HK1195287B - Extending device of platform in vehicle elevator - Google Patents

Description

Extension device for platform of vehicle lifting device

Technical Field

The present invention relates to an extension device for a platform provided in a vehicle lifting device.

Background

Patent document 1 discloses a sliding type lifting device , which includes: a main arm 20 coupled to the chute 4 to be freely movable in the horizontal direction; a side frame 23 pivotally connected to a front end of the chute 4; a platform 40 and a chute 4 slidably attached to the side frame 23; a chain 27 connected between the side frames 23; and a lift assist arm 30 pivotally supported at a position near the opening/closing port of the vehicle body; by driving the chute 4 in the forward and backward directions, the intermediate portion of the main arm 20 is supported by the lift assist arm 30, and the main arm 20 is rotated to lift and lower the table 40 in a substantially horizontal state.

Patent document 2 discloses a lifting device in which fixed pillars fixed to a vehicle body are erected on the left and right sides of a loading/unloading port of a vehicle, and a lifting platform fixed to the lower ends of the lifting pillars and sliding along the fixed pillars is fixed at an intermediate position while being lifted from the ground to the ground; the lifting platform comprises: a main elevating platform horizontally kept at the lower end of the elevating support; an intermediate frame which is accommodated in the main elevating table and is supported so as to protrude from the main elevating table; and an auxiliary lifting platform which is accommodated in the main lifting platform and is supported in a manner of protruding from the middle frame.

Patent document 3 discloses a lifting device including a sub-platform 4b for extending and contracting a platform 4 relative to a main platform 4 a.

(Prior art document)

(patent document)

Patent document 1: japanese patent laid-open No. 2000-211420

Patent document 2: japanese laid-open patent publication No. 5-208639

Patent document 3: japanese patent laid-open publication No. 2010-83413

The platform 40 of the invention disclosed in the patent document is formed of a rectangular flat plate having a required lateral width in the left-right direction and a required longitudinal length in the front-rear direction, and is lifted and lowered in a substantially horizontal state, and therefore, although it has advantages of a simple structure and a stable strength, it has a disadvantage that the storage volume is increased because it cannot be reduced.

The invention disclosed in patent document 1 is a lifting device in which a lifting table includes: a main elevating platform horizontally kept at the lower end of the elevating support; an intermediate frame which is accommodated in the main elevating table and is supported so as to protrude from the main elevating table; and an auxiliary lifting platform which is accommodated in the main lifting platform and is supported in a manner of protruding from the middle frame; therefore, the intermediate frame and the auxiliary lifting table slide on the main lifting table through the link 44 in the form of a conductive frame, and therefore, the intermediate frame and the auxiliary lifting table have a disadvantage of being respectively extended to a uniform width.

Further, since the auxiliary lifting table is accommodated in the intermediate frame, and the intermediate frame is sequentially accommodated in the main lifting table, there is a disadvantage that a step difference in thickness of each housing occurs in each step surface.

In the invention disclosed in patent document 3, the platform 4 is composed of a main platform 4a and a sub-platform 4b, and slides vertically and doubly when stored, so that the storage volume is reduced, the space is effectively used, and the platform is enlarged to about 2 times the area when stored to be configured to be an appropriate length when used, but the length of the platform cannot be extended to be longer than the appropriate length.

Disclosure of Invention

(problems to be solved by the invention)

However, from the standpoint of the persons concerned such as hospitals and old people care facilities, the passengers cannot board the wheelchair using a mobile bed or a special wheelchair due to the length of the platform. Further, from the standpoint of general transportation operators, there is a fear that the long-sized article cannot be placed.

The present invention has been made to solve the needs of the users, and an object of the present invention is to provide an extension device that can extend a platform as necessary and can use the platform for a vehicle lifting device in an original length when unnecessary.

(means for solving the problems)

An extension device for a platform for a vehicle lifting device, comprising: a platform which is driven by electric power or oil pressure to automatically lift and has a main platform for carrying a movable sickbed or long goods and a secondary platform which is connected with the main platform in a freely sliding way and is combined with the main platform; the auxiliary platform is composed of an auxiliary platform positioning part and an auxiliary platform extension moving part; in the vehicle lifting device in which the sub-deck extension moving unit and the sub-deck positioning unit are provided with locking mechanisms for locking at a fixed position and an extended moving position, the deck is provided so that an extended moving unit floor of the sub-deck extension moving unit is superposed on and above a fixed unit floor of the sub-deck positioning unit, thereby forming a general use length, and is configured so that the sub-deck extension moving unit is relatively slid from the sub-deck positioning unit in a deck projecting direction, thereby extending a required length of the deck. .

