JP2015027914A - Remote control system for lift device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a remote control system for a lift device which prevents malfunction of the lift device due to an operation command signal from a terminal other than an authenticated remote control terminal, prevents a loss of the remote control terminal, and eliminates the burdensomeness of a charging operation for the remote control terminal.SOLUTION: In the remote control system for a lift device, an operation command signal for a drive control section wirelessly transmitted by an authenticated remote control terminal 3 can be received. The remote control system comprises a holder 4 to which the remote control terminal is detachably attached, and charging units 17 and 26 which are incorporated in the holder and the remote control terminal and charge rechargeable batteries 19, 19, and 19 contained in the remote control terminal when the remote control terminal is attached to the holder. A tag 25 in which identification information is stored is provided in the holder. A reader 14, which can read identification information in a non-contact manner and in which verification information for verification against the read identification information is stored, is provided in the remote control terminal.

Description

  The present invention authenticates a remote control terminal that performs wireless communication with a reception unit connected to a drive control unit of a lift device based on identification information of the remote control terminal, and the reception unit is configured such that the authenticated remote control terminal is wireless. The present invention relates to a remote control system for a lift device that can receive an operation command signal transmitted to the drive control unit.

  For example, Patent Literature 1 discloses a remote control system for a lift device that prevents the lift device from malfunctioning due to a mistake in the remote control terminals when a plurality of lift devices are remotely operated by respective remote control terminals. In the remote control system of Patent Document 1, a tag is provided on a remote control terminal so that ID information can be transmitted wirelessly, while a remote control accommodation box capable of accommodating a remote control terminal is provided in the vicinity of the lift device. The storage box is provided with a reader that is connected to the drive control unit of the lift device and can receive ID information transmitted from the remote control terminal, and collates the received ID information with pre-stored collation information.

  When it is determined by the reader that the received ID information matches the verification information, the remote control terminal that has transmitted the ID information is authenticated, and the drive control unit transmits an operation command that is transmitted by the authenticated remote control terminal. Only the signal is received. By doing in this way, since the drive control part of each lift apparatus cannot receive an operation command signal from other than the remote control terminal corresponding to each lift apparatus, each lift apparatus is received by the operation command signal from other than the corresponding remote control terminal. Can be prevented from malfunctioning.

JP 2010-189118 A

  However, in the above-described remote control system, an operator may leave the remote control terminal in an arbitrary place after finishing the operation of the lift device by the remote control terminal. In such a case, if the operator forgets where the remote control terminal is left, the remote control terminal cannot be found, and thus the remote control terminal may be lost.

  In addition, the remote control terminal has a built-in rechargeable battery as a power source. When charging this rechargeable battery, it is necessary to attach the remote control terminal to a charger prepared at a location away from the remote control accommodation box. It was. In this way, since the worker has to move to a position away from the remote control accommodation box for charging the rechargeable battery, the worker may feel that charging the remote control terminal is troublesome. .

  The present invention has been proposed in view of such a situation, and it is possible to prevent the lift device from malfunctioning due to an operation command signal from other than the authenticated remote control terminal and to prevent the remote control terminal from being lost. An object of the present invention is to provide a remote control system for a lift device that eliminates the troublesome work of charging a remote control terminal.

  The remote control system for a lift device according to the invention of claim 1 authenticates a remote control terminal that performs wireless communication with a reception unit connected to a drive control unit of the lift device based on identification information of the remote control terminal, and In a remote control system of a lift device that can receive an operation command signal for the drive control unit that is wirelessly transmitted by the authenticated remote control terminal, a holder to which the remote control terminal is detachably mounted, the holder, and the holder A charging unit that is built in a remote control terminal and charges a rechargeable battery built in the remote control terminal when the remote control terminal is mounted on the holder, and stores the identification information in the holder. A tag is provided, and the remote control terminal can read the identification information in a contactless manner. A reader that stores collation information to be collated, and when the identification information read by the reader matches the collation information, the reader authenticates a remote control terminal that performs wireless communication with the receiving unit. It is characterized by.

  According to a second aspect of the present invention, in the first aspect, the charging unit is built in the remote control terminal and is connected to the rechargeable battery, and is built in the holder, and is connected to the holder by a power line. A power transmission terminal connected to the control power source of the drive control unit, and contacting the power reception terminal to supply power from the control power source to the power reception terminal, and the remote control terminal authenticated by the reader; One of the holders modulates the operation command signal into a communication signal for power line carrier communication on the condition that the power transmission terminal is in contact with the power receiving terminal of the authenticated remote control terminal, and the communication signal Is superimposed on the power line, and the lift device takes in the communication signal superimposed on the power line and demodulates it into the operation command signal. A demodulating unit for wired communication of the command signal to the receiving unit is provided, and the authenticated remote control terminal is provided with a wired communication priority unit that prioritizes the wired communication for the receiving unit over the wireless communication for the receiving unit It is characterized by that.

  According to a third aspect of the present invention, in the first aspect, the charging unit is built in the remote control terminal and is connected to the rechargeable battery, and is built in the holder, and is connected to the holder by the power line. A power transmission terminal connected to the control power source of the drive control unit, and contacting the power reception terminal to supply power from the control power source to the power reception terminal, and the remote control terminal authenticated by the reader; One of the holders modulates the operation command signal into a communication signal for power line carrier communication on the condition that the power transmission terminal is in contact with the power receiving terminal of the authenticated remote control terminal, and the communication signal Is superimposed on the power line, and the lift device takes in the communication signal superimposed on the power line and demodulates it into the operation command signal. A demodulator for wired communication command signal to the receiving unit, a selection unit for selecting one of said wired communication with the wireless communication with the reception unit, characterized in that is provided.

  According to a fourth aspect of the present invention, in the first aspect, an engagement convex portion that protrudes to the other is formed on one of the remote control terminal and the holder, and the other is engaged with the engagement convex portion. An engagement recess is formed, and one of the engagement projection and the engagement recess is made of a magnetic material, and the other is a magnet that can be attracted to the other. It is characterized by that.

  According to a fifth aspect of the present invention, in the first or fourth aspect, the charging unit is embedded in the remote control terminal and connected to the rechargeable battery, and is embedded in the holder, and the power receiving unit uses electromagnetic induction. And a power transmission coil that transmits power to the coil in a non-contact manner.

  According to a sixth aspect of the present invention, in any one of the first to fifth aspects, a support mechanism for supporting the holder so as to be lifted and lowered is provided.

