JP7427211B1 - swing door drive unit - Google Patents

Abstract

An object of the present invention is to provide a swing door drive unit that can easily drive a swing door using a linear motor. A hinged door drive unit includes a linear motor and a link member 8. The linear motor is provided on the upper part of the wall section 200 where the hinged door 100 is provided so that the movable element 5 moves linearly along the left and right direction of the wall section 200. One end 9 of the link member 8 is supported on the side of the wall 200 so as to be rotatable around an axis in the vertical direction, and the other end 11 is supported on the side of the hinged door 100 so as to be movable relative to the hinged door 100. The link member 8 has a cam groove 12. A cam pin 15 serving as an engaging portion is fitted into the cam groove 12 . As the movable element 5 moves, the cam pin 15 moves along the cam groove 12. As the cam pin 15 moves, the link member 8 rotates. As the link member 8 rotates, the hinged door 100 is rotated. [Selection diagram] Figure 3

Description

Article 30, Paragraph 2 of the Patent Act applies Published at the 7th High Performance Building Materials and Housing Equipment EXPO Osaka from August 30th to September 1st, 2020

The present invention relates to a swing door drive unit that drives a swing door that rotates around an axis in the vertical direction.

There is a proposal in Patent Document 1 below as a device for driving a hinged door. In the device of Patent Document 1, a linear motor is mounted on a stationary member of a door (hinging door). The rotor plate (movable member) of the linear motor is attached to a frame or chassis attached above the door. A roller pin mounted on the door is engaged with a cam groove provided in the rotor plate. Then, as the rotor plate moves in the left-right direction of the stationary member, the roller pin moves within the cam groove, and the hinged door is rotated along with the movement.

Utility Model Publication No. 46-29

However, with the technology of Patent Document 1, the distance between the rotation axis of the hinged door and the point where the driving force of the linear motor acts on the hinged door (the position of the roller pin) is short, so unless the driving force of the linear motor is increased, the hinged door cannot be opened. Can't open or close.

Therefore, an object of the present invention is to provide a swing door drive unit that can easily drive a swing door using a linear motor.

The hinged door drive unit of the present invention includes:
a linear motor that is attached to an opening member that forms an opening that is opened and closed by a hinged door and that is provided to be movable in a straight line along the left-right direction of the opening, and that drives the movable element;
A link member having a cam groove, one end of which is rotatably supported around a vertical axis on the side of the opening member, and the other end of which is supported movably relative to the hinged door on the side of the hinged door. and,
a support part that is attached to the hinged door and supports the other end of the link member so as to be movable relative to the hinged door;
an engaging part supported by the movable element and engaged with the cam groove,
The engaging portion is moved along the cam groove as the movable element moves linearly, and as the engaging portion moves, the link member is moved relative to the other end and the hinged door. The hinged door is then rotated around the axis, and the hinged door is rotated as the link member is rotated.

According to this, the link member is rotated by the movement of the movable element of the linear motor, and the rotational moment of the link member is applied to the hinged door, thereby rotating the hinged door. This makes it easier to drive the hinged door.

It is a front view of the hinged door provided in the wall and the hinged door drive unit that drives the hinged door. FIG. 2 is an enlarged view of section A in FIG. 1. FIG. FIG. 3 is a view of the hinged door, the hinged door drive unit, and the wall viewed from above, with the hinged door closed. FIG. 3 is a view of the hinged door, the hinged door drive unit, and the wall viewed from above, and shows the hinged door in the middle of opening and closing operations. FIG. 3 is a view of the hinged door, the hinged door drive unit, and the wall viewed from above, with the hinged door open. It is a perspective view of a swinging door, a swinging door drive unit, and a wall part, and is a figure in a state where the swinging door is closed. It is a perspective view of a hinged door, a hinged door drive unit, and a wall part, and is a diagram showing a state in which the hinged door is in the middle of an opening/closing operation. It is a perspective view of a swinging door, a swinging door drive unit, and a wall part, Comprising: It is a figure in the state where the swinging door is open. FIG. 2 is a diagram illustrating the definition of each variable or constant for determining the thrust of the linear motor, and is a diagram of the hinged door drive unit and the hinged door of the embodiment viewed from above. It is a figure which looked at the hinged door drive unit and the hinged door of a comparative example from above. It is a figure which shows the relationship between the movement amount (linear movement amount) of a mover and thrust in an example and a comparative example. It is a figure which shows the relationship between the movement amount (linear movement amount) of a mover, and a thrust force change rate in an example and a comparative example.