According to one embodiment of the present invention, the sub-deck positioning portion is spaced apart from the front and rear of each inner surface of the left and right side portions of the positioning portion frame, and is disposed with the roller being axially supported by the fixed shaft on which each base end is fixedly provided; the auxiliary platform extending and moving part is provided with a U-shaped track which is opened towards the outside on each outer surface of the left side part and the right side part of the extending and moving part frame, is embedded with the roller of the fixed part frame, is combined in a mode of moving towards the front and back sliding direction, and extends and moves the using length of the auxiliary platform according to the requirement; the lock mechanism is configured such that a front lock plate and a rear lock plate are provided at front and rear sliding positions on respective outer surfaces of a left side portion and a right side portion of the extension moving portion frame, the front lock plate and the rear lock plate are engaged with each other, and the lock mechanism is coupled to the respective outer surfaces of the left side portion and the right side portion of the positioning portion frame.

The method may also include: the rear end portions are respectively mounted on the lifting mounting shafts so as to be capable of lifting up and down as a whole, and a fixed portion floor is mounted on the sub-deck fixed portion and an extended moving portion floor is mounted on the sub-deck extended moving portion.

The method may also include: a lock lever pivotally supported by a support shaft at a desired angle to an outer surface of each of rear portions of left and right side portions of the fixed portion frame, a plate portion of the lock lever having a coupling hole formed therein with the support shaft as a center, a shaft having both ends supported by the left and right side portions and a pin provided at a front end of a rotary coupling portion integrally provided with a base end, the shaft being provided at the left or right side portion with tension applied thereto by a coil spring so as to rotate in one direction; the plate portion of the locking lever is provided on the outer surface of each of the left and right side portions of the extension moving portion frame so that a front locking pin and a rear locking pin, which are provided at equal distances in the front-rear direction about a support shaft, are engaged with the front locking plate or the rear locking plate at the front-rear sliding end positions of the sub-deck extension moving portion, and the front locking plate is connected to a front tilting plate and the rear locking plate is connected to a rear tilting plate.

(effect of the invention)

The extension device of the platform for the vehicle lifting device according to the present invention is configured as described above, and therefore, by pushing down the lock lever of the lock mechanism, the platform extension moving portion (including the sub-platform extension moving portion, hereinafter the same) can be manually pulled out backward with respect to the platform positioning portion (including the sub-platform positioning portion, hereinafter the same), and the entire length of the platform can be extended.

Drawings

Fig. 1 is a plan view showing a use state in which a main platform and a sub platform constituting a platform are extended to a length of a normal use state in an extension device of a platform for a vehicle lifting device according to the present invention.

Fig. 2 is a plan view showing an extended movement use state in which the sub-deck extended moving part is extended with respect to the sub-deck positioning part of the sub-deck in the extension device of the platform for a vehicular elevating device according to the present invention.

Fig. 3 is a side sectional view showing a minimum storage state of the platform by storing the sub-platform, in which the sub-platform extension moving unit is stored in the sub-platform positioning unit, above the sub-platform in the extension device of the platform for the vehicular elevating device according to the present invention.

Fig. 4 is a side sectional view showing a use state in which the main platform and the sub platform constituting the platform are extended to a length corresponding to a normal use state in the extension device of the platform for the vehicle lifting device according to the present invention.

Fig. 5 is a side sectional view showing an extended movement use state in which the extension device of the platform for the vehicular elevating device according to the present invention extends the sub-platform extended moving portion with respect to the sub-platform positioning portion.

Fig. 6 is a plan view showing an extended use state of a main floor of a main platform, a fixed portion floor of a sub platform fixed portion, and an extended moving portion floor of a sub platform extended moving portion in the extension device of a platform for a vehicular elevating system according to the present invention.

Fig. 7 is a partially enlarged side sectional view showing an extended movement use state in which the sub-deck extended movement portion is extended relative to the sub-deck positioning portion in the extension device of the platform for the vehicular elevating device of the present invention.

