JP2002266577A - Footstool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a footstool which can be moored to a target parcel rack in the course of movement toward the parcel rack, can continuously maintain a fixed or moored state thereof during execution of work, and can cancel the moored state by simple operation after execution of the work. SOLUTION: The footstool is formed of a footstool main body 11 and a mooring device. The footstool main body 11 includes a suitable number of footboards 6a, 6b, 6c, and caster wheels 7a, 7b for movement. The mooring device is arranged on a side facing the parcel rack, for mooring the footstool and canceling the mooring.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a platform and, more particularly, to a device for fixing a platform when loading or unloading a load from a shelf.

[0002]

2. Description of the Related Art Conventionally, a step provided with two or three steps of a step board has been made movable by a caster wheel, and when a worker gets on the caster wheel, the caster wheel is sunk into the lower end face of the step board. The lower end surface (usually the lower end of the leg) abuts directly on the floor surface, making it impossible to move with the caster wheels from that point on, and the step ladder is fixed in place, enabling stable work. Were proposed and implemented.

[0003] However, in such a conventional stepping platform, if the weight shifts due to the act of taking the luggage at the back of the shelf or the like, the force for pushing down the stepping platform decreases.
The caster wheel is pushed out by the biasing force of the elastic member,
As a result, the lower end surface of the step rises from the floor surface, and the caster wheel allows the step to move in a free direction, so that weight cannot be transferred on the table for safety.

[0004] A technique that does not include caster wheels but stabilizes the position of a stepping board with respect to a load shelf to enable safe cargo handling work has been proposed as disclosed in Japanese Patent Application Laid-Open No. 11-71980. I have. It's on the platform
A stopper piece that engages a part of furniture such as a system kitchen is provided to prevent wobble and fall of the step ladder because the stopper piece is merely in contact with the furniture. However, the platform could not be prevented from moving away from the furniture.

[0005]

As described above, in any of the prior arts, there is a possibility that the step ladder starts to move in a free direction due to the weight shift of the worker during the cargo handling operation. They had to do a lot of troublesome work with care.

The present invention has been made in view of the drawbacks of the prior art described above, and its purpose is to continue the action of moving toward the target cargo rack, An object of the present invention is to provide a step platform that is capable of mooring a step platform, maintaining a fixed state of the step platform continuously during work, and then releasing the mooring state by a simple operation.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, a stepping board main body provided with a suitable number of steps of a stepping plate and a caster wheel for movement, and a facing of a load shelf. And a mooring device provided on the side and capable of mooring / releasing the shelf bar.

According to the present invention, the step slidable by the caster wheels can be fixed at a fixed position during the cargo handling operation.

According to a second aspect of the present invention, in the first aspect of the present invention, the caster wheel is disposed so as to be able to protrude and retract from the lower end surface of the step platform body, and is normally urged downwardly. It was made.

According to the present invention, at the working position, the lower end surface of the step platform body comes into direct contact with the floor surface, so that the operation of fixing the step platform is performed more reliably.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the mooring device is attached to the turning shaft rotatably mounted on the stepping board main body and to the turning shaft. And a handle connected to the rotating shaft via a link and rotating the rotating shaft to act in a direction to release the mooring state of the mooring member.

According to the present invention, it is possible to easily release the mooring state of the mooring member, that is, release the fixed state of the step platform, simply by one-touch operation of the handle.

According to the fourth aspect of the present invention, the first to third aspects are provided.
In the invention according to any one of the above, the mooring device may be provided with a rotating shaft horizontally rotatably mounted on the stepping body, a mooring member attached to the rotating shaft, and attaching the mooring member in a mooring direction. A biasing elastic member, and a handle connected to the rotating shaft via a link to rotate the rotating shaft against the urging force of the elastic member to act in a direction to release the mooring state of the mooring member. It is composed of:

According to the present invention, in addition to the function of the invention described in any one of the first to third aspects, further, the urging of the mooring member in the mooring direction can be performed more reliably by the function of the elastic member. It is something to be done.

According to a fifth aspect of the present invention, in the third or fourth aspect of the present invention, the mooring member has a slope formed at an end thereof, which can be in contact with the shelf bar, and a mooring holding surface formed at a rear surface thereof. .

According to the present invention, the step is moved to bring the slope of the end of the mooring member into contact with the shelf bar and further moved forward, so that the top of the tip of the mooring member gets over the shelf bar and the mooring state is achieved. You.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION
This will be described in detail with reference to the drawings. In FIGS. 1 and 2, a pair of left and right frames 2 of a modified inverted U-shape, connecting members 3 a, 3 b, 3 c, 3 d for connecting between the right and left frames 2, and a tension inside each frame 2. The basic frame 5 is formed by the beam members 4a, 4b, 4c, and 4d thus formed. Only the lowermost connecting member 3d is connected between the left and right beam members 4d.

