Carrying cart

Abstract

The present invention relates to a transport cart of a new structure that allows for easy direction adjustment while loaded with heavy objects. The transport trolley according to the present invention comprises a storage box (A) having a cylindrical shape with an open top surface, a pair of fixed wheels (30) provided on both sides of the central part of the storage box (A), and front and rear casters (41, 42) provided on the front and rear of the storage box (A). When the trolley is rotated, a moment is applied to the fixed wheels (30), allowing the trolley to be rotated with less force compared to conventional transport trolleys, thereby having the advantage of preventing injury to the worker.

Description

Technology Field

[0001] The present invention relates to a transport cart, and more specifically, to a transport cart of a new structure that allows the direction to be easily adjusted while a heavy object is loaded, and also allows the heavy object to be easily discharged. Background Technology

[0002] Generally, when manufacturing parts using machine tools, large quantities of chips generated or manufactured parts are transported while loaded on a transport cart.

[0003] FIGS. 1 and 2 illustrate an example of a transport cart used for loading such chips or parts, comprising a storage box (1) configured in a tubular shape with an open top surface, a pair of fixed wheels (2) provided on both front sides of the lower side of the storage box (1), and a pair of casters (3) provided on both rear sides of the lower side of the storage box (1).

[0004] The above storage box (1) is made of a high-strength metal material and is provided with a handle (4) on the rear side so that a worker can hold the handle (4) and push the storage box (1) or adjust the direction of the storage box (1).

[0005] The above fixed wheel (2) is coupled to the lower side of the storage box (1) so that its periphery faces in the front-rear direction.

[0006] The above caster (3) is connected to the lower side of the storage box (1) so as to be freely directionally adjustable.

[0007] Therefore, when a worker holds the handle (4) and pushes the storage box (1) to rotate it sideways, the caster (3) rotates, and the direction of the storage box (1) is adjusted.

[0008] Meanwhile, when the transport cart is filled with chips or parts, the weight of the transport cart becomes very heavy, so a large load is placed on the caster (3), and the caster (3) cannot change direction smoothly.

[0009] In addition, when the caster (3) cannot be smoothly turned in this manner, if the worker pushes the transport cart sideways to adjust the direction, not only is a very large force required, but a large burden is placed on the worker's body, and the worker is frequently injured.

[0010] As mentioned above, this problem occurred equally in all types of trolleys transporting heavy goods, not just those transporting chips and parts.

[0011] Therefore, a new method to solve these problems became necessary. Prior art literature

[0012] Registered Patent No. 10-2316716, The problem to be solved

[0013] The present invention aims to solve the above problems by providing a transport cart with a new structure that allows the direction to be easily adjusted while the heavy object is loaded, and also allows the heavy object to be easily discharged. means of solving the problem

[0014] The present invention, for achieving the above-mentioned purpose, provides a transport trolley characterized by comprising a storage box (A) having a cylindrical shape with an open top surface, a pair of fixed wheels (2) provided on both sides of the central part of the storage box (A), and front and rear casters (41, 42) provided on the front and rear of the storage box (A).

[0015] According to another feature of the present invention, a transport trolley is provided, characterized in that the lower circumferential surface of the front and rear casters (41, 42) is positioned higher than the lower circumferential surface of the fixed wheel (30), so that when the storage box (A) is in a horizontal state, the front and rear casters (41, 42) are spaced upward from the bottom surface.

[0016] According to another feature of the present invention, a transport cart is provided, characterized in that a coupling hole (11a) is formed in the upper perimeter of the storage box (A), and the transport cart can be lifted upward using a device inserted into the coupling hole (11a).

[0017] According to another feature of the present invention, the storage box (A) comprises a main body (11) with an open top and bottom surface, an opening / closing plate (12) which is rotatably coupled to one side of the bottom of the main body (11) in an up-and-down direction and rotates in an up-and-down direction to open and close the lower side of the main body (11), and a fixing means (20) which is provided on the main body (11) and coupled to the front end of the opening / closing plate (12) to fix the opening / closing plate (12) so as to block the lower side of the main body (11). The fixing means (20) comprises a pivot bracket (21) provided on the lower side of the perimeter surface of the main body (11), a horizontal part (22a) extended laterally, a vertical part (22b) extended upward from one end of the horizontal part (22a), and a support piece (22c) provided to extend toward the opening / closing plate (12) from the lower perimeter surface of the horizontal part (22a). A transport cart is provided, characterized by comprising a fixed lever (22) in which a horizontal portion (22a) is rotatably coupled to the pivot bracket (21), and a fixed member (23) which is movably coupled to a lifting guide provided on the circumferential surface of the main body (11) and has a coupling member on one side that is coupled to the upper end of the vertical portion (22b) of the fixed lever (22).

