Transport cart

Abstract

To provide a transport truck having a rectangular truck body and swivel casters attached to the rear side of the corners of the truck body, and capable of quickly detecting the presence of a brake. [Solution] The corner member 5 of the trolley body has an insertion hole that supports the hand push rod at a position lower than the lower end of the frame, and the swivel caster 2 has a brake pedal 17 and an operating part 18 that is pressed down with the foot when braking and pushed up with the foot when releasing the brake, and when viewed in a plan view with the wheels 2a facing forward and backward, the operating part 18 is located closer to the center of the trolley body in the left-right direction than the insertion hole, and when the brake is released and the wheels 2a are facing forward and backward, the operating part 18 is located rearward of the wheels 2a and lower than the lower end of the corner member 5 that is positioned lower than the frame, and when viewed in a plan view, the wheels do not protrude from the trolley body but overlap with it.

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 luggage, which is designed to be stable and movable even on uneven ground, as shown in the following patent document. [Patent Document 1] JP 2009-220653 A

[0003] As shown in Figures 10 to 12, this is a trolley body composed of a frame 6 made of square pipes made of iron or aluminum alloy and a base 7, which is a mounting plate made of iron or aluminum alloy joined to the upper part of the frame 6, and casters 2 with wheels 2a attached freely rotatably to bases 2b are provided on the underside of the trolley body.

[0004] The frame 6 is formed into a lattice shape by butt welding square pipes vertically and horizontally, 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 manner, in a transport cart having casters 2 attached to at least four corners of the periphery of the underside 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 traveling direction during use, inside the outline connecting the swivel casters 2 attached to at least the four corners. The casters 2 are swivel casters or fixed casters.

[0006] Next, the method of climbing over the groove α will be explained with reference to Fig. 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 Fig. 13(b), the cart body can be supported in a stable state by a total of four wheels, namely, the two casters 2 in the central vertical row at the rear and the two casters 2 at the rear left and right, and the cart body will not tilt.

[0007] When the trolley further moves forward and reaches the position shown in Figure 8(c) and the front wheel of the two casters 2 in the central vertical row fits into groove α, the trolley 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 vertical row.

[0008] Finally, even if the two casters 2 on the left and right rear wheels get stuck in the groove α, the trolley 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 trolley body will not tilt and can safely climb over the grooves α one after another. DISCLOSURE OF THEINVENTION [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, a caster with a brake has a foot-operated brake pedal 33 extending from a yoke 2c of a caster 2 that is connected to a mounting plate 9 as shown in FIG.

[0011] The object of the present invention is to configure the wheels so that, when viewed in a plan view, they do not appear from the bogie body and overlap with the bogie body; The operating unit is located protruding from the rear end of the carriage body, so that the presence of the brake can be quickly recognized. To provide a transport cart. [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 rear side of the corners of the cart body, The cart body has corner members that join the frames at the four corners of the cart body, The corner member is provided with an insertion hole through which a hand 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, a brake pedal for fixing the rotation of the wheels; The brake pedal has an operation part that is pressed down by the foot when braking and pushed up by the foot when releasing the brake, and is located closer to the center in the left-right direction of the carriage body than the insertion hole when viewed in a plan view with the wheels facing in the front-rear direction, When the brake is released and the wheel faces the front-rear direction, the operating unit is located rearward of the wheel, and the highest portion of the operating unit is located lower than the lower end of the corner member that is located lower than the frame, and the wheel overlaps with the cart body when viewed in a plan view. The operating unit is located protruding from the rear end of the cart body. The gist of this document is as follows.

[0013] Secondly, when the operating part is depressed with the foot to brake and the wheels are facing in the forward / rearward direction, the operating part is inclined so as to gradually become lower as it moves toward the rear.

[0014] Thirdly, the corner member has a colored portion on its outer periphery that is a color different from that of the frame, and when viewed in a plan view with the brake released and the wheel facing forward or backward, the operating portion and the colored portion are located forward or backward.

[0015] Fourthly, a part of the operating portion and a part of the colored portion are positioned in front and behind each other.

