JP4824329B2 - Rail fall prevention device for folding guide rail of stair lift - Google Patents

Description

The present invention relates to a stair lift that has guide rails installed along the longitudinal direction of a stair and moves up and down to an upper floor such as the second floor by placing a handicapped person or an elderly person, and in particular, a manual folding guide. The present invention relates to a rail fall prevention device for a rail.

A stair lift that is not a foldable guide rail generally includes a single guide rail 2 installed along the longitudinal direction on the side of the staircase 1, a rack 3 fixed to the guide rail 2, and a chair-shaped lift. A drive motor 5 disposed on the elevating body 4 and a pinion gear 7 that transmits torque from the drive motor 5 via the speed reducer 6 and meshes with the rack 3, and the pinion gear 7 is rotated by the rotation of the drive motor 5. The chair-shaped lifting body 4 is lifted and lowered by being engaged with the rack 3 while being guided by the guide rails 2 by the guide rollers 8a and 8b. However, if the guide rail 2 installed on the side of the staircase extends to the passage 9 and comes out, it will hit the foot or obstruct traffic.

In order to solve this problem, foldable guide rails described in Patent Document 1, Patent Document 2, and Patent Document 3 are known. The one described in Patent Document 1 is a slide rail type, and the end guide rail is lifted on one end and then lifted on the guide rail. Therefore, the end guide rail must be lifted on the guide rail in a low posture. Therefore, the burden on the operator is large, and there is only one stopper on the upper part, so if you release your hand, it will slide down to the lower side and may hit your foot and get injured. In the devices described in Patent Document 2 and Patent Document 3, the portion where the guide rail protrudes from the passage is electrically driven, and the entire guide rail is slid upward / converted into a rotating motion / tilting motion and folded. . Since this is also electrically driven, the structure becomes complicated and easily breaks down. If the gear is missing during sliding / tilting, the guide rail cannot be held in place, so it slides / or tilts as it is. You may get injured by hitting your feet.

JP 2001-226057 A JP 2003-128365 A Japanese Patent Laid-Open No. 2004-521846

Further, a foldable guide rail that divides into two near the lower floor 1a as shown in FIGS. 1 and 2 and pulls up the guide rail 2 by hand so as not to interfere with the passage 9 is also employed. Some racks use roller chains (not shown) instead of the racks 3. The folding guide rail 2 is provided with a connection holding device A. The connection holding device A includes a fulcrum plate 11a fixed to the lower end portion of the upper guide rail 10a and a lower guide rail 10b. A fulcrum plate 11b fixed to the upper end is rotatably mounted by a fulcrum shaft 12, and a stopper pin 14 is engaged with a stopper hole 13 in the upper guide rail 10a. The guide rail 10a and the lower guide rail 10b are connected and integrated.

Although there is a folding guide rail without the connection holding device A, the purpose of attaching this connection holding device is to create a step between the upper guide rail 10a and the lower guide rail 10b when used for many years. When the stair lift goes through that part, it feels the step, and it is attached to prevent the ride comfort from getting worse and to prevent the connecting part from being broken. Accordingly, the procedure for folding the folding guide rail with the connection holding device A will be described. In FIG. 3, in order to release the connection of the connection holding device A, the stopper pin 14 is provided with a compression spring 15. Since the stopper pin 14 is pushed by hand in the direction of the arrow to release the connection, the lever 16 provided at the lower end of the lower guide rail 10b is lifted by hand, The side guide rail 10b is rotated upward and folded on the upper side rail 10a.

As described above, the conventional folding guide rail 2 is folded by manually pressing the stopper pin 14 for releasing the connection between the upper guide rail 10a and the lower guide rail 10b sideways by hand. The lever 16 is pulled up and the lower guide rail 10b is rotated upward and folded. The foldable guide rail 2 without the connection holding device A is folded by simply pulling up the lever 16 by hand and rotating the lower guide rail 10b upward.

At this time, when a handicapped person, an elderly person or a woman pulls up, the lower guide rail 10b feels heavy, sometimes the lever 16 slides from the hand, and the lower guide rail 10b that has been lifted down. It is assumed that it will rotate and reach the floor.

