JP2000297578A - Openable body opening/closing device and motor unit therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a load applied to an obstacle when it is clamped and to prevent erroneous operation due to acceleration applied to an openable body in the closing action disturbing direction. SOLUTION: When a glass door is closed, an ECU computes a relative turning quantity α matching a load applied to the closing glass door from an input side pulse signal P1 corresponding to a rotational speed of an output shaft in a DC motor and an output side pulse signal P2 corresponding to a rotational speed of an output board and computes a speed reduction rate β from the output side pulse signal P2. The ECU determines that the closing glass door clamps an obstacle when the speed reduction rate β is not less than a speed reduction rate determination value β0 set to be a value reduced according to the increase in the relative turning quantity α, and then, the ECU stops the closing action and starts an opening action.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening and closing device such as a power window device used for opening and closing a door glass of a vehicle, and a motor unit for the opening and closing device.

[0002]

2. Description of the Related Art Conventionally, a window opening / closing device used for raising and lowering a door glass in a vehicle is provided with an anti-jamming function for preventing an obstacle from being jammed as the door glass rises (closes). There is something.

The anti-jamming function is to prevent an obstacle from being jammed between the door glass and the window frame when raising (closing) the door glass. It is required to stop the raising operation of the door glass so that the load (sandwich load) applied from the door glass becomes as small as possible.

[0004] As a power window device having such an anti-jamming function, for example, when a door glass during closing operation attempts to jaw an obstacle, an electric motor is actuated by a reaction force received by the door glass from the obstacle. In some cases, the rotation operation of the electric motor is controlled to be inverted based on the fact that the rotation speed of the motor has decreased to a pinch determination value set to a value lower than a predetermined rotation speed. In this power window device, the pinching load applied to the obstacle from the door glass is the magnitude of the reaction force applied to the door glass from the obstacle.

[0005]

However, in the above-described power window device, a load corresponding to the torque of the electric motor is directly applied from the door glass to an obstacle to be sandwiched. Therefore, in order to prevent a large sandwiching load from being applied to an obstacle at the time of sandwiching, it is necessary to set a sandwiching determination value when reversing the rotation operation of the electric motor to a value as close as possible to a predetermined rotation speed.

[0006] On the other hand, the power window device is sometimes operated so as to raise the door glass while the vehicle is running. In this case, if the vehicle gets over the convex portion of the road surface while the door glass is rising, a large load due to a downward acceleration may be applied to the door glass having a large own weight. For this reason, if the entrapment determination value is set to a value close to the predetermined number of revolutions, the ascent of the door glass may stop while the vehicle is in an entrapment state even though the obstacle is not entrapped during traveling. Therefore, in order to prevent such a malfunction, even if the pinching load applied to the obstacle at the time of pinching cannot be sufficiently reduced, the pinching determination value is set to a certain low value so that the malfunction does not easily occur.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to prevent an obstacle to be pinched during closing operation from being pinched without applying a large load. And an opening / closing body opening / closing device capable of surely closing the opening / closing body during the closing operation even if an acceleration in a direction that hinders the closing operation is applied to the opening / closing body, and a motor unit for the opening / closing body opening / closing apparatus. Is to do.

[0008]

Means for Solving the Problems To solve the above problems, the invention according to claim 1 comprises an electric actuator,
An input-side transmission member operatively connected to the electric actuator; an output-side transmission member operatively connected to an opening / closing mechanism for opening / closing an opening / closing body; While transmitting the driving force of the transmission member to the output side transmission member, the input side transmission member performs a buffering operation when a load in a direction that hinders the closing operation of the opening / closing body is applied from the opening / closing mechanism to the output side transmission member. And a buffer member for limiting the driving force transmitted to the output side transmission member to the magnitude of the load, and the input side transmission member is connected to the input side transmission member via the buffer member by operating the electric actuator. An opening / closing body opening / closing device configured to drive the output side transmission member to open / close the opening / closing body,
Buffer state detection means for detecting a buffer state amount corresponding to a buffering degree of the buffer member corresponding to a magnitude of a load acting on the open / close body from the outside in a direction that hinders the closing operation of the open / close body;
When the opening / closing body performs the closing operation, the opening / closing body, the opening / closing mechanism or the operating speed detecting means for detecting the operating speed of the output side transmission member, and the electric actuator operates at a predetermined operating speed, A speed reduction rate of the opening / closing body, the opening / closing mechanism, or the output-side transmission member from a predetermined operating speed due to a load acting on the opening / closing body from the outside in a direction that hinders the closing operation of the opening / closing body is calculated from the operating speed. Speed reduction rate calculating means, when the speed reduction rate is equal to or greater than a speed reduction rate determination value set in advance to a smaller value as the buffer state amount is larger, the opening / closing body during the closing operation is An entrapment determination unit that determines that an obstacle is being inserted, and when it is determined that an obstacle is being inserted,
A closing operation control means for controlling the driving of the electric actuator so as to stop at least the driving control for closing the opening and closing body.

The "buffer state amount" is a detection amount corresponding to the magnitude of a load applied to the opening / closing body from the outside in a direction that hinders the closing operation, and the magnitude of the load or the remaining cushioning operation of the cushioning member. It is for judging the amount. As the “buffer state amount”, for example, the relative displacement amount of the output side transmission member from the normal transmission relation position with respect to the input side transmission member in a state where the buffering member is not performing a buffering operation, There are a reaction force received, a reaction force received by the input side transmission member or the output side transmission member from the buffer member, a load received by the opening / closing mechanism from the opening / closing body, a load received by the opening / closing body from the obstacle, and the like.

According to a second aspect of the present invention, in the operation of the first aspect of the present invention, the buffer state detecting means periodically controls a period according to an operation speed when the input side transmission member operates. An input-side operating speed detection sensor that generates a changing input-side speed signal, and an output-side operating speed that generates an output-side speed signal that periodically changes at a cycle corresponding to the operating speed when the output-side transmission member operates. A relative displacement for calculating, as the buffer state amount, a relative displacement amount of the output-side transmission member with respect to the input-side transmission member from a normal operation relation position with respect to the input-side transmission member, based on the detection sensor, the input-side speed signal, and the output-side speed signal; The operation speed detection means is the output side operation speed detection sensor, the speed reduction rate calculation means, from the periodic change of the output side signal,
A speed reduction rate from a predetermined operation speed of the opening / closing body, the opening / closing mechanism, or the output side transmission member is calculated.

