JPH0430812A - Bed device - Google Patents

Abstract

PURPOSE:To facilitate dismounting of a driving mechanism from a frame by a method wherein a bed plate on the head side is provided on a frame rotatably and ascendably, a rotating and operating arm is fixed to a rotary shaft on the head side, a rotating and driving arm is fixed to a middle part of another rotary shaft and a specific driving mechanism is held detachably by this pair of rotary shafts. CONSTITUTION:In a frame 1, a plurality of bed plates 5, 6, 7 and 8 are provided, and a driving mechanism 26, which is held detachably by rotary shafts 11 and 12 provided rotatably on the bed plates 5 and 7 respectively, has a thin case body 27 which is opened on an upper surface side, an upper surface central lid member 28 and a pair of movable lid members 29 of the case body 27, the latter members of which close both side parts of the case body 27 in an upper surface longitudinal direction. If the pair of movable lid members 29 of the case body 27 are put off by making to slide outwardly and the case body 27 is made to go down, the case body 27 can be removed easily from the first and second rotary shafts 11 and 12. In this constitution, the driving mechanism 26 can be removed easily from the frame 1, whereby repairing work of the driving mechanism 26 is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a rise-up bed device in which a floor plate provided on a frame is rotated and raised.

(Prior Art) In general, this type of rise-up bed device has a floor plate provided on a frame divided into a plurality of parts, and at least one of the floor plates is placed on the upper body side of a user such as a sick person who lies supine via a pinerest. The part is rotatably supported on the frame,
This rotatably supported floor plate can be driven in the upward direction by a drive mechanism. The floorboard is operated by a user lying supine on the floorboard using a remote switch connected to the drive mechanism.

Therefore, it is extremely useful for users such as sick people who are unable to get up by cutting themselves.

The above-mentioned rise-up bed device is, for example,
No. 0204 (Utility Model Application Publication No. 57-134026) is representative. This get-up bed device has a frame with a first
The second floor plate on the head side is constructed by constructing a second floor plate, fixing the first floor plate on the leg side to the frame, and rotatably connecting one end side of the first and second floor plates. An operating arm having one end fixed to one end surface extends toward the lower surface of the first floor plate, and the other end of the operating arm is connected to a drive mechanism provided on the lower surface of the first floor plate. This drive mechanism is configured to slide within an inner cylinder or an outer cylinder via a speed reducer and a forward/reverse rotating motor, and the tip of the inner cylinder is connected to one end of the operating arm with a pin. Further, the drive mechanism is pivotally attached to a mounting member fixed to the lower surface of the first floorboard by means of a pin or the like.

In the rise-up bed device having the above configuration, when the forward/reverse rotating motor of the drive mechanism is driven to slide the inner cylinder in the extending direction, the second P floor plate is rotationally driven via the operating arm. .

(Problems to be Solved by the Invention) However, with the rise-up bed device having the above configuration,
For example, if the drive mechanism breaks down for some reason and the drive mechanism needs to be inspected and repaired, the work may be difficult because the drive mechanism is installed on the underside of the floorboard. Therefore, even if only the drive mechanism is taken out for inspection and repair, it is necessary to first remove the pins etc. from the mounting member and then to release the connection between the inner cylinder and the operating arm, which is still a time-consuming and labor-intensive task. There is a problem of sluggishness. Further, in this case as well, the above operation requires a tool to release the connection, and there is a problem that even a male cannot easily remove the drive mechanism. Further, as described above, the drive mechanism is attached to the bed using pins or the like, so it is assembled into the bed at the factory. This drive mechanism is heavy because it includes a motor, reducer, etc.
A bed incorporating this drive mechanism is heavy, and there is a problem in transporting it.

The present invention has been made based on the above-mentioned circumstances, and its purpose is to provide a rise-up bed device that solves the above-mentioned problems by allowing the drive mechanism to be easily attached to and detached from the bed frame. It is in.

