JP2003175762A - Platform lifting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To automate a switching operation from a locked position to an unlocked position of a lock member of a shutdown device for storage to stop a lifting movement of a holding member in storing the platform. <P>SOLUTION: In the case of storing the platform 8 when a holding member 10 reaches a position to store it during lifting up, a stopping device 20 for storage to stop the lifting movement of the holding member 10 is provided. The stopping device 20 for storage comprises a stopper member 21 and a lock member 23 which abuts and avoids abutting against the stopper member 21. An actuator AC is provided having a detecting means capable of detecting that the lock member 23 is away from an abutment state against the stopper member 21, and driving sources 28, 29 to switch over the lock member 23 automatically to the unlocked position according to detection by the detecting means. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a platform lifting device.

[0002]

2. Description of the Related Art A conventional example of a platform lifting device is shown in FIG.
8 and FIG. FIG. 18 is a perspective view showing a platform lifting device for a vehicle, and FIG. 19 is a partial perspective view showing a storage stopping device. As shown in FIG. 18, the platform elevating / lowering device PL is provided below the back door opening 3 of the luggage compartment body 2 of a freight vehicle (simply referred to as a vehicle). The luggage compartment main body 2 has a substantially horizontal floor surface 2a inside the main body. Further, the platform elevating / lowering device PL includes a substantially flat plate-shaped platform 8 on which a load or the like can be placed, and a holding member 10 which holds the platform 8 in a substantially horizontal state. In the drawings, the front, rear, upper, lower, left and right directions of the luggage compartment body 2 of the vehicle are defined as indicated by arrows in the drawings.

Under the floor of the luggage compartment body 2 is formed a storage portion 4 capable of storing the platform 8 in a substantially horizontal state. The storage part 4 is opened at the rear of the vehicle.
A pair of left and right columns 6 each having a substantially rectangular tube shape are provided on both left and right sides of the back door opening 3 of the luggage compartment body 2. As shown in FIG. 19, a slit-shaped slit groove 6a extending in the vertical direction is formed at the lower end of the rear side wall of the column 6.

As shown in FIG. 18, the holding member 10 is provided with a pair of right and left runners 11 each having a substantially rectangular tube shape and slidably inserted into each column 6, that is, vertically movable. Each runner 11 is supported so as to be able to move up and down by elevating means R that uses, for example, a hydraulic cylinder as a drive source.

A runner plate 12 is fixed to the lower end of each runner 11. The runner plates 12 are integrally connected by a connecting member (not shown) extending in the vehicle width direction (left-right direction). The platform 8 is provided on the connecting member via a slide device (not shown) using an electric motor as a drive source, for example.
A storage position stored in the storage section 4 in a substantially horizontal state,
It is movably held in a use position where it can be raised and lowered. The two runner plates 12 move into and out of the slit grooves 6a of the column 6 (see FIG. 19) and downward from the column 6 (see FIG. 18) as the two runners 11 move up and down.

Next, the platform lifting device P described above is used.
The operation of L will be described. The platform 8 is pulled out to the use position by driving the slide device (not shown) while the platform 8 is in the storage position stored in the storage part 4 of the luggage compartment body 2. Subsequently, the lifting means R (see FIG. 18) is driven to move the platform 8 up and down together with the holding member 10, and the required cargo handling work is performed.

After that, when the cargo handling work is completed, the platform 8 is raised or lowered by the elevating means R (see FIG. 18), so that the platform 8 can be stored in the storage portion 4 at a height position (storable position). Position)
Located in. Then, the slide device (not shown)
Is driven in the direction opposite to that when it is pulled out, so that the platform 8 is stored in the storage position in the storage section 4. The platform lifting device PL as described above
Is, for example, Japanese Patent Application No. 2001-25 proposed by the same applicant.
No. 7560 (unpublished at the time of this application).

By the way, in the above platform lifting device PL, when the holding member 10 reaches the storable position during the lifting of the platform 8, the lifting movement (for example, lifting) of the holding member 10 is stopped. The storage stop device 20 is provided. The storage stop device 20 includes a stopper member 21 and a lock member 23, as shown in FIG. Since the stopper member 21 and the lock member 23 are symmetrically arranged, the left stopper member 21 and the lock member 23 will be described, and the right stopper member 21 and the lock member 2 will be described.
The description of 3 is omitted.

The stopper member 21 is projected substantially in the shape of a protrusion from the portion of the column 6 adjacent to the left of the slit groove 6a. Further, the lock member 23 has a substantially rectangular plate shape and its center is rotatable with respect to the left runner plate 12 via a rotary shaft 25 extending substantially in the width direction of the platform 8 (see FIG. 18). Supported by. The lock member 23 is provided with a handle 24 for manual operation.

By operating the handle 24, the lock member 23 is moved to the lock position in the lateral position (see FIG. 19).
The middle position (see solid line 23) and the unlocked position in the vertical posture rotated by about 90 ° from the lock position (see the chain double-dashed line 23 in FIG. 19) can be manually switched. Further, the lock member 23 can come into contact with the stopper member 21 at the lock position (see the solid line 23 in FIG. 19), and at the unlock position (see the chain double-dashed line 23 in FIG. 19). It is possible to avoid contact with the stopper member 21. A positioning mechanism (not shown) using a ball plunger for positioning the lock member 23 at the lock position and the unlock position is provided between the lock member 23 and the runner plate 12.

According to the storage stop device 20 described above, when the platform 8 is moved up and down during the cargo handling work, the lock member 23 is placed in the unlock position (FIG. 1).
9), see the alternate long and two short dashes line 23). As a result, the contact of the lock member 23 with the stopper member 21 is avoided, and the holding member 10 can be lifted beyond the retractable position. In addition, when the platform 8 is stored, the lock member 2
3 is placed in the lock position (see the solid line 23 in FIG. 19). Thus, when the holding member 10 reaches the storable position while rising, the holding member 10 is stopped at the storable position by the lock member 23 coming into contact with the stopper member 21. After that, platform 8
Are stored by being moved to the storage position in the storage unit 4 as described above. The storage stop device 20 as described above is disclosed in, for example, Japanese Patent Application No. 9-104281.

[0012]

In the storage stopping device 20 of the platform elevating device PL described above, the lock member 23 is manually switched. Therefore, it is very inconvenient because the operator has to go to the lock member 23 one by one, and the lock member 23 has to be manually changed one by one.

Therefore, an object of the present invention is to provide a storage stop device for stopping the lifting and lowering movement of the holding member when the platform is stored, and a lock member that can abut the stopper member in the storage stop device. An object of the present invention is to provide a platform elevating device that can automate the work of switching from the locked position to the unlocked position.

[0014]

The above-mentioned problems can be solved by a platform elevating device having the structure described in the claims. That is, according to the platform lifting device according to claim 1 or 2, the platform held by the holding member is pulled out from the storage position to the use position and is moved to the storage position by the storage restricting means. Is moved together with the holding member by the elevating means. At this time, the lock member of the storage stop device is placed in the unlocked position, whereby contact of the lock member with the stopper member is avoided and the holding member can be raised or lowered beyond the retractable position. Further, when the platform is stored, the lock member is placed in the lock position. Thus, when the holding member reaches the storable position while being raised or lowered by the elevating means, the lock member comes into contact with the stopper member to stop the holding member at the storable position. Then, by releasing the restriction of the platform by the storage restriction means, the platform is moved to the storage position and stored.

By the way, according to the platform elevating device described in claim 1 of the invention, after the stored platform is pulled out from the storage position to the use position (storable position), the holding member moves up and down. To raise or lower. Then, the detection means detects that the lock member is separated from the stopper member, and based on the detection by the detection means, the actuator is operated by the drive source to automatically move the lock member from the locked position to the unlocked position. Can be switched. Therefore,
It is possible to automate the operation of switching the lock member, which can come into contact with the stopper member, from the lock position to the unlock position in the storage stop device.

According to the platform elevating device according to claim 2 of the invention, the stored platform is moved from the storage position to the use position (storable position).
After being pulled out, the actuator is operated by the drive source to switch the lock member from the lock position to the unlock position. Therefore, it is possible to automate the switching operation of the lock member, which can be brought into contact with the stopper member, from the locked position to the unlocked position in the storage stop device. Further, since the actuator is provided with the drive source and the motion conversion mechanism that converts the output of the drive source into the force for unlocking the lock member, there is no freedom in design regarding the movement direction or arrangement of the output of the drive source. The degree can be increased.