According to a third aspect of the present invention, in the first or second aspect, the electric actuator is an electric rotary motor, and the input-side transmission member and the output-side transmission member are An input-side rotation member and an output-side rotation member, wherein the input-side operation speed detection sensor and the output-side operation speed detection sensor are provided in the input-side rotation member and the output-side rotation member in an annular shape around each rotation axis. The speed signal is generated by detecting a periodic pattern of the detected object.

According to a fourth aspect of the present invention, there is provided an electric rotary motor, an input-side transmission member operatively connected to the electric rotary motor, and an opening and closing mechanism for opening and closing the opening and closing body. An output-side transmission member operatively connected to the output-side transmission member, and a load that transmits a driving force of the input-side transmission member to the output-side transmission member; An opening / closing body having a buffer member that performs a buffering operation when applied to an output side transmission member from a mechanism and limits a driving force transmitted from the input side transmission member to the output side transmission member to the magnitude of the load. In the device motor unit, an input-side operation speed detection sensor that generates an input-side speed signal that periodically changes at a cycle corresponding to an operation speed when the input-side transmission member operates, and the output-side transmission member includes: A closing member opening and closing device for a motor unit and an output-side operating speed detecting sensor for generating a periodically varying output speed signal at a cycle corresponding to the operation speed at which the work.

(Operation) According to the first aspect of the present invention,
When the drive of the electric actuator is controlled at a predetermined operation speed so as to close the opening / closing body, the input-side transmission member is driven to operate at the predetermined operation speed. When the input side transmission member operates, the output side transmission member is driven at a predetermined operation speed via the buffer member. As a result, the opening / closing mechanism is driven at a predetermined operation speed by the output transmission member, and the opening / closing body closes at a predetermined operation speed corresponding to a predetermined operation speed of the electric actuator. When a load in a direction that hinders the closing operation is applied to the opening / closing body that is closing from the outside, the cushioning member performs a buffering operation, and the operating speed of the opening / closing body, the opening / closing mechanism, and the output side transmission member decreases from a predetermined operating speed. I do. At this time, the buffering degree of the buffering member has a magnitude corresponding to the magnitude of the load applied to the opening / closing body. Then, due to the shock-absorbing operation of the shock-absorbing member, the magnitude of the load applied to the load side from the opening / closing body is limited to a load corresponding to the magnitude of the shock-absorbing member, which is smaller than the load corresponding to the driving force of the electric actuator. You. Therefore, when a load is applied to the opening / closing member during the closing operation in a direction that hinders the closing operation from the obstacle, the magnitude of the load applied to the obstacle from the opening / closing member is smaller than the driving force of the electric actuator. It is limited to the size corresponding to the buffer.

When a load acts on the opening / closing body from the outside in a direction that hinders the closing operation of the opening / closing body, a buffer state amount corresponding to the degree of buffering of the buffer member corresponding to the magnitude of the load is detected by the buffer state detecting means. You. Further, when the electric actuator operates at a predetermined operation speed, a speed reduction rate from a predetermined operation speed of the opening / closing body, the opening / closing mechanism or the output side transmission member due to a load acting from the outside is detected by the operation speed detecting means. It is calculated from the operating speed of the opening / closing body, the opening / closing mechanism, or the output side transmission member. Then, the entrapment determining means,
When the calculated speed reduction rate is equal to or greater than a predetermined speed reduction rate determination value such that the larger the buffer state amount becomes, a state where the opening / closing body that performs the closing operation sandwiches an obstacle. It is determined that there is. The closing operation control means drives and controls the electric actuator so as to at least stop the drive control for closing the opening / closing body when it is determined that the opening / closing body to be closed is sandwiching an obstacle.

When the magnitude of the load applied to the opening / closing body during the closing operation based on the sliding resistance or the force continuously applied from the outside in a direction that hinders the closing operation is relatively small, the closing operation is performed. The buffer member has a relatively small buffering degree and a relatively large buffering capacity. The buffering degree is determined based on the buffering state amount, and the speed reduction rate of the opening / closing body, the opening / closing mechanism or the output side transmission member due to the sandwiching of the opening / closing body that closes is set to a relatively large value corresponding to this buffering state. The determination is made based on the determined speed reduction rate.
As a result, when the buffering degree of the buffering member is relatively small, even if an acceleration in a direction that hinders the closing operation acts on the opening / closing body during the closing operation, the opening / closing body, the opening / closing mechanism, or the output side transmission member due to the load based on the acceleration. Is hard to reach the speed reduction rate determination value set to a relatively large value. On the other hand, when the opening / closing body during the closing operation attempts to pinch an obstacle, the speed of the opening / closing mechanism, the opening / closing mechanism or the output side transmission member is reduced so that the closing operation is stopped in a range where the buffer member has a buffering capacity. Easily reaches the speed reduction rate determination value set to a relatively large value. Therefore, when the sliding resistance acting on the opening / closing member during the closing operation is not excessive due to cold or the like, or when a continuous and large force is not applied from the outside in a direction that hinders the closing operation, the closing operation is performed. It is difficult to stop the closing operation even if an acceleration acting in a direction that hinders the closing operation is applied to the opening / closing body, and the closing operation stops with a small load applied to the obstacle at the time of pinching.

On the other hand, when the load applied to the opening / closing body during the closing operation is relatively large based on the sliding resistance or the force continuously applied from the outside in a direction that hinders the closing operation, The buffer member has a relatively large buffering degree and a relatively small buffering capacity. This buffering degree is determined based on the buffering state amount, and the speed reduction rate of the opening / closing body, the opening / closing mechanism or the output side transmission member due to the sandwiching of the opening / closing body that closes is set to a relatively small value corresponding to this buffering state. The determination is made based on the determined speed reduction rate. As a result, when the buffering degree of the buffer member is relatively large, even if an acceleration in a direction that hinders the closing operation is applied to the opening / closing body during the closing operation, the opening / closing body, the opening / closing mechanism, or the output side transmission member due to the load based on the acceleration. Is hard to reach the speed reduction rate determination value set to a relatively small value. On the other hand, when the opening / closing body during the closing operation attempts to pinch an obstacle, the speed of the opening / closing mechanism, the opening / closing mechanism or the output side transmission member is reduced so that the closing operation is stopped in a range where the buffer member has a buffering capacity. Easily reaches the speed reduction rate determination value set to a relatively small value. Therefore, when the sliding resistance acting on the opening / closing body during the closing operation is excessive due to cold or the like, or when a continuous and large force is applied from the outside in a direction that hinders the closing operation, the closing operation is performed during the closing operation. The closing operation is hard to be stopped even if an acceleration acting in a direction that hinders the closing operation acts on the opening / closing body from outside, and the closing operation stops with a small load applied to the obstacle at the time of pinching.

