JP4347302B2 - Sliding door structure - Google Patents

Description

  The present invention relates to a sliding door structure, and more particularly to a sliding door structure that determines interference between a sliding door that opens and closes a door opening provided in a vehicle body and an obstacle.

As this kind of sliding door structure, the following is known (for example, refer to Patent Document 1). For example, Patent Document 1 discloses an example of a slide door structure in which a wire is provided on a slide door and the slide door is slid by winding the wire. In the example described in Patent Document 1, a drum for winding a wire is rotated by a motor, and the interference between the sliding door and an obstacle is determined by detecting a current change of the motor. It has become.
JP 2004-19199 A JP 2004-176417 A

  However, in a slide door structure in which the slide door is slid by swinging the link arm, for example, as described in Patent Document 1, an interference (clamping) between the slide door and an obstacle is determined by detecting a change in the current of the motor. In such a case, the load is transmitted from the slide door to the motor via the link arm. Therefore, for example, there is a possibility that a time lag occurs in the pinching detection due to deformation of the link arm or the like, and there is room for improvement in order to more quickly detect the pinching of the slide door.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a slide door structure that can more quickly detect interference (squeezing) between a slide door and an obstacle. .

  In order to solve the above-mentioned problem, the sliding door structure according to claim 1, wherein one end side is pivotally connected to a vehicle body, and the other end side of the link arm is pivotally attached. Based on the slide door that opens and closes the door opening provided in the vehicle body by swinging the arm, the arm deformation detection means that outputs a signal corresponding to the deformation of the link arm, and the signal output from the arm deformation detection means And a pinch judging means for judging interference between the sliding door and an obstacle.

  In this way, in the sliding door structure according to the first aspect, the deformation of the link arm located closer to the sliding door is directly detected by the arm deformation detecting means, so that the interference between the sliding door and the obstacle (pinching) ) Time lag from occurrence to pinching judgment can be reduced. Thereby, it becomes possible to detect pinching of the slide door more quickly.

  The invention according to claim 2 is the sliding door structure according to claim 1, wherein the sliding door is configured to open and close the door opening by swinging the plurality of link arms, and the plurality of link arms. Each of which is provided with the arm deformation detection means, and the pinching determination means determines interference between the sliding door and an obstacle based on signals output from the plurality of arm deformation detection means. And

  Thus, in the sliding door structure according to the second aspect, the deformation of the plurality of link arms is used as a determination element for occurrence of pinching. Thereby, the pinch detection accuracy of the slide door is improved as compared with the configuration in which the pinch occurrence is determined based on the deformation of one link arm.

  The sliding door structure according to claim 3 is the sliding door structure according to claim 1 or 2, wherein the arm deformation detection means outputs a signal corresponding to a deformation amount and a deformation direction of the link arm, The sandwiching judging means judges interference between the sliding door and an obstacle based on a signal output from the arm deformation detecting means.

  Thus, in the sliding door structure according to the third aspect, the deformation amount and the deformation direction of the link arm are directly detected by the arm deformation detection means when the link arm swings. As a result, for example, the sliding door displacement position state (door tilt state in plan view of the vehicle) at the time of pinching, the direction and magnitude of the pinching load to the sliding door, and the like, as well as whether or not the sliding door has pinched The state can also be detected.

  The sliding door structure according to claim 4 is the sliding door structure according to any one of claims 1 to 3, wherein the driving means for swinging the link arm and the driving speed of the driving means are used. Speed detection means for outputting the detected signal, and the pinching judgment means is configured such that the sliding door and the obstacle are based on the signal output from the arm deformation detection means and the signal output from the speed detection means. It is characterized by determining interference.

  As described above, in the sliding door structure according to the fourth aspect, the driving speed of the driving means is added to the determination factor of occurrence of pinching. As a result, for example, it is possible to detect a minute pinching load on the sliding door, such as determining whether pinching has occurred based on a change in the driving speed of the driving means when the deformation amount of the link arm is small when the sliding door is pinching. .

  The sliding door structure according to claim 5 is the sliding door structure according to any one of claims 1 to 3, wherein the signal according to the deformation of the support portion of the link arm in the vehicle body or the sliding door. Supporting section deformation detecting means for outputting the signal, and the pinching determining means is based on the signal output from the arm deformation detecting means and the signal output from the supporting section deformation detecting means. It is characterized by determining interference.

  As described above, in the sliding door structure according to the fifth aspect, the deformation of the support portion of the link arm in the vehicle body or the sliding door is added to the determination factor of occurrence of pinching. Thus, for example, when the amount of deformation of the link arm is small when the sliding door is pinched, the occurrence of pinching is determined based on the amount of deformation of the support portion of the link arm in the vehicle body or the sliding door. The load can also be detected.

  The sliding door structure according to claim 6 is the sliding door structure according to claim 5, wherein the support portion deformation detecting means is configured to change the deformation amount and the deformation direction of the support portion of the link arm in the vehicle body or the slide door. A corresponding signal is output, and the pinch determination means determines interference between the slide door and an obstacle based on the signal output from the arm deformation detection means and the signal output from the support section deformation detection means. It is characterized by that.

  Thus, in the sliding door structure according to the sixth aspect, the deformation amount and the deformation direction of the support portion of the link arm in the vehicle body or the sliding door are used as the determination factors for occurrence of pinching. Accordingly, for example, as compared with the configuration in which the occurrence of pinching is determined based on the deformation when the link arm swings, the occurrence of pinching is determined in consideration of the deformation amount and the deformation direction of the support portion. It becomes possible to detect the pinching of the door with higher accuracy.

  A sliding door structure according to a seventh aspect is the sliding door structure according to the fifth or sixth aspect, wherein the driving means for swinging the link arm and a signal corresponding to the driving speed of the driving means are output. Speed detection means, the pinching determination means based on the signal output from the arm deformation detection means, the signal output from the speed detection means, and the signal output from the support portion deformation detection means The interference between the sliding door and an obstacle is determined.

  As described above, in the sliding door structure according to the seventh aspect, the driving speed of the driving means is added to the determination factor of occurrence of pinching. Thereby, for example, the occurrence of pinching is determined based on the change in the driving speed of the driving means when the deformation amount of the link arm and the deformation amount of the support portion of the link arm are small when the sliding door is pinched. A smaller pinching load can be detected. In place of the speed detection means, a current detection means for detecting a current change in the drive means may be provided, and the current change in the drive means may be added to the determination factor of the occurrence of pinching.

  As described above in detail, according to the present invention, it is possible to more quickly detect pinching of the slide door.

  The sliding door structure of the present invention is suitably used for, for example, a sliding door provided on a side surface of a vehicle such as a passenger car. Hereinafter, an example in which the sliding door structure of the present invention is applied to a side door of a vehicle will be described as an example. It should be noted that members, arrangements, and the like described below do not limit the present invention, and it goes without saying that various modifications can be made in accordance with the spirit of the present invention.

[First embodiment]
First, the configuration of the sliding door structure 10 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 4.

  As shown in FIG. 1, in the sliding door structure 10 according to the present embodiment, the sliding door 12 is provided on the rear side surface of the vehicle. The vehicle rocker portion 14 of the present embodiment is provided with a hinge base 16 on the vehicle body side. The hinge base 16 has one ends of a pair of link arms 18 and 20 arranged in parallel in the vehicle front-rear position. The sides are rotatably connected by hinge pins 22.

  On the other hand, the slide door 12 of the present embodiment is provided with an inner panel 24, and a door hinge 26 formed along the vehicle front-rear direction at a portion of the inner panel 24 facing the rocker portion 14 on the vehicle inner side. Is arranged. The other end of the pair of link arms 18 and 20 is rotatably connected to the door hinge 26 by a hinge pin 28.

  Of the pair of link arms 18, 20, the link arm 20 on the vehicle rear side is swung by a door drive motor 30 as drive means fixed coaxially to a hinge pin 22 on the vehicle body side of the link arm 20. It is like that. The slide door 12 is configured to slide in the vehicle front-rear direction by opening and closing the door opening provided in the vehicle body by the swing of the link arm 20.

  Further, the link arm 20 on the rear side of the vehicle serves as an arm deformation detection unit at a position where the distortion becomes the largest when the slide door 12 interferes with the obstacle 50 on the vehicle body side and the rear side of the vehicle in the longitudinal direction. A strain sensor 32 is provided. The strain sensor 32 converts the deformation (bending deformation) of the link arm 20 into an electric signal when the link arm 20 swings, and outputs a signal corresponding to the deformation amount of the link arm 20.

