JP4242009B2 - A handrail device for a lift installed in a vehicle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a handrail device for a lift installed in a vehicle for elevating a wheelchair, for example.
[0002]
[Prior art]
This type of handrail device is shown, for example, in Utility Model Registration No. 2594588, and the handrail device of the same publication is provided at the opening of a vehicle and is driven by a drive device by a pair of left and right parallelogram links. And a handrail device that is separately assembled to each side frame of a lift having a pair of left and right side frames that are lifted and lowered by each parallelogram link mechanism to support the platform at the lower end, A handrail body assembled at the base end of the handrail so as to be pivotable in the vertical direction, a lock cam integrally provided at the base of each handrail body, and a cam follower engaged with each lock cam at one end. At the other end, it is rotatably attached to each side frame and is urged toward the locked position by a spring and operated. A lock lever that can be pivoted to an unlocked position by a bar and that cooperates with each lock cam in the locked position to hold the handrail body in a horizontal state and allow the handrail body to pivot in the unlocked position; And a holder fixed to each side frame and holding each handrail body in a stored state along each side frame.
[0003]
In this handrail device, the lock can be released by rotating the operation lever with the handrail main body raised from the horizontal state and rotating the lock lever from the lock position toward the unlock position. In such a state, the handrail main body can be rotated downward to be in a stowed state along the side frame.
[0004]
[Problems to be solved by the invention]
By the way, in the handrail device of the above-mentioned publication, when the handrail main body is placed in the storage state along the side frame from the horizontal use position, the handrail main body is lifted from the horizontal state and the handrail main body is lifted. The operation lever is rotated so that the lock lever is rotated from the lock position toward the unlock position, and the handrail body is turned to the retracted state while the lock lever is held at the unlock position by the operation lever. It is necessary to rotate downward. When operating alone, hold the handrail body with one hand and rotate the operation lever with the other hand to lock the lock lever. Rotate and hold from the position toward the unlock position, and in this state, turn the handrail body held by one hand downward toward the storage state. It is intended a series of operations by hand is required, improving the operability has been desired.
[0005]
[Means for Solving the Problems]
The present invention has been made to meet the above-mentioned demands, and its problem is to improve the operability when operating the handrail body from the use position in a substantially horizontal state to the storage position along the side frame. A handrail main body which is attached to a side frame which is provided at an opening and which is lifted and lowered by a lifting device and which supports a platform at a lower end, and which is rotatably mounted at the base end on the upper side of the side frame. A lock cam integrally provided at the base of the handrail main body, and a cam follower that can be engaged with and detached from the lock cam at the rotation end, and is rotatably assembled to the side frame and is locked by a spring. The handrail main body is held at the use position in a substantially horizontal state by being engaged with the lock cam at the lock position and biased toward the unlock position. A lock lever that is disengaged from the lock cam and allows the handrail body to rotate, a release lever that is rotatably assembled to the side frame and that can be engaged with and disengaged from the lock lever, and the release lever And a rotation restricting member that is provided between the side frames and restricts the rotation of the release lever with a predetermined engagement force, and is provided on the handrail main body, and the handrail main body is unlocked by a predetermined amount above the use position. A release pushing member that pivots the release lever from the return position to the release holding position and pivots the lock lever from the lock position toward the unlock position against the urging force of the spring when the lift lever is lifted to a position; When the handrail main body is pushed down from the unlock position to the storage position along the side frame beyond the use position. Rotated in the return position of the serial release lever from the release holding position has a configuration and a return pressing member to allow rotation of the locked position from the unlocked position of the lock lever. In this case, it is desirable that a rotation resistance applying mechanism that applies a rotation resistance to the handrail body when the handrail body is lifted from the use position toward the unlocking position is provided in the side frame.
[0006]
[Operation and effect of the invention]
In the handrail device according to the present invention, when the handrail main body is lifted from the use position in a substantially horizontal state to the unlock position, the release push member rotates the release lever from the return position to the release holding position, and the lock lever is moved. It rotates from the locked position to the unlocked position against the urging force of the spring. Further, when the handrail body is returned to the substantially horizontal state from the unlock position, the release lever is restrained from turning by the turn restricting member and held at the release holding position, and is biased toward the lock position by the biasing force of the spring. Hold the lock lever in the unlocked position. Therefore, when the handrail main body returns to the substantially horizontal state from the unlocked position, the lock cam and the lock lever are detached and do not engage, and the handrail main body is rotated downward toward the storage position along the side frame. Is possible.
