Sliding door device

Abstract

To provide a sliding door device capable of opening and closing a sliding door with a small force and instantaneously stopping the movement of the sliding door without applying a load to a motor, a rotor or the like.SOLUTION: The sliding door device 10 includes a frame body 11, a sliding door 20, and a motor 43. The frame body 11 includes a top frame 12, a door end vertical frame 13, and a door tail vertical frame 14. The sliding door 20 travels in a predetermined direction along the rail 30 by the rotational movement of the gear 42. When the gear 42 is forcibly rotated in a predetermined direction, the motor 43 rotationally drives the gear 42 in the predetermined direction. The motor 43 decelerates the rotational driving of the gear 42 when the distance between the door tip 21 of the sliding door 20 and the door tip vertical frame 13 or the distance between the door tip 21 of the sliding door 20 and the door end vertical frame 14 becomes equal to or less than a predetermined distance. When the rotation of the gear 42 is forcibly stopped, the motor 43 stops the rotational driving of the gear 42.SELECTED DRAWING: Figure 1A

Description

[Technical Field]

[0001] The present invention relates to a sliding door device to be installed in, for example, a house or the like. [Background technology]

[0002] Conventionally, this type of sliding door device is provided for an automatically opening and closing sliding door that moves while being guided by upper and lower guide members, as shown in Patent Document 1, for example. The sliding door device of Patent Document 1 includes a rotor that rotates in contact with the guide members, a motor connected to the rotation shaft of the rotor, a rechargeable battery, a sensor that detects a predetermined position of the guide members, and a control circuit network that controls the connection state between the motor and the battery depending on the detection state of the sensor. The sliding door device of Patent Document 1 brakes the sliding door depending on the connection state of the control circuit network, motor, and battery in accordance with the predetermined position of the sliding door detected by the sensor. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-193680 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in conventional sliding door devices such as that shown in Patent Document 1, the sliding door is braked according to the predetermined position of the sliding door detected by a sensor, so if a user or the like collides with the sliding door at a position other than the predetermined position while the sliding door is automatically opening or closing, it is difficult to stop the sliding door instantly without putting a load on the motor, rotating body, etc. Furthermore, in conventional sliding door devices, the motor starts to rotate when the sliding door moves to the predetermined position detected by the sensor, so the user needs to move the sliding door to the predetermined position in order to open or close the sliding door automatically.

[0005] Therefore, an object of the present invention is to provide a sliding door device that can automatically open and close a sliding door with a small force and can instantly stop the movement of the sliding door without placing a load on a motor, a rotating body, etc. [Means for solving the problem]

[0006] The problem to be solved by the present invention has been described above, and the means for solving this problem will now be described.

[0007] In other words, the sliding door device of the present invention comprises a frame body having at least a top frame, a vertical door front frame, and a vertical door rear frame, a sliding door that travels in a predetermined direction along a rail provided on the top frame side between the vertical door front frame and the vertical door rear frame by the rotational movement of a rotating body, and a motor that drives the rotation of the rotating body, and the motor drives the rotating body to rotate in the predetermined direction by forcibly rotating the rotating body in the predetermined direction, and when the distance between the door front of the sliding door and the vertical door front frame or the distance between the door rear of the sliding door and the vertical door rear frame becomes less than a predetermined distance, the rotational drive of the rotating body is decelerated and the rotation of the rotating body is forcibly stopped, thereby stopping the rotational drive of the rotating body.

[0008] In the present invention, the motor has a drive unit that drives the rotating body to rotate, and a control unit that controls the drive unit, and the control unit reduces the rotational drive of the rotating body by the drive unit when the door tip of the sliding door is moved a predetermined distance from the door tip vertical frame or the door tail vertical frame.

[0009] The present invention comprises a detection object arranged at a position a predetermined distance away from the door front vertical frame or the door rear vertical frame, and a sensor that detects the detection object, wherein the motor has a drive unit that drives the rotating body to rotate, and a control unit that controls the drive unit, and the control unit reduces the rotational drive of the rotating body by the drive unit when the sensor detects the detection object.