  And the control unit 40 is provided in the sliding door structure 10 of this embodiment. The strain sensor 32 is wired to the input side of the control unit 40, and the door drive motor 30 is wired to the output side of the control unit 40. The control unit 40 may be configured with an electric circuit including a CPU, a ROM, a RAM, and the like, or may be configured with an electric circuit including a logic circuit, an analog circuit, and the like.

  Next, the operation of the slide door structure 10 having the above configuration will be described together with the operation thereof.

  When a door opening command signal is output from the control unit 40 to the door drive motor 30, the door drive motor 30 is driven to rotate in the door opening direction. Thereby, the link arm 20 rotates to the door rear side, and the slide door 12 slides to the vehicle rear side from the position which closes a door opening. And the control unit 40 performs the process of the flowchart shown by FIG. 4 while the slide door 12 slides to the vehicle rear side from the position which closes a door opening.

  That is, the control unit 40 inputs a strain signal corresponding to the deformation amount of the link arm 20 from the strain sensor 32 when the link arm 20 rotates (step S1), and detects a strain value based on the strain signal from the strain sensor 32. Is greater than or equal to a preset threshold value A (preset by calculating a load applied to the slide door 12 from the distortion of the link arm 20) (step S2). At this time, when the sliding door 12 is sliding without interfering with the obstacle 50, as shown by the timings t0 to t1 in FIG. 3, the sliding door 12 corresponds to the deformation amount of the link arm 20 from the strain sensor 32. The distortion signal is constant and very small, and the distortion detection value is less than the threshold value A. Therefore, in this case, the control unit 40 determines that the strain detection value based on the strain signal from the strain sensor 32 is not equal to or greater than the preset threshold value A (step S2: NO), and returns to the processing of step S1. .

  On the other hand, for example, as shown in FIG. 2A, when the sliding door 12 interferes with the obstacle 50 when the sliding door 12 slides, the link arm 20 is deformed (in this case, bent to the rear side of the vehicle). ) For this reason, as shown in FIG. 3, the strain detection value corresponding to the amount of deformation of the link arm 20 from the strain sensor 32 increases after the timing t1 when the sliding door 12 interferes with the obstacle 50, and after the timing t2. The strain corresponding to the deformation amount of the link arm 20 is equal to or greater than the threshold value A. Therefore, in this case, the control unit 40 determines that the strain detection value based on the strain signal from the strain sensor 32 is greater than or equal to the preset threshold value A (step S2: YES).

  Then, the control unit 40 determines the interference of the slide door 12 with the obstacle 50, that is, the occurrence of pinching of the slide door 12, and drives the door drive motor 30 to rotate a predetermined amount in the door closing direction or immediately stops it. The pinching of the slide door 12 is eliminated (step S3).

  Although the case where the sliding door 12 slides in the door opening direction has been described so far, the control unit 40 is also shown in FIG. 4 while the sliding door 12 slides from the rear of the vehicle to the position where the door opening is closed. The processing of the flowchart is performed. That is, for example, as shown in FIG. 2B, when the sliding door 12 interferes with the obstacle 50 when the sliding door 12 slides in the door closing direction, the link arm 20 is deformed (in this case, the vehicle The strain detection value based on the strain signal from the strain sensor 32 is equal to or greater than a preset threshold value A. Therefore, in this case, the control unit 40 determines interference with the obstacle 50 of the slide door 12, that is, occurrence of pinching of the slide door 12 (step S2: YES), and rotates the door drive motor 30 by a predetermined amount in the door opening direction. It is driven or stopped immediately to eliminate the pinching of the slide door 12 (step S3).

  Thus, in the slide door structure 10 according to the present embodiment, the deformation sensor 32 directly detects the deformation amount of the link arm 20 located closer to the slide door 12 than the door drive motor 30. Therefore, the time lag from the occurrence of pinching of the sliding door 12 to the pinching determination can be reduced as compared with the conventional configuration in which pinching determination is performed based on the current change of the motor. Thereby, it becomes possible to detect pinching of the slide door more quickly.

  Next, a modification of this embodiment will be described.

  In the above embodiment, the strain sensor 32 is used to output a signal corresponding to the deformation amount when the link arm 20 swings. However, other deformation detection sensors are used to swing the link arm 20 when swinging. A signal corresponding to the amount of deformation may be output.

  Further, in the above-described embodiment, the strain sensor 32 is provided on the link arm 20 on the vehicle rear side (in this case, the side driven by the door drive motor 30) of the pair of link arms 18 and 20, and the slide door 12 is caught. However, the strain sensor 32 is provided on the link arm 18 on the vehicle front side (in this case, the side not driven by the door drive motor 30) of the pair of link arms 18 and 20, and the slide door 12 is sandwiched between them. The occurrence may be determined.

  For example, as shown in FIG. 2A, the link arm 18 on the vehicle front side is compressed and deformed in the longitudinal direction when the slide door 12 interferes with the obstacle 50 when the door is opened. Further, as shown in FIG. 2B, when the sliding door 12 interferes with the obstacle 50 when the door is closed, the sliding door 12 is stretched and deformed. Therefore, when the strain sensor 32 is provided in the link arm 18 on the vehicle front side, the strain sensor 32 needs to be attached so as to be able to detect the deformation amount in the compression deformation and the extension deformation of the link arm 18.

[Second Embodiment]
Next, the configuration of the sliding door structure 60 according to the second embodiment of the present invention will be described with reference to FIGS.

  The sliding door structure 60 according to the second embodiment of the present invention is provided with a rotation sensor 42 as a speed detecting means in the sliding door structure 10 according to the first embodiment of the present invention, and shown in FIG. The processing of the flowchart is performed. Hereinafter, the sliding door structure 60 according to the second embodiment of the present invention will be described only with respect to parts different from the sliding door structure 10 according to the first embodiment, and the same configuration as the sliding door structure 10 according to the first embodiment will be described. The description is omitted by using the same reference numerals.

  In the sliding door structure 60 according to the second embodiment of the present invention, the rotation sensor 42 is configured by, for example, a rotary encoder or the like, and is configured to output a rotation speed signal corresponding to the rotation speed of the door drive motor 30. Yes.

  In the sliding door structure 60 according to the present embodiment, as shown in FIG. 5, the strain sensor 32 and the rotation sensor 42 are connected to the input side of the control unit 40, and the output side of the control unit 40. The door drive motor 30 is connected by wiring.

  Next, the operation of the slide door structure 60 having the above configuration will be described together with the operation thereof.

  When a door opening command signal is output from the control unit 40 to the door drive motor 30, the door drive motor 30 is driven to rotate in the door opening direction. Thereby, the link arm 20 rotates to the door rear side, and the slide door 12 slides to the vehicle rear side from the position which closes a door opening. Then, the control unit 40 performs the processing of the flowchart shown in FIG. 7 while the slide door 12 slides from the position where the door opening is closed to the vehicle rear side.

  That is, the control unit 40 inputs a strain signal corresponding to the deformation amount of the link arm 20 from the strain sensor 32 when the link arm 20 is rotated (step S11). Then, it is determined whether or not the strain detection value based on the strain signal from the strain sensor 32 is greater than or equal to a preset threshold value B (step S12). At this time, when the slide door 12 slides without interfering with the obstacle 50, the deformation amount of the link arm 20 from the strain sensor 32 as shown by the timings t0 to t1 in FIG. The distortion signal corresponding to is constant and very small, and the distortion detection value is less than the threshold value B. Therefore, in this case, the control unit 40 determines that the strain detection value based on the strain signal from the strain sensor 32 is not equal to or greater than the preset threshold value B (step S12: NO), and returns to the processing of step S11. .

  On the other hand, when the sliding door 12 interferes with the obstacle 50 when the sliding door 12 slides (see, for example, FIG. 2A), the link arm 20 is deformed (in this case, bent toward the vehicle rear side). For this reason, as shown in FIG. 6A, after the timing t1 when the sliding door 12 interferes with the obstacle 50, the strain detection value corresponding to the deformation amount of the link arm 20 from the strain sensor 32 increases, and the timing After t2, the strain corresponding to the deformation amount of the link arm 20 becomes equal to or greater than the threshold value B. Therefore, in this case, the control unit 40 determines that the strain detection value based on the strain signal from the strain sensor 32 is greater than or equal to a preset threshold value B (step S12: YES).