According to the remote control system of the lift device according to the first aspect of the present invention, it is possible to charge the rechargeable battery built in the remote control terminal by the charging unit with the remote control terminal mounted on the holder. Therefore, unlike the conventional case, there is no need to move to a position away from the holder in order to charge the rechargeable battery of the remote control terminal, so the troublesome work of charging the remote control terminal can be eliminated. Furthermore, after the operation of the lift device by the remote control terminal is completed, the storage location of the remote control terminal can be fixed by mounting the remote control terminal on the holder for charging. Thereby, loss of the remote control terminal can be prevented.
In addition, the receiving unit connected to the drive control unit of the lift device can receive the operation command signal transmitted by the authenticated remote control terminal wirelessly, and therefore, the lift can be lifted by the operation command signal from other than the authenticated remote control terminal. It is possible to prevent the device from malfunctioning.
According to the second aspect of the present invention, it becomes possible to perform wired communication of the operation command signal from the authenticated remote control terminal to the receiving unit of the lift device.
Furthermore, since the operation command signal can be transmitted to the receiving unit of the lift device by wired communication having higher communication reliability than wireless communication, the lift device can be reliably operated by the operation command signal.
According to the third aspect of the present invention, it becomes possible to perform wired communication of the operation command signal from the authenticated remote control terminal to the receiving unit of the lift device.
Furthermore, even if a problem occurs in one of the wireless communication and the wired communication, the other communication method (wired communication or wireless communication) can be selected by the selection unit. Therefore, the transmission reliability of the operation command signal to the receiving unit of the lift device is improved.
According to the invention of claim 4, the magnetic force of the magnet which the engaging convex portion and the engaging concave portion are engaged, and one of the engaging convex portion and the engaging concave portion has the other different from the one. This one and the other can be brought into close contact with each other. Along with this, the remote control terminal can be attached in close contact with the holder, so that the remote control terminal can be prevented from falling off the holder.
According to the invention of claim 5, the remote control terminal incorporates the power receiving coil connected to the rechargeable battery, and the holder incorporates the power transmission coil that transmits power in a non-contact manner to the power receiving coil. The charged part is not exposed. Thereby, the rechargeable battery of the remote control terminal can be charged safely.
According to the sixth aspect of the present invention, when the holder is raised and lowered by the support mechanism, the position of the holder can be arbitrarily adjusted in the raising and lowering direction.

It is a block diagram of the remote control system of the lift for vehicle maintenance of Embodiment 1 of this invention. (A) is a perspective view of a remote control terminal provided in the remote control system, and (b) is a rear view of the remote control terminal. It is a principal part longitudinal cross-sectional view of a remote control terminal and a holder in the state which mounted | wore the remote control terminal in the holder. It is a principal part perspective view of a holder. It is a principal part perspective view of the holder equipped with the remote control terminal. It is a block diagram of the remote control system of the lift for vehicle maintenance of Embodiment 2. It is a perspective view of the remote control terminal with which the remote control system of Embodiment 2 is provided. It is a principal part longitudinal cross-sectional view of the remote control terminal in the state which mounted | wore the remote control terminal of Embodiment 2 in the holder. It is a principal part perspective view of the holder of Embodiment 2. FIG. It is a principal part perspective view of the holder with which the remote control terminal of Embodiment 2 was mounted | worn. It is a block diagram of the remote control system of the lift for vehicle maintenance of Embodiment 3. It is a block diagram of the remote control system of the lift for vehicle maintenance of other embodiment.

<Embodiment 1>
Embodiment 1 of the present invention will be described with reference to FIGS. FIG. 1 shows a block diagram of a remote control system 1 for remotely operating a vehicle maintenance lift 2, which is an example of a lift device of the present invention, using a remote control terminal 3. The remote control system 1 includes a vehicle maintenance lift 2, a remote control terminal 3, and a holder 4.

  The vehicle maintenance lift 2 has a well-known configuration in which a drive-on plate on which a vehicle rides is moved up and down by a hydraulic cylinder, and includes a drive control unit 7 that controls driving of an electromagnetic valve, a pump, and the like of a hydraulic circuit. A lift control receiver 8 is connected to the drive controller 7. The lift control receiving unit 8 is used to transmit an operation command to the drive control unit 7 as described later. FIG. 1 illustrates the remote control system 1 provided with one vehicle maintenance lift 2, but there are some remote control systems provided with two or more vehicle maintenance lifts 2.

  As shown in FIGS. 2A and 2B, the remote control terminal 3 has a vertically long main body case 9. On the front surface of the main body case 9, an “ON” button 10A for turning on the power, An “OFF” button 10B for OFF and operation buttons 10C to 10J used for normal operations such as raising and lowering the vehicle maintenance lift 2 are provided. On the other hand, as shown in FIG. 2 (b), on the back surface of the main body case 9, there is a magnet recess (not shown) that opens at a substantially central portion in the width direction and a substantially central portion in the vertical direction of the main body case 9. A formed and annular magnet 11 is fitted in the receiving recess with its surface flush with the back surface. Thereby, the engagement recessed part 12 opened circularly in the back surface is formed in the center part of the annular magnet 11.

  Further, as shown in FIGS. 1 and 3, the main body case 9 includes a lift control transmitter 13, a collation reader 14, a collation confirmation light emitting diode (collation confirmation LED) 15, and a battery unit 16. The receiving coil 17 is accommodated. The lift control transmission unit 13 is used to transmit an operation command signal for the drive control unit 7 to the lift control reception unit 8 of the vehicle maintenance lift 2 by radio. The collation reader 14 includes a microcomputer and an antenna (not shown), and is used for wireless communication with a collation tag portion 25 of the holder 4 described later without contact. The verification reader 14 is connected with a verification confirmation LED 15. As shown in FIG. 2A, the verification confirmation LED 15 is exposed at the upper front portion of the main body case 9. Further, as shown in FIG. 3, the battery unit 16 is accommodated inside the main body case 9 on the lower side in the vertical direction of the main body case 9. The battery unit 16 accommodates three rechargeable batteries 19 connected in series. The power receiving coil 17 is accommodated inside the main body case 9 on the upper side in the vertical direction of the main body case 9. The power receiving coil 17 is electrically connected to a conductive fitting (not shown) provided in the battery unit 16 and conducting in series with the three rechargeable batteries 19 inside the main body case 9.