Next, according to the platform elevating / lowering device described in claim 3, the stored platform is moved from the storage position to the use position (storable position).
When the holding member is raised or lowered by the elevating means after being pulled out to, the detecting means detects that the lock member is separated from the stopper member, and based on the detection by the detecting means, the actuator is driven by the drive source. Upon actuation, the locking member is automatically switched from the locked position to the unlocked position. Therefore, the work of switching the lock member from the locked position to the unlocked position can be further automated.

Next, according to the platform lifting device described in claim 4, the actuator switches the lock member from the unlocked position to the locked position, thereby operating the lock member from the unlocked position to the locked position. The switching work to can also be automated.

Further, according to the platform lifting device described in claim 5, the switching operation of the actuator for automatically switching the lock member from the locked position to the unlocked position is performed between the detection means and the actuator. The delay means provided in the delay means delays a predetermined time from the detection time of the detection means. Therefore, the actuators can be switched and operated after a predetermined time has elapsed since the lock member was separated from the stopper member. This means, for example, when collision of the lock member with the stopper member is predicted to occur when the actuator is switched and operated at the same time as the detection of the detection means, the collision of the lock member with the stopper member is avoided, and This is convenient for preventing a failure in switching the lock member to the unlock position due to a collision.

Next, according to the platform lifting device described in claim 6, the driving source of the actuator is an unlocking driving source for switching the locking member from the locking position to the unlocking position, and the unlocking driving source. A lock drive source for switching the lock member from the unlock position to the lock position. Therefore, the dedicated drive source can appropriately switch the lock member to the unlock position and the lock position.

Next, according to the platform lifting device described in claim 7, the unlocking drive is performed with respect to the rotation shaft of the lock member rotatably supported by the holding member and extending in the width direction of the platform. The unlocking drive source and the locking drive source are arranged such that both output shafts of the power source and the locking drive source are substantially parallel to each other. Therefore, it is possible to realize a compact arrangement of the unlocking drive source and the locking drive source. If the unlocking drive source and the locking drive source are arranged in a state where both output shafts are located on substantially the same axis, a more compact arrangement can be realized.

Next, according to the platform lifting device described in claim 8 of the invention, the motion converting mechanism is
Rotating shafts can be rotated in a predetermined direction by arranging the rotating shafts in a substantially symmetrical manner and interlocking with the driving of the unlocking driving source and the locking driving source and moving in mutually opposite directions. It has a pair of operating levers. Therefore, by interlocking with the driving of the unlocking drive source and the locking drive source, the pair of actuating levers are moved in mutually opposite directions, so that the rotation shaft can be smoothly rotated in a predetermined direction. it can.

Next, according to the platform lifting device described in claim 9, the reverse input absorbing means provided in the motion converting mechanism can absorb the reverse input from the lock member to the drive source. . So, for example,
It is possible to prevent the drive source from becoming a resistance when the lock member is manually switched, and it is possible to easily manually switch the lock member.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] A first embodiment of the present invention will be described. Since the first embodiment is an improvement of the platform elevating device PL described in the above-mentioned [Prior Art] (see FIGS. 18 and 19), the same parts will be denoted by the same reference numerals and redundant description will be repeated. Is omitted. In the first embodiment, the stopper member 21 and the lock member 23 are symmetrically arranged, as in the above-described conventional technique. Therefore, the stopper member 21 and the lock member 23 on the left side will be described, and the right side will be described. The description of the stopper member 21 and the lock member 23 in FIG.

FIG. 1 is a perspective view showing a storage stopping device of a platform lifting device, and FIG. 2 is a partial perspective view showing the storage stopping device. 1 and 2, the left and right runner plates 12 of the holding member 10 are connected to each other by a substantially tubular connecting member (denoted by reference numeral 13) extending in the vehicle width direction (left and right direction).

The rotary shaft 25 of the lock member 23 penetrates through the connecting member 13 and is rotatably supported by the left and right runner plates 12 (FIG. 1 shows only the left side). The left and right ends of the rotary shaft 25 are connected to the left and right lock members 23 (only the left side is shown in FIGS. 1 and 2) symmetrically. The rotary shaft 25 is formed of, for example, a hollow round pipe material.

Further, the stopper member 21 in the first embodiment is a stopper support portion 21 projecting in a block shape from a portion of the column 6 adjacent to the left of the slit groove 6a.
a and a stopper bolt 21b consisting of a headed bolt screwed to the stopper support portion 21a from the lower surface side.
It is composed of and. The lock member 23 (specifically, the one end 23
a) can be contacted. In addition, the stopper support 2
By adjusting the screwing amount of the stopper bolt 21b with respect to 1a, the height of the contact position of the lock member 23 with respect to the head of the stopper bolt 21b, that is, the retractable position of the holding member 10 can be finely adjusted. ing. The column 6 provided with the stopper member 21 corresponds to "a member that is stopped when the holding member moves up and down" in the present specification. The runner plate 12 provided with the lock member 23 corresponds to the "holding member or a member that moves up and down integrally with the holding member" in the present specification.

An auxiliary stopper member 26 is projected from the runner plate 12. Auxiliary stopper member 26
When the lock member 23 is rotated from the unlock position to the lock position, the lock member 23 comes into contact with the lock member 23 (specifically, the other end portion 23b), so that the lock member 23
To the locked position (solid line 2 in FIGS. 1 and 2).
3). Further, when the lock member 23 is rotated from the lock position to the unlock position, the auxiliary stopper member 26 comes into contact with the lock member 23 (specifically, the one end portion 23a) to unlock the lock member 23. It is stopped at the position (see the chain double-dashed line 23 in FIGS. 1 and 2). A positioning mechanism (not shown) is provided between the lock member 23 and the runner plate 12, which uses a ball plunger to position the lock member 23 at the lock position and the unlock position, as in the prior art. There is. The description of the positioning mechanism using the ball plunger is omitted because it has a well-known structure as disclosed in, for example, Japanese Patent Application Laid-Open No. 9-104281.

Although not shown, the holding member 10
Between the platform 8 and the platform 8 (see FIG. 18), when the holding member 10 is in a position other than a predetermined position (storable position), that is, when moving up and down, the platform 8 in the use position moves to the storage position. A storage restricting unit that restricts the storage is provided. As this storage regulation means, for example,
It is possible to use a drive source and a chain transmission mechanism (for example, see Japanese Patent Application No. 2001-257560 (at the time of this application, unpublished)) when the operation of the slide device for sliding the platform 8 in a substantially horizontal direction is stopped. Therefore, the storage restricting unit also has a function of restricting the movement of the platform 8 in the storage position to the use position. In addition, as the storage regulation means, for example,
It is also possible to apply the lock device disclosed in Japanese Patent No. 230547.

As shown in FIGS. 1 and 2, an opening hole 13a for exposing the rotary shaft 25 is formed in a substantially central portion of the connecting member 13 of the holding member 10. Further, the connecting member 13 is provided with an actuator AC capable of switching the lock member 23 from the locked position to the unlocked position and from the unlocked position to the locked position.
A link accommodating box 30 located behind the opening 13a is fixed to the connecting member 13.

The actuator AC includes an unlocking driving source 28, a locking driving source 29, and both driving sources 2
A motion conversion mechanism 40 for converting the outputs of 8 and 29 into the switching force of the lock member 23, that is, the rotational force of the rotary shaft 25.
It has and.

The lock drive source 29 and the unlock drive source 28 will be described. As shown in FIG. 1, the lock driving source 29 and the unlocking driving source 28 are arranged symmetrically between the link accommodating boxes 30. The drive sources having the same configuration are used as the drive sources 28 and 29. It should be noted that FIG. 3 is a front view of the actuator, and FIG.
Fig. 5 is a plan view of the actuator, Fig. 5 is a front view of the motion conversion mechanism, Fig. 6 is a plan view of the motion conversion mechanism, and Fig. 7 is VII of Fig. 6.
A cross-sectional view taken along line -VII is shown.