  Subsequently, the control unit 40 counts, for example, a built-in counter and waits for a certain period of time (step S13). Then, after a certain time Δt waits (for example, at timing t3 if it is determined that the threshold value B is equal to or greater than the threshold B at timing t2), the deformation amount of the link arm 20 from the strain sensor 32 when the link arm 20 rotates. Is again input (step S14), and it is determined again whether or not the strain detection value based on the strain signal from the strain sensor 32 is equal to or greater than a preset threshold value B (step S15).

  In short, when a disturbance or the like acts on the slide door 12 such as when a gust blows on the slide door 12 when the slide door 12 slides, the strain detection value based on the strain signal from the strain sensor 32 is, for example, It is conceivable that the pulsation occurs as shown in FIG. Therefore, in the present embodiment, in order to eliminate the influence of disturbance or the like that has acted on the slide door 12, as described above, the strain detection value based on the strain signal from the strain sensor 32 input first in step S11 is calculated. Even when the threshold value B is equal to or greater than the threshold value B, it is not immediately determined that pinching has occurred and waits for a certain period of time, and then a strain detection value based on a strain signal from the strain sensor 32 input second is set in advance. It is determined again whether or not the value is greater than or equal to value B (step S15). In this case, the weight of step S13 is set to be longer than the pulsation period T shown in FIG.

  If it is determined that the strain detection value based on the strain signal from the second input strain sensor 32 is greater than or equal to the preset threshold value B (step S15: YES), the strain sensor 32 continues to It is determined whether or not the distortion detection value based on the distortion signal is equal to or greater than a preset threshold value A (step S16). At this time, when the control unit 40 determines that the strain detection value based on the strain signal from the strain sensor 32 is equal to or greater than the preset threshold value A (step S16: YES), the obstacle of the slide door 12 is obstructed. 50, that is, occurrence of pinching of the slide door 12 is determined, and the door drive motor 30 is driven to rotate by a predetermined amount in the door closing direction or is immediately stopped to eliminate pinching of the slide door 12 (step S17).

  On the other hand, even when the control unit 40 determines in the process of step S16 that the strain detection value based on the strain signal from the strain sensor 32 is not equal to or greater than the preset threshold A (step S16: NO), step S15 is performed. If it is determined that the strain detection value based on the strain signal from the strain sensor 32 is equal to or greater than the preset threshold value B in the process of (2), it is determined that there is no pinching and the series of processes is not terminated. Perform the process. Similarly, when the control unit 40 determines in the process of step S15 that the strain detection value based on the strain signal from the strain sensor 32 is not equal to or greater than the preset threshold value B (step S15: NO), that is, Even when the strain detection value based on the strain signal from the strain sensor 32 is less than the preset threshold value B, the following processing is performed instead of determining that no jamming has occurred and ending the series of processing.

  In other words, the control unit 40 determines that the sliding door 12 is in an obstacle state based on the rotational speed signal input from the rotation sensor 42 between the timing t1 when the sliding door 12 interferes with the obstacle 50 and the timing t3 when the sandwiching determination is performed. The change in the rotational speed of the door drive motor 30 is calculated from the timing t1 at which the object 50 is interfered to the timing t3 at which the pinch determination is made (step S18). That is, when the sliding door 12 interferes with the obstacle 50, as shown in FIG. 6B, the rotational speed of the door drive motor 30 decreases after the timing t1. Therefore, in the process of step S18, the amount of change in the decrease in the rotational speed of the door drive motor 30 due to the occurrence of pinching is calculated.

  Then, it is determined whether or not the amount of change in the rotational speed reduction of the door drive motor 30 calculated in step S18 is equal to or greater than a preset specified value (step S19). At this time, if it is determined that the amount of change in the rotational speed reduction of the door drive motor 30 is not equal to or greater than a preset specified value (step S19: NO), it is determined that there is no pinching and the process returns to step S11.

  On the other hand, when it is determined that the amount of change in the rotational speed reduction of the door drive motor 30 is equal to or greater than a predetermined value set in advance (step S19: YES), interference with the obstacle 50 of the slide door 12, that is, The occurrence of pinching of the slide door 12 is determined, and the door drive motor 30 is driven to rotate by a predetermined amount in the door closing direction or is immediately stopped to eliminate pinching of the slide door 12 (step S17).

  Up to this point, the case where the slide door 12 slides in the door opening direction has been described, but the control unit 40 is also shown in FIG. 7 while the slide door 12 slides from the rear of the vehicle to the position where the door opening is closed. The processing of the flowchart is performed. That is, when the sliding door 12 interferes with the obstacle 50 when the sliding door 12 slides in the door closing direction (see, for example, FIG. 2B), the link arm 20 is deformed (in this case, bent toward the vehicle front side). Deformation) and the strain detection value based on the strain signal from the strain sensor 32 is greater than or equal to a preset threshold A, or the amount of change in the rotational speed reduction of the door drive motor 30 is greater than or equal to a preset specified value. . Therefore, in this case, the control unit 40 determines whether the sliding door 12 interferes with the obstacle 50, that is, the sliding door 12 is caught, and drives the door driving motor 30 to rotate a predetermined amount in the door opening direction, or immediately. It stops and the pinching of the sliding door 12 is eliminated (step S17).

  As described above, in the sliding door structure 60 according to the present embodiment, when the deformation amount of the link arm 20 is large when the sliding door 12 is caught, the link arm positioned closer to the sliding door 12 than the door drive motor 30 is. The sandwiching determination is performed based on the 20 deformation amount. Therefore, the time lag from the occurrence of pinching to the pinching determination can be reduced as compared with the conventional configuration in which pinching determination is performed based on the current change of the motor. Thereby, it becomes possible to detect the pinching of the slide door 12 more quickly.

  Further, in the sliding door structure 60 according to the present embodiment, when the deformation amount of the link arm 20 is small when the sliding door 12 is caught, it is determined whether the sliding door 12 is caught based on the change in the rotational speed of the door drive motor 30. To do. As a result, for example, a minute pinching load on the slide door 12 that does not involve deformation of the link arm 20 can be detected.

  Of course, the sliding door structure 60 according to the second embodiment of the present invention can be modified in the same manner as the sliding door structure 10 according to the first embodiment. Further, in the above embodiment, the rotation sensor 42 for detecting the rotation speed of the door drive motor 30 is provided, and the change in the rotation speed of the door drive motor 30 is added to the determination factor of the occurrence of pinching. A current detecting means for detecting a change in the current of the door drive motor 30 may be provided, and the change in the current of the door drive motor 30 may be added to the determination factor for the occurrence of the pinching.

[Third embodiment]
Next, the configuration of the sliding door structure 70 according to the third embodiment of the present invention will be described with reference to FIGS. 8 to 10.

  The slide door structure 70 according to the third embodiment of the present invention is provided with a door hinge 44 as a support portion instead of the door hinge 26 of the slide door structure 60 according to the second embodiment of the present invention. A strain sensor 34 as a deformation detecting means is provided, and the control unit 40 is made to perform the processing of the flowchart shown in FIG. Hereinafter, the sliding door structure 70 according to the third embodiment of the present invention will be described only with respect to parts different from the sliding door structure 60 according to the second embodiment, and the same configuration as the sliding door structure 60 according to the second embodiment will be described. The description is omitted by using the same reference numerals.

  In the sliding door structure 70 according to the third embodiment of the present invention, the door hinges 44 are fastened and fixed to the inner panel 24 of the sliding door 12 by fixing members 46 and 48 at two positions in the vehicle front-rear direction. Further, as shown in FIG. 8B, the strain sensor 34 is a place where the strain generated in the door hinge 44 can be easily detected when the slide door 12 is sandwiched, and the slide door 12 of the link arm 20 on the driving side in the door hinge 44. Near the fixed shaft (hinge pin 28) between the fixed shaft and the fastening point of the fixing tool 48. The strain sensor 34 converts the deformation of the door hinge 44 into an electrical signal and outputs a signal corresponding to the deformation amount of the door hinge 44.

