JP2003041792A - Elevating step device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate vertical directional looseness of a step derived from a structure of an X link mechanism itself in a step elevating device using the X link mechanism. SOLUTION: This elevating step device S is provided with a step body 5 for forming a step surface 5a, the X link mechanism 6 arranged on an elevating base 8 being a support part arranged on a step floor 1, and elevatably supporting the step body 5, a driving shaft 3 for providing motive power for elevating the step body 5, an operation converting mechanism 7 for transmitting the motive power provided from the driving shaft 3 to the X link mechanism 6, and a step fixing part 9 arranged on the step floor 1. When elevated according to operation of the X link mechanism 6, an upward abutting surface 52a arranged on the step body 5 is applied to a downward abutting surface B1a arranged in the step fixing part 9 to stop elevation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting step device installed on a raised floor or the like.

[0002]

2. Description of the Related Art In aisles such as a moving bleacher, many auxiliary steps are provided in the middle of each floor in order to reduce the height difference between the floors. For convenience of storage or appearance, various devices have been developed for lowering the steps so as to be substantially flush with the passages of the respective floors, and raising the steps during use so that the steps can be used. For example,
It is applied to a moving bleaching seat equipped with a drive shaft that simultaneously tilts up and down the seats that can be tilted up and down on each tier, and uses the rotation of this drive shaft to raise the steps according to the standing up of the seats. It is known that the seat is lowered and the step is lowered according to the fall of the seat. Such a lifting step device
An X-link mechanism is used to support the step from below. One end of the link member that constitutes this X-link mechanism has a bracket fixed to each of the step floor and the step, and a long hole is formed by connecting the one end of the link member with a pin through a long hole provided in the bracket. It is slidable within the length of the hole.

[0003]

However, the X-link mechanism itself is composed of two link members rotatably connected to each other, and is also rotatably connected via a step floor and steps and pins. Therefore, there is a rattling in its internal mechanism. In particular, in the structure in which the pin is passed through the long hole, it is necessary to make a gap above or below the pin in order to allow the pin to move smoothly in the long hole. It is inevitable that it will occur.

In order to solve the above problems, the present invention provides a means for eliminating rattling by pressing the step from above in the raised position and pressing the X-link mechanism from above.

[0005]

That is, an elevating step device according to the present invention comprises a step body, an X-link mechanism installed on a raised floor to support the step body, and a power for raising and lowering the step body. The drive shaft to provide,
The step body includes an operation conversion mechanism that transmits the power provided from the drive shaft to the X-link mechanism and a step fixing portion installed on a raised floor, and when the step body rises as the X-link mechanism operates, a step body is provided. The upward contact surface provided on the step fixing portion is applied to the downward contact surface provided on the step fixing portion to stop the rising.

With this structure, the step body is not only supported from below by the X-link mechanism at the most elevated position but also pressed down from above by the downward contact surface, so that the step body is supported from above and below. Since it is sandwiched and the X-link mechanism is pressed from above via the step body, rattling can be eliminated. In addition, a "step floor" means the structure which forms a step floor surface here.

In order to simplify the manufacturing process and the assembling process, the X-link mechanism is provided with a drive-side link member and a driven-side link member that are rotatably connected to each other at a central portion. One end of the link member may be rotatably connected to the step body, one end of the driven side link member may be rotatably connected to the raised floor, and a rolling wheel may be provided at the other end of each link member.

To enable fine adjustment of the vertical position of the step, the vertical position of the downward contact surface within the step fixing portion or the vertical position of the upward contact surface within the step body can be changed. It is desirable to do.

As a specific embodiment, the downward contact surface is constituted by a lower surface of an adjusting male screw member screwed to the step fixing portion, and the adjusting male screw member is screwed back and forth. Therefore, it is conceivable that the rising width of the step body can be adjusted.

In order to reduce the number of parts as much as possible and prevent the step from sinking even if a force is applied to the step from above, the motion converting mechanism rotates in accordance with the rotation of the drive shaft. An output gear, and a connection link rotatably connected to an output point provided on the output gear and rotatably connected to the input point provided on the drive side link member at the other end, When the upward contact surface provided on the step body is applied to the downward contact surface provided on the step fixing portion to stop the rising, the output point provided on the output gear is substantially the same as the input point of the drive side link member. It may be positioned on a straight line connecting the center of the output gear.

In order to enable the chair to stand upside down and move up and down in the moving bleaching room at the same time, the drive shaft is a drive shaft used in a standing upside down device for a chair used in the moving bleacher. It should be common to.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings.