Fig. 8 is a partially enlarged partial side sectional view showing a part of the main floor, the stationary part floor and the extended movable part floor which are in a state where the main deck and the sub deck are reduced to the minimum storage state in the extension device of the deck for a vehicle lifting device according to the present invention.

Fig. 9 is an enlarged plan view of a positioning portion frame alone constituting the sub-deck positioning portion.

Fig. 10 is an enlarged plan view of an extension moving portion frame unit constituting the sub-deck extension moving portion.

Fig. 11 is a partially enlarged partial side sectional view showing a structure of the sub-surface plate capable of longitudinal extension movement and a lock mechanism for locking the sub-surface plate positioning portion and the sub-surface plate extension movement portion at normal time and extension movement time.

Fig. 12 is a partially enlarged partial side sectional view similarly showing a structure of the sub-surface plate capable of longitudinal extension movement and a lock mechanism for locking the sub-surface plate positioning portion and the sub-surface plate extension movement portion at the time of normal operation and extension movement.

Fig. 13 is a partially enlarged, partially sectioned side view taken along line D-D of fig. 11.

Fig. 14 is a partially enlarged, partially sectioned side view taken along line E-E of fig. 11.

Fig. 15 is an enlarged partial plan view showing a configuration of a sub-deck positioning portion that pivotally supports the sub-deck extending/moving portion in a slidable manner, and a lock mechanism that locks the sub-deck extending/moving portion.

Fig. 16 is a top view of the locking bar monomer.

Description of the main Components

1 extension device of platform for vehicle lifting device of embodiment of the invention