(Summary of the Invention) In order to achieve the above object, the present invention includes a frame, a floor plate is provided on the frame divided into a plurality of parts, and the floor plate on the head side of the bed device is provided so as to be able to rotate and rise. A pair of rotary shafts are rotatably provided on the frame, and an actuating arm is fixed to at least the head-side rotary shaft, and a rotary wheel rotatably provided on one end side of the rotary shaft contacts the lower surface of the head-side floorboard, and The rotation drive arm is fixed to the middle part of the rotation shaft, and the -
A driving mechanism is detachably held on a pair of rotating shafts, and the driving mechanism is connected to a box-shaped case body with an open top and a bottom, and a case body that can be opened and closed on both sides in the longitudinal direction of the top surface of the case body. a pair of movable lids, a central lid that closes the center portion of the upper surface of the case body in the longitudinal direction, a pair of notches formed on both longitudinally upper sides of the case body; A drive source including a rotary motor, a guide member provided inside the case body, and a guide member provided within the guide member that slides within the guide member when driven by the drive source and extends in the longitudinal direction of the case body toward the end side. - a movable member that expands and contracts, the drive source is driven to extend the movable member from the guide member, the movable member rotates the rotary drive arm, and as the rotary drive arm rotates, By rotating the rotating shaft and rotating the operating arm upward as the rotating shaft rotates, the floor plate on the head side is rotated upward.

The drive mechanism is held by a pair of rotating shafts of the frame, and the drive mechanism can be easily removed from the frame by removing the movable lid of the drive mechanism from the case body.

(Example) Hereinafter, an example of the present invention will be described based on the drawings. 1 in the figure is a frame. This frame 1 has a rectangular frame shape, with a pair of side members 2 and 2 facing each other and a horizontal member 3 connected to one end in the longitudinal direction, and a horizontal member 4 connected to the other part. The frame 1 is provided with a first floor plate 5, a second floor plate 6, a third floor plate 7, and a fourth floor plate 8, which are divided in the longitudinal direction. The second floor plate 6 is fixed to the frame, and the first floor plate 5 located on the head side of the bed device has one end fixed to both sides of one end located on the second floor plate 6 side, and the other end side or the second floor plate 5 They are rotatably connected by connecting members 9, 9 fixed to both sides of one end of the floor plate 6. Similarly, the third floorboard 7 is rotated by connecting members 9, 9, which have one end fixed to both sides of one end located on the second floorboard 6 side and the other end fixed to both sides of one end of the second floorboard 6. They are movably connected. The fourth floorboard 8 has one end fixed to both sides of one end located on the third floorboard 7 side, and the other end rotatably connected to the third floorboard 7 by connecting members 9, 9 fixed to the third floorboard 7. It is provided. Side members 2, 2 of the frame 1
A support plate 10.10 is fixed to the lower surface side of the substantially center in the longitudinal direction. And, between the support plates 10° and 10 on the lower surface side of the first floor plate 5, a first support plate along the width direction of the frame 10 is provided.
A rotating shaft 11 is rotatably provided, and a second rotating shaft 12 extending along the width direction of the frame is rotatably provided between the support plates 10 and 10 on the lower surface side of the third floor plate 7.

A link 13 is attached to the end of one end of the support plate 10.10.
One end of the link 13.13 is rotatably connected, and the other end of the link 13.13 is pivotally connected to the fourth floor plate 8.

One end side of a pair of first operating arms 14, 14 is fixed near the side members 2, 2 of the first rotating shaft 11.

This first actuating arm 14.14 rotates as the first rotating shaft 11 rotates. Said first actuation arm 14.14
A wheel 15.15 is rotatably provided on the other end side, and this wheel 15.15 is in contact with the lower surface of the first floor plate 5 which is in a horizontal state.

One end side of a pair of second operating arms 16.16 is fixed near the side member 2.2 of the second rotating shaft 12.

This second actuation arm 18.18 rotates as the second rotation shaft 12 rotates. Said second actuation arm 16. IE
A wheel 17.17 is rotatably provided on the other end side of i,
This wheel 17°17 is the third floor plate 7 which is in the horizontal state.
It is in contact with the bottom surface of. Further, a protrusion 1 protruding from one end of the wide boss 18 is provided in the middle of the first rotating shaft 11.
The first rotary drive arm 2o having a numeral 9 has the first rotary shaft 11 inserted through the boss 18, and is fixed to the first rotary shaft 11 with a screw 21.

The tip of the protrusion 19 is located below the first rotating shaft 11 and is attached to the frame I facing toward the leg side. As will be described later, the first rotating shaft 11 rotates as the first rotary drive arm 200 rotates.