The lifting step device S according to this embodiment is
It is attached to a moving bleacher K provided with a plurality of raised floors 1. A schematic perspective view of the moving bleachers K is shown in FIGS. 1 and 2.

In addition to the plurality of raised floors 1, the moving bleachers K are seats 2 provided on each raised floor 1 so as to be able to be raised and lowered, and a drive for providing power for raising and lowering these seats 2. Axis 3
And a storage passage (not shown) in which each of the raised floors 1 is in a stacked state, and each of the raised floors includes It can be stored and deployed in a deployment position that is in a shape. 1 and 2 show the expanded position.

More specifically, the raised floor 1 has a floor plate 11 in the front half thereof and a seat unit 12 in the rear half thereof. The seat unit 12 is a unit frame 13 in which a pillar 14 is held so that it can be erected, and the pillar 2 supports the seat 2, and as shown in FIG.
The seat 2 can be used when it is erected, and as shown in FIG. 2, when the pillar 14 is rotated forward, the seat 2 is folded flat and falls down. The up and down movements of the columns 14 are configured to be performed simultaneously by the forward and reverse rotation movements of the drive shaft 3 inserted in the unit frame 13. The drive shaft 3 is inserted from one end to the other end of the raised floor 1, and is rotated forward and backward within a 90 degree angle range by a drive source such as a motor (not shown) provided at the end of the raised floor 1. I am trying to do it. The passage portion 4 is provided at a predetermined position of each terrace 1, and has a walking surface 4a which is substantially flush with the upper edge of the front panel 15 fixed to the front end of the terrace 1.

In the moving bleacher K thus constructed, the lifting step device S according to the present embodiment is provided with the passage portion 4.
The step body 5, an X-link mechanism 6 that supports the step body 5, and a drive shaft 3 that provides power for moving the step body 5 up and down.
A motion conversion mechanism 7 for transmitting the power provided from the drive shaft 3 to the X-link mechanism 6, and a step fixing portion 9 provided vertically upright from the raised floor 1. 3 to 5 are cross-sectional end views in a state in which the step main body 5 is at the maximum raised position, which is the maximum raised position, and FIG. 6 is a longitudinal sectional view, and the step main body 5 is at the maximum lowered position. 7 is a vertical cross-sectional view in the state of being in the maximum descending position.

More specifically, the step body 5 is in the shape of a hollow box that opens downward with the upper surface thereof as the walking surface 5a, and the support frame 51 for receiving the action of the X-link mechanism 6 on the back surface of the upper plate. Installed. Further, as shown in FIG. 3, a brim-shaped projecting body 52 having an upward contact surface 52a is horizontally extended to the left and right of the lower end portion of the step body 5.

The X-link mechanism 6 has a drive-side link member 61 rotatably connected to each other at the center via a pin 60.
And a driven-side link member 62,
It is supported by a lift base 8 which is a support portion provided on the raised floor 1. The elevating base 8 includes a pair of upright plates 81 which are provided upright from the floor plate 11 and the upright plates 81.
It is composed of a channel-shaped base main body 82 provided therebetween. A plan view of the lifting base 8 is shown in FIG. The X link mechanism 6 is provided in a pair on the left and right to support the left and right side end portions of the step body 5 from below,
The link members are arranged in the front-rear direction, that is, at right angles to the drive shaft 3, and the driven side link member 62 is arranged inside the drive side link member 61.

The driving side link member 61 uses a channel-shaped member that opens downward, and its upper front end is
The elevating frame 51 is provided via a pin 610 extending left and right.
Upper bracket 63 fixed to the lower surface of the bolt with bolts, etc.
It is rotatably connected to. On the other hand, the driven-side link member 62 uses a channel-shaped member that opens upward, and its lower front end is fixed to the upper surface of the base main body 82 by a bolt or the like via a pin 620 extending left and right. It is rotatably connected to the bracket 64.

Further, a bearing 611, which is a rolling wheel, is rotatably attached to the lower rear end of the driving side link member 61, and the rolling wheel 611 is mounted on the elevating frame 51.
It is rotatably applied to the lower surface of an upper guide rail 65 in the form of a horizontal plate which is fixedly contacted to the lower surface with a bolt or the like. The center point of the rolling wheel 611 in side view is the input point Y3 that receives the power of the drive shaft 3. Further, at the upper rear end of the driven-side link member 62, a rolling wheel bearing 621 is provided.
Is rotatably mounted, and the rolling wheel 621 is applied to the upper surface of the lower guide rail 66 in the form of a horizontal plate fixed to the upper surface of the base body 82 by bolts so as to be able to roll in the front-rear direction. The thicknesses of the upper guide rail 65 and the lower guide rail 66 are such that the upper and lower positions of the step body 5 and the rolling wheels 611 and 621 are joined together without a gap when the step body 5 is at the maximum raised position, and the walking surface 5a is It is horizontal.