  As shown in FIG. 4, the holder 4 has a main body case 21 to which the remote control terminal 3 is detachably attached. The vertical dimension of the main body case 21 is shorter than the vertical dimension of the main body case 9 of the remote control terminal 3, and the width dimension of the main body case 21 is set to be substantially the same as the width dimension of the main body case 9. The front surface of the main body case 21 is provided with a columnar engagement convex portion 22 that protrudes forward from the front surface at a substantially central portion in the width direction of the main body case 21 and on a lower side in the vertical direction. This engagement convex part 22 is used in order to engage with the engagement concave part 12 (see FIG. 2B) of the remote control terminal 3. In this embodiment, the engagement convex part 22 was comprised with the magnetic material (here iron). Further, support members 23, 23 capable of supporting the remote control terminal 3 attached to the main body case 21 are attached to the left and right side surfaces of the main body case 21. Each support member 23 is formed of a metal plate and protrudes from the left and right side surfaces to the front side of the main body case 21. The support members 23 are arranged so as to face each other in the width direction of the main body case 21. Furthermore, the upper end side of each support member 23 is provided with a bent portion 23A that is bent along the upper surface of the main body case 21, and the bent portion 23A protrudes from the upper surface to the front side of the main body case 21.

  In addition, as shown in FIGS. 1 and 3, a matching tag portion 25 and a power transmission coil 26 are accommodated in the body case 21 of the holder 4. The matching tag unit 25 includes an IC chip and an antenna (not shown), and predetermined remote control terminal identification information (hereinafter referred to as “identification information”) is stored in advance in the IC chip. The matching tag unit 25 transmits the identification information at a predetermined interval by radio. When the identification reader 14 of the remote control terminal 3 receives the identification information from the identification tag unit 25, the identification reader 14 compares the identification information with the identification information stored in the microcomputer of the identification reader 14. When the identification information matches the verification information, the verification reader 14 authenticates the remote control terminal 3 as a remote control terminal that performs wireless communication with the lift control receiving unit 8. At that time, the verification check LED 15 is lit based on the lighting command signal transmitted from the verification reader 14. In addition, the verification reader 14 wirelessly transmits a remote control terminal authentication signal to the lift control receiver 8 of the vehicle maintenance lift 2. When the lift control receiving unit 8 receives the remote control terminal authentication signal, the lift control receiving unit 8 can receive an operation command signal for the drive control unit 7 from the remote control terminal 3 authenticated by the verification reader 14. Thereafter, when the “ON” button 10 </ b> A of the remote control terminal 3 is pressed and the operation buttons 10 </ b> C to 10 </ b> J are pressed, the lift control receiving unit 8 is wirelessly transmitted from the lift control transmitting unit 13. When the command signal is received, an operation command is transmitted to the drive control unit 7 in accordance with the operation command signal.

  As shown in FIG. 3, the power transmission coil 26 is accommodated inside the main body case 21 on the upper side in the vertical direction of the main body case 21 of the holder 4. Thereby, when the remote control terminal 3 is attached to the holder 4, the power transmission coil 26 can be arranged to face the power reception coil 17 of the remote control terminal 3. Furthermore, the power transmission coil 26 is electrically connected to a power cord 27 (see FIG. 4) introduced into the body case 21. AC power is supplied to the power transmission coil 26 by the power cord 27. The power cord 27 is wound around a cord reel suspended from the ceiling surface of the building where the vehicle maintenance lift 2 is disposed, and the power cord 27 is wound around the cord reel or fed out from the cord reel. be able to. Therefore, the holder 4 can be suspended up and down with respect to the ceiling surface. Therefore, when the holder 4 is raised and lowered, the position of the holder 4 can be adjusted to a position that is convenient for the operator in the raising and lowering direction. The power cord 27 and the cord reel are examples of the support mechanism of the present invention.

  Next, an operation of attaching / detaching the remote control terminal 3 to / from the holder 4 will be described. The operator causes the engagement convex portion 22 of the holder 4 to engage with the engagement concave portion 12 of the remote control terminal 3 as shown in FIG. At this time, the left and right side surfaces of the remote control terminal 3 are moved along the inner surfaces of the support members 23 and 23 (see FIG. 5), and the upper surface of the remote control terminal 3 is bent by the bent portions 23A and 23A (see FIG. 5). By moving along the inner surface, the engaging concave portion 12 can be easily guided to the engaging convex portion 22. In the present embodiment, since the engaging convex portion 22 is made of a magnetic material and the engaging concave portion 12 is formed in the annular magnet 11, the engaging convex portion 22 is attracted to the engaging concave portion 12 by the magnetic force of the magnet 11. . Thereby, since the engagement recessed part 12 and the engagement convex part 22 can be closely_contact | adhered (adsorbed), as shown in FIG.3 and FIG.5, the remote control terminal 3 can be closely_contact | adhered to the holder 4 and can be mounted | worn. Further, for example, even when the power cord 27 is wound around the cord reel, the remote control terminal 3 is brought into close contact with the holder 4 and the upper surface of the remote control terminal 3 is supported by both the support members 23 and 23. And by supporting the left and right side surfaces, the remote control terminal 3 can be prevented from jumping out of the holder 4.

  As shown in FIG. 3, when the remote control terminal 3 is attached to the holder 4, the power transmission coil 26 of the holder 4 and the power reception coil 17 of the remote control terminal 3 face each other. When AC power is supplied to the power transmission coil 26 by the power cord 27 (see FIG. 5), AC power is transmitted to the power receiving coil 17 in a non-contact manner by electromagnetic induction. Thereby, an AC voltage is induced in the power receiving coil 17. The AC voltage is converted into a DC voltage by a smoothing circuit (not shown), and the DC voltage is supplied to the battery unit 16 for charging each rechargeable battery 19. Therefore, it is possible to charge each rechargeable battery 19 simply by attaching the remote control terminal 3 to the holder 4. Further, after the operation of the vehicle maintenance lift 2 by the remote control terminal 3 is completed, the storage location of the remote control terminal 3 can be fixed by attaching the remote control terminal 3 to the holder 4. Thereby, loss of the remote control terminal 3 can be prevented. The battery unit 16 and each rechargeable battery 19 are examples of the rechargeable battery of the present invention. The power receiving coil 17 and the power transmitting coil 26 are examples of the charging unit of the present invention.