  In the sliding door structure 70 according to the present embodiment, as shown in FIG. 8A, strain sensors 32 and 34 and a rotation sensor 42 are connected to the input side of the control unit 40, and control is performed. A door drive motor 30 is wired to the output side of the unit 40.

  Next, the operation of the sliding door structure 70 having the above configuration will be described together with the operation thereof.

  When a door opening command signal is output from the control unit 40 to the door drive motor 30, the door drive motor 30 is driven to rotate in the door opening direction. Thereby, the link arm 20 rotates to the door rear side, and the slide door 12 slides to the vehicle rear side from the position which closes a door opening. Then, the control unit 40 performs the processing of the flowchart shown in FIG. 10 while the slide door 12 slides from the position where the door opening is closed to the vehicle rear side.

  That is, the control unit 40 inputs a strain signal corresponding to the deformation amount of the link arm 20 from the strain sensor 32 when the link arm 20 rotates (step S21). Subsequently, the strain detection value based on the strain signal from the strain sensor 32 is any one of a predetermined threshold A or higher, a predetermined threshold B or higher and lower than the threshold A, or lower than the threshold B. Is determined (step S22).

  For example, as shown in FIG. 9A, the sliding door 12 interferes with the obstacle 50 when the sliding door 12 slides, and a strain detection value based on a strain signal from the strain sensor 32 is set in advance. If it is determined that A is greater than or equal to A, it is determined that the sliding door 12 interferes with the obstacle 50, that is, the sliding door 12 is caught, and the door driving motor 30 is rotated by a predetermined amount in the door closing direction, or Immediately stopping is performed to eliminate the pinching of the sliding door 12 (step S23).

  If the control unit 40 determines in the process of step S22 that the strain detection value based on the strain signal from the strain sensor 32 is greater than or equal to the preset threshold B and less than the threshold A, the control unit 40 A strain signal corresponding to the deformation of the door hinge 44 from the sensor 34 is input (step S24), and it is determined whether or not the strain detection value based on the strain signal from the strain sensor 34 is equal to or greater than a preset threshold value C. (Step S25).

  When the sliding door 12 interferes with the obstacle 50 when the sliding door 12 slides, for example, as shown in FIG. 9A, the door hinge 44 is bent and deformed to the outside of the vehicle, and the strain sensor 34 is compressed and deformed. At this time, if it is determined that the strain detection value based on the strain signal from the strain sensor 34 is equal to or greater than the preset threshold value C (step S25: YES), the sliding door 12 interferes with the obstacle 50, That is, occurrence of pinching of the slide door 12 is determined, and the door drive motor 30 is driven to rotate by a predetermined amount in the door closing direction or is immediately stopped to eliminate pinching of the slide door 12 (step S23).

  On the other hand, even if it is determined in the process of step S25 that the strain detection value based on the strain signal from the strain sensor 34 is not equal to or greater than the preset threshold C (step S25: NO), the process of step S22 performs the strain sensor. If it is determined that the distortion detection value based on the distortion signal from 32 is greater than or equal to the preset threshold value B and less than the threshold value A, it is determined that there is no pinching and the series of processing is not terminated. Perform the process. Similarly, even when the control unit 40 determines in the process of step S22 that the strain detection value based on the strain signal from the strain sensor 32 is less than the preset threshold value B, it determines that there is no pinching. Instead of ending the series of processing, the following processing is performed.

  That is, the control unit 40 slides on the basis of the rotation speed signal input from the rotation sensor 42 between the timing when the slide door 12 interferes with the obstacle 50 and the timing when the sandwiching determination is performed in the process of step S22. A change in the rotational speed of the door drive motor 30 is calculated from the timing when the door 12 interferes with the obstacle 50 to the timing when the sandwiching determination is made in the process of step S22 (step S26).

  Then, it is determined whether or not the amount of change in the rotational speed reduction of the door drive motor 30 calculated in step S26 is equal to or greater than a preset specified value (step S27). At this time, when it is determined that the amount of change in the rotational speed reduction of the door drive motor 30 is equal to or greater than a preset specified value (step S27: YES), the sliding door 12 interferes with the obstacle 50, that is, the sliding door. 12 is determined to occur, and the door drive motor 30 is driven to rotate by a predetermined amount in the door closing direction or is immediately stopped to eliminate the pinching of the slide door 12 (step S23).

  On the other hand, when it is determined that the amount of change in the decrease in the rotational speed of the door drive motor 30 calculated in step S26 is not equal to or greater than a preset specified value (step S27: NO), the door hinge 44 from the strain sensor 34 is A distortion signal corresponding to the deformation is input (step S28), and it is determined whether or not the distortion detection value based on the distortion signal from the distortion sensor 34 is equal to or greater than a preset threshold C (step S29).

  If it is determined that the strain detection value based on the strain signal from the strain sensor 34 is greater than or equal to the preset threshold C (step S29: YES), the interference with the obstacle 50 of the sliding door 12, that is, The occurrence of pinching of the sliding door 12 is determined, and the door driving motor 30 is driven to rotate by a predetermined amount in the door closing direction or is immediately stopped to eliminate pinching of the sliding door 12 (step S23).

  On the other hand, if it is determined that the strain detection value based on the strain signal from the strain sensor 34 is not equal to or greater than the preset threshold value C (step S29: NO), it is determined that there is no pinching and the process returns to step S21. .

  Up to this point, the case where the slide door 12 slides in the door opening direction has been described. However, the control unit 40 is also illustrated in FIG. 10 while the slide door 12 slides from the rear of the vehicle to the position where the door opening is closed. The processing of the flowchart is performed. That is, when the sliding door 12 interferes with the obstacle 50 when the sliding door 12 slides in the door closing direction (see, for example, FIG. 9B), the link arm 20 is bent and deformed forward of the vehicle, and the door hinge 44. Is bent toward the inside of the vehicle and the strain detection value based on the strain signal from the strain sensor 32 exceeds a preset threshold A, or the strain signal from the strain sensor 34 (in this case, the strain sensor 34 is stretched and deformed). The distortion detection value based on the threshold value C is equal to or greater than a preset threshold value C, or the amount of change in the rotational speed reduction of the door drive motor 30 is equal to or greater than a preset specified value. Therefore, in this case, the control unit 40 determines whether the sliding door 12 interferes with the obstacle 50, that is, the sliding door 12 is caught, and drives the door driving motor 30 to rotate a predetermined amount in the door opening direction, or immediately. It stops and the pinching of the sliding door 12 is eliminated (step S23).

  As described above, in the slide door structure 70 according to the present embodiment, when the deformation amount of the link arm 20 is large when the slide door 12 is caught, the link arm located closer to the slide door 12 than the door drive motor 30 is. The sandwiching determination is performed based on the 20 deformation amount. Therefore, the time lag from the occurrence of pinching to the pinching determination can be reduced as compared with the conventional configuration in which pinching determination is performed based on the current change of the motor. Thereby, it becomes possible to detect the pinching of the slide door 12 more quickly.

  Further, in the sliding door structure 70 according to the present embodiment, when the deformation amount of the link arm 20 is small when the sliding door 12 is caught, the occurrence of the sliding door 12 is judged based on the deformation amount of the door hinge 44. Thereby, the occurrence of pinching when the deformation amount of the link arm 20 is small can be detected.

  Further, for example, as shown in FIG. 9C, when wind or the like blows over the entire side surface of the slide door 12, the door hinge 44 is not deformed, and therefore, based on the deformation amount of the door hinge 44 as in the present embodiment. By determining whether the sliding door 12 has been pinched, it is possible to eliminate pinching erroneous detection due to the influence of wind or the like and accurately perform pinching detection.

  Further, in the sliding door structure 70 according to the present embodiment, when the amount of deformation of the link arm 20 and the door hinge 44 is small when the sliding door 12 is pinched, the sliding door 12 is pinched based on the rotational speed change of the door drive motor 30. Determine the occurrence. Thereby, for example, a smaller pinching load on the slide door 12 that does not involve deformation of the link arm 20 and the door hinge 44 can be detected.

  Next, a modification of this embodiment will be described.

  In the above embodiment, in addition to the deformation at the time of swinging of the link arm 20 and the deformation of the door hinge 44, the rotational speed of the door drive motor 30 is used as a determination factor for occurrence of pinching. Only the deformation at the time of swinging 20 and the deformation of the door hinge 44 may be used as the determination factors for occurrence of pinching.

