JPH079806A - Interlocking lock mechanism operated both electrically and manually of caster on bed, etc., and its operation control method - Google Patents

Abstract

PURPOSE:To provide an electric lock mechanism with a manual operation mechanism by which manual operation can be effected at power supply stoppage or the like. CONSTITUTION:This lock mechanism is composed of an electric driving mechanism 6 for transmitting the power to the rotary shaft 5 of a caster 3 and a stepping type of drive operation mechanism 7. An electric drive mechanism 6 has a motor 13 being placed on the mounting member 12 provide on a base frame and a motor arm 15 being mounted on the drive shaft 14 of the motor 13, and the tip of the motor arm 15 is inserted slidably in the slot 16 of a link 9. Furthermore, at the motor 13 are first and second limit switches 17 and 18 arranged so that they may oppose to each other in diametrical direction passing the shaft 14. Hereby, the lock and unlock of the caster can be made electrically, and manual operation is possible even at power stoppage, so even in case of emergency, it can satisfactorily cope with that.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric / manual interlocking lock mechanism for casters in a bed or the like, which has improved operability, and an operation control method thereof.

[0002]

2. Description of the Related Art For example, many casters for movement, which are attached to the legs of a bed or the like, have a lock mechanism. The lock mechanism includes, for example, a braking piece that abuts on the wheel to lock the wheel, an operating rod that presses the braking piece against the wheel, and a cam member that presses the operating rod. There is a structure in which a stepping operation means is attached to a rotation shaft of a cam member. Also,
Recently, products with new specifications of locking mechanism have been commercialized. Further, a structure in which the rotating shaft of the cam member is operated by an electric mechanism to lock the caster is also commercialized. Since such an electric type does not require a stepping operation, labor saving performance is dramatically improved, and there is a shortage of nurses and caregivers, which is a great effect.

[0003]

However, in the electric type as described above, the rotating shaft of the cam member and the electric mechanism are
Since it is always in a power-connected state, it becomes difficult to operate the lock mechanism of the caster when there is no electric equipment or when there is a power failure. The present invention has been made in view of the above-mentioned problems, and the electric lock mechanism is provided with a manual operation mechanism that enables manual operation during a power failure or the like.
It is an object of the present invention to provide an electric / manual interlocking lock mechanism for casters in a bed or the like, which is further improved in handleability, and an operation control method thereof.

[0004]

