JP2008050111A - Step eliminating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a step eliminating device capable of dispensing with, in particular, a driving source as an advance and retraction means of a bridge and dispensing with a bridge retraction prevention mechanism when the bridge advances or retracts. <P>SOLUTION: This step eliminating device installed in front of stairs composed of about a plurality of steps, is provided with a pedestal 4 moved vertically by rise and fall means 2a, 2b, 3, and the bridge 13 stored in the pedestal 4 and advancing or retracting for the pedestal 4 by the advance and retraction means 14. When lifting while a wheelchair, etc. is put on the pedestal 4, the bridge 13 advances toward the stairs to overlap a tip of the bridge 13 on the uppermost step of the stairs, and then the step eliminating device runs and moves toward the stairs on the bridge 13. The bridge 13 can advance or retract automatically by only the driving source for elevation by operating the retractable means of the bridge 13 in the interlocking relationship with the rise and fall means 2a, 2b, 3 by using a wire 14 or the like. When the step eliminating device descends, the bridge 13 is automatically stored by an extending and retracting means such as a spring 18. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a step eliminating device that eliminates a step difference in stairs.

As this type of device, the pedestal is also moved horizontally when moving up and down by the link method, and the pedestal is suspended at the top of the staircase, and when the horizontal movement distance does not reach the top staircase, the gear mechanism is used for horizontal extension. It is known that the end of the bridge is suspended on the top of the staircase and has a doubly-supported beam structure in which an uneven load moment is not applied to the step difference eliminating device body (see Patent Document 1).
JP-A-6-40698

  In the above prior art, the pedestal is also moved horizontally when moving up and down by the link method, and the pedestal is suspended at the top of the stairs, and when the horizontal movement distance does not reach the top stairs, it is horizontally extended by a gear mechanism. It is proposed that the end of the bridge is suspended on the top of the staircase, but when this method is used, it is necessary to place the object on the pedestal during elevation, which involves horizontal movement, Until the pedestal is suspended over the top of the stairs beyond the top of the step resolution device, or until the pedestal leaves the top of the stairs and returns to the top of the step cancellation device, the load on the pedestal tilts to the step resolution device. There was a first problem that a moment was applied.

  In addition, there is a second problem that a driving source such as a gear is required as means for advancing and retracting the bridge.

  Furthermore, when entering the bridge, there is a third problem that a retraction prevention mechanism is required so that the advancing bridge does not easily retreat when entering from the top of the stairs.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a level difference eliminating device that does not require a tilting moment, does not particularly require a drive source as a bridge advancing / retreating unit, and does not need to separately provide a bridge retraction preventing mechanism when the bridge is advanced. .

  In order to achieve the above object, the invention described in claim 1 of the present invention is installed in front of a plurality of stairs, and is accommodated in a pedestal that moves up and down by lifting means, A bridge that advances and retreats with respect to the pedestal by the advancing / retreating means, and when the chair is lifted with a wheelchair or the like placed on the pedestal, the bridge is advanced toward the stairs by the advancing / retreating means so that the tip of the bridge is the topmost step In the step elimination device that overlaps and then travels on the bridge toward the stairs, the bridge can be advanced automatically only by the lifting drive source by linking the bridge advancing and retracting means with the lifting means with a wire etc. According to the second aspect of the present invention, the bridge can be automatically stored by an expansion / contraction means such as a spring when the step eliminating device descends. It is characterized in.

    As described above, according to the present invention, since the bridge advancing / retreating means is linked to the lifting / lowering means with a wire or the like, the bridge can be automatically advanced only by the lifting / lowering driving source, and the driving source is used as the advancing / retreating means. Not particularly necessary.

  Further, since the extension means such as a tension spring is provided on the opposite side of the bridge, the bridge is automatically stored in the pedestal when the step eliminating device is lowered.

  In addition, since the bridge is always pulled by the wire when the bridge is advanced, it is easy to bridge even if horizontal and downward loads are applied when entering the bridge from the top step surface. Is not retracted, and it is not necessary to provide a separate structure for preventing the bridge from retreating.

  Hereinafter, a step eliminating device according to an embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a side sectional view of a step eliminating device comprising a pedestal that can be moved up and down by an elevating means and a bridge that is movable in the horizontal direction on the pedestal, FIG. 2 is a top view of the pedestal incorporating the bridge, and FIG. Is a front sectional view of the pedestal as seen from the staircase side, and FIG. 4 is an explanatory view showing the moving state of the bridge.

  In FIG. 1, the step eliminating device A installed on the floor surface 5 includes a lower base 1 fixed to the floor surface 5, intersecting columns 2 a and 2 b that are rotatably coupled at intersections, and an intersecting column 2 a. And a hydraulic cylinder 3 interposed between the lower seat 1 and a pedestal 4.