[0016] Fifthly, the corner member has a colored portion on its outer periphery that is a color different from that of the frame, and when viewed from the side with the wheel facing forward and backward, the brake pedal and the colored portion are located above and below.

[0017] Sixthly, the brake pedal is pivotable, and when viewed in a plan view with the wheels facing forward and backward when the brake is applied by depressing the foot, the rear end of the operating part is positioned closer to the rear end of the trolley body than when the brake is released.

[0018] According to the present invention, the corner parts having brake-equipped casters on the back side thereof are colored, so that by visually checking the coloring, it is possible to instantly know which corner part has a caster with a brake under it.

[0019] In addition, when viewed from the side in a direction perpendicular to the traveling direction of the transport cart, the brake pedal can be seen below the coloring, so that the presence of the brake can be quickly grasped in accordance with the coloring of the corner portion.

[0020] Furthermore, since the outer periphery of the colored portion is positioned outside the side surface of the frame, it can be made to stand out.

[0021] In addition, when the wheels are facing forward and backward, the operating unit is positioned rearward of the wheels, so that the brake pedal can be seen from above, allowing the presence of the brake to be quickly ascertained. Effect of the Invention

[0022] As described above, in the transport cart of the present invention, the brake pedal has an operating part which is pressed down with the foot when braking and pushed up with the foot when the brakes are released, and when viewed in a plan view with the wheels facing in the fore-and-aft direction, is located closer to the center in the left-right direction of the cart body than the insertion hole, and when the brakes are released and the wheels are facing in the fore-and-aft direction, the operating part is located behind the wheels and the highest part of the operating part is located even lower than the lower end of the corner member which is located lower than the frame, and the wheels are arranged so that they do not protrude from the cart body but overlap with it when viewed in a plan view, and The operating unit is positioned protruding from the rear end of the carriage body, so that the presence of the brakes can be quickly grasped. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] Hereinafter, the embodiments 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 with wheels 2a rotatably attached to bases 2b are provided on the underside of a roughly rectangular cart body that is long in the front-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 and joined to the upper part of the frame 6.

[0024] As shown in Figures 2 and 3, casters 2 having wheels 2a rotatably attached to bases 2b are provided on the underside of a cart body composed of a frame 6 made of square pipes made of iron or aluminum alloy and a base 7, which is a mounting plate made of iron or aluminum alloy joined to the upper part of the frame 6.

[0025] The frame 6 is formed into a lattice shape by butt welding square pipes vertically and horizontally, 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.

[0026] In addition to the casters 2 attached to at least the four corners of the periphery of the rear surface of the cart body, 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.

[0027] At the four corners of the cart body, the vertical and horizontal square pipes that make up the frame 6 are formed from extruded aluminum or the like and joined with corner members 5 that have an overall L-shaped planar shape.

[0028] 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 member 5, the details of which are shown in Figures 8 and 9, has a cylindrical insertion hole 12 with an arc-shaped outer periphery formed at the corner of the L-shape, into which the push bar 3 is inserted, and opposing side wall members 13a and 13b are vertically protruded from the insertion hole 12 in mutually orthogonal directions as mounting parts for the frame 6.

[0029] Of the side wall members 13a, 13b, the side wall member 13b located on the outside is connected to the outer periphery of the insertion hole 12, has the same height as the insertion hole 12 at the connection portion with the insertion hole 12, and has approximately the same height as the frame 6 at the end, and has a bottom edge formed into an inclined portion 14.

[0030] The corner member 5 is provided with an insertion hole 12 in 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.

[0031] 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 the space between the side wall members 13a, 13b is open on both the top and bottom, the frame 6 may be inserted between these side wall members 13a, 13b, or conversely, the corner member 5 may be inserted into the vertical and horizontal frames 6 located at the corner portion. The insertion can also be done from either the top or bottom.

[0032] With the frame 6 inserted between the side wall members 13a, 13b, the corner member 5 is fixed to the frame 6 with rivets 15 or bolts. Since 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.

[0033] A transport cart with corner members 5 attached in the above manner has corner members 5 with arc-shaped outer periphery attached to corners that are likely to come into contact with other objects, so shocks are absorbed. When corner member 5 becomes damaged and needs to be replaced, it can be removed simply by removing rivets 15, and new corner member 5 can also be easily replaced by simply fastening it with rivets 15.