[0010] In the present invention, the motor is capable of adjusting the torque for rotationally driving the rotor or the rotation speed of the rotor in accordance with the weight of the sliding door. [Effects of the Invention]

[0011] According to the present invention, even if a user or the like collides with the sliding door during automatic opening and closing of the sliding door and the rotation of the rotor is forcibly stopped, the motor can instantly stop the rotational drive of the rotor. Therefore, the sliding door can be stopped instantly without applying a load to the motor, rotor, etc. Furthermore, when a user or the like moves the sliding door in a predetermined direction, the rotor is forcibly rotated in the predetermined direction and the motor instantly drives the rotor to rotate, so that automatic opening and closing of the sliding door can be started with a small force. [Brief explanation of the drawings]

[0012] [Figure 1A] 1 is a schematic front view showing a state in which the sliding door of the sliding door device according to the present invention is fully closed. [Figure 1B] 1 is a schematic front view showing a state in which the sliding door of the sliding door device according to the present invention begins to open. [Figure 2A] FIG. 1B is an enlarged front view of the door-front side running body in FIG. 1A. [Figure 2B] 1B is an enlarged left-side cross-sectional view of the door-front-side running body in FIG. 1A. FIG. [Figure 3] FIG. 1B is a block diagram showing the control configuration of the door-front side traveling body in FIG. 1A. [Figure 4] 1B is a schematic plan view showing the running state of the door-end side running body in FIG. 1A. FIG. [Figure 5] FIG. 10 is a block diagram showing the control configuration of a door-leading-side traveling body in another embodiment of the sliding door device according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0013] First, a sliding door device 10 according to an embodiment of the present invention will be described with reference to the drawings.

[0014] 1A and 1B, the sliding door device 10 is for automatically opening and closing a sliding door 20 that opens and closes an opening K formed by a frame body 11. The sliding door device 10 mainly comprises the frame body 11, the sliding door 20, a rail 30, a door-leading side running body 40, and a door-trailing side running body 50.

[0015] The frame body 11 is composed of at least a top frame 12, a vertical door edge frame 13, and a vertical door edge trailing edge frame 14. The frame body 11 forms an opening K with the top frame 12, the vertical door edge frame 13, and the vertical door edge trailing edge frame 14. The top frame 12 is a horizontal frame that forms the upper part of the opening K. The vertical door edge frame 13 is a vertical frame that forms one end of the opening K and is provided on the door edge 21 side of the sliding door 20. The vertical door edge trailing edge frame 14 is a vertical frame that forms the other end of the opening K and is provided on the door edge 22 side of the sliding door 20. The opening K is, for example, a space that connects the outside and the inside of the room. In the following description, the door edge 21 side of the sliding door 20 is referred to as the right side (i.e., the door edge 22 side of the sliding door 20 is referred to as the left side), and the front side is referred to as the outside side (i.e., the rear side is referred to as the inside side).

[0016] 1A and 1B, the sliding door 20 moves between the leading edge vertical frame 13 and the trailing edge vertical frame 14 while being guided by the rail 30 inside the frame body 11. In this way, the sliding door 20 opens and closes the opening K. The sliding door 20 has a leading edge-side running body 40 and a trailing edge-side running body 50 for being hung from the rail 30, and a grip part 23 provided on the leading edge 21 side to allow the user to move the sliding door 20 left and right.

[0017] The rail 30 is a rail for moving the sliding door 20 in the opening / closing direction (left and right direction). The rail 30 is provided on the top frame 12 side between the door-end vertical frame 13 and the door-end vertical frame 14. As shown in FIGS. 2A and 2B , the rail 30 has a top surface portion 31, a front side surface portion 32, and a rear side surface portion 33, and is formed from a member with a substantially channel-shaped cross section with an open bottom. Inside the rail 30, a running portion 34 that is substantially inverted J-shaped in side view is provided to extend along the top frame 12.