As shown in FIGS. 3 and 4, the drive sources 28 and 29 are connected to the connecting member 13 of the holding member 10 (see FIG. 1).
28b and 29b fixed to the case 2 and the case 2
The output shafts 28a and 29a are provided so as to reciprocate in the axial direction from one side surface of the 8b and 29b. further,
Each of the drive sources 28 and 29 is built in the cases 28b and 29b, and a spring (not shown) for constantly urging the output shafts 28a and 29a in the advancing direction and the cases 28b and 29b.
An electric motor (not shown) built in b, and a worm gear mechanism (not shown) for converting the rotational driving force of the electric motor into a moving force of the output shafts 28a, 29a in the backward direction.
It has and.

As shown in FIG. 4, each of the drive sources 28, 2
The output shafts 28a and 29a of the electric motor 9 are retreated from the advanced position (see solid lines 28a and 29a in FIG. 4) to the retracted position (see two-dot chain lines 28a and 29a in FIG. 4) by driving the electric motor. When the drive of is stopped, the elasticity of the built-in spring causes the spring to advance from the retracted position to the advanced position. In addition, each drive source 28, 29
The output shafts 28a, 29a of the
Boots 28c, 29c that expand and contract following the forward / backward movement of a.
Is covered.

The drive sources 28 and 29 are both output shafts 28.
a and 29a are arranged so as to face in opposite directions. Further, each drive source 28, 29 is
a and 29a are arranged so as to be substantially parallel to the rotary shaft 25. Further, the drive sources 28 and 29 are arranged such that both output shafts 28a and 29a are located on the same axis L2 that is substantially parallel to the axis L1 of the rotary shaft 25.

The link accommodating box 30 is formed in a substantially rectangular box shape having an opening in the left-right direction. In addition, as shown in FIG. 7, the front side plate (denoted by reference numeral 32) and the rear side plate (denoted by reference numeral 33) of the link housing box 30 have a substantially vertical shape that penetrates in the front-rear direction (left-right direction in FIG. 7). -Shaped opening holes 32a and 33a are formed. On the front side surface (left side surface in FIG. 7) of the front side plate 32, the opening hole 3
A reinforcing plate 37 having an opening hole 37a substantially aligned with 2a is joined.

As shown in FIG. 6, left and right support plate portions 34 and 35 are provided between the front side plate 32 and the rear side plate 33 of the link housing box 30. As shown in FIG. 5, the left support plate portion 34 is provided at a position closer to the lower side than the central portion in the vertical direction. Also, the right side support plate portion 3
5 is provided at a position closer to the upper side than the central portion in the vertical direction.

Next, the motion converting mechanism 40 will be described. Figure 3
Also, as shown in FIG. 4, the motion conversion mechanism 40 includes a pair of left and right connecting levers 41A and 41B and a single connecting rod 42.
And a pair of left and right connecting links 43A and 43B, a pair of upper and lower actuating levers 44A and 44B (see FIG. 3), and one connecting plate 45 (see FIG. 4).
These are described below in order.

First, the connecting levers 41A and 41B will be described. As shown in FIGS. 5 and 6, each connecting lever 41
A and 41B are formed in a substantially plate shape. One end of each coupling lever 41A, 41B is connected to each of the drive sources 28, 2
9 (see FIGS. 3 and 4) are rotatably connected to output shafts 28a and 29a via first pins 51A and 51B, respectively. At the other end of each connecting lever 41A, 41B, a long hole 41a extending in the longitudinal direction of the connecting lever 41A, 41B is formed (see FIG. 6). The long hole 41a corresponds to the "reverse input absorbing means" in this specification.

Next, the connecting rod 42 will be described. As shown in FIGS. 5 and 6, the connecting rod 42 includes a main rod portion 42a extending in the left-right direction, and left and right connecting portions 42A protruding forward (upward in FIG. 6) from both ends of the main rod portion 42a. 42B. Each connecting portion 42A, 4
2B includes vertical direction (vertical direction in FIG. 5).
Second pins 52A and 52B extending in the direction are provided.
Each second pin 52A, 52B is connected to each connecting lever 41A,
The slots 41a (see FIG. 6) of the slot 41B are rotatably engaged with each other and slidable along the slot 41a. The main rod portion 42a of the connecting rod 42 can reciprocate in the left-right direction near the rear (downward in FIG. 6) of the rear plate 33 of the link housing box 30.

Next, the connecting links 43A and 43B will be described. As shown in FIGS. 5 and 6, each connecting link 43
A and 43B are formed in a substantially bell crank shape.
The central portion of the left connecting link 43A is provided on the upper side of the left supporting plate portion 34 of the link accommodating box 30 with the third pin 5.
It is rotatably supported via 3A. The central portion of the right connecting link 43B is rotatably supported below the right supporting plate portion 35 of the link housing box 30 via a third pin 53B. Each connection link 43
A substantially U-shaped engaging groove 43a is formed at one end of each of A and 43B, which are oriented in opposite directions (see FIG. 6).

As shown in FIG. 6, each of the connecting links 43
The other end of each of A and 43B crosses both sides of the rear side plate 33 of the link housing box 30 and projects rearward (downward in FIG. 6). And the connection link 43 on the left side
The other end of A is the main rod portion 42a of the connecting rod 42.
Is rotatably connected via a fourth pin 54A. Further, the other end of the right-side connecting link 43B has a fourth pin 5 with respect to the main rod portion 42a of the connecting rod 42.
It is rotatably connected via 4B.

Next, the operating levers 44A and 44B will be described. As shown in FIGS. 5 and 7, each operating lever 44
A and 44B are formed in a substantially rectangular rod shape. The two actuating levers 44A and 44B are formed in the same shape and are vertically symmetrically arranged. As shown in FIG. 7, the fifth pin 55 is provided at substantially the center of the operating levers 44A and 44B.
A and 55B are projected. Also, the operating lever 44
At the front end (left end in FIG. 7) of A and 44B, the fifth
Hook-shaped engaging portion 44b having a substantially U-shaped connecting groove 44a opening in the same direction as the protruding direction of the pins 55A and 55B.
Are formed.

As shown in FIG. 7, in the upper operating lever 44A, the fifth pin 55A of the upper operating lever 44A is directed downward, and the opening hole 32a of the front side plate 32 of the link accommodating box 30 and the opening hole 37a of the reinforcing plate 37 are provided. Opening hole 3 in the rear side plate 33
It is arranged so as to penetrate 3a. Further, in the lower operating lever 44B, the fifth pin 55B thereof is directed upward, and the opening hole 32a of the front side plate 32 of the link housing box 30, the opening hole 37a of the reinforcing plate 37, and the rear side plate 3 are provided.
It is arranged in a state of penetrating through the three opening holes 33a. In addition, the opening hole 33 of the rear side plate 33 of the link housing box 30.
The a is formed in such a size that it penetrates the rear end portions of both the operating levers 44A and 44B with a slight gap, and guides both the operating levers 44A and 44B slidably in the front-rear direction.

As shown in FIG. 6, a downwardly directed fifth pin 55A of the upper operating lever 44A (see FIG. 7).
Is engaged with the inside of the engagement groove 43a of the right side connecting link 43B so as to be rotatable and slidable along the engagement groove 43a. Further, the upward fifth pin 55B (see FIG. 7) of the lower actuating lever 44B is rotatable with respect to the inside of the engaging groove 43a of the left connecting link 43A and along the engaging groove 43a. Are slidably engaged.

Next, the connecting plate 45 will be described. Figure 6
As shown in FIG. 7 and FIG. 7, the connecting plate 45 is formed in a substantially oval plate shape. A pair of upper and lower connecting pins 56A and 56B that project to one side (for example, the front side of the paper in FIG. 7) project from both upper and lower ends of the connecting plate 45. The connecting plate 45 is fixed substantially concentrically to the portion of the rotary shaft 25 exposed from the opening 13a of the connecting member 13 of the holding member 10 and the pair of connecting pins 56A and 56B are substantially vertically arranged. (See FIGS. 2 and 7). As shown in FIG. 6, the connecting plate 45 has a substantially cylindrical boss portion 45a protruding from the side surface of the connecting pins 56A and 56B on the side opposite to the protruding side and fitted to the rotary shaft 25. . The tip surface of the boss portion 45a slidably contacts the wall surface of the opening hole 13a of the connecting member 13 facing the tip surface.

