JP4329071B2 - Platform flapper device in a vehicle lifting device - Google Patents

Description

  The present invention relates to a platform flapper device in a vehicle lifting apparatus.

  When the flapper of the vehicle lifting device is raised, the wheelchair is placed on the platform while the platform is in contact with the ground, the flapper is raised by pressing the lift switch, the platform is raised, and the platform is raised and lowered. Sometimes, the lowering switch is pushed down to lower the platform, and when the platform touches the ground, the flapper is pushed down to open, and the wheelchair is lowered from the platform.

A conventional general slide lift (a lift that is slid into a vehicle while a wheelchair is on the platform) is protruded below the rear end of the platform as disclosed in Japanese Patent Laid-Open No. 7-300043. In the automatic undulation type in which the flapper is opened by the cam, the cam that protrudes when the platform is slid into the vehicle cannot be used because it interferes with the floor surface. As described in Japanese Patent Application Laid-Open No. 2002-127803, the flapper standing Only lifting is automated, and when the platform is opened, the ground contact of the platform is confirmed, and an electric motor is operated with a dedicated switch and the flapper is opened with that power.
Japanese Patent Laid-Open No. 7-300043 JP 2002-127803 A

However, in the above-mentioned general slide lift, a caregiver feels that the platform is in contact with the ground and opens the flapper, and the grounding may not be perfect due to unevenness in the ground, and the wheelchair is The vehicle's spring, which had been reduced by the weight of the wheel, was reduced in weight due to the movement of the rear wheel of the wheelchair to the ground, and the vehicle was lifted up. The front wheel of the wheelchair floated and the wheelchair fell.
The present invention has been developed for the purpose of eliminating the above drawbacks and ensuring reliable operation and safety.

  A flapper that can be raised and lowered around the base end bearing at the rear end of the platform, a flapper articulating undulation that connects the back of the flapper, and turns the flapper up and down around the platform bearing, and a spring An inclined guide surface that is urged in place by pressure and is connected to the upright flapper's lock pin in a face-to-face manner, rotates the required width against the bias, and rotates the inclined guide surface A lock plate that has a lock groove that engages with the lock pin, and that has a release pin that abuts with a release cam provided on the flapper connecting operation undulation, and that rotates to unlock the lock groove, and for the flapper Hydraulically move the articulated undulation rod to the flapper's upright side, and a piston rod with a piston rod that moves back with the spring pressure installed on the overturning side of the opposite flapper. In flapper apparatus platform in the vehicle lifting device comprising a wrapper cylinder.

  The lock plate is provided with a handle portion and may be manually unlocked from the lock pin of the flapper.

  A flapper release spring may be interposed between the flapper and the platform, and the moving force may be accumulated on the rear side when the flapper is standing up to be locked up.

  The flapper cylinder that operates the flapper articulating undulations and the platform lift cylinder may communicate with a hydraulic circuit.

  The unlocking cam, which is integrated with the flapper's articulated undulation, pivots to the rear side of the flapper and the side away from the flapper when the piston rod flapper moves down, and locks the unlocking cam against the release pin of the lock plate The flapper may be laid down by rotating the plate and releasing the engagement between the lock groove and the lock pin.

  Conventionally, in a general slide lift, since it was operated by a flapper switch button, an operation error due to a misunderstanding of a caregiver was induced. However, in the platform flapper device in the vehicle lifting and lowering device of the present invention, first, the platform When the lift switch button is pushed, the platform will not rise unless the flapper is raised and mechanically locked by hydraulic operation. At the top, the flapper will not be folded up, i.e. without interfering with the passenger compartment. It can be moved into or out of the passenger compartment, and the flapper that stands up can be easily laid down forward by a mechanical release operation. It is possible to carry out care activities appropriately. Also, when raising or lowering the platform, hydraulic pressure is applied to the flapper cylinder to stop the piston rod, so the flapper is securely locked in the upright state, and the platform and flapper function as a grounding sensor even during descending grounding. However, it is possible to achieve a safety mechanism that does not unlock the flapper unless it is directly grounded.