Embodiments of the present invention will be described below with reference to the drawings. The hinged door 100 shown in FIG. 1 is rotatably attached to a wall portion 200 as an opening member that partitions a space around a rotation axis L1 directed in the vertical direction. The rotation axis L1 is set near one end 100a of the hinged door 100 in the left-right direction. The hinged door 100 opens and closes an opening 201 (see also FIGS. 3 to 5, 7, and 8) formed by the wall portion 200 by rotating around the rotation axis L1. The hinged door 100 is attached to the wall portion 200 by an attachment portion 202 (see FIG. 7) that defines the rotation axis L1. The attachment portions 202 are attached, for example, to the upper and lower portions of one end 100a of the hinged door 100 in the left-right direction. Further, the hinged door 100 opens toward the back of the page of FIG. Referring to the top views of FIGS. 3 to 5, the hinged door 100 rotates clockwise around the rotational axis L1 position as the center O when opening, and rotates counterclockwise when closing. Note that in FIGS. 3 to 5, a linear motor 2 (mover 5), which will be described later, is located above a link member 8, which will be described later, is illustrated by an imaginary line. Further, the wall portion 200 is illustrated as a cross section cut at a position lower than the link member 8 and the support portion 13.

As shown in FIG. 1, a swing door drive unit 1 (hereinafter sometimes simply referred to as a unit) that automatically rotates a swing door 100 is provided. The unit 1 is retrofitted, for example, to an existing hinged door 100 and wall 200. The unit 1 includes a linear motor 2, as shown in FIG. The linear motor 2 is a device that uses attraction and repulsion of magnets to obtain thrust in a linear direction. Here, as shown in FIG. 3, of both surfaces 200a and 200b of the wall portion 2, the surface 200a facing the opening direction A side of the hinged door 100 is the first surface, and the surface 200b facing the opposite side of the opening direction A. is the second surface. The linear motor 2 is configured to be able to be attached later with screws or the like above the opening 201 on the second surface 200b.

FIG. 2 shows a front view of the linear motor 2, and also shows portions 3 to 7 inside the housing 3 of the linear motor 2 with broken lines. As shown in FIG. 2, the linear motor 2 includes a housing 3, a stator 4, a movable element 5, rollers 6, and rails 7. The housing 3 is formed into a longitudinal shape and accommodates the stator 4, the movable element 5, the rollers 6, and the rails 7. The housing 3 is attached to the wall portion 200 with screws or the like so that its longitudinal direction faces the left-right direction (frontage direction) of the opening 201.

The stator 4 is provided at a position facing the movable element 5 with an interval therebetween, and generates magnetic poles at the position facing the movable element 5. The stator 4 is composed of, for example, a plurality of electromagnets. These electromagnets are arranged within the housing 3 along the longitudinal direction of the housing 3. Note that each electromagnet is composed of a coil, an iron core, etc., and the magnetic pole on the side of the movable element 5 is switched to the N pole or the S pole depending on the direction of the current flowing through the coil. The stator 4 (each electromagnet) is arranged along the left-right direction of the opening 201 with the linear motor 2 attached to the wall 200. The position of the stator 4 is fixed, that is, the stator 4 does not move regardless of the movement of the movable element 5 and the opening/closing operation of the hinged door 100.

The movable element 5 is provided at a position facing the stator 4 with an interval therebetween, and generates a magnetic pole at a position facing the stator 4. The mover 5 is composed of, for example, a plurality of permanent magnets. These permanent magnets are arranged within the housing 3 along the longitudinal direction of the housing 3. The mover 5 (permanent magnet) is configured so that north poles and south poles appear alternately along the longitudinal direction of the housing 3. The movable element 5 is arranged along the left-right direction of the opening 201 with the linear motor 2 attached to the wall 200.