2 platform

3 storage case

4 main platform

4a Main platform frame

5 pairs of platforms

5a sub-table positioning part

5a1 stationary part frame

5a11 left side

5a12 right side

5b sub-platform extension moving part

5b1 extended moving part frame

5b11 left side

5b12 Right side

6U-shaped rail

7 contact roller

8 fixed axle

9U-shaped rail

10L shaped board

11 support arm

12 longitudinal axis

13 guide roller

14 sliding guide

15a front locking plate

15b rear locking plate

15c rear stop

16 locking mechanism

17 locking lever

17a plate part

17b axle tube

18 fulcrum

19 connecting hole

20 shaft

21 rotating joint part

22 pin

22a escape hole for rotation

Coil spring with 23 coils

24a front locking pin

24b rear locking pin

25a forward inclined plate

25b backward inclined plate

26 bearing part

27 main floor

27a front end portion

27b rear end portion

28 screw

29 floor of stationary part

29a front end portion

29b rear end portion

29c1 outer edge

29c2 outer edge

30 lifting installation shaft

30a mounting shaft hole

31 floor with extended moving part

31a front end portion

31b rear end portion

32 lifting installation shaft

32a mounting shaft hole

33 relay board

34 floor connection section difference eliminating means

35a, 35b guide plate

36 floor sliding guide means

37 surface slide belt plate

38 sliding means for extending floor of moving part

39 slide belt plate for back surface

Sliding means for 40 fixed part floor

41 lifting trolley

42 bracket

43 bracket

44 support shaft

45 support shaft

46 quadrilateral chain link

47 quadrilateral chain link

48-cylinder device

49 piston

50 operating rod

51 track

52 rack

53 roller

54 pinion

55 platform truck prime mover

56 roller

57 track part

58 contact roller

59 rack

60 primary driving mechanism of main platform

61 pinion

Detailed Description

The extension device for a platform for a vehicle lifting device comprises: a platform fixing part which is separated from the inner surface of the left side part and the right side part of the fixing part frame in the front and back direction and is configured by fixing a fixed shaft supporting roller with each base end; a platform extending and moving part which is provided with a U-shaped track opened towards the outside on each outer surface of the left side part and the right side part of the extending and moving part frame, is embedded with the roller of the fixed part frame, is combined in a mode of moving towards the front and back sliding direction, and extends the using length of the moving platform according to the requirement; a fixed part floor is arranged on the platform fixed part, an extension moving part floor is arranged on the platform extension moving part, and the extension moving part floor of the platform extension moving part is arranged above the fixed part floor of the platform fixed part in a superposition way in a way that each rear end part is respectively arranged on a lifting installation shaft and the whole can be lifted freely; a lock lever is pivotally supported by the outer surface of each rear portion of the left and right side portions of the fixed portion frame at a desired angle by a support shaft, and a plate portion of the lock lever is provided with a coupling hole centered on the support shaft, and a shaft having both ends supported by the left and right side portions and a pin provided at the front end of a rotary coupling portion having a base end integrally provided are coupled to the coupling hole with clearance fit, and the shaft is provided at the left or right side portion by a coil spring to be rotated in one direction with a tension applied thereto; a plate portion of the locking lever is provided with a locking mechanism on each of outer surfaces of a left side portion and a right side portion of a frame of the platform extending and moving portion in such a manner that a front inclined plate is connected to the front locking plate and a rear inclined plate is connected to the rear locking plate in order to engage a front locking pin and a rear locking pin, which are provided at equal distances in the front-rear direction around a support shaft, with the front locking plate or the rear locking plate at front and rear sliding end positions of the platform extending and moving portion; a front lock plate and a rear lock plate are provided at front and rear sliding positions on the outer surfaces of the left and right side portions of the extension moving portion frame, and lock mechanisms engaged with the front lock plate and the rear lock plate are connected to each other and provided on the outer surfaces of the left and right side surfaces of the platform of the sub-platform positioning portion.

[ examples ] A method for producing a compound

Hereinafter, the extension device of the platform for the vehicular elevating device according to the present invention will be described based on the embodiment shown in the drawings, and the extension device of the platform for the vehicular elevating device according to the present invention is shown in fig. 1, and the entire platform 2 is the main platform 4 and the sub platform 5 constituting the platform 2 are slid in the protruding direction from the housing arc body 3, and the platform 2 has a normal total length a. The platform 2 is set to be automatically (electrically or hydraulically driven) moved up and down.

In the embodiment, the sub-surface plate 5 shown in FIG. 1 is composed of a sub-surface plate positioning part 5a and a sub-surface plate extension moving part 5 b.

The platform 2 is manually slid by a width B of a sub-platform extension moving part 5B with respect to a sub-platform positioning part 5a on which a moving bed or long cargo which cannot be placed in a state of the normal total length a is placed, and the sub-platform 5 is extended to extend the total length of the platform 2 from a to a + B.

Next, in the sub-deck 5 according to the embodiment of the present invention, U-shaped rails 6, 6 opened outward are provided on the outer surfaces of the left side portion 5a11 and the right side portion 5a12 of the positioning portion frame 5a1 of the sub-deck positioning portion 5a in the lateral direction, and are spaced apart from the inner surfaces of the left side portion 5a11 and the right side portion 5a12 in the front-rear direction, and 2 (one-side) rollers 7, 7 are pivotally arranged on fixed shafts 8, 8 having base ends fixed to the U-shaped rails 6, 6.

Corresponding to the U-shaped rails 6, 6 of the sub-deck positioning section 5a, U-shaped rails 9, 9 opened outward are provided on the outer surfaces of the left side section 5b11 and the right side section 5b12 of the extension moving section frame 5b1 of the sub-deck extension moving section 5b, the rollers 7, 7 are fitted to the U-shaped rails 9, and the L-shaped plate 10 is provided with a stopper for the rollers 7, so that the sub-deck extension moving section 5b can move in the front-rear sliding direction with respect to the sub-deck positioning section 5 a.

Further, in the above-described pivoting structure of the rollers 7 and 7, since the sub-platform extending movement portion 5b is swung in the left and right directions during the sliding movement and does not slide smoothly, 2 (one-sided) guide rollers 13 are provided on a vertical shaft 12 erected on an arm 11, which is a U-shaped rail 6 or 6 having a base end fixed to the sub-platform positioning portion 5a, so as to be pivotally supported by being separated from the rollers 7 and 7, similarly to the rollers 7 and 7.

Further, slide guides 14 and 14 are provided at the front ends of the fixed shafts 8 and 8 of the rollers 7 and 7 so that the sub-deck extending/moving portion 5b can slide smoothly with respect to the sub-deck positioning portion 5 a.