Similarly, in the middle of the second rotation shaft 12, at the same position as the first rotation drive arm 20 fixed to the first rotation shaft 11, there is a protrusion projecting from one end of the wide boss 22. A second rotary drive arm 24 having a portion 23 is fixed to the second rotary shaft 12 by pushing the second rotary shaft 12 through the boss 22 with a screw 25 . The tip of the protruding portion 23 is located below the second rotating shaft and is attached to the frame facing toward the head. As the second rotary drive arm 24 rotates, the second rotating shaft 12 rotates. A drive mechanism 26 is detachably held on the first and second rotating shafts 11.12. The drive mechanism 26
The case body 27 has an elongated box-like shape with an open top and has a bottom, a central lid body 28 that closes the central portion of the top surface of the case body 27 in the longitudinal direction, and both sides of the top surface in the longitudinal direction excluding the central lid body 28. A pair of movable lids 29 that open and close the
．． 29. First and second drive sources 30 and 31 are fixed to both sides of the case body 27 on the outside of the approximately center portion thereof in the longitudinal direction so as to protrude outward, and are covered by the protruding covers of the case body 27, respectively. . Although not shown in detail, each of the eleventh and second drive sources 30 and 31 includes a forward and reverse rotation motor. The first driving source 3
A first driving worm 32 is provided inside the case body 27 in a direction perpendicular to the case body 27 from 0.

A first worm engaged with the first drive worm 32 is provided with a gear 33 on the case body 27 . This first worm gear 33 has one end connected to the shaft support member 3.
4, the other end of which is rotatably supported by the first
The shaft receiver is rotatably supported by the portion 35 and fixed to a first threaded shaft 36 provided along the longitudinal direction of the case body 27 toward one longitudinal end.

Therefore, this first threaded shaft 36 is connected to the first drive source 3
0, and by driving this first drive source 30, it rotates via a first drive worm 32 and a first worm gear 33. A square-shaped first nut 37 is screwed into the first threaded shaft 36, and this first nut 37 is fixed to the inner peripheral surface of one longitudinal end of a square-cylindrical first moving member 38. ing. A notch 39 is formed on the bottom surface of the first moving member 38, which has a rectangular cylindrical shape, except for both ends in the longitudinal direction.

The first movable member 38 has a rectangular tube shape with one end open, and is slidably inserted into a first guide member 40 that extends to a midway point on one end side in the longitudinal direction of the case body 27. The first shaft support part 34 supporting one end side of the first threaded shaft 36 is fixed on the inner bottom surface of the open end side of the first guide member 40, and
The upper end of the first shaft receiving portion 34 is located slightly lower than the upper inner surface of the first moving member 38.

Further, the first guide member 40 is fixed to the inner bottom surface of the case body 27. Therefore, when the first drive source 30 is activated, the first screw shaft 36 rotates via the first drive worm 32 and the first worm gear 33. Accompanying first nut 3
7 moves along the first threaded shaft 36 and this first
The first moving member 38 slides within the first guide member 40 together with the nut 37, and this first moving member 38 extends toward one end of the case body 27 in the longitudinal direction. Conversely, if the motor of the first drive source 30 is rotated in the opposite direction, the first moving member 38 is shortened into the first guide member 40 .

Similarly, from the second drive source 31, a second drive worm 4 is inserted into the case body 27 in a direction perpendicular to the case body 27.
1 is provided. A second worm gear 42 engaged with the second drive worm 41 is provided within the case body 27. One end of the second worm gear 42 is rotatably supported by the shaft support member 34, and the other end of the second worm gear 42, which is shaped like an abbreviated character, is rotatably supported by a portion 43. It is fixed to a second threaded shaft 44 that is provided along the longitudinal direction toward the opposite side of the first threaded shaft 36 . Therefore, this second threaded shaft 44 is disposed perpendicularly to the second drive source 31, and by driving the second drive source 31, the second drive worm 41 and the second worm gear 42 are driven. It will rotate through. A square-shaped second nut 45 is screwed into the second threaded shaft 44, and this second nut 45 has a square tube shape and is attached to the inner circumferential surface of one longitudinal end of the second moving member 46. It is fixed.