In order to solve the above problems, the present invention relates to a caster such as a bed provided with a lock mechanism, wherein the lock mechanism is a rotary shaft for transmitting power for performing a locking operation. The electric drive mechanism is connected to the rotary shaft through a mechanism for intermittently transmitting power, while the manual operation mechanism is connected to the rotary shaft, and the casters are locked to the electric drive mechanism. In addition to providing remote control means for setting the caster lock state, the remote control means is provided with detection means for detecting the operating state of the lock mechanism of the caster, and the remote control means sets the lock state of the caster based on the detection signal of the detection means. A display means for displaying is provided, and the manual operation mechanism can be operated when the electric drive mechanism is stopped. In the above-mentioned configuration, the mechanism for intermittently transmitting power has a first operating arm projectingly provided on the rotating shaft and an interlocking rod connected to the first operating arm. A motor and a motor arm attached to a drive shaft of the motor. The interlocking rod is provided with an elongated hole along the axial direction, and the distal end portion of the motor arm is movably fitted into the elongated hole. It can be configured. Further, in the manual operation mechanism, the second actuating arm is provided so as to project on the rotary shaft on which the first actuating arm is provided so as to be opposite to the caster on the side where the first actuating arm and the second actuating arm are provided. Of the triangular link is attached to the rotation axis of the caster, and a stepping step is rotatably attached to the column of the caster on the opposite side, and the tip of the stepping step is the triangular shape via the interlocking axis. It is characterized in that it is connected to the vicinity of the other apex of the link, and further, an interlocking rod communicating with the second operating arm is connected to the vicinity of the remaining apex of the triangular link. Further, the detection means includes a first limit switch and a second limit switch arranged at positions facing each other with the drive shaft of the motor interposed therebetween, and the detection member protruding from the motor arm is driven by the motor. The first limit switch detects the locked state of the casters, and the second limit switch detects the free state of the casters. In the electric / manual interlocking lock mechanism of the caster as described above, the electric drive mechanism is started, the lock state of the caster is detected by observing the on / off of the first limit switch, and if the first limit switch is on, the display is made. By turning on the means, it is determined whether or not the electric drive mechanism is in the on state. If the electric drive mechanism is in the on state, the motor is rotated, and the detection member of the motor arm abuts the second limit switch. Is stopped, and if the first limit switch is turned on and off, if it is off, it is ended, and if it is on, the procedure for displaying by the display means is executed. Further, the electric drive mechanism according to the present invention attaches the intermediate portion of the motor arm to the drive shaft of the motor, and detects the lock state of the caster at both ends of the motor arm and the free state of the caster. A detection member is provided, and one motor drive control detection unit is provided so that these detection members come into contact with each other. Further, in the electric drive mechanism according to the present invention, a detecting means for detecting the locked state of the caster is provided, the operating rod is connected to the first operating arm, and a long hole is formed at the tip of the operating rod and is supported by the long hole. The present invention is characterized in that the member is fitted in and movably supported, while a detection member that comes into contact with the detection means is provided. In such a caster electric / manual interlocking lock mechanism, the electric drive mechanism is activated to detect the lock state of the caster. If the caster is in the lock state, the display means is turned on and the electric drive mechanism is turned on. If the electric drive mechanism is in the on state, the motor is started and the timer is started, and if the caster is locked, the display means is turned on and the motor is started. If the time is normal, compare the time with the normal time, and if it is normal, judge the caster locked state to stop the motor, and if it is not normal, blink the display means to stop the motor and end it. On the other hand, when performing manual operation after stopping the motor,
If the caster is in the locked state, and if the caster is in the locked state, it is possible to execute a procedure for displaying the display means by turning it on.

[0005]

When the electric drive mechanism is activated to lock the caster, the motor arm rotates in conjunction with the rotation of the drive shaft of the motor. When the tip of the motor arm is moving along the elongated hole in the interlocking rod, the interlocking rod is in a free state, so that power is not transmitted to the first operating arm and the rotation of the caster is prevented. Since the shaft does not rotate, the locking mechanism is still inactive. When the tip of the motor arm reaches the end of the long hole, the motor arm is in a state of being mechanically connected, and the first operating arm rotates. As a result, the rotary shaft that communicates with the lock mechanism of the caster rotates, and the lock mechanism is locked. The locked state of the caster can be detected by the detection signal of this detection means when the detection member of the motor arm reaches the position where the detection means is arranged, and can be grasped by an appropriate display means. In such an electric drive mechanism, when the manual operation mechanism is operated when the motor is stopped, the second operating arm is displaced to rotate the rotary shaft, and the first operating arm is interlocked to move the interlocking rod. it can. At this time, the tip of the motor arm is in a state of being movable along the elongated hole of the interlocking rod. Further, in the electric drive mechanism, by monitoring the operating time of the motor and comparing it with the operating time of the motor in the normal state, if there is a difference, it is determined that some abnormality has occurred and the display means displays it.
The motor can be stopped by turning off the power.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an electric / manual interlocking lock mechanism for casters in a bed or the like according to the present invention and an operation control method thereof will be described below with reference to the accompanying drawings by way of an embodiment. In FIG. 1, reference numeral 1 denotes a bed, and a base frame 2 of the bed 1 is provided with casters 3 at four corners and is provided with an electric / manual interlocking lock mechanism 4. A lock mechanism (described later) is built in the casters 3, and a rotating shaft 5 for transmitting power to the lock mechanism connects the casters 3 facing each other in the width direction of the bed 1 in an interlockable manner.

The electric / manual interlocking lock mechanism 4 is
The caster 3 includes an electric drive mechanism 6 for transmitting power to the rotary shaft 5 and a manual operation mechanism for manually rotating the rotary shaft 5, that is, a stepping-type drive operation mechanism 7. The electric drive mechanism 6 is connected to a first actuating arm 8 projecting on the rotary shaft 5 via an interlocking rod 9, and a stepping type drive operating mechanism 7 is projected on the rotary shaft 5. It is connected to the second operating arm 10 via an interlocking rod 11.