Further, in this embodiment, the left and right driven side link members 62 are connected to each other by the link member fixing plate 67 to prevent the left and right X-link mechanisms 6 from being shaken left and right.
In addition, these are configured to move in synchronization. In addition,
In this embodiment, since the driven side link member 62 is arranged inside, the driven side link members 62 are connected to each other, but in the embodiment where the driving side link member 61 is arranged inside,
The drive side link members 61 may be connected to each other.

The drive shaft 3 provides power for raising and lowering the step body 5, and is used for providing power for raising and lowering the seat 2 in the moving spectator K. 3 are shared.

The motion converting mechanism 7 transmits the power provided from the drive shaft 3 to the X-link mechanism 6.
An intermediate gear 73 for decelerating the rotation of the drive shaft 3 and transmitting it to the output gear 71, an output gear 71 connected to the intermediate gear 73 and rotating with the rotation of the drive shaft 3, and one end portion of which outputs the output An output point Y2 provided on the gear 71 is rotatably connected to a rolling wheel 611 having the other end as an input point Y3 provided on the drive side link member 61 as a center thereof.
The connecting link 7 that moves back and forth as the output gear 71 rotates.
It consists of 2.

More specifically, the intermediate gear 73 comprises two large and small gears 731 and 732, and a shaft 733 which supports the gears 731 and 732 in common and is laid horizontally between the upright plates 81. The gear 31 and the small gear 732 provided on the drive shaft 3 are meshed with the output gear 71, respectively. The two large and small gears 731 and 732 are integrated. The output gear 71 is supported by a shaft 711 extending horizontally between the upright plates 81, and a pin 71 is provided at an output point Y2 set at a position deviated from the rotation center Y1.
It is rotatably connected to one end of the connecting link 72 via 0. The connection link 72 is composed of a pair of substantially rectangular plates in plan view, one end of which is connected to the output gear 71 via the pin 710 as described above, and the other end thereof is the rolling wheel 611. It is rotatably connected to the shaft. The shaft 733 of the intermediate gear 73 and the shaft 711 of the output gear 71 have both ends fixed to the standing plate 81.

The step fixing portions 9 are vertically erected from the floor plate 11, and a pair of step fixing portions 9 are provided on the left and right sides of the step body 5. This is in the form of a plate perpendicular to the drive shaft 3, and from the upper end thereof toward the step body 5 side,
A plate 91 whose upper surface is flush with the walking surface 4a of the passage 4 extends in the horizontal direction. This plate 91 is provided with a through hole (not shown) penetrating up and down, and the nut N1 is fixed to the lower surface by welding or the like in a state where the screw hole is overlapped with the through hole. A male screw member B1 is screwed into the nut N1 from above, and the male screw member B1 is
The lower surface of the is a downward contact surface B1a.
The upper and lower positions of the downward contact surface B1a are joined to the upward contact surface 52a without any gap when the step body 5 reaches the maximum raised position by screwing the male screw member B1 forward and backward, and the rising width of the step body 5 is increased. Is adjusted to be smaller than the maximum rising width of the X-link mechanism 6 by the vertical width of the rattling to absorb the rattling. In addition, in the present embodiment, the nut N1 is provided above the plate 91.
Another nut N2 and a male screw member B1 are screwed together to sandwich the plate body 91.

The operation of the elevating step device S according to the present embodiment having the above-described structure will be described. When the seat 2 is lying down as shown in FIG. 7, the output point Y2 provided on the output gear 71 is It is located above the straight line connecting the center Y1 of the gear 71 and the input point Y3 which is the center of the rolling wheel 611, and the rolling wheels 611 and 621 are located rearmost. Therefore, the X link mechanism 6 is in the most contracted state, and the step body 5 is at the maximum lowered position. In this state, the walking surface 5a of the step body 5 and the walking surface 4a of the passage portion 4 are flush with each other. From this state, when the drive shaft 3 is rotated in the direction A in the figure to raise the seat 2, the output gear 71 also rotates in the direction A, and the output point Y2 rotates forward. . Along with this, since the connecting link 72 moves forward, the rolling wheels 611, 621 also move forward, the link members 61, 62 of the X link mechanism 6 stand up, and the step body 5 rises. To do.