As shown in FIG. 7, the connecting plate 45 is
The upper connecting pin 56A of the
It is engaged with the inside of the connecting groove 44a of A so as to be relatively rotatable and slidable along the connecting groove 44a. Further, the lower connecting pin 56B of the connecting plate 45 is engaged with the lower operating lever 44B so as to be rotatable relative to the inside of the connecting groove 44a and slidable along the connecting groove 44a. Has been done. The connecting pins 56A, 56B are provided with washers 57 (only the upper washer is shown in FIG. 6) for preventing the actuating levers 44A, 44B from coming off in the axial direction (to the right in FIG. 6) with respect to the engaging portion 44b. Are provided respectively.

Incidentally, as shown in FIG. 6, the holding member 1
A support member 14 that rotatably supports the rotating shaft 25 at a position adjacent to the opening hole 13a is attached to the connecting member 13 of 0.

As shown by the solid line 23 in FIG. 1, when the lock member 23 is in the locked position, both drive sources 28 and 29 shown in FIGS. 3 and 4 are in the OFF state, Each output shaft 28a, 29a is in the advanced position. At this time, the output shafts 28a and 29a are connected to the connecting levers 41
The connecting rod 42 connected through A and 41B is
It is in the left position. As a result, as shown in FIG. 6, the second pin 52A on the left side has the elongated hole 41 of the connecting lever 41A.
the second pin 52 on the right side, which is located closer to the left end of a.
B is located near the left end of the elongated hole 41a of the connecting lever 41B. Further, the right side connecting link 43B connected to the connecting rod 42 is in a position where the upper operating lever 44A is moved forward (leftward in FIG. 7) via the fifth pin 55A thereof. At the same time, the left connecting link 43A connected to the left connecting lever 41A is in a position moved rearward (to the right in FIG. 7) via the fifth pin 55B of the lower operating lever 44B.

FIG. 9 is a side view showing the stored state of the platform according to the operation description. As shown in FIG. 9, a storage completion detection switch Sa for detecting whether or not the platform 8 is in the storage completion state is arranged in the luggage compartment body 2. As the storage completion detection switch Sa, for example, a limit switch is adopted. The storage completion detection switch Sa is set to, for example, turn off (OFF) when the platform 8 is not in the storage completion state and turn on (ON) when the platform 8 is in the storage completion state.

The runner plate 12 is provided with a drawing completion detecting switch Sb for detecting whether or not the platform 8 is in the drawing completed state. A limit switch, for example, is adopted as the drawing completion detection switch Sb. The pull-out completion detection switch Sb is set, for example, to turn off (OFF) when the platform 8 is not in the pull-out completed state and to turn on (ON) when the platform 8 is in the pull-out completed state.

Further, the runner plate 12 is provided with a stopper detection switch Sc for detecting whether or not the lock member 23 is in contact with the stopper member 21. A limit switch, for example, is adopted as the stopper detection switch Sc. The stopper detection switch Sc is set, for example, to be turned off (OFF) when the lock member 23 is separated from the stopper member 21, and turned on (ON) when the lock member 23 is in contact with the stopper member 21. There is. The stopper detection switch Sc corresponds to the "detection means capable of detecting that the lock member in the lock position is in contact with the stopper member is separated from the contact state" in the present specification. Further, as the storage completion detection switch Sa, the pullout completion detection switch Sb, and the stopper detection switch Sc, a reed switch, a photo sensor, or the like can be adopted in addition to a limit switch.

FIG. 8 is a block diagram showing an electric circuit of the platform lifting device. As shown in FIG. 8, the electric circuit EC includes an electric motor (referred to as an unlock motor) 28M of the unlocking drive source 28 (see FIG. 1) and an electric motor (lock) of the locking drive source 29 (see FIG. 1). 29M, each of the detection switches Sa, Sb, Sc
(See FIG. 9) In addition to the power circuit Ps, the main operation switch Sw, the portable remote controller RC, the power pack Pw for controlling the lifting means R (see FIG. 18) of the platform 8, and the slide of the platform 8. An electric motor (referred to as a slide motor SM) capable of rotating the drive source in a device (not shown), a buzzer Bz, and a first
~ Third timers T1 to T3 and first to fourth relays R
Relay box RB having 1 to R4.
The buzzer Bz is arranged at a portion of the luggage compartment body 2 near the platform 8.

In the remote controller RC (see FIG. 9), the main switch (not shown) of the power supply circuit Ps and the main operation switch Sw can be operated wirelessly. The remote control device RC includes a power source operation button Rs, a backward operation button Ra, a forward operation button Ri, an up operation button Ru, a down operation button Re, and a lock operation button Ro.

The main switch (not shown) of the power supply circuit Ps is turned on by pressing the power supply operation button Rs of the remote controller RC. In addition, by pressing the backward operation button Ra,
The reverse switch RR of the main operation switch Sw is turned on. In addition, the forward operation button R
By pushing i, the forward movement switch FR of the main operation switch Sw is turned on. Further, by pushing the raising operation button Ru, the raising switch UP of the main operation switch Sw is operated. Further, by pushing the lowering operation button Re, the lowering switch DOWN of the main operation switch Sw is operated. Further, by pushing the lock operation button Ro, the lock switch LOCK of the main operation switch Sw is operated.

Next, the platform lifting device P described above is used.
The operation of L (see FIG. 9) will be described. Now, the storage state in which the platform 8 is stored in the storage position (see FIG. 9).
2), the storage completion detection switch Sa and the stopper detection switch Sc are in the ON state, and the drawer completion detection switch Sb is in the OFF state. Also, the electric circuit E
The lock motor 29M and the unlock motor 28M at C (see FIG. 8) are off. The platform 8 (see FIG. 9) is held in the storage position by the storage restricting means (not shown) and is restricted from moving to the use position.

When the backward operation button Ra of the remote controller RC (see FIG. 8) is pressed while the platform 8 is stored (see FIG. 9), the main operation switch Sw is released.
The reverse switch RR is turned on. Then, the buzzer Bz of the electric circuit EC shown in FIG. 8 gives an alarm, and the slide motor SM is driven via the first relay R1 and the second relay R2, thereby releasing the regulation of the storage regulation means. The platform 8 thus retracted is retracted or pulled out (see FIG. 10). Further, when the platform 8 starts to be pulled out from the storage position, the storage completion detection switch Sa is turned off.

Then, as shown in FIG. 11, when the withdrawal of the platform 8 to the use position, that is, the retractable position is completed, the withdrawal completion detection switch Sb is turned on. Then, by opening the first relay R1 of the electric circuit EC shown in FIG. 8, the slide motor SM and the buzzer B are opened.
z stops. Along with this, the platform 8 is held in the use position by the storage restricting means (not shown) and its movement to the storage position is restricted.

Next, when the lowering operation button Re of the remote control device RC (see FIG. 8) is pressed, the lowering switch DOWN of the main operation switch Sw is turned on. Then, the power pack Pw descends to descend the platform 8 (see FIG. 12). Further, when the platform 8 (see FIG. 9) starts to be lowered from the retractable position, the stopper detection switch Sc is turned off. Then, the first timer T1 shown in FIG. 8 is turned on, and after a predetermined time (after t1 seconds), the unlock motor 28M is activated via the second timer T2 and the third relay R3. The first timer T1 corresponds to the "delay means" in this specification.

When the unlocking motor 28M is operated, the output shaft 28 of the unlocking drive source 28 (see FIG. 4).
When a is retracted (see the chain double-dashed line 28a in FIG. 4), the connecting rod 4 is connected via the right connecting lever 41B.
2 is moved to the right from the position indicated by the solid line 42 in FIG.
(See middle and two-dot chain line 42). At this time, since the second pin 52A on the left side of the connecting rod 42 slides in the elongated hole 41a of the left connecting lever 41A (see the chain double-dashed line 52A in FIG. 4), the second pin 52A is opposite to the lock drive source 29. Input does not work.