[0018] According to another feature of the present invention, a transport cart is provided, further comprising a slider (44) slidably coupled to the lower side of the storage box (A) in the front-rear direction, and a position adjustment means (45) connected to the slider (44) to adjust the front-rear position of the slider (44), wherein the fixed wheel (30) is provided on the lower side of the slider (44) so ​​as to be spaced laterally from each other, so that when a heavy object is loaded in the storage box (A), the position of the slider (44) can be adjusted in the front-rear direction using the position adjustment means (45) so that the fixed wheel (30) is positioned below the center of gravity of the object loaded in the storage box (A). Effects of the invention

[0019] The transport trolley according to the present invention comprises a storage box having a cylindrical shape with an open top surface, a pair of fixed wheels provided on both sides of the central part of the storage box, and front and rear casters provided on the front and rear of the storage box. When the trolley is rotated, a moment is applied to the fixed wheels, allowing the trolley to be rotated with less force compared to conventional transport trolleys. Accordingly, the worker can easily and safely perform tasks such as moving and operating the transport trolley, thereby preventing safety accidents in the workplace and improving working conditions.

[0020] In addition, when the fixing stand is raised, the fixing lever is released. Since the fixing lever rotates downward and backward due to the load of the opening / closing plate, releasing the fixing of the opening / closing plate and allowing it to rotate downward, thereby opening the lower side of the main body, this invention has various effects, such as preventing safety accidents for workers and improving the working environment, by enabling the easy discharge of heavy objects. Brief explanation of the drawing

[0021] FIG. 1 is a side view illustrating a conventional transport cart, FIG. 2 is a lower side view of a conventional transport trolley, FIG. 3 is a side view illustrating a transport cart according to the present invention. FIG. 4 is a front view illustrating a transport cart according to the present invention, FIG. 5 is a lower side view of a transport trolley according to the present invention, FIGS. 6 to 9 are reference drawings illustrating the operation of a transport cart according to the present invention. FIG. 10 is a lower side view illustrating a second embodiment of a transport cart according to the present invention, FIG. 11 is a side cross-sectional view of a second embodiment of a transport trolley according to the present invention. Specific details for implementing the invention

[0022] The present invention will be described in detail below with reference to the attached exemplary drawings.

[0023] FIGS. 3 to 9 illustrate a transport cart according to the present invention, comprising a storage box (A) having a cylindrical shape with an open top surface, a pair of fixed wheels (30) provided on both sides of the central part of the storage box (A), and front and rear casters (41, 42) provided on the front and rear of the storage box (A).

[0024] The storage box (A) comprises a main body (11) with open upper and lower surfaces, an opening / closing plate (12) which is rotatably coupled to one side of the lower end of the main body (11) in an upward and downward direction to open and close the lower side of the main body (11), and a fixing means (20) which is provided on the main body (11) and coupled to the front end of the opening / closing plate (12) to fix the opening / closing plate (12) so as to block the lower side of the main body (11).

[0025] The above main body (11) is configured in a rectangular tube shape that is long in the front-to-back direction and narrow in the side direction, and has open top and bottom surfaces.

[0026] In addition, a coupling hole (11a) penetrating both sides is formed on the upper side of both sides of the main body (11), and as shown in FIGS. 7 to 9, a device inserted into the coupling hole (11a) is configured to lift the transport cart upward.

[0027] The above device utilizes the fork (6) of a forklift, and with the fork (6) inserted into the coupling groove, the fork (6) is raised to lift the entire transport cart upward, and the forklift is moved to move the transport cart.

[0028] The above opening / closing plate (12) is made of a high-strength rectangular metal plate, and its rear end is connected to the rear side of the main body (11) by a hinge (12a) so as to be rotatable in the up-and-down direction.