That is, according to the degree of cushioning of the cushioning member during the closing operation, the load applied to the obstacle at the time of being pinched is limited within a range in which the closing operation is not stopped at least by the acceleration in the direction that hinders the closing operation of the opening and closing body during the closing operation. The speed reduction rate of the opening / closing body when the closing operation is stopped is changed so as to be as small as possible.

According to the invention described in claim 2, according to claim 1
In addition to the operation of the invention described in the above, the output state speed signal in which the buffer state amount and the speed reduction rate periodically change in a cycle according to the operation speed of the input side transmission member, and the operation speed of the output side transmission member And the input-side speed signal that periodically changes in a cycle corresponding to Therefore, the speed reduction rate and the buffer state amount are detected only by generating a signal that periodically changes at a cycle corresponding to the operation speed of the input side transmission member and the output side transmission member.

According to the invention of claim 3, according to claim 1,
Alternatively, in addition to the function of the invention described in claim 2, the rotational driving force of the rotary motor is output as the rotational driving force of the output side rotating member. Then, the opening / closing mechanism is operated by the rotational driving force of the output side rotating member, and the opening / closing body is closed. Therefore,
The occupied space is smaller than that of a linear drive type electric actuator.

According to the fourth aspect of the present invention, the input-side and output-side operating speed detecting sensors are integrated into a drive mechanism including a rotary motor, so that the input-side and output-side operating speed detecting sensors are connected to the driving mechanism. There is no need to install it separately.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in a window opening / closing device for opening / closing a door glass of an automobile will be described below with reference to FIGS.

FIG. 2 shows a window opening / closing device. The window opening / closing device includes a motor unit 10, an opening / closing mechanism 11 driven by the motor unit 10 to open / close a door glass G as an opening / closing body, and an E controlling the motor unit 10.
And a CU (electronic control unit) 12.

FIG. 1 shows a state where the motor unit 10 is disassembled. The motor unit 10 includes a motor unit housing (hereinafter, simply referred to as a housing) 13, and an opening on a back surface thereof is closed by a lid (not shown). The housing 13 has a rectangular parallelepiped portion and a semicircular portion provided on one side of the rectangular parallelepiped.

An electric actuator and a DC motor 14 as an electric rotary motor are fixed to the housing 13. The DC motor 14 includes a casing 15 in which an output shaft 14a serving as an input-side transmission member and an input-side rotating member is disposed at the center, and one opening of the casing 15 is
4 is fixed to the upper surface. The brush holding portion and the bearing portion of the DC motor 14 are provided integrally with the housing 13.

An output shaft 14 a of the DC motor 14 and an output shaft 1 are mounted on a cylindrical portion 16 formed inside the housing 13.
A worm gear (not shown) fixed to 4a is accommodated. A worm wheel 18 in which a driving force transmission unit is incorporated is housed in a wheel housing chamber 17 formed in a semicircular portion of the housing 13. Note that the wheel storage chamber 17 is formed by fixing the lid 19 to the housing 13.

A circuit board 21 on which a drive control circuit for rotating the DC motor 12 in a bi-rotational direction at a predetermined constant speed is formed in a substrate accommodating chamber 20 formed inside the rectangular parallelepiped portion of the housing 13. Is housed.

As shown in FIG. 1, the driving force transmitting portion includes a worm wheel 18, a rubber damper 22, a transmitting plate 23, a C-ring spring 24 as a buffer member, an output plate 25 as an output side transmitting member and an output side rotating member. , And output shaft 2
Consists of six.

The worm wheel 18 is rotatably supported by a cylindrical bearing 27 provided in the wheel housing 17. The bearing portion 27 is provided with a shaft hole 28 penetrating the center shaft.

The worm wheel 18 is formed of a synthetic resin into a substantially cylindrical shape with a bottom, and a gear portion 29 meshing with the worm is provided on the outer peripheral surface. Worm wheel 18
A shaft core hole 30 is formed at the center of the shaft hole and extends in the center axis direction through the bottom. An annular concave portion 31 is formed between the shaft core hole 30 and the gear portion 29. The concave portion 31 is provided with three holding portions 32 extending from the outer circumferential surface to the vicinity of the inner circumferential surface at equal angular intervals. Each holding part 32
Thereby, three substantially fan-shaped holding chambers 33 communicating with each other along the inner circumferential surface are formed in the concave portion 31. The rubber damper 22 is accommodated in the recess 31.

The rubber damper 22 has a substantially fan-like shape.
One damper part 34 and a connecting part 35 that connects the damper parts 34 annularly on the inner peripheral side. Each damper section 34 includes
An engagement portion 36 is provided extending from the center in the circumferential direction of the outer peripheral surface to the main portion side. The rubber damper 22 is formed of synthetic rubber, and when the closing operation of the door glass G is mechanically restricted by the collision with the window frame or the reaching of the lower end of the door glass G by the opening operation, the worm gear and the worm wheel 18 are connected. Avoid shocks between them. A transmission plate 23 is engaged with the rubber damper 22.

The transmission plate 23 is formed of a substantially disc-shaped metal plate, and has an engagement piece 37 formed on the lower surface thereof so as to be able to engage with each engagement portion 36 of the rubber damper 22. Also, the transmission plate 23
A first transmitting portion 38 extending radially outward is provided at an outer peripheral end of the first transmitting portion 38. Further, the transmission plate 23 is provided with an insertion hole 39 at the center thereof. A C-ring spring 24 is fitted on the transmission plate 23.

The C-ring spring 24 is a spring member formed in an annular shape with a part cut away, and provided at each end with locking portions 40 and 41 extending radially outward. The C-ring spring 24 is provided to buffer the door glass G from being caught when the door glass G is closed, and has a spring constant of 20 to 40 N / at the time of expansion by elastic deformation.
mm. An output plate 25 is arranged on the C ring spring 24 and the transmission plate 23.

The output plate 25 is formed of a substantially annular metal plate having a diameter larger than that of the transmission plate 23, and a second transmission portion 42 and a regulating portion 43 are provided at spaced positions on the outer peripheral end. I have. The second transmission part 42 and the restriction part 43 are formed in a shape extending radially outward from the outer peripheral end and then extending downward. In the center of the output plate 25, a fitting hole 44 is provided. The housing 1 is provided in the fitting hole 44 of the output plate 25.
The output shaft 26 rotatably supported by the third shaft hole 28 is fitted and fixed through the insertion hole 39 of the transmission plate 23.