  On the other hand, the remote control terminal 3 can be easily detached from the holder 4 simply by pulling the remote control terminal 3 from the holder 4 so as to oppose the magnetic force of the magnet 11.

<Effect of Embodiment 1>
In the remote control system 1 of the present embodiment, each rechargeable battery 19 of the remote control terminal 3 can be charged using the power receiving coil 17 and the power transmission coil 26 with the remote control terminal 3 mounted on the holder 4. Therefore, unlike the prior art, there is no need to move to a position away from the holder 4 in order to charge each rechargeable battery 19, so that the troublesome work of charging each rechargeable battery 19 can be eliminated. Further, after the operation of the vehicle maintenance lift 2 by the remote control terminal 3 is completed, the storage location of the remote control terminal 3 can be fixed by mounting the remote control terminal 3 in the holder 4 in order to charge the rechargeable battery 19. Thereby, loss of the remote control terminal 3 can be prevented.
Further, the lift control receiving unit 8 connected to the drive control unit 7 of the vehicle maintenance lift 2 can receive the operation command signal for the drive control unit 7 transmitted by the authenticated remote controller terminal 3 by radio. Thus, it is possible to prevent the vehicle maintenance lift 2 from malfunctioning due to an operation command signal from other than the authenticated remote control terminal 3.

  Furthermore, the engaging convex portion 22 of the holder 4 and the engaging concave portion 12 of the remote control terminal 3 are engaged, and the engaging convex portion 22 is attracted to the engaging concave portion 12 by the magnetic force of the magnet 11, thereby The convex part 22 and the engagement recessed part 12 can be stuck. Along with this, the remote control terminal 3 can be mounted in close contact with the holder 4, so that the remote control terminal 3 can be prevented from falling off the holder 4.

  In addition, a power receiving coil 17 electrically connected to the three rechargeable batteries 19 is accommodated in the remote control terminal 3, and a power transmitting coil 26 that transmits power to the power receiving coil 17 in a contactless manner is provided in the holder 4. By accommodating, the charging part is not exposed from the remote control terminal 3 or the holder 4. Thereby, charging to each rechargeable battery 19 can be performed safely.

  In addition, when the holder 4 is moved up and down by winding the power cord 27 around the cord reel or feeding it from the cord reel, the position of the holder 4 can be adjusted to a position that is convenient for the operator in the lifting direction. become.

<Embodiment 2>
A second embodiment of the present invention will be described with reference to FIGS. Here, the same configurations as those of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. FIG. 6 shows a block diagram of a remote control system 1A for remotely operating the vehicle maintenance lift 2A with the remote control terminal 3A. The remote control system 1A includes a vehicle maintenance lift 2A, a remote control terminal 3A, and a holder 4A.

  The drive control unit 7A of the vehicle maintenance lift 2A shown in FIG. 6 includes a control power supply circuit 31 that generates electric power to be supplied to the drive control unit 7A from a commercial AC power supply. Here, it is assumed that the control power supply circuit 31 generates a DC voltage of 24 V from a commercial AC power supply. Further, the vehicle maintenance lift 2 </ b> A includes a first lift control reception unit 8 </ b> A, a second power line communication unit 32, and a second lift control reception unit 33. The first lift control receiver 8A is connected to the drive controller 7A. As will be described later, the first lift control receiving unit 8A receives the operation command signal transmitted wirelessly from the lift control transmitting unit 13 of the remote control terminal 3A, and drives the operation command corresponding to the operation command signal. Used to transmit to the control unit 7A. In addition, the second power line communication unit 32 is connected to a power cord 27 (power line) that electrically connects the control power circuit 31 and the power transmission terminal 51 of the holder 4A. It is used to perform wired communication with the 4A first power line communication unit 53 using a power line as a transmission medium. A communication signal (power line carrier signal) obtained by phase-modulating the operation command signal is transmitted from the remote control terminal 3A to the second power line communication unit 32 via the holder 4A through the wired communication. The second power line communication unit 32 demodulates the received power line carrier signal into an operation command signal. The drive control unit 7A is connected to a second lift control receiving unit 33, and the second power line communication unit 32 is connected to the second lift control receiving unit 33. As will be described later, the second lift control receiving unit 33 receives an operation command signal transmitted from the second power line communication unit 32 by wire, and sends an operation command corresponding to the received operation command signal to the drive control unit 7A. Used to send to.

  The remote control terminal 3A shown in FIG. 7 has an opening on the upper surface of a hollow, vertically long rectangular parallelepiped main body 35, covers the opening, and is smaller in height, width, and depth than the main body 35. A main body case 9A having a rectangular parallelepiped shape and provided with a protruding portion 36 continuously provided on the upper surface is provided. Furthermore, an opening 37 is provided on the upper surface of the protruding portion 36 to allow the inside and the outside of the protruding portion 36 to communicate with each other. As with the remote control terminal 3 of the first embodiment, various buttons 10A to 10J are provided on the front surface of the main body 35 (the diagonally right front side in FIG. 7).

  As shown in FIGS. 6 and 8, the main body case 9 </ b> A includes a lift control transmitter 13, a collation reader 14, a collation confirmation LED 15, a battery unit 16, and a power receiving terminal 40. The signal output control unit 41 and the signal transmission pin 42 are accommodated. The power receiving terminal 40 is disposed inside the protruding portion 36 so as to face the opening 37 (see FIGS. 7 and 8). A signal output control unit 41 is connected to the power receiving terminal 40. When the power transmission terminal 51 of the holder 4A is brought into contact with the power reception terminal 40, the signal output control unit 41 divides the DC voltage supplied from the power cord 27 to the power reception terminal 40 through the power transmission terminal 51 by a voltage dividing circuit (not shown). Receives voltage. The signal output control unit 41 detects that the power transmission terminal 51 is in contact with the power reception terminal 40 by receiving the divided voltage. In addition, a signal transmission pin 42 and a lift control transmission unit 13 are connected to the signal output control unit 41. Similarly to the power receiving terminal 40, the signal transmission pin 42 is also disposed inside the protruding portion 36 so as to face the opening 37. When the signal output control unit 41 detects that the power transmission terminal 51 is in contact with the power receiving terminal 40, the signal output control unit 41 can transmit the operation command signal to the signal transmission pin 42 without transmitting it to the lift control transmission unit 13. On the other hand, when the signal output control unit 41 does not receive the divided voltage and cannot detect the contact of the power transmission terminal 51 with the power reception terminal 40, the signal output control unit 41 does not transmit the operation command signal to the signal transmission pin 42 and performs lift control. To the transmission unit 13. In addition, the power receiving terminal 40 is electrically connected to a conductive fitting (not shown) provided in the battery unit 16 and conducting in series with the three rechargeable batteries 19 inside the main body case 9A. Yes.