[0018] 2B, running portion 34 has fixed portion 35 fixed to rear side portion 33, flat portion 36 extending horizontally from fixed portion 35, and protruding portion 37 protruding upward from flat portion 36. A rack 38 is fixed to flat portion 36 in the longitudinal direction thereof.

[0019] As shown in Figures 1A, 2A and 3, the door-leading side running body 40 has a drive side main body 41 attached to the upper end surface of the door leading side of the sliding door 20, a gear 42 that rotates while meshing with the rack 38, a motor 43 that rotates and drives the gear 42, a driven wheel 44 that is rotatably supported by the drive side main body 41, and a sensor 45 that detects the door-leading side metal plate 53 and the door-trailing side metal plate 54 that are provided inside the rail 30.

[0020] The drive side main body 41 has a drive side wall portion 46 that supports the motor 43, driven wheel 44, and sensor 45, and a drive side base portion 47 that contacts the upper end surface of the sliding door 20 and serves as a base for the drive side wall portion 46. The gear 42 is a moving rotating body that rotates while meshing with a rack 38 formed on the flat portion 36 of the running portion 34. The gear 42 is connected to the rotating shaft of the motor 43 and is driven. When the gear 42 is driven to rotate, the rotational motion of the gear 42 is converted into linear motion by the rack 38, and the door-end side running body 40 runs along the rail 30 (running portion 34).

[0021] 3, the motor 43 has a drive unit 48 that drives the gear 42 to rotate, and a control unit 49 that controls the drive unit 48. The drive unit 48 rotates the rotation shaft of the motor 43 based on a control signal from the control unit 49, and transmits the rotation to the gear 42.

[0022] The control unit 49 controls the rotation speed of the gear 42 by controlling the drive unit 48, and thereby controls the travel speed of the sliding door 20. The control unit 49 is electrically connected to the sensor 45. The control unit 49 is configured to be able to control the drive unit 48 based on a detection signal from the sensor 45.

[0023] The motor 43 is connected via a cable 91 to a power source 90 provided outside the door-leading side running body 40. The cable 91 is held by a chain-like guide member 92 (see FIG. 2A) that can bend to follow the movement of the door-leading side running body 40. The motor 43 can adjust the torque for rotating the gear 42 or the rotation speed of the gear 42 according to the weight of the sliding door 20. Specifically, the motor 43 detects the load on the motor 43 according to the weight of the sliding door 20 and adjusts the voltage to maintain the torque or the rotation speed of the gear 42 within a certain range.

[0024] The sensor 45 is a metal sensor or a magnetic sensor. When the sensor 45 detects the door-leading side metal plate 53 or the door-trailing side metal plate 54, which is the detection object, the sensor 45 transmits a detection signal to the control unit 49.

[0025] 1A and 1B, the leading-door-side metal plate 53 is a rectangular metal plate extending from the leading-door vertical frame 13 toward the trailing-door vertical frame 14 inside the rail 30. The leading-door-side metal plate 53 is a detection object detected by the sensor 45, and is disposed so that its trailing-door-side end portion 53a is a first predetermined distance L1 away from the leading-door vertical frame 13. That is, at least a portion of the leading-door-side metal plate 53 is disposed at a position that is the first predetermined distance L1 away from the leading-door vertical frame 13. Here, the first predetermined distance L1 is a distance that prevents a user's finger from being pinched by the leading-door edge 21 and the leading-door vertical frame 13 when the user's finger gets between them, and also a distance that allows the sliding door 20, which is automatically traveling at a predetermined speed from the trailing-door edge 22 side, to decelerate and stop without causing the leading-door edge 21 to collide with the leading-door vertical frame 13.

[0026] The trailing edge side metal plate 54 is a rectangular metal plate that extends from the entrance portion 15a of the door pocket 15 toward the trailing edge vertical frame 13 inside the rail 30. The trailing edge side metal plate 54 is an object to be detected by the sensor 45, and is disposed so that its trailing edge side end portion 54a is located a second predetermined distance L2 away from the trailing edge vertical frame 14. In other words, at least a portion of the trailing edge side metal plate 54 is disposed a second predetermined distance L2 away from the trailing edge vertical frame 14. Here, the second predetermined distance L2 is a distance at which the sliding door 20, which is automatically traveling at a predetermined speed from the door edge 21 side, can decelerate and stop without causing the trailing edge 22 to collide with the trailing edge vertical frame 14.