The output shaft 26 has a fitting hole 4 at the upper end of the shaft portion 45.
4 is provided with a fitting part 46 that can be fitted to the shaft part 45, and a gear part 47 for drivingly connecting to the opening / closing mechanism 11 is provided at a lower end of the shaft part 45. The worm wheel 18 is housed in the wheel housing chamber 17 while being rotatably supported by the bearing 27, and the gear 29 is meshed with the worm.
As shown in FIG. 3, the rubber damper 22 includes
Are accommodated in the holding chamber 33 in such a manner that they do not rattle in the circumferential direction.
Is housed in The transmission plate 23 is connected to the rubber damper 22 so as to be integrally rotatable by engaging the locking pieces 37 with the engaging portions 36 of the rubber damper 22.

As shown in FIG. 4, the C ring spring 2
Reference numeral 4 is externally fitted to the transmission plate 23 in a state where the left end surface 40a of the locking portion 40 is in contact with the right end surface 38a of the first transmission portion 38. The output plate 25 is disposed on the transmission plate 23 in a state of being rotatably supported by the output shaft 26. In the output plate 25, the left end surface 42 a of the second transmission portion 42 abuts on the right end surface 41 a of the locking portion 41 of the C-ring spring 24, and the right end surface 42 b of the second transmission portion 42 is connected to the first transmission surface of the transmission plate 23. The first engagement portions 40 and 41 of the C-ring spring 24 make contact with the left end surface 38 b of the
The transmission part 38 and the second transmission part 42 are elastically sandwiched.

As shown in FIG. 1, the cover 19 forming the wheel accommodating chamber 17 is provided with an insertion hole 48 through which the upper portion of the output shaft 26 is inserted. An annular concave portion 49 is formed on the upper surface of the lid 19 on the same central axis as the insertion hole 48. An annular rotating body 50 is rotatably fitted in the recess 49. A pair of planetary gears 5 meshing with a gear 51 fixed to the upper end of the output shaft 26 inserted into the insertion hole 48 is provided on an internal tooth 50 a provided on the inner peripheral side of the rotating body 50.
2 are meshed. The rotating body 50, the gear 51, and the two planetary gears 52 are provided to regulate the amount of rotation of the output shaft 26 to a predetermined range.

The housing 13 has a substrate accommodating chamber 20.
A connector 53 for supplying power to the DC motor 14, inputting a command signal from the ECU 12, and the like is provided on the outside.

As shown in FIG. 1, an input-side operating speed detecting means for detecting the presence or absence of a magnet (not shown) provided on the output shaft 14a inside the housing 13 in accordance with the rotation of the output shaft 14a of the DC motor 14. A magnetic sensor 54 as a sensor is provided on the cylindrical portion 16. Magnetic sensor 54
Generates an input-side pulse signal P1 as an input-side speed signal that periodically changes in a cycle corresponding to a rotation speed when the output shaft 14a performs a rotation operation.

A cover 19 is provided inside the housing 13.
Sensor 5 as an output side operation speed detection sensor
5 are provided. On the other hand, on the upper surface of the output plate 25, as shown in FIG. 5, a magnetic pattern 56 is formed as a periodic pattern of a detection object provided in a ring around the rotation axis of the output plate 25 as a central axis. The magnetic sensor 55 is DC
When the output plate 25 rotates by the operation of the motor 14, the presence or absence of the magnetic pattern 56 is detected, and the output-side pulse signal P2 as an output-side speed signal that periodically changes in a cycle corresponding to the rotation speed of the output plate 25 is detected. Generate

Speed reduction rate detecting means, entrapment determining means,
ECU as closing operation control means and relative displacement amount calculation means
Reference numeral 12 includes a microcomputer, an input / output circuit, and the like (not shown). The ECU 12 is connected to a window opening / closing switch 57 which is operated by a driver to open or close the door glass G and outputs a command signal for instructing the opening or closing operation to the ECU 12.
In the present embodiment, the ECU 12 and the magnetic sensor 55 constitute an operation speed detecting means, and the ECU 12 and the magnetic sensor 5
Reference numerals 4 and 55 constitute buffer state detecting means.

The ECU 12 controls the window opening / closing switch 5
7, an input pulse signal P1 output from the magnetic sensor 55, and an output pulse signal P2 output from the magnetic sensor 55, and the opening and closing of the door glass G is controlled based on each signal. Is repeatedly executed at predetermined intervals.

As an opening / closing control process, the ECU 12 drives the DC motor 14 to rotate forward or backward at a predetermined constant rotation speed based on a command signal input from the window opening / closing switch 57, and opens and closes the door glass G at a predetermined operating speed. Make it work.

When the DC motor 14 is driven so as to close the door glass G as an opening / closing control process, the ECU 12 outputs an output to the output shaft 14a from the input side pulse signal P1 and the output side pulse signal P2. The relative rotation amount α as the buffer state amount and the relative displacement amount from the normal rotational position relationship of the plate 25 is calculated.

The ECU 12 performs an opening / closing control process as follows:
When the DC motor 14 is driven so as to close the door glass G, an output plate corresponding to a predetermined operating speed of the DC motor 14 is obtained from a periodic change of the output side pulse signal P2 input from the magnetic sensor 55. The speed reduction rate β from 25 predetermined operation speeds is calculated.

The relative displacement amount α is an elasticity as a buffering state amount corresponding to the degree of buffering of the C ring spring 24 corresponding to the magnitude of the load applied to the door glass G from the outside in a direction that hinders the closing operation of the door glass G. This is a detection amount corresponding to the deformation amount. That is, the output plate 25 is driven via the C-ring spring 14 by the operation of the DC motor 14, and the output plate 2
When the door glass G is closed via the opening / closing mechanism 11 by the rotation of the shutter 5, if a load is applied to the door glass G during the closing operation in a direction that prevents the closing operation, the C ring spring 2 is closed.
The magnitude of the rotational driving force transmitted from the output shaft 14a to the output plate 25 is restricted by the elastic deformation of the output shaft 4. At this time, the rotational driving force transmitted from the output shaft 14a to the output plate 25 is limited by the magnitude of the load applied to the door glass G. That is, the amount of elastic deformation of the C-ring spring 24 is
The size corresponds to the size of the load applied to the door glass G, and the size is opposite to the size of the load that can be limited by the elastic deformation of the C-ring spring 24.