The movable element 5 is provided so as to be linearly movable along the longitudinal direction of the housing 3. In other words, the movable element 5 is provided so as to be linearly movable along the left-right direction of the opening 201 while being attached to the wall portion 200 . Specifically, a roller 6 is attached to the lower surface of the movable element 5, for example. Further, along the longitudinal direction of the housing 3, a rail 7 for guiding the roller 6 is provided.

Based on attraction or repulsion with the stator 4, the mover 5 moves in a first direction in the left-right direction of the opening 201 (specifically, in the right direction in the paper of FIG. 2), or moves in the opposite direction to the first direction. It moves in the second direction (specifically, to the left in the paper of FIG. 2). The first direction is the direction in which the movable element 5 moves when the hinged door 100 is opened. The second direction is the direction in which the movable element 5 moves when the hinged door 100 is closed.

The unit 1 includes a link member 8 driven by a linear motor 2. The link member 8 is provided at a position facing the upper part of the surface 100c of the hinged door 100 on the opposite side in the opening direction A (see FIG. 3). The link member 8 is formed into a longitudinal plate shape. The link member 8 is configured to be retrofittable so as to connect the wall portion 200 and the hinged door 100. Specifically, as shown in FIG. 2, a rotating shaft 9 is attached to one end of the link member 8 in the longitudinal direction. The rotating shaft 9 is provided so that its central axis faces in the vertical direction. The rotation axis 9 is provided at a position different from the rotation axis L1 of the hinged door 100 (see FIG. 1). The rotating shaft 9 is supported by a shaft support section 10 . The shaft support part 10 is supported by the housing 3 of the linear motor 2. The link member 8 is rotatably provided around the axis of the rotating shaft 9. In this way, one end of the link member 8 is supported by the wall portion 200 via the rotating shaft 9, the shaft support portion 10, and the casing 3.

A pin 11 is attached to the other end of the link member 8 in the longitudinal direction (the end opposite to the rotation shaft 9). The pin 11 is provided so that its central axis faces in the vertical direction. The pin 11 is provided rotatably around its own central axis. The pin 11 and the end of the link member 8 to which it is attached are supported on the side of the hinged door 100 and are provided so as to be movable relative to the hinged door 100.

Specifically, the unit 1 includes a support portion 13 that supports the pin 11. The support portion 13 is configured to be attachable to the hinged door 100 afterward. The support part 13 is attached to the upper part of the surface 100c of the hinged door 100 on the opposite side in the opening direction A (see FIG. 3) with screws or the like. In FIG. 3, among both ends 100a and 100b in the left-right direction of the hinged door 100, the end 100a on the side of the rotation center O (rotation axis L1 (see FIG. 1)) of the hinged door 100 is defined as the base end of the hinged door 100, and the opposite side Let the end portion 100b be the tip of the hinged door 100. The support portion 13 is attached to a position closer to the distal end 100b than the base end 100a in the left-right direction of the hinged door 100.

As shown in FIGS. 3 to 5, a longitudinal guide groove 14 is formed in the support portion 13. As shown in FIGS. The guide groove 14 is formed to vertically penetrate the support portion 13 . The guide groove 14 extends parallel to the left-right direction of the hinged door 100 when the support portion 13 is attached to the hinged door 100.

The pin 11 is fitted into the guide groove 14 and is provided so as to be movable along the guide groove 14. The pin 11 is provided so that it cannot move relative to the hinged door 100 in any direction other than the direction along the guide groove 14. In this way, the pin 11 and the end of the link member 8 to which it is attached are provided so as to be slidable in the left-right direction of the hinged door 100 along the surface 100c of the hinged door 100 relative to the hinged door 100.