[0027] 2B, the driven wheel 44 rotates along the protruding portion 37 of the running part 34. The driven wheel 44 rotates as the door-end side running body 40 (drive side main body 41) runs along the rail 30 due to the rotational movement of the gear 42.

[0028] As shown in Figures 1A and 1B, the trailing edge side running body 50 has a driven side main body 51 attached to the upper end surface of the trailing edge side of the sliding door 20, and a driven side wheel 52 provided on the driven side main body 51 and rolling on the running portion 34 of the rail 30.

[0029] The driven-side main body 51 has a driven-side wall body portion 55 that supports the driven-side wheel 52, and a driven-side base portion 56 that contacts the upper end surface of the sliding door 20 and serves as a base for the driven-side wall body portion 55. The driven-side wheel 52 is a rotating body that rotates along the running portion 34 of the rail 30. The driven-side wheel 52 rotates by being connected to a rotating shaft that is rotatably supported on the driven-side wall body portion 55. The driven-side wheel 52 rotates as the gear 42 of the door-leading-side running body 40 rotates and the sliding door 20 runs along the rail 30.

[0030] Next, a description will be given of the operation of the sliding door 20 and the control by the control unit 49 of the motor 43 in the door-leading side running body 40. First, a description will be given of the case where the sliding door 20 is automatically closed.

[0031] For example, when a user grips the grip portion 23 of the sliding door 20 and moves the sliding door 20 rightward by a third predetermined distance L3 (see FIG. 1B), the driving of the motor 43 is started. That is, when the user moves the sliding door 20 rightward by the third predetermined distance L3, the gear 42 of the door-leading side running body 40 is forcibly rotated rightward. Here, the third predetermined distance L3 by which the sliding door 20 moves is the minimum distance from the entrance 15a of the door pocket 15 that the sliding door 20 should move in order to close by automatic travel.

[0032] The gear 42 is forcibly rotated clockwise, which rotates the rotary shaft of the motor 43. The control unit 49 of the motor 43 detects that the gear 42 is being forcibly rotated by the rotation of the rotary shaft of the motor 43, and controls the drive unit 48 to start driving the motor 43.

[0033] When the motor 43 starts to be driven, the drive unit 48 rotates the gear 42 to the right. As a result, the gear 42 rotates while meshing with the rack 38, and the sliding door 20 automatically moves to the right at a predetermined speed. Here, as shown in Figure 4, the door-leading side running body 40 runs in the normal region R1 where it runs at a predetermined speed.

[0034] Furthermore, as shown in FIGS. 2A and 4, as the door-edge-side runner 40 travels to the right, the sensor 45 detects the door-edge-side metal plate 53 and transmits a detection signal to the control unit 49. By receiving the detection signal, the control unit 49 determines that the door edge 21 of the sliding door 20 has traveled to a point a first predetermined distance L1 before the vertical door edge frame 13, and controls the drive unit 48 to decelerate the rotational speed of the gear 42. As a result, the door edge-side runner 40 decelerates (travels through the first deceleration region R2 shown in FIG. 4), and the sliding door 20 decelerates and travels from a point a first predetermined distance L1 before the vertical door edge frame 13. Finally, the door edge 21 of the sliding door 20 abuts against the vertical door edge frame 13, and the sliding door 20 stops in a fully closed state. By decelerating the sliding door 20 from a point a first predetermined distance L1 before the vertical door edge frame 13 in this way, it is possible to prevent fingers from getting caught between the door edge 21 and the vertical door edge frame 13.