  As shown in FIG. 9, the holder 4A has a hollow box shape that protrudes from the front surface of the main body case 21A to the front side and has an insertion port 46 on the lower surface, on the upper side in the longitudinal direction of the main body case 21A. An accommodating portion 45 capable of accommodating 36 (see FIG. 7) is provided. An engaging protrusion (not shown) that engages with an engaging claw 38 (see FIG. 7) formed on the outer surface of the protruding portion 36 is disposed inside the housing portion 45. In the present embodiment, when the rear surface of the remote control terminal 3A is moved upward along the front surface of the main body case 21A, the engaging claws 38 inserted into the housing portion 45 through the insertion port 46 engage with the engaging protrusions. As a result, the remote control terminal 3A is attached to the holder 4A as shown in FIGS. On the other hand, the engaging / unlocking member 47 projecting from the right side surface of the housing portion 45 when viewed from the front (the diagonally left rear side in FIG. 9) is moved to a position where the engagement between the engaging claw 38 and the engaging protrusion is unlocked. By doing so, the remote control terminal 3A can be detached from the holder 4A.

  In addition, as shown in FIGS. 6 and 8, the holder 4 </ b> A has a step-down regulator 50, a power transmission terminal 51, a signal reception pin 52, a first power line communication unit 53, in addition to the verification tag unit 25. Is housed. As shown in FIG. 8, the verification tag portion 25 is accommodated in the main body case 21A of the holder 4A. Also in the present embodiment, as in the first embodiment, the verification information transmitted by the verification tag unit 25 wirelessly is compared with the verification information stored in the microcomputer of the verification reader 14 of the remote control terminal 3A. When the identification information matches the verification information, the verification reader 14 authenticates the remote control terminal 3A as a remote control terminal that performs wireless communication with the first lift control reception unit 8A (see FIG. 6). In addition, the verification reader 14 transmits a remote control terminal authentication signal to the first lift control receiver 8A by radio. When the first lift control receiving unit 8A receives the remote control terminal authentication signal, the operation command signal for the drive control unit 7A from the remote control terminal 3A authenticated by the verification reader 14 can be received. Furthermore, the verification reader 14 also transmits a remote control terminal authentication signal to the signal output control unit 41 by radio. When the signal output control unit 41 receives the remote control terminal authentication signal, the signal output control unit 41 transmits an operation command signal to the signal transmission pin 42 or the lift control transmission unit 13.

  As shown in FIG. 8, the step-down regulator 50 is housed inside the main body case 21A. As shown in FIG. 6, the step-down regulator 50 is electrically connected to the control power supply circuit 31 and then electrically connected to the power cord 27 introduced into the main body case 21A. DC voltage is input. The step-down regulator 50 steps down the DC voltage of 24V to a power supply voltage (here, a DC voltage of 5V) necessary for supply to the circuit disposed in the holder 4. As shown in FIG. 8, the power transmission terminal 51 is arranged inside the housing portion 45 so as to face the insertion slot 46 (see FIG. 9). As shown in FIG. 6, the power transmission terminal 51 is connected to the step-down regulator 50. As a result, the power transmission terminal 51 is wired to the control power circuit 31 by the power cord 27 via the step-down regulator 50. As a result, the power transmission terminal 51 receives DC power from the control power supply circuit 31. As shown in FIGS. 8 and 10, when the remote control terminal 3 </ b> A is attached to the holder 4 </ b> A, the power transmission terminal 51 is in contact with and electrically connected to the power reception terminal 40. For this reason, the power receiving terminal 40 receives DC power from the power transmitting terminal 51. Thereafter, this DC power is supplied to the battery unit 16 in order to charge each rechargeable battery 19. Note that the holder 4A can also be suspended up and down with respect to the ceiling surface of the building, similarly to the holder 4 of the first embodiment.

  Further, the signal receiving pin 52 shown in FIG. 6 is disposed inside the accommodating portion 45 so as to face the insertion slot 46 (see FIG. 9). The signal reception pin 52 is connected to the first power line communication unit 53. As shown in FIGS. 8 and 10, when the remote control terminal 3 </ b> A is attached to the holder 4 </ b> A, the signal transmission pin 42 is connected to the signal reception pin 52. Then, the operation command signal transmitted from the signal output control unit 41 to the signal transmission pin 42 is transmitted to the first power line communication unit 53 through the signal reception pin 52. The first power line communication unit 53 is connected to a power cord 27 (power line) introduced into the main body case 21A, and phase-modulates the operation command signal received through the signal receiving pin 52 to form a power line carrier signal. It is used to convert and superimpose the power line carrier signal on the power line.

  Next, an operation in which the remote control system 1A according to the present embodiment transmits an operation command signal to the vehicle maintenance lift 2A by wire communication or wireless communication will be described. In the present embodiment, when the remote control terminal 3A is attached to the holder 4A as shown in FIGS. 8 and 10, the operation command signal is sent to the second lift control receiving unit of the vehicle maintenance lift 2A as described below. 33 is wired. The second lift control receiving unit 33 is an example of the receiving unit of the present invention.

  When the remote control terminal 3A is attached to the holder 4A, when the power transmission terminal 51 of the holder 4A contacts the power reception terminal 40 of the remote control terminal 3A, the power reception terminal 40 receives DC power from the power transmission terminal 51. Along with this, the signal output control unit 41 receives a voltage obtained by dividing the DC voltage supplied to the power receiving terminal 40. Thereafter, when the signal output control unit 41 receives a remote control terminal authentication signal from the verification reader 14, the “on” button 10A of the remote control terminal 3A authenticated by the verification reader 14 is pressed to operate the operation button 10C. When -10J or the like is pressed, an operation command signal is transmitted to the signal transmission pin 42. When the remote control terminal 3 </ b> A is attached to the holder 4 </ b> A, the signal transmission pin 42 is connected to the signal reception pin 52, so that the operation command signal is transmitted to the first power line communication unit 53 through the signal reception pin 52. The signal output control unit 41 of the present embodiment does not transmit the operation command signal to the lift control communication unit 13 when transmitting the operation command signal to the signal transmission pin 42. Thereby, the wired communication of the operation command signal for the vehicle maintenance lift 2A is prioritized over the wireless communication of the operation command signal. The signal output control unit 41 is an example of a wired communication priority unit according to the present invention.