[0029] Accordingly, when the opening / closing plate (12) is rotated upward, the lower side of the main body (11) is sealed so that various objects can be placed inside the storage box (A), and as shown in FIG. 9, when the opening / closing plate (12) is rotated downward, the lower side of the main body (11) is opened so that objects stored in the storage box (A) are discharged downward.

[0030] The above fixing means (20) is composed of a pivot bracket (21) provided on the lower front side of the main body (11), a fixing lever (22) coupled to the pivot bracket (21), and a fixing member (23) coupled to the front of the main body (11) so as to be vertically movable to fix the fixing lever (22).

[0031] The above-mentioned pivot bracket (21) utilizes a circular sleeve provided to extend laterally from the lower front side of the main body (11).

[0032] As shown in FIGS. 3 to 5, the fixed lever (22) is composed of a horizontal portion (22a) extended laterally, a vertical portion (22b) extended upward from the right end of the horizontal portion (22a), and a plurality of support pieces (22c) extended toward the opening / closing plate (12) from the lower circumference of the horizontal portion (22a), and the horizontal portion (22a) is coupled to the pivot bracket (21) so as to be rotatable in the up and down direction.

[0033] At this time, the fixed lever (22) is coupled such that the vertical part (22b) is positioned on the side of the main body (11) so that when the fixed lever (22) rotates from the vertical direction to the rear, the vertical part (22b) does not interfere with the main body (11).

[0034] The above support piece (22c) is configured such that a plurality of them are attached to the lower circumference of the horizontal portion (22a), and the vertical portion (22b) of the fixing lever (22) is extended backward while in a vertically upright position to support the lower front portion of the opening / closing plate (12) that blocks the lower side of the main body (11).

[0035] The above fixing member (23) is configured in the shape of a rod extending in the vertical direction and is vertically movably coupled to a guide tube (23a) provided to extend in the vertical direction at the right end of the main body (11). The upper end is provided with a coupling tube (23b) that is coupled to the outside of the vertical part (22b) of the fixing lever (22), and the lower end is provided with a protruding rod (23c).

[0036] Accordingly, as shown in FIG. 3, when the opening / closing plate (12) is in a state where it is closing the lower side of the main body (11), if the fixing lever (22) is rotated upward, the support piece (22c) of the fixing lever (22) supports the lower side of the opening / closing plate (12) so that the opening / closing plate (12) is fixed so that it does not rotate downward, and when the fixing bracket (23) is lowered, the connecting pipe (23b) is connected to the upper end of the vertical part (22b) of the fixing lever (22) so that the fixing lever (22) is fixed so that it does not rotate downward, thereby fixing the opening / closing plate (12) so that it does not rotate downward.

[0037] And, as shown in FIG. 7, when the fixing bracket (23) is raised, the fixing lever (22) is released, and as shown in FIG. 8, the fixing lever (22) is rotated to the rear lower side by the load of the opening / closing plate (12) and the fixing of the opening / closing plate (12) is released.

[0038] Accordingly, as shown in FIG. 9, the opening / closing plate (12) is rotated downward so that the lower side of the main body (11) is opened.

[0039] The above fixed wheel (30) is rotatably coupled to brackets (31) provided on both sides of the central part of the lower side of the opening / closing plate (12) to have a lateral rotational center axis.

[0040] The above front and rear casters (41, 42) are directionally adjustablely connected to the middle section of the front and rear ends of the lower side of the opening / closing plate (12).

[0041] At this time, the lower circumferential surface of the front and rear casters (41, 42) is located on the upper side compared to the lower circumferential surface of the fixed wheel (30).

[0042] That is, as shown in FIG. 3, the distance (H2, H3) from the opening / closing plate (12) to the lower circumferential surface of the front / rear casters (41, 42) is configured to be shorter than the distance (H1) from the opening / closing plate (12) to the lower circumferential surface of the fixed wheel (30).

[0043] Accordingly, when the storage box (A) is in a horizontal state, the lower circumferential surface of the fixed wheel (30) is in close contact with the floor surface, and the lower circumferential surface of the front and rear casters (41, 42) is spaced upward from the floor surface.

[0044] And, as shown in FIG. 6, when the storage box (A) tilts forward or backward, the front caster (41) or the rear caster (42) comes into close contact with the floor surface, preventing the storage box (A) from tilting excessively.

[0045] Drawing number 43, which is not described, illustrates a handle provided on the rear side of the main body (11).

[0046] The method of using the transport cart configured in this manner is explained as follows.