  A flapper that can be raised and lowered around the base end bearing at the rear end of the platform, and a flapper articulating undulation that connects the back of the flapper and turns the flapper up and down around the platform bearing; An inclined guide surface that is energized in place by the spring pressure and faces and connects to the left and right lock pins of the flapper is provided on the corresponding surface, and the required width is rotated against the bias, and the tilted guide surface is rotated. A lock plate that engages with the lock pin, and has a release pin that collides with a release cam provided on the flapper articulation undulation, and rotates to release the lock groove lock, It has a piston rod that hydraulically moves the flapper's articulated undulations to the flapper's upright side, and returns and moves with the spring pressure built in on the opposite side of the flapper. That flapper cylinders and flapper device platform in the vehicle lifting device comprising a.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A platform entry / exit flapper device in a vehicle lifting apparatus according to the present invention will be described below with reference to the drawings as an example. FIG. 1 is an overall schematic view of the platform lifting mechanism. 2 includes a platform 4 that can be moved laterally on the vehicle floor 3 as shown in the figure, and a gate frame 5 that supports the platform 4 movably from the left and right. A base frame 6 is arranged on the floor surface 3 of the vehicle, and the lower ends of the upper link 7 and the lower link 8 are pivotally supported on the base frame 6 by supporting shafts 9 and 10, and the opposite upper ends of the gate frame 5 are supported. A lever portion 13 formed by supporting the upper links 7 and 12 at the upper portion and extending the lower end of the upper link 7 to the other side around the support shaft 9 is provided. The base end of the platform lifting cylinder 16 and the tip of the piston rod 16a are connected to the tip of the base portion 13 and the upper part of the base frame 6 with the support shafts 14 and 15, and the support shaft 9 is centered by the operation of the platform lifting cylinder 16 In FIG. 1, the gate frame 5 indicated by the solid line in FIG. 1 is lowered to the position of the gate frame 5 indicated by the temporary line, and the gate frame 5 indicated by the temporary line is operated in the opposite direction. The position is raised to the position of the gate frame 5 indicated by the solid line.

  Rail frames 17, 17 having rail surfaces 17 a, 17 b facing up and down are provided on both sides of the platform 4 on the left and right sides. 19, and the platform 4 is slidably supported back and forth, and although not shown, the rack is arranged on the platform 4, the pinion is arranged on the gate frame 5, the both are meshed, and the prime mover linked to the pinion is rotated. It is provided so that it can be moved backward and retracted forward.

  A left bearing 20a is provided on the upper left side of the rear end of the platform 4, and a right bearing 20b is provided on the upper right side. The left support shaft 21a is provided on the left bearing 20a, and the right support shaft 21b is rotatably supported on the right bearing 20b. In addition, the base end of the flapper 22 is pivotally supported on the left support shaft 21a and the right support shaft 21b so that the whole can be freely raised and lowered.

  A flapper articulating undulation ridge 23 is supported on the left support shaft 21a and the right support shaft 21b, and base ends of the left side portion 23a and the right side portion 23b are respectively supported freely. 23c is delivered, and the delivery part 23c is arranged so as to be connected to the lower surface near the base end of the flapper 22.

  The flapper articulating undulation ridge 23 is formed so as to be able to move away from the flapper 22 about the left support shaft 21a and the right support shaft 21b independently.

  Unlocking cams 24a and 24b are provided integrally with the left and right side portions 23a and 23b of the flapper articulating undulation rod 23.

  The flapper cylinder 25 is arranged on the right side near the rear end of the platform 4 and the piston rod 26 protrudes rearward. The front end of the flapper cylinder 25 is connected to the connecting portion 23d of the right side portion 23b of the flapper connecting undulation rod 23 by the support shaft 27. The flapper articulation operating undulation rod 23 is provided so as to rotate about the left support shaft 21a and the right support shaft 21b by the movement of the piston rod 26. The piston rod 26 is springed to the tip side by a spring 25a provided in the cylinder.

  A left abutment plate 28a and a right abutment plate 28b are separately provided on the left upper surface and the right upper surface of the rear end of the platform 4 in front of the left bearing 20a and the right bearing 20b, respectively.

  A left lock plate 29a having a left lock groove 29a2 that locks only the backward rotation following the left inclined guide surface 29a1 on the lower surface of the distal end, and similarly, a rear surface following the right inclined guide surface 29b1 on the lower surface of the distal end. A right lock plate 29b having a right lock groove 29b2 for locking the rotation to the front side and the front side and a handle 29b3 on the upper surface is provided, and the base end of one of the left lock plates 29a serves as the left abutment plate 28a The base end of the other right lock plate 29b is rotatably arranged up and down by the support shaft 30b.

  As shown in FIGS. 3 and 5, the left lock groove 29a2 has an L shape, and locks on the rear side but does not lock on the front side. Therefore, the lock pin can be rotated on the front side. Does not require a handle. The lock groove may be formed in a U shape to lock the rotation to the front side. In this case, although not shown, a handle is attached for release.