As shown in FIGS. 2 and 3, the electric drive mechanism 6 includes a mounting member 1 provided on a base frame 2.
2, the motor 13 mounted on the motor 2, and the drive shaft 14 of the motor 13.
A motor arm 15 having a radial length of the motor 13 mounted so as to be oriented in the radial direction of the motor 13, and a distal end portion of the motor arm 15 is an elongated hole formed along the axial direction of the interlocking rod 9. It is configured so that it can be movably fitted in 16. The first limit switch 17 for detecting the operating position of the motor arm 15 is arranged so as to face each other in the radial direction passing through the drive shaft 14 of the motor 13.
And a second limit switch 18 are provided.
The first and second limit switches 17 and 18 and the motor arm 15 are connected to each other via the detection member 19 attached to the motor arm 15.
It is the structure which contacts the operators 17a and 18a of 7 and 18 (refer to FIG. 4). The electric operation mechanism 6 is provided with an operation switch box 20 on the floor of the bed 1 so that it can be remotely operated. The operation switch box 20 includes a start switch 21 and casters 3. A display lamp 22 for displaying the locked state of the lock mechanism is provided. Further, the operation switch box 20 includes a control circuit (described later) for controlling the drive of the electric drive mechanism 6.

As shown in FIG. 5, the stepping-type drive operation mechanism 7 is provided with a stepping-on drive provided near the caster 3 on the side opposite to the caster 3 on which the first operating arm 8 and the second operating arm 10 are provided. The caster 3 has a step 23 and a triangular link 24 attached to the turning shaft 5 of the caster 3 in the vicinity of one apex thereof. The shaft 25 of the stepping step 23 is rotatably attached to the column of the caster 3, and the triangular link is provided. 24 in the vicinity of the other apexes of the step 2
The interlocking shaft 26 and the interlocking rod 11 communicating with the second actuating arm 10 are connected to each other at the distal end of 5.

The electric / manual interlocking lock mechanism 4 as described above has an operation switch box 20 as shown in FIG.
The driving operation is performed by an operation command of the control circuit 27 incorporated in the control circuit 27. The control circuit 27 energizes the motor 13 by turning on the start switch 21, and at the same time, the first and second limit switches 17, 18 are connected. The ON / OFF signal of the motor arm 15 detects the rotational position of the motor arm 15 to determine the lock state of the lock mechanism in the caster 3. When the first limit switch 17 is ON, it is determined that the lock mechanism in the caster 3 is in the lock state. , Indicator lamp 2
2 is energized to turn on, or the motor 13 is energized and deenergized to control the start and stop of the motor 13.

Next, the casters 3 will be described. That is, as shown in FIG.
The column 29 has a support 29 for holding the wheel 28, and the lock mechanism 30 is built in the support 29. The pillar 29
The rotating shaft 5 penetrates in the upper part, and the cam 31 is pivotally supported. An operating rod 32 is in contact with the cam 31, and an operating piece 34 to be brought into contact with an inner ring 33 interlocking with the wheel 28 is provided near the tip of the operating rod 32.