[0035] Next, a case where the sliding door 20 is automatically opened will be described. For example, when a user grips the grip portion 23 of the sliding door 20 and moves the sliding door 20 leftward by a fourth predetermined distance L4 (see FIG. 1B), the driving of the motor 43 is started. That is, when the user moves the sliding door 20 leftward by the fourth predetermined distance L4, the gear 42 of the door-leading side running body 40 is forcibly rotated leftward. Here, the fourth predetermined distance L4 by which the sliding door 20 moves is the minimum distance that the sliding door 20 should be moved in order to open by automatic travel.

[0036] The gear 42 is forced to rotate counterclockwise, which rotates the rotary shaft of the motor 43. The control unit 49 of the motor 43 detects that the gear 42 is being forced to rotate due to the rotation of the rotary shaft of the motor 43, and controls the drive unit 48 to start driving the motor 43.

[0037] When the motor 43 starts to operate, the drive unit 48 rotates the gear 42 to the left. As a result, the gear 42 rotates while meshing with the rack 38, and the sliding door 20 automatically moves to the left at a predetermined speed. Here, as shown in FIG. 4, the leading-edge runner 40 travels through the normal region R1, where it travels at a predetermined speed. Furthermore, as shown in FIGS. 1A, 1B, and 4, as the leading-edge runner 40 travels to the left, the sensor 45 detects the trailing-edge metal plate 54 and transmits a detection signal to the control unit 49. Upon receiving the detection signal, the control unit 49 determines that the leading edge 21 of the sliding door 20 has traveled to a point a second predetermined distance L2 short of the trailing edge frame 14, and controls the drive unit 48 to decelerate the rotational speed of the gear 42. In other words, upon receiving the detection signal, the control unit 49 determines that the distance between the trailing edge 22 of the sliding door 20 and the trailing edge frame 14 has become equal to or shorter than the predetermined distance, and controls the drive unit 48 to decelerate the rotational speed of the gear 42. Here, the predetermined distance is a distance at which the sliding door 20, which is automatically traveling at a predetermined speed from the door tip 21 side, can stop while decelerating without causing the door tail 22 to collide with the vertical door tail frame 14. As a result, the door tip-side traveling body 40 decelerates (travels in the second deceleration region R3 shown in FIG. 4), and the sliding door 20 travels at a reduced speed from a point a second predetermined distance L2 before the vertical door tail frame 14. Eventually, the door tail 22 of the sliding door 20 abuts against the vertical door tail frame 14, and the sliding door 20 stops in a fully open state.

[0038] In this way, in the door-leading side running body 40, when the sensor 45 detects the door-leading side metal plate 53 or the door-trailing side metal plate 54, the control unit 49 of the motor 43 determines, based on the detection signal from the sensor 45, that the door leading side 21 or the door trailing side 22 of the sliding door 20 has traveled to a position a predetermined distance before the door leading vertical frame 13 or the door trailing vertical frame 14, and controls the drive unit 48 of the motor 43 to decelerate the rotational speed of the gear 42, thereby decelerating the sliding door 20 from the position in front of the door leading vertical frame 13 or the door trailing vertical frame 14.

[0039] In addition, when the sliding door 20 is traveling at a reduced speed (the door-front running body 40 is traveling in the first deceleration region R2 or the second deceleration region R3), if the user assists the sliding door 20 in a predetermined direction (for example, to the right), the sliding door 20 will automatically travel in the assisted direction (to the right) at a normal speed (the speed at which the sliding door 20 automatically travels, the speed at which the sliding door 20 travels in the normal region R1 shown in Figure 4).