  The lower end of one cross column 2b is rotatably fixed to the lower seat 1, and a roller is attached to the lower end of the other cross column 2a so as to be movable on the lower seat 1.

  Further, the upper end of the cross column 2a is rotatably fixed to and supported by the lower surface of the pedestal 4, and a roller is attached to the upper end of the other cross column 2b to movably support the lower surface of the pedestal 4.

  During vertical movement, the load on the pedestal 4 is supported by the cross pillars 2a and 2b with the center of gravity sandwiched between the left and right sides, so that no stepping moment is applied to the step eliminating device A.

  The pedestal 4 has a bridge 13 that advances and retreats in the horizontal direction, a bridge rear end roller 12 attached to the rear end of the bridge 13, and a fixed roller 11 that supports the lower surface of the bridge 13 near the bridge 13 exit of the pedestal 4. Yes.

  Further, the pedestal 4 is supported by a joint portion of pulleys 15a and 15b fixed to the pedestal 4 and supporting the bridge driving wire 14, two links 16a and 16b supported by the cross columns 2a and 2b, and both links 16a and 16b. The traction pulley 17 and one end are fixed to the lower seat 1, the bridge 17 and one end are fixed to the lower seat 1 via the traction pulley 17 and the pulleys 15a and 15b, and the traction pulley 17 and the pulleys 15a and 15b are connected to each other. A bridge drive wire 14 having the other end fixed to the rear end side of the bridge 13 is provided, and when the pedestal 4 is raised by the hydraulic cylinder 3, the bridge 13 is horizontal from the bridge 13 outlet portion of the pedestal 4. Advance in the direction.

  A tension spring 18 is provided on the rear end side of the bridge 13 in the base 4.

  With such a structure, when the pedestal 4 is raised, the traction pulley 17 moves in accordance with the lateral movement of the roller side end of the cross column 2a, 2b in addition to the rise of the pedestal 4, so that the bridge drive A bridge in which the wire 14 is pulled by an extension of the distance between the end fixed to the lower seat 1 and the traction pulley 17 and the distance between the traction pulley 17 and the pulley 15b, so that the local end of the bridge drive wire 14 is fixed. 13 advances and the tip of the bridge 13 reaches the top floor 6 of the stairs. Further, when the bridge is lowered, the bridge drive wire 14 is loosened, so that the bridge 13 is accommodated in the base 4 by being pulled by the pull spring 18.

  That is, the bridge can be advanced and retracted in conjunction with the raising and lowering of the pedestal 4 without providing a drive source as a means for advancing and retracting the bridge.

  Further, the bridge 13 is always pulled by the bridge drive wire 14 when moving forward and backward.

  For this reason, even when a horizontal load or a downward load is applied when entering the bridge 13 from the top surface of the uppermost staircase 6, the bridge 13 does not easily retreat, and a separate structure for preventing the retraction of the bridge 13 is provided. There is no need.

  In this embodiment, the lifting device of the level difference eliminating device is a link system using a hydraulic cylinder and a cross column, but the same effect can be obtained even if other lifting devices are used.

  Further, although the wire interlocking method is used for the advancing / retreating means of the bridge, the same effect can be obtained in other interlocking methods such as a chain.

It is side surface sectional drawing of the level | step difference elimination apparatus concerning one Embodiment of this invention. It is a top view of FIG. It is front sectional drawing of FIG. It is a movement state figure of the bridge which advances and retreats in the horizontal direction from the level difference cancellation device concerning one embodiment of the present invention.

Explanation of symbols

A Level difference elimination device 1 Lower seat 2 Crossing strut 3 Hydraulic cylinder 4 Base 5 Floor 6 Top stage of stairs 11 Fixed roller 12 Bridge rear end roller 13 Bridge 14 Bridge drive wire 15a pulley 15b pulley 16a link 16b link 17 Traction pulley 18 Pull spring

Claims (2)

  The wheelchair is installed in front of a plurality of stairs and includes a pedestal that moves up and down by lifting means and a bridge that is housed in the pedestal and moves forward and backward with respect to the pedestal by advancing and retracting means. In the step elimination device that moves the bridge toward the stairs and overlaps the top end of the bridge with the uppermost step of the stairs and then travels on the bridge toward the stairs A step eliminating device characterized in that the bridge advance / retreat means is interlocked with the elevating means by a wire or the like so that the bridge can be automatically advanced / retreated only by the elevating drive source.   The step eliminating device characterized in that when the step eliminating device descends, the bridge can be automatically accommodated by expansion / contraction means such as a spring.

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