The electric / manual interlocking lock mechanism 4 according to the present invention is constructed as described above, and its operation will be described with reference to the flow chart shown in FIG. Start switch 2 in operation switch box 20
Perform the ON operation of 1. At this time, when it is determined that the detection member 19 attached to the motor arm 15 is in contact with the manipulator 17a of the first limit switch 17 and is in the ON state (STP1), the control circuit 27 causes the operation switch box 20 to display the indicator lamp. 22 is turned on (STP2),
It is determined whether the start switch 21 is on (STP
3). On the other hand, when the first limit switch 17 is off, it is immediately determined whether or not the activation switch 21 is on. Since the start switch 21 is turned on, the motor 13 is energized and the motor 13 is started (STP
4) The drive shaft 14 rotates. Then, the motor arm 1
When the tip of 5 is located in the middle of the slot 16 of the interlocking rod 9, only the tip of the motor arm 15 slides along the slot 16 to reach the end of the slot 16. The interlocking rod 9 is in a state of being dynamically connected. Then, the rotary shaft 5 rotates via the first actuating arm 8, and the lock mechanism 30 of the caster 3 enters a locked state. At that time, as the rotary shaft 5 rotates, the interlocking rod 11 is interlocked and displaced via the second operating arm 10,
The triangular link 24 and the interlocking shaft 26 are sequentially displaced, and the stepping step 23 is displaced so that the stepping state is achieved. Therefore, the rotary shaft 5 is rotated by the displacement of the triangular link 24, and the caster 3 on the stepping-in step 23 side is also locked. Further, the drive shaft 14 of the motor 13 continues to rotate, the motor arm 15 is displaced, and the detection member 19 comes into contact with the operator 18a of the second limit switch 18,
The second limit switch 18 is turned on (STP5),
The control circuit 27 stops energizing the motor 13 (S
TP6). In this case, the tip of the motor arm 15 only moves in the long hole 16 of the interlocking rod 9, so that the interlocking rod 9 is
It is only rotationally displaced around the connection point with the first operating arm 8, no power is applied to the first operating arm 8, and the caster 3
Remains locked. The state of the electric / manual interlocking lock mechanism 4 is shown in FIG. In this state,
Since the first limit switch 17 is off (STP
7), the execution procedure of the electric drive mechanism 6 is completed.

The operation in the event of a power outage will now be described. Since the casters 3 are in the locked state, when the casters 3 are unlocked and freed, the stepping step 23 of the stepping-type drive operation mechanism 7 is pulled up. In this case, as shown in FIG. 9, the interlocking rod 9 can be displaced to the right by the length of the slot 16 with respect to the tip of the motor arm 15 without being restrained from the tip of the motor arm 15. It is possible. Therefore, step 2
By the pulling operation of 3, the shaft 25 is displaced and the interlocking shaft 26,
The triangular links 24 are interlocked with each other so that the rotary shaft 5 can be rotated. As a result, the interlocking rod 11 interlocks so as to be pulled toward the step 23 side by depressing, and the second operating arm 1
The rotary shaft 5 on the electric drive mechanism 6 side rotates via 0. Therefore, the first operating arm 8 is also displaced, and the caster 3 can be unlocked (see FIG. 10).

The operation of unlocking the caster 3 from the locked state shown in FIG. 9 by the electric drive mechanism 6 will be described. By starting the motor 13, the motor arm 15
Is transmitted to the interlocking rod 9, the first operating arm 8 rotates clockwise, the rotating shaft 5 rotates, and the caster 3 is unlocked. Similarly, the second operating arm 10 displaces the interlocking rod 11 to the right in the same manner, displaces the triangular link 24 to rotate the rotating shaft 5, and unlocks the caster 3 on the stepping step 23 side. , Stepping step 23 is raised (see FIG. 11). Then, the motor 13 operates and stops until the detection member 19 of the motor arm 15 reaches the operating element 17a of the first limit switch 17 (see FIG. 12).

When the casters 3 are in a free state and the casters 3 are locked during a power failure, the stepping operation in step 23 is performed. At this time, since the interlocking rod 9 is not in the restraining state with the motor arm 15 due to the elongated hole 16, the interlocking rod 9 is displaced by the interlocking rod 11 so that the second operating arm 1
The rotary shaft 5 can be interlocked via the 0 and the first operating arm 8 to be displaced leftward (see FIG. 13).

On the other hand, when the electric drive mechanism 6 is started from the caster 3 in the free state in FIG. 12, the motor arm 15 acts on the interlocking rod 9 and the first operating arm 8 to cause the rotary shaft 5 to rotate.
While rotating the second operating arm 10, the triangular link 24, and the stepping step 23,
Can be locked. Then, when the detection member of the motor arm 15 shown in FIG. 9 comes into contact with the operating element 17a of the first limit switch 17, the motor 13 is stopped, the display lamp 22 is turned on, and the operation is completed (see FIG. 14). ).

As described above, the casters 3 can be locked and unlocked electrically, and the elongated hole 1 of the interlocking rod 9 can be locked.
The electric drive mechanism 6 and the rotary shaft 5 that communicates with the lock mechanism 30 of the caster 3 form a power-free state, so that the pedal can be depressed at the time of a power failure or in a place where there is no power supply equipment. The operation mechanism 7 is replaced by the electric drive mechanism 6
It can be operated without any trouble without being restricted by.