  In the above-described embodiment, the strain sensor 34 is provided on the door hinge 44 on the slide door 12 side. However, the strain sensor 34 is provided on the hinge base 16 on the vehicle body side, and a determination element for occurrence of pinching the deformation of the hinge base 16. It is also good.

  In addition, of course, the sliding door structure 70 according to the third embodiment of the present invention can be modified similarly to the sliding door structure 60 according to the second embodiment.

[Fourth embodiment]
Next, the configuration of the sliding door structure 80 according to the fourth embodiment of the present invention will be described with reference to FIGS. 11 and 12.

  The slide door structure 80 according to the fourth embodiment of the present invention is provided with a strain sensor 36 on the link arm 18 instead of the strain sensor 34 of the slide door structure 70 according to the third embodiment of the present invention. . Hereinafter, the sliding door structure 80 according to the fourth embodiment of the present invention will be described only with respect to parts different from the sliding door structure 70 according to the third embodiment, and the same configuration as the sliding door structure 70 according to the third embodiment will be described. The description is omitted by using the same reference numerals. In the sliding door structure 80 according to the fourth embodiment of the present invention, the control unit 40 is configured to perform the same processing as the control unit 40 of the sliding door structure 70 according to the third embodiment of the present invention. For the operation, refer to the flowchart shown in FIG.

  In the slide door structure 80 according to the fourth embodiment of the present invention, the link arm 18 on the vehicle front side of the pair of link arms 18 and 20 includes the slide door 12 on the vehicle body side and the vehicle front side with respect to the middle portion in the longitudinal direction. A strain sensor 36 serving as an arm deformation detection means is provided at a position where the strain becomes the largest when it interferes with the obstacle 50. The strain sensor 36 converts the deformation of the link arm 18 into an electric signal when the link arm 18 swings, and outputs a signal corresponding to the amount of deformation of the link arm 18. Note that a door hinge 26 is provided on the slide door 12 side of the link arms 18 and 20, and a strain sensor 32 of the link arm 20 is provided on the vehicle front side of the link arm 20.

  In the sliding door structure 80 according to the present embodiment, as shown in FIG. 11, the strain sensors 32 and 34 and the rotation sensor 42 are connected to the input side of the control unit 40 by wiring. A door drive motor 30 is wired to the output side.

  Next, the operation of the sliding door structure 80 having the above configuration will be described together with the operation thereof.

  When a door opening command signal is output from the control unit 40 to the door drive motor 30, the door drive motor 30 is driven to rotate in the door opening direction. Thereby, the link arm 20 rotates to the door rear side, and the slide door 12 slides to the vehicle rear side from the position which closes a door opening. Then, the control unit 40 performs the processing of the flowchart shown in FIG. 10 while the slide door 12 slides from the position where the door opening is closed to the vehicle rear side.

  That is, the control unit 40 inputs a strain signal corresponding to the deformation amount of the link arm 20 from the strain sensor 32 when the link arm 20 rotates (step S21). Subsequently, the strain detection value based on the strain signal from the strain sensor 32 is any one of a predetermined threshold A or higher, a predetermined threshold B or higher and lower than the threshold A, or lower than the threshold B. Is determined (step S22).

  When the sliding door 12 interferes with the obstacle 50 when the sliding door 12 slides, the link arm 20 on the vehicle rear side is bent and deformed toward the vehicle rear side as shown in FIG. At this time, when it is determined that the strain detection value based on the strain signal from the strain sensor 32 is equal to or greater than the preset threshold value A, the sliding door 12 interferes with the obstacle 50, that is, the sliding door 12 is caught. The occurrence is determined, and the door drive motor 30 is rotationally driven by a predetermined amount in the door closing direction or is immediately stopped to eliminate the pinching of the slide door 12 (step S23).

  When the control unit 40 determines in the process of step S22 that the strain detection value based on the strain signal from the strain sensor 32 is greater than or equal to the preset threshold B and less than the threshold A, the link When the arm 18 rotates, a strain signal corresponding to the deformation of the link arm 18 is input from the strain sensor 36 (step S24), and the strain detection value based on the strain signal from the strain sensor 36 is equal to or greater than a preset threshold C. Is determined (step S25).

  If the sliding door 12 interferes with the obstacle 50 when the sliding door 12 slides, the link arm 20 on the vehicle rear side is bent and deformed toward the vehicle rear side as shown in FIG. The link arm 18 is compressed and deformed in the longitudinal direction. At this time, if it is determined that the strain detection value based on the strain signal from the strain sensor 36 is equal to or greater than a preset threshold C (step S25: YES), the sliding door 12 interferes with the obstacle 50, That is, occurrence of pinching of the slide door 12 is determined, and the door drive motor 30 is driven to rotate by a predetermined amount in the door closing direction or is immediately stopped to eliminate pinching of the slide door 12 (step S23).

  On the other hand, in the process of step S25, even when it is determined that the strain detection value based on the strain signal from the strain sensor 36 is not equal to or greater than the preset threshold value C (step S25: NO), the process of step S22 performs the strain sensor. If it is determined that the distortion detection value based on the distortion signal from 32 is greater than or equal to the preset threshold value B and less than the threshold value A, it is determined that there is no pinching and the series of processing is not terminated. Perform the process. Similarly, even when the control unit 40 determines in the process of step S22 that the strain detection value based on the strain signal from the strain sensor 32 is less than the preset threshold value B, it determines that there is no pinching. Instead of ending the series of processing, the following processing is performed.

  That is, the control unit 40 slides on the basis of the rotation speed signal input from the rotation sensor 42 between the timing when the slide door 12 interferes with the obstacle 50 and the timing when the sandwiching determination is performed in the process of step S22. A change in the rotational speed of the door drive motor 30 is calculated from the timing when the door 12 interferes with the obstacle 50 to the timing when the sandwiching determination is made in the process of step S22 (step S26).

  Then, it is determined whether or not the amount of change in the rotational speed reduction of the door drive motor 30 calculated in step S26 is equal to or greater than a preset specified value (step S27). At this time, when it is determined that the amount of change in the rotational speed reduction of the door drive motor 30 is equal to or greater than a preset specified value (step S27: YES), the sliding door 12 interferes with the obstacle 50, that is, the sliding door. 12 is determined to occur, and the door drive motor 30 is driven to rotate by a predetermined amount in the door closing direction or is immediately stopped to eliminate the pinching of the slide door 12 (step S23).

  On the other hand, when it is determined that the amount of change in the rotational speed decrease of the door drive motor 30 calculated in step S26 is not equal to or greater than a preset specified value (step S27: NO), the link arm 18 from the strain sensor 36 is determined. A distortion signal corresponding to the deformation is input (step S28), and it is determined whether or not the distortion detection value based on the distortion signal from the distortion sensor 36 is equal to or greater than a preset threshold C (step S29).

  If it is determined that the strain detection value based on the strain signal from the strain sensor 36 is greater than or equal to the preset threshold value C (step S29: YES), the interference with the obstacle 50 of the sliding door 12, that is, The occurrence of pinching of the sliding door 12 is determined, and the door driving motor 30 is driven to rotate by a predetermined amount in the door closing direction or is immediately stopped to eliminate pinching of the sliding door 12 (step S23).

  On the other hand, if it is determined that the strain detection value based on the strain signal from the strain sensor 36 is not greater than or equal to the preset threshold value C (step S29: NO), it is determined that there is no pinching and the process returns to step S21. .

  Up to this point, the case where the slide door 12 slides in the door opening direction has been described. However, the control unit 40 is also illustrated in FIG. 10 while the slide door 12 slides from the rear of the vehicle to the position where the door opening is closed. The processing of the flowchart is performed. That is, as shown in FIG. 12B, when the sliding door 12 interferes with the obstacle 50 when the sliding door 12 slides in the door closing direction, the link arm 20 is bent and deformed forward of the vehicle. The link arm 18 extends and deforms in the longitudinal direction so that the strain detection value based on the strain signal from the strain sensor 32 is equal to or higher than a preset threshold A, or the strain signal from the strain sensor 36 (in this case, the strain sensor). 36 is equal to or greater than a preset threshold value C, or the amount of change in the rotational speed reduction of the door drive motor 30 is equal to or greater than a preset specified value. Therefore, in this case, the control unit 40 determines whether the sliding door 12 interferes with the obstacle 50, that is, the sliding door 12 is caught, and drives the door driving motor 30 to rotate a predetermined amount in the door opening direction, or immediately. It stops and the pinching of the sliding door 12 is eliminated (step S23).