[0040] Next, a case where a user or the like collides with the sliding door 20 while the sliding door 20 is moving to open or close will be described. For example, if a user or the like collides with the sliding door 20 while the sliding door 20 is automatically moving to the right (when the door edge 21 of the sliding door 20 is traveling in the normal region R1 in FIG. 4 ), the sliding door 20 (the gear 42 of the door edge-side running body 40) will temporarily decelerate or stop. That is, the rotation of the gear 42 of the door edge-side running body 40 will be forcibly decelerated or stopped. By forcibly decelerating or stopping the rotation of the gear 42 of the door edge-side running body 40, the rotation of the rotating shaft of the motor 43 will temporarily decelerate or stop. As a result, the control unit 49 of the motor 43 detects that the rotation of the gear 42 has been forcibly decelerated or stopped, and controls the drive unit 48 to stop the rotation of the motor 43. By stopping the rotation of the motor 43, the rotation of the gear 42 will stop, and the traveling of the sliding door 20 will stop. In this way, when a user or the like collides with the sliding door 20 during opening / closing movement, the control unit 49 of the motor 43 controls the drive unit 48 to stop the rotational drive of the gear 42, thereby stopping the travel of the sliding door 20. Therefore, even if a user or the like collides with the sliding door 20 during opening / closing movement, the user or the like will not be pinched or pushed hard by the sliding door 20. Furthermore, when the rotation of the gear 42 of the door-leading-side running body 40 is forcibly slowed down or stopped, the rotational drive of the gear 42 is stopped to stop the travel of the sliding door 20, so the sliding door 20 can be stopped instantly without applying a load to the motor 43, gear 42, etc. Furthermore, even when the travel of the sliding door 20 has stopped, if the user subsequently moves the sliding door 20 in either the left or right direction, the motor 43 will start the rotational drive of the gear 42 in the direction in which the user moved the sliding door 20.

[0041] Next, a description will be given with reference to the drawings of a door-leading-side runner 40A, which is another embodiment of the door-leading-side runner 40. In the following description, the same components as those of the door-leading-side runner 40 will be denoted by the same reference numerals.

[0042] As shown in Figure 5, the door-leading side running body 40A has a drive side main body 41 attached to the upper end surface of the door leading side of the sliding door 20, a gear 42 that rotates while meshing with the rack 38, a motor 43 that rotates the gear 42, and a driven wheel 44 that is rotatably supported on the drive side main body 41.

[0043] The motor 43 has a drive unit 48 that drives and rotates the gear 42, and a control unit 49 that controls the drive unit 48. The drive unit 48 rotates the rotation shaft of the motor 43 based on a control signal from the control unit 49, and transmits the rotation to the gear 42. The control unit 49 controls the drive unit 48 to control the rotation speed of the gear 42 and the traveling speed of the sliding door 20. The motor 43 is connected via a cable 91 to a power source 90 provided outside the door-leading side traveling body 40.

[0044] Next, the operation of the sliding door 20 and the control of the control unit 49 of the motor 43 in the door-leading side running body 40A will be described. First, the case where the sliding door 20 is automatically closed will be described.

[0045] For example, when a user grips the grip portion 23 of the sliding door 20 and moves the sliding door 20 rightward by a third predetermined distance L3 (see FIG. 1B), the gear 42 of the door-leading side running body 40A is forcibly rotated rightward. Then, the gear 42 is forcibly rotated rightward, causing the rotation shaft of the motor 43 to rotate. The control unit 49 of the motor 43 detects that the gear 42 is being forcibly rotated as the rotation shaft of the motor 43 rotates, and controls the drive unit 48 to start driving the motor 43. When the drive of the motor 43 starts, the drive unit 48 drives the gear 42 to rotate rightward. As a result, the gear 42 rotates while meshing with the rack 38, and the sliding door 20 automatically moves rightward at a predetermined speed.

[0046] When the sliding door 20 starts to travel automatically, the control unit 49 of the motor 43 calculates the travel distance of the door-edge-side runner 40A from the rotation speed of the motor 43 and the outer periphery (outer diameter) of the gear 42. The control unit 49 of the motor 43 also calculates the distance from the door edge 21 of the sliding door 20 to the door-edge vertical frame 13 based on the calculated travel distance of the door-edge-side runner 40A. Specifically, the control unit 49 of the motor 43 calculates the distance from the door edge 21 of the sliding door 20 to the door-edge vertical frame 13 by subtracting the "calculated travel distance of the door-edge-side runner 40A" from the "distance from the entrance 15a of the door pocket 15 to the door-edge vertical frame 13." If, as a result of calculating the distance from the door edge 21 of the sliding door 20 to the door-edge vertical frame 13, the control unit 49 of the motor 43 finds that the calculated distance is equal to or less than a first predetermined distance L1 (see FIG. 1A ), the control unit 49 reduces the rotational drive of the gear 42 by the drive unit 48. As a result, the door-end running body 40A decelerates, and the sliding door 20 decelerates and runs from a point a first predetermined distance L1 before the door-end vertical frame 13. Eventually, the door end 21 of the sliding door 20 abuts against the door-end vertical frame 13, and the sliding door 20 stops in a fully closed state.