  Subsequently, the first power line communication unit 53 phase-modulates the operation command signal received through the signal receiving pin 52 to convert it into a power line carrier signal, and superimposes the power line carrier signal on the power line (power cord 27). The power line carrier signal is wired to the second power line communication unit 32 of the vehicle maintenance lift 2A using the power line as a transmission medium. Thereafter, the second power line communication unit 32 takes in the power line carrier signal, demodulates it into the operation command signal, and performs wired communication with the operation command signal to the second lift control reception unit 33. Following this, the second lift control receiving unit 33 transmits an operation command to the drive control unit 7A in accordance with the received operation command signal. In addition, the 1st power line communication part 53 is an example of the superimposition part of this invention, and the 2nd power line communication part 32 is an example of the demodulation part of this invention. The second lift control receiving unit 33 is an example of the receiving unit of the present invention.

  On the other hand, when the remote control terminal 3A is detached from the holder 4A, an operation command signal is wirelessly communicated to the first lift control receiving unit 8A of the vehicle maintenance lift 2A as described below. The first lift control receiver 8A is an example of a receiver according to the present invention.

  When the remote control terminal 3A is removed from the holder 4A, the power receiving terminal 40 does not contact the power receiving terminal 40, and therefore the power receiving terminal 40 cannot receive DC power from the power transmitting terminal 51. As a result, the signal output control unit 41 transmits an operation command signal to the lift control transmission unit 13 assuming that the voltage obtained by dividing the DC voltage cannot be received. Thereafter, in the same manner as in the first embodiment, when the first lift control receiving unit 8A of the vehicle maintenance lift 2A receives the operation command signal transmitted wirelessly from the lift control transmitting unit 13, the drive control unit An operation command is transmitted to 7A according to the operation command signal. As described above, in the remote control system 1A of the present embodiment, it is possible to transmit the operation command signal to the vehicle maintenance lift 2A by wired communication in addition to the wireless communication as in the first embodiment. In addition, since the wired communication to the vehicle maintenance lift 2A is made possible using the power line (power cord 27) as a transmission medium, a new communication is made between the vehicle maintenance lift 2A and the holder 4A in order to perform this wired communication. There is no need to provide wires.

<Effect of Embodiment 2>
In the remote control system 1A of the present embodiment, it is possible to wire-communicate an operation command signal from the authenticated remote control terminal 3A to the second lift control receiving unit 33 of the vehicle maintenance lift 2A.
Furthermore, since the operation command signal can be transmitted to the second lift control receiving unit 33 by wired communication having higher communication reliability than wireless communication, the vehicle maintenance lift 2A is reliably operated by the operation command signal. It becomes possible.

<Embodiment 3>
A third embodiment of the present invention will be described with reference to FIG. Here, the same configurations as those of the first and second embodiments are denoted by the same reference numerals, and the description thereof is omitted. FIG. 11 shows a block diagram of a remote control system 1B for remotely operating the vehicle maintenance lift 2B with the remote control terminal 3A. The remote control system 1B includes a vehicle maintenance lift 2B in addition to the remote control terminal 3A and the holder 4A similar to those of the second embodiment.

  As shown in FIG. 11, the vehicle maintenance lift 2 </ b> B includes a mechanical two-point changeover switch 60. The two-point changeover switch 60 is operated by an operator directly to switch the drive control unit 7A so as to connect to one of the first lift control communication unit 8A and the second lift control reception unit 33. Used for. The two-point changeover switch 60 is connected to the base point 61 connected to the drive control unit 7A, the first connection contact 62 connected to the first lift control receiving unit 8A, and the second lift control receiving unit 33. And a second connection contact 63.

  Next, the operation of the remote control system 1B of this embodiment will be described. When the operator operates the two-point changeover switch 60 to switch the base point 61 and the first connection contact 62 to connect, the first lift control receiving unit 8A performs drive control in the same manner as in the second embodiment. An operation command is transmitted to the unit 7A. At that time, the first lift control receiving unit 8A receives the operation command signal transmitted from the lift control transmitting unit 13 by radio. On the other hand, when the operator operates the two-point selector switch 60 to switch the base point 61 and the second connection contact 63 to connect, the second lift control receiving unit 33 is operated in the same manner as in the second embodiment. Then, an operation command is transmitted to the drive control unit 7A. At that time, the power line carrier signal obtained by phase-modulating the operation command signal is wired to the second power line communication unit 32 using the power line as a transmission medium.

  In this embodiment, for example, when switching is made so that the base point 61 and the first connection contact 62 are connected, there is a problem in the wireless communication between the first lift control receiving unit 8A and the lift control transmitting unit 13. Even if the operation command can no longer be transmitted to the drive control unit 7A due to the occurrence, if the remote control terminal 3A is mounted on the holder 4A, the power line carrier signal obtained by phase-modulating the operation command signal is transmitted using the power line as the transmission medium. 2 Wired communication is performed with the power line communication unit 32. And if an operator switches so that the base 61 may be connected with the 2nd connection contact 63, the 2nd lift control receiving part 33 can transmit an operation command to 7 A of drive control parts.

  Further, when switching is made so that the base point 61 and the second connection contact 63 are connected, a problem occurs in the wired communication between the second power line communication unit 32 and the first power line communication unit 53. Even when the operation command cannot be transmitted to the control unit 7A, if the remote control terminal 3A is removed from the holder 4A, the first lift control receiving unit 8A receives the operation command signal transmitted from the lift control transmitting unit 13 by radio. Receive. If the worker switches so that the base point 61 is connected to the first connection contact 62, the first lift control receiving unit 8A can transmit an operation command to the drive control unit 7A. As described above, when the operator operates the two-point changeover switch 60, the operation command signal is wirelessly communicated to the first lift control receiving unit 8A, and the wire communication is performed to the second lift control receiving unit 33. One of the can be selected. The two-point changeover switch 60 is an example of the selection unit of the present invention.

