yoke (gripping body) 2c is made by bending a metal plate and is attached below the mounting plate 9, and the brake shoe 16 is made by bending a metal plate and is provided with a brake lining (not shown).

[0036] The brake pedal 17 is made by bending a metal plate, and by stepping on the operating part 18 at one end and swinging it, the brake shoe 16 is pressed against the wheel 2a, thereby fixing the wheel 2a.

[0037] The brake pedal 17 is made up of a U-shaped arm with an operating part 18 at one end as a closed end and a gap 19 formed in the center, the arm curved to form a gentle concave shape, and the operating part 18 is formed so that the end flips up.

[0038] The operating portion 18 is positioned so as to protrude from the rear end of the carriage body, and is located lower than the lower end of the corner member 5 when viewed from the side.

[0039] In this way, when the brake pedal 17 is viewed from the side with the wheels facing forward and backward when the brake is released, it is shaped so that it slopes downward from one end where it is supported to the other end, and then springs up toward the upper side.

[0040] When the brake is applied by stepping on the foot, the wheel 2a is positioned so that the wheel is located in the gap at the center of the U-shaped arm and enters the gap 19 of the brake pedal 17.

[0041] The flip-up operating section 18 is provided with a foot pedal 20 that projects forward. The foot pedal 20 is a generally plate-shaped member that projects in a direction away from the carriage body.

[0042] 1 and 2, when the wheels 2a are oriented in the front-rear direction upon braking release, the brake pedal 17 is in a position such that the The front end 1 and 2, in this case, when the wheels 2a are facing forward and backward in a plan view, the wheels 2a do not protrude from the rear end of the bogie body but overlap with the bogie body.

[0043] When the traveling direction of the transport cart is the longitudinal direction of the transport cart, the brake pedal 17 can be seen below the colored portion when viewed along the traveling direction of the transport cart.

[0044] As shown in Figure 2, the brake-equipped swivel caster is attached to the cart body via a mounting plate 9, and when the transport cart is viewed in a plan view, part of the brake pedal 17 can be seen through the gap between the frame 6 and the mounting plate 9.

[0045] To operate the brakes, the brake pedal 17 is pressed down with the foot, and the brake shoe 16 is pressed against the wheel 2a, fixing the wheel 2a. To release the brakes, the brake pedal 17 is pressed up with the foot, and the brake shoe 16 is released from engagement with the wheel 2a.

[0046] When the brakes are released and the wheels are facing forward and backward, the operating portion of the brake pedal 17 is located rearward of the wheels as shown in FIG. 5 and is located lower than the lower ends of the corner members which are located lower than the frame. When viewed from above, the wheels do not protrude from the bogie body but overlap with the bogie body.

[0047] When the brake-equipped caster is attached to at least one of the four corners of the periphery of the rear surface of the trolley body, corner members 5 for inserting the push bar 3 are attached to the four corners, so the caster is attached at a point inside the trolley body from the hanging part by the amount of "turning eccentric radius + caster radius" so that it can rotate while avoiding the push bar 3 and corner members 5.

[0048] As a result, depending on the direction of the wheels 2a or the braking state, the brake pedal 17 is hidden by the back surface of the bogie body and the position of the brake pedal 17 cannot be seen. That is, depending on the direction of the wheels or the braking state, the brake pedal 17 is hidden by the back surface of the bogie body and the position of the brake pedal cannot be seen, and when viewed in a plan view in a state where the wheels are facing forward and backward while being braked by stepping on the foot, the operating unit is positioned so as to overlap with the bogie body and not be exposed from the periphery.

[0049] Therefore, the colored portion 1 allows one to grasp the corner portion where the braked caster is provided on the back side among the four corner portions of the cart body where the caster is provided, thereby making it possible to recognize the presence of the braked caster, and when the wheel 2a faces forward and backward when the brake is released, the brake pedal 17 appears from around the cart body, allowing the brake to be applied reliably.

[0050] In addition to the swivel casters 2 attached to at least the four corners of the periphery of the underside of the cart body, the transport cart has two or more casters arranged in a vertical row in the same direction as the direction of travel when in use, inside the outline connecting the swivel casters 2 attached to at least the four corners. However, this is not limited to this, and various types of carts can be used, such as a transport cart as disclosed in JP 2009-227042 A, in which three swivel casters 2 are attached in a vertical row on each side of the longitudinal direction of a flat rectangular cart body, with the middle caster of the three casters positioned outside the two swivel casters at the front and rear, or a cart with casters only on at least the four corners of the periphery of the underside of the cart body. [Brief explanation of the drawings]

[0051] [Figure 1] 1 is a side view showing an embodiment of a transport cart of the present invention when the brake is released. [Figure 2] 1 is a plan view showing an embodiment of a transport cart of the present invention when the brake is released. [Figure 3] 1 is a side view showing an embodiment of a transport cart of the present invention when braking. [Figure 4] 1 is a plan view showing an embodiment of a transport cart of the present invention when braking. [Figure 5] FIG. 1 is a side view of a brake-equipped caster used in the present invention. [Figure 6] FIG. 1 is a front view of a brake-equipped caster used in the present invention. [Figure 7] FIG. 2 is a bottom view of the brake-equipped caster used in the present invention. [Figure 8] FIG. [Figure 9] FIG. [Figure 10] FIG. [Figure 11] FIG. [Figure 12] FIG. [Figure 13] FIG. 10 is an explanatory diagram showing the transport cart in use. [Figure 14] FIG. 1 is a side view of a conventional brake-equipped caster. [Explanation of symbols]

[0052] 1 Coloring part 2 Caster 2a Wheel 2b Base 2c yoke 3 push stick 5 Corner member 6 Frame 7 bases, 8 compartments 9 Mounting plate 10 Blind rivet 11 Bolt and nut 12 Insertion hole 12a Support plate 13a, 13b Side wall members 14 Inclined portion 15 Rivet 16 Brake shoe 17 Brake pedal 18 Operation part 19 Gap 20 Foot pedal 33 Brake pedal

Claims

[Claim 1] A transport cart having a generally rectangular cart body that is long in the front-rear direction and swivel casters attached to the back side of the corners of the cart body, The bogie body has corner members that join the frames to each other at four corners of the bogie body, The corner member is provided with an insertion hole through which a push rod inserted from above is supported at a position lower than the lower end of the frame, The swivel caster includes a yoke, a wheel rotatably held by the yoke, and a brake pedal for fixing the rotation of the wheel; The brake pedal has an operating portion that is depressed by the foot when braking and pushed up by the foot when releasing the brake, This transport trolley is characterized in that when the brakes are released and the wheels are facing forward and backward, the operating unit is located behind the wheels in a plan view, the wheels do not protrude from the trolley body but overlap with the trolley body, and the front end of the operating unit is located protruding from the rear end of the trolley body in a plan view.

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