Below, the rotating shaft 9 may be referred to as the base end of the link member 8. Further, the pin 11 may be referred to as the tip of the link member 8 in some cases. The positions of the proximal end 9 and the distal end 11 of the link member 8 will be explained in more detail. As shown in FIG. 3, when the hinged door 100 is closed, the base end 9 is located at a position closer to the base end 100a than the tip 100b of the hinged door 100 in the left-right direction B of the wall portion 200 or the left-right direction C of the hinged door 100. provided. As shown in FIGS. 3 to 5, the base end 9 is provided at a position closer to the center of the opening 201 in the left-right direction B (left side in the paper plane of FIGS. 3 to 5) than the rotation center O of the hinged door 100. It will be done. Further, the base end 9 is provided at a position farther from the surface 100c than the tip 11 in the normal direction D to the surface 100c of the hinged door 100 when the hinged door 100 is closed (the state shown in FIG. 3). That is, when the hinged door 100 is closed, the distance between the surface 100c and the base end 9 is greater than the distance between the surface 100c and the tip 11.

Further, when the imaginary line L2 connecting the base end 9 and the distal end 11 is taken as the longitudinal direction line of the link member 8, the longitudinal direction line L2 is the surface of the hinged door 100 when the hinged door 100 is closed (the state shown in FIG. 3). It extends in a direction at an angle to 100c. The longitudinal direction line L2 is located approximately parallel to the surface 100c when the hinged door 100 is fully opened (the state shown in FIG. 5). In other words, the angle between the longitudinal direction line L2 and the surface 100c when the hinged door 100 is fully open is smaller than the angle when the hinged door 100 is closed.

The tip 11 of the link member 8 is arranged near the tip 100b of the hinged door 100 when the hinged door 100 is closed (the state shown in FIG. 3). Even when the hinged door 100 is fully open (the state shown in FIG. 5), the tip 11 is arranged at a position closer to the tip 100b than the base end 100a of the hinged door 100 in the left-right direction C of the hinged door 100. Further, the tip 11 may be located at one end 14a of the guide groove 14 when the hinged door 100 is closed, as shown in FIG. The tip 11 may be located at the other end 14b of the guide groove 14 when the hinged door 100 is fully open, as shown in FIG.

The distance between the distal end 11 and the proximal end 9 is, for example, greater than 0.5 times the horizontal width of the hinged door 100, preferably greater than 0.7 times. According to this, the rotational moment exerted on the hinged door 100 from the link member 8 can be increased. Further, the distance between the distal end 11 and the proximal end 9 may be smaller than the left-right width of the hinged door 100, for example. According to this, the link member 8 can be prevented from becoming too large, and the unit 1 can be downsized.

As shown in FIGS. 3 to 5, the link member 8 has a cam groove 12. As shown in FIGS. The cam groove 12 is a groove for converting the thrust of the linear motor 2 in the linear direction into rotational motion around the rotation shaft 9. The cam groove 12 is formed to penetrate between the upper surface and the lower surface of the link member 8. The cam groove 12 is formed in a longitudinal shape along the longitudinal direction of the link member 8. The cam groove 12 is formed so as to extend in the horizontal direction (direction perpendicular to the vertical direction) while the link member 8 is supported by the wall portion 200 and the hinged door 100.

The first end 12 a of the cam groove 12 in the longitudinal direction may be provided at a position closer to the base end 9 than the distal end 11 of the link member 8 . The second end 12b of the cam groove 12 in the longitudinal direction may be provided at a position closer to the distal end 11 than the base end 9. The distance between the first end 12a and the base end 9 may be smaller than the distance between the second end 12b and the tip 11. Further, the distance between the distal end 11 and the first end 12a may be smaller than the distance between the distal end 11 and the proximal end 9. The distance between the proximal end 9 and the second end 12b may be smaller than the distance between the proximal end 9 and the distal end 11. The length in the longitudinal direction of the cam groove 12 is shorter than the distance between the tip 11 and the base end 9 of the link member 8, longer than the distance between the base end 9 and the first end 12a, and the length between the tip 11 and the second end. The distance may be longer than the distance to the portion 12b.

The area within the upper surface of the link member 8 is divided into a first area on the side closer to the surface 100c of the hinged door 100 and a second area on the opposite side with the longitudinal direction line L2 as a boundary. In this case, the first end portion 12a may be provided in the second region, for example. The second end portion 12b may be provided on the longitudinal direction line L2 or near the longitudinal direction line L2. Most of the cam groove 12 may be located in the second region.