Next, an electric / manual interlocking lock mechanism for casters in a bed or the like according to the present invention and an operation control method thereof will be described with reference to another embodiment. The constituent elements substantially similar to those in the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted. Figure 1
As shown in FIG. 5, in the electric / manual interlocking lock mechanism 40 according to the present embodiment, the motor arm 42 attached to the drive shaft 14 of the motor 13 in the electric drive mechanism 41.
Has the diameter length of the motor 13 and the middle portion thereof is the drive shaft 14
It is attached to. In addition, the motor arm 42
Limit switch detection members 43, 44
Are projected in a point-symmetrical manner with respect to the drive shaft 14. In this embodiment, only the limit switch 45 is installed. In the present embodiment, the rotation of the motor arm 42 causes the detection members 43 and 44 to come into contact with the limit switch 45, whereby the caster 3 is locked,
It is configured to detect a free state. Note that FIG.
Then, the second actuating arm 10 and the interlocking shaft 11 constituting the stepping-type drive operation mechanism 7 are omitted. Further, the operational relationship between the electric drive mechanism 41 and the stepping-type drive operation mechanism 7 is the same as that in the previous embodiment, and therefore its action and operation description will be omitted.

An electric / manual interlocking lock mechanism for a caster in a bed or the like according to the present invention and an operation control method thereof are shown in FIG.
Can also be achieved by. In the electric drive mechanism 51 in this case, the electric / manual interlocking lock mechanism 40 in the above-described embodiment is separately provided with a limit switch 52 for indicating the lock state of the caster 3 in the motor 13, and the first operating arm 8 is provided. The limit switch 52 is provided with an operating shaft 53 for contacting and operating. A long hole 54 is bored in the tip of the operating shaft 53, so that the motor 1
The support pin 55 provided on the No. 3 loosely fits and supports the elongated hole 54. The operating shaft 53 is provided with a protrusion member 56 for contacting the limit switch 52. By the displacement of the first operating arm 8, the operating shaft 53 is interlocked with the interlocking rod 9. Also in this embodiment,
A second actuating arm 10 that constitutes the stepping-type drive operation mechanism 7,
The interlocking shaft 11 is omitted, and the operational relationship between the electric drive mechanism 51 and the stepping-type drive operation mechanism 7 is the same as in the previous embodiment.

The control circuit 27, which is the operation control means of the electric / manual interlocking lock mechanism 50, is provided with a timer (not shown) for measuring the starting time of the motor 13. In this case, by measuring the starting time of the motor 13,
If the motor 13 has been activated for a time longer than the set time, it is determined that an abnormal state such as a foreign object being caught in the mechanism or the like has occurred, and the indicator lamp 22 of the operation switch box blinks to stop the motor 13. It has the function of executing the means (see FIG. 17).

Here, an electric / manual interlocking lock mechanism 5
0 will be described with reference to the flowchart shown in FIG. Start switch 2 in operation switch box 20
Perform the ON operation of 1. At this time, if the operating shaft 53 is displaced and the protruding member 56 is in contact with the limit switch 52, the limit switch 52 is on (STP
1) The display lamp 22 is turned on (STP2), and it is determined whether or not the start switch 21 is on (STP3). On the other hand, when the limit switch 17 is off, it is immediately determined whether the start switch 21 is on. Since the start switch 21 is turned on, the motor 13 is energized, the motor 13 is started (STP4), and the control circuit 27
Timer starts measuring the starting time of the motor 13 (ST
P5). Then, when the limit switch 52 is on (STP6), the display lamp 22 is turned on (STP).
7) The timer measurement time is compared with the normal operation time of the motor 13 to judge (STP8). When the operating time of the motor 13 is reached, if the limit switch 44 is on (STP9), it is determined that the motor 13 operates normally, and the motor 13 is stopped (STP10), and the execution is completed. On the other hand, in STP8, if the operation time of the normal motor 13 is exceeded, the display lamp 22 is blinked (STP11) as if the motor arm does not move due to an object being caught and the limit switch 44 is not pressed (STP11). The power supply to the motor 13 can be cut off to stop the motor 13.