When the connecting rod 42 moves to the right, the connecting link 43B on the right side is rotated counterclockwise in the counterclockwise direction in FIG. 6 (see the chain double-dashed line 43B in FIG. 6). ), The upper operating lever 44A
Are moved backward (to the right in FIG. 7) (see the chain double-dashed line 44A in FIG. 7). At the same time, the left connecting link 43A is rotated in the counterclockwise direction in FIG. 6 in the counterclockwise direction (see the alternate long and two short dashes line 43A in FIG. 6) so that the lower operating lever 44B moves forward (see FIG. 7). To the left) (see the chain double-dashed line 44B in FIG. 7). In this way, the upper and lower actuating levers 44A and 44B are moved in opposite directions, so that the connecting plate 4
5, the rotation shaft 25 is rotated in the clockwise direction in FIG. 7 in the so-called clockwise direction (see the arrow Y1 direction in FIG. 7), whereby the lock member 23 is moved to the two-dot chain line 2 in FIG.
It is rotated to the unlock position indicated by 3 (see FIG. 13).

If a predetermined time (t2 seconds) corresponding to the operation time of the unlock motor 28M (see FIG. 8) necessary and sufficient to rotate the lock member 23 to the unlock position has elapsed, the 2 timer T2 (Fig. 8
(See) turns off, the unlock motor 28M is stopped. Then, the output shaft 2 of the unlocking drive source 28
8a is advanced by the built-in spring (in FIG. 4,
See solid line 28a). At this time, the right connecting lever 41B
Slot 41a of the second pin 52 on the right side of the connecting rod 42
Since it slides relative to B, the connecting rod 42 is not moved.

After that, as shown in FIG. 14, when the platform 8 descends to the ground surface, for example, the operation, that is, the pressing of the descending operation button Re of the remote controller RC (see FIG. 8) is released. As a result, the lowering switch DOWN of the main operation switch Sw is turned off, and the lowering operation of the power pack Pw is stopped. Then, when the raising operation button Ru of the remote controller RC (see FIG. 8) is pressed, the raising switch UP of the main operating switch Sw is pushed.
Turns on. Then, the power pack Pw moves up to raise the platform 8 from the state shown in FIG.

At this time, since the lock member 23 is in the unlock position (see FIG. 13), the contact of the lock member 23 with the stopper member 21 is avoided. For this reason,
As shown in FIG. 15, the platform 8 reaches a position higher than the retractable position (see FIG. 11), that is, a raised position in which the upper surface of the platform 8 is substantially flush with the floor surface 2a of the luggage compartment body 2. . After that, the remote control device R
The operation (i.e., pressing) of C (see FIG. 8) on the ascending operation button Ru is released. As a result, the raising switch UP of the main operation switch Sw is turned off, and the raising operation of the power pack Pw is stopped.

Thereafter, by operating the lowering operation button Re of the remote control device RC (see FIG. 8), the platform 8 is lowered to the state shown in FIG. 14, and the raising operation button Ru is used.
The required cargo handling work is performed by raising the platform 8 to the state shown in FIG.

When the cargo handling work is completed, the platform 8 is stored as follows. That is, by operating the raising operation button Ru or the lowering operation button Re of the remote control device RC (see FIG. 8), the platform 8 is raised or lowered to a position lower than the storable position (see FIG. 11) ( (See FIG. 12). Next, when the lock operation button Ro of the remote controller RC (see FIG. 8) is pressed, the lock switch LOCK of the main operation switch Sw is turned on. Then, the third timer T
The lock motor 29M is operated via the third and fourth relays R4.

When the lock motor 29M is operated,
The output shaft 29a of the lock drive source 29 (see FIG. 4) is retracted (see the chain double-dashed line 29a in FIG. 4), so that the connecting rod 42 is connected to the connecting rod 42 via the left connecting lever 41A.
Is moved to the left from the position of the chain double-dashed line 42 (in FIG. 4,
See solid line 42). At this time, the second pin 52B on the right side of the connecting rod 42 is connected to the elongated hole 41 of the connecting lever 41B on the right side.
Since it slides in a, the reverse input does not act on the lock driving source 29.

When the connecting rod 42 moves to the left, the connecting link 43B on the right side (indicated by the chain double-dashed line 43 in FIG. 6).
6) (see solid line 43B in FIG. 6), the upper actuating lever 44A (see double-dot chain line 44 in FIG. 7) is rotated clockwise in FIG. 6 (see solid line 43B in FIG. 6).
A) is moved forward (left in FIG. 7) (see solid line 44A in FIG. 7). At the same time, the left connecting link 43A (see the chain double-dashed line 43A in FIG. 6) is rotated clockwise in FIG. 6 in the so-called clockwise direction (see the solid line 43A in FIG. 6), so that the lower side The operating lever 44B (see the chain double-dashed line 44B in FIG. 7) is moved backward (to the left in FIG. 7) (see the solid line 44B in FIG. 7). In this way, the upper and lower actuating levers 44A and 44B are moved in mutually opposite directions, so that the rotating shaft 25 together with the connecting plate 45 in the counterclockwise direction in FIG. 7 is a counterclockwise direction (arrow Y2 in FIG. 7). The lock member 23 is rotated to the lock position (see FIG. 12).

A lock motor 29M necessary and sufficient for rotating the lock member 23 to the lock position.
If a predetermined time (t3 seconds) corresponding to the operation time of (see FIG. 8) has elapsed, the third timer T3 (see FIG. 8).
Is turned off, the lock motor 29M is stopped.
Then, the output shaft 29a of the locking drive source 29 is advanced by the built-in spring (see the solid line 29a in FIG. 4). At this time, the long hole 41a of the left connecting lever 41A
Moves relative to the second pin 52A on the left side of the connecting rod 42, so that the connecting rod 42 is not moved.

After that, when the raising operation button Ru of the remote controller RC (see FIG. 8) is pressed, the raising switch UP of the main operation switch Sw is turned on. Then, the power pack Pw moves up to raise the platform 8 from the state shown in FIG. During this ascent, as shown in FIG. 11, the lock member 23 in the lock position (see FIG. 12) abuts the stopper member 21, so that the holding member 10 (see FIG.
And FIG. 2) are stopped at the storable position. At the same time, the stopper detection switch Sc is turned on. After that, the operation of the raising operation button Ru of the remote controller RC (see FIG. 8) is released, and the power pack Pw is released.
Stop the ascending movement of.

Next, when the forward switch operation button of the remote controller RC (see FIG. 8) is pressed, the forward switch FR of the main operation switch Sw is turned on. Then, the first relay R1 and the second relay R1 of the electric circuit EC shown in FIG.
By driving the slide motor SM via the relay R2, the platform 8 with the regulation of the storage regulation means released is moved forward, that is, stored (see FIG. 10). Further, when the platform 8 starts to be stored from the retractable position, the drawer completion detection switch Sb is turned off.

Thereafter, as shown in FIG. 9, when the storage in the storage position of the platform 8 is completed, the storage completion detection switch Sa is turned on. Then, the slide motor SM is opened by opening the second relay R2 shown in FIG.
Stops. Along with this, the platform 8 is held in the storage position by the storage restricting means (not shown) and its movement to the use position is restricted.

Further, the lock member 23 is the handle 2
4 is operated to operate the lock position (see FIGS. 1 and 2).
Middle, solid line 23) and unlock position (FIGS. 1 and 2)
It can be manually switched to the middle and two-dot chain line 23). At this time, by reverse input from the lock member 23,
Each operating lever 44A, 44 in the motion converting mechanism 40
B, the connecting links 43A and 43B, and the connecting rod 42 are operated in conjunction with each other. However, the second pins 52A and 52B of the connecting rod 42 cause the output shaft 2 of the drive sources 28 and 29 to move.
Each connecting lever 41A, 41B connected to 8a, 29a
Slides in the long hole 41a. As a result, each drive source 2
Since the reverse input to 8, 29 is absorbed, each drive source 28,
Reverse input does not work on 29.

