JP3152577B2 - Retractable staircase - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a staircase which is used as a spectator stand by installing a chorus table, a group photographing table, or a chair.

[0002]

2. Description of the Related Art Conventionally, stowable staircases are of a folding type, but they are fixed to the front and rear after assembling at each step, so that assembling and storing are troublesome. Was.

[0003]

SUMMARY OF THE INVENTION Therefore, according to the present invention, the stairs can be stored under the highest step, and the steps can be formed by extending in a drawer-type manner. It provides a simple staircase. It is also intended to be used as a staircase going up to the stage in preparation for the front of the stage.

[0004]

Means for Solving the Problems The present invention for this purpose is, stacked
Multiple placed stages can be pulled out or pushed in sequentially
A staircase that is freely linked,
Connect to the front end of the stage, and to other steps
In the rear, a foot with wheels that touches the ground on the installation surface is installed.
In the lowermost step, rolling elements that roll on the installation surface
For other steps, roll on the base plate on which the top step is placed
Rolling elements are provided, and the bottom step is stored (press
Re) Bei and backward moving device for moving in a direction, a forward movement mechanism for moving the stage base at the bottom in the extended (drawer) direction
I have. The reversing device should be connected to the lowermost platform.
Ear and wire winding drum installed on the highest stage
It is composed of In addition, the forward movement mechanism is flexible
The pair of arms connected to the
Arrange the arm so that it corresponds to the extending or pushing direction.
Each end of the upper and lower steps.
A delay to the sprocket wheel provided on the bending portion of the over-time
With the end of the chain on each arm.
It is connected to Ilspring.

[0005]

[Function] In the storage state, under the highest stage, the legs at the rear of each stage are in contact with the ground, and the next highest stage is sequentially placed on the lowest stage to be stacked. And each stage
The inside is concealed by a riser provided on the front of the platform.
When the lower stage is pulled out from this storage state, the higher stage stacked on it is linked with the highest stage that is stopped, and stops at a predetermined drawer. When you pull out, the high step stacked on it repeats stopping at a predetermined drawer by linking the higher step that stopped, and finally only the bottom step is pulled out and becomes a step shape is there. During this movement, even stage stand stacked state, Bei the stage stand on each
Rolling element rolls on the base plate of the lower stage and stacks
In addition, since the respective steps are supported by the wheels of the rear leg members in contact with the ground , they can move forward smoothly and with a light force.

When retracting from the extended state, when the lowermost step is first retracted, the step is located below the next higher step and the step is placed. When the lowermost stage is retreated further while the stage is being placed, the stage placed is positioned under the next higher stage, and the stage is placed. They are stacked and stored under the highest step. At this time, the rolling elements provided on the upper step roll on the lower plate of the lower step and are stacked, and each step is supported by being grounded by the wheel of the rear leg material. Because of this, you can retreat smoothly and with a light force.

Further, by Rukoto preparative winding a wire coupled to stage stand bottom drum motor drive, provided with a backward moving device for moving the stage table in the storage (closet) direction, the chain that tandem to the coil spring Sprocket ho
Engage the eel by, pivotally connected to a stage base of the highest portion及 beauty bottom
Attached to a pair of flexible arms
With the restoring force of the more compressed coil spring, the lowermost stage
By providing a forward movement mechanism that moves the lowermost stage in the extension direction by urging in the extension (drawing) direction , the stage can be automatically advanced and retracted, and the extension and storage of the stage can be performed. It's easy. Also, if the highest stage is connected to the front end of the stage, and the height of the top plate of the highest stage is the same as the stage surface,
A staircase can be formed before it as an extension of the stage.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. In this example shown in FIGS. 1 to 5, 1, 2, 3
Are the steps having different heights, and the steps 1, 2, 3
The square pipe is formed in a square on the right and left.
The top and bottom of these front ends are connected by separate square pipes
Form a 10, 20, 30, which has a base plate 11, 21, 31 on the upper surface of the support portion 10, 20, 30 mounted stationary, the
Kick-up plates 12 , 22 , 3 at the front ends of the base plates 11, 21, 31
2 is hanging down.

The length of the riser plates 22 and 32 of the steps 2 and 3 is a height slightly above the lower base plates 11 and 21, and the length of the riser plates 12 of the stage 1 Is a height just above the installation surface . Also, the support parts 10, 20, 30
Below the lower end placement site of the respective riser of 12, 22
Corresponds to the edge.

