JP2003226404A - Carriage and picking work supporting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve a labor condition by reducing physical suffering in accompany with the work by allowing a worker to perform the specific work at an optimum height. <P>SOLUTION: This carriage 3 has wheels 34 on its lower face, is capable of performing hand tramming, and has a horizontal supporting place 4 opened at its tip part and having a width narrower than an interval between wheels of a pallet with wheels. The supporting plate 4 is supported by a vertically movable elevating mechanism 5, so that it can be lowered to a position to allow the pallet with wheels to take in and out with respect to the supporting plate 4. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hand truck having wheels on its lower surface and capable of being manually pushed. In particular, the present invention relates to a hand truck suitable for performing work such as picking in a warehouse or factory. The present invention relates to a trolley and a picking work support device using the trolley.

[0002]

2. Description of the Related Art Generally, a warehouse or a factory is provided with an article storage space for storing a large number of articles of a plurality of types. A storage shelf is installed in this article storage space, and a large number of articles are stored by type on the storage shelf. Upon receipt of an order, the worker puts a container for picking work on the hand truck, moves the hand truck along the storage shelf, and removes the required number of items on the slip from the storage shelf and puts them in the container. Go on. This operation is generally called "picking".

As shown in FIG. 17, the hand truck is capable of stacking a plurality of containers 101a and 101b in a plurality of stages. The first stage container 10 by picking work
When 1a becomes full, empty container 101b is stacked on the full container 101a, and then the upper container 10a is stacked.
Put picked articles in 1b. When the picking work is completed, the worker pushes the hand cart 100 to move to the delivery department. In the delivery department, all containers 101a,
After unloading 101b from the hand truck 100, it returns to the article storage space again and the same picking work is performed.

[0004]

The above-mentioned picking work imposes a heavy burden on workers due to the following reasons, and improvement of working conditions is required. (1) When the picked article is put in the container placed on the hand cart, the first-stage container is at a low position.
The operator needs to bend down. This posture is extremely painful for the worker, and if the user bends and stretches his or her back repeatedly, the load is placed on the back and causes back pain. (2) When unloading a container from the hand cart to the ground, especially when the container is full and the weight is heavy, it is a heavy labor for the worker, and repeating this unloading work causes the worker to be significantly fatigued. The above-described technical problem is not limited to picking work, but may be a work other than picking, for example, a work such as taking out parts from a container and assembling a machine.

The object of the present invention is to reduce the physical pain associated with work and to improve working conditions by allowing the worker to perform a predetermined work at an optimum height. is there.

Another object of the present invention is to make it possible to load and unload articles to and from a hand truck by using a pallet with wheels, thereby facilitating the loading and unloading of articles and reducing operator fatigue. To alleviate.

More specifically, the object of the present invention is to enable an operator to perform picking work at an optimum height and to load and unload a container for picking work from a hand truck. By using a pallet with wheels, it is possible to reduce the physical pain associated with picking work and improve working conditions.In addition, the loading and unloading of containers for picking work can be facilitated. It is an object of the present invention to provide a hand truck and a picking work support device that reduce fatigue of the user.

[0008]

A hand truck according to the present invention has a wheel on its lower surface and can be pushed by hand.
It has a horizontal support plate. The support plate is supported by an elevating mechanism capable of elevating.

In the above-mentioned structure of the present invention, the "support plate" is for supporting an object from below, and the object to be supported is the object itself, the packaging box of the object, the working container, or the like. According to.

In order to perform work using this hand truck, the support plate is moved up and down by the elevating mechanism and positioned at a height suitable for the work. Since the worker can work at the optimum height,
There is no need to bend over and the physical pain associated with work is reduced.

Further, the hand truck according to the present invention has a horizontal support plate whose tip portion is released and which has a width narrower than the wheel interval of the wheeled pallet. The support plate is supported by an elevating mechanism capable of elevating and lowering so that the pallet with wheels can be lowered into and out of the support plate.

In the above structure of the present invention, "the tip is released" means "the state where the tip is not supported".
Means Since the front end of the support plate is released, the wheeled pallet can be inserted into and removed from the front end of the support plate. Further, since the support plate is formed to have a width narrower than the wheel interval of the wheeled pallet, the wheeled pallet is supported on the support plate while straddling the support plate. Further, since the support plate can be moved up and down to a position where the wheeled pallet can be pulled in and out of the support plate, the wheeled pallet can be manually pushed in and out of the support plate.