A notch 47 is formed at the bottom of the second moving member 46, which has a rectangular cylindrical shape, in the middle of the second moving member 46 except for both ends in the longitudinal direction. The second movable member 46 has a rectangular tube shape with one end open and extends to the middle of the other end in the longitudinal direction of the case body 27.
The guide member 48 is slidably inserted into the guide member 48 . A second shaft supporting one end side of the second screw shaft 44
The shaft receiver part 43 is fixed on the inner bottom surface of the open end side of the second guide member 48, and is located in the notch part 47 of the second moving member 46, and this second shaft receiver is The upper end of the portion 43 is located slightly lower than the upper inner surface of the second moving member 46.

The second guide member 48 is fixed on the inner bottom surface of the case body 27. Therefore, when the second drive source 31 is activated, the second drive worm 41 and the second worm gear 42 are activated.
As the second screw shaft 44 rotates, the second nut 45 moves along the second screw shaft 44, and together with the second nut 45, the second screw shaft 44 rotates. The second moving member 46 is the second guide member 4
8, the second moving member 46 moves inside the case body 2.
7 toward the other end in the longitudinal direction.

Conversely, if the forward/reverse rotation motor of the second drive source 31 is rotated in the opposite direction, the second moving member 46 that has been extended will be shortened into the guide member 48 .

A central lid body 28 is removably provided in the central portion of the case body 27 excluding both sides of the open longitudinal upper surface thereof with a plurality of screws 49. Notches 28 al 28 are provided at the widthwise central portion on both sides of the central lid body 28 in the longitudinal direction.
a is formed. When assembling, repairing, inspecting, etc. the various members provided in the case body 27, the central lid body 28 is removed from the case body 27. A groove 50 of a predetermined length is formed toward the center in the longitudinal direction on the upper surface side of both sides in the longitudinal direction of the case body 27, and protruding pieces having a slightly wider width in the width direction are formed at the upper ends of both sides in the width direction of the case body 27. 51° 51 is formed to have a predetermined length toward the center in the longitudinal direction. Furthermore, below the groove 50, protrusions 52, 52, which are wider in the width direction than the protrusion pieces 51, 51, are formed with a predetermined length toward the center in the longitudinal direction. Further, at the upper side of the case main body 27, which is slightly closer to the center than both sides in the longitudinal direction, the first
, the second rotating shaft 11.12 is inserted. Approximately U-shaped notches 53, 53 are formed along the width direction.

The pair of movable lids 29, 29 are removably provided on both sides of the case body 27 in the longitudinal direction, and open and close the upper surfaces of the open case body 27 on both sides in the longitudinal direction. The movable lid body 29 has a rectangular plate shape, and a protrusion 29a that engages with a notch 28a formed in the central lid body 28 is formed at the center in the width direction on one end in the longitudinal direction. On both sides, grooves 29b, 29b are formed along the longitudinal direction in which the protruding pieces 51.51 formed on the case body 27 engage, and the lower part 29c engages with the groove 50 formed on the case body 27. do. Further, a recess 29d is formed in the center of the lower surface. Therefore, the movable lid 29 engages the protruding pieces 51, 51 formed on the case body 27 with the grooves 29b, 29b formed on the movable lid 29, and Case body 27
A movable lid 29 is formed in the notch 28a of the central lid 28 provided on the upper surface of the case body 27 by engaging with the groove 50 of the case body 27 and sliding it toward the center from both sides in the longitudinal direction of the case body 27. By engaging the protruding portion 29a, the movable lid body 29 is held securely to the case body 27.

First, move the pair of movable lid bodies 29 and 29 onto the case body 2.
7 and fixed to the first and second rotation shafts 11.12 from below the first and second rotation shafts 11.12 provided in the frame 1. The drive arm 2 sail 24 is accommodated in the case body 27, and the first and second rotating shafts 11, 12 are inserted into the case through a pair of notches 5 formed on both longitudinal sides of the case body 27.
353 and lift the case body 27 upward. Then, the pair of movable lids 29, 29 are slid on both sides in the longitudinal direction of the case body 27, and the movable lids 29, 29 are engaged and held with the case body 27.

At this time, the protrusion 19 of the first and second rotary drive arms 20.24 fixed to the first and second rotation shafts 11.12
．． The distal end portions of 23 are in contact with the longitudinal distal end portions of first and second moving members 38 and 46 provided within the case body 27, respectively. Moreover, each boss 18.22 of each rotary drive arm 20.24 fixed to each rotating shaft 11.12 does not come into contact with the moving member 29.29 due to the recess 29d formed on the lower surface of the movable lid 29.