The cam groove 12 extends in a curved shape. Specifically, the cam groove 12 is comprised only of curved parts in the entire section from the first end 12a to the second end 12b, and does not include any straight parts. Further, the cam groove 12 is formed in an arc shape with a constant curvature. That is, the curvature of the cam groove 12 does not change from the first end 12a to the second end 12b. Here, among the edges extending in the longitudinal direction of the link member 8, the edge 8a (see FIG. 4) on the side far from the hinged door 100 is defined as a distal edge. The cam groove 12 is formed in an arcuate shape that bulges toward the distal edge 8a side with respect to an imaginary straight line (not shown) connecting the first end 12a and the second end 12b. Further, the cam groove 12 is formed so that the distance from the longitudinal direction line L2 gradually changes from the first end 12a toward the second end 12b. More specifically, in this embodiment, the distance between the first end 12a and the longitudinal line L2 is greater than the distance between the second end 12b and the longitudinal line L2. The distance between the cam groove 12 and the longitudinal line L2 gradually decreases as it approaches the second end 12b, for example.

The cam grooves 12 are arranged so that the angle φ (see FIG. 4) between the moving direction of the mover 5 and the extending direction of the cam grooves 12 becomes larger as the distance between the cam pin 15 and the rotating shaft 9, which will be described later, is smaller. The shape is determined. More specifically, the angle φ when the cam pin 15 is located near the first end 12a of the cam groove 12 (as shown in FIG. 5) is greater than when the cam pin 15 is located near the second end 12b (as shown in FIG. 3). ) is larger than the angle φ. When the cam pin 15 is located near the first end 12a of the cam groove 12 (as shown in FIG. 5), the angle φ is set to approximately 90°. The angle φ gradually increases as the hinged door 100 opens. Further, the distance between the cam pin 15 and the rotating shaft 9 gradually becomes smaller as the hinged door 100 opens.

Note that the cam groove 12 may have a shape other than the shape shown in FIGS. 3 to 5. Specifically, the portion of the cam groove 12 near the ends 12a and 12b is defined as the near-end portion, and the portion other than the near-end portion is defined as the intermediate portion. In this case, for example, the middle part of the cam groove 12 may have a circular arc shape with a constant curvature, and the near end part may have a curved part or a straight part with a shape or curvature different from that of the middle part. Further, the cam groove 12 may be composed of a plurality of curved parts having different curvatures, or may be composed of a plurality of straight parts having different inclinations. Further, the cam groove 12 may have a shape including both a curved portion and a straight portion.

The unit 1 includes a cam pin 15 (see FIGS. 2 to 8) as an engaging portion that engages with the cam groove 12. The cam pin 15 is fitted into the cam groove 12. The cam pin 15 is provided rotatably around an axis in the vertical direction. As shown in FIG. 2, the cam pin 15 is supported by a support portion 16. As shown in FIGS. 3 and 6, the support portion 16 includes a first portion 16a extending in the vertical direction and a second portion 16b bent at right angles from the lower end of the first portion 16a and extending in the horizontal direction. . The first portion 16a is located outside the opening 201 in a direction perpendicular to the surfaces 200a, 200b of the wall 200. The second portion 16b is provided so as to enter from the outside to the inside of the opening 201 in a direction perpendicular to the surfaces 200a and 200b of the wall portion 200. The first portion 16a is supported by the movable element 5 of the linear motor 2. Cam pin 15 is attached to second portion 16b. The support portion 16 and the cam pin 15 supported by the support portion 16 move linearly along the left-right direction of the opening 201 as the movable element 5 moves.

As shown in FIG. 3, the cam pin 15 is provided at a position close to the second end 12b of the cam groove 12 when the hinged door 100 is closed. The cam pin 15 is provided at a position closer to the tip 11 than the base end 9 of the link member 8 when the hinged door 100 is closed. Further, as shown in FIG. 5, the cam pin 15 is provided at a position close to the first end 12a of the cam groove 12 when the hinged door 100 is fully open. The cam pin 15 is provided at a position closer to the base end 9 than the tip 11 of the link member 8 when the hinged door 100 is fully open.

