JP2014088140A - Handcart - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a handcart having good operation property and high workability.SOLUTION: The handcart 10 comprises a plurality of wheels 12-15 and a handle 16 gripped by a worker Mn disposed in a frame 20. In the frame is disposed a rotary shaft 18 and the rotary shaft 18 comprises a plurality of storage portions 30. This enables the storage portions 30 to adjust distance from the handle 16 and to switch the respective positions vertically. The plurality of storage portions 30 are arranged at equal intervals to each other in the outer periphery of the rotary shaft 18. To the frame 20 is attached an electric motor 51 and output of the electric motor 51 displaces and moves the storage portions 30.

Description

  The present invention relates to an improved technique for a hand cart.

  When shopping in a store, he sometimes purchases and transports heavy items. In such a case, a hand cart is used. The hand cart has a storage unit for placing products. An operator places an arbitrary product on the storage unit and manually pushes the cart to carry the product (see, for example, Patent Document 1 (FIG. 1)).

  A hand cart as shown in Patent Document 1 includes a frame, a plurality of wheels, and a handle that an operator holds. In front of the handle, an upper storage part for placing a load is provided, and a lower storage part for placing the load is provided below the upper storage part.

  According to such a hand cart, when a heavy article is placed on the upper article storage unit, the center of gravity is increased. As the center of gravity increases, the maneuverability of the cart decreases. On the other hand, when a heavy article is placed on the lower storage unit, the heavy article is placed on a low position, so it is difficult to transfer the heavy article from the hand cart to the cash register. That is, workability is reduced.

Japanese Patent No. 4558532

  An object of the present invention is to provide a hand cart with good maneuverability and high workability.

The invention according to claim 1 is a push cart provided with a plurality of wheels and a handle grasped by an operator on a frame.
The frame includes at least one storage unit capable of adjusting a distance from the handle.

  The invention according to claim 2 is characterized in that there are a plurality of the storage units and the positions thereof can be interchanged.

  The invention according to claim 3 is characterized in that the storage unit is configured to be interchangeable up and down.

In the invention according to claim 4, the frame is provided with a rotation shaft,
The said storage part is attached to the said rotating shaft.

  The invention according to claim 5 is characterized in that the plurality of storage units are arranged on the outer periphery of the rotating shaft at regular intervals.

  The invention according to claim 6 is characterized in that the plurality of storage parts are arranged apart from each other.

The invention according to claim 7 is a push cart provided with a plurality of wheels and a handle grasped by an operator on a frame.
A rotating shaft provided on the frame, and a plurality of storage units that are supported by the rotating shaft and turn around the rotating shaft.

  The invention according to claim 8 is characterized in that an electric motor is attached to the frame, and the storage unit is displaced by the output of the electric motor.

In the invention according to claim 1, the frame includes a storage unit that can adjust the distance from the handle. When placing a load on the storage unit, the storage unit can be moved near the handle, and the load can be placed near the handle. The handle is a part that is gripped by the operator, and is generally provided at a part that is easy for the worker to grip. When the load is to be transferred to the storage unit, the load is transferred to the storage unit located near the handle. The operator can easily perform the load replacement work at a height at which it is easy to perform the replacement work. The same applies to the case where the luggage placed on the storage unit is lowered.
On the other hand, after placing the load on the storage unit, the storage unit is moved to a lower position away from the handle. Thereby, a heavy article is moved to a low position and a gravity center is lowered. Since the center of gravity is low, it is possible to ensure high maneuverability of the hand cart even when a load is placed on the storage unit.
That is, it can be said that the hand cart according to the present invention has high maneuverability and high workability.

  In the invention according to claim 2, there are a plurality of storage units, and the positions of the storage units can be interchanged. After placing the load on one storage unit, the storage unit on which the load is placed is moved. While moving the storage part on which the luggage is placed, the storage part on which the luggage is not placed is moved to a position where the luggage can be easily placed. A large amount of luggage can be placed while ensuring high workability.