[0007]
In the handrail device according to the present invention, when the handrail body is pushed down from the unlocked position to the storage position beyond the use position, the release lever held at the release holding position by the rotation restricting member is returned and pushed. The member rotates from the release holding position toward the return position, and allows the lock lever to rotate from the unlock position to the lock position. For this reason, the lock lever is rotated from the unlock position toward the lock position by the biasing force of the spring.
[0008]
When the handrail body is lifted from the stowed position toward the use position in a substantially horizontal state, the lock cam is slidably engaged with the cam follower provided on the lock lever, and the lock lever is unlocked against the urging force of the spring. When the handrail body is slightly lifted from the substantially horizontal state, the lock cam and the cam follower are disengaged, and the lock lever is rotated toward the lock position by the spring biasing force. To do. Therefore, when the handrail main body is returned to the use position in the substantially horizontal state after that, the lock cam is engaged with the lock lever and the rotation toward the storage position of the handrail main body is prevented, and the handrail main body is used in the use position in the substantially horizontal state. Can be held in.
[0009]
As is clear from the above description, in the handrail device according to the present invention, the handrail body is moved to the use position by a series of operations that can be operated with one hand, such as lifting the handrail body from the use position to the unlocked position and then pushing it down toward the storage position. A series of operations that can be operated with one hand, such as turning a handrail body toward the storage position and lifting the handrail body slightly from the storage position to a use position in a substantially horizontal state The handrail main body in the storage position can be returned to the use position in a substantially horizontal state and can be held, and the operability of the handrail device, particularly when the handrail main body is rotated from the use position to the storage position, can be But it can be greatly improved as an operation.
[0010]
Further, when the handrail main body is lifted from the use position toward the unlock position when the handrail main body is lifted from the use position to the unlocking position, the handrail main body is provided with a rotation resistance applying mechanism that applies a rotation resistance to the handrail main body. Can be informed to the operator by the rotational resistance that the user is turning from the use position toward the unlock position, and the operator can use the unnecessary operation (e.g., the handrail body in the storage position is in a substantially horizontal state. The operation of lifting the handrail body to the unlocked position) when returning to the use position and holding it can be prevented.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 and 2 show a state in which the lift A is mounted on the vehicle B, and the lift A is a pair of left and right parallels provided at an opening of the vehicle B (for example, an opening at the rear of the vehicle that is opened and closed by a rear gate). A quadrilateral link mechanism 10, a pair of left and right side frames 30 that are lifted and lowered via each parallelogram link mechanism 10 to support the platform 20 in a substantially horizontal state at the lower end, and a lift drive device that drives each link mechanism 10. 40, a rear stopper device 50 provided at the rear end of the platform 20 for restricting the backward movement of the wheelchair (not shown), and forward provided at the front end of the platform 20 when the wheelchair is raised and lowered. The front stopper device 60 for restricting the movement of the handrail, the handrail device 70 assembled to each side frame 30, and the handrail main body 71 of the handrail device 70 A rotational resistance applying mechanism 80 for imparting rotational resistance (see FIG. 3), and a storage drive 90 or the like for housing by erecting the platform 20 in the state shown in FIG.
[0012]
Each parallelogram link mechanism 10 constitutes an elevating device for elevating the platform 20 and the side frame 30 with the elevating drive device 40. The bracket 11 fixed to the floor B1 of the vehicle body, and the bracket 11 The upper arm 12 is mounted at the base end through a shaft 43 (which is rotatably mounted on the bracket 11), and the upper arm 12 is mounted on the bracket 11 through a pin at the base end. The lower arm 13 is rotatably assembled in the direction, and the stay arms 14 are rotatably assembled to the tips of both arms 12 and 13 via pins. The stay arm 14 is a side frame 30. And is formed integrally.
[0013]
The platform 20 is rotatably attached to both side frames 30 via shafts 15 (integrated to the base of the platform 20 and rotatably attached to the side frame 30). 1 is held in the state shown in FIG. 1 (substantially horizontal state) by a support plate 16 provided at the lower end of 30 and is rotated by a predetermined amount in the counterclockwise direction from the substantially horizontal state shown in FIG. It can be stored in the vehicle compartment in a standing state.
[0014]
The storage drive device 90 includes a hydraulic cylinder 91 assembled to the bracket 11, a push plate 92 assembled to the rod tip of the hydraulic cylinder 91, and a push plate integrally assembled to the end of the shaft 15. The arm 93 is configured to be rotated by being pushed by the pin 92 via the pin 94. When the hydraulic cylinder 91 is extended in the state shown in FIG. 2, the arm 93 is rotated counterclockwise. When the platform 20 stands up and the hydraulic cylinder 91 contracts, the arm 93 rotates clockwise to return the platform 20 to the illustrated state.