[0047] First, normally, the opening / closing plate (12) is rotated upward to seal the lower side of the main body (11) and maintains a fixed state by the fixing means (20).

[0048] Accordingly, a transport cart is positioned so that the fixed wheel (30) and the front caster (41) or rear caster (42) are in close contact with the floor surface, and items such as chips generated by metal processing or processed parts can be stored in the storage box (A).

[0049] Then, when the worker holds the handle (43) and the main body (11) is leveled as shown in FIG. 3, the fixed wheel (30) is in contact with the ground and the front and rear casters (41, 42) are spaced apart from the floor surface, and at this time, the worker can push the handle (43) to move the main body (11) or change the direction of the main body (11).

[0050] And, as shown in FIG. 7, after inserting the fork (6) of the forklift into the coupling hole (11a), the transport cart can be lifted upward by raising the fork (6).

[0051] Then, using a forklift, the transport cart is moved to the top of the container (7) that stores goods, and as shown in FIGS. 7 and 8, when the worker raises the fixed stand (23), the fixing lever (22) is released, and accordingly, as shown in FIG. 9, the fixing lever (22) and the opening / closing plate (12) rotate, and the lower side of the main body (11) is opened.

[0052] Accordingly, the items stored in the storage box (A) are discharged into the container (7).

[0053] The transport trolley configured in this manner comprises a storage box (A) having a cylindrical shape with an open top surface, a pair of fixed wheels (30) provided on both sides of the central part of the storage box (A), and front and rear casters (41, 42) provided on the front and rear of the storage box (A). When the trolley is rotated, a moment is applied to the fixed wheels (30), allowing the trolley to be rotated with less force compared to conventional transport trolleys, thereby providing the advantage of preventing workers from being injured.

[0054] In other words, in conventional transport carts, the load is applied to the fixed wheel (30) located at the front and the caster located at the rear, so the distance between the points of application of the load becomes long, and accordingly, a large force is required when a worker rotates the cart.

[0055] In contrast, the present invention concentrates the load on a pair of fixed wheels (30) arranged to be spaced apart laterally from each other, so that the distance of the point of application where the load is applied becomes shorter than that of a conventional transport cart, and accordingly, the cart can be easily rotated with less force.

[0056] In particular, the lower circumferential surface of the front and rear casters (41, 42) is positioned higher than the lower circumferential surface of the fixed wheel (30), so that when the storage box (A) is in a horizontal state, the front and rear casters (41, 42) are spaced upward from the bottom surface, thereby preventing resistance caused by the front and rear casters (41, 42), and thus making it easier to rotate the transport cart.

[0057] In addition, a coupling hole (11a) is formed in the upper perimeter of the storage box (A), and since a device inserted into the coupling hole (11a) can be used to lift the transport cart upward, there is an advantage that it becomes easier to lift or move the transport cart.

[0058] Additionally, the storage box (A) comprises a main body (11) with open upper and lower surfaces, an opening / closing plate (12) which is rotatably coupled to one side of the lower end of the main body (11) in an up-and-down direction and rotates in an up-and-down direction to open and close the lower side of the main body (11), and a fixing means (20) which is provided on the main body (11) and coupled to the front end of the opening / closing plate (12) to fix the opening / closing plate (12) so as to block the lower side of the main body (11). After moving the transport trolley to the top of the container (7), if the fixing means (20) is operated to release the fixing of the opening / closing plate (12), the opening / closing plate (12) rotates downward to open the lower side of the main body (11).

[0059] Therefore, there is an advantage in that the object stored in the storage box (A) can be easily discharged into the container (7).

[0060] FIGS. 10 and 11 illustrate a second embodiment according to the present invention, wherein a slider (44) is slidably coupled to the lower side of the storage box (A) in the forward and backward direction, and a position adjustment means (45) connected to the slider (44) to adjust the forward and backward position of the slider (44) is provided, and the fixed wheel (30) is provided on the lower side of the slider (44) so ​​as to be spaced apart from each other in the lateral direction, so that the position of the fixed wheel (30) can be adjusted in the forward and backward direction by operating the position adjustment means (45).

[0061] To this end, guide members (14) extending in the front-rear direction are provided on both sides of the lower side of the storage box (A).

[0062] And, the slider (44) is configured in a panel shape that extends laterally, and both ends are slidably coupled to the guide member (14).