Prior to the work, the supporting plate is lowered by the elevating mechanism, and the pallet with wheels on which the articles related to the work are placed is introduced onto the supporting plate. Next, the elevating mechanism raises the support plate to orient it at a height suitable for the work and perform a predetermined work. After the work, the support plate is lowered by the elevating mechanism, and the pallet with wheels on which the articles related to the work are placed is drawn out from the support plate. According to the present invention, since the worker can work at an optimum height, it is not necessary to bend over and the physical pain associated with the work is reduced. Further, since the loading and unloading of the articles to and from the hand cart can be performed by using the pallet with wheels, the loading and unloading of the articles is easy and the operator's fatigue is reduced.

Various embodiments are conceivable as the lifting mechanism for the hand truck. The lifting mechanism according to a preferred embodiment includes a balance weight having a predetermined load and a pulling mechanism that pulls up the support plate by causing a force due to the load of the balance weight to act upward on the support plate. When the included load is smaller than the load of the balance weight, the support plate rises, and when the load including the support plate is larger than the load of the balance weight, the support plate descends.

In the configuration of the above-mentioned embodiment, the "balance weight" is for facilitating and facilitating the raising and lowering operation of the support plate without using the power. When the total load when placing an article on the support plate is smaller than the load of the balance weight, the support plate rises, and when the total load is larger than the load of the balance weight, the support plate descends.
No special drive source such as a motor is required to move the support plate up and down, and there is no problem of power consumption.

One embodiment of the pulling mechanism is an endless chain stretched between upper and lower wheels, and the chain is connected to a base end portion of a support plate at an inner portion with the wheels sandwiched therebetween. The balance weight is connected to the outer portion.

In another preferred embodiment, the lifting mechanism has a pressure tank set to a predetermined air pressure, a cylinder mechanism in which a piston is actuated by the air pressure of the pressure tank, and a piston of the cylinder mechanism with respect to a support plate. And a pulling mechanism for pulling up the support plate by acting a force exerting upward, the support plate rises when the load including the support plate is smaller than the force applied to the piston, and the load including the support plate is increased. The support plate descends when the force applied to the piston is larger than that.

In the structure of the above-mentioned embodiment, the "pressure tank" is, like the balance weight, for making the lifting and lowering operation of the support plate possible and easy without using power. The support plate rises when the total load when the article is placed on the support plate is smaller than the force applied to the piston, and the support plate descends when the total load is larger than the force applied to the piston. Therefore, a special drive source such as a motor is not required to raise and lower the support plate, and there is no problem of power consumption.

An embodiment of the pulling mechanism is a wire suspended on a pulley, one end of which is connected to a base end of a support plate, and the other end of which is a tip of a piston rod. Are connected.

In a preferred embodiment of using the hand truck according to the present invention for picking work, the lifting mechanism draws at least a wheeled pallet capable of loading containers for picking work onto a support plate. There is provided a mechanism capable of orienting the support plate at a first work position for putting in and a second work position for carrying out work for putting picked articles into the container.

According to this embodiment, when the wheeled pallet loaded with the containers for picking work is to be loaded and unloaded into and from the hand cart, the support plate is positioned at the first working position.
Further, when performing the picking work, the support plate is positioned at the second work position. As a result, it is possible to easily load and unload the container for picking work with respect to the hand truck, and the worker can perform picking work at an optimum height.

When the hand truck according to the present invention is defined as a device for supporting picking work, the picking work support device according to the present invention has a wheeled pallet capable of accommodating containers for picking work and a lower surface of the pallet. And a hand truck having wheels and capable of being manually pushed. The hand truck has a horizontal support plate whose tip is released and has a width narrower than the wheel interval of the wheeled pallet. The support plate is supported by an elevating mechanism capable of elevating and lowering so that the support plate can be lowered to a position where the wheeled pallet can be inserted and removed. The elevating mechanism has at least a first working position for loading and unloading the wheeled pallet onto a support plate and a second working position for carrying out a work for putting picked articles into the container. It is equipped with a mechanism that can position the support plate.

According to the picking work support apparatus of the present invention, since the worker can perform the picking work at the optimum height, it is not necessary to bend over and the physical pain associated with the picking work is reduced. Further, since the picking container can be loaded and unloaded from the hand truck using the pallet with wheels, the loading and unloading of the container is easy and the operator's fatigue is reduced.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a situation in which a worker M is performing a picking work using a picking work support apparatus 1 according to a first embodiment of the present invention. In the figure, 9 is a storage shelf in which a plurality of storage boxes 90 are arranged, and each storage box 90 stores different articles A to H.

