JP2018177502A - Lift for wheelchair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lift for a wheelchair with higher safety by having a blockage bar for preventing a user from falling from a table and depending on a state of this blockage bar by restricting a lifting motion of a lift for a wheelchair and a standing state and a lodging state of a slope or a bridge.SOLUTION: A lifting part is arranged on both right and left sides of a table of a lift for a wheelchair and a safety device constituted of a plurality of linkages is provided for operating simultaneously an operation of an open state and a closed state of a blockage bar bearing pivotably to an end of the blockage bar, and an operation of a standing state and a lodging state of a slope and a bridge bearing pivotably to front and rear both ends of the table. The safety device of a slope side is provided with an opening and closing locking mechanism for restricting an operation of the safety device to operate only at the lowest position by interlocking to a lifting of the table.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a safety device in a wheelchair elevator.

In recent years, with the spread of wheelchair elevators, it is possible to reduce the effort and time for wheelchair users (hereinafter referred to as users) to move long slopes from low to high positions such as entrances of houses by relying on their own arm strength. It has become.
In addition, for people who assist users (hereinafter referred to as assistants), expenses such as burden reduction of physical strength such as holding the user to move the user from outdoors to indoors and elimination of the need to repair the house in a slope manner are eliminated. It also reduces the burden on the side.

  However, as a problem when using the wheelchair elevator, there is a risk that the user or a caring person accidentally falls the table of the wheelchair elevator at the highest position or during lifting.

Therefore, the elevator for wheelchairs of Patent Document 1 includes a pair of guard pipes serving as a fall prevention fence above the table, and a blocking rod rotatably attached to one of the guard pipes at both ends of the guard pipe. ing.
When the shutoff bar is in a released state (a state in which the wheelchair can be passed), the table can not be moved up and down.
In addition, by setting the slope for bridging the movement from the floor surface of the wheelchair or the upper surface of the step to the table in accordance with the elevation of the table, the wheel stopper of the wheelchair is used.
In addition, it comprises with a link mechanism so that slope can be laid down by operating a blocking bar.

That is, the elevator for a wheelchair disclosed in Patent Document 1 can be used safely by, for example, enclosing the four sides of the table on which the wheelchair rides with a safety device and preventing a fall from the table.
Furthermore, when the blocking rod is released (the wheelchair can pass through), the table can not be moved up and down, so the wheelchair elevator will not operate if the four sides are not surrounded by a safety device, so it can be used safely. be able to.
In addition, since the slope has a wheel stopper function, the blocking bar can be installed at a high position, and the slope can use the wheelchair more safely because the blocking bar surrounds the user. There is.

Patent No. 4604256

However, in the elevator for wheelchairs disclosed in Patent Document 1, the table can be moved up and down only when the blocking bar and the slope function as a safety fence, but the user or assistance is possible regardless of the elevation position of the table. A person can open and close the blocking bar.
That is, in the configuration of Patent Document 1, there is a risk that the blocking rod may fall by mistake if the blocking rod is released at a certain height.
In addition, since the slope is automatically bridged when the table reaches the highest or lowest position, there is a risk of injury, such as the wheelchair starting suddenly when the user forgets to brake the wheelchair and the user falls. The

  Therefore, the problem to be solved by the present invention is to provide a blocking bar for preventing the user from falling off the table, and depending on the state of the blocking bar, lifting and lowering operation of the wheelchair elevator and erecting the slope or bridge. To provide a wheelchair elevator with higher safety by limiting the state and the state of lodging.