When the X-link mechanism 6 moves up, the upward abutment surface 52a provided on the step body 5 comes into contact with the downward abutment surface B1a provided on the step fixing portion 41, and the elevation stops, and the maximum After reaching the raised position, the state shown in FIGS. 3 and 6 is obtained. This time,
The output point Y2 provided on the output gear 71 is substantially on a straight line connecting the input point Y3 which is the center of the rolling wheel 611 provided on the drive side link member 61 and the center Y1 of the output gear 71. . As a result, even if a force is applied from the walking surface 5a, it is not converted into the rotational force of the output gear 71, and the step body 5 does not sink. When the step body 5 reaches the maximum raised position, the lower surface of the connecting link 72 is
The upper surface of the elevating base 8, specifically, the upper surface of the lower guide rail 66, is pressed against the connecting link 72 to prevent it from moving.

Next, when the drive shaft 3 is rotated in the direction B in FIG. 6 in order to recline the seat 2, the step body 5 moves to the most lowered position as shown in FIG. It descends and returns to the state shown in FIG.

As described above, according to the lifting step device S according to the present embodiment, the upward contact surface 5 provided on the step body 5 is provided.
2a provided on the step fixing portion 9 facing downward B
Since the rising is stopped by hitting the step body 1a, the step body 5 is supported so as to be sandwiched between the X link mechanism 6 from below and the downward contact surface B1a from above at the maximum rising position. On the other hand, focusing on the X-link mechanism 6, at this maximum raised position, the X-link mechanism 6 is pressed from above via the step body 5, and the rattling that the X-link mechanism 6 itself has due to its structure is above-mentioned. It is absorbed by the pressure from the walking surface 5
It is possible to provide the walking surface 5a with a sense of stability without rattling or abnormal noise accompanying it when a force is applied from above a.

Further, a drive shaft 3 for providing power for raising and lowering the step body 5 and a drive shaft 3 for use in an upright and inversion device of a chair for erecting the seat 2 used in a moving bleaching seat K, and Since they are common, the chair 2 can be raised and lowered and the step body 5 can be moved up and down at the same time without increasing the number of parts.

Further, rolling wheels 611 and 621 provided on the driving side link member 61 and the driven side link member 62 constituting the X link mechanism 6 are provided on the step body 5 and the elevating base 8, respectively, and guide rails 65 are provided. Since it suffices to simply apply the pin to 66, unlike the conventional structure in which the pin is passed through the long hole, the step of preventing the pin from coming off through the pin can be omitted. Further, with such a configuration, the number of parts to be assembled in the factory is increased and unitization is possible, so that the on-site assembly process can be greatly simplified.

In addition, since the vertical position of the downward contact surface B1a can be adjusted, the X-link mechanism 6
Can be suppressed more effectively.

Particularly, since the vertical position of the downward contact surface B1a is adjusted by moving the male screw member B1 forward and backward, the step lift device S
Can be easily adjusted.

At the maximum raised position, the output point Y2 provided on the output gear 71 is substantially the center of the rolling wheel 611 provided on the drive side link member 61 and the output point Y3 and the center Y1 of the output gear. Since it is arranged on the straight line connecting with, even if a force is applied such that the rolling wheels 611 retract from the walking surface 5a, a force is applied to the output point Y2 only in the central direction of the output gear 71. . Therefore,
Since the output gear 71 does not rotate and the rolling wheels 611 do not retract, it is possible to prevent the step body 5 from sinking downward.

The lifting step device according to the present invention is not limited to the embodiment described above. For example, rolling wheel 6
11, 621 do not have to be bearings, and general rollers or the like may be used. Further, instead of the rolling wheels 611 and 621, a structure in which a pin is inserted through a conventional long hole may be adopted.

Further, a female screw hole is provided in the projecting body 52 provided in the step body 5 so that the adjusting male screw member B1 is screwed so as to be able to move forward and backward, thereby making it possible to adjust the vertical position of the upward contact surface 52a. Well, downward contact surface B1
The adjustment function of the vertical position of the contact surface 52a or the upward contact surface 52a may be omitted.

In addition, from the motion converting mechanism 7 to the intermediate gear 73
May be omitted, and instead of providing the output point Y2 on the output gear 71, a rotary arm or the like may be extended from the shaft 711 of the output gear 71 and set at the tip thereof. Further, if the lower surface of the connecting link 72 is brought into contact with the upper surface of the base body 82 in the state where step 5 is raised to the maximum, the output point Y
2 does not have to be exactly on the straight line connecting the input point Y3, which is the center of the rolling wheel 611, and the center Y1 of the output gear, and may be on the lower side thereof.