Between the left and right beam members 4a, 4b, 4c,
Step plates 6a, 6b, 6c are erected. A pair of caster wheels 7a and 7b are respectively provided on the lower left and right beam members 4d.
Is installed. The caster wheels 7a, 7b have their mounting shafts 8a, 8b slidable with respect to the beam 4d, and are always projected in the protruding direction by the springs 9a, 9b, that is, the lower end surface of the platform 1 (frame 2). (A plane including the four lower ends). In addition, covers 10a and 10b are attached to each lower end of the frame 2 to secure a frictional force with the floor surface and to reduce impact. The step body 11 is constituted by the contents described so far.

Next, the mooring device will be described. On the lower surface of the connecting member 3d, a rotating shaft 13 is horizontally supported by a bearing 12 so as to be rotatable. An anchoring member 14 is attached to a substantially central portion of the rotating shaft 13. The mooring member 14
Is made of a plate-like material, and a slope 16 is formed at the front end thereof, which can contact the lower edge of the shelf bar 15 of the load shelf, and a vertical mooring holding surface 17 is formed at the rear rear surface. See also). A torsion coil spring 18 is disposed in the bearing 12 on one side,
The tip of the mooring member 14 is constantly urged to rotate upward by the elastic force of the torsion coil spring 18. A stopper 19 for regulating the upward rotation of the mooring member 14 is attached to the connecting member 3d.

Further, from the uppermost beam member 4a, the support member 20 is formed.
Is suspended, and a lever 2 is provided at the lower end thereof through a pin 21.
2 is supported so as to be vertically rotatable. This side of the lever 22 (when the operator steps on the step plates 6c, 6b, 6a,
A handle 23 is attached to an end portion of the vehicle, and the other end is connected to a vertically arranged link 25 via a pin 24. A tension coil spring 26 is stretched between the lever 22 and the beam member 4a near the handle 23 to urge the handle 23 side upward. A bracket 27 is fixedly attached to the end of the rotating shaft 13.
Is connected to the link 25 via a pin 28.

Next, the operation of the above embodiment will be described. When the worker is not on the step 1, the caster wheels 7a, 7b are in a state of being fully extended by the urging force of the springs 9a, 9b, and therefore, the lower end of the frame 2 is in a state of floating from the floor surface, Running on the wheels 7a and 7b becomes possible. An operator grasps the vicinity of the top of the frame 2 of the stepping platform 1 in this state by hand and moves the stepping platform 1 to a target cargo rack.

Thereafter, the step plates 6a, 6b,
The side opposite to the 6c side is advanced in the direction of arrow F (see FIG. 3) so as to face the cargo rack. Eventually, the slope 16 at the distal end of the mooring member 14 comes into contact with the lower edge of the shelf bar 15, and the lower edge of the shelf bar 15 slides on the slope 16 while resisting the urging force of the torsion coil spring 18 and the extension coil spring 26. do it,
The mooring member 14 is turned downward about the turning shaft 13 (see the state A in FIG. 3). When the forward movement in the direction of the arrow F is further continued, the restraining force from above is lost when the lower edge of the shelf bar 15 exceeds the vertex of the slope 16, so that the urging force of the torsion coil spring 18 and the extension coil spring 26 is applied. As a result, the mooring member 14 rotates upward about the rotating shaft 13, and the mooring holding surface 17 is moored on the back side surface of the lower edge of the shelf bar 15 (see state B in FIG. 3). By achieving this mooring state, the step 1 is firmly fixed in a fixed position beside the load shelf.

Thereafter, when the worker steps on the tread plates 6c, 6b and 6a and climbs on the step 1, the spring 9 is moved by the weight of the worker.
The step 1 is pushed down against the urging forces of a and 9b, and the lower end of the frame 2 directly abuts on the floor surface, so that a more stable state is obtained.
At this time, the covers 10a and 10b alleviate the impact at the time of contact with the floor, prevent the floor from being damaged, increase the frictional force between the floor and the floor, and fix the step 1. Make the state more robust.

In this state, depending on the work content,
As a result of the weight shift, the force for pushing down the platform 1 decreases, and the caster wheels 7a and 7b protrude downward from the lower end surface of the platform 1 so that the lower end of the frame 2 floats from the floor. Since the mooring member 14 is properly moored to the shelf bar 15, the step 1 does not start moving away from the load rack without permission, and safe cargo handling can be continued.