<Effect of Embodiment 3>
In the remote control system 1B of the present embodiment, it becomes possible to wire-communicate an operation command signal from the authenticated remote control terminal 3A to the second lift control receiving unit 33 of the vehicle maintenance lift 2B.
Furthermore, even if a malfunction occurs in one of the wired communication and the wireless communication for the first lift control receiving unit 8A, the other communication method (wireless communication or wired communication) is changed by the two-point changeover switch 60. You can choose. Therefore, the transmission reliability of the operation command signal to the first lift control receiving unit 8A and the second lift control receiving unit 33 is improved.

  The present invention is not limited to the above-described embodiment, and can be implemented by appropriately changing a part of the configuration without departing from the spirit of the invention. In the first embodiment described above, an example in which the engagement concave portion 12 is formed on the back surface of the remote control terminal 3 and the engagement convex portion 22 is provided on the case main body 21 of the holder 4 is shown. An engagement convex portion may be provided, and an engagement concave portion that engages with the engagement convex portion may be provided in the case main body 21. Further, unlike the first embodiment described above, the engagement convex portion 22 may be formed by a magnet, and an annular magnetic material having the engagement concave portion 12 may be provided instead of the annular magnet 11.

  Further, unlike the above-described first to third embodiments, the remote control terminal 3B includes the identification information storage unit 70 as in the remote control system 1C shown in FIG. 12 without providing the verification reader 14 and the verification tag unit 25. In addition, the vehicle maintenance lift 2 </ b> C may include a signal input / output control unit 71 and an identification information determination unit 72. In this case, as described below, the remote control terminal 3B is authenticated as a remote control terminal that performs wired communication with the second lift control reception unit 33, or the remote control terminal 3B is connected to the first lift control transmission / reception unit 8B. You may authenticate as a remote control terminal which performs wireless communication. First, when authenticating the remote control terminal 3B as a terminal that performs the wired communication, the signal output control unit 41A separates the DC voltage supplied to the power receiving terminal 40 by attaching the remote control terminal 3A to the holder 4B. When receiving the pressed voltage, the identification information of the remote control terminal 3A stored in the identification information storage unit 70 is read out. Further, the signal output control unit 41A converts the signal corresponding to the identification information into a power line carrier signal, and then uses the power line carrier signal as a transmission medium through the power receiving terminal 40 and the power transmission terminal 51 as a vehicle maintenance lift 2C. Is transmitted to the second power line communication unit 32A by wire communication. Then, after the second power line communication unit 32A demodulates the power line carrier signal into a signal corresponding to the identification information, the signal input / output control unit 71 transmits this signal to the identification information determination unit 72. The identification information determination unit 72 determines whether the identification information corresponding to this signal matches the collation information of the remote control terminal 3A stored in the identification information determination unit 72. When the identification information determination unit 72 determines that the identification information matches the verification information, and the signal input / output control unit 71 receives a remote control terminal authentication signal from the identification information determination unit 72, the remote control terminal 3B is connected to the wired communication. Authenticate as a terminal that performs When this authentication is performed, the signal input / output control unit 71 transmits the remote control terminal authentication signal to the second power line communication unit 32A. The second power line communication unit 32A phase-modulates the remote control terminal authentication signal and converts it into a power line carrier signal, and then wire this power line carrier signal to the first power line communication unit 53A of the holder 4B using the power line as a transmission medium. Send by communication. The first power line communication unit 53A demodulates the power line carrier signal into the remote control terminal authentication signal, and then transmits the remote control terminal authentication signal to the signal output control unit 41A through the signal reception pin 52 and the signal transmission pin 42. And as a result of 41 A of signal output control parts transmitting a lighting command signal to LED15 for collation confirmation, LED15 for collation confirmation will light. After that, when the second lift control receiving unit 33 receives the operation command signal transmitted to the second lift control receiving unit 33 by wire communication in the same manner as in the second embodiment, the second lift control receiving unit 33 receives the operation command signal. In response, an operation command is transmitted to the drive control unit 7A.

  On the other hand, when authenticating the remote control terminal 3B as a remote control terminal that performs wireless communication with the first lift control transmission / reception unit 8B, the signal output control unit 41A is configured to remove the remote control terminal 3B from the holder 4B so that the signal output control unit 41A Can not receive the voltage divided by. Then, the signal output control unit 41A reads the identification information of the remote control terminal 3A stored in the identification information storage unit 70, and transmits a signal corresponding to the identification information to the lift control transmission / reception unit 13A. The lift control transmission / reception unit 13A wirelessly transmits a signal corresponding to the identification information to the first lift control transmission / reception unit 8B of the vehicle maintenance lift 2C. Next, the first lift control transmission / reception unit 8B transmits a signal corresponding to the identification information to the signal input / output control unit 71, and the identification information determination unit 72 transmits the signal transmitted from the signal input / output control unit 71. It is determined whether or not the identification information corresponding to 一致 matches the verification information of the remote control terminal 3 </ b> A stored in the identification information determination unit 72. When the identification information determination unit 72 determines that the identification information matches the verification information, and the signal input / output control unit 71 receives a remote control terminal authentication signal from the identification information determination unit 72, the remote control terminal 3B is made to communicate with the wireless communication terminal 3B. Authenticate as a terminal that performs When this authentication is performed, the signal input / output control unit 71 transmits the remote control terminal authentication signal to the first lift control transmitting / receiving unit 8B. The first lift control transceiver 8B wirelessly transmits the remote control terminal authentication signal to the lift control transceiver 13A. Then, the lift control transmitting / receiving unit 13A transmits a remote control terminal authentication signal to the signal output control unit 41A. Subsequently, as a result of the signal output control unit 41A transmitting the lighting command signal to the verification confirmation LED 15, the verification confirmation LED 15 is lit. After that, when the first lift control transmission / reception unit 8B receives the operation command signal wirelessly transmitted from the lift control transmission / reception unit 13A in the same manner as in the first and second embodiments, the operation command is sent to the drive control unit 7A. An operation command is transmitted in response to the signal.

  Further, unlike the above-described second and third embodiments, the control power supply circuit 31 and the power transmission terminal 51 are electrically connected without providing the step-down regulator 50 in the holder 4A and without providing the signal transmission pin 42 and the signal reception pin 52. The first power line communication unit 53 may be accommodated inside the remote control terminal 3A and connected between the signal output control unit 41 and the power receiving terminal 40. In this way, the first power communication unit 53 phase-modulates the operation command signal received from the signal output control unit 41 and converts it into a power line carrier signal. The first power communication unit 53 converts the power line carrier signal into the power line through the power receiving terminal 40. Can be superimposed.