  In the invention which concerns on Claim 3, a storage part is a structure which can be switched up and down. That is, the storage unit can be adjusted in the height direction. Thereby, particularly high workability can be obtained.

  In the invention which concerns on Claim 4, the storage part is attached to the rotating shaft. That is, the distance from the handle is adjusted by rotating the storage unit about the rotation axis. Since the storage unit is rotated by the rotation shaft, the configuration is simple. Moreover, a storage part can be moved smoothly by rotating.

  In the invention which concerns on Claim 5, the storage part is arrange | positioned on the outer periphery of a rotating shaft, maintaining a mutually equal space | interval. That is, the interval between the storage units is constant. After placing the load on a certain storage unit, the next storage unit is set at a place where the load can be easily placed by rotating the rotation shaft by a predetermined angle. Since the next storage unit is set every time it rotates by a predetermined amount, it is easy to handle.

  In the invention which concerns on Claim 6, the storage part is arrange | positioned mutually spaced apart. For example, when a hand cart is used as a shopping cart for food, it is possible to place a cold object such as frozen food in one storage part and a warm object such as a side dish in a different storage part. That is, since they are separated from each other, it is difficult for heat to be transmitted to each other's luggage. Bags of various temperatures can be placed on a single cart.

In the invention which concerns on Claim 7, it has the rotating shaft provided in the flame | frame, and the some storage part supported on this rotating shaft and turning centering on a rotating shaft. By rotating the rotating shaft, the distance of the storage unit relative to the handle can be adjusted. When placing a load on the storage unit, the storage unit can be moved near the handle, and the load can be placed near the handle. The handle is a part that is gripped by the operator, and is generally provided at a part that is easy for the worker to grip. When the load is to be transferred to the storage unit, the load is transferred to the storage unit located near the handle. The operator can easily perform the load replacement work at a height at which it is easy to perform the replacement work. The same applies to the case where the luggage placed on the storage unit is lowered.
On the other hand, after placing the load on the storage unit, the storage unit is moved to a lower position away from the handle. Thereby, a heavy article is moved to a low position and a gravity center is lowered. Since the center of gravity is low, it is possible to ensure high maneuverability of the hand cart even when a load is placed on the storage unit.
That is, it can be said that the hand cart according to the present invention has high maneuverability and high workability.

  In addition, there are a plurality of storage units. By rotating these storage parts, the positions of each other can be exchanged. After placing the load on one storage unit, the storage unit on which the load is placed is moved. While moving the storage part on which the luggage is placed, the storage part on which the luggage is not placed is moved to a position where the luggage can be easily placed. A large amount of luggage can be placed while ensuring high workability.

  Furthermore, the storage unit is configured to be interchangeable up and down. That is, the storage unit can be adjusted in the height direction. Thereby, particularly high workability can be obtained.

  In addition, the storage unit is attached to the rotating shaft. Since the storage unit is rotated by the rotation shaft, the configuration is simple. Moreover, a storage part can be moved smoothly by rotating.

  In the invention which concerns on Claim 8, a storage part is displaced by the output of an electric motor. When the operator operates the operation and stop of the electric motor, the storage unit moves. That is, since the storage unit can be moved only by turning on and off the electric motor, operability can be improved.

It is a right view of the hand cart according to the first embodiment. FIG. 2 is a sectional view taken along line 2-2 of FIG. FIG. 2 is a perspective view of the hand cart shown in FIG. 1. It is a perspective view of the storage part shown by FIG. It is a figure explaining the effect | action at the time of mounting a load on the storage part shown by FIG. It is a figure explaining the effect | action at the time of displacing the storage part in which the load shown by FIG. 5 was mounted. It is a side view of the hand cart according to the second embodiment. It is a side view of the hand cart according to Example 3.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
In the description, left and right refer to the left and right with reference to the worker holding the handle, and front and rear refer to the front and rear with respect to the traveling direction of the hand cart.
In the figure, Fr indicates the front, Rr indicates the rear, L indicates the left when viewed from the operator, R indicates the right when viewed from the operator, Up indicates the top, and Dw indicates the bottom.