When the worker gets off the platform 1 after the cargo handling operation is completed, the force pressing the platform 1 downward is removed, and the caster wheels 7a, 7b are biased by the springs 9a, 9b.
7b protrudes downward, and the lower end of the frame 2 is in a floating state. Next, if the operator grasps the handle 23 and pushes down, the rotating shaft 13 is rotated clockwise in FIGS. 1 and 3 via the link 25 and the bracket 27,
As a result, the distal end of the mooring member 14 rotates downward.

As a result, the mooring holding surface 17 comes off below the lower edge of the shelf bar 15, and the mooring state of the shelf bar 15 by the mooring member 14 is released. After this, the operator can handle 2
By pulling out the platform 1 in a direction away from the load shelf while pressing down 3, the fixed position of the platform 1 with respect to the load shelf is released, and the travel of the platform 1 to another place becomes free.

The effects that can be expected from the above embodiment will be described below. (A) Since the step 1 can be moored to the load shelves during the cargo handling work, the cargo handling work that is safe for the worker becomes possible. (B) Since the mooring of the platform 1 to the cargo rack is automatically performed as a continuation of the moving operation of the platform 1, the mooring can be reliably performed without any trouble for the operator. (C) The mooring state of the step 1 to the load shelf can be released with a single touch by simply pushing down the handle 23 and pulling the handle 23 toward the user, thereby enabling quick work.

The present invention is not limited to the above embodiment, but can be implemented as follows. ○ In the above embodiment, the caster wheel was made to be able to protrude from the lower end surface of the stepping wheel.However, the embodiment can be carried out in a mode in which the stepping wheel itself is always supported by the caster wheel while the caster wheel is projected downward. It is. In the above embodiment, the mooring member is moored from below to the lower edge of the shelf bar, but may be moored to the upper edge of the shelf bar from above, or Implementation is possible even when mooring from the side with respect to the column of the shelf. In the above embodiment, the mooring member 14 is always urged in the mooring direction by the torsion coil spring 18 which is an elastic member. However, the torsion coil spring 18 is omitted, and only the urging force by the elastic force of the extension coil spring 26 is used. The present invention can also be implemented by omitting the extension coil spring 26 and using the gravity acting on the link 25 itself as the urging force of the mooring member 14 in the mooring direction. is there. Further, the connecting portion of the link 25 (pin 2
4, at least one of the support portion of the handle 22 (the portion of the pin 21), the support portion of the handle 22 (the portion of the pin 21), and at least one portion of the bearing 12 of the rotating shaft 13, apply frictional resistance appropriately and move the handle 23 with the handle 23. If it is possible to hold the position each time, the mooring state can be achieved by rotating the handle 23 up and down, and the mooring state can be released by rotating the handle 23 up and down. .

[0029]

As described above, according to the present invention, the step can be moored to the shelves during the cargo handling operation, so that a safe cargo handling operation can be performed.
This has a remarkable effect that the release can be reliably performed by a simple operation.

[Brief description of the drawings]

FIG. 1 is a front view showing the entire apparatus of the present invention.

FIG. 2 is a side view showing the entire apparatus of the present invention.

FIG. 3 is an enlarged front view showing a main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Step platform 2 Frame body 3a, 3b, 3c, 3d Connecting material 4a, 4b, 4c, 4d Beam material 6a, 6b, 6c Tread plate 7a, 7b Caster wheel 11 Step platform main body 13 Rotating shaft 14 Mooring member 15 Shelf 16 Slope 17 Mooring holding surface 23 Handle

Claims (5)

[Claims] 1. A step platform body provided with a suitable number of steps of treads and caster wheels for movement, and a mooring device provided on a side facing a load shelf and capable of mooring / releasing to a shelf bar. A featured platform. 2. The step ladder according to claim 1, wherein the caster wheel is disposed so as to be able to protrude and retract from a lower end surface of the step pedestal main body and is normally urged in a downward projecting direction. 3. The mooring device is connected to the turning shaft via a link, a turning shaft rotatably mounted on the stepping body, a mooring member attached to the turning shaft, and a link. The step stool according to claim 1, further comprising a handle that rotates the rotation shaft and acts in a direction to release the mooring state of the mooring member. 4. 4. The mooring device according to claim 1, wherein the mooring device includes a rotating shaft rotatably mounted on the platform, a mooring member attached to the rotating shaft, and an elastic member for urging the mooring member in a mooring direction. And a handle connected to the rotating shaft via a link and rotating the rotating shaft against the urging force of the elastic member to act in a direction to release the mooring state of the mooring member. The step stool according to claim 1, wherein: 5. The step platform according to claim 3, wherein a mooring holding surface is formed at a front end of the mooring member and a slope which can be brought into contact with the shelf bar and a rear surface thereof.