According to the above-described vehicle lifting / lowering device, the holding member 10 is released after the stored platform 8 (see FIG. 9) is pulled out from the storage position to the use position (storable position) (see FIG. 11). It is lowered by the elevating means R (see FIG. 18) (see FIG. 12). Then, the stopper member 2
It is detected by the stopper detection switch Sc that the lock member 23 is separated from the actuator 1. Based on the detection by the stopper detection switch Sc, the actuator AC
(See FIG. 1) is operated by the unlocking drive source 28, so that the lock member 23 is moved to the lock position (see FIG. 1).
It is automatically switched from the solid line 23) to the unlock position (see the chain double-dashed line 23 in FIG. 1). Therefore, the stopper member 21 in the storage stop device 20 (see FIG. 1) is
It is possible to automate the work of switching the lock member 23 that can come into contact with the lock position from the lock position to the unlock position.

Further, the actuator AC (see FIG. 1)
Are both drive sources 28, 29 and the motion conversion mechanism 4 for converting the outputs of the drive sources 28, 29 into the switching force of the lock member 23.
Since 0 is provided, it is possible to increase the degree of freedom in designing with respect to the movement direction of the outputs of the drive sources 28 and 29, the arrangement, and the like.

The actuator AC (see FIG. 1) unlocks the lock member 23 (indicated by a chain double-dashed line 2 in FIG. 1).
3)) to the lock position (see the solid line 23 in FIG. 1), the switching operation from the unlock position of the lock member 23 to the lock position can be automated.

An actuator AC for automatically switching the lock member 23 from the lock position to the unlock position.
The switching operation (see FIG. 1) is performed by a first timer T1 (see FIG. 8) provided between the stopper detection switch Sc (see FIG. 9) and the actuator AC (more specifically, the unlock motor 28M (see FIG. 8)). 8), a predetermined time (t1 second) is delayed from the detection time of the stopper detection switch Sc. Therefore, the actuator AC can be switched and operated a predetermined time (t1 second) after the lock member 23 is separated from the stopper member 21. This means that, for example, when a collision of the lock member 23 with the stopper member 21 is predicted to occur when the actuator AC is switched and operated simultaneously with the detection of the stopper detection switch Sc, the lock member 23 with respect to the stopper member 21. It is convenient for avoiding the collision of the above and preventing the switching failure of the lock member 23 to the unlock position due to the collision.

Further, the drive source of the actuator AC is an unlocking drive source 28 for switching the lock member 23 from the lock position to the unlock position, and the lock member 23.
And a lock driving source 29 for switching the lock position from the unlock position to the lock position (see FIG. 4). Therefore, the lock members 23 are driven by the dedicated drive sources 28 and 29.
The switch to the unlock position and the switch to the lock position can be appropriately performed.

The rotary shaft 25 (see FIG. 1) of the lock member 23 rotatably supported by the holding member 10 (see FIG. 1) and extending in the width direction of the platform 8 (see FIG. 18).
In contrast, the unlocking drive source 28 and the locking drive source 29
With both output shafts 28a and 29a in parallel with each other,
An unlocking drive source 28 and a locking drive source 29 are arranged (see FIG. 4). Therefore, it is possible to realize a compact arrangement of the unlocking drive source 28 and the locking drive source 29. In addition, the unlocking drive source 28
Since the lock drive source 29 and the lock drive source 29 are arranged in a state where both output shafts 28a, 29a are located on substantially the same axis L2 (see FIG. 4), a more compact arrangement can be realized.

The motion conversion mechanism 40 (see FIG. 4) is
The rotating shaft 25 is arranged in a substantially symmetrical manner between them, and is interlocked with the driving of the unlocking drive source 28 and the locking drive source 29, and is moved in mutually opposite directions, whereby the rotating shaft 25 is predetermined. Pair of actuating levers 44 rotatable in any direction
A and 44B are provided (see FIG. 7). Therefore, the pair of actuating levers 44A and 44B are moved in mutually opposite directions in association with the driving of the unlocking drive source 28 and the locking drive source 29, whereby the rotary shaft 25 is moved in a predetermined direction. It can be rotated smoothly.

Further, the connecting lever 41 of the motion converting mechanism 40
By the long hole 41a provided in A and 41B (see FIG. 6),
Reverse input from the lock member 23 to the drive sources 28, 29 can be absorbed. Therefore, for example, when manually switching the lock member 23, the drive sources 28 and 29 can be prevented from becoming a resistance, and the lock member 23 can be easily manually switched.

In the above embodiment, for example,
The lock drive source 29 (see FIG. 4) is eliminated, the built-in spring of the unlock drive source 28 is eliminated, and the output shaft 28a of the unlock drive source 28 is locked by the lock member 23.
The one-motor system can be realized by making it possible to stop at the lock position and the unlock position and directly connecting the output shaft 28a and the connecting rod 42.

[Second Embodiment] Next, a second embodiment of the present invention will be described. Since the second embodiment is a modification of the storage stop device 20 of the first embodiment, the modified part will be described in detail, and duplicated description will be omitted. FIG. 16 is a perspective view showing a storage stopping device of the platform lifting device, and FIG. 17 is a side view showing the storage stopping device. Since the storage stop device (denoted by reference numeral 120) in the second embodiment is arranged symmetrically, the storage stop device 120 on the left side will be described, and the storage stop device on the right side will be described. Is omitted.

As shown in FIG. 16, in the storage stop device 120 according to the second embodiment, the stopper member 21 and the lock member 23 in the first embodiment (see FIG. 1) are arranged in reverse. That is, a stopper member (denoted by reference numeral 121) is arranged on the runner plate 12, and a lock member (denoted by reference numeral 123) is disposed in the luggage compartment body 2.
It is located in column 6. The holding member 10
The left and right runner plates 12 are connected by a connecting member 13 extending in the vehicle width direction (horizontal direction).
The rotary shaft 25 (see FIG. 1) in the connecting member 13 is omitted.

The stopper member 121 according to the second embodiment has a stopper support portion 121a projecting in a block shape with respect to the outer surface of the runner plate 12 and a head screwed to the stopper support portion 121a from the upper surface side. It is configured by a stopper bolt 121b which is a bolt. The head of the stopper bolt 121b can come into contact with the lock member 123. Also,
As in the first embodiment, by adjusting the screwing amount of the stopper bolt 121b with respect to the stopper support portion 121a, the contact position of the lock member 123 with respect to the head of the stopper bolt 121b, that is, the holding member 10 (see FIG. 1).
The height of the storable position (see) can be finely adjusted.

As shown in FIG. 16, a base plate 107 is fixed to the outer surface of the column 6. The base plate 107 includes a pair of upper and lower guide members 16
0, 161 are attached. Also, the lock member 12
3 is formed in a substantially rectangular plate shape, and is held by both guide members 160 and 161 so as to be slidable along the base plate 107 in the front-rear direction (left-right direction in FIG. 17). Specifically, the stopper bolt 121b is provided during the ascent of the platform 8 (see FIG. 18).
17 in the retracted position, that is, the locked position (see solid line 123 in FIG. 17), and the stopper bolt 121b that passes without contacting the platform 8 and the platform 8 rises, that is, the unlocked position (in FIG. 17, two points). It is slidable between two positions with the chain line 123).

As shown in FIG. 17, between the lock member 123 and the base plate 107, a positioning mechanism using a ball plunger for positioning the lock member 123 at the locked position and the unlocked position is provided. The positioning mechanism using this ball plunger is an application of the one disclosed in, for example, Japanese Patent Laid-Open No. 9-104281. That is, the base plate 10
7, a ball plunger 170 is attached.
The ball plunger 170 includes a ball (steel ball) 171 supported by being biased in a pushing direction (upward in FIG. 17) by a spring (not shown). On the other hand, a ball plunger 170 is provided at the lower front of the lock member 123.
Locking grooves 124a, 1 before and after the ball 171 is fitted
A protruding piece 124 having 24b is formed. The locking grooves 124a and 124b are provided in a retracted position (locked position) and an advanced position (unlocked position) of the lock member 123.
Is formed corresponding to.