  The locking groove 29b2 may be U-shaped as shown in FIGS. In the U-shaped right lock groove 29b2, the lock pin cannot be rotated to both the rear side and the front side. Therefore, the handle 29b3 is provided on the upper surface in order to rotate the base end and release it. It is what you need.

  A left regulating pin 31a and a right regulating pin 31b project from the left side surface near the tip of the left abutment plate 28a and the right side surface near the tip of the right abutment plate 28b, respectively, so that the left lock plate 29a and the right lock plate 29b The left restricting pin 31a and the right restricting pin 31b corresponding to the left restricting hole 32a and the right restricting hole 32b respectively opened in the middle are respectively inserted, and the rotation angles of the left lock plate 29a and the right lock plate 29b are restricted to the required angles. is doing.

  The front and rear middle of the left lock plate 29a, the rear of the left fulcrum plate 28a by the left fulcrum 30a, the rear middle of the right lock plate 29b, and the rear of the right fulcrum plate 28b by the right fulcrum 30b. In addition, the traction spring 33a and the right traction spring 33b are respectively stretched, and the left lock plate 29a and the right lock plate 29b are always urged so that the respective distal ends pivot downward about the respective pivot points. is doing.

  When the left side lock pin 34a protrudes from the left side of the flapper 22 toward the base end upper surface and the right side lock pin 34b protrudes from the right side of the base end upper surface, the left lock pin 34a Is engaged with the lock groove 29a2 of the left lock plate 29a, and the right lock pin 34b is engaged with the lock groove 29b2 of the right lock plate 29b and locked in that state.

A left release pin 35a is provided on the left side of the left lock plate 29a near the tip of the left side, and a right release pin 35b is provided on the side of the right side of the right lock plate 29b. When the right lock release cam 24b is rotated by the operation of the flapper cylinder 25, the right lock release cam 24b contacts and pushes out of the respective rotation passages, releases the lock of the left lock plate 29a and the right lock plate 29b, and moves the flapper 22 to the rear side. It is provided so that it can rotate freely.
For safety, the flapper 22 is provided with left and right lock pins 34a and 34a on the left and right side surfaces, and the platform 4 is provided with left and right lock plates 29a and 29b. However, the flapper 22 may be provided only on one side thereof. is there.

  A flapper release spring 36 is wound around the left support shaft 21 a, one rising end 36 a is engaged and connected to the left side 23 a of the flapper articulating operation protuberance 23, and the other standing end 36 b is connected to a spring on the platform 4. It is arranged so as to be connected to the receiver 37 and tightened, and to apply an unlocking operating force to the flapper connecting operating relief rod 23.

  Although not shown, the flapper release spring 36 may be of a type that compresses the entire length or a type that extends. And it is the structure which locks a flapper in a standing state in the state which acquired the return force. Therefore, when the lock is released, the flapper 22 is surely started to fall down and tilted, and then the piston rod 26 is pulled and moved through the flapper articulated undulation rod 23 by the self-weighting action of the flapper 22. The flapper 22 is grounded.

  An operation projection 38 for detecting the rise of the flapper 22 is provided on the left side edge of the flapper 22, and a limit switch 39 is attached to the abutment plate 40 disposed at the left rear end of the platform 4.

  The platform elevating cylinder 16 and the flapper cylinder 25 are connected as shown in the hydraulic circuit of FIG. In the figure, 41 is a hydraulic pump, 42 is an oil tank, 43 is a circuit open / close solenoid valve, 44 is a platform lift solenoid valve, 45 is a support shaft, and the base end of the flapper cylinder 25 is outside the right side surface of the platform 4. It is pivotally supported.