The wheelchair lift according to the present invention is a wheelchair lift configured to be capable of moving up and down a table having a size that allows the wheelchair to board and pass through, and elevating units for supporting the table are disposed on both left and right sides in the boarding direction. One end of the blocking rod is rotatably supported on the front and rear end edges of one of the lifting and lowering portions, and the other end of the blocking rod is locked on the front and rear end edges of the other lifting and lowering portion. And the open state can be appropriately operated, the slope and the bridge are rotatably supported at the front and rear end edges of the table, and the first and the rear end edges are rotatably supported in the vicinity of the lower end of either one A link, one end to the first link, a second link pivotally supported at the other end to the slope and the bridge, the other end to the first link, and one end to the blocking rod A blocking rod rod rotatably supported, and the elevating part An open / close lever pivotally supported at one end, a lever support plate fixed at a substantially intermediate position of the open / close lever, one end to the lever support plate, and the other end to the first link By providing the safety device constituted by the third link pivotally supported, by operating the blocking rod or the opening / closing lever, the first link is rotated by the blocking rod rod and interlocked with the first link The second link and the third link rotate to configure the slope and the upright state and the fallen state of the slope and the bridge so as to simultaneously operate the shutoff state and the open state of the shutoff rod, and A stepped shaft slidably supported vertically in the lower frame of the elevating part, a lock member vertically supported in the stepped shaft, and between the locking member and the upper frame of the elevating part On the elastic body disposed on In the lowest position of the table, the stepped shaft interferes with the base frame so that it is relatively against the lower frame against the force of the elastic body. Ascending and releasing the restriction on the rotation of the restriction plate fixed to the shaft member of the third link, the operation of the blocking bar or the opening / closing lever on the slope side is enabled, and the table is the slope side other than the lowest position It is characterized in that the operation of the shutoff rod or the opening / closing lever of the
The opening and closing lever is disposed on the side of the table of the elevating unit, so that the user can operate the opening and closing lever in a state of being on the table.
Further, an emergency lowering lever rotatably attached to the inside of the elevating part, a lever plate attached so as to be rotated along with the rotation of the emergency lowering lever, and one end of the lever plate can be turned An emergency lowering rod, the other end of which is anchored to the end of the actuating plate whose other end is fixed to the connecting frame of the elevator, and a male screw telescopically adjustably mounted on the actuating plate; An emergency lowering device constituted by an operating unit disposed at one end of a drive for raising and lowering the table rotates the emergency lowering lever to bend the operating plate by the emergency lowering rod. The table can be lowered from the raised position by releasing braking of the drive device by pressing the actuating portion by the male screw attached to the actuating plate. There.
Further, by arranging the connecting rod at the upper end of the stepped shaft so as to be able to abut on the lever plate, one end of the stepped shaft is in the vicinity of the lowest position at the time of emergency descent. By interfering with the base frame, the connecting rod is raised relative to the lower frame against the force of the elastic body, and the connecting rod is also raised, and it abuts against the lever plate to forcibly return the rotation. This is characterized in that the braking of the drive device is restored to apply the brake.

The wheelchair elevator according to the present invention uses the wheelchair elevator because it is equipped with a safety device that can operate the blocking state and the opening state of the blocking bar and simultaneously operate the standing state and the lying state of the slope and the bridge. Operation can be reduced. In addition, since it can not be used unless the four sides are always enclosed, it can be used with confidence when moving up and down. And by having the opening and closing lock mechanism so that the operation of the blocking bar or the opening and closing lever can be operated only at the lowest position in order to fall the slope, the user operates the blocking bar or the opening and closing lever while moving up and down. By doing this, the blocking bar or the slope is opened, and it is possible to prevent the user from falling accidentally from the table. Furthermore, since the elastic body is not used for the member which comprises a safety device, since the rattling by deformation | transformation of a member can be suppressed, it can be used safely. In addition, since it is not necessary to consider the deformation due to the elastic body being repeatedly subjected to a load when used for a long time, etc., the maintainability can be improved.
And, by arranging the opening and closing lever inside the elevating part, it becomes possible to change the posture of the blocking rod, slope and bridge while the user gets on the table, so that the user leans forward from the wheelchair And the user can not fall from the wheelchair.
And, by providing the emergency descent device for lowering the table from the elevation position without using the power of the driving device, even if a natural disaster such as an earthquake or a fire occurs, it is possible to use indoors without using the power. Since it is possible to escape from the user to the outdoors, it is possible to prevent the user from being left behind in the building and being in danger of life.
Since the emergency lowering device and the opening / closing lock mechanism are interlocked with each other, the braking mechanism of the emergency lowering device operates immediately before the table is lowered to the lowest position by the emergency lowering device. By striking the base frame well, the impact (breakage) of the structural member can be eliminated, so that it can be used safely. In addition, it is possible to suppress the impact of the user on the table and it is very safe.

FIG. 1 is a front view of the lowermost state showing the entire elevator for a wheelchair 1 FIG. 2 is a front view in the highest position showing the entire wheelchair elevator 1 FIG. 3 is a plan view in the lowest state showing the entire elevator for a wheelchair 1 FIG. 4 is an explanatory view showing the relationship between the support 3 of the elevator 1 for a wheelchair, the elevating unit 4 and the driving unit 6 FIG. 5 is an explanatory view showing the blocking state of the blocking bar 71 of the wheelchair elevator 1 and the standing state of the slope 8 FIG. 6 is an explanatory view showing the state of the safety device 7 and the slope 8 during the opening state by operating the blocking bar 71 of the wheelchair elevator 1 FIG. 7 is an explanatory view showing a state in which the blocking bar 71 of the elevator 1 for a wheelchair is in the open state and the state of getting on and off the slope 8. FIG. 8 is an explanatory view showing a state in which the opening and closing lock mechanism 10 of the wheelchair lift 1 makes the opening and closing lever 73 inoperable. FIG. 9 is an explanatory view showing a state where the open / close lock mechanism 10 of the wheelchair lift 1 enables the open / close lever 73 to be operated. FIG. 10 is an explanatory view showing the relationship between the open / close lock mechanism 10 and the emergency lowering device 11 when the emergency lowering lever 111 is operated at the highest position of the wheelchair elevator 1 FIG. 11 is an explanatory view of the actuating portion 113 of the emergency lowering device, wherein (a) the emergency lowering lever 111 is not operated (b) the emergency lowering lever 111 is operated FIG. 12 is an explanatory view showing the relationship between the key 114 and the emergency lowering lever 111, where (a) the key 114 is used as a power switch, and (b) is used to operate the emergency lowering lever 111.