Further, a front lock plate 15a and a rear lock plate 15b are provided at front and rear sliding positions on respective outer surfaces of a left side portion 5b11 and a right side portion 5b12 of an extension moving unit frame 5b1 of a sub deck extension moving unit 5b, and a lock mechanism 16 engaged with the front lock plate 15a and the rear lock plate 15b is provided on respective outer surfaces of a left side portion 5a11 and a right side portion 5a12 of a fixed unit frame 5a1 of the sub deck fixing unit 5a so as to be coupled to each other.

Next, a description will be given of the sub-deck positioning portion 5a and the lock mechanism 16 at the front and rear sliding end positions of the sub-deck extending moving portion 5b, in which the shaft tube 17b of the lock lever 17 is rotatably supported by the support shaft 18 on the rear outer surfaces of the left side portion 5a11 and the right side portion 5a12 of the positioning portion frame 5a1 of the sub-deck positioning portion 5a, the plate portion 17a of the lock lever 17 is provided with a coupling hole 19 centered on the support shaft 18, the shaft 20 having both ends supported by the left side portion 5a11 and the right side portion 5a12, and the pin 22 provided at the front end of the rotation coupling portion 21 having the base end integrally provided are coupled to the coupling hole 19 in an engaging manner, and the shaft 20 is provided with a tensile force by the left side portion 5a11 being rotated in one direction by the coil spring 23. The pin 22a is a retreating hole for pivoting the pin 22, and is opened in the left side portion 5b11 and the right side portion 5b 12.

In the plate portion 17a of the lock lever 17, a front tilt plate 25a is connected to the front lock plate 15a and a rear tilt plate 25b is connected to the rear lock plate 15b on the outer surfaces of the left side portion 5b11 and the right side portion 5b12 of the extension moving portion frame 5b1 of the sub deck extension moving portion 5b such that the front lock pin 24a and the rear lock pin 24b, which are provided at the same distance from the support shaft 18 in the front-rear direction, are engaged with the front lock plate 15a or the rear lock plate 15b at the front-rear sliding end positions of the sub deck extension moving portion 5 b.

With the above-described configuration, the lock is positively applied by the coil spring 23 at the front and rear manually sliding ends of the sub-deck extending movable portion 5b, and even if an external force is applied during the raising and lowering of the deck 2 or during the stop of the raising and lowering, the sub-deck extending movable portion 5b does not move forward and backward.

When the lock mechanism 16 is unlocked, the lock lever 17 is pushed in a direction to release the front lock pin 24a or the rear lock pin 24b engaged with the front lock plate 15a or the rear lock plate 15b, whereby the front lock pin 24a and the rear lock pin 24b of the lock lever 17 are disengaged, and the hand is placed at a predetermined hand placement position of the sub deck extension moving portion 5b and pushed or pulled, that is, can slide forward and backward.

When the lock of the lock mechanism 16 is released, the lock lever 17 is pushed, and at a position where the front lock pin 24a or the rear lock pin 24b of the lock lever 17 is disengaged from the front lock plate 15a or the rear lock plate 15b, even if the pushing operation is stopped, the coil spring 23 returns to the lock position, and collides with the forward inclined plate 25a or the backward inclined plate 25b, and passes through while rotating around the support shaft 18 against the urging force of the coil spring 23, and is returned by the urging force of the coil spring 23 after passing through, and in the embodiment, the front lock pin 24a is connected to the carrier 26 provided at the upper edge of the rear portion of the left side portion 5a11 of the sub deck positioning portion 5a, and the lock lever 17 is stopped at the lock position. When the rear lock pin 24b of the lock lever 17 engages with the rear lock plate 15b, the same operation is performed.

As described above, the lock lever 17 has an automatic lock structure because the front lock pin 24a or the rear lock pin 24b is operated along the inclination of the forward inclination inclined plate 25a or the rearward inclination inclined plate 25b at the slide front and rear end positions of the sub deck extending moving portion 5 b.

The main deck 4 of the deck 2 according to the present embodiment is configured such that the front end portion 27a and the rear end portion 27b of the main floor 27 are fixedly attached to the main deck frame 4a by screws 28.

The sub-deck positioning section 5a of the sub-deck 5 included in the deck 2 according to the present invention is attached to the fixed section floor 29 and is mounted on the elevation mounting shaft 30, and the rear end portion 29b of the elevation mounting shaft 30 is fitted into the mounting shaft hole 30a of the fixed section frame 5a1 and is mounted to be movable up and down.