In the opening / closing control process, when the ECU 12 is controlling the drive of the DC motor 14 so as to close the door glass G, the speed reduction rate β increases as the relative rotation amount α increases. When the speed reduction rate determination value β0 which is set in advance to a large value is equal to or more than the predetermined value, it is determined that the door glass G during the closing operation is in a state of pinching an obstacle. The ECU 12 sets the speed reduction rate determination value β0 corresponding to the relative rotation amount α from the stored map.

That is, the speed reduction rate determination value β0 is set to a smaller value as the amount of elastic deformation of the C coil spring 24 during the closing operation of the door glass G is larger. The speed reduction rate determination value β0 is determined based on the elastic deformation state of the C coil spring 24 during the closing operation, and the door glass G due to the load acting on the door glass G during the closing operation in a direction that hinders the closing operation. Is set to a value as small as possible so that the load applied to the obstacle at the time of the pinching is as small as possible within a range where the closing operation is not stopped by the determination based on the speed reduction rate β when the operation speed of the object decreases.

More specifically, when a relatively large load is not applied to the door glass G during the closing operation due to the excessive sliding resistance due to cold or the force continuously applied from the outside, the C-ring is used. The elastic deformation of the spring 24 is relatively small, and the buffer capacity is relatively large. The ECU 12 determines this elastic deformation state based on the relatively small relative rotation amount α, and sets the speed reduction rate β of the output plate 25 due to the pinch of the door glass G that closes to a relatively large value. Is determined based on the speed reduction rate determination value β0. Therefore, the C ring spring 24
When the elastic deformation state of the door plate G is relatively small, the output plate 2 based on the acceleration does not act on the door glass G during the closing operation as the traveling of the vehicle is directed in the direction that hinders the closing operation.
5, the speed reduction rate β from the predetermined rotation speed hardly reaches the speed reduction rate determination value β0 set to a relatively large value. On the other hand, when the door glass G during the closing operation attempts to pinch an obstacle, the speed reduction rate of the output plate 25 is relatively set so that the closing operation is stopped in a range where the C ring spring 24 has a buffer capacity. Speed reduction rate judgment value β set to a large value
Easily reaches zero.

Conversely, for the door glass G during the closing operation,
When a relatively large load is applied based on excessive sliding resistance due to cold or a force continuously applied from the outside, the amount of elastic deformation of the C-ring spring 24 is relatively large and the buffering capacity is relatively small. State. ECU
12, the elastic deformation state is determined based on the relative rotation amount α being relatively large, and the speed reduction rate of the output plate 25 due to the pinching of the closing door glass G is set to a relatively small value. The determination is made based on the speed reduction rate determination value β0. For this reason, when the elastic deformation state of the C-ring spring 24 is relatively large, even if an acceleration in a direction that hinders the closing operation acts on the door glass G during the closing operation as the vehicle travels, the acceleration is based on the acceleration. It is difficult for the speed reduction rate β from the predetermined rotation speed of the output plate 25 to reach the speed reduction rate determination value β0 set to a relatively small value. On the other hand, when the door glass G during the closing operation attempts to pinch an obstacle, the speed reduction rate of the output plate 25 is relatively set so that the closing operation is stopped in a range where the C ring spring 24 has a buffer capacity. The speed reduction rate determination value β0 set to a small value is easily reached.

FIG. 7 shows the change in the load (pinching load) W applied to the obstacle from the door glass G with respect to the relative rotation amount α when the DC motor 14 is operated with the closing operation of the door glass G restricted. It is a graph shown. As can be seen from this graph, when the door glass G during the closing operation sandwiches the obstacle and the reaction force applied to the door glass G from the obstacle increases, first, the relative rotation of the C coil spring 24 is caused mainly by a certain elastic deformation. Load W in the range of momentum α is A
Is raised, the load W applied to the obstacle increases at a relatively low rate of increase in the range of the relative rotation amount α due to the elastic deformation of the C-ring spring 24. Further, when the relative rotation amount α increases until the DC motor 14 rotates and the amount of elastic deformation of the C ring spring 24 becomes maximum, the elastic deformation of the rubber damper 22 causes the relative rotation amount α to fall within the range of C. Is increased at a relatively high rate of increase. The relative rotation amount α during the closing operation of the door glass G is determined by the sliding resistance due to the cold and the force continuously applied from outside to the door glass G.
, It is assumed to be within the range of B. That is, although the C-ring spring 24 is elastically deformed halfway, the load W applied to the obstacle is limited by the elastic deformation of the C-ring spring 24 when trying to pinch an obstacle during this closing operation. You can do it.

FIG. 8 shows a speed reduction rate β when the door glass G in closing operation comes into contact with an obstacle assumed as a rigid body that does not move when the output plate 25 operates at a predetermined rotation speed. 6 is a graph showing characteristics of the time with respect to time. In this graph, the solid line and the two-dot chain line
Shows the characteristics of the motor unit 10 according to the present embodiment in which the rotational driving force is transmitted to the output plate 25 via the C-ring spring 24, and the broken line indicates the conventional rotational transmitting force transmitted only through the rubber damper 22. Are the characteristics of the motor unit. The solid line indicates the case where the value of the relative rotation amount α during the closing operation is indicated by α1 in the graph of FIG. 7, and the two-dot chain line indicates the case where the value of the relative rotation amount α is indicated by α2. As can be seen from the graph, in the motor unit 10 of the present embodiment, the spring constant of the C ring spring 24 is
Since the spring constant is sufficiently lower than 2, the speed reduction rate β of the output plate 25 from the start of pinching has a steep characteristic. Therefore, when judging the entrapment by the door glass G based on the velocity decrease rate β of the output plate 25, the velocity decrease due to the acceleration acting on the door glass G during the closing operation in the direction that hinders the closing operation is caused by the entrapment. While setting it to a value large enough not to be mistaken for
The pinching can be determined at an earlier point in time than in the conventional case where the C-ring spring 24 is not used.