Accordingly, in view of the above problems, the present invention provides a folding guide rail for a stair lift that prevents the lower guide rail lever from rotating downward even if the lever of the lower guide rail is separated from the hand. The purpose is to do.

In order to solve the above-mentioned problems, the invention of claim 1 is characterized in that a guide rail provided along an inclination of a staircase is moved up and down by operating a lifting body with an operation switch, and the guide rail is cut near the lower floor side. , connecting the fulcrum plate provided on top of the upper supporting point plate provided in the lower portion of the guide rail and lower guide rails rotatably with the fulcrum shaft, it is folded by rotating the subordinate side guide rails upward In the stair lift that can be
A lifting device having a lever for turning and folding the lower guide rail upward;
A connection holding device for connecting and holding the upper guide rail and the lower guide rail in a linear posture;
A connection device for connecting the connection holding device and the lifting device;
The coupling device to release said connection holding device via, a the lower guide can and the folding guide rails folding the rail by pulling the lever,
A stopper provided on the fulcrum plate of the upper guide rail, and a claw provided on the fulcrum plate of the lower guide rail and spring-biased to a locking position with the stopper. A fall prevention device is provided for preventing the folded lower guide rail from rotating downward by the locking of the claw,
The lever of the lifting device is integrally provided with a cam having a pair of protrusions on the peripheral surface, and when the lower guide rail is folded, one protrusion of the cam is moved along with the lifting operation of the lever. While the linkage holding device can be released by linking to the connecting device, after the lower guide rail is folded, the other projection of the cam is locked to the stopper provided in the lifting device, The lever can be held at a predetermined angle,
The claw of the fall prevention device is connected to the lever via the connecting device, and the claw is separated from the stopper simultaneously with the release of the connection holding device in accordance with the lifting operation of the lever .

With this configuration, pulling the lever on the lower guide rail with either hand releases the connection between the upper guide rail and the lower guide rail, and keeps the lower guide rail standing. It is possible to provide a folding guide rail for a stair lift that can be easily lifted in a posture and does not interfere with the passage.

Also, with this configuration, the connecting and holding device is released by pulling up the lever, and the lower guide rail can be folded in an easy posture while standing, and the folded lower guide rail lever is more than necessary. Therefore, when trying to return the lower guide rail to the lower floor, there is a lever at a position where it can be easily held, and it can be easily grasped and pulled up.

Furthermore, with this configuration, it is possible to simultaneously release the connection holding device and the fall prevention device by lifting the lifting lever without having to release them separately, and even if the lower guide rail falls, the fall prevention device works. You can prevent reaching the floor.

As described above, when the folding guide rail of the stair lift of the present invention is provided, the lever of the lower guide rail and the lower guide rail are lifted by pulling up the lever of the lower guide rail with one hand. The fall prevention device can be released at the same time as the connection can be released, and the lower guide rail can be easily lifted while standing. In addition, even if the lifting lever is released from the hand and the lower guide rail falls, the fall prevention device can be prevented from reaching the floor by working.

Hereinafter, a folding guide rail of a stair lift according to the present invention will be described based on an embodiment. In addition, what attached | subjected the same code | symbol in each drawing has the same structure and effect | action, The duplication description about these was abbreviate | omitted suitably.

FIG. 4 is an overall view showing a stair lift according to the present invention, and shows an installation example of a stair lift. Reference numeral 20 denotes a stair lift according to the present invention. A lift 21 is guided by a guide rail 22 and moves up and down. Since the guide rail 22 of this embodiment uses a roller chain (not shown) instead of the conventional rack 3, the shape and structure of the guide rail 22 are different but functionally the same. Therefore, the structure inside the elevating body 21 is not different from the conventional one, and the description is omitted.
The guide rail 22 is divided into an upper guide rail 22a on the upper side near the lower floor 1a and a lower guide rail 22b on the lower side, and the upper guide rail 22a and the lower guide rail 22b are divided into two. A connection holding device 23 for connecting and holding is mounted.