[0047] Next, a case where the sliding door 20 is automatically opened will be described. For example, when a user grips the grip portion 23 of the sliding door 20 and moves the sliding door 20 leftward by a fourth predetermined distance L4 (see FIG. 1B), the gear 42 of the door-leading side running body 40A is forcibly rotated leftward. Then, the forced rotation of the gear 42 leftward rotates the rotation shaft of the motor 43. The control unit 49 of the motor 43 detects that the gear 42 is being forcibly rotated as the rotation shaft of the motor 43 rotates, and controls the drive unit 48 to start driving the motor 43. The control unit 49 of the motor 43 detects that the gear 42 is being forcibly rotated as the rotation shaft of the motor 43 rotates, and controls the drive unit 48 to start driving the motor 43. When the drive of the motor 43 starts, the drive unit 48 rotates the gear 42 leftward. As a result, the gear 42 rotates while meshing with the rack 38, and the sliding door 20 automatically moves leftward at a predetermined speed.

[0048] When the sliding door 20 starts to travel automatically, the control unit 49 of the motor 43 calculates the travel distance of the door-leading side runner 40A from the rotation speed of the motor 43 and the outer periphery (outer diameter) of the gear 42. The control unit 49 of the motor 43 also calculates the distance from the door trailing edge 22 of the sliding door 20 to the door trailing edge vertical frame 14 based on the calculated travel distance of the door leading side runner 40A. Specifically, the control unit 49 of the motor 43 calculates the distance from the door trailing edge 22 of the sliding door 20 to the door trailing edge vertical frame 14 by subtracting the "calculated travel distance of the door leading side runner 40A" from the "distance between the door leading edge vertical frame 13 and the door trailing edge vertical frame 14." If, as a result of calculating the distance from the door trailing edge 22 of the sliding door 20 to the door trailing edge vertical frame 14, the control unit 49 of the motor 43 finds that the calculated distance is equal to or less than a predetermined distance, the control unit 49 reduces the rotational drive of the gear 42 by the drive unit 48. Here, the predetermined distance is a distance at which the sliding door 20, which is automatically traveling at a predetermined speed from the door tip 21 side, can stop while decelerating without causing the door tail 22 to collide with the vertical door tail frame 14. As a result, the door tip side traveling body 40A decelerates, and the sliding door 20 travels at a decelerated speed from a point a predetermined distance before the vertical door tail frame 14. Eventually, the door tail 22 of the sliding door 20 abuts against the vertical door tail frame 14, causing the sliding door 20 to fully open and stop.

[0049] In this way, in the door-leading side running body 40A, the control unit 49 of the motor 43 determines that the door leading end 21 or door trailing end 22 of the sliding door 20 has traveled a predetermined distance before the door leading vertical frame 13 or door trailing end vertical frame 14 based on the result (travel distance of the door leading side running body 40A) calculated from the rotation speed of the motor 43 and the outer circumference (outer diameter) of the gear 42, and controls the drive unit 48 of the motor 43 to decelerate the rotation speed of the gear 42, thereby decelerating the sliding door 20 from the position before the door leading vertical frame 13 or door trailing end vertical frame 14.

[0050] As described above, in the sliding door device 10, even if a user or the like collides with the sliding door 20 while the sliding door 20 is automatically opening or closing and the rotation of the gear 42 is forcibly stopped, the motor 43 can instantly stop the rotational drive of the gear 42. Therefore, the sliding door 20 can be instantly stopped without applying a load to the motor 43, gear 42, etc. Furthermore, when a user or the like moves the sliding door 20 in a predetermined direction (left or right direction), the gear 42 is forcibly rotated in the predetermined direction (left or right direction) and the motor 43 instantly drives the gear 42 to rotate, so that the automatic opening or closing of the sliding door 20 can be started with a small force.