[0034] Also, the corner member 5 is formed with an insertion hole 12 for the push bar 3, and an excessive moment is applied to the insertion opening of this hole from the push bar 3. Considering that the corner member 5 has a portion that is easily deformed not only from contact with other objects but also from the inside, it is effective to make the corner member 5 easy to replace.

[0035] By the way, there are casters 2 with and without brakes. Casters with brakes are provided on both or either the front and rear, and on both or either the left and right, of the four corners of the trolley body.

[0036] In the present invention, among the four corners of the cart body on which the casters are provided, the corners on which the brake-equipped casters are provided on the back side are colored (for example, red or green) to provide colored portion 1.

[0037] For example, when the corner portion is made of an aluminum alloy material, the colored portion 1 is applied by baking or the like to the entire surface of the outermost side wall member 13b of the side wall members 13a, 13b of the corner member 5 that forms the corner portion.

[0038] In this way, an insertion hole 12 into which a push bar 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 surfaces of the frame in directions perpendicular to each other.

[0039] The braked caster includes a yoke (gripping body) 2c, a wheel 2a, a brake shoe 16, and a brake pedal 17, as shown in FIGS.

[0040] 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).

[0041] The brake pedal 17 is made by bending a metal plate, and when an operating portion 18 at one end is stepped on and swung, the brake shoe 16 is pressed against the wheel 2a to fix the wheel 2a.

[0042] The brake pedal 17 is made up of a U-shaped arm with an operating part 18 at one end being a closed end and a gap 19 formed in the center, the arm being curved to form a gentle concave shape, and the operating part 18 is formed so that the end is flipped up.

[0043] The operating unit 18 is positioned to protrude from the rear end of the cart body, and is located lower than the lower end of the corner member 5 when viewed from the side.

[0044] In this way, when the brake pedal 17 is viewed from the side with the wheels facing forward and backward when the brakes are released, it is shaped so that it inclines downward as it moves from one end where it is supported to the other end, and then springs up toward the upper side.

[0045] When the brake is applied by stepping on the brake pedal with 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.

[0046] The flip-up operating section 18 is provided with a foot pedal 20 that protrudes forward. The foot pedal 20 is a generally plate-shaped member that protrudes in a direction away from the cart body.

[0047] 1 and 2, the brake pedal 17 is configured such that when the wheels 2a face forward and backward when the brake is released, the operating unit 18 appears from the rear end of the bogie body in a plan view. In this case, as shown in Figs. 1 and 2, when the wheels 2a face forward and backward in a plan view, the wheels 2a do not appear from the rear end of the bogie body but overlap with the bogie body.

[0048] When the traveling direction of the transport cart is the longitudinal direction of the transport cart, the brake pedal 17 is visible below the colored portion when viewed along the traveling direction of the transport cart.

[0049] As shown in FIG. 2, the braked swivel caster is attached to the trolley body via a mounting plate 9, and when the transport trolley is viewed in a plan view, a portion of the brake pedal 17 can be seen through the gap between the frame 6 and the mounting plate 9.

[0050] To operate the brakes, the brake pedal 17 is depressed with the foot, and the brake shoe 16 is pressed against the wheel 2a to fix the wheel 2a. To release the brakes, the brake pedal 17 is pushed up with the foot, and the brake shoe 16 is released from engagement with the wheel 2a.

[0051] 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 the highest part of the operating portion is located lower than the lower end of the corner member which is located lower than the frame, and the wheels overlap the bogie body when viewed in a plan view, without protruding from the bogie body.

[0052] When the brake-equipped caster is attached to at least one of the four corners of the peripheral part of the underside of the trolley body, corner members 5 for inserting the push bar 3 are attached to the four corners, so that the caster is attached at a point inside the trolley body from the hanging part by an amount equal to the "turning eccentric radius + caster radius" so that it can rotate while avoiding the push bar 3 and corner members 5.

[0053] 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 known. 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 known, and when viewed in a plan view in a state where the wheels are facing forward and backward during braking by depressing the foot, the operation unit is positioned so as to overlap with the bogie body and not be exposed from the periphery.