The unit 1 includes a control section 17 (see FIG. 2) that controls the magnetic poles and magnetic force of the stator 4 of the linear motor 2. When the swing door 100 is opened, the control unit 17 controls the magnetic poles of the stator 4 so that the movable element 5 moves in the first direction (specifically, to the right in the paper of FIG. 2). When closing the hinged door 100, the control unit 17 controls the magnetic poles of the stator 4 so that the mover 5 moves in a second direction opposite to the first direction (specifically, to the left in the paper of FIG. 2). control. Further, the control unit 17 controls the magnetic force of the stator 4 by controlling the current supplied to the stator 4, and in turn controls the propulsive force of the movable element 5. The control unit 17 may be provided within the casing 3 of the linear motor 2 or may be provided outside the casing 3.

Further, the unit 1 includes a detection section 18 that detects the timing of operation of the hinged door 100. The detection unit 18 may be, for example, a human sensor such as a camera or an infrared sensor that detects a person approaching the hinged door 100. Alternatively, the detection unit 18 may include an opening/closing switch (operation unit) that outputs a signal instructing the opening or closing operation of the hinged door 100. In this case, the detection unit 18 outputs a signal (a signal instructing an opening operation or a signal instructing a closing operation) based on the operation of the opening/closing switch to the control unit 17. The opening/closing switch may be configured as a wireless unit (remote controller) that wirelessly transmits a signal instructing the opening or closing operation to the control unit 17, or may be connected to the control unit 17 by wire.

The operation of unit 1 will be explained below. When the control unit 17 determines based on the detection unit 18 that the conditions for performing the opening operation are satisfied, the control unit 17 controls the current to the stator 4 to move the movable element 5 from the state shown in FIG. 3 to the right. The control unit 17 may determine that there is a person approaching the hinged door 100 or may determine that a signal instructing the opening operation is received as the fulfillment of the execution condition for the opening operation. As shown in FIG. 3→FIG. 4→FIG. 5, as the mover 5 moves rightward, the cam pin 15 moves along the cam groove 12 in a direction approaching the first end 12a of the cam groove 12. do. As the cam pin 15 moves, the link member 8 moves the tip 11 along the guide groove 14 in a direction approaching the base end 100a of the hinged door 100, and rotates clockwise on the paper surface of FIG. Rotate in the direction. As the link member 8 rotates, the hinged door 100 rotates around the rotation center O in a clockwise direction on the paper surface of FIG. When the hinged door 100 is fully open (the state shown in FIG. 5), the control unit 17 stops energizing the stator 4 and stops the movable element 5. With the above, the hinged door 100 opens automatically.

When the control unit 17 determines based on the detection unit 18 that the conditions for executing the closing operation are satisfied, the control unit 17 controls the current to the stator 4 to move the movable element 5 leftward from the state shown in FIG. Note that the control unit 17 may determine that there is no one around the opening 201 as the fulfillment of the execution condition for the closing operation, or may determine that a signal instructing the closing operation has been received. , it may be determined that a predetermined time has elapsed since the hinged door 100 was opened. As shown in FIG. 5→FIG. 4→FIG. 3, as the mover 5 moves to the left, the cam pin 15 moves along the cam groove 12 in a direction approaching the second end 12b of the cam groove 12. do. As the cam pin 15 moves, the link member 8 moves the tip 11 along the guide groove 14 in a direction approaching the tip 100b of the hinged door 100, and rotates counterclockwise in the paper plane of FIG. Rotate in the direction. As the link member 8 rotates, the hinged door 100 rotates about the rotation center O in a counterclockwise direction on the paper surface of FIG. When the hinged door 100 is in the completely closed state (the state shown in FIG. 3), the control unit 17 stops energizing the stator 4 and stops the movable element 5. With the above, the hinged door 100 closes automatically.

The effects of this embodiment will be explained below. In this embodiment, since the hinged door 100 is opened and closed by the linear motor 2, it is possible to achieve higher quietness and smoother opening and closing compared to the case where the door is opened and closed by a rotary motor. Furthermore, since the rotational moment of the link member 8 is applied to the hinged door 100, the hinged door 100 can be rotated without excessively increasing the driving force (propulsive force) of the linear motor 2. In particular, the tip 11 of the link member 8 is provided at a position closer to the tip 100b than the base end 100a of the hinged door 100, and the distance between the tip 11 of the link member 8 and the base end 9 is 0.5 of the horizontal width of the hinged door 100. Since it is larger than twice as much, the rotational moment applied from the link member 8 to the hinged door 100 can be increased, and in turn, the driving force of the linear motor 2 can be reduced. By being able to reduce the driving force of the linear motor 2, it is possible to suppress the linear motor 2 from increasing in size.