  Thus, in the sliding door structure 80 according to the present embodiment, the deformation of the plurality of link arms 18 and 20 is used as a determination element for occurrence of pinching. Thereby, the pinch detection accuracy of the slide door 12 is improved as compared with the configuration in which the pinch occurrence is determined based on the deformation amount of the single link arm 20.

  Further, in the slide door structure 80 according to the present embodiment, when the amount of deformation of the link arm 20 when the slide door 12 is caught is large, the link arm 20 positioned closer to the slide door 12 than the door drive motor 30 has. Judgment judgment is performed based on the deformation amount. Therefore, the time lag from the occurrence of pinching to the pinching determination can be reduced as compared with the conventional configuration in which pinching determination is performed based on the current change of the motor. Thereby, it becomes possible to detect the pinching of the slide door 12 more quickly.

  Further, in the sliding door structure 80 according to the present embodiment, when the deformation amount of the link arm 20 is small when the sliding door 12 is caught, the occurrence of the sliding door 12 is judged based on the deformation amount of the link arm 18. Thereby, the occurrence of pinching when the deformation amount of the link arm 20 is small can be detected.

  Furthermore, in the sliding door structure 80 according to the present embodiment, when the amount of deformation of the link arms 18 and 20 is small when the sliding door 12 is pinched, the sliding door 12 is pinched based on the rotational speed change of the door drive motor 30. Judging. Thereby, the occurrence of pinching when the deformation amount of the link arms 18 and 20 is small can be detected.

  In addition, according to the slide door structure 80 according to the present embodiment, when the obstacle 50 is directly sandwiched between the link arms 18 and 20, the slide door structure 80 is sandwiched at a position away from the support portion of the link arms 18 and 20. It can also be determined whether or not there is. In other words, when only deformation of one link arm 20 is detected, the state of the other link arm 18 is not known, so whether the pinching load is directly input to the link arm 20 or through the slide door 12. Although it cannot be determined whether the load is input, it is determined whether the pinching load is input directly to the link arm 20 or the slide door 12 by providing the strain sensors 32, 36 on the link arms 18, 20. It becomes possible to do. Thereby, pinching erroneous detection can be prevented.

  Next, a modification of this embodiment will be described.

  In the above embodiment, in addition to the deformation of the plurality of link arms 18 and 20 when the plurality of link arms 18 and 20 swing, the rotational speed of the door drive motor 30 is used as a determination factor for occurrence of pinching. As an omitted configuration, only the deformation of the plurality of link arms 18 and 20 when the plurality of link arms 18 and 20 are swung may be used as a determination factor for occurrence of pinching.

  In the above embodiment, one strain sensor 32, 36 is provided for each of the plurality of link arms 18, 20, but a plurality of strain sensors 32, 36 are provided for each of the plurality of link arms 18, 20. It is also possible to determine whether the pinching has occurred.

  In addition, it is needless to say that the sliding door structure 80 according to the fourth embodiment of the present invention can be modified in the same manner as the sliding door structure 70 according to the third embodiment.

[Fifth embodiment]
Next, the configuration of the sliding door structure 90 according to the fifth embodiment of the present invention will be described with reference to FIGS. 13 to 15.

  The slide door structure 90 according to the fifth embodiment of the present invention is additionally provided with a strain sensor 34 as a support portion deformation detection means on the door hinge 26 of the slide door structure 10 according to the first embodiment of the present invention. The mounting position of the strain sensor 32 on the arm 20 is changed, and the control unit 40 is made to perform the processing of the flowchart shown in FIG. Hereinafter, the sliding door structure 90 according to the fifth embodiment of the present invention will be described only with respect to parts different from the sliding door structure 10 according to the first embodiment, and the same configuration as the sliding door structure 10 according to the first embodiment will be described. The description is omitted by using the same reference numerals.

  In the fifth embodiment of the present invention, the strain sensor 32 is the most distorted when the slide door 12 interferes with the obstacle 50 on the vehicle body side and the vehicle front side with respect to the longitudinal intermediate portion of the link arm 20 on the vehicle rear side. It is provided in the place where it grows. The strain sensor 32 outputs a signal corresponding to the amount and direction of deformation of the link arm 20 when the link arm 20 swings.

  On the other hand, the strain sensor 34 is disposed near the fixed shaft (hinge pin 28) of the door hinge 26 on the slide door 12 side of the link arm 18 on the vehicle front side. The strain sensor 34 outputs a signal corresponding to the deformation amount and the deformation direction of the door hinge 26.

  In the sliding door structure 90 according to the present embodiment, as shown in FIG. 13, strain sensors 32 and 34 are connected to the input side of the control unit 40, and on the output side of the control unit 40. The door drive motor 30 is wired.

  Next, the operation of the sliding door structure 90 having the above configuration will be described together with the operation thereof.

  When a door opening command signal is output from the control unit 40 to the door drive motor 30, the door drive motor 30 is driven to rotate in the door opening direction. Thereby, the link arm 20 rotates to the door rear side, and the slide door 12 slides to the vehicle rear side from the position which closes a door opening.

  In this way, when the slide door 12 interferes with the obstacle 50 as shown in FIG. 14A when the slide door 12 slides from the position where the door opening is closed to the vehicle rear side. The link arm 20 is bent and deformed toward the vehicle rear side, and the door hinge 26 is bent and deformed toward the vehicle inner side. Accordingly, the strain sensor 32 provided on the link arm 20 outputs a signal corresponding to the deformation amount and the deformation direction of the link arm 20, and the strain sensor 34 outputs a signal corresponding to the deformation amount and the deformation direction of the door hinge 26. To do.

  The control unit 40 includes an interference mode (pinch mode) between the sliding door 12 and the obstacle 50, a signal corresponding to the deformation amount and direction of the link arm 20 from the strain sensor 32, and the door hinge 26 from the strain sensor 34. The relationship with the signal corresponding to the deformation amount and the deformation direction is stored in advance. Then, when the control unit 40 inputs signals from the strain sensor 32 and the strain sensor 34 (step S31), the previously stored interference mode (sandwich mode) between the slide door 12 and the obstacle 50, the strain sensor 32, and the strain sensor. The relationship with the signal from 34 is read (step S32).

  Subsequently, the control unit 40 determines the strain sensor 32 and the strain based on the relationship between the interference mode (sandwich mode) between the slide door 12 and the obstacle 50 stored in advance and the signals from the strain sensor 32 and the strain sensor 34. Pattern matching is performed based on the signal from the sensor 32 to determine the interference mode between the sliding door 12 and the obstacle 50, and it is determined whether or not the sliding door 12 has interfered with the obstacle 50 has occurred (step S33).

  If it is determined that no pinching has occurred (step S33: NO), the process returns to step S31. On the other hand, if it is determined that the sliding door 12 has caught the obstacle 50 (step S33: YES), the door drive motor 30 is rotated by a predetermined amount in the door opening direction or is immediately stopped. The pinching of the slide door 12 is eliminated (step S34).

  In the above description, the case where the slide door 12 slides in the door opening direction has been described. However, the control unit 40 is also illustrated in FIG. 15 while the slide door 12 slides from the rear of the vehicle to the position where the door opening is closed. The processing of the flowchart is performed. That is, for example, as shown in FIG. 14B, when the slide door 12 interferes with the obstacle 50 when the slide door 12 slides in the door closing direction, the link arm 20 is bent and deformed forward of the vehicle. Then, a signal corresponding to the deformation amount and deformation direction of the link arm 20 is output from the strain sensor 32, and the door hinge 26 is bent and deformed inward of the vehicle, so that the deformation sensor 34 responds to the deformation amount and deformation direction of the door hinge 26. A signal is output.

  Then, the control unit 40 determines the strain sensor 32 and the strain sensor based on the relationship between the interference mode (the sandwiching mode) between the slide door 12 and the obstacle 50 stored in advance and the signals from the strain sensor 32 and the strain sensor 34. Pattern matching is performed based on the signal from 32 to determine the interference mode between the sliding door 12 and the obstacle 50. Then, when it is determined that the sliding door 12 has interfered with the obstacle 50, the door driving motor 30 is rotated by a predetermined amount in the door opening direction, or is immediately stopped to sandwich the sliding door 12. It is made to cancel (step S34).