The structure of the hand cart according to the first embodiment will be described with reference to FIGS.
The hand cart 10 shown in FIGS. 1 to 3 exemplifies a hand cart for shopping.

  As shown in FIGS. 1 to 3, the hand cart 10 is integrally attached to a frame 20, four wheels 12 to 15 attached to a lower portion of the frame 20, and a rear end of the frame 20. Left and right handles 16L, 16R (L is a subscript indicating the left, R is a subscript indicating the right. The same applies hereinafter) and left and right support columns 17L raised from the approximate center of the frame 20 in the front-rear direction. , 17R, a rotatable rotating shaft 18 spanned between the upper ends of these columns 17L, 17R, four arms 19 extending from the left and right ends of the rotating shaft 18 to the outer periphery, It comprises four storage units 30 for supporting a load supported by the arm 19 and a rotation mechanism 50 attached to the right end of the rotary shaft 18 for rotating these storage units 30.

  The frame 20 has a substantially rectangular shape in a plan view and a substantially L shape in a side view. The frame 20 is configured by a pipe-shaped steel material. Specifically, a front frame 21 extending in the vehicle width direction at the front portion, left and right side frames 22L and 22R extending rearward from both ends of the front frame 21, and the left and right side frames 22L , 22R and upper left and right upper frames 23L, 23R extending upward from the rear end. A separate rear frame 24 is stretched between the rear ends of the left and right side frames 22L, 22R.

  Free casters are used for the four wheels 12-15 attached to the lower portions of the left and right side frames 22L, 22R. The four wheels 12 to 15 are provided at the left front wheel 12 attached to the front end of the left side frame 22L, the left rear wheel 13 (see FIG. 2) attached to the rear end of the left side frame 22L, and the front end of the right side frame 22R. It consists of a right front wheel 14 to be attached and a right rear wheel 15 attached to the rear end of the right side frame 22R.

  The left handle 16L extends from the upper end of the left upper frame 23L to the rear end. The left handle 16L is covered with a left grip 16La. The same applies to the right handle 16R. That is, the right handle 16R extends from the upper end of the right upper frame 23R to the rear end. The right handle 16R is covered with a right grip 16Ra.

  In addition to the front frame 21, the left and right side frames 22L and 22R, and the left and right upper frames 23L and 23R, the left and right handles 16L and 16R are formed by bending one pipe.

  Reinforcing portions 17a and 17a are formed at the lower end of the left column 17L to reinforce the left column 17. The reinforcing portions 17a and 17a are constituted by two substantially triangular plates. The reinforcing portions 17 a and 17 a have one side of the triangle joined to the left side frame 22 and the other side joined to the left support column 17. Such reinforcing portions 17a, 17a are formed at two places before and after the left column 17L. The same applies to the lower end of the right column 17R.

  A bearing portion 17b for rotatably supporting the rotary shaft 18 is formed at the upper end of the left column 17L. A cylindrical roller bearing is attached to the bearing portion 17b. The same applies to the upper end of the right column 17R. The rotating shaft 18 is rotatably supported by inserting both ends of the rotating shaft 18 into the inner rings of the bearing portions 17b and 17b.

  All the arms 19 attached to the rotating shaft 18 every 90 ° have the same length. The arm 19 extending from the left end of the rotating shaft 18 and the arm 19 extending from the right end of the rotating shaft 18 are opposed to each other. That is, the left and right corresponding arms 19 are paired with each other.

  Pin support portions 19a are formed at the tips of the arms 19, and pins 19b are press-fitted into these pin support portions 19a. The pin 19 b cannot rotate with respect to the arm 19.

  The four storage units 30 are swingably supported by the pair of left and right arms 19. The storage unit 30 is swingably attached to the pin 19b and is formed of a swing arm 31 that is hung between the opposing arms 19, and a tray 40 that is supported by the swing arm 31 and on which the bag Ba as a load is placed. Has been.

