JP2010037825A - Height variable ascent/descent type staircase unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a height variable ascent/descent type staircase unit which makes possible easy variations in height and which includes a simplified structure in correspondence with an ascent/descent floor of which the height varies. <P>SOLUTION: The height variable type ascent/descent type staircase unit includes a plurality of tread surface blocks 11 connected to each other and a plurality of guide rails 30 which are provided vertically and which guide each of the tread surface blocks 11. Each of the tread surface blocks 11 includes a coupling means 20 used for connecting each other, a tread surface 12, and a side plate 13 which is provided fixedly on the side of the tread surface 12 and is guided by the guide rail 30. Then the tread surface block 11 at the topmost stage is ascended by an ascent/descent means. Because of this, the tread surface block 11 which follows it is raised, and the height (H) of a rise between each of the raised tread surface blocks 11 becomes constant. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a height-variable lifting type stair apparatus applied to a stage that moves up and down, and more particularly to a height that can be arbitrarily varied by being applied to a lifting stage that accesses a lifting floor such as a factory or a theater. The present invention relates to a variable lift type staircase device.

  Conventionally, in order to maintain a large machine part in a factory, for example, an operator has been on a work floor that moves up and down around the machine part and repairs the machine while adjusting the height of the work floor. In such a case, in order for the worker to get on and off the work floor at an arbitrary height, a staircase corresponding to the height of the work floor is required.

An example of a conventional height-variable staircase according to the necessity will be described with reference to FIGS. 11 (a) and 11 (b) has a plurality of step surfaces 50, and a plurality of treads 50 are provided at the front, rear, left and right corners 4 arranged at the front, rear, left and right. It is pivotally supported by the swinging column 51 of the book. A plate-shaped landing 52, that is, a stage, is pivotally supported at the upper end of the column 51. A roller 54 provided at the lower end of the column 51 is supported by a slide guide 53 disposed on the floor so as to be horizontally movable.
When the stage 52 is raised to a predetermined height as shown in FIG. 11A, the tread surface 51 becomes stepped, and a person reaches the stage 52 while stepping on the plurality of tread surfaces 50 to perform a desired work. Can do. When the stage 52 is lowered to the lowest position, the staircase is in a substantially horizontal state as shown in FIG. 11B, and one end on the floor side of the tread surface 50 slides away from the stage 52 to form a passage.

  In the conventional variable height staircase, by changing the height of the stage 52, the height and inclination angle of the staircase change, and the height rises with the change in height, that is, the height difference between adjacent treads. Change. When the stage is on the lower side, the inclination angle becomes shallow and there is no lift that can be said to be a staircase. As a passage, each tread surface 50 is not flush and is in a rugged state, which is dangerous. Further, as the stage becomes higher, there is a problem that the amount of overlap of the treads 50 increases, the treads used become narrower, and it is difficult to go up and down.

As another ascending / descending staircase, an ascending / descending stair mechanism that can lift a vehicle such as a wheelchair has been proposed (Patent Document 1). This elevating and lowering staircase mechanism is a flat landing field where a horizontal mounting table slidably provided on a guide rail and adjacent steps are connected to each other in a vertically movable manner so that a plurality of intermediate steps are mounted on the horizontal mounting table. Although it is effective for wheelchair users, the scale of the ascending / descending stairs is large and the structure is complicated.
In addition, each step of the staircase can be moved up and down, and the stepping plate of each step is flush with the upper floor with all the steps raised, so that the floorboard on the upper floor is lowered from the upper floor Stairs have been proposed (Patent Document 2). This staircase is effective in the case of a physically handicapped person, but requires a cylinder device as a lifting device for the stepping plate of each step, has a complicated structure, and requires a control device.
JP 2001-122573 A JP 2004-26404 A

  The present invention has been made in view of the problems as described above, and the structure can be easily changed and the structure can be simplified in correspondence with the lifting floor whose height is changed by the lifting means. An object of the present invention is to provide an elevating stair apparatus with a variable height.

  The height-variable lifting / lowering stair apparatus according to the present invention includes a plurality of tread blocks 11 connected to each other and a plurality of guide rails 30 that are suspended and guide each tread block 11. In the stepped stair device, each of the tread blocks 11 has a connecting means 20 and a tread 12 for connecting each other, and a side plate 13 fixed to the side of the tread 12 and guided by a guide rail 30. The upper tread block 11 is lifted by the elevating means, and the subsequent tread block 11 is raised, and the raised height H between the raised tread blocks 11 is constant.

  Further, according to the present invention, the tread surface 12 of each tread block 11 at the lowest position is flush.

  According to the present invention, the uppermost tread block 11 is connected to the stage 40, and the stage 40 is connected to the lifting floor 1 that is moved up and down by the lifting means.