  Thus, in the slide door structure 90 according to the present embodiment, the deformation sensor 32 directly detects the deformation amount and the deformation direction of the link arm 20 located closer to the slide door 12 than the door drive motor 30. Therefore, the time lag from the occurrence of pinching of the sliding door 12 to the pinching determination can be reduced as compared with the conventional configuration in which pinching determination is performed based on the current change of the motor. Thereby, it becomes possible to detect pinching of the slide door more quickly.

  Further, in the sliding door structure 90 according to the present embodiment, the deformation direction is used as a determination factor for occurrence of pinching in addition to the deformation amount when the link arm 20 swings. As a result, for example, the occurrence of pinching is determined in consideration of the deformation direction of the link arm 20 as compared to a configuration in which the occurrence of pinching is determined based only on the deformation amount when the link arm 20 swings. It becomes possible to detect pinching of the slide door 12 with higher accuracy.

  Further, by directly detecting the deformation amount and the deformation direction of the link arm 20 when the link arm 20 swings, it is possible to determine in what direction and to what extent the link arm 20 is deformed. Therefore, for example, whether or not the slide door 12 is pinched, such as the displacement position state of the slide door 12 when the pinch has occurred (the door tilted in a plan view of the vehicle), the input direction and the magnitude of the pinch load to the slide door 12, etc. It is possible to detect the pinching state without any interference.

  Further, in the slide door structure 90 according to the present embodiment, the deformation amount and the deformation direction of the door hinge 26 in addition to the deformation amount and the deformation direction when the link arm 20 swings are used as the determination factors for occurrence of pinching. Accordingly, for example, as compared to a configuration in which the occurrence of pinching is determined based only on the deformation amount and the deformation direction when the link arm 20 swings, the occurrence of pinching is determined in consideration of the deformation amount and the deformation direction of the door hinge 26. Therefore, it is possible to detect pinching of the slide door 12 with higher accuracy.

  Next, a modification of this embodiment will be described.

  In the above-described embodiment, the strain sensor 34 is provided on the door hinge 26 on the slide door 12 side. May be added.

[Sixth embodiment]
Next, the configuration of the sliding door structure 100 according to the sixth embodiment of the present invention will be described with reference to FIGS.

  In the sliding door structure 100 according to the sixth embodiment of the present invention, a strain sensor 38 as a supporting portion deformation detecting means is added to the hinge base 16 as a supporting portion of the sliding door structure 90 according to the fifth embodiment of the present invention. In addition, a strain sensor 36 as arm deformation detection means is additionally provided in the link arm 18 on the vehicle front side. Hereinafter, the sliding door structure 100 according to the sixth embodiment of the present invention will be described only with respect to the differences from the sliding door structure 90 according to the fifth embodiment, and the same configuration as the sliding door structure 90 according to the fifth embodiment will be described. The description is omitted by using the same reference numerals. In the sliding door structure 100 according to the sixth embodiment of the present invention, the control unit 40 is configured to perform the same processing as the control unit 40 of the sliding door structure 90 according to the fifth embodiment of the present invention. For the operation, refer to the flowchart shown in FIG.

  In the slide door structure 100 according to the sixth embodiment of the present invention, the strain sensor 36 is configured such that the slide door 12 interferes with the obstacle 50 on the vehicle body side and the vehicle front side with respect to the longitudinal intermediate portion of the link arm 18 on the vehicle front side. It is provided at the place where the distortion becomes the largest. The strain sensor 36 outputs a signal corresponding to the amount and direction of deformation of the link arm 18 when the link arm 18 swings.

  On the other hand, the strain sensor 38 is disposed near the fixed shaft (hinge pin 22) of the hinge base 16 with the vehicle body side of the link arm 18 on the vehicle front side. The strain sensor 38 outputs a signal corresponding to the deformation amount and deformation direction of the hinge base 16. The strain sensor 32 is provided on the vehicle rear side of the link arm 20.

  In the sliding door structure 100 according to the present embodiment, as shown in FIG. 16, strain sensors 32, 34, 36, and 38 are connected to the input side of the control unit 40 by wiring. A door drive motor 30 is wired to the output side.

  Next, the operation of the slide door structure 100 having the above configuration will be described together with the operation thereof.

  When a door opening command signal is output from the control unit 40 to the door drive motor 30, the door drive motor 30 is driven to rotate in the door opening direction. Thereby, the link arm 20 rotates to the door rear side, and the slide door 12 slides to the vehicle rear side from the position which closes a door opening.

  Thus, when the sliding door 12 interferes with the obstacle 50 as shown in FIG. 17A when the sliding door 12 is sliding from the position where the door opening is closed to the vehicle rear side, The link arm 20 is bent and deformed toward the vehicle rear side, and the door hinge 26 is bent and deformed toward the vehicle inner side. Further, the link arm 18 on the vehicle front side is compressed and deformed in the longitudinal direction, and the hinge base 16 is bent and deformed inward of the vehicle. At this time, the strain sensor 32 outputs a signal corresponding to the deformation amount and the deformation direction of the link arm 20, and the strain sensor 32 outputs a signal corresponding to the deformation amount and the deformation direction of the door hinge 26. The strain sensor 36 outputs a signal corresponding to the deformation amount and the deformation direction of the link arm 18, and the strain sensor 38 outputs a signal corresponding to the deformation amount and the deformation direction of the hinge base 16.

  The control unit 40 includes an interference mode (pinch mode) between the sliding door 12 and the obstacle 50, a signal corresponding to the deformation amount and direction of the link arm 20 from the strain sensor 32, and the door hinge 26 from the strain sensor 34. The relationship between the signal according to the deformation amount and the deformation direction, the signal according to the deformation amount and the deformation direction of the link arm 18 from the strain sensor 36, and the signal according to the deformation amount and the deformation direction of the hinge base 16 from the strain sensor 38. Is stored in advance. When the control unit 40 receives signals from the strain sensors 32, 34, 36, and 38 (step S 31), the previously stored interference mode (sandwich mode) between the slide door 12 and the obstacle 50 and each strain sensor 32 are stored. , 34, 36, and 38 are read (step S32).

  Subsequently, the control unit 40 determines each strain sensor based on the relationship between the interference mode (sandwich mode) between the slide door 12 and the obstacle 50 stored in advance and the signals from the strain sensors 32, 34, 36, and 38. Pattern matching is performed based on signals from 32, 34, 36, and 38 to determine the interference mode between the sliding door 12 and the obstacle 50, and it is determined whether or not the sliding door 12 has interfered with the obstacle 50. (Step S33).

  If it is determined that no pinching has occurred (step S33: NO), the process returns to step S31. On the other hand, if it is determined that the sliding door 12 has caught the obstacle 50 (step S33: YES), the door drive motor 30 is rotated by a predetermined amount in the door opening direction or is immediately stopped. The pinching of the slide door 12 is eliminated (step S34).

  In the above description, the case where the slide door 12 slides in the door opening direction has been described. However, the control unit 40 is also illustrated in FIG. 15 while the slide door 12 slides from the rear of the vehicle to the position where the door opening is closed. The processing of the flowchart is performed. That is, for example, as shown in FIG. 17B, when the slide door 12 interferes with the obstacle 50 when the slide door 12 slides in the door closing direction, each strain sensor 32, 34, 36, 38. A signal corresponding to the deformation amount and deformation direction of each part is output.

  Then, the control unit 40 determines each strain sensor based on the relationship between the interference mode (the sandwiching mode) between the slide door 12 and the obstacle 50 stored in advance and the signals from the strain sensors 32, 34, 36, and 38. Pattern matching is performed based on signals from 32, 34, 36, and 38, and the interference mode between the sliding door 12 and the obstacle 50 is determined. Then, when it is determined that the sliding door 12 has interfered with the obstacle 50, the door driving motor 30 is rotated by a predetermined amount in the door opening direction, or is immediately stopped to sandwich the sliding door 12. It is made to cancel (step S34).