Further, since the cam groove 12 is formed in a shape including a curved portion, the rotational torque of the hinged door 100 or the thrust of the movable element 5 can be easily controlled by adjusting the position, curvature, etc. of the curved portion. Further, since the cam groove 12 is formed in a curved shape (arc shape) with a constant curvature over the entire section, the cam groove 12 can be easily formed. Furthermore, as shown in the embodiments described later, when the thrust of the movable element 5 is controlled so that the rotational torque of the hinged door 100 is constant, the variation in the rate of change of the thrust with respect to the amount of movement of the movable element 5 can be reduced.

The following verification was conducted regarding the relationship between the shape of the cam groove and the thrust of the linear motor. FIG. 9 shows a plan view of a swing door drive unit in an embodiment of the invention. The structure of the swing door drive unit in FIG. 9 is the same as the structure shown in FIGS. 1 to 8, and each part in the structure in FIG. 9 is given the same reference numeral as each part in the structure in FIGS. 1 to 8. There is. The thrust force F of the movable element 5 is adjusted so that the rotational torque t (hereinafter sometimes referred to as door torque) of the hinged door 100 is constant (specifically, t=2N·m) regardless of the amount of movement of the movable element 5. The relationship between the movement amount of the movable element 5 and the thrust force F was determined when controlling the movable element 5. Specifically, the thrust force F with respect to the moving amount (position) of the movable element 5 was determined based on the following equation 1.
t={(FLsinθ)/s}・cosμ・l (Formula 1)

In FIG. 9, variables or constants used in Equation 1 are shown. Specifically, t is a torque (door torque) that acts on the rotation axis O of the hinged door 100 (hereinafter sometimes referred to as the door rotation axis). l is the distance between the tip 11 of the link member 8 and the door rotation axis O. F is the thrust of the mover 5. L is the distance between the cam pin 15 and the rotation shaft 9 of the link member 8. θ extends from the virtual straight line connecting the rotating shaft 9 and the cam pin 15 to the end 201a (left side in FIG. 9) of the opening 201 opposite to where the door rotating axis O is located in the left-right direction. This is the angle formed by the imaginary straight line. μ is an angle formed by an imaginary straight line connecting the tip 11 of the link member 8 and the rotation axis 9 and an imaginary straight line connecting the tip 11 and the door rotation axis O. s is the distance between the tip 11 and the rotating shaft 9.

The distance s is a constant value regardless of the position of the movable element 5, and specifically, s=61.81 mm. The angles θ and μ and the distances l and L change depending on the position of the movable element 5 as shown in Table 1 below. Table 1 shows the thrust force F with respect to the position of the mover 5 when the door torque t=2N·m. In Table 1, the linear movement amount indicates the movement amount of the movable element 5 from a predetermined origin in the left-right direction of the opening 201. The linear movement amount=0 mm indicates the position of the movable element 5 where the hinged door 100 is fully closed. The linear movement amount=380 mm indicates the position of the movable element 5 where the hinged door 100 is fully opened. Note that Table 1 also shows the door opening/closing angle, which is the opening/closing angle of the hinged door 100.

As shown in Table 1, the angle θ gradually increases as the amount of linear movement increases. Moreover, the distance L gradually becomes smaller as the amount of linear movement becomes larger. The angle μ gradually increases as the amount of linear movement increases, and conversely becomes gradually smaller from the middle (after the amount of linear movement exceeds 330 mm). The distance l gradually becomes smaller as the amount of linear movement increases. The thrust force F gradually increases as the amount of linear movement increases. The minimum value of the thrust force F is approximately 28N, and the maximum value is approximately 46N. The ratio of the maximum value to the minimum value of the thrust force F (=maximum value/minimum value) is approximately 1.6. In this way, when controlling the thrust force F so that the door torque t is constant, the structure of the swing door drive unit 1 (the link member 8 shape, the shape of the cam groove 12, the position of the rotating shaft 9 of the link member 8, etc.) can be said to be determined.