The picking work support apparatus 1 of the illustrated example has a wheeled pallet 2 on which a plurality of containers 10 for picking work can be stacked, and a wheeled pallet 2 in a state where a plurality of containers 10 are stacked. It consists of a hand truck 3 that can be placed.

The wheeled pallet 2 is, as shown in FIG.
Free wheels 21 are attached to the lower surface of the support substrate 20 at four corners. The upper surface of the support substrate 20 has a space that allows two box-shaped containers 10 for picking work to be lined up and stacked. The container 10 is made of synthetic resin and has an open top surface, and the same container 10 can be stacked on the open surface. In this embodiment, a container 10 that can be easily assembled and disassembled is used, and the disassembled container 10 is used as a front wall portion 31 and a rear wall portion 3 of the hand truck 3.
One pocket 35 is provided in each of the two pockets.

The body 30 of the hand truck 3 is of a form surrounded on three sides by a front wall portion 31, a rear wall portion 32 and a side wall portion 33, and the lower surfaces of the front wall portion 31 and the rear wall portion 32. Wheels 34 are respectively attached to both ends of the. In the rear wall portion 32, in addition to the pocket 35 described above, a handle 36 for manual pushing operation, a braking lever 37 constituting a braking mechanism 60 described later, and a handle 38 for rotating operation constituting the lifting mechanism 5 described later. Has been deployed.

In the space surrounded by the front wall portion 31, the rear wall portion 32, and the side wall portion 32 of the machine body 30, a horizontal support plate 4 is vertically movable. The support plate 4 is provided with a pair of support surfaces 4a and 4b sandwiching an open portion 4c at the center of the width, and the tip of the support plate 4 is released.

The distance s between the front wall portion 31 and the rear wall portion 32 is larger than the width D of the support substrate 20 of the wheeled pallet 2. Further, the width d of the support plate 4 is equal to that of the free wheel 2 of the pallet 2 with wheels.
It is narrower than the interval t between 1 and 21. With such a dimension setting, the wheeled pallet 2 can be supported on the support plate 4 inside the machine body 30 while straddling the support plate 4.

The support plate 4 is, as shown in FIG.
The pallet 2 with wheels is supported by an elevating mechanism 5 capable of elevating and lowering so as to be able to descend to a position where the pallet 2 with wheels can be inserted and removed. An upward back plate 40 is formed at the base end portion of the support plate 4, and a connecting portion 41 is provided at a substantially central portion of the height of the back plate 40, and guide rollers 42, 42 are provided at both end positions of the upper end portion. Two are provided for each. The connecting portion 41 is connected to the chain 50 of the lifting mechanism 5. Each guide roller 42 is slidably supported by a guide rail 56 provided at each end of the side wall 32.

The lifting mechanism 5 includes a balance weight 57 with a predetermined load and a balance weight 5 with respect to the support plate 4.
And a pull-up mechanism 58 for pulling up the support plate 4 by applying a force due to the load of 7 upward. The lifting mechanism 58
Is composed of an endless chain 50 stretched between sprocket wheels 51 and 52 arranged on the upper and lower portions of the side wall portion 33. The movement of the chain 50 can be directly or indirectly regulated by the regulation mechanism 6. In the chain 50, the connecting portion 41 of the support plate 4 is provided at the portion 50a located on the inner side with the sprocket wheels 51, 52 interposed therebetween, and the portion 50 located on the outer side.
The balance weight 5 for urging the support plate 4 upward in b
7 are connected to each other. The load of the balance weight 57 is set in consideration of the weights of the support plate 4, the wheeled pallet 2 and the container 10.

Upper and lower sprocket wheels 51, 52
Are mounted on support shafts 53 and 54 provided at the upper and lower ends of the side wall 33. Upper support shaft 53
4, is horizontally supported by a plurality of bearings 55, and has a handle 38 for rotating operation at one end.
However, the sprocket wheels 51 are attached to the other end portions, and the brake drum 61 that constitutes the braking mechanism 60 is attached to the intermediate portion.

The braking mechanism 60 includes the braking lever 37.
Is used to tighten the outer peripheral surface of the brake drum 61 by the brake shoe 62 to restrict the rotation of the support shaft 53, and together with the first and second positioning mechanisms 7 and 8 described later, the restriction is performed. The mechanism 6 is configured.