The connection and holding device 23 has the same mechanism as that of the previously filed Japanese Patent Application No. 2004-292345. In FIG. 5, the connection and holding device 23 is provided with a T bolt 24 and a nut 25 on the back surface of the lower end of the upper guide rail 22a. The hole 27a of the L-shaped fulcrum plate 26a fixed at the bottom and the hole 27b of the L-shaped fulcrum plate 26b fixed by the T bolt 24 and the nut 25 on the back surface of the upper end portion of the lower guide rail 22b. The lower guide rail 22b can be folded by being rotatably mounted by a shaft 28.

Next, in FIG. 6, 26 is a fall prevention device, and 26c is a stopper provided so as to protrude from the vertical end of the L-shaped fulcrum plate 26a. Reference numeral 26e denotes a claw which is rotatably attached to a vertical side surface portion of the L-shaped fulcrum plate 26b by a shaft 26d. A hook 26g is attached to the claw 26e so that a spring 26f can be attached to the upper side of the shaft 26d, and a tip end of a rod 26h is rotatably attached to the lower side of the shaft 26d of the claw 26e by a shaft 26i. The claw 26e is provided with a long hole 26j so that the movement of the claw 26e rotating around the shaft 26d is restricted by a stopper pin A26k fixed to the vertical side surface portion of the L-shaped fulcrum plate 26b. It has become. A plate 26m is fixed to the vertical side surface of the L-shaped fulcrum plate 26b. The other end of the spring 26f is locked to the plate 26m so that the claw 26e is always hooked on the stopper 26c. Further, the rod 26h is inserted into the plate 26m, and the fall prevention device 26 is formed by supporting the rod 26h.

Here, when returning the lower guide rail 22b to the lower floor 1a, when the lower guide rail 22b attempts to return from the vertical to the lower floor 1a, the handle 49b of the lever 49 is accidentally moved from the hand. When slipping, the lever 49 returns the claw 26e pulled by the spring 26f and lifts the tip of the claw 26e. In this state, the claw 26e hits a stopper 26c provided so as to protrude from the vertical side end portion of the L-shaped fulcrum plate 26a, and the lower side guide rail 22b does not fall any further.

In FIG. 7, reference numeral 29 denotes a stopper pin. Support plates 30a, 30b and 30c are welded to the lower surface portion of the L-shaped fulcrum plate 26b of the lower side guide rail 22b, respectively, and a stopper is provided between the support plates 30a and 30b. The pin B29 is mounted so as to always protrude through the elastic body 31. The wire 32 is fastened with nuts 40 from both the left and right sides of the support plate 30c. The metal fitting 33a of the wire 32 and the stopper pin B29 are fastened by a pin 34, and the stopper pin B29 is synchronized with the movement of the wire 32. Further, a plate 35 is welded to the tip end portion of the L-shaped fulcrum plate 26a of the upper guide rail 22a, and a hole 36 is provided in which the stopper pin B29 is hooked. When the stopper pin B29 is hooked in the hole 36, the upper guide rail 22a and the lower guide rail 22b are connected to form an integral connection holding device 23.

In FIG. 5, a metal fitting 33b is fixed to the other end of the wire 32, the metal fitting 33b and the other end of the rod 26h are connected to a roller chain 37 by a joint link 38, and the other end of the wire 32 is connected. A bracket 39 located in the middle of the lower guide rail 22b at the tip is fastened from both front and rear by a nut 40 so as not to hang down. In FIG. 8, the other end of the roller chain 37 is connected to the head of a chain end bolt 41 by a joint link 38. The tip of the chain end bolt 41 is a screw, which is screwed into the joint bracket 42 and fixed with a nut 40. A hole 44 into which the pin 43 is inserted is provided on the other side of the joint bracket 42 to constitute a connecting device 45.

4 and 9, the lifting device 46 has a lever for pulling up and folding the lower guide rail. The lifting device 46 has a T-bolt 24 attached to the back of the lower end of the lower guide rail 22b. An end portion of the handle bracket 47 is formed in a U shape downward and is fixed to the T bolt 24 with a nut 25. Further, each support plate 47a, 47b of the U-shaped portion of the handle bracket 47 is provided with a hole 48, and the support shaft portion 49a of the U-shaped lever 49 is pivotally supported. Yes. Further, a stopper portion 50 of an elliptical hole that is long on the left and right is provided below the hole 48 of each support plate 47a, 47b of the U-shaped portion.