  In addition, in the above-described Embodiments 2 and 3 and the embodiment shown in FIG. 12, the first power line communication units 53 and 53A have shown an example in which the operation command signal is phase-modulated. The 1 power line communication units 53 and 53A may frequency-modulate the operation command signal to convert it into a power line carrier signal, and superimpose the power line carrier signal on the power line. Further, unlike the second and third embodiments, the second power line communication unit 32 demodulates the power line carrier signal into an operation command signal, and in addition powers the demodulated operation command signal by phase modulation or frequency modulation. After converting into the carrier signal, the power line carrier signal may be transmitted to the first power line communication unit 53 by wire communication using the power line as a transmission medium. In addition, the first power line communication unit 53 converts the operation command signal into a power carrier signal by performing phase modulation or frequency modulation, and then uses the power line carrier signal as a transmission medium for the second power line communication unit 32. In addition to transmitting by wire communication, the power line carrier signal transmitted from the second power line communication unit 32 by wire communication may be demodulated into an operation command signal. Thereby, for example, after the second power line communication unit 32 receives the power line carrier signal from the first power line communication unit 53 and demodulates it to the operation command signal, the second power line communication unit 32 converts the operation command signal into a power line carrier signal, and The carrier signal is sent back to the first power line communication unit 53, and the first power line communication unit 53 confirms the sent power line carrier signal so that the power line carrier is transferred from the first power line communication unit 53 to the second power line communication unit 32. It can be monitored that the signal has been transmitted reliably.

  In the third embodiment described above, an example in which the two-point changeover switch 60 is a mechanical switch has been shown. However, the present invention is not limited to this. For example, the two-point changeover switch 60 is an electronic switch using a semiconductor element. Also good. Further, in the second and third embodiments, the example in which the remote control terminal 3A is attached to the holder 4A by the engagement of the engagement claw 38 of the remote control terminal 3A and the engagement protrusion of the holder 4A has been shown. As in the case of the first embodiment, by engaging the engagement convex portion provided on the front surface of the case 21A of the holder 4A with the engagement concave portion formed on the back surface of the main body case 9A of the remote control terminal 3A, The remote control terminal 3A is mounted on the holder 4A, and the engagement convex portion provided on the back surface of the main body case 9A is engaged with the engagement concave portion formed on the front surface of the case 21A. 3A may be mounted on the holder 4A.

  1, 1A, 1B ··· Remote control system, 2, 2A, 2B ·· Lift for vehicle maintenance, 3, 3A · · Remote control terminal, 4, 4A · · Holder, 7, 7A · · Drive control unit, 8 · · Lift Control receiver, 8A... First lift control receiver, 11 .. Magnet, 12 .. Engagement recess, 14 .. Verification reader, 16 .. Battery unit, 17 .. Power receiving coil, 19. Rechargeable battery, 22 .... engagement projection, 25 ... tag tag for verification, 26 ... power transmission coil, 27 ... power cord, 31 ... control power circuit for drive controller, 32 ... second power line communication , 33... Second lift control receiving unit, 40... Power receiving terminal, 41... Signal output control unit, 51... Power transmission terminal, 53 .. first power line communication unit, 60.

Claims (6)

Based on the identification information of the remote control terminal, authenticates the remote control terminal that performs wireless communication with the reception unit connected to the drive control unit of the lift device, and the reception unit transmits the authenticated remote control terminal wirelessly In the remote control system of the lift device that can receive the operation command signal for the drive control unit,
A holder to which the remote control terminal is detachably mounted;
A charging unit that is built in the holder and the remote control terminal and charges a rechargeable battery built in the remote control terminal when the remote control terminal is mounted on the holder;
The holder is provided with a tag that stores the identification information, and the remote control terminal is provided with a reader that can read the identification information in a non-contact manner and stores collation information that is collated with the read identification information. Being
When the identification information read by the reader matches the verification information, the reader authenticates a remote control terminal that performs wireless communication with the receiving unit. The charging unit is built in the remote control terminal and connected to the rechargeable battery, and is built in the holder, and is wired to a control power source of the drive control unit of the lift device by a power line, A power transmission terminal that contacts the power receiving terminal and supplies power from the control power source to the power receiving terminal; and
One of the remote control terminal authenticated by the reader and the holder receives the operation command signal on the power line carrier communication on the condition that the power transmission terminal is in contact with the power receiving terminal of the authenticated remote control terminal. Is provided with a superimposition unit that modulates the communication signal onto the power line,
The lift device is provided with a demodulator that takes in the communication signal superimposed on the power line and demodulates it into the operation command signal, and performs wired communication with the operation command signal to the receiving unit.
The lift device according to claim 1, wherein the authenticated remote control terminal is provided with a wired communication priority unit that prioritizes the wired communication with respect to the receiving unit over the wireless communication with respect to the receiving unit. Remote control system. The charging unit is built in the remote control terminal and connected to the rechargeable battery, and is built in the holder, and is wired to a control power source of the drive control unit of the lift device by a power line, A power transmission terminal that contacts the power receiving terminal and supplies power from the control power source to the power receiving terminal; and
One of the remote control terminal authenticated by the reader and the holder receives the operation command signal on the power line carrier communication on the condition that the power transmission terminal is in contact with the power receiving terminal of the authenticated remote control terminal. Is provided with a superimposition unit that modulates the communication signal onto the power line,
In the lift device,
A demodulation unit that takes in the communication signal superimposed on the power line and demodulates the operation command signal, and performs wired communication with the operation command signal to the reception unit;
The lift device remote control system according to claim 1, further comprising: a selection unit that selects one of the wireless communication and the wired communication with respect to the reception unit. One of the remote control terminal and the holder is formed with an engaging convex portion that protrudes to the other, and the other is formed with an engaging concave portion that engages with the engaging convex portion,
2. One of the engaging convex portion and the engaging concave portion is made of a magnetic material, and the other one of the engaging convex portion and the engaging concave portion has a magnet that can be attracted to the one. A remote control system for the described lifting device.   A power receiving coil that is built in the remote control terminal and connected to the rechargeable battery; and a power transmission coil that is built in the holder and transmits power to the power receiving coil in a non-contact manner using electromagnetic induction. 5. The remote control system for a lift device according to claim 1, wherein the remote control system is configured.   The remote control system for a lift device according to any one of claims 1 to 5, further comprising a support mechanism for supporting the holder so that the holder can be raised and lowered.

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