  Since the embodiment of the platform entry / exit flapper device in the vehicle lifting / lowering device of the present invention is configured as described above, although not shown, when the lift switch button is pressed, the hydraulic pump 41 operates and the oil to be sent is Since the circuit opening / closing solenoid valve 43 and the platform lifting / lowering solenoid valve 44 are closed, they enter the flapper cylinder 25, and as shown in FIG. 2, the piston rod 26 is pulled forward and connected to the tip of the piston rod 26. The flapper articulating undulation rod 23 is rotated about the left and right support shafts 21a and 21b, and the flapper articulating operation undulation rod 23 is also connected to the front surface of the delivery portion 23c. , 21b. Since the flapper joint operation undulation rod 23 is integrally provided with left and right lock release cams 24a and 24b, they rotate together and come into contact with the left and right release pins 35a and 35b of the left and right lock plates 29a and 29b. These are pushed up and passed forward, and then the lock pins 34a and 34b provided on the left and right side surfaces of the flapper 22 are applied to the left and right inclined guide surfaces 29a1 and 29b1, and the left and right traction springs 33a and 33b are extended to extend the left and right lock plates 29a and 29b. At the same time, it is pushed up around the left and right support shafts 21a and 21b, and the flapper release spring 36 is compressed with the spring receiver 37 by the rotation of the flapper connecting operation undulation rod 23, and passes in a state where the return force is accumulated. When the left and right lock pins 34a and 34b face the left and right lock grooves 29a2 and 29b2, the weight and the left Traction spring 33a, the right and left locking plates 29a by the action of 33b, engage the left and right lock groove 29a2,29b2 descends rotating the 29 b, securely locked. Then, the oil enters the platform lifting cylinders 16 and 16 and pushes the piston rods 16a and 16b, so that the flat platform 4 is raised. At this time, since the flapper cylinder 25 and the platform raising / lowering cylinder 16 are in communication, the flapper 22 is not opened when the hydraulic pressure is applied, that is, when the platform is floating. If the operation projection 38 is removed from the limit switch 39 for some reason while the platform 4 is rising, the platform lifting / lowering solenoid valve 44 is closed, so that the hydraulic pressure is cut off, the platform 4 stops rising, and its stop position. To last.

  When the platform 4 reaches the highest lift position shown by the solid line in FIG. 1, a limit switch (not shown) is operated to close the platform lifting / lowering solenoid valve 44. Therefore, the platform can be moved forward relative to the gate frame 5, and the platform can be accommodated in the vehicle compartment by a switch operation. Then, when an attendant gets into the vehicle through the platform 4, if the hand is pulled up to the handle portion 29b3 of the right lock plate 29b, the right lock pin 34b of the flapper 22 is engaged with the lock groove 29b2 of the right lock plate 29b. Come off. Since the left lock pin 34a and the left lock plate 29a and the flapper articulating undulation ridge 23 are configured to be free on the forward side, the left and right support shafts 21a and 21b are centered without operation. The flapper 22 can be tilted forward and stored on the platform 4. Therefore, a caregiver or the like can easily get over the flapper 22 and get into the platform and the passenger compartment.

  Next, when the flapper 22 is lying down forward in the passenger compartment, the platform 4 can be easily lifted up to stand and the left and right lock pins 34a and 34b of the flapper 22 are moved to the left and right lock plates. The left and right lock grooves 29a2 and 29b2 of 29a and 29b are engaged with each other and locked in the standing state. Since the flapper release spring 36 has already been compressed, it is not necessary to compress the flapper release spring 36 at the time of standing, and the flapper release spring 36 can be lifted lightly. The platform 4 is moved manually or by a power unit to the solid line position shown in FIG. Although not shown, when the lowering switch button is pressed, the hydraulic circuit opening / closing solenoid valve 43 and the platform lifting / lowering solenoid valve 44 are opened, and the piston rods 16a and 16a of the platform lifting / lowering cylinders 16 and 16 have a platform and a loaded weight. Since it is hung, oil is pushed out into the pipeline and returned to the oil tank 42. Therefore, the platform 4 performs a lowering operation. Since the hydraulic pressure is applied during the lowering operation of the platform 4, the hydraulic pressure is also applied to the communicating flapper cylinder 25, and the piston rod 26 is held in the pushed-in state, so that the flapper 22 maintains the standing lock state.

  When the platform 4 comes into contact with the ground, the hydraulic pressure of the platform lifting cylinders 16 and 16 and the flapper cylinder 25 becomes zero, and the piston rod 26 is pushed out by the spring 25a and the flapper release spring 36 in the flapper cylinder 25. The left and right lock release cams 24a and 24b connected to the H. 26 lift the left and right release pins 35a and 35b, rotate the left and right lock plates 29a and 29b about the left and right support shafts 21a and 21b, and the left and right lock pins 34a of the flapper 22. , 34b, the left and right lock grooves 29a2, 29b2 are released, the lock is released, and the flapper 22 is opened. Therefore, when the flapper 22 is pushed rearward by the spring pressure of the flapper release spring 36 and tilted rearward from the vertical line passing through the left and right support shafts 21a and 21b, the flapper 22 is given its own weight to the flapper joint operation undulation ridge 23, The flapper 22 is laid down in accordance with the backward movement of the flapper connecting operation undulation cage 23. The operation protrusion 38 on the left side of the flapper 22 is separated from the limit switch 39 on the abutment plate 40 of the platform 4, and the limit switch 39 is opened.

  As long as the platform 4 is in contact with the ground and the pressure in the platform elevating cylinders 16 and 16 is not zero, the flapper 22 is not opened and is not affected by the unevenness of the ground.