The sub-deck extension moving part 5b formed in the sub-deck 5 is attached to the extension moving part floor 31 and is mounted on the elevation mounting shaft 32, and the rear end part 31b of the elevation mounting shaft 32 is fitted into the mounting shaft hole 32a of the extension moving part frame 5b1 and is mounted to be movable in an elevation direction.

The fixed floor 29 has a relay board 33 attached to a front end portion 29a thereof, and floor connection level difference eliminating means 34 for eliminating the level difference between the front end portion 29a and a rear end portion 27b of the main floor 27.

The extension/movement floor 31 is provided with floor slide guide means 36 having guide plates 35a and 35b attached to the rear surfaces of both sides of the front edge side 31a thereof and the stationary floor 29, and slidably connecting the inner edges of the guide plates 35a and 35b to the left and right outer edges 29c1 and 29c2 of the stationary floor 29.

The stationary floor 29 has a surface slide belt plate 37 that slides on the floor 31 of the extension traveling part in the center part and the left and right side edge parts 29c1, 29c2 of the surface thereof, and has a sliding means 38 for the floor of the extension traveling part.

The stationary floor 29 is provided with a back surface slide plate 39 that slides with the main floor 27 at least at left and right side edges of the back surface thereof, and is provided with stationary floor sliding means 40.

The lifting carriage 41 provided in the housing case 3 has base ends pivotally supported by support shafts 44 and 45, and vertically opposite quadrangular links 46 and 47, the main platform 4 being pivotally supported by the front ends of the quadrangular links 46 and 47, and the base ends being pivotally supported by an operating lever 50 integrally with the support shafts 44 by the advancing and retreating operation of a piston 49 of a cylinder device 48 provided on the lifting carriage 41, and the support shafts 44 and 45 being pivotally supported by brackets 42 and 43 provided on both side edges near the rear ends thereof so as to be rotatable with respect to the support shafts 44 and to be rotated with respect to the entire quadrangular links 46 and 47 to maintain the posture of the platform 2 constant and to be lifted and lowered.

The housing case 3 is provided with a rail 51 and a rack 52 extending in the front-rear direction, the roller 53 of the elevating carriage 41 is connected to the rail 51, the pinion 54 is engaged with the rack 52 in a recessed manner, and the elevating carriage 41 is configured to move forward and backward by the rotation of the carriage motor 55.

The sub-stage positioning portions 5a of the sub-stage 5 are coupled to the main stage 4 so as to be slidable at two points in front and rear. That is, the rollers 56, 56 pivotally supported at the left and right side portions of the front end portion of the sub-deck fixing portion 5a are connected to the rail portions 57, 57 provided on the main deck 4, and the rollers 58, 58 pivotally supported by projecting inward from the left and right side portions of the rear end portion of the main deck 4 are fitted to the U-shaped rails 6, 6 of the left side portion 5a11 and the right side portion 5a12 of the fixing portion frame 5a1 provided on the sub-deck fixing portion 5a in the outward front-rear direction, so that the sub-deck fixing portion 5a is configured on the main deck 4 to be slidable forward and backward.

The rack 59 having a sliding length provided at the side of the sub-table positioning section 5a in the front-rear direction is engaged with a pinion 61 of a main table driving mechanism 60 provided in the main table 4, and the sub-table positioning section 5a is configured to be slidable in the front-rear direction in the rotation direction of the pinion 61.

Since the extension device 1 of the platform for the vehicular elevating device according to the embodiment of the present invention is configured as described above, when the trolley motor 55 is operated and the pinion 5 is rotated to the left side, the elevating trolley 41 moves from the position indicated by the broken line in fig. 3 to the position indicated by the solid line along the rack 52 and the rail 51, and the platform 2 of the quadrangular links 46 and 47 mounted on the elevating trolley 41 projects the sub platform 5 outward from the storage case 3 toward the upper side of the main platform 4 in the heavy storage state.

Next, when the main deck driving mechanism 60 is operated to rotate the pinion 61 to the right, the rack 59 is projected rearward, and the sub deck positioning portion 5a of the sub deck 5 supporting the rack 59 is guided to the rail portion 57 and the roller 57 of the main deck 4 and projected rearward, whereby the deck 2 having a normal length constituted by the main deck 4 and the sub deck 5 is constituted as shown in fig. 4.