As shown in FIGS. 2 and 5 , each of the steps 1, 2 , and 3 fixes leg members 13, 23, and 33, which are in contact with the installation surface, to the rear end thereof . projecting the forward guide legs 19,29,39 at the lower end of the wheel 1 on its lower surface
30, 230 and 330 are provided. Further support 1
Rollers 14, 24, 34 as rolling elements are rotatably provided at the front and rear ends of the lower ends of 0, 20, 30.

As shown in FIG. 3, the leg members 13, 23, 3
3 is shifted sideways so that it can be arranged side by side at the time of storage, and as shown in FIG. 2, escape spaces 15 and 25 for arranging the legs 23 and 33 are notched at the rear ends of the base plates 11 and 21. It is set up. At the rear of the base plates 11 and 21, locking members 16 and 26 that lock the upper risers 22 and 32 project upward.

The highest stage 3 has its base plate 31 flush with the stage surface. In this example, the height of the stage 8 is 1 m, and the height of the base plate 21 of the second stage 2 is 7 m.
0 cm, and the height of the base plate 11 of the lowermost stage 1 is 40 cm.

In this embodiment, the front leg 81 of the flip-up stage 8 and the leg member 33 of the highest step 3 are connected by a connecting square pipe 80 , and the step of this example is provided on the front surface of the stage 8. As shown in FIG. 5, the motor 4 and the take-up drum 5 are connected between upper and lower connecting pipes 35 and 36 connecting the lower portions of the leg members 33 of the step board 3 to the left and right and the front leg 81 of the stage 8.
Is provided, the winding drum 5 is rotated through the mesh between the rotating gear 41 of the motor 4 and the rotating gear 51 of the winding drum 5.

As shown in FIG. 3, the winding drum 5
One end of each of the two wires 6 is fixed in the winding direction so as to be opposite to each other, and the other end of each of the wires 6 is connected to the lowermost stage 1 via a pulley 60 provided on the lower connecting pipe 36. It is connected to the support section 10 to form a backward moving device.

Further, reference numeral 7 denotes a forward moving mechanism for extending and biasing each of the steps 1, 2, and 3, as shown in FIGS. 1 and 3, a pair of arms 71, 7
2 drawer (or push in) the bending direction
And the ends of the arms 71 and 72
Parts are pivotally attached to the highest and lowest steps 1,3. Ingredient
Two in the body, the the rear end of the arm 71 of the two rectangular pipes which are connected to one of the upper and lower horizontal rotatably pin-connected to the upper and lower connecting pipe 35, which is connected to the other of the upper and lower The front end of the arm 72 of the square pipe is laterally rotatably pin-connected to the support portion 10 of the step table 1, and the front end of the arm 71 and the rear end of the arm 72 facing each other are horizontally rotatable on the interposition plate 73. The pins are connected.

As shown in FIG. 4, a spring box 75 accommodating a coil spring 74 is provided on the upper arms 71 and 72 so as to be swingable, and inserted into the spring box 75 to be locked on the coil spring 74. The ends of the rods 76 are connected by chains 77, and engaged with a pair of sprocket wheels 78 rotatably held by the intervening plate 73 to constitute a forward moving mechanism.

The operation of the present embodiment thus constructed will be described. First, in the lower stage base 3 of the best part in the accommodated state of FIG. 5, the rear leg member 23, 13 of the other stages stand 2,1 respectively contact
In the grounded state, the next highest step 2 is sequentially placed on the lowest step 1 in a stacked state. When the lowermost stage 1 is pulled out of the stacked and stored state, the locking member 26 of the upper stage 2 stops further advancing movement by the contact of the riser plate 32 of the highest stage 3. Then, by further pulling out the lowermost stage 1, the locking member 16 of the upper stage 1 stops the further forward movement by the contact of the riser plate 22 of the upper stage 2.

As a result, the extended steps 1, 2, and 3 form a step shape. During this movement, even if the stage 2 is in the stacked state, the respective stages 1 and 2 are connected to the rear leg members 13 and
23 is can be advanced extended in smoothly and small force because it is supported respectively ground to the wheel 130, 230. Further, since the rollers 24, 34 roll on the base plates 11, 21, the drawers 1, 2 can be pulled out smoothly.