FIG. 5 shows the structure of the braking mechanism 60. In the figure, 61 is a brake drum and 62 is a brake shoe. One end of the brake shoe 62 is fixed, and the other end is connected to one end of a wire 64 via an L-shaped lever 63. The other end of the wire 64 is connected to one end of a return spring 65, and the other end of the return spring 65 is connected to one end of a wire 67 via a latch mechanism 66. The other end of the wire 67 is connected to the braking lever 37.

When the braking lever 37 is pulled, the L-shaped lever 63 is pulled by the wires 67 and 64, so that the L-shaped lever 63 rotates about the fulcrum portion 63a. As a result, the brake shoe 62 is pulled, the outer peripheral surface of the brake drum 61 is tightened, and the braking force acts on the support shaft 53. When the wire 67 is pulled, the latch mechanism 66 performs a latching operation, and the control lever 37
The braking state is maintained even when is released. Next, when the braking lever 37 is pulled again, the latch mechanism 66 is returned, and the L-type lever 63 is rotated in the opposite direction about the fulcrum 63a by the action of the return spring 65. as a result,
The tightening force on the brake drum 61 by the brake shoe 62 is released, and the braking force on the support shaft 53 is released.

As shown in FIG. 3, the above-mentioned first positioning mechanism 7 has a pair of upper and lower stoppers 71, 7 provided at the upper and lower ends of the left and right guide rails 56, respectively.
It is composed of two. These stoppers 71,
When the guide roller 42 collides against 72, the ascent and descent of the support plate 4 is restricted.

The guide roller 42 has a stopper 72 at the bottom.
The support plate 4 is located below the support substrate 20 of the pallet 2 with wheels on the ground when it abuts against
It is possible to introduce the wheeled pallet 2 onto the support plate 4 by manually pushing the wheeled pallet 2.
Hereinafter, this position is referred to as a "first work position". Support plate 4
Is positioned at the first working position by the lower stopper 72 and the second positioning mechanism 8 described later.

The guide roller 42 has a stopper 71 on the upper side.
The support plate 4 is located substantially at the center of the height of the hand truck 3 when the hand truck 3 is in contact with the hand truck 3. When the container 10 for picking work is supporting the wheeled pallet 2 on which the picking work container 10 is stacked on the support plate 4, the worker M has an optimum height for putting picked articles into the container 10. Become. Hereinafter, this position is referred to as a "second work position". The support plate 4 is provided with a second stopper by the upper stopper 71 and the braking mechanism 60 described above.
Position it at the work position.

As shown in FIG. 6, the second positioning mechanism 8 is provided on the support shaft 54 on which the lower sprocket wheel 52 is mounted, and the lock rod 80 is projected so that the lower surface of the support plate 4 or By engaging with the locking hole 43 formed in the back plate 40 of the support plate 4, the up-and-down movement of the support plate 4 is regulated. The second positioning mechanism 8 includes the support shaft 54.
A rotary plate 81 is attached to the lock plate 80, and one end of the lock rod 80 is supported by the rotary plate 81, so that the lock rod 80 can be reciprocated according to the forward and reverse rotation of the rotary plate 81. is there. The rotating plate 81 is provided with a spring 82 and a lock rod 80.
Is urged in the protruding direction. The rotary plate 81 has a pedal 8
3 is projected, and the rotating plate 81
Is rotated and the lock rod 80 is retracted.

The tip of the lock rod 80 is the back plate 40 of the support plate 4.
When the support plate 4 is in the first working position described above when it is engaged with the locking hole 43 formed in the pallet 2 with wheels.
Can be led in and out of the support plate 4.

In the state shown in FIG. 6 in which the lock bar 80 is engaged with the lower surface of the support plate 4, the support plate 4 is positioned higher than the first working position but lower than the second working position. When the picking work container 10 is supporting the wheeled pallet 2 in which two picking containers 10 are stacked on the support plate 4, the worker M
Is an optimum height for putting picked articles into the upper container 10. Hereinafter, this position will be referred to as the "third working position".
Say.

Next, the operation of the picking work support apparatus 1 according to the first embodiment described above will be described with reference to FIGS. 7 and 8. First, prior to the picking operation, the handle 38 for rotating operation is operated to lower the chain 50 of the lifting mechanism 5 to lower the support plate 4. When the lowering of the support plate 4 is restricted by the stopper 72 of the first positioning mechanism 7, that is, when the support plate 4 reaches the first working position, the lock rod 80 of the second positioning mechanism 8 is moved to the support plate. The support plate 4 is positioned at the first working position by engaging with the locking holes 43 formed in the back plate 40 of FIG.
(1)). In this state, the wheeled pallet 2 on which the two containers 10 for picking work are placed is manually pushed and introduced onto the support plate 4.