[0063] At this time, the fixed wheel (30) is provided on the lower side of the slider (44) so ​​as to be spaced laterally from each other.

[0064] The position adjustment means (45) is rotatably coupled to the lower side of the opening / closing plate (12) so as to extend in the front-rear direction, and the middle part is composed of a lead screw (45a) screwed to penetrate the slider (44) in the front-rear direction, and a drive motor (45b) provided on the lower side of the opening / closing plate (12) and connected to the lead screw (45a).

[0065] At this time, the handle (43) is equipped with a switch for controlling the drive motor (45b).

[0066] Accordingly, when the operator controls the operation of the drive motor (45b) with the switch to rotate the lead screw (45a) in forward and reverse directions, the slider (44) and the fixed wheel (30) slide in the forward and backward directions due to the screw action of the lead screw (45a).

[0067] The transport cart configured in this manner has the advantage that, when an object is stored in the storage box (A), the user can easily make the storage box (A) level by adjusting the forward and backward position of the fixed wheel (30) according to the center of gravity of the object stored in the storage box (A).

[0068] That is, when placing an object such as a chip or component into the storage box (A), the object may be placed towards the front or rear of the storage box (A), and in such cases, the center of gravity of the object may be formed at the front or rear of the fixed wheel (30).

[0069] In this case, a lot of force is required to make the storage box (A) horizontal so that the front and rear casters (41, 42) are spaced apart from the ground.

[0070] However, in the case of the present invention, as shown in FIG. 11, the position of the fixed wheel (30) can be adjusted in the forward and backward direction using the position adjustment means (45). By moving the fixed wheel (30) to the center of gravity of the object, the storage box (A) can be made horizontal without applying much force, thus providing the advantage of being more convenient to use. Explanation of the symbols

[0071] A. Storage Box 30. Fixed Wheel 41,42. Front and rear casters

Claims

Claim 1 A storage box (A) configured with a cylindrical shape having an open top surface, a pair of fixed wheels (30) provided on both sides of the central part of the storage box (A), and front and rear casters (41, 42) provided on the front and rear of the storage box (A), wherein the lower circumferential surface of the front and rear casters (41, 42) is positioned higher than the lower circumferential surface of the fixed wheels (30), so that when the storage box (A) is in a horizontal state, the front and rear casters (41, 42) are spaced upward from the bottom surface; further comprising a slider (44) coupled to the lower surface of the storage box (A) so as to be slidable in the front and rear direction, and a position adjustment means (45) connected to the slider (44) to adjust the front and rear position of the slider (44), wherein the fixed wheels (30) are provided to be spaced laterally from each other on the lower surface of the slider (44), so that when a heavy object is loaded in the storage box (A), the position adjustment means (45) A transport cart characterized by being able to adjust the position of the slider (44) in the forward and backward directions so that the fixed wheel (30) is positioned below the center of gravity of the object loaded in the storage box (A). Claim 2 delete Claim 3 A transport cart according to claim 1, characterized in that a coupling hole (11a) is formed in the upper perimeter of the storage box (A), and the transport cart can be lifted upward using a device inserted into the coupling hole (11a). Claim 4 In claim 3, the storage box (A) comprises a main body (11) with open upper and lower surfaces, an opening / closing plate (12) which is rotatably coupled to one side of the lower end of the main body (11) in an up-and-down direction and rotates in an up-and-down direction to open and close the lower side of the main body (11), and a fixing means (20) which is provided on the main body (11) and coupled to the front end of the opening / closing plate (12) to fix the opening / closing plate (12) so as to block the lower side of the main body (11); wherein the fixing means (20) comprises a pivot bracket (21) provided on the lower side of the perimeter surface of the main body (11), a horizontal part (22a) extended laterally, a vertical part (22b) extended upward from one end of the horizontal part (22a), and a support piece (22c) provided to extend toward the opening / closing plate (12) from the lower perimeter surface of the horizontal part (22a). A transport cart characterized by including a fixed lever (22) in which a horizontal portion (22a) is rotatably coupled to the pivot bracket (21), and a fixed member (23) which is movably coupled to a lifting guide provided on the circumferential surface of the main body (11) and has a connecting member on one side that is coupled to the upper end of the vertical portion (22b) of the fixed lever (22). Claim 5 delete

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