[0051] In this embodiment, the driving source of the motor 43 is a power source 90 provided outside the door-end side running body 40, but this is not limited to this, and for example, a mobile battery or solar battery mounted on the door-end side running body 40 may also be used as the driving source of the motor 43.

[0052] Furthermore, in this embodiment, the sliding door 20 is opened and closed by moving the door leading side running body 40 through the meshing of the gear 42 connected to the rotating shaft of the motor 43 with the rack 38 provided on the running part 34 of the rail 30, but this is not limited to this. For example, a rotating body such as a rotating rubber may be connected to the motor 43, and the rotating body may be pressed against the running part 34 of the rail 30 to move the door leading side running body 40.

[0053] Furthermore, in this embodiment, when the sensor 45 provided on the door-leading-side running body 40 detects the door-leading-side metal plate 53 or the door-trailing-side metal plate 54 provided inside the rail 30, the rotational drive of the gear 42 by the motor 43 is reduced. However, this is not limited to this. For example, when a human presence sensor (an invisible sensor or a spot sensor) provided on the top frame 12, the rail 30, or the like detects a user, the rotational drive of the gear 42 by the motor 43 may be reduced. Also, the rotational drive of the gear 42 by the motor 43 may be reduced when the user presses a touch switch provided on the sliding door 20, the door-leading vertical frame 13, the door-trailing vertical frame 14, or the like. Furthermore, a sensor (for example, a thermal-wire type auxiliary sensor) that detects a user or the like at the opening K may be provided inside the rail 30, and the rotational drive of the gear 42 by the motor 43 may be stopped when the sensor detects a user or the like when the sliding door 20 is fully open or when the sliding door 20 is moving open or closed. [Explanation of symbols]

[0054] 10 Sliding door device 11 Frame 12 Top frame 13 Door vertical frame 14 Door end vertical frame 20 Sliding door 30 Rail 42 Gears (rotating bodies) 43 Motor 45 sensors 48 Drive Unit 49 Control Unit 53 Door end metal plate (detection target) 54 Door end metal plate (detection target)

Claims

1. A frame body including at least a top frame, a vertical door end frame, and a vertical door end frame; A sliding door that travels in a predetermined direction along a rail provided on the top frame side between the door front vertical frame and the door rear vertical frame by rotational movement of a rotating body; a motor that rotates and drives the rotating body; Equipped with The motor The rotating body is forcibly rotated in the predetermined direction, thereby driving the rotating body to rotate in the predetermined direction; When the distance between the door tip of the sliding door and the door tip vertical frame or the distance between the door tail of the sliding door and the door tail vertical frame becomes equal to or less than a predetermined distance, the rotational drive of the rotating body is decelerated, The rotation of the rotating body is forcibly stopped, thereby stopping the rotational drive of the rotating body. A sliding door device characterized by the above.

2. The motor a drive unit that drives the rotating body to rotate; a control unit that controls the drive unit; and The control unit reduces the rotational drive of the rotating body by the drive unit when the distance between the door tip of the sliding door and the door tip vertical frame or the distance between the door tail of the sliding door and the door tail vertical frame becomes equal to or less than a predetermined distance. The sliding door device according to claim 1 .

3. A detection object disposed at a position a predetermined distance away from the door leading vertical frame or the door trailing vertical frame; a sensor that detects the object to be detected; Equipped with The motor a drive unit that drives the rotating body to rotate; a control unit that controls the drive unit; and The control unit reduces the rotational driving of the rotating body by the drive unit when the sensor detects the detection object. The sliding door device according to claim 1 .

4. The motor is capable of adjusting the torque for rotating the rotor or the rotation speed of the rotor according to the weight of the sliding door. The sliding door device according to claim 1 .

Images