Since the sub-deck extension movement portion 5b of the sub-deck 5 and the sub-deck positioning portion 5a are in a stacked state, the surface of the extension movement portion floor 31 of the sub-deck extension movement portion 5b and the surface of the main floor 27 of the main deck 4 are configured to be flush with each other. The rear end portion 27b of the main floor 27 of the main deck 4 and the front end portion 29a of the fixed portion floor 29 of the sub deck fixed portion 5a are connected to each other by a relay plate 33 attached to the front end portion 27 a.

In a state where the stage 2 having a normal length and constituted by the main stage 4 and the sub stage 5 is projected, the cylinder device 48 is operated to advance and retreat the piston 49, and the piston is rotated around the support shafts 44 and 45 to the rectangular links 46 and 47 to be lifted and lowered on the stage 2.

When the length becomes insufficient in the normal length formed by the main deck 4 and the sub deck 5, the lock lever 17 of the lock mechanism 16 is pushed down downward, and is turned downward about the support shaft 18 to the rear lock pin 24b, and the engagement with the rear lock plate 15b is released, so that the upper side of the rear lock pin 24b passes through the rear lock plate 15b and the backward inclined plate 25b of the sub deck extending moving portion 5b, and the sub deck extending moving portion 5b is slid backward, and the rear stopper 15c at the front end portion of the sub deck extending moving portion 5b is brought into collision with the front roller 7 of the sub deck fixing portion 5a, and the sliding of the extending moving portion floor 5b backward is stopped. The front lock pin 24a of the sub-deck positioning unit 5a is engaged with the front lock plate 15a to stop the forward sliding.

Then, the forward tilt plate 25a of the sub-deck extending movable portion 5b is caused to collide with the front lock pin 24a, and the forward tilt plate 25a is rotated upward against the coil spring 23 to pass through, and after passing, the front lock pin 24a is resiliently biased by the spring action of the coil spring 23, and engages with the front lock plate 15a to stop the forward sliding of the sub-deck extending movable portion 5b, and lock the sub-deck extending movable portion 5b in the extending movable state.

The sub-deck extension/movement section 5b slides rearward, and the fixed section floor 29 of the sub-deck fixing section 5a is configured to be lowered between the surfaces of the extension/movement section floor 31 and the main floor 27 of the main deck 4 so as to be flush with each other.

The table 2 of the present invention is adapted to highly urgent transportation such as a long object, particularly a moving bed, by raising and lowering the sub-table extending/moving unit 5b in a state of extending and moving relative to the sub-table positioning unit 5 a.

In the platform 2 of the present invention, the front and rear floor surfaces are formed to be flush with each other even in the case of normal and extended movement, and therefore, the object can be stably transported.

In the platform 2 of the present invention, even in the operation of returning to the normal length, the lock lever 17 of the lock mechanism 16 is pushed down, the front lock pin 24a is rotated upward about the support shaft 18 to release the engagement with the front lock plate 15a, the sub-platform extending moving part 5b is slid forward below the front lock pin 24a by the front lock plate 15a and the forward tilt plate 25a of the sub-platform extending moving part 5b, the U-shaped rails 9 and 9 of the extending moving part frame 5b1 are guided to slide as described above by the rollers 7 and 7 of the fixed part frame 5a1 and the guide roller 13, the extending moving part floor 31 is advanced by connecting the guide plates 35a and 35b to the outer edge portions 29c1 and 29c2 of the fixed part floor 29, the forward tilt plate 25a of the rear end portion of the sub-platform extending moving part 5b collides with the front lock pin 24a, and the forward tilting plate 25a is turned upward against the biasing force of the coil spring 23 to pass through, and the front lock pin 24a resiliently biased by the biasing force of the coil spring 23 automatically engages with the front lock plate 15a of the sub-platform extending/moving portion 5b at the time of passing through, whereby the sub-platform extending/moving portion 5b can be easily locked at the original position.

Even when the platform 2 according to the embodiment of the present invention is stored in the vehicle, the pinion 61 is rotated leftward by the main platform motor 60 to advance the rack 59, and the sub-platform positioning portion 5a is advanced together with the sub-platform extending portion 5b, and the positioning portion floor 29 of the positioning portion frame 5a1 is mounted on the main floor 27 together with the extending portion floor 31 with the relay board 33 as the leading end. Since the rear end portion 29b of the fixed portion floor 29 and the rear end portion 31b of the extended movable portion floor 31 are both attached to the lifting/lowering mounting shafts 30 and 32, they can be lifted and lowered freely and stored in a lifted and stacked manner.