The elevating step device S is installed in the moving bleacher K, and its drive shaft 3 is used in common with the drive shaft 3 used in the erecting and inverting device of the chair 2 used in the moving bleacher K. Also, the elevating step device S may be installed in a place other than the moving bleachers K so that only the elevating and lowering of the step body 5 is performed by using a dedicated drive shaft, or it is used for an operation other than the standing upside down of the chair 2. The step body 5 may be lifted and lowered at the same time when the step body 5 is shared with the drive shaft.

[0039]

As described above, according to the present invention,
A step body that forms a step surface, an X-link mechanism that is installed in a support portion provided on a raised floor and that supports the step body so that the step body can move up and down, and a drive shaft that provides power for raising and lowering the step body, A motion conversion mechanism that transmits the power provided from the drive shaft to the X-link mechanism and a step fixing part provided on the raised floor are provided, and when the step-fixing part moves up as the X-link mechanism moves, Since the upward contact surface provided on the step body is contacted with the downward contact surface provided on the step fixing portion to stop the ascent, the rattling caused by the structure of the X-link mechanism itself can be eliminated, and walking with a sense of stability Can provide a face.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an embodiment of the present invention.

FIG. 2 is a schematic view showing when the step body is lowered in the same embodiment.

FIG. 3 is a transverse end view of the lifting step device according to the embodiment.

FIG. 4 is a cross-sectional end view in the vicinity of an upper end portion of a driving side link member of the lifting step device according to the same embodiment.

FIG. 5 is a cross-sectional end view in the vicinity of an upper end portion of a driven side link member of the lifting step device according to the same embodiment.

FIG. 6 is a vertical cross-sectional view of the lifting step device according to the same embodiment in a standing state.

FIG. 7 is a vertical cross-sectional view of the lifting step device according to the same embodiment in a collapsed state.

FIG. 8 is a plan view of a lifting base that constitutes the lifting step device according to the embodiment.

[Explanation of symbols]

S ... Lifting step device 1 ... tiered floor 5 ... Step body 52a ... upward contact surface 6 ... X-link mechanism 61 ... Link member on driving side 62 ... Link member on driven side 611, 621 ... Rolling wheels 65 ... Upper guide rail 66 ... Lower guide rail 7. Motion conversion mechanism 71 ... Output gear 72 ... Link 8 ... Lifting base (support) 9 ... Step fixing part Y1 ... Center of output gear Y2 ... Output point Y3: Input point B1 ... Male screw member for adjustment B1a ... downward contact surface K: Moving bleachers

Claims (6)

[Claims] 1. A step body having a walking surface, an X-link mechanism installed on a supporting portion provided on a raised floor to support the step body so that the step body can be raised and lowered, and power for raising and lowering the step body is provided. It comprises a drive shaft, a motion conversion mechanism for transmitting the power provided from the drive shaft to the X-link mechanism, and a step fixing part provided on the raised floor, and when the arm moves up along with the operation of the X-link mechanism. Further, the lifting step device is characterized in that the upward contact surface provided on the step body is brought into contact with the downward contact surface provided on the step fixing portion to stop the rising. 2. The X-link mechanism includes a drive-side link member and a driven-side link member that are rotatably connected to each other at a central portion, and one end of the drive-side link member is a step body, and the driven link member is a driven body. One end of the side link member is rotatably connected to each of the supporting portions, and rolling wheels are provided at the other end of each of the link members. These rolling wheels are provided on guide rails respectively provided on the step body and the supporting portion. The lifting step device according to claim 1, wherein the lifting step device is applied. 3. The elevating step according to claim 1, wherein the vertical position of the downward contact surface within the step fixing portion or the vertical position of the upward contact surface within the step body can be changed. apparatus. 4. The downward contact surface is constituted by a lower surface of an adjusting male screw member screwed into the step fixing portion, and the ascending width of the step body is made by screwing the adjusting male screw member back and forth. 4. The lifting step device according to claim 3, wherein the lifting step device is adjustable. 5. The operation conversion mechanism rotatably connects one end to an output point provided on the output gear, and the other end to the drive side, the output gear rotating with the rotation of the drive shaft. And a connecting link rotatably connected to an input point provided on the link member. The upward contact surface provided on the step main body is brought into contact with the downward contact surface provided on the step fixing portion to stop the rising. In this case, the output point provided on the output gear is located substantially on a straight line connecting the input point provided on the drive side link member and the rotation center of the output gear. 1, 2,
3. The lifting step device according to 3 or 4. 6. The drive shaft used in a standing upside down device for a chair used in a moving bleacher is common to the drive shaft. Lifting step device.