JPH04238987A - Slide door for car - Google Patents

Abstract

PURPOSE:To make compact a slide door by providing an ultrasonic motor consisting of a vibrator fixing an elastic body to a piezo-electric element and a moving body welded to the elastic body with pressure or released from pressure welding thereto between the slide door and a car. CONSTITUTION:Under a normal working condition, both automatic and manual change-over switches are set to an automatic side, and a pressure-welding mechanism X is in a state of pressure-welding. When no make and break switch is not operated, an elastic body 11 of ultrasonic motor Y and a moving body 15 are integrated, and a slide door 1 is held in a current opening and shutting position. When at least one of the make and switches is operated in an off- direction, a moving wave of a vibrator 10 is moved in an on-direction side, and the door 1 is operated to open. In addition, when the door 1 is manually operated to open and shut, in the case either the automatic change-over switch or the manual one is switched to the manual side, the pressure-welding mechanism X is operated in the direction of the release from the pressure-welding, and the elastic body 11 is separated from the moving body 15.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliding door for a vehicle.

0002

[Prior Art] Conventionally, in so-called van-type vehicles, a sliding door that can be slid in the longitudinal direction of the vehicle body is attached to an opening formed on the side of the vehicle body, and the opening is opened and closed by the sliding door. It is known what made it so. As a method for driving such a sliding door, for example, Japanese Patent Application Laid-Open No. 1987-199722
As disclosed in the above publication, it was common to connect a motor fixedly placed on the vehicle body side to the sliding door via a power transmission means such as a belt or chain, and drive the sliding door by the rotational force of the motor. .

0003

[Problems to be Solved by the Invention] However, in the case where the rotational force of the motor is directly transmitted to the sliding door side to cause it to slide, the motor is relatively large and a transmission means such as a belt is required. Because it is necessary,
There is a problem in that the device becomes large in size in order to secure the space for storing these devices.

[0004] In addition, this sliding door needs to be able to be opened and closed manually as needed in an emergency, but in the case of a conventional motor-driven sliding door, it is necessary to turn on electricity to the motor. Even when the motor is shut off, the motor and the sliding door remain connected via the transmission means, so when a person manually opens and closes the sliding door, this creates resistance and requires a relatively large operating force. However, there was room for improvement in terms of ensuring easy operability during manual operation.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a sliding door for a vehicle in which the sliding door driving section can be made more compact and the operability can be improved.

[0006]

[Means for Solving the Problems] In the present invention, as a specific means for solving the problems, the above-mentioned device is mounted so as to be slidable in the longitudinal direction of the vehicle body with respect to an opening formed in the side portion of the vehicle body, and by its sliding action, the above-mentioned In a vehicle sliding door whose opening can be opened and closed, distorted vibrations of a predetermined frequency are generated by applying alternating current voltages to both ends of the door between the sliding door and the vehicle body, and the phase of each alternating voltage is changed. A plurality of piezoelectric elements that can move or stop the waveform of the strain vibration by control are arranged in a row in the longitudinal direction of the vehicle body, and a surface of each piezoelectric element is arranged to follow the strain vibration of each piezoelectric element. a vibrating body formed by closely fixing an elastic body that generates a moving wave on its surface; and a vibrating body that is placed on the sliding door side and that is crimped or released from the crimping mechanism with respect to the elastic body of the vibrating body. In addition to installing an ultrasonic motor consisting of a moving body,
a first switch that allows the moving direction of the moving wave of the vibrating body to be selectively set to the front side or the rear side of the vehicle body; and in the first setting position, the crimping mechanism performs a crimping action; The device is also characterized in that it includes a second switch that releases the crimping action of the crimping mechanism in the second setting position.

[0007]

[Operation] In the vehicle sliding door of the present invention, when the second switch is set to the first setting position,
The crimping mechanism is operated and the elastic body of the ultrasonic motor and the movable body are crimped. Therefore, in this state, by appropriately operating the first switch to cause the vibrating body of the ultrasonic motor to generate a moving wave on the surface of the elastic body that moves toward the front side of the vehicle body or the rear side of the vehicle body, the movable body is caused to move along the traveling direction of the moving wave of the elastic body due to the frictional force acting between it and the elastic body, and as a result, the sliding door connected to the moving body is opened and closed.

Furthermore, when the second switch is set at the first setting position and the first switch is not operated at all, the movable body moves toward the elastic body due to the frictional force between it and the elastic body. The sliding door is held in that position.