After the motor 13 is stopped, the stepping-type drive operating mechanism 7 can be operated (STP1).
2). Then, when the first operating arm 8 is displaced by a manual operation, the operating shaft 53 moves and the limit switch 52 is turned on when the projecting member 56 comes into contact with the limit switch 52. Is completed. On the other hand, if the limit switch 52 is off, the caster 3 is considered to be free, and the procedure ends.

As described above, in any of the embodiments, the lock mechanism 30 of the caster 3 is connected to the electric drive mechanisms 6, 41, 5.
1 can be quickly locked and unlocked, the labor is reduced, and the electric drive mechanisms 6, 41, 51 and the lock mechanism 30 are mechanically separated from each other, so that a power failure can be achieved. At any time, since the lock mechanism 30 of the caster 3 can be easily operated manually, there is no problem even in an emergency.

[0024]

As described above, according to the present invention, the casters can be locked and unlocked electrically, so that the operability is significantly improved and the manual operation is possible even during a power failure. However, there is a great advantage that it can be fully supported.

[0025]

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a base frame of a bed or the like provided with an electric / manual interlocking lock mechanism for casters according to the present invention.

FIG. 2 is a perspective view for explaining an essential part of an electric / manual interlocking lock mechanism of the caster shown in FIG.

FIG. 3 is an enlarged side view of a main part of the electric drive mechanism shown in FIG.

FIG. 4 is a perspective view of a main part of the electric drive mechanism shown in FIG.

FIG. 5 is a mechanism explanatory view of an electric / manual interlocking lock mechanism of a caster according to the present invention.

FIG. 6 is a block diagram for controlling the operation of the electric drive mechanism in the electric / manual interlocking lock mechanism of the caster according to the present invention.

7 is a partial cross-sectional explanatory view showing the configuration of the lock mechanism of the caster shown in FIG.

FIG. 8 is a flowchart for explaining the operation of the electric drive mechanism in the electric / manual combined lock mechanism of the caster according to the present invention.

9 is an operation explanatory view of the electric / manual interlocking lock mechanism of the caster shown in FIG.

10 is an operation explanatory view of the combined electric / manual interlocking lock mechanism of the caster shown in FIG.

11 is an operation explanatory view of the combined electric / manual interlocking lock mechanism of the caster shown in FIG.

12 is an operation explanatory view of the electric / manual interlocking lock mechanism of the caster shown in FIG.

13 is an operation explanatory view of the electric / manual interlocking lock mechanism of the caster shown in FIG.

14 is an operation explanatory view of the combined electric / manual interlocking lock mechanism of the caster shown in FIG.

FIG. 15 is an enlarged side view for explaining an essential part of an electric drive mechanism of an electric / manual interlocking lock mechanism of a caster according to another embodiment.

FIG. 16 is an enlarged side view for explaining an essential part of an electric drive mechanism of a combined electric / manual interlocking lock mechanism of a caster according to another embodiment.

17 is a block diagram for performing operation control of an electric drive mechanism in the electric / manual interlocking lock mechanism of the caster shown in FIG.

FIG. 18 is a flowchart for explaining the operation of the electric drive mechanism in the electric / manual interlocking lock mechanism of the caster shown in FIG. 16;

[Explanation of symbols]

1 bed 2 base frame 3 casters 4, 40, 50 electric / manual interlocking lock mechanism 5 rotary shafts 6, 41, 51 electric drive mechanism 7 stepping type drive operation mechanism 8 first operating arm 9 interlocking rod 10 second operating arm 11 interlocking rod 12 mounting member 13 motor 14 drive shaft 15 motor arm 16 long hole 17 first limit switch 18 second limit switch 19 detection member 20 operation switch box 21 start switch 22 display lamp 23 stepping step 24 triangular link 25 shaft 26 Interlocking shaft 27 Control circuit 28 Wheel 29 Strut 30 Lock mechanism 31 Cam 32 Actuating rod 33 Inner ring 34 Actuating piece 42 Motor arm 43, 44 Detecting member 45, 52 Limit switch 53 Actuating shaft 54 Long hole 55 Support pin 56 Projecting member

Claims (8)