Next, when the restraint of the support plate 4 by the lock rod 80 of the second positioning mechanism 8 is released, the chain 50 of the lifting mechanism 5 is lifted by the load of the balance weight 57, and the support plate 4 is lifted. When the support plate 4 is restricted from rising by the stopper 71 of the first positioning mechanism 7,
That is, when the support plate 4 reaches the second work position, the brake lever 37 is operated to cause the brake mechanism 60 to move the support shaft 53.
By restricting the rotation of the support plate 4, the support plate 4 is localized at the second work position (FIG. 7 (2)). In this state, picking work is performed, and the worker M moves the hand cart 3 to the storage shelf 9
A predetermined number of required articles are taken out from the storage box 90 while being moved along, and the picked articles are put into the two containers 10.

When the two containers 10 are full,
By operating the braking lever 37, the support shaft 5 by the braking mechanism 60
When the restraint of 3 is released, the load on the support plate 4 side is larger than the load of the balance weight 57, so the chain 50 of the lifting mechanism 5 moves down and the support plate 4 moves down. When the support plate 4 hits the lock rod 80 of the second positioning mechanism 8 and its lowering is restricted, the support plate 4 is positioned at the third work position and is localized at the third work position (FIG. 7 (3)). . In this state, the empty containers 10 are stacked on the respective containers 10 in the full state, and then the picking work is performed while moving the hand truck 3.

When the picking operation is completed, the pedal 83 is stepped on to retract the lock rod 80 of the second positioning mechanism 8 to release the restraint of the support plate 4 by the lock rod 80 (FIG. 8 (1)). As a result, the load on the support plate 4 side is greater than the load on the balance weight 57, so the chain 50 of the lifting mechanism 5 moves down and the support plate 4 moves down. Support plate 4
When the lowering is restricted by the stopper 72 of the first positioning mechanism 7, that is, when the support plate 4 reaches the first working position, the lock rod 80 of the second positioning mechanism 8 is moved to the back of the support plate 4. The supporting plate 4 is positioned at the first working position by engaging with the locking hole 43 formed in the plate 40 (FIG. 8 (2)). In this state, the four pallets with wheels 10 are pushed by hand with the four containers 10 for picking work placed on the pallet 2 and pulled out from the support plate 4 (FIG. 8 (3)).

FIG. 9 shows a picking work support apparatus 1 according to the second embodiment of the present invention. This picking work support device 1 is, like the first embodiment, a wheeled pallet 2 on which a plurality of picking work containers 10 can be stacked.
And a hand truck 3 on which the wheeled pallet 2 can be placed in a state where a plurality of containers 10 are stacked. As shown in FIG. 10, the wheeled pallet 2 has free wheels 21 attached to the lower surface of the support substrate 20 at four corner positions. The upper surface of the support substrate 20 is large enough to stack two box-shaped containers 10 for picking work side by side.

The container 10 is made of synthetic resin and has an open upper surface, and the same container 10 can be stacked on the open surface. The container 10 can be assembled and disassembled, and the disassembled container 10 can be held one by one by the holding frames 303 provided on both sides of the hand truck 3.

The body 300 of the hand truck 3 is shown in FIGS.
2, a pair of left and right support frames 301, 30
The main body frame 302 is assembled between the two. Each of the left and right support frames 301 is formed by bending a metal pipe and has a horizontal portion 301a and a vertical portion 301b. An upper end of the vertical portion 301b is bent rearward to form a handle 301c for a manual pushing operation. Wheels 304 are attached to the front end of the horizontal portion 301 a of each support frame 301 and to both sides of the lower end of the main body frame 302. The central portion of the length of the horizontal portion 301a is curved so as to project upward, and the holding frame 3 is attached to the curved portion.
03 is attached so that the disassembled container 10 can be held. The body frame 302 includes a lower frame 30.
The left and right side frames 302b and 302b are vertically provided on the 2c, and the operation table 302a is attached between the upper ends thereof. A braking lever 601 and a position adjusting lever 508 described later are arranged on the upper surface of the operation table 302a.

On the front surface of the body frame 302, a horizontal support plate 4 is supported so as to be able to move up and down. This support plate 4
Has a configuration similar to that of the first embodiment, and includes a pair of support surfaces 4a and 4b with an open portion 4c at the center of the width interposed therebetween. The tip of the support plate 4 is open so that the wheeled pallet 2 can be carried in and out. The distance w between the horizontal portions 301a and 301a of the left and right support frames 301 is larger than the width D of the support substrate 20 of the wheeled pallet 2. The width d of the support plate 4 is smaller than the distance t between the free wheels 21, 21 of the wheeled pallet 2. With such a dimension setting, the wheeled pallet 2 can be supported on the support plate 4 while straddling the support plate 4.