In addition, as a comparative example, the thrust force with respect to the position of the mover in the case of using the structure shown in FIG. 10 was also determined. In the structure of FIG. 10, members similar to those in FIG. 9 are given the same reference numerals. The structure in FIG. 10 differs from the structure in FIG. 9 in that the cam groove 12' of the link member 8 is formed in a straight line, but otherwise is the same as the structure in FIG. The positions of both ends of the cam groove 12' in the link member 8 are similar to the positions of both ends of the cam groove 12 in FIG.

Table 2 and FIG. 11 show the relationship between the movement amount (linear movement amount) of the mover 5 and the thrust force F in the example and the comparative example. FIG. 11 also shows an ideal line of thrust F.

In order to easily control the movable element 5, the rate of change of the thrust force F with respect to the amount of movement of the movable element 5 (hereinafter sometimes referred to as the thrust rate of change) must be constant, as shown by the ideal line in FIG. The ideal is. In FIG. 11, the line showing the change in thrust force F in the example is closer to the ideal line than the line showing the change in thrust force F in the comparative example.

Furthermore, Table 3 and FIG. 12 show the relationship between the movement amount (linear movement amount) of the mover 5 and the thrust change rate in the example and the comparative example. Further, Table 4 shows the maximum value, minimum value, and difference (=maximum value - minimum value) of the thrust change rate in the example and the comparative example.

As shown in Table 3 and FIG. 12, in both the example and the comparative example, the thrust force change rate gradually increases as the linear movement amount increases. On the other hand, the variation in the thrust change rate with respect to the linear movement amount is smaller in the example than in the comparative example. Specifically, as shown in Table 4, the difference between the maximum value and the minimum value of the thrust change rate in the example was smaller than that in the comparative example, and was 87.2% of the difference in the comparative example. Ta. From this, it can be said that the thrust force change rate of the example is closer to the ideal line in FIG. 11 than that of the comparative example.

Further, the ratio of the maximum value to the minimum value of the thrust change rate (=maximum value/minimum value) in the comparative example is about 33. On the other hand, the ratio of the maximum value to the minimum value of the rate of thrust change in the example (=maximum value/minimum value) was about 17, which was about 50% of that of the comparative example.

In this way, in the embodiment, when the thrust force F is controlled so that the door torque t is constant, the difference between the maximum value and the minimum value of the thrust change rate is 0.2 N/mm or less (more specifically, The structure of the hinged door drive unit 1 (the shape of the link member 8, the shape of the cam groove 12) is adjusted such that the ratio of the maximum value to the minimum value of the thrust change rate is 20 or less. It can be said that the shape, position of the rotation axis 9 of the link member 8, etc.) are determined.

Note that the cam groove (linear cam groove) of the comparative example has advantages such as a simple shape, so the linear cam groove is not excluded from the scope of the present invention.

1 Swing door drive unit 2 Linear motor 4 Stator 5 Mover 8 Link member 12 Cam groove 13 Support part 15 Cam pin (engaging part)
100 Swinging door 200 Wall (opening member)
201 Opening

Claims (2)

a linear motor that is attached to an opening member that forms an opening that is opened and closed by a hinged door and that is provided to be movable in a straight line along the left-right direction of the opening, and that drives the movable element;
A link member having a cam groove, one end of which is rotatably supported around a vertical axis on the side of the opening member, and the other end of which is supported movably relative to the hinged door on the side of the hinged door. and,
a support part that is attached to the hinged door and supports the other end of the link member so as to be movable relative to the hinged door;
an engaging part supported by the movable element and engaged with the cam groove,
The engaging portion is moved along the cam groove as the movable element moves linearly, and as the engaging portion moves, the link member is moved relative to the other end and the hinged door. and rotating the hinged door around the axis while rotating the link member, and rotating the hinged door as the link member rotates.
Swinging door drive unit. The swing door drive unit according to claim 1, wherein the cam groove is formed in a shape including a curved portion.

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