  As described above, in the slide door structure 100 according to this embodiment, in addition to the deformation amount and the deformation direction when the link arms 18 and 20 swing, the deformation amount of the door hinge 26 on the slide door 12 side and the deformation amount of the hinge base 16 on the vehicle body side. In addition, the deformation direction is used as a determination factor for occurrence of pinching. Accordingly, for example, the deformation amount and the deformation direction of the door hinge 26 and the hinge base 16 are additionally considered as compared with the configuration in which the occurrence of the pinching is determined based only on the deformation amount and the deformation direction when the link arms 18 and 20 swing. Thus, the occurrence of pinching is determined, so that pinching detection of the slide door 12 can be performed with higher accuracy.

  Further, by directly detecting the deformation amount and the deformation direction of the link arms 18 and 20 when the link arms 18 and 20 swing, the link arms 18 and 20 in which part and in what direction and how much. Can be determined. Therefore, for example, whether or not the slide door 12 is pinched, such as the displacement position state of the slide door 12 when the pinch has occurred (the door tilted in a plan view of the vehicle), the input direction and the magnitude of the pinch load to the slide door 12, etc. It is possible to detect the pinching state without any interference.

  In addition, according to the slide door structure 100 according to the present embodiment, when the obstacle 50 is directly sandwiched between the link arms 18 and 20, the slide door structure 100 is sandwiched at a position away from the support portion of the link arms 18 and 20. It can also be determined whether or not there is. In other words, when only deformation of one link arm 20 is detected, the state of the other link arm 18 is not known, so whether the pinching load is directly input to the link arm 20 or through the slide door 12. Although it cannot be determined whether or not the load is input, it is determined whether the pinching load is directly input to the link arm 20 or the slide door 12 by providing the strain sensors 36 and 32 on the link arms 18 and 20. It becomes possible to do. Thereby, pinching erroneous detection can be prevented.

  Further, according to the slide door structure 100 according to the present embodiment, the strain sensors 36 and 32 are provided on the link arms 18 and 20 to detect the deformation amount and the deformation direction, thereby inputting the pinching load to the slide door 12. (The position of the obstacle 50 with respect to the slide door 12, whether the load input direction is forward or backward with respect to the link arms 18 and 20, etc.) can be detected. As a result, it is possible to take appropriate measures for eliminating the pinching according to the pinching mode.

  Next, a modification of this embodiment will be described.

  In the above-described embodiment, the strain sensors 32, 34, 36, and 38 are provided on the link arms 18 and 20, the door hinge 26, and the hinge base 16, respectively. However, each of the strain sensors 32, 34, and Of course, various combinations of the attachments 36 and 38 can be changed.

  For example, a position combination in which strain sensors 36 and 38 are provided on the link arm 18 and the hinge base 16 may be used. Moreover, it is good also as a position combination by which the strain sensors 36 and 32 are provided in the link arms 18 and 20, respectively.

  When the vehicle body side connecting shaft of the link arm 18 on the front side of the vehicle is swung by the door drive motor 30, a combination of positions in which the strain sensor 36 is provided on the link arm 18 and the strain sensor 34 is provided on the door hinge 26, or A position combination in which the strain sensor 36 is provided on the link arm 18 and the strain sensor 38 is provided on the hinge base 16 may be employed.

FIG. 1 is a diagram showing a configuration of a sliding door structure according to a first embodiment of the present invention. FIGS. 2A and 2B are views showing a state of occurrence of pinching in the slide door structure according to the first embodiment of the present invention. FIG. 2A is a view when the door is opened, and FIG. 2B is a view showing a state when the door is closed. FIG. 3 is a diagram showing the relationship between the strain detection value by the strain sensor according to the first embodiment of the present invention and the elapsed time. FIG. 4 is a flowchart showing the flow of operation of the sliding door structure according to the first embodiment of the present invention. FIG. 5 is a diagram showing the configuration of the sliding door structure according to the second embodiment of the present invention. FIG. 6A is a diagram showing the relationship between the strain detection value by the strain sensor according to the second embodiment of the present invention and the elapsed time, and FIG. 6B is a diagram showing the relationship between the rotational speed of the door drive motor and the elapsed time. (C) is a figure which shows the relationship between the pulsating distortion detection value and elapsed time. FIG. 7 is a flowchart showing a flow of operations of the sliding door structure according to the second embodiment of the present invention. Fig.8 (a) is a figure which shows the structure of the sliding door structure which concerns on 3rd embodiment of this invention, (b) is a principal part enlarged view of (a). FIGS. 9A and 9B are views showing the occurrence of pinching in the sliding door structure according to the third embodiment of the present invention. FIG. 9A shows the state when the door is opened, FIG. 9B shows the state when the door is closed, and FIG. It is a figure which shows a mode that the wind is blowing on the door. FIG. 10 is a flowchart showing a flow of operation of the sliding door structure according to the third embodiment of the present invention. FIG. 11 is a diagram showing a configuration of a sliding door structure according to the fourth embodiment of the present invention. FIGS. 12A and 12B are views showing the occurrence of pinching in the sliding door structure according to the fourth embodiment of the present invention, where FIG. 12A is a view when the door is opened, and FIG. 12B is a view showing the state when the door is closed. FIG. 13 is a view showing a configuration of a sliding door structure according to the fifth embodiment of the present invention. FIGS. 14A and 14B are views showing the occurrence of pinching in the sliding door structure according to the fifth embodiment of the present invention. FIG. 14A is a view when the door is opened, and FIG. 14B is a view showing the state when the door is closed. FIG. 15 is a flowchart showing an operation flow of the sliding door structure according to the fifth embodiment of the present invention. FIG. 16 is a diagram showing the configuration of the sliding door structure according to the sixth embodiment of the present invention. FIGS. 17A and 17B are views showing the occurrence of pinching in the sliding door structure according to the sixth embodiment of the present invention. FIG. 17A is a view when the door is opened, and FIG. 17B is a view showing the state when the door is closed.

Explanation of symbols

10, 60, 70, 80, 90, 100 Sliding door structure 12 Sliding door 16 Hinge base (supporting part)
18, 20 Link arm 26, 44 Door hinge (support)
30 Door drive motor (drive means)
32, 36 Strain sensor (arm deformation detection means)
34, 38 Strain sensor (support portion deformation detection means)
40 Control unit (pinch determination means)
42 Rotation sensor (speed detection means)
50 obstacles

Claims (7)

A link arm whose one end is rotatably connected to the vehicle body;
A slide door that is rotatably attached to the other end side of the link arm, and that opens and closes a door opening provided in a vehicle body by swinging the link arm;
Arm deformation detection means for outputting a signal corresponding to the deformation of the link arm;
Pinching determination means for determining interference between the sliding door and an obstacle based on a signal output from the arm deformation detection means;
A sliding door structure characterized by comprising: The sliding door is configured to open and close the door opening by swinging a plurality of the link arms,
Each of the plurality of link arms is provided with the arm deformation detection means,
2. The sliding door structure according to claim 1, wherein the pinching determination unit determines interference between the sliding door and an obstacle based on signals output from the plurality of arm deformation detection units. The arm deformation detection means outputs a signal corresponding to the deformation amount and deformation direction of the link arm,
The sliding door structure according to claim 1 or 2, wherein the pinching determination unit determines interference between the sliding door and an obstacle based on a signal output from the arm deformation detection unit. Drive means for swinging the link arm;
Speed detecting means for outputting a signal corresponding to the driving speed of the driving means;
With
2. The pinching determination means determines interference between the sliding door and an obstacle based on a signal output from the arm deformation detection means and a signal output from the speed detection means. The sliding door structure according to claim 3. A supporting portion deformation detecting means for outputting a signal corresponding to the deformation of the supporting portion of the link arm in the vehicle body or the sliding door;
The pinching determination means determines interference between the sliding door and an obstacle based on a signal output from the arm deformation detection means and a signal output from the support section deformation detection means. The sliding door structure according to any one of claims 1 to 3. The support part deformation detection means outputs a signal corresponding to a deformation amount and a deformation direction of a support part of the link arm in the vehicle body or the slide door,
The pinching determination means determines interference between the sliding door and an obstacle based on a signal output from the arm deformation detection means and a signal output from the support section deformation detection means. 5. A sliding door structure according to 5. Drive means for swinging the link arm;
Speed detecting means for outputting a signal corresponding to the driving speed of the driving means;
With
The sandwiching judging means is configured to determine whether the sliding door and the obstacle are based on a signal output from the arm deformation detecting means, a signal output from the speed detecting means, and a signal output from the support part deformation detecting means. The sliding door structure according to claim 5 or 6, wherein interference is determined.

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