In the present embodiment, the speed reduction rate determination value β0 when the relative rotation amount α during the closing operation is α1 is set to, for example, -30%. Also, the relative rotation amount α during the closing operation
Is, for example, -2.
Set to 0%. In this case, assuming that the speed reduction rate determination value β0 when the relative rotation amount α is α2 is also -30%, C
The entrapment state is determined in a state in which the coil spring 24 is elastically deformed to the maximum, and the point in time when the entrapment is determined is delayed. However, when the relative rotation amount α is α2
Is smaller than the speed reduction rate β which is within the range of the speed reduction of the output plate 25 due to the elastic deformation of the C coil spring 24, according to the elastic deformation state of the C coil spring 24. = -20%, there is no delay in determining the entrapment state.
The speed reduction rate determination value β0 is the magnitude of the acceleration acting on the door glass G in a direction that hinders the closing operation as the vehicle travels, the rotational torque of the DC motor 14, the deceleration to the output shaft 26 or the opening / closing mechanism 11. It is a value that changes depending on the ratio or the like.

As shown in FIG. 2, the opening / closing mechanism 11 is a parallel motion device including a link mechanism. When the output shaft 26 of the motor unit 10 is driven via the C-ring spring 24, the door glass G is opened. When the fixed lift arm bracket 11a moves up and the output shaft is directly driven by the transmission plate 23, the lift arm bracket 11a moves down.

Next, the operation of the window opening / closing device configured as described above will be described with reference to the flowchart shown in FIG. In the opening / closing control process, the ECU 12 first receives a command signal from the window opening / closing switch 57 in step (hereinafter, referred to as S) 10 as a command to open the door glass G, a command to close the door glass G, or does not perform the opening / closing operation. Determine if it is a command. If the ECU 12 determines that the opening / closing operation of the door glass G is not commanded in S10, the ECU 12 does not control the drive of the DC motor 14 for the opening operation or the closing operation in S20, and ends the opening / closing control process.

When the ECU 12 determines that the opening operation has been commanded in S10, the ECU 12 controls the drive of the DC motor 14 to open the door glass G in S30. On the other hand, ECU1
If it is determined in S10 that the closing operation has been commanded, S4
0 so that the door glass G is closed.
Drive control. Next, in S50, the ECU 12 determines whether the input-side pulse signal P1
And the output-side pulse signal P2 input from the magnetic sensor 55
From this, the relative rotation amount α as the relative displacement amount from the normal rotation position relationship of the output plate 25 with respect to the output shaft 14a is calculated. In addition, in S50, the ECU 12 determines the output plate 2 based on the output-side pulse signal P2 input from the magnetic sensor 55.
5 is calculated from the predetermined operation speed.

In S60 executed after S50, E
The CU 12 sets a speed reduction rate determination value β0 corresponding to the calculated relative rotation amount α from the map. Next, the ECU 12
Determines whether the calculated speed reduction rate β is equal to or greater than the set speed reduction rate determination value β0 in S70. ECU
In step S70, the speed reduction rate β is set to the speed reduction rate determination value β0.
If so, S30 is executed, and then the opening / closing control process ends.

On the other hand, when the speed reduction rate β is smaller than the speed reduction rate determination value β0 in S70, the ECU 12 ends the opening / closing control processing. Therefore, when the sliding resistance applied to the door glass G during the closing operation is not excessive due to the cold, or when the force is not continuously applied from the outside in a direction that hinders the closing operation, the vehicle travels. Accordingly, the closing operation is not easily stopped even if an acceleration in a direction that hinders the closing operation is applied to the door glass G during the closing operation, and the closing operation stops with a small load applied to the obstacle at the time of the pinching. On the other hand, when the sliding resistance applied to the door glass G during the closing operation is too cold and excessive, the closing operation is stopped even if an acceleration is applied to the door glass G during the closing operation to prevent the closing operation. It is difficult, and at the time of pinching, the closing operation stops with a small load applied to the obstacle.

According to the present embodiment described in detail above, the following effects can be obtained. (A) The driving force of the output shaft 14a of the DC motor 14 is transmitted to the output plate 25 via a C-ring spring 24 that performs a buffering operation against a load that impedes the closing operation. The sliding resistance due to the cold acting on the door glass G in the direction that hinders the closing operation during the closing operation and the elastic deformation amount of the C coil spring 24 according to the force continuously applied from the outside are determined based on the relative rotation amount α. To determine. Then, when the obstacle is caught during the closing operation, the speed decrease rate β of the output plate 25 becomes equal to or more than the speed decrease rate determination value β0 set to a smaller value as the value of the relative rotation amount α becomes larger. Is determined from

Therefore, in accordance with the amount of elastic deformation of the C coil spring 24 during the closing operation, the closing operation is not stopped by the acceleration acting in the direction that hinders the closing operation on the door glass G during the closing operation. The speed reduction rate β of the door glass G when the closing operation is stopped so that the load applied to the obstacle is as small as possible is changed.
As a result, it is possible to prevent the obstacle to be pinched during the closing operation from being pinched without applying a large load from the door glass G, and to prevent the door glass G during the closing operation from being closed. Even when the acceleration in the direction is applied, the closing operation can be surely performed.

(B) The input side pulse signal P1 having a cycle corresponding to the rotation speed of the output shaft 14a of the DC motor 14 and the output side pulse signal P2 having a cycle corresponding to the rotation speed of the output plate 25
From this, the amount of elastic deformation of the C-ring spring 24 is obtained as the relative rotation amount α, and the speed reduction rate β of the output plate 25 is obtained. Therefore, the output shaft 1 of the DC motor 14
By simply generating the pulse signal 4a and a pulse signal having a cycle corresponding to the rotation speed of the output plate 25, the speed reduction rate β and the relative rotation amount α are detected. As a result, only a pulse signal having a cycle corresponding to the output shaft 14a of the DC motor 14 and the rotation speed of the output plate 25 is required.

(C) DC motor 1 as a rotary motor
The rotation driving force of No. 4 is output as the rotation driving force of the output plate 25. Then, the opening and closing mechanism 11 is operated by the rotational driving force of the output plate 25, and the door glass G is closed. Therefore, the occupied space is smaller than that of the linear drive type electric actuator, so that installation in a narrow space can be easily performed.

(D) The magnetic sensors 54 and 55 are integrated into a drive mechanism including the DC motor 14. Therefore, since it is not necessary to install the magnetic sensors 54 and 55 separately from the drive mechanism, the installation becomes easy.

(E) The output side operation speed detection sensor and the input side operation speed detection sensor are respectively
Since the speed is set to 55, even if each of the magnetic sensors 54 and 55 or the detected portion is contaminated, each rotation operation speed on the output side and the input side can be detected without erroneous detection, and high reliability can be secured.

Hereinafter, embodiments other than the above-described embodiment embodying the present invention will be listed as other examples. In the above embodiment, the input-side speed signal may be the input-side pulse signal P1 that can be generated by detecting the gear unit 29 with a proximity sensor or a photoelectric switch in accordance with the rotation operation of the worm wheel 18.