Further, both ends of the boss 18.22 in the width direction are located between each pair of protrusions 52. The width is narrow (formed.

The first and second rotating shafts 11.12 are held between the notch 53.53 of the case body 27 and both sides of the lower surface of the movable lid 29°29 excluding the recess 29d.
A drive mechanism 26 is held on the second rotating shaft 11.12.

Further, in the drive device 26, both ends in the width direction of the bosses 18.22 of the rotation drive arms 20.24 fixed to the rotation shafts 11.12 are connected to each pair of protrusions 52 formed on the case body 27. .52, the movement of the drive mechanism 26 in the left and right direction is restricted by the rotation drive arms 20 and 24. Therefore, this drive mechanism 26 does not move not only in the front-back direction but also in the left-right direction (each rotating shaft 11...
It is held between 12 and 12.

According to the bed device having the above configuration, when the first drive source 30 including the forward and reverse rotation motor of the drive mechanism 26 is operated, the first drive source 80 is operated. The first drive worm 32 connected to the drive source 30 rotates, and as the first drive worm 32 rotates, the first worm gear 33 rotates. As it rotates, the first screw shaft 3
6 rotates. As the first screw shaft 36 rotates, the first screw shaft 36 and the first screw shaft 3
The first nut 37 screwed onto one end of the shaft 6 in the longitudinal direction moves toward the other end of the first threaded shaft 36 .

Along with this movement of the first nut 37, the first nut 37
The first movable member 38 to which is fixed slides within the first guide member 40 and extends toward one end in the longitudinal direction of the case body 27. Then, this first moving member 3
The protruding portion 23 of the first rotary drive arm 20 that was in contact with one end of the first rotary drive arm 8 in the longitudinal direction moves to the left as shown by the dashed line in FIG. It rotates around the rotation axis 11 of. As the first rotary drive arm 20 rotates, the first rotating shaft 11 rotates clockwise. Along with the rotation of this first rotating shaft 11,
A pair of first actuating arms 14.14, one end of which is fixed to both ends of the first rotating shaft 11, are connected to the first rotating shaft 1.
1, this first actuating arm 14.1
The other end of 4 will rise.

By the rotation of the first actuating arm 14, the rolling wheel 1 rotatably provided on the other end side of the first actuating arm 14
5 contacts and rolls on the lower surface of the first floor plate 5, thereby pushing the first floor plate 5 upward and one end side of the first floor plate 5 rises.

Similarly, by operating the second drive source 31, the second
The moving member 46 slides within the second guide member 48 and extends toward the other longitudinal end of the case body 27 . As the second moving member 46 expands, the protrusion 23 of the second rotary drive arm 24, which was in contact with the tip of the second moving member 46, moves to the position shown by the chain line in FIG.
The second rotary drive arm 24 rotates counterclockwise. As the second rotary drive arm 24 rotates, the second rotation shaft 12 rotates counterclockwise. This second rotating shaft 12
With the rotation, one end side of the pair of second actuating arms 16, 16 rotates upward. A roller 17. is rotatably provided at one end of the second actuating arm 16.16 which is rotated upward.
17 rolls while contacting the lower surface of the third floor plate 7, and the third
One end side of the floor plate 7 is rotated and raised. This third floorboard 7
As the fourth floor plate 8 rotates upward, one end side of the fourth floor plate 8, whose one end side is connected to the third floor plate 7 by a connecting member 9, rises. With this rise of one end side of the fourth floor plate 8, the frame 1
A pair of links 13, 13 provided in the holder rotate. As the pair of links 13, 13 rotate, the other end of the fourth floor plate 8 also rises to the state shown by the chain line in FIG. With the bed device in such a state, the user can obtain a comfortable posture. Also, conversely, each floorboard 5. 6.
In order to return the 7°8 from a comfortable state to a horizontal state, the first and second drive sources 30 and 31 are rotated in the opposite direction by rotating the forward and reverse rotation motors of the first and second drive sources 30 and 31, respectively. Third
, fourth floor plate 5. 6. 8 and the weight of the user, the 11th second and third floorboards 5 and 6°8 return to their original horizontal state.