When the steps 1 and 2 are retracted and stored from the extended state, first, the lowermost step 1 is retracted.
Is located below the upper stage 2 and the stage 2 is placed. When the lowermost stage 1 is further retracted in the mounted state, the placed stage 2 is located below the highest stage 3 and stored under the highest stage 3. is there. Note that the upper step 2 is reciprocated interlockingly by the end of the guide leg 29 of the leg 23 abutting by the support portion 10 or the riser plate 12 of the lower step 1.

At this time, the rollers 24, 3 on the base plates 11, 21
4 rolls, the steps 1 and 2 can be smoothly retracted, and the respective steps 1 and 2 are mounted on the wheels 1 and 2 of the rear legs 13 and 23.
Since they are supported on the ground at 30, 230, respectively, they can be smoothly and lightly retracted . In this storage state,
The legs 23, 33 of the steps 2, 3 are accommodated in the clearance spaces 15, 25 of the base plates 11, 21, and the legs 13, 23, 33 are arranged in parallel.

In this embodiment, since the retreating device and the forward moving mechanism are provided, the extension and storage of the steps 1 and 2 can be automatically performed. That is, at the time of storage, the motor 4
By driving the, for the winding drum 5 is wire 6 rotates is wound, under the stage base 3 of the highest portion while placing the stage table 2 above and stage table 1 the lowermost retreat It is stored in.

At this time, as shown in FIG.
Is bent like a virtual line, so as shown in FIG.
Since the engagement length of the chain 77 with respect to the sprocket wheel 78 is increased, the rods 76 are mutually pulled and the coil spring 74 of the spring box 75 is compressed. For this reason, the forward movement is urged to the stage 1 by the restoring force of the coil spring 74.

Therefore, when retracted, the retracted state of the wire 6 is stronger than the restoring force of the coil spring 74, so that the retracted state is ensured. The stage 1 is moved forward. Thereby, the extension and storage of the steps 1 and 2 can be automated.

As described above, according to the present embodiment, the steps are extended to form the steps, and the other steps 1, 2 are stored under the highest step 3 in a stacked state. 1
With the support of 3, 23, 33 and the rolling support by rollers 24, 34, the forward and backward movement can be smoothly performed. In addition, in the stored state, the inside is concealed by the riser plates 12, 22, and 32, so that the appearance is improved.

In particular, in this embodiment, since it is connected to the stage 8, a staircase can be formed in front of the stage 8, so that it can be used as a chorus base or the like in addition to the usual stairs for ascending and descending. There is no need to secure a large space, and the stage can be used widely. Also,
As shown in FIG. 5, if the stage 8 is a folding storage type,
It is possible to move forward and backward as the steps 1, 2, 3 are stored. Therefore, even when the stage 8 is folded up and stored, the stairs can be extended and used, so that the use can be expanded.

Although the present embodiment is configured as described above, the present invention is not limited to this. For example, regardless of the configuration of each stage, it is only necessary that the stage can be stored in a stacked state under the highest stage. For this reason, the number of steps to be provided is not limited.
It may be a step or five steps. In addition, the configuration and the number of the rolling elements for rolling the mounting surface on the mounting of the base plate portion and the leg material, and on the base plate of the lower stage or on the lowermost stage, are also appropriate. is there.

Furthermore, there is no limitation on the linking structure for interlocking the other steps as the lowermost step moves, and it is optional to provide a lock mechanism for fixing the extended and stepped state.

[0028] In the case of connecting the front end portion of the stage, the other forming a height stage surface flush with the the stage stand base plate up portion, it may be a height lowered one step from the stage surface, the stage There is no limitation on the connection configuration.

[0029]