The output-side speed signal may be an output-side pulse signal P2 that can be generated by detecting a periodic pattern of a detection target provided on the output shaft 26 or the rotating body 50 with a proximity sensor or a photoelectric switch.

The magnetic sensors 54 and 55 may be any of a Hall element, a magnetoresistive element, a pickup coil and the like. Therefore, the input side and output side operation speed signals may be either pulse signals or sine wave signals.

The buffering state amount corresponding to the buffering degree of the buffering member may be a detection amount corresponding to the magnitude of a load externally acting on the opening / closing body in a direction that prevents the closing operation from the outside.
It is not limited to the relative displacement amount α from the normal rotational positional relationship of the output side transmission member with respect to the input side transmission member. In addition, for example, the reaction force that the input side transmission member receives from the cushioning member, the reaction force that the output side transmission member receives from the opening / closing mechanism, the reaction force that the input side transmission member or the output side transmission member receives from the cushioning member, and the opening / closing mechanism is the opening / closing body The load may be a load received from an obstacle, or a load received by an opening / closing body from an obstacle. Each reaction force or load can be detected by a contact pressure sensor (pressure-sensitive conductive rubber) provided between both members. In this case, the amount of buffer state corresponding to the degree of buffering of the buffer member can be directly detected, and processing of the detected amount can be simplified.

The elastic member serving as the cushioning member is not limited to the C-ring spring 24 but may be a compression coil spring or a sponge-like member. The cushioning member is not limited to the elastic member, and an air cylinder formed on one of the input side transmission member and the output side transmission member,
It may be a shock absorber formed by a piston rod provided on the other side.

The present invention may be applied to a window opening / closing device provided with only a cushioning member such as a C-ring spring 24 without providing the rubber damper 22. -The buffer state of the buffer member is divided into a plurality of stages, and a speed reduction rate determination value β0 is set for each stage of the buffer state. Then, the buffer state at that time is determined, and the speed reduction rate β is determined based on the speed reduction rate determination value β0 set for the determined stage of the buffer state. At least the closing operation may be stopped based on the determination result to prevent the entrapment. Even with this configuration, it is possible to prevent entrapment without applying a large load to an obstacle to be entrapped at the time of the closing operation, and acceleration in a direction that hinders the closing operation of the opening / closing body during the closing operation. Even if it is added, the closing operation can be surely performed.

The pinching may be detected based on the speed reduction rate β obtained from the rotation speed of the output shaft 26 instead of the speed reduction rate β obtained from the rotation speed of the output plate 25.

Instead of detecting the entrapment based on the speed reduction rate β obtained from the operation speed of the output side transmission member, the operation speed of the opening / closing mechanism 11 or the speed reduction rate β obtained from the operation speed of the door glass G is used. You may make it detect entrapment based on it.

The present invention is not limited to the window opening / closing device in which the electric actuator is driven at one operating speed, but is applied to a window opening / closing device operable at an operating speed selected from a plurality of operating speeds. In this case, at each operating speed, it is possible to prevent entrapment without applying a large load to the obstacle to be entrapped during the closing operation, and to perform the closing operation on the opening / closing body during the closing operation. Can be reliably closed even if an acceleration in a direction that hinders the operation is applied.

E provided outside the motor unit 10
The CU 12 is not limited to the window opening / closing device that controls the motor, and is provided inside the housing of the motor unit 10.
It is implemented as a window opening / closing device controlled by the CU 12.

The magnetic sensors 54 and 55 may be installed separately from the motor unit 10 without being integrated with the motor unit 10. -The opening and closing mechanism is not limited to the link system, but may be a geared cable system.

The invention is not limited to the electric rotary motor, but may be applied to an opening / closing body opening / closing device driven by a linear motor. The present invention is not limited to the window opening and closing device for opening and closing a door window in a vehicle, and may be applied to each window opening and closing device for opening and closing a quarter window, opening and closing a rear window, opening and closing a tailgate window, or opening and closing a roof window.

The opening / closing body that is opened / closed by the window opening / closing device includes a glass panel, a transparent resin panel, and an opaque panel. -The present invention is not limited to vehicles, and may be applied to window opening / closing devices for railway vehicles, ships, and the like.

In the following, in addition to the inventions described in the claims, technical ideas grasped from the above embodiments and other examples will be described together with their effects. (1) In the invention according to claim 1, the buffer state detecting means includes the input side transmission member and the buffer member, the buffer member and the output side transmission member, the output side transmission member and the opening / closing mechanism, or A contact pressure sensor provided between the opening / closing mechanism and the opening / closing body to detect a load or a reaction force acting between them. According to such a configuration, it is possible to directly detect the buffer state amount corresponding to the buffering degree of the buffer member, and it is possible to simplify the processing of the detected amount.

(2) In the invention according to any one of claims 1 to 4, the cushioning member is an elastic member (C
Ring spring 24). In such a configuration,
The configuration is simplified.

(3) In the invention described in claim 2 or 4, the output side operation speed detection sensor and the input side operation speed detection sensor are each a magnetic sensor. According to such a configuration, even if each magnetic sensor or the detection target is contaminated, each rotation operation speed on the output side and the input side can be detected without erroneous detection, and high reliability can be secured.

[0080]

As described in detail above, according to the first to third aspects of the present invention, a large load is applied from the opening / closing body to an obstacle that the opening / closing body is going to pinch during the closing operation. In this way, the pinch can be prevented from being pinched, and the closing operation can be reliably performed even if an acceleration is applied to the opening / closing body during the closing operation in a direction that hinders the closing operation.

According to the second or third aspect of the present invention, only a signal whose detection amount changes periodically with a cycle corresponding to the operation speed of the input side transmission member and the output side transmission member is sufficient. It is easy to detect the state quantity and the speed reduction rate.

According to the third aspect of the present invention, the space occupied by the electric actuator is reduced, so that the electric actuator can be easily installed in a narrow space. According to the fourth aspect of the present invention, the input-side and output-side operating speed detection sensors do not need to be installed separately from the drive mechanism including the electric rotary motor. Installation of the opening / closing body opening / closing device described in the section is facilitated.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a motor unit constituting a window opening / closing device.

FIG. 2 is a perspective view showing a window opening / closing device.

FIG. 3 is a plan sectional view showing a worm wheel and a rubber tamper.

FIG. 4 is a plan view showing a transmission plate, a C-ring spring, and an output plate.