  Further, according to the present invention, the side plate 13 includes tilting restraining rollers 31 and 32 that engage with the guide rail 30 to prevent the tread block 11 from tilting and horizontal restraining rollers 35 and 36 that prevent horizontal movement. The connecting means 20 includes a plate-like connecting member 22 having a long hole 21 provided in one tread surface block 11 and a connecting pin 23 provided in the other tread surface block 11 and engaging with the long hole 21. The height-variable lifting type staircase device according to claim 1.

The present invention has the following effects.
(A) Since the tread block on the uppermost floor is moved up and down by power means and the other tread blocks are operated to follow, the height of the stairs can be adjusted, so that one power means can be provided.
(B) The horizontal projection area of the stairs is constant regardless of the height adjustment of the stairs, and the installation area can be minimized.
(C) Regardless of the height adjustment of the stairs, the raised height of each step is constant, and the stairs are easy to climb up and down and are safe.
(D) Since the stairs are formed by connecting a plurality of tread blocks having the same structure and having a simple structure, the structure of the entire stairs is simple and easy to manufacture.
(E) When the height of the stairs is at the lowest level, that is, horizontal, the tread surface of each tread block becomes flush and can walk smoothly and safely.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In FIG. 1 to FIG. 3, reference numeral 10 denotes a height-variable lifting / lowering stair apparatus that can arbitrarily change the height. The height-variable lifting / lowering stair apparatus 10 is a lifting floor 1 that is used in a factory or the like. This is shown in the example attached to the working floor.
In FIG. 1, four screws 2 are erected and supported by a support column 4 on the left and right sides and the back side (the rear side in the drawing), and nuts 3 are screwed onto the screws 2. Each screw 2 is rotated by a motor 5 via a bevel gear 6 and a transmission shaft 7.

  Support members 8 provided on each nut 3 support the bottom surfaces of the four corners of the lift floor 1. As the motor 2 rotates, the screw 2 rotates, whereby the nut 3 moves up and down, and the elevator floor 1 moves up and down. In the present embodiment, the motor 5, the screw 2, and the nut 3 constitute an elevating means 9.

  An operator who rides on the lifting floor 1 appropriately rotates and rotates the motor 5 and the screw 2 to maintain and repair the machine part W at an appropriate height while lifting and lowering the lifting floor 1.

  A specific configuration of the variable height elevating stair apparatus 10 will be described with reference to FIGS. The stair apparatus 10 includes a plurality of tread blocks 11 having the same structure and connected in the front-rear direction. In the present specification, the front-rear direction refers to the front-rear direction when viewed in the direction of rising stairs.

  Each tread block 11 has a tread surface 12, and side plates 13 are fixed on both sides thereof. The side plate 13 has an upper portion 14, an intermediate portion 15 depending from the upper portion 14, and a lower portion 16 formed at the lower end thereof, and the upper portion 14 and the intermediate portion 15 have an inverted L shape when viewed from the side.

  Adjacent tread blocks 11 are connected to each other by connecting means 20. The connecting means 20 includes a plate-like connecting member 22 fixed to the intermediate portion 15 and having a long hole 21 in the vertical direction, and a connecting pin 23 provided on the upper portion 14 to engage with the long hole 21. .

  A plurality of columnar guide rails 30 are provided in the vertical direction in order to guide the plurality of tread blocks 11 without tilting back and forth and left and right. That is, tilt restraining rollers 31 and 32 are provided at the rear portion of the upper portion 14 of the side plate 13 and the front portion of the lower portion 16, respectively. The tilt restraining roller 31 is engaged with the front surface 33 of the guide rail 30, and the tilt restraining roller 32 is engaged with the rear surface 34 of the guide rail 30, so that the tread block 11 is tilted by the guide rail 30. It can move up and down in the vertical direction while being restrained.

  The upper portion 14 and the lower portion 16 of the side plate 13 are provided with horizontal restraining rollers 35 and 36 for restraining the movement of the tread block 11 in the horizontal direction. 37 and 38 are engaged.

  The attachment positions of the tilt restriction rollers 31 and 32 and the horizontal restriction rollers 35 and 36 are not limited to the illustrated example, and the attachment positions may be changed while maintaining their functions. Further, as shown in the figure, the rotation axes of the tilting restriction rollers 31 and 32 are directed in the left-right direction, and the rotation axes of the horizontal restriction rollers 35 and 36 are directed in the front-rear direction.

  As shown in FIGS. 4 and 5, when the front tread block 11 rises a predetermined distance, the rear upper surface of the lower portion 16 engages with the front lower surface of the upper portion 14 of the rear tread block 11, The subsequent tread block 11 is raised. The distance between the tread surfaces 12 and 12 of the front and rear tread block 11 is a predetermined raised height H.

  A stage 40 is connected to the uppermost tread block 11, and the landing or stage 40 is connected to the lift floor 1 as shown in FIG. Therefore, when the elevating floor 1 is moved up and down by the elevating means 9, the stage 40 and the tread block 11 are raised and lowered accordingly. Although the stage 40 is arrange | positioned at the side part of the raising / lowering floor 1 as FIG. 1 shows, you may arrange | position in the front part or the rear part of the raising / lowering floor 1. FIG.