Hereinafter, the wheelchair lift 1 of the present invention will be described based on the drawings.
The wheelchair elevator 1 mainly includes a base frame 2 which is mainly in contact with the ground, columns 3, 3, ... erected on the base frame 2, and vertical columns 3, 3 and so on. And the table 5 attached to the elevator 4 so that the wheelchair can ride and pass through, and the elevator 4 to move up and down along the columns 3, 3,. The drive unit 6 and the safety device 7 for preventing the user from falling from the table 5 are configured. (See Figures 1 to 3)
In the following description, the upper limit position and the lower limit position will be used, which are the heights of the upper limit and the lower limit of the table 5.

First, the base frame 2 will be described.
Although not shown, the base frame 2 is formed in a rectangular shape in a plan view by arranging and securing twinkling frames in the vicinity of both ends of the side frames spaced apart by a constant distance.
And, at the four corners of the base frame 2, supports 3, 3, ... are mounted upright.
In addition, although illustration is abbreviate | omitted, the nut is being fixed to the four corners of the base frame 2, and it can expand-contract in the up-down direction by screwing an adjuster bolt to this nut.
A gap with the uneven ground can be filled with this adjuster bolt, and a more stable installation of the wheelchair elevator 1 can be performed.

Next, the elevating parts 4, 4 mounted so as to be vertically movable along the columns 3, 3, ... will be described.
The elevators 4, 4 are disposed in pairs on the left and right with respect to the direction of travel of the user.
The elevating part 4 is a connecting frame 4b, 4b for connecting the pair of elevating frames 4a, 4a, ... that can be externally fitted to the columns 3, 3, ... with the elevating frames 4a, 4a, ... Mainly composed of
Sluice 31, 31,... Are disposed at the upper end and the lower end of the columns 3, 3,. By reducing the gap between the columns 3, 3, ... and the elevating frames 4a, 4a, ... by this slide 31, 31, ..., it is possible to reduce rattling and to reduce the shaking at the time of lifting and lowering. ing.
And although details will be described later, as shown in FIG. 4, a plurality of pulleys 4c, 4c are disposed inside the lifting and lowering unit 4, the lifting and lowering units 4, 4 configured in this way are columns 3, 3,. The elevating frames 4a, 4a,... Are inserted into the columns 3, 3,.

Next, the drive units 6 and 6 for raising and lowering the elevation units 4 and 4 will be described.
The drive units 6, 6 are disposed in the rectangular covers 61, 61, and are erected between the elevating frames 4a, 4a, and are disposed at substantially intermediate positions in plan view in the covers 61, 61. 6a, 6a, and pulleys 6c, 6c, 6c, 6c, 6a, 6a, 6a, 6a, 6a, 6a, 6a, 6a, which are vertically movable by forward and reverse rotation of the screw axes 6a, 6a. The screw members 6b and 6b provided with ..., and a drive device 6d such as a motor connected to one of the screw shafts 6a and rotationally driving the screw shaft 6a.
The screw shaft 6a on the side not connected to the drive device 6d has one end rotatably mounted on a frame (not shown) in the cover 61, 61.
Although not shown, the other end of the screw shafts 6a and 6a has a bevel gear fixed thereto, and a rod member having a bevel gear fixed at both ends below the table 5 described later is screwed to the elevating portion Synchronized 4,4.
Then, one end is fixed to the upper frame 4k of the elevation unit 4, 4 and wound around the pulleys 6c, 6c, ... and the pulleys 4c, 4c, ... of the elevation unit 4, 4, Wires 6e and 6e are disposed so as to fasten the other end to the upper end of 3. (See Figure 4)
In the drive units 6 and 6 configured in this way, when the drive device 6 d is driven, the screw shaft 6 a on the side where the drive device 6 d is disposed rotates and the other synchronized screw shaft 6 a rotates. The elevating part 4 connected to the columns 3 by the wires 6e and 6e by configuring the screwing members 6b and 6b screwed to the screw shafts 6a and 6a to move in one of the upper and lower directions. , 4 can move up and down along the columns 3, 3,... Along with the movement of the screwing members 6b, 6b.

A table 5 is attached to the elevating parts 4 so as to be located above the base frame 2.
In the table 5, a rectangular table frame 51 is disposed inside the elevators 4 and 5 in plan view, and the elevators 4 and 4 are connected to the left and right of the table frame 51 in the traveling direction of the wheelchair. The table plate 52 is fixed on the table frame 51.
Further, substantially U-shaped hooks 53, 53,... Are fixed to the four corners of the table frame 51 at both ends.
The table 5 has at least a size that allows a wheelchair to ride.