The support plate 4 is supported by an elevating mechanism 5 capable of elevating and lowering so that the pallet 2 with wheels can be moved in and out of the support plate 4. An upward back plate 40 is formed at the base end portion of the support plate 4, and on the back surface of the back plate 40, a connecting portion 45 is provided at approximately the center of the height, and at both positions of the upper end portion and the lower end portion. Guide rollers 44, 44 are provided respectively. The connecting portion 45
One end of a wire 500 of the lifting mechanism 5 is connected to the. Each guide roller 44 is slidably supported by guide rails 59 provided on both sides of the body frame 302.

The lifting mechanism 5 is shown in FIGS.
As shown in FIG. 16, a pressure tank 501 set to a predetermined air pressure and a cylinder mechanism 503 in which a piston rod 502 operates by receiving the air pressure of the pressure tank 501.
And a pull-up mechanism 504 that pulls up the support plate 4 by upwardly applying a force applied to the piston of the cylinder mechanism 503 to the support plate 4, and a load including the support plate 4 is applied to the piston. Support plate 4 when the force is smaller than
Rises and the support plate 4 descends when the load including the support plate 4 is larger than the force applied to the piston. The air pressure of the pressure tank 501 is set in consideration of the respective loads of the support plate 4, the wheeled pallet 2 and the container 10.

The pulling mechanism 504 of this embodiment is constituted by the wire 500 suspended from the pulley 505 supported on the lower surface of the operation table 302a, but a chain or the like may be used instead of the wire 500. .
Further, it goes without saying that the pulling mechanism 504 is not limited to that of this embodiment.

The cylinder mechanism 503 is supported on the lower surface of the operation table 302a with the piston rod 502 facing downward. A pair of moving pulleys 506 and 506 are attached to the lower end of the piston rod 502. One end of the wire 500 is connected to the connecting portion 45 of the support plate 4, and the other end of the wire 500 is the piston rod 50.
It is connected to the position adjusting mechanism 507 of the support plate 4 via two movable pulleys 506 and 506 supported at the tip of the second plate 2. The support plate 4 is pulled upward by the wire 500 when the piston rod 502 projects.

The position adjusting mechanism 507 is for slightly displacing the support plate 4 in the vertical direction when the wheeled pallet 2 supported on the support plate 4 is landed. The upper surface contacts or separates from the lower surface of the support substrate 20 of the wheeled pallet 2. FIG.
Shows an example of the configuration of the position adjusting mechanism 507. The position adjusting lever 508 is supported on the operation table 302a so that it can be raised and lowered, and the guide shaft 509 supported on the lower end portion according to the raising and lowering operation of the position adjusting lever 508. The guide groove 512
And a displacement plate 510 for vertically displacing the same.
The other end of the wire 500 is connected to the guide shaft 509. The guide groove 512 is provided on the operation table 302a.
When the guide shaft 509 is vertically displaced along the guide groove 512, the wire 500 is pulled or loosened so that the support plate 4 moves in the vertical direction. Is displaced to.

The pressure tank 501 is filled with an appropriate amount of hydraulic oil, and the hydraulic oil is introduced into the cylinder chamber of the cylinder mechanism 503 through a connecting pipe 513 connected to the bottom of the pressure tank 501. . Pressure tank 50
The air pressure of 1 acts on the piston of the cylinder mechanism 503 via the hydraulic oil.

A brake lever 60 is attached to the connecting pipe 513.
A valve mechanism 600 that opens and closes by the turning operation of 1 is interposed. When the brake lever 601 is rotated to open the valve mechanism 600, and if the force applied to the piston of the cylinder mechanism 503 is larger than the load including the support plate 4, the piston rod 502 is caused to project and the support plate 4 is pulled up. If the load including the support plate 4 becomes larger than the force applied to the piston, the piston rod 502 retracts and the support plate 4 descends. The valve mechanism 600 including the braking lever 601 also serves as the braking mechanism 60. When the braking lever 601 is rotated to close the valve mechanism 600, the load including the support plate 4 is supported and the support plate 4 is optional. Localize at the height of.