  A mounting member 41 for mounting the tread block 11 is disposed on the floor surface F (see FIGS. 1 and 2), and the upper surface of the mounting member 41 forms a horizontal plane. Handrails 42 are provided on the left and right sides of each tread block 11. The mounting member 41 may be fixed to the guide rail 30.

  In order to make it easy to get on and off the liftable staircase 10, a small landing 43 and a fixed staircase 44 are provided in front of the lowermost tread block 11, and handrails 45 and 46 are attached to the small landing 43 and the fixed staircase 44, respectively. Has been.

  The operation of the elevating step device according to the embodiment of the present invention as described above will be described.

  When the elevating floor 1 is at the lowest position, all the tread surface blocks 11 are also at the lowest position following that, and are placed on the placement member 41 as shown in FIG. In this case, the tread surface 12 of each tread block 11 is flat.

  When the elevator floor 1 is raised, the elevator 40 is sequentially raised from the stage 40 and the uppermost tread block 11 following it. In FIG. 4, the third tread block 11 is raised from the uppermost tread block 11. In this case, an operator can perform maintenance of the machine W on the lift floor 1 having an intermediate height. In this way, even when the uppermost tread block 11 is at an intermediate height, the raised height H between the adjacent tread blocks 11 is constant, and the stairs can be moved up and down safely and smoothly. . Further, the upper surface of the tread surface 12 of the tread block 11 shown first and second from the right shown in FIG. 4 is flush and flat, and can be safely and smoothly walked.

  When the uppermost tread block 11 is further raised from the state of FIG. 4 and the rightmost tread block 11 of FIG. 4 is raised by the raising height H, the stair device 10 has the highest height shown in FIGS. Thus, it is possible to work on the lifting floor 1 having the highest height. In this case, the rightmost tread block 11 is free, but it may be locked to the mounting member 41 by a locking means (not shown) and restrained from rising as required. By performing the reverse operation to the above, the stair apparatus 10 can be lowered to the state shown in FIG. 10, and the tread surface 12 of each tread block 11 at the lowest position is in a flat flush state.

It should be noted that the illustrated embodiment is merely an example, and is not a description to limit the technical scope of the present invention.
For example, the elevating means has been described with an example of a screw / nut, but a known elevating means such as an air cylinder or a hydraulic cylinder may be used, and the stage is configured integrally with a work floor which is an elevating floor. The stage may be separated from the lifting floor and can be moved independently. In that case, the stage may be moved up and down by its own single lifting means. Further, the tilting restraint roller may be replaced with a horizontal restraint roller as a sliding member.

1 is a front view showing an embodiment of a variable height elevating stair apparatus according to the present invention. The side view seen from the variable type raising / lowering stair apparatus left side of FIG. The figure which shows the raising / lowering means and stage part of FIG. Explanatory drawing of the rising process of a tread block. The detailed side view of a tread block. The figure which shows the relationship between a tread block and a guide rail. A side view showing a tread block and a handrail alone. The top view of a tread block and a guide rail. The front view of a tread block and a handrail. The side view of the stair device with all tread blocks in the lowest position. (A) is a figure which shows the state which the conventional raising / lowering staircase went up, (b) is a figure which shows the state which the conventional raising / lowering staircase fell.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Elevating floor 2 ... Screw 3 ... Nut 10 ... Elevating type stair device 11 ... Tread surface block 12 ... Tread surface 13 ... Side plate 20 ... Connecting means 21 .... Long hole 22 ... Connecting pin 30 ... Guide rails 31, 32 ... Tilt restraint rollers 35, 36 ... Horizontal restraint rollers 42 ... handrails

Claims (4)

In a variable height elevating stair apparatus having a plurality of tread blocks connected to each other and a plurality of guide rails that are suspended and guide each tread block, the tread blocks are connected to each other. Means and a tread, and a side plate fixed to the side of the tread and guided by a guide rail, and the next tread block is raised by raising the uppermost tread block by the elevating means, A height-variable elevating staircase device, wherein the raised height between each raised tread block is constant. 2. The variable height elevating staircase device according to claim 1, wherein the tread surface of each tread block at the lowest position is flush. 2. The height-variable lifting type stair apparatus according to claim 1, wherein the uppermost tread block is connected to a stage, and the stage is connected to a lifting floor that is moved up and down by a lifting means. The side plate has a tilt restraining roller that engages with the guide rail to prevent the tread block from tilting, and a horizontal restraining roller that prevents the horizontal movement, and the connecting means has a long hole provided in one tread block. The height-variable elevating-type stairway device according to claim 1, further comprising: a plate-like connecting member having a connecting pin that is provided on the other tread block and engages with the elongated hole.

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