The slope 8 and the bridge 9 are pivotally connected to the front and rear end edges of the table 5 in a pivotable manner.
(In the present embodiment, the side that rides the elevator 1 for wheelchairs from the outside etc. is the slope 8, and the side that rides the elevator 1 for the wheelchair from a step such as indoors is the bridge 9).
Although the slope 8 and the bridge 9 will be described later, the slope 8 and the bridge 9 can be turned on and off at the lower limit position of the table 5 at the lower limit position and between the lower limit position and the upper limit position. When it is positioned (during lifting and lowering), the slope 8 and the bridge 9 keep standing and function as a wheel stopper of the wheelchair, and when the table 5 reaches the upper limit position, the bridge 9 can rotate downward Thus, it becomes possible to get down from the wheelchair lift 1 by being in a state of being bridged with the upper part such as a step.

Next, the safety devices 7 and 7 will be described.
The safety devices 7, 7 are connected to the blocking rods 71, 71 rotatably mounted on one of the elevators 4 and the blocking rods 71, 71 so that the slope 8 and the bridge 9 stand up and fall. The link mechanisms 72 and 72 interlockably switchable, the blocking rods 71 and 71, the slope 8 and the opening / closing levers 73 for the user to open / close the bridge 9 on the table 5 are mainly configured.
In the present embodiment, as shown in FIGS. 5 to 7, the safety device 7 on the slope 8 side will be described. (The safety device 7 on the bridge 9 side is left-right symmetric with the slope 8 side in plan view and is therefore omitted.)

First, the blocking bar 71 will be described.
The blocking rod 71 is rotatably attached to a fulcrum plate 4 d fixed at one end thereof to the elevating frame 4 a of one of the elevating parts 4 of the elevating part 4, and the other end is the elevating frame of the other elevating part 4 A lock bar support plate 4e (shown) fixed to 4a is locked.
Further, a connecting plate 711 is fixed to one end of the blocking rod 71, and a blocking rod rod 724 of a link mechanism 72 described later is rotatably attached to one end of the connecting plate 711.

Next, the link mechanism 72 will be described.
The link mechanism 72 rotatably pivots a first link 721 to a link support plate 4f fixed to one end near the lower end of the elevating frame 4a, and a second link connected to the slope 8 at the first link 721 Reference numeral 722, a third link 723 connected to the opening / closing lever 73, and a rod 72 d connected to the blocking rod 71 are each pivotally attached and configured mainly.
First, the first link 721 is pivotally attached at one end thereof to the link support plate 4 f of the elevating unit 4.
The first link 721 is composed of a plate formed in a substantially U-shape.
The second link 722 is pivotally attached at one end to the first link 721 and at the other end to one end of a support plate 822 described later.
The second link 722 is formed of a plate formed in a substantially H-shaped U-shape.
The third link 723 has one end pivotally attached to the first link 721 and the other end pivotably to a lever support plate 735 of an opening / closing lever 73 described later.
Further, one end of the blocking rod 724 is pivotally attached to the first link 721 so as to be rotatable.

Next, the opening and closing lever 73 will be described.
The opening and closing lever 73 mainly comprises an opening and closing lever main body 731 operated by the user, and the opening and closing lever main body 731 pivotally supported by the elevating unit 4 via a restriction plate 732.
First, the opening / closing lever main body 731 is formed in a rod shape bent and formed a plurality of times in this embodiment.
The shape of the opening / closing lever main body 731 may be any shape that is easy for the user to operate.
The shaft member 733 is fixed to the tip of the opening / closing lever main body 731.
A restricting plate 732 in which a male screw 734 is screwed on the shaft member 733 is fixedly inserted through the shaft member 733.
Then, by inserting the shaft member 733 into the boss member 4 h of the elevating unit 4 and pivotally attaching the shaft member 733, the opening / closing lever 73 is made rotatable.
Next, the lever support plate 735 is fixed at a position slightly lower than the middle position of the opening / closing lever main body 731.
One end of the third link 723 is rotatably attached to the lever support plate 735.

Next, the slope 8 will be described.
The slope 8 mainly includes a slope main body 81 and a slope support frame 82 which supports the slope main body 81 and is rotatably engaged with the hooks 53 of the table 5.
First, the slope main body 81 uses a thin metal plate in this embodiment, and both ends thereof are bent to form a wheel stopper at the time of boarding a wheelchair.
The slope support frame 82 is bent in a substantially U shape in a front view, and supporting plates 822, 822 are fixed to both ends of a frame 821 having substantially the same length as the short side of the table 5 in a plan view. The support shafts 823 823 are fixed to 822 822.
The slope 8 configured in this way is locked to the hooks 53 and 53 of the table 5 and then fixed to the table frame 51 by the table plate 52 so that the hooks 53 and 53 can be freely pivoted while being detached. It is composed of

Next, a state where the blocking rod 71 is in the blocking state, the slope 8 is in the rising state, the blocking rod 71 is in the opening state, and the slope 8 is in the getting on / off state will be described.
FIG. 5 shows the slope 8 in the upright state with the blocking rod 71 in the blocking state.
From this state, when the blocking rod 71 or the opening / closing lever 73 is opened, the blocking rod rod 724 connected to the blocking rod 71 is pulled down obliquely downward in front view.
Then, the first link 721 rotates counterclockwise in a front view with the link support plate 4 f as the rotation center.
At the same time, the second link 722 and the third link 723 also pivot, but the pivoting center is the link support plate 4f, and the slope 8 can not be opened and remains upright.
This is because the connecting portion between the first link 721 and the second link 722 is located on the elevation frame 4 a side with respect to the connecting portion of the link support plate 4 f between FIG. 5 and FIG. This is because the second link 722 connected to the slope 8 is not turned because the force does not act.