[0015]
Each elevating drive device 40 is rotatably connected to the bracket 11 via a pin at the base end, and is connected to the connecting arm 42 (the upper arm 12 via a shaft 43 rotatably attached to the bracket 11 at the tip end). A hydraulic cylinder 41 that is pivotally connected to a distal end of the parallelogram linkage mechanism 10 via a pin, and hydraulic oil to the hydraulic cylinder 41 A hydraulic control circuit (not shown) for controlling supply and discharge, and an electric control circuit (not shown) for controlling the operation of an electric hydraulic pump and an electromagnetic switching valve provided in the hydraulic control circuit are configured.
[0016]
In the lift drive device 40, the electric hydraulic pump is driven while operating the lift push button switch included in the electric control circuit, and hydraulic oil is supplied to the hydraulic cylinder 41, whereby the hydraulic cylinder 41 extends. The electromagnetic switching valve is energized and hydraulic oil is discharged from the hydraulic cylinder 41 so that the hydraulic cylinder 41 is contracted to operate. Thus, the platform 20 is raised by the extension operation of the hydraulic cylinder 41, and the platform 20 is lowered by the contraction operation of the hydraulic cylinder 41.
[0017]
The rear stopper device 50 is fixed to the rear end of the platform 20 via a pin 51 so as to be pivotable in the vertical direction, and the stopper plate 52 is fixed at a solid line position or a virtual line position in FIG. The lock pin (not shown) is configured to be manually operable. The front stopper device 60 includes a stopper plate 61 assembled to the front end of the platform 20 through the shaft 15 so as to be pivotable in the vertical direction, and the stopper plate 61 when the platform 20 is located at a position other than the rising end of FIG. The lock mechanism (not shown) is fixed at a solid line position and is in a horizontal state when the platform 20 is at the ascending end. The lock mechanism is interlocked with the movement of the platform 20.
[0018]
As shown in FIGS. 3 and 4, each handrail device 70 includes a handrail main body 71 assembled to the upper portion of the side frame 30 via a pin 31 so as to be vertically rotatable at the base end, and a handrail. A lock cam 72 provided integrally with the base portion of the main body 71 and a cam follower 73 that can be engaged with and disengaged from the lock cam 72 are provided at the upper end (rotation end). A lock lever 74 that is movably assembled, a release lever 75 that is pivotally assembled to the side frame 30 via the pin 31 at the base end, and a portion between the release lever 75 and the side frame 30. And a release push pin 77 and a return push pin 78 provided integrally with the base end portion of the handrail main body 71.
[0019]
The handrail main body 71 is exposed to the outside of the side frame 30 except for the base end portion accommodated in the side frame 30, and is used at a use position in a substantially horizontal state indicated by a solid line in FIGS. 2 and is stowed at a stowed position along the side frame 30 indicated by the phantom line in FIG. 2. The stowed position along the side frame 30 is provided on the side frame 30. The rubber U-shaped holder 39 is elastically clamped.
[0020]
The lock lever 74 is accommodated in the side frame 30 and engages with the lock cam 72 at the lock position shown in FIG. 3 (the position where the pin 33 is fixed to the side frame 30) to engage the handrail main body 71. 3 is controlled in the clockwise direction, the handrail main body 71 is held at the use position in a substantially horizontal state, and the unlock position shown in FIGS. 5 to 7 (on the pin 34 fixed to the side frame 30). The handrail main body 71 is allowed to rotate by being detached from the lock cam 72 at the engagement position), and is always biased toward the lock position by the tension coil spring 79. The tension coil spring 79 is assembled with one end locked to the pin 74a fixed to the lock lever 74 and the other end locked to the pin 33 fixed to the side frame 30, and is locked by a predetermined urging force. The lever 74 is urged counterclockwise in FIG.
[0021]
As shown in FIG. 4, the release lever 75 is formed in a substantially U shape, and can be engaged with and disengaged from the lock lever 74 at the rotation end. A protrusion 75 a is provided that protrudes toward the inner surface by a predetermined amount (an amount that does not contact the side frame 30) and holds the rotation restricting spring 76. Further, the release lever 75 is engaged with the pin 35 fixed to the side frame 30 at the return position shown in FIGS. 3 and 8, and is restricted from turning clockwise in FIGS. Yes.