  The swing arm 31 includes a pair of shaft portions 31a and 31a inserted into the pin 19b and two rod-shaped members 31b and 31c that connect the pair of shaft portions 31a and 31a. One rod-shaped member 31b has a substantially U-shape and is attached toward the front and lower side between the pair of shaft portions 31a and 31a. The other rod-shaped member 31c is substantially U-shaped, and is attached toward the rear lower side between the pair of shaft portions 31a and 31a. When viewed from the side, the rod-shaped members 31b and 31c have an inverted V shape with the shaft portion 31a as a vertex. A tray 40 is placed on a portion of the rod-shaped members 31b and 31c extending in the vehicle width direction. The bottom 41 of the tray 40 supported so as to be swingable is kept horizontal. The details of the tray 40 will be described in detail in the next figure.

  As shown in FIG. 4A, the tray 40 includes a bottom portion 41 on which a load is placed and side walls 42 and 42 raised from both ends of the bottom portion 41 in the vehicle width direction. It has a letter shape and is integrally formed. A front wall portion 43 extending in the vehicle width direction at the front portion of the bottom portion 41 is swingably attached to the bottom portion 41 via hinges 44 and 44. The same applies to the rear wall portion 45. That is, the rear wall portion 45 extending in the vehicle width direction at the rear portion of the bottom portion 41 is swingably attached to the bottom portion 41 via the hinges 44 and 44.

  Nail hooks 46 are attached to the front upper portions of the side walls 42, 42, respectively. Claw hooks 46 are also attached to the rear upper portions of the side walls 42, 42, respectively. At both ends in the vehicle width direction of the front wall portion 43, hook-like claw portions 47, 47 that can be engaged with the claw hook portion 46 are formed. Hook-like claw portions 47 that can engage with the claw hook portion 46 are also formed at both ends of the rear wall portion 45 in the vehicle width direction.

  As shown in FIG. 4B, the front wall portion 43 can be kept upright by engaging the claw portion 47 with the claw hook portion 46. The same applies to the rear wall portion 45.

  As shown in FIG. 4C, the claw portion 47 can be removed from the claw hook portion 46 by grasping and pulling the knob portion 47 a extending from the claw portion 47 toward the outside in the vehicle width direction. By removing the claw portion 47 from the claw hanging portion 46, the front wall portion 43 falls down. The same applies to the rear wall portion 45. For example, the claw portion 47 can be easily attached to and detached from the claw hook portion 46 by bending the claw portion 47 using resin as a material of the claw portion 47.

  When placing a luggage larger than the tray 40, the luggage can be placed by tilting the front wall portion 43 or the rear wall portion 45. That is, even a luggage larger than the tray can be placed. Moreover, a large load can be placed without protruding from the frame (reference numeral 20 in FIG. 1). When the baggage protrudes from the frame, it is necessary to steer the hand cart 10 more carefully than usual so that the baggage does not come into contact with an external installation. However, according to the present invention, since a large load can be placed without protruding from the frame, it is possible to place a large load while ensuring normal maneuverability.

  1 to 3, the rotation mechanism 50 includes an electric motor 51 supported by an upper bracket 61 attached to the right support column 17 </ b> R, and a worm 52 attached to a motor shaft 51 a of the electric motor 51. The worm wheel 53 meshes with the worm 52 and is attached to the rotary shaft 18, and the battery 54 is supported by the lower bracket 62 attached to the right column 17R. The battery 54 is a power source for operating the electric motor 51. The rotation mechanism 50 is covered by a cover 63 attached to the lower bracket 62.

  A switch 70 for operating the rotation mechanism 50 is attached in front of the right grip 16Ra of the right handle 16. As the switch 70, a seesaw switch can be used. Details of the hand cart 10 having such a configuration will be described in the following drawings.

  As shown in FIG. 5, at the time of shopping, the worker Mn places a bag such as a bag Ba or a product Me on the storage unit 30 near the handle 16.

  As shown in FIG. 6, when the luggage is loaded, the worker Mn pushes the switch 70 toward the front.