Then, when the release operation proceeds from the state of FIG. 5, as shown in FIG. 6, the connecting portion of each link of the link mechanism 72 is disposed on the link support plate 4f in a substantially straight line.
In this state, the positions of the fulcrums of the links are balanced, and the centers of gravity of the constituent members are balanced.

When the opening operation further proceeds from this state, the connection portion between the first link 721 and the second link 722 moves outward beyond the link support plate 4 f to cross the fulcrum.
Then, the support shafts 823 and 823 of the slope 8 become rotation centers, and the second link 722 and the support plates 822 and 822 of the slope 8 rotate so as to lie down.

In the safety device 7 configured in this manner, when the slope 8 moves from the upright state to the fallen state, the blocking rod 71 or the opening / closing lever 73 is opened and the second link 722 of the link mechanism 7 does not exceed the fulcrum. It is configured not to open.
That is, the slope 8 does not fall even if a force is applied to open the slope 8 due to contact of the wheels of a wheelchair, etc., and it can be used more safely.
Further, since the configuration does not use an elastic body such as a spring, it is not necessary to consider permanent deformation due to an external force of the elastic body or natural deformation due to aged deterioration, and maintenance performance and durability can be improved.
In addition, since the first link 721 is U-shaped bent-formed, the fastening member used when connecting with other parts can be arranged and concealed inside the U-shaped plate, and the user and the wheelchair can It is possible to prevent injury or damage due to being caught by the fastening member.

Next, the open / close lock mechanism 10 will be described.
The open / close lock mechanism 10 is disposed inside the elevating unit 4.
First, the small diameter portion 101b is inserted so that the lower end of the large diameter portion 101a of the stepped shaft 101 can be locked to the upper end of the hole drilled in the lower frame 4g of the elevation unit 4.
The small diameter portion 101b of the stepped shaft 101 penetrates the lower frame 4g to project downward from the elevation unit 4, and is configured to abut on the base frame 2 at the lowest position.
Then, the lock member 102 is attached to the large diameter portion 101 a of the stepped shaft 101 so as to project in the vertical direction toward the screw shaft 6 a.
Then, the elastic body 103 is inserted outside the stepped shaft 101 so as to be disposed on the lock member 102 in a front view.
The elastic body 103 in this embodiment utilizes a compression spring.
An emergency lowering rod 112 of the emergency lowering device 11 described later is adjustably mounted on the upper end of the large diameter portion 101 a of the stepped shaft 101.

The function of the open / close lock mechanism 10 configured as described above will be described with reference to FIGS. 8 and 9.
In FIG. 8, the blocking bar 71 is in the blocking state at the highest position. And FIG. 9 is a state in which the blocking bar 71 can be opened and closed at the lowest position.
First, as shown in FIG. 8, when the blocking rod 71 is in the blocking state, one end of the small diameter portion 101 b of the stepped shaft 101 abuts on the base frame 2 to resist the elastic body 103 and thereby raise the stepped shaft. At the same time as 101 slides upward, the lock member 102 also moves upward.
Then, the engagement between the opening and closing lever 73 and the male screw 734 is released, whereby the opening and closing lever 73 can be turned.
When the blocking rod 71 is in the open state, one end of the restriction plate 732 is separated from the energizing switch 4i for conduction with the power switch 6f of the lifting unit 4, so that the wheelchair elevator 1 can not be driven. I have to.
Next, as shown in FIG. 9, when the blocking rod 71 is in the blocking state (during lifting or highest position), the large diameter portion 101a is engaged with the upper surface of the lower frame 4g by its own weight. In addition, the biasing force of the elastic body 103 acts, and the lock member 102 can be fixed more firmly.
Then, when the male screw 734 of the opening and closing lever 73 is engaged, the opening and closing lever 73 can not be operated.
When the blocking rod 71 is in the blocking state, the wheelchair elevator 1 can be driven by bringing one end of the regulating plate 732 into contact with the energizing switch 4i of the elevating unit 4 to energize it.
The open / close lock mechanism 10 configured in this manner is configured such that the shutoff rod 71 and the slope 8 can not be opened or closed unless the locking mechanism 10 is at the lowest position.
That is, since the blocking bar 71 and the slope 8 can not be opened and closed except at the lowest position, the user is prevented from falling by accidentally opening the blocking bar 71 at the time of raising and lowering.