A stopper 74 which constitutes a positioning mechanism 73 is attached to the upper ends of the left and right guide rails 59. When the guide roller 44 collides with the stopper 74, the support plate 4 stops rising. The support plate 4 descends integrally with the wheeled pallet 2 and stops lowering of the support plate 4 when the wheels 21 of the wheeled pallet 2 land. In this embodiment, a stopper at the lower end is provided. Has not been done.

When the wheels 21 of the wheeled pallet 2 are in the landing state, the support plate 4 is in contact with the lower surface of the support substrate 20 of the wheeled pallet 2 and receives a load.
Since the support plate 4 is separated from the support substrate 20 of the wheeled pallet 2 by tilting the position adjusting lever 508 of, the wheeled pallet 2 is manually pushed in and out of the support plate 4. Is possible. This position is the "first work position".

The guide roller 44 has the stopper 7 at the upper end.
4, when the support plate 4 is in a state of hitting the
Located almost at the center of height. A pallet with wheels 2 in which one container 10 for picking work is stacked on this support plate 4
In a state where the worker M is supporting, the worker M has an optimum height for putting the picked article into the container 10. This position is the "second work position". The support plate 4 is localized at the “first work position” or the “second work position” by the stopper 74 and the braking mechanism 60.

Next, the operation of the picking work support apparatus 1 of the second embodiment will be described with reference to FIGS. 14 to 16. First, prior to the picking work, the braking lever 60
1 is set to a state where the braking is released, and a pulling force is forcibly applied to the wire 500 of the lifting mechanism 5 to support the support plate 4
To lower. When the support plate 4 reaches the lowermost end, the braking lever 601 is turned to set the braking state. Next, the position adjusting lever 508 is tilted to displace the support plate 4 slightly downward, and the support plate 4 is localized at the “first working position”. In this state, the wheeled pallet 2 on which the two containers 10 for picking work are placed is manually pushed and introduced onto the support plate 4 (FIG. 14 (1)). After that, the position adjusting lever 508 is operated to stand up to displace the support plate 4 upward and bring it into contact with the lower surface of the support substrate 20 of the wheeled pallet 2 to support the load (FIG. 14 (2)).

Next, when the brake lever 601 is turned to set the brake release state, that is, the valve mechanism 600 is opened, the working oil is introduced into the cylinder chamber 503 by the air pressure of the pressure tank 501. The piston is pushed down. This allows the piston rod 502
Pulls out the wire 500 as a result of the protruding motion, and as a result,
The support plate 4 is pulled up and rises (FIG. 15 (1)).

When the support plate 4 is restricted from rising by the stopper 74, that is, when the support plate 4 reaches the "second working position", the braking lever 601 is rotated to set the braking state. In the braking state, the valve mechanism 600 is closed and the working oil is confined in the cylinder chamber of the cylinder mechanism 503. Therefore, even if the load including the support plate 4 increases, the cylinder rod 502 does not retract, and the support plate 4 does not move. "Second
Working position "(Fig. 15 (2)). In this state, the picking operation is performed. The worker M takes out the required number of predetermined articles from the storage box 90 while moving the hand cart 3 along the storage rack 9 and picks them into the two containers 10. Put in the items you made.

When the two containers 10 are full,
When the brake lever 601 is turned to set the brake release state, the load including the support plate 4 is larger than the force applied to the piston of the cylinder mechanism 503, so the wire 500 is pulled by the load and the support plate 4 descends ( FIG.
(1)). When the support plate 4 reaches the lowermost end, the braking lever 601 is turned to set the braking state, and the empty containers 10 are stacked on the respective containers 10 in the full state, and then the hand cart 3 is moved. While performing picking work (Fig. 16
(2)). The position of the support plate 4 is the "third working position".

When the picking work is finished, the support plate 4 is slightly displaced downward by tilting the position adjusting lever 508 so that the support plate 4 is separated from the lower surface of the support substrate 20 of the wheeled pallet 2, and the support plate 4 is moved to the "first" position. The work position.
In this state, the four pallets for picking work 10 are placed on the supporting plate 4 by pushing the pallet 2 with wheels by hand with four containers 10 for picking work placed on the pallet.
The individually mounted wheeled pallet 2 is manually pushed and introduced onto the support plate 4.

[0065]

According to the present invention, a worker can perform a predetermined work at an optimum height, so that the physical pain associated with the work is reduced and the working condition is improved. Further, since the loading and unloading of the articles on the hand truck can be performed by using the pallet with wheels, the loading and unloading of the articles can be facilitated and the fatigue of the operator can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a situation in which a picking work is being performed by a picking work support device according to a first embodiment of the present invention.

FIG. 2 is a plan view of the hand truck according to the first embodiment of the present invention.