  Returning to FIG. 1, when the switch 70 is pressed, the electric motor 51 is activated. When the electric motor 51 operates, the worm 52 rotates together with the motor shaft 51a. As a result, the worm wheel 53 is also rotated and the storage unit 30 is rotated via the rotation shaft 18.

  Returning to FIG. 6, when the worker Mn pushes the switch 70 forward, the storage unit 30 rotates counterclockwise. When the hand is released, the storage unit 30 stops rotating. When the switch 70 is pushed forward, the storage unit 30 rotates clockwise. The worker Mn rotates the storage unit 30 until the storage unit 30 on which the product Me is placed moves downward and the storage unit 30 on which only the bag Ba is mounted moves to the front of the handle 16.

  When placing the bag Ba or the product Me on the storage unit 30, the storage unit 30 can be moved near the handle 16 and the bag Ba or the product Me can be mounted near the handle 16. The handle 16 is a part that is grasped by the worker Mn, and is generally provided at a part that is easily grasped by the worker Mn. When the bag Ba or the product Me is transferred to the storage unit 30, the bag Ba or the product Me is transferred to the storage unit 30 located in the vicinity of the handle 16. The worker Mn can easily perform the replacement work of the bag Ba or the product Me at a height at which it is easy to perform the replacement work. The same applies to the case where the bag Ba or the product Me placed on the storage unit 30 is lowered.

On the other hand, after placing the bag Ba or the product Me on the storage unit 30, the storage unit 30 is moved to a lower position away from the handle 16. Thereby, a heavy article is moved to a low position and a gravity center is lowered. Since the center of gravity is low, high maneuverability of the hand cart 10 can be ensured even when the bag Ba or the product Me is placed on the storage unit 30.
That is, it can be said that the hand cart 10 according to the present invention has high maneuverability and high workability.

  Furthermore, there are a plurality of storage units 30 and their positions can be interchanged. After placing the product Me on one storage unit 30, the storage unit 30 on which the product Me is placed is moved. While moving the article storage unit 30 on which the product Me is placed, the article storage unit 30 on which the product Me is not placed is moved to a position where the product Me is easily placed. Many products Me can be placed while ensuring high workability.

  In addition, the storage unit 30 is configured to be interchangeable up and down. That is, the storage unit 30 can be adjusted in the height direction. Thereby, particularly high workability can be obtained.

  Furthermore, the storage unit 30 is attached to the rotary shaft 18. That is, the distance between the handle 16 and the handle 16 is adjusted by rotating around the rotating shaft 18. Since the storage unit 30 is rotated by the rotating shaft 18, the configuration is simple. Moreover, the storage part 30 can be smoothly moved by rotating.

  In addition, the storage unit 30 is arranged on the outer periphery of the rotary shaft 18 with an equal interval therebetween. That is, the interval between the storage units 30 is constant. After placing the product Me on a certain storage unit 30, the next storage unit 30 is set at a place where the product Me is easily placed by rotating the rotary shaft 18 by a predetermined angle. Since the next storage unit 30 is set every time the predetermined amount is rotated, the handling is easy.

  Furthermore, the storage part 30 is arrange | positioned mutually spaced apart. For example, when the hand cart 10 is used as a shopping cart for food, a cold object such as frozen food is placed on one storage part 30, and a warm object such as a prepared dish is placed on a different storage part 30. Can do. That is, since they are separated from each other, it is difficult for heat to be transmitted to each other's luggage. A bag of various temperatures can be placed on one hand cart 10.

  In addition, the storage unit 30 is displaced by the output of the electric motor 51. When the worker Mn operates the electric motor 51 to operate and stop, the storage unit 30 moves. That is, since the storage unit 30 can be moved only by turning the electric motor 51 on and off, the operability can be improved.

  Furthermore, the direction in which the storage unit 30 rotates coincides with the direction in which the switch 70 is pressed. For this reason, rotation operation of the storage part 30 is easy.