Next, the emergency lowering device 11 will be described.
The emergency lowering device 11 mainly includes an emergency lowering lever 111 disposed on the cover 61 of the drive unit 6, an emergency lowering rod 112 acting on the emergency lowering lever 111, and an operation unit 113.

First, as shown in FIG. 11, the operating unit 113 will be described.
The actuating portion 113 utilizes a brake mechanism provided at the rear end portion of the motor which is the drive device 6 d.
More specifically, when the brake mechanism is not energized, the front brake plate 113a provided on the main body side of the drive device 6d is interlocked with the rotary shaft 113c by the spring 113b and then crimped to the brake plate 113d to restrain rotation of the rotary shaft 113c. By applying electricity, an electromagnetic force is generated, and the front brake plate 113a is pulled against the spring 113b toward the main body, separated from the rear brake plate 113d, and then interlocked with the brake plate 113a. The rotating shaft 113c can freely rotate.
By utilizing this mechanism, the brake can be forcibly released at the time of non-energization.
In addition, in order to cause the rear brake plate 113d to act, a circular action plate 113e substantially equal to the outer diameter of the drive device 6d is fixed to the rear brake plate 113d.
Then, the operation plate 4j formed in a substantially L shape in a front view is fixed to the connection frame 4b of the elevating unit 4.
Then, an extendable and adjustable male screw 113f is attached to a substantially central portion of the side of the operation plate 4j not fixed to the connection frame 4b.
When the male screw 113f is operated, the action plate 113e is pressed, and the rear brake plate 113d fixed to the action plate 113e is pressed.
Then, one end of the emergency lowering rod 112 is locked in a hole formed at the tip of the operation plate 4j.
The other end of the emergency lowering rod 112 is fixed to a lever plate 111 a attached to the emergency lowering lever 111.

The function of the emergency lowering device 11 configured as described above will be described using FIGS. 8 and 10.
FIG. 8 shows that the table 5 is at the highest position and the emergency lowering device 11 is not operating.
In this state, since the emergency lowering lever 111 is not operated, each component does not move.
That is, since the male screw 113f does not come in contact with the action plate 113e, the rotation of the rotation shaft 113c of the lifting mechanism 6c is not restricted, so the table 5 can not be lowered.
Next, FIG. 10 shows the state in which the emergency lowering device 11 is operated with the table 5 at the highest position.
In this state, by turning the emergency lowering lever 111, the lever plate 111a attached to the emergency lowering lever 111 and pivotable is turned.
Then, at the same time as the emergency lowering rod 112 fixed to the lever plate 111a is pulled downward, the actuating plate 4j is also drawn downward, and the male screw 113f attached to the actuating plate 4j moves downward.
Then, when the male screw 113 f moved downward presses the action plate 113 e of the actuating portion 113, the rear brake plate 113 d operates to release the rotation of the rotation shaft 113 c.
Then, when the rotational shaft 113c is rotated by receiving a load such as the weight of the structural member or the user at the highest position, the screw shaft 6a connected to the rotational shaft 113c is moved downward, and the table 5 Can be lowered.
In addition, although the case where the emergency lowering device 11 in the highest position was operated was demonstrated in FIG. 10, if it is not the lowest position, each component works the same regardless of which rising position.

Then, in order to activate the emergency lowering device 11, a key 114 serving as a power source of the wheelchair elevator is used.
This key 114 has a shape that can be inserted into the head of the emergency lowering lever 111, as shown in FIG. 12 (b). (D shape in this embodiment)
Then, the emergency lowering device 11 is activated by rotating the key 114 inserted into the emergency lowering lever 111.
The configuration in which the key 114 and the emergency lowering lever 111 are combined is for tamper resistance that prevents the emergency lowering device 11 from being easily operated.
In this embodiment, the cost is reduced by using one key 114 for turning on the main power supply and operating the emergency lowering lever 111, but the illustration of the emergency lowering lever 111 is omitted. A hole may be bored in the hole so that the pin member can be inserted and operated.

Further, in the present embodiment, the open / close lock mechanism 10 and the emergency lowering device 11 are disposed only on the slope 8 side.
This is because, as shown in FIG. 2 and the like, it is assumed that the bridge 9 side passes through the wall surface of the step when moving up and down and there is no concern of the user falling down and that it is not used as an evacuation route.
In addition, when there is no structure such as a house which becomes a wall surface at the time of ascent and descent on the bridge 9 side, the shutoff rod at the time of ascent and descent is provided by arranging the open / close lock mechanism 10 and the emergency lowering device 11 in symmetrical positions with the slope 8 side. 71 and the opening and closing of the bridge 9 can be regulated.
That is, the user can arbitrarily set the emergency lowering device 11 according to the use environment.