On the other hand, when the second switch is set to its second setting position, the crimping action of the crimping mechanism is released (that is, the elastic body and the movable body are in a separated state).
Therefore, the sliding door becomes free with respect to the vehicle body. Therefore, in this state, even if the first switch is operated, the sliding door cannot be slid, and the sliding door can only be opened and closed manually.

0010

Therefore, according to the sliding door for a vehicle of the present invention, since a compact ultrasonic motor is adopted as the driving means of the sliding door, for example, the driving means has a rotating magnetic field as in the conventional case. Compared to using a motor, the device can be made more compact, and
Since the wiring is placed on the vehicle body side and only on the vibrating body side, wiring work can be simplified and reliability can be improved.

Furthermore, when the second switch is set to the second setting position, the crimping action by the crimping mechanism is released and the sliding door and the vehicle body are completely separated, so that the sliding door drive section There is no operational resistance when the sliding door is manually operated, and the manual operation of the sliding door can be performed more easily, thereby improving the operability.

0012

[Embodiment] A preferred embodiment of the present invention will be described below with reference to the accompanying drawings. Fig. 1 shows a drive unit provided at the lower end of a sliding door 1 for a vehicle according to an embodiment of the present invention. In the figure, reference numeral 2 indicates a side sill located at the lower end of the vehicle body, 3 indicates a floor panel, and 4 indicates the floor panel 3.
This is a connection panel provided spanning between the lower surface on the side side of the vehicle body and the inner surface of the side sill 2, and the connection panel 4
A slide mechanism storage chamber 5 of a predetermined size is formed between the floor panel 3 and the floor panel 3 and opens to the side of the vehicle body and faces the lower part of the slide door 1.

In the slide mechanism storage chamber 5, there is provided a distal end portion of a support bracket 6 which is bolted to the inner panel 1a of the sliding door 1 and whose distal end portion 6a extends inward of the vehicle body. 6a is allowed to enter. The support bracket tip 6a includes a horizontal guide roller 7 that engages with a guide rail 9 arranged on the floor panel 3 side in the longitudinal direction of the vehicle body, and a vertical guide roller that rolls on the connection panel 4. 8 is attached, and the sliding door 1 is guided and supported by the horizontal guide rollers 7 and the vertical guide rollers 8, and is movable in the longitudinal direction of the vehicle body.

Further, in this embodiment, by applying the present invention, an ultrasonic motor Y and a crimping mechanism X, which will be described later, are arranged between the support bracket 6 and the floor panel 3 as sliding door driving means.

As shown in FIGS. 2 and 3, the ultrasonic motor Y has a piezoelectric element 12 mounted on the lower surface of a base plate 16 that is horizontally disposed at a predetermined interval in the vertical direction with respect to the floor panel 3. A vibrating body 10 is formed by arranging a plurality of piezoelectric elements 12, 12, etc. and closely fixing an elastic body 11 such as a rubber material on the surface of each piezoelectric element 12, 12, . . . and a movable body 15 that is crimped onto or separated from the elastic body 11 by a crimping mechanism X.

[0016] The piezoelectric elements 12, 12, . . .
As shown in FIG. 2, alternating current voltages with different phases are applied from both ends of the ultrasonic motor control circuit 23, respectively. That is, an AC voltage of a predetermined frequency is applied to both ends of the vibrating body 10 from the oscillator 25 of the ultrasonic motor control circuit 23 in response to a control signal from the first controller 21, which will be described later. The phase of the AC voltage applied to both the left and right ends is shifted by a predetermined phase. Due to this phase shift, each piezoelectric element 12
, 12, . . . when the strain vibrations are in a steady state, the vibration waves move in the left-right direction and are transmitted as they are to the surface of the elastic body 11 as moving waves. Therefore,
When the movable body 15 is pressed against the surface of the elastic body 11 on which such a moving wave is generated by the crimping mechanism The sliding door 1 is moved in the left-right direction following the movement of the moving wave, and as a result, the sliding door 1 connected to the moving body 15 is opened and closed (realization of the opening and closing operation of the sliding door 1).

On the other hand, this means that the moving body 15 and the elastic body 11
This means that if the elastic body 11 is not crimped, the sliding door 1 cannot be opened or closed no matter how much moving waves are generated in the elastic body 11, and the sliding door 1 can only be opened and closed manually. realization of operations).