As shown by the solid line 123 in FIG.
The ball 171 of the ball plunger 170 engages with the locking groove 124a on the front side by the biasing force of the spring, whereby the lock member 123 is held at the lock position. At this time,
The stopper piece 12 protruding from the upper end of the lock member 123
When 3a comes into contact with the upper guide member 160, the rearward sliding of the lock member 123 is restricted. Further, the ball plunger 1 is inserted into the locking groove 124b on the rear side.
The lock member 123 is held in the unlocked position by the ball 171 of 70 being engaged by the bias of the spring. At this time, the lock member 123 abuts on the stopper portion 107a protruding to the outer surface of the base plate 107, whereby the forward sliding of the lock member 123 is restricted. When the lock member 123 is slid between two positions, both locking grooves 124 of the protruding piece 124 are
Along the mountain portion 124c between a and 124b, the ball 17
In the state in which 1 is pushed into the ball plunger 170 against the bias of the spring, the ball 171 slides or rolls on the crest portion 124c to get over. As described above, the positioning mechanism using the ball plunger 170 positions the lock member 123 at the locked position (retracted position) and the unlocked position (advanced position).

Further, as shown in FIG. 17, the base plate 107 is provided with an actuator (denoted by AC2) capable of switching the lock member 123 from the lock position to the unlock position and from the unlock position to the lock position. It is provided. The actuator AC2 outputs a drive source 128 and an output of the drive source 128 to the lock member 1.
23, and a motion conversion mechanism 140 for converting into a switching force, that is, a sliding force.

The drive source 128 includes a case 128b fixed to the upper front part of the base plate 107 and an output shaft 128a protruding outward from the case 128b. The drive source 128 includes an electric motor (not shown) built in the case 128b, and a worm gear mechanism (not shown) that converts the rotational driving force of the electric motor into a rotational force around the output shaft 128a. Is equipped with. Further, the output shaft 128a of the drive source 128 is configured to rotate forward and backward at a predetermined angle (for example, about 20 °) by the forward and reverse driving of the electric motor.

The motion conversion mechanism 140 is composed of an output lever 141 and a link member 143. The output lever 141 is formed in a substantially strip shape,
One end of the output lever 141 is fixed to the output shaft 128a of the drive source 128. A drive-side pin 157 projects from the other end of the output lever 141. The link member 143 is formed in a substantially bell-crank shape, and the center portion of the link member 143 is rotatably supported by the support shaft 153 with respect to the base plate 107. At both ends of the link member 143, substantially U-shaped engagement grooves 143a and 143b are formed. The driving-side pin 157 of the output lever 141 is rotatably engaged with one of the engagement grooves 143a of the link member 143 so as to be slidable along the engagement groove 143a. In addition, the other engaging groove 143b of the link member 143
A driven pin 158 protruding from the outer surface of the lock member 123 is rotatably engaged with the lock member 123 so as to be slidable along the engaging groove 143b.

When the lock member 123 is slid from the unlock position to the lock position (see the solid line 123 in FIG. 17), the output lever 141 lowers the drive side pin 157 in the clockwise position (FIG. 17). Medium, solid line 141
(See FIG. 17), the link member 143 is rotated to the counterclockwise position (see the solid line 143 in FIG. 17) that pushes the driven pin 158 backward. In addition, the lock member 123 moves from the locked position to the unlocked position (in FIG. 17, the two-dot chain line 1
23)), the output lever 141
Rotates the drive side pin 157 in the counterclockwise position (in FIG. 17,
A clockwise position where the link member 143 pushes the driven-side pin 158 forward (see FIG. 1) by being rotated by the chain double-dashed line 141).
7), it is rotated to the alternate long and two short dashes line 143).

A stopper detection switch Sc for detecting whether or not the lock member 123 is in contact with the stopper member 121 is arranged on the outer surface of the lock member 123. In addition, the stopper detection switch Sc
Is the same as the "stopper detection switch Sc" of the first embodiment, and it is possible to detect that "the lock member in the locked position is in contact with the stopper member is separated from the state" in the present specification. It corresponds to "detection means".

An unlock position detection switch Sd for detecting whether or not the lock member 123 is in the unlock position is arranged on the outer surface of the lock member 123. A limit switch, for example, is used as the unlock position detection switch Sd. The unlock position detection switch Sd, together with the drive source 128, is connected to the electric circuit E
C (see FIG. 8). In addition to the limit switch, a lead switch, a photo sensor, or the like may be used as the unlock position detection switch Sd.
Although not shown, the storage completion detection switch Sa and the drawer completion detection switch Sb are arranged in the same manner as in the first embodiment.

Next, the platform lifting device P described above is used.
The operation of L (see FIG. 16) will be described. When the platform 8 is lowered after the platform 8 (see FIG. 18) is pulled out from the stored state to the use position (storable position), the stopper detection switch Sc is turned off. Then, after a predetermined time (t1 seconds), the motor of the drive source 128 is operated, and the output lever 141 is rotated in the counterclockwise position (in FIG. 17,
It is rotated to the alternate long and two short dashes line 141). This causes the link member 143 to move to the clockwise position (in FIG. 17, the chain double-dashed line 143).
Then, the lock member 123 is slid to the unlock position (see the chain double-dashed line 123 in FIG. 17). Completion of sliding of the lock member 123 to the unlock position is detected by the unlock position detection switch Sd.

After that, when the platform 8 is raised, the lock member 123 is in the unlocked position (see the chain double-dashed line 123 in FIG. 17), so that the stopper member 121 does not come into contact with the lock member 123. To be done. After that, the required cargo handling work is performed by lowering or raising the platform 8.

When the cargo handling work is completed, the platform 8 is stored as described below. That is, the remote controller RC (see FIG. 8) from the state in which the platform 8 is lower than the retractable position.
When the lock operation button Ro of is pressed, the drive source 128
The motor is driven in reverse. This allows the output lever 1
41 is rotated to the clockwise position (see the solid line 141 in FIG. 17), and the link member 143 is rotated to the counterclockwise position (see FIG. 1).
7, the solid line 143 is rotated, and the lock member 123 is slid to the lock position (see the solid line 123 in FIG. 17). After that, when the platform 8 is lifted, the stopper member 121 abuts the lock member 123 in the locked position during the ascent, and the platform 8 is stopped at the retractable position. At the same time, after the stopper detection switch Sc is turned on, the platform 8 is stored.

According to the second embodiment described above, it is possible to obtain substantially the same operational effects as the first embodiment. Further, according to the second embodiment, the lock member 12 of the storage stop device 20.
3, the main constituent components such as the drive source 128, the motion converting mechanism 140, etc. are arranged on the vehicle body side, not on the holding member 10 (see FIG. 16) side, so that the degree of freedom in designing the arrangement of these components is increased. be able to. Also, the motion conversion mechanism 1
Since 40 is composed of two parts, the output lever 141 and the link member 143, the number of constituent parts is small and the structure can be simplified. In addition, the lock member 123
Since it slides in the vehicle front-rear direction, it is possible to properly receive the load applied by the stopper member 121 coming into contact with the lock member 123.

The present invention is not limited to the above-mentioned embodiments, and modifications can be made without departing from the scope of the present invention. For example, the platform lifting device of the present invention is not limited to a freight vehicle, but can be applied to vehicles such as passenger cars and buses, or for cargo handling work in factories, warehouses, aircrafts, and the like.
In the first embodiment, the actuator AC that can switch the lock member 23 to the unlock position and the lock position has been exemplified. However, the lock member 23 is manually switched to the lock position, and the actuator AC causes the lock member 2 to move.
It is also possible to perform only switching to the unlock position of No. 3. Also, the lock member 23 is locked by rotation.
Instead of switching to the unlock position, switching to the lock / unlock position may be performed, for example, by sliding. Further, the unlocking drive source 28 can be driven by a switch operation, like the locking drive source 29.

Further, the lock member 23 and the stopper member 21
The arrangement relationship with is opposite to that of the above embodiment, that is, the lock member 23 is arranged on the column 6, and the stopper member 21
May be arranged on the runner plate 12 of the holding member 10. Further, in the above-described embodiment, the lock member 23 is brought into contact with the stopper member 21 by raising the platform 8, but the lock member 23 is brought into contact with the stopper member 21 by lowering the platform 8 (see FIG. 9). You may Further, as the unlocking drive source 28 and / or the locking drive source 29, an electromagnetic solenoid, a fluid pressure cylinder such as an air pressure or a hydraulic pressure cylinder, or the like can be adopted instead of the one using an electric motor.