In FIG. 8, a convex cam 52 is fixed to the support shaft portion 49 a of the U-shaped lever 49 with a screw 53 between the support plates 47 a and 47 b of the U-shaped portion. Yes. Further, when the pin 43 passes through the stopper portion 50 of a long oval hole on the left and right of the hole 44 of the joint bracket 42 and the support plates 47a and 47b, and the handle 49b of the lever 49 is pulled up, a U-shaped lever 49, the support shaft portion 49a rotates, the projection 52a of the convex cam 52 pulls the pin 43, and the roller chain 37 and the wire 32 are pulled accordingly. It stops at the end 50a of the portion 50. Next, in FIG. 10, the stopper pin B29 is retracted from the hole 36 in the plate 35 at the tip of the L-shaped fulcrum plate 26a of the upper guide rail 22a, and the connection between the upper guide rail 22a and the lower guide rail 22b is released. Thus, the lower guide rail 22b can be folded. Further, the handle 49b of the lever 49 is pulled up, and the lower side guide rail 22b is inverted and folded. FIG. 11 shows a state in which the guide rail is folded.

FIG. 12 is an enlarged view of the connecting device 45 and the lifting device 46 in a folded state. After folding the guide rail, if the lever 49 alone is rotated so that the handle 49b faces downward, the convex cam 52 fixed to the support shaft 49a of the lever 49 reverses. The protruding portion 52b on the opposite side of the protruding portion 52a of the convex cam 52 pushes the pin 43 toward the upper guide rail 22a, and the pressed pin 43 corresponds to the support plates 47a and 47b of the U-shaped portion. The lever 49 stops at the other end 50b of the stopper portion 50 having a long elliptical hole on the left and right, so that the lever 49 does not hang down any further. Thereby, the handle part 49b of the lever 49 does not fall more than necessary, and the handle part 49b can be easily gripped when the lower side guide rail 22b is returned to its original position.

Further, when the lower guide rail 22b is moved away from the handle 49b of the return lever 49, the stopper pin B29 is formed in the L shape of the upper guide rail 22a by the force of the elastic body 31 interposed in the stopper pin B29. The upper guide rail 22a and the lower guide rail 22b are connected and integrated with each other by being hooked in a hole 36 in the plate 35 at the tip of the fulcrum plate 26a.

Next, the operation procedure of the folding guide rail of the stair lift according to the present invention will be described.
Usually, when this stair lift is not used, the lower guide rail 22b is in the way, so the elevator 21 is raised and lowered to a position where the lower guide rail 22b can be folded, and is located on the lower guide rail 22b. The handle 49b of the lever 49 is pulled up. When the handle 49b of the lever 49 on the lower side guide rail 22b is pulled up, the lifting device 46, the connection holding device 23 and the fall prevention device 26 are connected by the connection device 45, so that the stopper pin B29 is connected to the upper side guide rail. The upper guide rail 22a and the lower guide rail 22b are disconnected by being pulled out from the hole 36 in the plate 35 at the tip of the L-shaped fulcrum plate 26a of 22a. At the same time, the rod 26h of the fall prevention device 26 is pulled, and the claw 26e is pulled down so as not to hit the stopper 26c. Further, the handle 49b of the lever 49 can be pulled up, and the lower guide rail 22b can be folded onto the upper guide rail 22a.

The convex cam 52 fixed to the support shaft portion 49a of the lever 49 of the folded lower side guide rail 22b is reversed, so that the handle portion 49b is reversed more than necessary and does not hang down. . Therefore, when the lower side guide rail 22b is to be returned to the lower floor 2a, the handle 49b of the U-shaped lever 49 is located at a position where it can be easily held, so that it can be easily grasped and pulled up easily. .