FIG. 5 is a plan view showing an output plate.

FIG. 6 is a plan view showing a transmission plate, a C-ring spring, and an output plate.

FIG. 7 is a graph showing speed reduction characteristics at the time of pinching due to a closing operation.

FIG. 8 is a graph showing the cushioning characteristics of a C ring spring and a rubber damper.

FIG. 9 is a flowchart of an opening / closing control process.

[Explanation of symbols]

11: an opening / closing mechanism, 12: an ECU as a speed reduction rate calculating means constituting a buffer state detecting means and an operating speed detecting means, a pinching determining means, a closing operation control means and a relative displacement amount calculating means, 14 ... an electric actuator and an electric rotation DC motor as a mold motor, 14a output shaft as input side transmission member and input side rotation member, 24 ... C ring spring as buffer member, 25 ... output plate as output side transmission member and output side rotation member, 54 ... a magnetic sensor as an input-side operation speed detection sensor constituting a buffer state detection means;
55: a magnetic sensor as an output-side operation speed detecting means constituting the speed reduction rate detecting means and the buffer state detecting means;
... magnetic pattern as a periodic pattern of the object to be detected, G ...
Door glass as an opening / closing body, P1... An input side pulse signal as an input side speed signal, P2... An output side pulse signal as an output side speed signal, α... A relative rotation amount as a buffer state amount and a relative displacement amount, β. Speed reduction rate, β0: Speed reduction rate judgment value.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2E052 AA09 BA02 CA06 CA07 DA03 DA07 DA08 DB03 DB07 DB08 EA14 EB01 EC01 GA07 GA08 GA10 GB06 GB18 GC06 GD03 GD09 HA01 KA13 KA14 KA15 LA08 5H571 AA03 BB07 EE06 FF06 GG04 LL09 LL33 PP01

Claims (4)

[Claims] 1. An electric actuator (14), an input-side transmission member (14a) operatively connected to the electric actuator (14), and an opening / closing member for opening / closing an opening / closing body (G). Mechanism (11)
An output-side transmission member (25) operatively connected to the transmission-side member, and a driving force of the input-side transmission member (14a) to the output-side transmission member (25); )
When a load in a direction that hinders the closing operation is applied from the opening / closing mechanism (11) to the output-side transmission member (25), the buffering operation is performed and the input-side transmission member (14a) moves to the output-side transmission member (25). A buffer member (24) for limiting the transmitted driving force to the magnitude of the load, and the electric actuator (14) is actuated,
The input side transmission member (14a) is connected to the buffer member (24).
In the opening / closing body opening / closing device configured to drive the output side transmission member (25) to open and close the opening / closing body (G) via an external device, the opening / closing body (G) is closed from the outside in a direction that hinders the closing operation of the opening / closing body (G). Buffer state detecting means for detecting a buffer state amount (α) corresponding to a buffering degree of the buffer member (24) corresponding to a magnitude of a load acting on the opening / closing body (G); An operating speed detecting means (1) for detecting an operating speed of the opening / closing body (G), the opening / closing mechanism (11) or the output side transmission member (25) at the time of closing operation.
2, 55) and a load acting on the opening / closing body (G) from the outside in a direction that prevents the closing operation of the opening / closing body (G) when the electric actuator (14) operates at a predetermined operating speed. Speed reduction rate (β) from a predetermined operation speed of the opening / closing body (G), the opening / closing mechanism (11) or the output side transmission member (25).
Is calculated from the operating speed.
2) and when the speed reduction rate (β) becomes equal to or greater than a speed reduction rate determination value (β0) set in advance to a smaller value as the buffer state amount (α) becomes larger, the closing operation is performed. Entrapment determining means (12) for judging that the middle opening / closing body (G) is sandwiching an obstacle, and drive control for closing the opening / closing body (G) when it is determined that the opening / closing body (G) is in an entrapment state. Closing operation control means (12) for drivingly controlling the electric actuator (14) so as to at least stop the operation. The buffer state detecting means includes an input-side speed signal (P) that periodically changes in a cycle corresponding to an operation speed when the input-side transmission member (14a) operates.
1) an input-side operating speed detection sensor (54), and an output-side speed signal (P) that periodically changes at a cycle corresponding to the operating speed when the output-side transmission member (25) operates.
2) an output-side operating speed detection sensor (55), the input-side speed signal (P1), and the output-side speed signal (P
2), relative displacement amount calculating means (?) For calculating the relative displacement amount (α) of the output side transmission member (25) from the normal operation relation position with respect to the input side transmission member (14a) as the buffer state amount. The operating speed detecting means is the output-side operating speed detecting sensor (55), and the speed reduction rate calculating means (12).
The opening / closing body (G), the opening / closing mechanism (11) or the output-side transmission member (2)
2. The opening / closing body opening / closing device according to claim 1, wherein a speed reduction rate (β) from a predetermined operation speed is calculated. 3. The electric actuator is an electric rotary motor (14), and the input side transmission member and the output side transmission member (25) are respectively an input side rotation member (14a) and an output side rotation member (25). ), Wherein the input side operation speed detection sensor (54) and the output side operation speed detection sensor (55) are connected to the input side rotation member (14).
The speed signal (P1, P2) is generated by detecting a periodic pattern of an object to be detected which is provided around the rotation axis of each of the a) and the output side rotation member (25). 3. The opening / closing body opening / closing device according to 2. 4. An electric rotary motor (14), an input-side transmission member (14a) operatively connected to the electric rotary motor (14) in an interlocked manner, and an opening / closing member (G) for opening and closing. Opening and closing mechanism (11)
An output-side transmission member (25) operatively connected to the transmission-side member, and a driving force of the input-side transmission member (14a) to the output-side transmission member (25); )
When a load in a direction that hinders the closing operation is applied from the opening / closing mechanism (11) to the output-side transmission member (25), the buffering operation is performed and the input-side transmission member (14a) moves to the output-side transmission member (25). A motor unit for an opening / closing body opening / closing device having a buffer member (24) for limiting the transmitted driving force to the magnitude of the load, the motor unit being adapted to an operation speed when the input side transmission member (14a) operates. An input-side operating speed detection sensor that generates an input-side speed signal that periodically changes with a period; and (54) the input-side operating speed detection sensor that periodically changes with a period corresponding to the operating speed when the output-side transmission member (25) operates. A motor unit for an opening / closing body opening / closing device, comprising: an output side operation speed detection sensor (55) for generating an output side speed signal.