In order to remove the drive mechanism 26 from the frame 1, the pair of movable lids 29, 29 engaged with both sides of the case body 27 in the longitudinal direction are slid outward.
If it is removed from the case body 27 and the case body 27 is lowered, the case body 27 will be attached to the first and second rotating shafts 11.
12, thereby allowing the drive mechanism 26 to be removed from the frame 1.

Therefore, when the drive mechanism 26 breaks down for some reason or during transportation, it is possible to easily repair the drive mechanism 26 by removing the drive mechanism 26 from the frame 1. By making it separate from 1, it has the advantage of being easier to transport. Furthermore, as described above, the drive mechanism 26 can be easily assembled to the frame 1 without the need for any tools, which is extremely convenient. Another embodiment shown in FIG.
This is the only bed device that rotates and rises. In this case, the drive mechanism 60 does not require a second drive source, a second guide member, or a second moving member, but the movable lid 62 or the case body 6
The notches 63 and 63 formed in 1. are formed in the same way as the case body described above, and the cutouts 63 and 63 formed in the first and second
The drive mechanism is held at the rotating shafts 64 and 65 of.

(Effects of the Invention) As described above, the present invention has the above-described configuration, and the rotary shaft is engaged with the notch formed in the case body of the drive mechanism, and the movable lid body is slid to be attached to the case body in the longitudinal direction. The drive mechanism can be assembled to the frame with a simple operation without requiring the same tools as those used to close both sides. In addition, the drive mechanism assembled to the frame can be removed from the frame by simply sliding the movable lid from the case body, so when repairing the drive mechanism or transporting the bed device, it is easy to remove. It is very convenient to remove the frame and drive mechanism and make them separate.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which FIG. 1 is a perspective view of a device according to the present invention, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG. 3 is an enlarged sectional view of the drive mechanism. Figure 4 is a perspective view of the drive mechanism, Figure 5 is a side view of a portion of the drive mechanism, and Figure 6 is a perspective view of the drive mechanism.
7 is a sectional view taken along the line C-C in FIG. 3, FIG. 8 is a sectional view taken along the line D-D in FIG. 3, and FIG. 9 is a sectional view taken along the line E in FIG. 3. A cross-sectional view taken along the line -E, and FIG. 10 is a cross-sectional view of a bed device showing another embodiment. 1...Frame 5-8...Floor plate 11...First rotating shaft 12...Second rotating shaft 14...First operating arm 15...Rolling wheel 20...No. 1 rotary drive arm 26...drive mechanism 27...case body 28...center lid 29...movable lid 30...first drive source 38...first moving member 40 ...First guide member 53...Notch part

Claims (1)

[Claims] a frame, a floor plate that is divided into a plurality of parts along the longitudinal direction of the frame and provided so that at least a floor plate on the head side of the bed device can rotate upward; and a floor plate that is provided on the frame so as to be rotatable in the width direction of the frame; One end side is fixed to both sides of the rotating shaft located at least on the head side of the bed device, and the other end side is rotatably provided with a roller. a drive arm whose rolling wheels abut against the lower surface of the floorboard on the head side of the bed device; a rotary drive arm fixed to a midway portion of the rotary shaft to which the drive arm is fixed; and a rotary drive arm that is detachably attached to the pair of rotary shafts. The drive mechanism includes a case body having a box-like shape with an open top and a bottom, and a central lid body that closes a central portion in the longitudinal direction of the open top surface of the case body. , a pair of movable lids that can be opened and closed on both longitudinal sides of the open upper surface of the case body excluding the central lid, a pair of notches formed on the upper sides of both longitudinal sides of the case body, and a pair of notches provided in the case body. a drive source including a forward and reverse rotation motor;
a guide member provided within the case body; and a guide member provided within the guide member that slides within the guide member in conjunction with driving of the drive source and is extendable and retractable toward one end in the longitudinal direction of the case body. By driving the drive source and extending the movable member from the guide member, the rotary drive arm fixed to the rotation shaft is rotated, and the rotation of the rotary drive arm is caused by the rotation of the rotary drive arm. A bed device characterized in that a floor plate on the head side of the bed device is rotated and raised by rotating a shaft and rotating and raising the operating arm as the rotation shaft rotates.