Further, the emergency lowering device 11 and the open / close lock mechanism 10 can be configured to interlock with each other.
More specifically, the connecting rod 104 is attached to the upper end of the stepped shaft 101 of the opening and closing lock mechanism 10 so as to be in contact with the lever plate 111 a of the emergency lowering device 11 when the lever plate 111 a is rotated.
With this configuration, the lever plate 111a of the emergency lowering device 11 and the connecting rod 104 are spaced apart from each other by a constant distance (FIG. 8) during the highest position or the ascending position.
Then, at the lowest position or near the lowest position, the lever plate 111a of the emergency lowering device 11 is pressed from the bottom to the top in a front view (FIG. 9).
That is, when the table 5 is lowered and lowered to near the lowest position, the stepped shaft 101 slides upward by contacting the base frame 2 as described above, and is attached to one end of the stepped shaft 101. The connecting rod 104 pushes the emergency lowering rod 112 upward.
Then, one end of the emergency lowering rod 112 fixed to the lever plate 111a separates from the operating plate 4j and the locking relationship is cancelled, and the male screw 113f attached to the operating plate 4j and the operating plate 113e separate. Thus, the rotation of the rotation shaft 113c is restrained.
That is, when the table 5 arrives near the lowest position, the impact on the structural member can be eliminated when the table 5 is automatically lowered to the lowest position when the structural member descends, thereby preventing the product from being damaged. can do.
Further, since the open / close lock mechanism 10 is configured to have the automatic braking function of the emergency lowering device 11, it can be manufactured at a lower cost than when the member of the automatic brake is exclusively used for the emergency lowering device 11.
Furthermore, since the blocking rod 71, the slope 8, and the bridge 9 can be opened and closed in the same manner as in normal lifting and lowering even during emergency descent, the user can operate without losing control of the operation method.

Next, a method of using the wheelchair lift 1 at normal times will be described.
(1) The user moves in a wheelchair in front of the slope 8 of the wheelchair elevator 1.
(2) The blocking rod 71 on the side of the slope 8 is flipped up to open it. At this time, at the same time, the slope 8 falls down.
(3) The user board the table. At this time, the wheelchair brakes.
(4) The opening / closing lever 73 (or the blocking rod 71) on the side of the slope 8 is operated to place the blocking rod 71 in the blocking state and the slope 8 in the standing state.
(5) Operate the lift switch to raise the table 5 to the highest position.
(6) The opening / closing lever 73 (or the blocking rod 71) on the bridge 9 side is operated to open the blocking rod 71 and simultaneously to bridge the bridge 9.
(7) Release the brakes of the wheelchair, take off the wheelchair from the table 5 and get down to the destination.

Next, a method of escaping outside from a step such as indoors when the drive device 6d of the wheelchair elevator 1 can not be driven, for example, when a power failure occurs due to an unexpected situation such as an earthquake, will be described.
A description will be given from the state where the user or the assistant board the table 5.
(1) Remove the key 114 from the power supply, and fit the key 114 on the emergency lowering lever 111.
(2) The emergency lowering lever 111 is turned by the key 114.
The lowering speed can be decreased by repeating the turning operation intermittently without repeating the turning operation, and the impact at the time of reaching the lowest position can be artificially reduced.
(3) Each component descends and the table 5 descends to the lowest position.
(4) Operate the opening / closing lever 73 (or the blocking rod 71) of the slope 8 to open the blocking rod 71, make the slope 8 available for getting on and off, release the wheel brakes of the wheelchair, and start the wheelchair from the table 5. And escape outdoors.

The wheelchair elevator of the present invention has the following effects.
(1) By providing the safety device 7 capable of simultaneously opening and closing the blocking rod 71, the slope 8 and the bridge 9, the operation when using the wheelchair elevator 1 can be reduced, and the table 5 can be shortened in a short time. You can board the
(2) The safety device 7 is provided with a play so that the blocking rod 71 and the slope 8 and the bridge 9 do not change their postures to the fallen state and the upright state if the blocking rod 71 or the opening / closing lever 73 is not operated at a constant interval. It is safe because the slope 8 and the bridge 9 do not open unexpectedly by the contact of the wheels.
(3) Since the members of the link mechanism 72 constituting the safety device 7 do not use an elastic body such as a spring, the wheel in the upright state of the slope 8 and the bridge 9 is not affected by the elongation of the elastic body. When stopping, it can hold the wheel of the wheelchair firmly because rattling does not occur. That is, the user can be given a sense of security.
(4) The blocking rod 71 or the opening / closing lever 73 can only be released at the lowest position or the highest position, so the slope 8 and the bridge 9 do not fall down and get on / off at the time of raising and lowering. Even if there is an unexpected operation due to such as, it is possible to prevent the fall of the user.
(5) The opening / closing lock mechanism 10 can not drive the wheelchair lift 1 when the blocking bar is in the open state, that is, drives the wheelchair lift 1 unless the four sides are surrounded and the safety state is established. Because there is no risk of accidental fall of the user due to malfunction.
(6) Even if the open / close lock mechanism 10 is interlocked with the emergency lowering device 11 and the emergency lowering lever 111 continues to operate, the open / close lock occurs when the elevator 4 and the table 5 reach the lowest position. The mechanism 10 ascends by coming into contact with the base frame 2 and releases the operation of the emergency lowering device 11, whereby the brake mechanism of the drive device 6d is activated to decelerate the structural members such as the elevating part 4 and the table 5 It is possible not to generate an impact.
(7) By arranging the opening and closing levers 73 and 73 so as to be located on the side of the wheelchair, opening and closing the blocking rods 71 and 71, the slope 8, and the bridge 9 by operating the opening and closing levers 73 and 73 in the front and rear direction Because it can, it can operate without becoming an unreasonable posture (front inclination posture etc.). That is, it is possible to eliminate the risk of the user falling from the wheelchair or falling.