FIG. 3 is a front view in which a part of the hand truck is cut away.

FIG. 4 is a plan view showing a configuration of an upper support shaft and a configuration of a braking mechanism.

FIG. 5 is a perspective view showing a configuration of a braking mechanism.

FIG. 6 is an enlarged front view showing the configuration of a second positioning mechanism.

FIG. 7 is an explanatory diagram showing a procedure of a picking operation.

FIG. 8 is an explanatory diagram showing a procedure of a picking operation.

FIG. 9 is a perspective view showing a picking work support device according to a second embodiment of the present invention.

FIG. 10 is a plan view of a hand truck according to a second embodiment of the present invention.

FIG. 11 is a side view of the hand truck according to the second embodiment.

FIG. 12 is a front view of a hand truck according to a second embodiment.

FIG. 13 is a side view showing the configuration of the position adjusting mechanism.

FIG. 14 is an explanatory diagram showing a procedure of a picking operation.

FIG. 15 is an explanatory diagram showing a procedure of a picking operation.

FIG. 16 is an explanatory diagram showing a procedure of a picking operation.

FIG. 17 is a perspective view showing an appearance of a conventional hand truck.

[Explanation of symbols]

1 Picking support device 2 wheeled pallets 3 hand carts 4 Support plate 5 Lifting mechanism 7 First positioning mechanism 8 Second positioning mechanism 10 Picking containers 34 wheels 50 chains 51,52 sprocket wheel 57 Balance weight 58 Lifting mechanism 60 braking mechanism 500 wire 501 pressure tank 502 piston rod 503 Cylinder mechanism 504 Lifting mechanism 505 pulley

Claims (8)

[Claims] 1. A hand truck that has wheels on its lower surface and can be manually pushed, and has a horizontal support plate, wherein the support plate is
A hand truck that is supported by a lifting mechanism that can move up and down. 2. A hand truck having a wheel on the lower surface thereof and capable of being manually pushed, and having a horizontal support plate having a free end portion and having a width narrower than a wheel interval of a wheeled pallet, The plate is a hand truck that is supported by an elevating mechanism capable of elevating and lowering so that the plate can be lowered to a position where the pallet with wheels can be inserted and removed from the support plate. 3. The hand truck according to claim 1, wherein the elevating mechanism acts upwardly on a balance weight having a predetermined load and a force due to the load of the balance weight on a support plate. And a lifting mechanism for pulling up the support plate, and when the load including the support plate is smaller than the load of the balance weight, the support plate rises, and when the load including the support plate is larger than the load of the balance weight, the support plate is A hand truck that is designed to descend. 4. The pulling mechanism is an endless chain stretched between upper and lower wheels, and a proximal end portion of a support plate is connected to an inner portion of the chain with the wheel interposed therebetween.
The hand truck according to claim 3, wherein a balance weight is connected to an outer portion. 5. The hand truck according to claim 1, wherein the lifting mechanism has a pressure tank set to a predetermined air pressure, and a cylinder mechanism in which a piston operates in response to the air pressure of the pressure tank. And a pull-up mechanism for pulling up the support plate by upwardly applying the force applied to the piston of the cylinder mechanism to the support plate, and the load including the support plate is smaller than the force applied to the piston. When the support plate rises at this time, and the support plate moves downward when the load including the support plate is larger than the force applied to the piston. 6. The pulling mechanism is a wire suspended on a pulley, one end of the wire is connected to a base end of a support plate, and the other end of the wire is connected to a tip of a piston rod. The hand truck according to claim 5, which is provided. 7. The hand truck according to claim 1, wherein the lifting mechanism has at least a wheeled pallet on which a container for picking work can be loaded on a support plate. A hand pusher equipped with a mechanism capable of orienting the support plate at a first work position for inserting and removing the picked-up article into the container and a second work position for performing a work for putting the picked article into the container. Dolly. 8. A picking work support device comprising a wheeled pallet capable of stacking containers for picking work and a hand cart having a wheel on its lower surface and capable of being manually pushed. Has a horizontal support plate whose tip is released and has a width narrower than the wheel gap of the wheeled pallet, and the support plate descends to a position on the support plate where the wheeled pallet can be inserted and removed. Is supported by an elevating mechanism capable of elevating and lowering, and the elevating mechanism is configured to at least move a pallet with wheels loaded with the containers into and out of a support plate. A picking work support device comprising a mechanism capable of orienting a support plate at one work position and a second work position for carrying out a work for putting picked articles into the container.