As described above, in the extension device of the platform for the vehicular elevating device according to the present invention, when the trolley motor 55 is operated and the pinion 54 is rotated rightward, the elevating trolley 41 moves from the position shown by the solid line in fig. 3 to the position shown by the broken line along the rack 52 and the rail 51, the sub platform 5 moves above the main platform 4 mounted on the quadrangular links 46 and 47 of the elevating trolley 41, and the platform 2 in the stacked and stored state is stored in the storage case 3.

The present invention is not limited to the social utilization, and is applicable to elevators other than the cargo and underfloor elevators, that is, elevators each including a platform positioning portion and a platform extending/moving portion having a predetermined width and being lifted by a rectangular link.

(availability in industry)

The invention provides an extension device of a platform for a vehicle lifting device, which is a miniaturized mechanism, can extend the platform when necessary, and expand a conveyed object to various long cargoes which cannot be conveyed in the past.

Claims (4)

1. An extension device for a platform for a vehicle lifting device, comprising: a platform which is driven by electric power or oil pressure to automatically lift and has a main platform for carrying a movable sickbed or long goods and a secondary platform which is connected with the main platform in a freely sliding way and is combined with the main platform; the auxiliary platform is composed of an auxiliary platform positioning part and an auxiliary platform extension moving part; in the vehicle lifting device in which the sub-deck extension moving unit and the sub-deck positioning unit are provided with locking mechanisms for locking at a fixed position and an extended moving position, the deck is provided so that an extended moving unit floor of the sub-deck extension moving unit is superposed on and above a fixed unit floor of the sub-deck positioning unit, thereby forming a general use length, and is configured so that the sub-deck extension moving unit is relatively slid from the sub-deck positioning unit in a deck projecting direction, thereby extending a required length of the deck.

2. The extension device of a platform for a vehicular elevating device according to claim 1, wherein the sub-platform positioning portion is spaced apart in front and rear directions from inner surfaces of left and right side portions of the positioning portion frame, and is disposed with a roller being axially supported by a fixed shaft having base ends fixedly provided thereto; the auxiliary platform extending and moving part is provided with a U-shaped track which is opened towards the outside on each outer surface of the left side part and the right side part of the extending and moving part frame, is embedded with the roller of the fixed part frame, is combined in a mode of moving towards the front and back sliding direction, and extends and moves the using length of the auxiliary platform according to the requirement; the lock mechanism is configured such that a front lock plate and a rear lock plate are provided at front and rear sliding positions on respective outer surfaces of a left side portion and a right side portion of the extension moving portion frame, the front lock plate and the rear lock plate are engaged with each other, and the lock mechanism is coupled to the respective outer surfaces of the left side portion and the right side portion of the positioning portion frame.

3. The extension device for a platform of a vehicular elevating device according to claim 2, wherein a fixed portion floor is provided on the sub-platform fixed portion, and an extended moving portion floor is provided on the sub-platform extended moving portion, so that each rear end portion is attached to an elevating mounting shaft to be integrally elevated.

4. The extension device of a platform for a vehicular elevating device according to claim 2 or 3, wherein a lock lever is pivotally supported by a support shaft at a desired angle to an outer surface of each of rear portions of a left side portion and a right side portion of the fixed portion frame, a plate portion of the lock lever is provided with a coupling hole centered on the support shaft, a shaft having both ends supported by the left side portion and the right side portion and a pin provided at a front end of a rotational coupling portion integrally provided with a base end are coupled to the coupling hole with clearance fit, and the shaft having both ends supported by the left side portion and the right side portion is provided with tension by being rotated in one direction by a coil spring at the left side portion or the right side portion; the plate portion of the locking lever is provided on the outer surface of each of the left and right side portions of the extension moving portion frame so that a front locking pin and a rear locking pin, which are provided at equal distances in the front-rear direction about a support shaft, are engaged with the front locking plate or the rear locking plate at the front-rear sliding end positions of the sub-deck extension moving portion, and a front tilt plate is connected to the front locking plate and a rear tilt plate is connected to the rear locking plate.