  Even if a malfunction occurs in the hydraulic hose of the flapper cylinder 25, the flapper 22 is mechanically locked, so the function as the flapper 22 does not change. Further, since the flapper joint operation raising / lowering rod 23 is connected to the flapper 22, the flapper 22 can be raised and lowered independently and can be used as a manual flapper by closing the valve of the flapper cylinder 25. .

  It is a low-cost, robust, reliable operability and safety product that can be handled easily by the general public.

FIG. 1 is an overall schematic side view showing an embodiment of a flapper device for a platform in a vehicle lifting / lowering device of the present invention. Similarly, it is a partial right side view of the platform in a state where the flapper is opened and knocked down. Similarly, it is the partial left view of the platform of the state which opened the flapper and fell down. Similarly, it is a partial top view of the platform of the state which opened and opened the flapper. Similarly, it is a partial right side view of the platform in a state where the flapper is raised and locked. Similarly, it is a partial left side view of the platform with the flapper raised and locked. Similarly, it is a partial right side view in a retracted state in which the flapper is opened and brought down to the platform. Similarly, it is a hydraulic circuit diagram for raising and lowering the platform and for operating the flapper.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle raising / lowering device 2 Platform raising / lowering mechanism 3 Floor surface 4 Platform 5 Gate frame 6 Base frame 7 Upper link 8 Lower link 9 Support shaft 10 Support shaft 11 Support shaft 12 Support shaft 13 Lever part 14 Support shaft 15 Support shaft 16 Platform lifting / lowering Cylinder 16a Piston rod 17 Rail frame 17a Rail surface 17b Rail surface 18 Roller 19 Roller 20a Left bearing 20b Right bearing 21a Left shaft 21b Right shaft 22 Flapper 23 Part 24a Left lock release cam 24b Right lock release cam 25 Flapper cylinder 25a Spring 26 Piston rod 27 Support shaft 28a Left support plate 28b Right support plate 29a Left lock plate 29a1 Left inclined guide surface 29a2 Hook groove 29b right lock plate 29b1 right inclined guide surface 29b2 right lock groove 29b3 handle 30a left support shaft 30b right support shaft 31a left control pin 31b right control pin 32a left control hole 32b right control hole 33a left traction spring 33b right traction Spring 34a Left lock pin 34b Right lock pin 35a Left release pin 35b Right release pin 36 Flapper release spring 36a One standing end 36b The other standing end 37 Spring receiver 38 Operation projection 39 Limit switch 40 Abutment plate 41 Hydraulic pump 42 Oil tank 43 Solenoid valve for circuit opening / closing 44 Solenoid valve for platform lifting / lowering 45 Support shaft

Claims (5)

  A flapper that can be raised and lowered around the base end bearing at the rear end of the platform, a flapper articulating undulation that connects the back of the flapper, and turns the flapper up and down around the platform bearing, and a spring An inclined guide surface that is urged in place by pressure and is connected to the upright flapper's lock pin in a face-to-face manner, rotates the required width against the bias, and rotates the inclined guide surface A lock plate that has a lock groove that engages with the lock pin, and that has a release pin that abuts with a release cam provided on the flapper connecting operation undulation, and that rotates to unlock the lock groove, and for the flapper Hydraulically move the articulated undulation rod to the flapper's upright side, and a piston rod with a piston rod that moves back with the spring pressure installed on the overturning side of the opposite flapper. Flapper apparatus platform in the vehicle lifting device comprising a wrapper cylinder.   2. The flapper device for a platform in a vehicle lifting and lowering device according to claim 1, wherein the lock plate has a handle portion and is manually unlocked from the lock pin of the flapper.   The vehicle lifting / lowering device according to claim 1 or 2, wherein a flapper opening spring is interposed between the flapper and the platform, and when the flapper is erected, the moving force is accumulated on the rear side to be raised and locked. Platform flapper device. The flapper cylinder and the platform for elevating cylinder for actuating the articulated hydraulic relief lever flapper, claim 1 for communicating the hydraulic circuit, flapper apparatus platform in the vehicle lifting device according to claim 2 or claim 3.
The unlocking cam, which is integrated with the flapper's articulated undulation, pivots to the rear side of the flapper and the side away from the flapper when the piston rod flapper moves down, and locks the unlocking cam against the release pin of the lock plate 2. A flapper device for a platform in a vehicle lifting apparatus according to claim 1, wherein the flap is lowered by rotating the plate and releasing the engagement between the lock groove and the lock pin.

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