[0022]
The rotation restricting spring 76 is a compression coil spring provided between the side surface of the release lever 75 and the inner surface of the side frame 30 so as to accommodate the protrusion 75 a of the release lever 75 inside. It engages slidably and rotates integrally with the release lever 75 to restrict the rotation of the release lever 75 with a predetermined engagement force, as shown in FIGS. Thus, when the release lever 75 is engaged with the lock lever 74, the urging force of the tension coil spring 79 restricts the lock lever 74 from rotating.
[0023]
The release push pins 77 are provided on both side surfaces of the base end portion of the handrail main body 71. As shown in FIGS. 3 and 5, the handrail main body 71 is lifted from the use position to a lock release position by a predetermined amount. Sometimes, the release lever 75 is rotated from the return position to the release holding position, and the lock lever 74 is rotated from the lock position toward the unlock position against the urging force of the pulling coil spring 79. Yes.
[0024]
The return push pins 78 are provided on both side surfaces of the base end portion of the handrail main body 71. As shown in FIGS. 7 and 8, the handrail main body 71 is moved from the unlock position to the side frame 30 beyond the use position. The release lever 75 is rotated from the release holding position to the return position when being pushed down to the retracted storage position, and the lock lever 74 is allowed to rotate from the unlocked position to the locked position by the urging force of the tension coil spring 79. It is supposed to be.
[0025]
The rotation resistance applying mechanism 80 is accommodated in the side frame 30, has a cylindrical support 81 fixed to the side frame 30, a rod 82 slidably assembled to the support 81, and the rod 82. A circlip 83 that is assembled and restricts movement of the rod 82 by engagement with the support 81; a compression coil spring 84 that is interposed between the support 81 and the rod 82 and presses the rod 82 with a predetermined biasing force; It is composed of a cushion rubber 85 that is fixed to the tip of the rod 82 and cushions the contact with the handrail main body 71. The handrail main body 71 is directed from the use position shown in FIG. 3 toward the lock release position shown in FIG. A predetermined turning resistance (load) is applied to the handrail body 71 when it is lifted.
[0026]
In the handrail device 70 of the present embodiment configured as described above, when the handrail main body 71 is lifted from the substantially horizontal use position shown in FIG. 3 to the unlock position shown in FIG. The release lever 75 is rotated from the return position toward the release holding position, and the lock lever 74 is rotated from the lock position toward the unlock position against the urging force of the spring 79.
[0027]
Further, when the handrail main body 71 is returned to the substantially horizontal state from the unlocking position shown in FIG. 5, the releasing lever 75 is restricted from being rotated by the rotation restricting spring 76 and is held at the releasing holding position. Thus, the lock lever 74 biased toward the lock position is held in the unlock position. Therefore, when the handrail main body 71 returns to the substantially horizontal state from the unlocked position shown in FIG. 5, the lock cam 72 and the lock lever 74 are detached and do not engage with each other, and the handrail main body 71 is moved along the side frame 30. It is possible to rotate downward toward the storage position.
[0028]
Further, when the handrail main body 71 is pushed down from the unlocked position shown in FIG. 5 to the storage position shown in FIG. 8 beyond the use position, as shown in FIGS. The return push pin 78 rotates the release lever 75 held at the release holding position by the 76 from the release holding position to the return position, and the lock lever 74 is allowed to turn from the unlocked position to the locked position. To do. For this reason, the lock lever 74 is rotated from the unlock position toward the lock position by the urging force of the spring 79, as shown in FIG.
[0029]
When the handrail main body 71 is lifted from the storage position shown in FIG. 8 toward the use position in the substantially horizontal state shown in FIG. 3, the lock cam 72 is slidably engaged with the cam follower 73 provided on the lock lever 74. Although the lock lever 74 is rotated toward the unlock position against the urging force of the spring 79, when the handrail body 71 is slightly lifted from the substantially horizontal state, the lock cam 72 and the cam follower 73 are engaged. The lock lever 74 is released and rotated toward the lock position by the biasing force of the spring 79. Therefore, when the handrail main body 71 is then returned to the use position in the substantially horizontal state, the lock cam 72 is engaged with the lock lever 74 and the handrail main body 71 is rotated toward the storage position as shown in FIG. The handrail main body 71 can be held at the use position in a substantially horizontal state.