[0054] Therefore, the colored portion 1 allows one to grasp which of the four corners of the trolley body on which the casters are provided has a braked caster on the back side, thereby enabling the presence of the braked caster to be recognized, and when the wheel 2a faces forward and backward when the brake is released, the brake pedal 17 appears from around the trolley body, allowing the brakes to be applied reliably.

[0055] In addition to the swivel casters 2 attached to at least the four corners of the peripheral part 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, the present invention is not limited to this and can be applied to various types of carts, such as a transport cart having three swivel casters 2 attached in a vertical row on each of the left and right sides of the longitudinal direction of a flat rectangular cart body as described in JP 2009-227042 A, in which the middle caster of the three casters is 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 peripheral part of the underside of the cart body. [Brief description of the drawings]

[0056] [Figure 1] 1 is a side view showing an embodiment of a transport cart according to the present invention when the brake is released. FIG. [Diagram 2] 1 is a plan view showing an embodiment of a transport cart according to the present invention when the brake is released. FIG. [Diagram 3] FIG. 1 is a side view showing an embodiment of a transport cart of the present invention when braking. [Figure 4] FIG. 1 is a plan view showing an embodiment of a transport cart of the present invention when braking. [Diagram 5] FIG. 2 is a side view of a brake-equipped caster used in the present invention. [Figure 6] FIG. 2 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. 13 is an explanatory diagram showing a state in which the transport cart is used. [Figure 14] FIG. 1 is a side view of a conventional caster with brakes. [Explanation of symbols]

[0057] 1 Coloring part 2 Caster 2a Wheel 2b Base 2c yoke 3 push stick 5 Corner parts 6 Frame 7 base 8 compartments 9 Mounting plate 10 Blind rivet 11 Bolt and nut 12 Insertion hole 12a Support plate 13a, 13b Side wall member 14 Inclined portion 15 Rivet 16 Brake shoe 17 Brake pedal 18 Operation part 19 Gap 20 Foot pedal 33 Brake pedal

Claims

1. A transport cart having a generally rectangular cart body that is long in the front-rear direction and a swivel caster attached to the back side of a corner portion of the cart body, The cart body has corner members that join the frames at four corners of the cart body, The corner member is provided with an insertion hole through which a hand 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, a brake pedal for fixing the rotation of the wheels; The brake pedal has an operation part that is pressed down by the foot when braking and pushed up by the foot when releasing the brake, and is located closer to the center in the left-right direction of the carriage body than the insertion hole when viewed in a plan view with the wheels facing in the front-rear direction, This transport trolley is characterized in that, when viewed in a plan view with the wheels facing forward and backward when the brakes are released, the operating unit is located rearward of the wheels and the highest part of the operating unit is located lower than the lower end of the corner member which is located lower than the frame, the wheels overlap the trolley body but do not protrude from the trolley body when viewed in a plan view, and the operating unit is located protruding from the rear end of the trolley body.

2. 2. The transport cart according to claim 1, wherein when the operating part is depressed by a foot to brake and the wheels are facing in the forward / rearward direction, the operating part is inclined so as to gradually become lower as it approaches the rear side.

3. The transport cart described in claim 1 or claim 2, wherein the corner member has a colored portion on its outer periphery that is a different color from the frame, and when viewed in a plan view when the brake is released and the wheels are facing in the fore-and-aft direction, the operating portion and the colored portion are located at the front and rear.

4. The transport cart according to claim 3 , wherein a part of the operating portion and a part of the colored portion are positioned in front and behind each other.

5. A transport cart as described in any one of claims 1 to 4, wherein the corner member has a colored portion on its outer periphery that is a color different from that of the frame, and when viewed from the side with the wheels facing in the fore-and-aft direction, the brake pedal and the colored portion are located above and below each other.

6. A transport cart as described in any one of claims 1 to 5, wherein the brake pedal is pivotable, and when viewed in a plan view when the brake is applied by pressing with the foot and the wheels are facing in the fore-and-aft direction, the rear end of the operating part is positioned closer to the rear end of the cart body than when the brake is released.

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