[Claims] 1. A caster such as a bed provided with a lock mechanism, wherein the lock mechanism has a rotary shaft for transmitting power for locking operation, and a mechanism for intermittently transmitting power to the rotary shaft. The electric drive mechanism is connected to the rotary shaft via a manual operation mechanism, and the electric drive mechanism is provided with remote operation means for locking the caster or for setting the caster in a free state. A detection means for detecting the operating state of the mechanism is provided, and the remote operation means is provided with a display means for displaying the lock state of the caster based on a detection signal of the detection means, and the manual operation mechanism is provided for the electric drive mechanism. An electric / manual interlocking lock mechanism for casters in beds etc. that can be operated when stopped. 2. The mechanism for intermittently transmitting power according to claim 1, wherein a first operating arm projecting from the rotary shaft and the first operating arm are provided.
Having an interlocking rod connected to the operating arm, the electric drive mechanism,
A structure having a motor and a motor arm attached to a drive shaft of the motor, wherein the interlocking rod is provided with an elongated hole along the axial direction, and the distal end portion of the motor arm is movably fitted into the elongated hole. An electric / manual interlocking lock mechanism for casters in beds, etc. 3. The manual operating mechanism according to claim 1, wherein
A second actuating arm is provided so as to project on the rotary shaft on which the actuating arm is projected, and a triangular shape is provided on the rotary shafts of the casters on the side opposite to the casters on which the first and second actuating arms are provided. Attach near one apex of the link, attach a stepping step rotatably to the pillar of the opposite caster and connect the tip of the stepping step to the other apex of the triangular link via an interlocking shaft, Furthermore, an electric / manual interlocking lock mechanism for casters in a bed or the like, characterized in that an interlocking rod communicating with the second operating arm is connected near the remaining apexes of the triangular link. 4. The detection means according to claim 1, comprising a first limit switch and a second limit switch which are arranged at positions facing each other with the drive shaft of the motor interposed therebetween, and the detection means is provided so as to project from the motor arm. The members are brought into contact with each other by driving the motor, the first limit switch is for detecting the lock state of the casters, and the second limit switch is for detecting the free state of the casters. Electric casters for beds, etc.
Interlocking lock mechanism for both manual and manual use. 5. The combined electric / manual interlocking mechanism for casters according to claim 1, wherein the electric drive mechanism is activated to detect the caster lock state by observing the on / off state of the first limit switch, and the first limit If the switch is on, the display means is turned on to determine whether or not the electric drive mechanism is on. If the electric drive mechanism is on, the motor is rotated and the detection member of the motor arm is set to the second position. The motor is stopped by abutting against the limit switch, and if the first limit switch is turned on and off, the motor is stopped if it is off, and if it is on, it is displayed by the display means. Operation control method. 6. The electric drive mechanism according to claim 2, wherein the intermediate portion of the motor arm is attached to the drive shaft of the motor, and the detection member for detecting the lock state of the caster at both end portions of the motor arm and the free state of the caster. A caster in a bed or the like which is provided with a detection member for detecting a motor, and which is provided with one motor drive control detection unit so that these detection members come into contact with each other. Dual-use interlocking lock mechanism. 7. The electric drive mechanism according to claim 6, further comprising detection means for detecting a lock state of the casters,
An actuating rod is connected to the first actuating arm, a long hole is formed at the tip of this actuating rod, and a supporting member is fitted in the long hole to movably support it, while a detecting member that comes into contact with the detecting means is provided. Electric / manual interlocking lock mechanism for casters in beds etc. characterized by being configured. 8. The electric / manual interlocking lock mechanism for a caster according to claim 7, wherein the electric drive mechanism is activated to detect the locked state of the caster, and if the caster is in the locked state, the display means is turned on. If the electric drive mechanism is in the ON state, and if the electric drive mechanism is in the ON state, the motor is started and the timer is started.
Turn on the display means, compare the time when the motor is in the starting state with the time when it is normal, and if it is normal, judge the caster lock state to stop the motor, and if it is not normal, blink the display means. The motor is characterized in that while the motor is stopped and the motor is stopped, the caster is locked when the manual operation is performed after the motor is stopped, and if the caster is in the locked state, the display means is turned on and displayed. /
Operation control method of manual and interlocking lock mechanism.