  In addition, referring also to FIG. 1, the power of the electric motor 51 is transmitted to the rotating shaft 18 by a worm gear mechanism including a worm 52 and a worm wheel 53. By placing the product Me, force is applied to the rotating shaft 18 in the rotation direction depending on the weight of the product Me. In this case, the worm 52 serves as a stopper and prevents the storage unit 30 from rotating. That is, by adopting the worm gear mechanism, it is not necessary to separately provide a rotation prevention device for preventing unintentional rotation of the storage unit 30. As a result, the number of parts can be reduced.

  The rotation mechanism 50 may further include a rotation amount detection sensor that detects the rotation amount of the rotation shaft 18 and a control unit that controls on / off of the electric motor 51. By providing these, the operator Mn can press the switch 70 once to rotate the storage unit 30 by a predetermined angle. That is, the operator Mn does not need to keep pressing the switch 70 until the storage unit 30 moves to a predetermined position, and the operation becomes easy.

Next, a second embodiment of the present invention will be described with reference to the drawings.
FIG. 7 shows a side surface of the hand cart 10A according to the second embodiment. FIG. 7 is shown corresponding to FIG. With respect to the hand cart according to the first embodiment, the number of the storage units 30 is two. The storage units 30 are arranged with an interval of 180 ° from each other. Even in the hand cart 10A in which the number of the storage units 30 is two, the predetermined effect of the present invention can be obtained.

Next, Embodiment 3 of the present invention will be described with reference to the drawings.
FIG. 8 shows a side surface of the hand cart 10B according to the third embodiment. FIG. 8 is shown corresponding to FIG. With respect to the hand cart according to the first embodiment, the number of the storage units 30 is three. The storage units 30 are arranged with an interval of 120 ° from each other. Even in the hand cart 10B in which the number of the storage units 30 is three, the predetermined effect of the present invention can be obtained. That is, the number of the storage units 30 may be an odd number.

  Although the hand cart according to the present invention has been described by taking a shopping cart as an example, it can be used for various purposes by changing the direction in which the rotation shaft is arranged and the shape of the mounting portion. For example, the golf cart can be configured as a golf cart in which the rotation axis is arranged in the vertical direction of the frame and the golf bag is placed on the storage unit. That is, the hand cart is not limited to the hand cart for shopping.

  Moreover, although demonstrated based on the example in which two to four storage parts were provided, five or more storage parts may be provided. Furthermore, the number of the storage unit may be one.

  Furthermore, although the manual cart pushed by the operator has been described as an example, the manual cart may include a motor for traveling. In addition, it may be a cart that moves on a predetermined track by automatic driving. In other words, it is not limited to carts that are always moved by hand, and may be anything that includes use by hand.

  The hand cart of the present invention is suitable for a hand cart for shopping.

  10, 10A, 10B ... hand cart, 12-15 ... wheels, 16 ... handle, 18 ... rotating shaft, 20 ... frame, 30 ... storage unit, 51 ... electric motor, Mn ... worker, Ba ... bag (luggage), Me: Goods (luggage).

Claims (8)

In a hand cart having a frame, a plurality of wheels, and a handle grasped by an operator,
The hand cart, wherein the frame includes at least one storage unit capable of adjusting a distance from the handle.   The hand cart according to claim 1, wherein a plurality of the storage units are configured to be interchangeable with each other.   The hand cart according to claim 2, wherein the storage unit is configured to be interchangeable up and down. The frame is provided with a rotation shaft,
The hand cart according to claim 2 or 3, wherein the storage unit is attached to the rotating shaft.   The hand cart according to claim 4, wherein the plurality of storage units are arranged on the outer periphery of the rotating shaft at regular intervals.   The hand cart according to any one of claims 2 to 4, wherein the plurality of storage units are arranged apart from each other. In a hand cart having a frame, a plurality of wheels, and a handle grasped by an operator,
A hand cart comprising: a rotating shaft provided on the frame; and a plurality of storage units that are supported by the rotating shaft and pivot about the rotating shaft.   The hand cart according to any one of claims 1 to 7, wherein an electric motor is attached to the frame, and the storage unit is displaced by an output of the electric motor.

Images