[0030]
As is clear from the above description, in the handrail device 70 of the present embodiment, the handrail main body 71 is lifted from the use position shown in FIG. 3 to the unlocked position shown in FIG. The handrail main body 71 in the use position can be rotated toward the storage position and the handrail main body 71 can be rotated by a series of operations that can be operated with one hand, such as being pushed down toward the storage position shown in FIG. The handrail main body 71 in the storage position shown in FIG. 8 is shown in FIG. 3 by a series of operations that can be operated with one hand, such as lifting it slightly from the storage position and returning it to the use position in the substantially horizontal state. The operability of the handrail device 70, in particular, the handrail main body 71 can be moved from the use position shown in FIG. 3 to the storage position shown in FIG. It can be significantly improved as well be operated with one hand the operability when rotated in.
[0031]
Further, in the handrail device 70 of the present embodiment, when the handrail body 71 is lifted from the use position shown in FIG. 3 toward the lock release position shown in FIG. 5, a rotation resistance is applied to the handrail body 71. Since the dynamic resistance applying mechanism 80 is provided on the side frame 30, the handrail main body 71 is rotated from the use position shown in FIG. 3 toward the unlocking position shown in FIG. The operator can be notified of unnecessary operations by the operator (for example, when the handrail main body 71 in the storage position is returned to the use position in the substantially horizontal state and held, the handrail main body 71 is brought to the unlock position. Lifting operation) can be prevented.
[Brief description of the drawings]
FIG. 1 is a side view of a lift platform equipped with a handrail device according to the present invention at a lowered end.
FIG. 2 is a side view of the lift with the platform shown in FIG. 1 at the rising end.
FIG. 3 is an enlarged vertical sectional side view of a main part of the handrail device shown in FIG.
4 is a partially longitudinal rear view of the main part of the handrail device shown in FIG. 3 as viewed from the rear. FIG.
FIG. 5 is an operation explanatory diagram in a state in which the handrail body of the handrail device shown in FIG. 3 is lifted to the unlocked position.
6 is an operation explanatory diagram in the middle of pushing down the handrail body of the handrail device shown in FIG. 5 toward the storage position (in a state where the handrail is rotated downward from the use position).
FIG. 7 is an operation explanatory diagram in the middle of pushing down the handrail body of the handrail device shown in FIG. 6 toward the storage position (a state where the handrail is rotated to the vicinity of the storage position).
FIG. 8 is an operation explanatory diagram of the handrail device shown in FIG. 7 in a state where the handrail body is pushed down to the storage position.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Parallelogram link mechanism, 20 ... Platform, 30 ... Side frame, 40 ... Drive device, 50, 60 ... Stopper device, 70 ... Handrail device, 71 ... Handrail body, 72 ... Lock cam, 73 ... Cam follower, 74 ... Lock Lever, 75 ... release lever, 76 ... rotation regulating spring (rotation regulating member), 77 ... release push pin (release push member), 78 ... return push pin (return push member), 79 ... tension coil Spring, A ... lift, B ... vehicle.

Claims (2)

A handrail device provided at an opening of a vehicle and assembled to a side frame that is lifted and lowered by a lifting device and supports a platform at a lower end, and is configured to be pivotable in a vertical direction at a base end on the upper side of the side frame. A handrail main body to be attached, a lock cam integrally provided at the base of the handrail main body, and a cam follower that can be engaged with and disengaged from the lock cam at a rotation end, and is rotatably assembled to the side frame. The handrail main body is urged toward the lock position by a spring, engages with the lock cam at the lock position, holds the handrail main body at the use position in a substantially horizontal state, and disengages from the lock cam at the unlock position. A lock lever that allows rotation, and a release that can be engaged with and disengaged from the lock lever by being pivotally assembled to the side frame. A bar, a rotation restricting member that is provided between the release lever and the side frame and restricts the rotation of the release lever with a predetermined engagement force, and is provided on the handrail body so that the handrail body is moved from the use position. When lifted to the unlocking position above a predetermined amount, the release lever is rotated from the return position to the release holding position, and the lock lever is rotated from the lock position to the unlock position against the biasing force of the spring. A release pushing member that is provided on the handrail main body, and when the handrail main body is pushed down from the unlock position to the stowed position along the side frame beyond the use position, the release lever is returned from the release holding position. And a return push member that allows the lock lever to rotate from the unlocked position to the locked position. Handrail apparatus. The vehicle according to claim 1, wherein a rotation resistance applying mechanism that applies a rotation resistance to the handrail body when the handrail body is lifted from the use position toward the unlocking position is provided on the side frame. Lift handrail device equipped with.

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