Further, the lock member 23 is connected to the platform 8
The first timer T1 may be omitted as long as it can be switched to the unlocked position and the locked position in the storable position. It is also conceivable that the lock member 23 is switched to the unlock position based on the detection of a limit switch or the like that detects the position of the platform 8 that is lowered by a predetermined amount from the retractable position. Further, the unlocking drive source 28 and / or the locking drive source 29 are
The output shafts 28a and 29a may be arranged in a non-parallel positional relationship with the rotary shaft 25. Further, of the pair of upper and lower actuating levers 44A and 44B, either one of the actuating levers 44A and 44B can be eliminated.

In the second embodiment, the actuator AC2 capable of switching the lock member 123 between the unlock position and the lock position has been illustrated.
It is also possible to manually switch the lock position of the lock member 123 to the lock position and the actuator AC2 only switch the lock member 123 to the unlock position. In addition, the lock member 123
May be replaced with the lock / unlock position by sliding, and may be switched to the lock / unlock position by rotating, for example. Also, the lock member 1
The arrangement relationship between 23 and the stopper member 121 may be opposite to that in the above-described embodiment, that is, the lock member 123 may be arranged on the runner plate 12 and the stopper member 121 may be arranged on the column 6. Further, in the above-described embodiment, the lock member 123 is brought into contact with the stopper member 121 by raising the platform 8, but the stopper member 121 may be brought into contact with the lock member 123 by lowering the platform 8. Further, as the drive source 128, an electromagnetic solenoid, a fluid pressure cylinder such as an air pressure or a hydraulic pressure, or the like can be adopted instead of the one using an electric motor. The first timer T1 may be omitted if the lock member 123 can switch between the unlock position and the lock position in the retractable position of the platform 8. It is also conceivable that the lock member 123 is switched to the unlocked position based on a detection device such as a limit switch that detects the position of the platform 8 that is lowered by a predetermined amount from the retractable position. Further, one of the left and right storage stop devices 20 can be eliminated.

[0103]

As described above in detail, according to the platform elevating / lowering device of the present invention, when the platform is retracted, the retracting stop device for stopping the ascending / descending movement of the holding member is stored. It is possible to automate the switching work from the locked position to the unlocked position of the lock member that can come into contact with the stopper member.

[Brief description of drawings]

FIG. 1 is a perspective view showing a storage stop device of a platform lifting device according to a first embodiment of the present invention.

FIG. 2 is a partial perspective view showing a storage stopping device.

FIG. 3 is a front view showing an actuator.

FIG. 4 is a plan view showing an actuator.

FIG. 5 is a front view showing a motion conversion mechanism.

FIG. 6 is a plan view showing a motion conversion mechanism.

7 is a sectional view taken along line VII-VII in FIG.

FIG. 8 is a block diagram showing an electric circuit of the platform lifting device.

FIG. 9 is a side view showing a stored state of the platform according to the operation description.

FIG. 10 is a side view showing a state in which the platform according to the operation description is being drawn out.

FIG. 11 is a side view showing a completed state of drawing out the platform according to the operation description.

FIG. 12 is a side view showing a state in which the platform according to the operation description is being lowered.

FIG. 13 is a side view showing a switching state of the lock member to the unlock position according to the operation description.

FIG. 14 is a side view showing a lowered state of the platform according to the operation description.

FIG. 15 is a side view showing a raised state of the platform according to the operation description.

FIG. 16 is a perspective view showing a retracting stop device of the platform lifting device according to the second embodiment of the present invention.

FIG. 17 is a side view showing the storage stop device.

FIG. 18 is a perspective view showing a conventional platform lifting device.

FIG. 19 is a partial perspective view showing the storage stop device of FIG. 18.

[Explanation of symbols]

6 Column (a member that stops when the holding member moves up and down) 8 Platform 10 Holding member 12 Runner plate (a holding member or a member that moves up and down together with it) 20 Storage stop device 21 Stopper member 23 Lock member 25 Rotating shaft 28 Locking drive source 28a Output shaft 29 Locking drive source 29a Output shaft 40 Motion conversion mechanism 41A, 41B Connection lever 41a Long hole for connection lever (reverse input absorption means) 44A, 44B Actuating lever AC actuator PL Platform lifting device R Lifting device Sc Stopper detection switch (detection means) T1 First timer (delay means) 120 Storage stop device 121 Stopper member 123 Lock member 128 Drive source 140 Motion conversion mechanism 141 Output lever 143 Link member AC2 Actuator

Claims (9)

[Claims] 1. A platform on which luggage or the like can be placed, a holding member for movably holding the platform between a storage position and a use position, an elevating means for elevating and lowering the holding member, and the holding member. Is not at a predetermined position, the storage restricting means for restricting the movement of the platform to the storage position, and the restriction by the storage restricting means being released while the holding member is moving up or down when the platform is stored. A storage stop device for stopping the vertical movement of the holding member when the storage member reaches a retractable position, and the storage stop device holds the holding member or a member that moves up and down together with the holding member. A stopper member provided on one of the members that is stopped when the member moves up and down, and a lock position at which the other member can abut the stopper member. When the lock member is in the lock position, the holding member is moved to the retractable position during the ascending or descending movement. When the lock member is reached, the lock member abuts against the stopper member to stop the holding member at the retractable position, and when the lock member is at the unlock position, the lock member with respect to the stopper member is stopped. Is a platform elevating device in which the abutment of the holding member is avoided and the holding member can be raised or lowered beyond the storable position, and the locking member in the locked position abuts the stopper member. Detection means capable of detecting separation, and automatically switching the lock member from the locked position to the unlocked position based on detection by the detection means A platform elevating device, characterized in that an actuator having a driving source is provided. 2. A platform on which luggage and the like can be placed, a holding member for movably holding the platform between a storage position and a use position, an elevating means for elevating and lowering the holding member, and the holding member. Is not at a predetermined position, the storage restricting means for restricting the movement of the platform to the storage position, and the restriction by the storage restricting means being released while the holding member is moving up or down when the platform is stored. A storage stop device for stopping the vertical movement of the holding member when the storage member reaches a retractable position, and the storage stop device holds the holding member or a member that moves up and down together with the holding member. A stopper member provided on one of the members that is stopped when the member moves up and down, and a lock position at which the other member can abut the stopper member. When the lock member is in the lock position, the holding member is moved to the retractable position during the ascending or descending movement. When the lock member is reached, the lock member abuts against the stopper member to stop the holding member at the retractable position, and when the lock member is at the unlock position, the lock member with respect to the stopper member is stopped. Is a platform elevating device in which the abutment of the holding member is avoided and the holding member can be raised or lowered beyond the storable position, and an actuator capable of switching the lock member from the lock position to the unlock position is provided. The actuator includes a drive source, and a motion conversion mechanism that converts an output of the drive source into a force with which the lock member is unlocked. A platform lifting device characterized by being equipped with. 3. A detection unit is provided which can detect that the lock member in the locked position is in contact with the stopper member, and the actuator is automatically switched based on the detection of the detection unit. The platform lifting device according to claim 2, wherein the platform lifting device is operated. 4. The platform lifting device according to claim 1, wherein the actuator is operable to switch the lock member from an unlock position to a lock position. 5. The switching operation of the actuator for automatically switching the lock member from the locked position to the unlocked position between the detection means and the drive source of the actuator is performed for a predetermined time from the detection time of the detection means. The platform lifting device according to claim 1 or 3, further comprising delay means for delaying. 6. The drive source of the actuator is an unlock drive source for switching the lock member from the lock position to the unlock position, and a lock drive source for switching the lock member from the unlock position to the lock position. The platform elevating device according to claim 2, further comprising a source. 7. The lock member includes a rotation shaft rotatably supported by the other member provided with the lock member and extending substantially in a width direction of the platform, the lock drive source and the unlock drive. The source includes an output shaft that reciprocates in the axial direction, and
7. The platform elevating device according to claim 6, wherein both output shafts are arranged so as to be substantially parallel to the rotation shaft. 8. The motion conversion mechanism is arranged in a substantially symmetrical manner with the rotary shaft in between and moves in mutually opposite directions in association with driving of the lock drive source and the unlock drive source. The platform elevating device according to claim 7, further comprising a pair of actuating levers capable of rotating the rotating shaft in a predetermined direction by being operated. 9. The motion converting mechanism is provided with reverse input absorbing means capable of absorbing reverse input from the lock member to the drive source. The platform lifting device according to one.