According to the first aspect of the present invention, the stacking and loading
Freely or push more pull the stage table 1, 2, 3 sequentially was
Because tandem freely placed, with stairs stand is formed by extension, it is than other stages stand 1 to the bottom of the stages in table 3 the highest portion is accommodated in a state stacked stage base 3 of the highest portion The stay
Connect to the front end of G8 and to other steps 1 and 2.
Are wheels 130, 230 that are grounded on the installation surface at the rear.
Legs 13 and 23 are provided, and the lowermost stage 1 is installed
Rolling element 14 that rolls on the surface is
Rolls on the base plates 11 and 21 on which the upper stage is placed
Since the rolling elements 24 and 34 are provided respectively, the respective wheels 13
0,230 with legs 13,23 and each rolling element
The rolling support by the rollers 14, 24, 34 makes it possible to smoothly advance and retreat, and the effect that the extension and storage can be simplified is increased . In addition, the forward moving device
Extension and storage of the steps 1 and 2 due to the provision of the moving mechanism 7
Can be operated automatically. That is, the backward moving device is
Connect the wire 6 to the lowermost stage 1 and connect the wire 6
The winding drum 5 is provided on the highest stage table 2 or 3.
In the extended state of the stairs, the winding drum 5
-6, the lowermost stage 1 retreats
Automatically under the highest step 3 while placing the upper step 2
It can be stored in The forward moving mechanism 7 is bent and stretched.
The pair of arms 71, 72 freely connected to each other
So that the direction corresponds to the pull-out direction of the steps 1, 2
The ends of the arms 71 and 72 to the highest and lowest steps.
Pivotally attached to the tables 1 and 3, while the arms 71 and 72
The chain 77 is engaged with the sprocket wheel 78 provided.
And the ends of the chain 77 to the arms 71 and 72.
Since it is connected to the coil spring 74 provided,
The arms 71 and 72 bend and the sprocket wheel
As the engagement length of chain 77 with respect to 78 becomes longer,
To compress the coil spring 74 connected to the chain 77
The stage 1 is moved forward by the restoring force of the coil spring 74.
And retract the wire 6 at the time of extension.
Only without using a drive device such as a motor.
The stage 1 is moved forward by the restoring force of the Il spring 74.
Then, the steps 1, 2 can be automatically extended.
In the extended state, the arms 71 and 72 extend, and the lowermost and
Since the gap between the highest steps 1 and 3 is maintained, each step
1, 2, and 3 are safe without being displaced back and forth.

In the second aspect, the base plates 11, 21, 3
(1) The kick-up plates 12, 22, and 32 were attached to the front end in a hanging manner.
Therefore, in the stored state, the risers 12, 22, 32
Since the inside is concealed, the appearance is also good.
Furthermore, in the third aspect, the top plate on the top of the highest stage is mounted on the stage.
The stage 8 is provided on the same plane as the
And from the fact that it is stairs stand in front of, the other normal lifting stairs, can be used as a chorus stand, etc., it is not necessary to ensure an extra space for them to stage 8, stearyl
Page 8 can be widely used.

[Brief description of the drawings]

FIG. 1 is a partially cutaway longitudinal side view showing an embodiment of the present invention in an extended state.

FIG. 2 is a perspective view of a main part in an extended state.

FIG. 3 is a partially cross-sectional plan view in the extended state.

FIG. 4 is a partially cutaway plan view showing an enlarged main part of an example of the forward movement mechanism.

FIG. 5 is a vertical sectional side view in the stored state.

[Explanation of symbols]

 1,2,3 step board 10,20,30 Support part 11,21,31 Base plate 12,22,32 Kick-up plate 13,23,33 Leg material 130,230,330 Wheel 14,24,34 Roller 16,26 Locking members 19, 29, 39 Guide legs 35, 36 Connecting pipe 4 Motor 5 Winding drum 6 Wire 60 Pulley 7 Forward moving mechanism 71, 72 Arm 73 Intervening plate 74 Coil spring 75 Spring box 75 77 Chain 78 Sprocket wheel 8 Stage 81 Stage front legs

Claims (3)

(57) [Claims] 1. A plurality of stacked stages are sequentially pulled out.
It is a retractable staircase linked freely and
Connect the highest stage to the front end of the stage and
The other steps are equipped with wheels that contact the ground on the installation surface at the back.
Provide leg material and roll on the installation surface on the lowest step
A table on which the rolling element is placed, and on the other steps, the step directly above
It consists of rolling elements that roll on the board , and connects the wire to the lowermost step and winds up the wire
A retractable moving device with a drum on the highest stage and a pair of arms that are flexibly extended and retracted.
Arrange them so that they correspond to the direction in which the
Pivot the ends to the highest and lowest steps, while the arm
Engages the chain with the sprocket wheel provided in the bending part
And a coil provided with an end of the chain on each arm.
A retractable staircase comprising a forward moving mechanism connected to a spring . 2. A lifting plate is hung on the front end of the plate on the upper surface of each stage.
The retractable floor according to claim 1, wherein the floor is mounted.
Dandai. 3. The top plate on the top of the highest stage is referred to as the stage surface.
2. The method according to claim 1, wherein the first and second surfaces are provided on the same plane.
Item 2. A retractable staircase according to item 2.