Furthermore, when the movable body 15 and the elastic body 11 are crimped together, the phases of the AC voltages applied to both ends of the vibrating body 10 are matched to prevent the moving waves of the elastic body 11 from moving. When the vibrating body 10 is turned off, or when the power supply to the vibrating body 10 is cut off, the movement of the movable body 15 is prevented by the frictional force acting between the elastic body 11 and the movable body 15, and the sliding door 1 remains in its position. (realization of the holding action of the sliding door 1).

The above-mentioned control of the ultrasonic motor Y is performed by the first controller 21 and the second controller 22 in response to the operation of each switch, as will be described later.

As described above, the crimping mechanism X presses the elastic body 11 of the ultrasonic motor Y and the movable body 15 to each other or separates them as necessary to transfer the vibration by the moving wave of the vibrating body 10. This is for controlling the effect on the movable body 15, and as shown in FIG. 2 and FIG. A bracket 18 is provided. The crimping bracket 18 has an ultrasonic motor Y fixed to the base plate 16 inserted therein, and a roller 13 that rolls on the upper surface of the base plate 16, and a roller 13 that rolls on the upper surface of the base plate 16. A crimping motor 17 for pressing the movable body 15 toward the elastic body 11 is attached to the lower side of the body 15, respectively. The operation of the crimping mechanism X is controlled by a control signal from the second controller 22, as shown in FIG.

Next, a first controller 21 and a second controller 2 which control the ultrasonic motor Y and the crimping mechanism
2 and each switch that outputs an operation signal to these will be explained. As shown in FIG. 4, the vehicle of this embodiment is provided with two switches at three positions: the driver's seat, the inside of the sliding door 1, and the outside of the sliding door 1. Specifically, on the driver's seat there is an open/close switch SW-1A for opening/closing the sliding door 1, and an automatic/manual changeover switch SW-1B for switching between automatic/manual, and on the inside of the sliding door there is also a switch SW-1A for opening/closing the sliding door 1. A switch SW-2A and an automatic/manual changeover switch SW-2B are provided, and an open/close switch SW-3A and an automatic/manual changeover switch SW-3B are provided on the outside of the sliding door. Among these switches, each open/close switch (SW-1A) to (S
W-3A) is the first switch in the claims, and each automatic/manual changeover switch (SW-1B) to (SW-3
B) corresponds to the second switch in the claims, and each of these open/close switches (SW-1A) to (SW-3A)
) switch signals are sent to the first controller 21, and each automatic/manual changeover switch (SW-1B) to (SW-3B)
The switch signals are respectively input to the second controller 22. The first controller 21 outputs a control signal for opening and closing the door to the ultrasonic motor control circuit 23, and the second controller 22 outputs a control signal for crimping control to the crimping motor control circuit 24. It is now possible to do so.

The logic of each of these switches is set as shown in FIGS. 5 and 6, respectively. That is, when any one of the open/close switches (SW-1A) to (SW-3A) is set in the open direction as shown in FIG. The slide door open signal is output, but even if any one of these open/close switches is set to the close direction, the slide door close signal is not output by itself, and at the same time, all of these switches are set to the open direction. A sliding door closing operation signal is output to the ultrasonic motor control circuit 23 only when the sliding door is not opened, thereby ensuring safety in opening and closing the sliding door.

On the other hand, each of the automatic/manual changeover switches (SW-1B) to (SW-3B) is configured such that one of these automatic/manual changeover switches is set to the manual side, as shown in FIG. If so, a manual operation signal is immediately output to the crimping motor control circuit 24, and the crimping mechanism X is brought into the crimping release state. On the other hand, when setting the switch to the automatic side, the crimping motor control circuit 24 is not activated until all of the automatic/manual changeover switches are set to the automatic side and none of them are set to the manual side. An automatic operation signal is output to the crimping mechanism X, and the crimping mechanism X is brought into the crimping state.

Next, the operation and operation of the sliding door 1 constructed as described above will be explained. First, in normal use, each automatic/manual changeover switch (SW-1B)
~ (SW-3B) are both set to the automatic side,
The crimping motor control circuit 24 causes the crimping mechanism X to be in a crimping state. Therefore, in this state, when none of the open/close switches (SW-1A) to (SW-3A) are operated, the elastic body 11 of the ultrasonic motor Y and the moving body 15 act between them. They are integrated by frictional force, and the sliding door 1 is held in its current open/closed position, thereby reliably preventing the sliding door 1 from opening or closing inadvertently.