In the present embodiment, as shown in FIG. 3, the pair of elevators 4 and 4 are arranged in parallel.
This is to reduce the vibration in the front, rear, left, and right directions by inserting the rectangular frames 4a, 4a, ... of the elevators 4, 4 into the columns 3, 3, ... arranged at the four corners of the base frame. However, other configurations of the lifting unit can also be used.
For example, it is possible to use a cantilever type configuration in which the elevating unit is vertically movably disposed along the support column erected near the approximate center of any one side of the base frame.
In this case, the safety device can be configured by erecting a pair of guard members on the table and rotatably attaching the blocking rod to any one of the guard members. (See Patent Document 1)
That is, regardless of the configuration of the elevating part that supports the table, the safety device and the open / close lock mechanism can be configured.

Reference Signs List 1 wheelchair elevator 2 base frame 3 support 4 elevator 5 table 6 drive 7 safety device 71 shutoff bar 72 link mechanism 73 opening / closing lever 8 slope 9 bridge 10 opening / closing lock mechanism 11 emergency lowering device

Claims (4)

  In a wheelchair elevator configured to be capable of moving up and down a table capable of boarding and passing a wheelchair up and down, elevating units for supporting the table are disposed on both the left and right sides of the boarding direction, One end of the blocking rod is rotatably supported at the end edge portion, and the other end of the blocking rod is locked to the front and rear end edge portions of the other elevating part, so that the blocking state and the open state can be appropriately operated. A first link pivotally supported by a slope and a bridge rotatably on the front and rear end edges of the table and rotatably supported in the vicinity of the lower end of any one of the front and rear end edges; A second link pivotally supported at one end and the other end to the slope and the bridge, and a cutoff pivotally supported at the other end to the first link and the other end to the first link A rod and one end of the rod are rotatably supported at one end thereof A closing lever, a lever supporting plate fixed at a substantially intermediate position of the opening / closing lever, and a third link pivotally supported at one end on the lever supporting plate and at the other end on the first link. The second link and the third link in which the first link is pivoted by the blocking rod or rod and operated in conjunction with the first link by operating the blocking rod or the opening / closing lever. In the vertical direction of the lower frame of the elevating unit, the slope and the rising and falling states of the slope and the bridge can be simultaneously operated by rotating the slope and the bridge. A stepped shaft slidably supported on the shaft, a lock member vertically supported on the stepped shaft, and an elastic body disposed between the lock member and the upper frame of the elevating unit. Open and close lock By providing the frame, the stepped shaft interferes with the base frame when the table is at the lowest position, so that it rises relative to the lower frame against the force of the elastic body, and the third link By releasing the restriction on the rotation of the restriction plate fixed to the shaft member, operation of the blocking bar or the opening / closing lever on the slope side becomes possible, and except for the lowest position of the table, the blocking bar or the opening / closing lever on the slope side A wheelchair elevator characterized in that the operation is impossible.   The wheelchair according to claim 1, characterized in that the opening and closing lever is arranged on the table side of the elevating unit so that the user can operate the opening and closing lever in a state where the user is on the table. Elevator.   An emergency lowering lever rotatably attached to the inside of the elevating unit, a lever plate attached so as to be rotated along with the rotation of the emergency lowering lever, and an axis pivoting one end of the lever plate An emergency lowering rod supported at the other end of the working plate whose other end is fixed to the end of the working plate whose one end is fixed to the connecting frame of the elevator, a male screw telescopically adjustably mounted on the working plate, and the table The emergency lowering device constituted by an operating unit disposed at one end of a drive for raising and lowering the lower arm rotates the emergency lowering lever, whereby the operating plate is bent by the emergency lowering rod, The table can be lowered from the raised position by releasing the braking of the drive by pressing the actuating portion by the male screw attached to the actuating plate. 1 or wheelchair lift according to claim 2.   A connecting rod is disposed at the upper end of the stepped shaft so as to be able to abut on the lever plate, so that one end of the stepped shaft is the base when the table reaches near the lowest position during emergency lowering. By interfering with the frame, the connecting rod is also raised relative to the lower frame against the force of the elastic body, and the connecting rod is also raised to abut the lever plate to forcibly return the rotation. The wheelchair elevator according to claim 3, characterized in that the braking of the drive device is restored to the original state.