The above example is
1. The stopper provided so as to protrude from the vertical side end portion of the L-shaped fulcrum plate 26a is provided at only one location, but may be provided at several locations.
2. Although the folding of the rail on the lower floor side is explained, it may be performed on the upper floor side, and the mechanism and effect are not changed.
3. The connecting device may be a single rope body such as a chain or a wire, a combination thereof, a link between the rope body such as a chain or a wire and a rod, or a link mechanism using a link.
4). The convex cam 52 is used in the lifting device having a lever for lifting and folding the lower guide rail. However, as long as the function is achieved without being caught by the convex cam, as shown in FIG. Needless to say, it may be shaped.
5). Moreover, although the connection holding device and the lifting device are fixed to the back surfaces of the lower end portions of the upper guide rail and the lower guide rail by T bolts 24 and nuts 25, the bolts are tapped directly on the back surfaces of the lower end portions of the guide rails. It may be attached by welding or directly welded to each guide rail.
FIG. 13 shows another embodiment of the convex cam, and FIG. 14 shows another embodiment of the stopper portion of the fall prevention device.

Overview of conventional folding guide rail stair lift A perspective view of a conventional folding guide rail part Sectional drawing of the connection holding | maintenance apparatus part of the conventional foldable guide rail part The front view showing the whole stair lift of the present invention Enlarged front view of the folding guide rail portion of the stair lift of the present invention Expanded front view of the fall prevention device AA sectional view in FIG. Enlarged front view of coupling device and lifting device BB sectional view in FIG. Sectional drawing which shows the connection cancellation | release state of the upper guide rail 1a and the lower guide rail 2b Front view with the folding guide rail folded Enlarged front view of the coupling device and lifting device in the folded state (A) Other embodiment A of convex-shaped cam (b) Other embodiment B of convex-shaped cam (A) Other embodiment A of the stopper portion of the fall prevention device (b) Other embodiment B of the stopper portion of the fall prevention device

Explanation of symbols

A Conventional connection holding device 1 Step 2 Conventional folding guide rail 3 Rack 4 Lifting body 5 Drive motor 6 Reducer 7 Pinion gear 9 Passage 10a Upper guide rail 10b Lower guide rail 13 Stopper hole 14 Stopper pin 16 Lever 20 Stair Elevator 21 Elevator 22 Folding Guide Rail 22a Upper Guide Rail 22b Lower Guide Rail 23 Connection Holding Device 26 Fall Prevention Device
26a L-shaped fulcrum plate 26b L-shaped fulcrum plate 26c Stopper 26e Claw 26f Spring 26h Rod 26j Long hole 29 Stopper B pin 31 Elastic body 32 Wire 37 Roller chain 42 Joint bracket 43 Pin 44 Hole 45 Connecting device 46 Lifting device 49 U-shape Lever 49a Lever support shaft 49b Lever handle 50 Stopper 52 Convex cam 52a Cam projection 52b Projection on the opposite side

Claims (1)

The guide rail provided along the slope of the staircase is moved up and down by operating the lifting / lowering body with the operation switch, and the guide rail is cut near the lower floor side, and the fulcrum plate and the lower side provided at the lower part of the upper side guide rail a fulcrum plate provided on the top of the guide rails and rotatably connected at fulcrum shaft, the stairlift that to be able to fold pivots subordinate side guide rail upward,
A lifting device having a lever for turning and folding the lower guide rail upward;
A connection holding device for connecting and holding the upper guide rail and the lower guide rail in a linear posture;
A connection device for connecting the connection holding device and the lifting device;
The coupling device to release said connection holding device via, a the lower guide can and the folding guide rails folding the rail by pulling the lever,
A stopper provided on the fulcrum plate of the upper guide rail, and a claw provided on the fulcrum plate of the lower guide rail and spring-biased to a locking position with the stopper. A fall prevention device is provided for preventing the folded lower guide rail from rotating downward by the locking of the claw,
The lever of the lifting device is integrally provided with a cam having a pair of protrusions on the peripheral surface, and when the lower guide rail is folded, one protrusion of the cam is moved along with the lifting operation of the lever. While the linkage holding device can be released by linking to the connecting device, after the lower guide rail is folded, the other projection of the cam is locked to the stopper provided in the lifting device, The lever can be held at a predetermined angle,
The staircase characterized in that the claw of the fall prevention device is connected to the lever via the connecting device, and the claw is separated from the stopper simultaneously with the release of the connection holding device in accordance with the lifting operation of the lever. Folding guide rail for elevator.