On the other hand, in this state, each open/close switch (
When at least one of SW-1A) to SW-3A is operated in the opening direction, the moving wave of the vibrating body 10 is moved in the opening direction, and the sliding door 1 is operated to open. Conversely, each open/close switch (SW-1A) ~ (
When it is confirmed that at least one of SW-3A) is operated in the closing direction and none of them are operated in the opening direction, the moving wave of the vibrating body 10 is caused to move in the closing direction. , the sliding door 1 is operated to close.

Furthermore, in an emergency or the like where it is necessary to manually open and close the sliding door 1, one of the automatic/manual changeover switches (SW-1B) to (SW-3B) is operated to the manual side. Then, the crimping motor control circuit 2
4, the crimp mechanism X operates in the crimp release direction, and the elastic body 11 of the ultrasonic motor Y and the movable body 15 are separated from each other. Therefore, in this state, the sliding door 1
can be opened and closed manually without any resistance from the ultrasonic motor Y side.

FIG. 7 shows an opening/closing switch SW-2A and an automatic/manual changeover switch SW-2 provided on the inside of the sliding door as specific examples of the mounting structure of each of the above-mentioned switches.
The structure of part B is shown. In this embodiment, the opening/closing switch SW-2A can be operated in conjunction with the operation of the door handle 30, and the door handle 30 is connected to a lever pivoted on a fulcrum shaft 33. When the knob 31 is tilted in the opening direction or the closing direction, the lever part 32 is used to operate the left and right pair of first limit switches 34A and second limit switches 34B. are selectively introduced. Incidentally, here, these two limit switches 34A and 34B are used to open and close the above-mentioned open/close switch SW.
-2A is configured. Further, the automatic/manual changeover switch SW-2B is composed of a seesaw switch, and is provided near the door handle 30.

By using the ultrasonic motor Y as the driving means for the sliding door 1 as in this embodiment, the ultrasonic motor Y itself is smaller than the conventional rotating magnetic field type motor. By making the slide mechanism storage chamber 5 itself smaller, the device can be made more compact. In addition, when the crimping state by the crimping mechanism can be opened and closed more easily, improving operability during manual operation. Furthermore, since the vibrating body 10 that requires electricity is placed on the vehicle body side, wiring only needs to be done on the vehicle body side, thereby simplifying the wiring work and improving maintainability.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a main part of a sliding door according to an embodiment of the present invention.

FIG. 2 is a view taken along arrow II-II in FIG. 1;

FIG. 3 is an enlarged view of section III in FIG. 1;

FIG. 4 is a wiring diagram of the ultrasonic motor control switch shown in FIG. 1;

FIG. 5 is a logic circuit diagram of each open/close switch in FIG. 4;

FIG. 6 is a logic circuit diagram of each automatic/manual changeover switch in FIG. 4;

FIG. 7 is a cross-sectional view showing a specific structural example of a switch operation section inside the sliding door.

[Explanation of symbols]

1 is a sliding door, 2 is a side sill, 3 is a floor panel, 4 is a connection panel, 5 is a slide mechanism storage chamber, 6 is a support bracket, 7 is a horizontal guide roller, 8 is a vertical guide roller, 9 is a guide rail, 10 is An ultrasonic motor, 11 an elastic body, 12 a piezoelectric ceramic, 13 a roller, 15 a moving body, 16 a base plate, 17 a crimping motor,
18 is a crimping bracket, 21 is a first controller, 2
2 is a second controller; 23 is an ultrasonic motor control circuit;
24 is a crimping motor control circuit, 25 is an oscillator, 26 is a phase shifter, 30 is a door handle, (SW-1A) to (SW-3A) are open/close switches, (SW-1B) to (SW-3B)
) is an automatic/manual changeover switch.

Claims (1)

[Claims] 1. A sliding door for a vehicle, which is attached to an opening formed in a side of the vehicle body so as to be slidable in the longitudinal direction of the vehicle body, and is configured to open and close the opening by the sliding action of the sliding door. Between the door and the vehicle body, there is a piezoelectric element that can generate distorted vibrations of a predetermined frequency by applying an alternating current voltage to both ends thereof, and can move or stop the waveform of the distorted vibrations by controlling the phase of each alternating voltage. A plurality of elements are arranged in a row in the longitudinal direction of the vehicle body, and an elastic body that generates a moving wave on the surface by following the strain vibration of each piezoelectric element is closely fixed to the surface of each piezoelectric element. An ultrasonic motor is provided, which includes a vibrating body made of a first switch for selectively setting the moving direction of the moving wave of the vibrating body to the front side or the rear side of the vehicle; A sliding door for a vehicle, comprising a second switch that releases the crimping action of the crimping mechanism in the second setting position.