JP2002004714A - Pinching judging device and switchgear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that an impact on a pinched object cannot be made smaller because pinching cannot be judged depending on the position wherein the object is pinched in a conventional pinching judging device and a conventional switchgear. SOLUTION: A piezoelectric sensor 5 is disposed in a sliding door 1 in such a manner as to be folded back. Consequently, such an effect is brought about that the generation of the pinching can be accurately judged by a judging means 7 because even the object 10 inside a vehicle 3 comes into contact with the piezoelectric sensor 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pinch judging device and an opening / closing device for judging whether or not an object is pinched when an opening / closing portion closes an opening. The present invention relates to a safety device for an electric window such as a door, a power window, and an electric sunroof.

[0002]

2. Description of the Related Art Conventional pinch determination devices and open / close devices are disclosed, for example, in Japanese Patent Application Laid-Open No. 10-264652 and
There is one disclosed in Japanese Patent Application Publication No. 1-222036.
This is a device in which pressure-sensitive means are disposed at the vertical end in the closing direction of the slide door in order to detect the entrapment between the opening of the vehicle body and the slide door. A pressure-sensitive switch with the electrodes facing each other was used. When an object is sandwiched between the body opening and the slide door, the electrodes of the pressure-sensitive switch come into contact with each other due to the pressing by the contact of the object and the pressure-sensitive switch is turned on to detect the entrapment.

[0003]

However, the conventional pinch determination device and open / close device have the following problems.

Japanese Unexamined Patent Publication Nos. Hei 10-264652 and Hei 11-223636 disclose an apparatus for judging a sliding door of an automobile and an opening / closing apparatus, which are basically shown in FIGS. It is such a configuration. Each shows a cross section of the vehicle body and the vertical end of the slide door. FIG. 13 shows a state in which the slide door is opened. When the slide door is closed, the slide door moves along a path indicated by an arrow 53. FIG.
Is a state in which the slide door is closed, and the vehicle body 2 and the slide door 1 are brought into close contact with each other by the seal portion 11. The pressure-sensitive switch 54 is fixed to the slide door 1 in order to detect entrapment of an object. However, the pressure-sensitive switch 54 is spaced apart from the vehicle body 2 in a state where the slide door 1 is closed to prevent erroneous detection. I have. The pressure-sensitive switch 54 has a pair of electrodes 56 and 57 on both sides of a gap 55. For example, when the object 10 in the external region is sandwiched as shown in FIG. Are brought into contact with each other, and pinching can be reliably detected. Similarly, it is considered that entrapment can be detected for an object that extends from the outer region to the inner region.

[0005] However, in the conventional example, when the object 10 in the inner area is sandwiched as shown in FIG.
Is not in contact with the pressure-sensitive switch 54, and it is conceivable that the jamming cannot be determined. For example, if a weak small object such as a finger or a foot of a child sitting in a seat is caught, a considerable impact is given.

SUMMARY OF THE INVENTION The present invention is to solve such a conventional problem, and it is possible to reliably determine not only an object in an external region but also an object in an internal region and reduce an impact on the object. It is an object to provide a switchgear.

[0007]

According to a first aspect of the present invention, there is provided a pinch determination device and an opening / closing device according to the present invention, wherein an opening portion, an opening / closing portion for opening / closing the opening portion, and an internal space defined by closing the opening / closing portion are provided. A region and an external region, the opening and the opening / closing portion are disposed in at least one of the opening portion and the opening / closing portion, and the object in the internal region is sandwiched between the opening portion and the opening / closing portion; A sensor that generates an output in any case when the object is sandwiched between the unit and the opening / closing part; and a determination unit that determines whether or not the object is jammed based on the output of the sensor. .

According to the above-mentioned invention, since the sensing means generates an output regardless of whether an object in the inner area is pinched or an object in the outer area, pinching can be reliably determined in any pinch.

[0009]

According to a first aspect of the present invention, there is provided an entrapment determining apparatus, comprising: an opening; an opening / closing unit for opening and closing the opening; an inner region and an outer region separated by closing the opening / closing unit; When the object in the internal area is interposed between the opening and the opening / closing section, the object in the external area is disposed between at least one of the opening and the opening / closing section. It is provided with sensing means for generating an output in any case in which the object is sandwiched between the elements, and determining means for determining the presence or absence of the entrapment based on the output of the sensing means.

[0010] Since the sensing means generates an output regardless of whether an object in the inner area is pinched or an object in the outer area is pinched, the pinching can be reliably determined in any pinching.

According to a second aspect of the present invention, the pinching determination device is configured to generate an output in any case by folding back a long sensing unit and arranging the sensing unit in the inner region and the outer region. I have.

[0012] Then, the entrapment can be reliably determined in any entrapment by the sensing means on the inner area side and the outer area side, and the number of sensing means does not need to be increased.

According to a third aspect of the present invention, in the pinch determination device, the sensing means is a cable-shaped piezoelectric sensor.

The diameter of the cable-shaped piezoelectric sensor can be smaller than that of the pressure-sensitive switch.
Since there is no possibility of malfunction due to folding (in the case of a pressure-sensitive switch, erroneous contact), it can be folded back with a small radius of curvature even in a narrow space.

According to a fourth aspect of the present invention, the pinching determination device is configured to generate an output in any case by arranging a wide-width sensing means over the inner area and the outer area. And

[0016] By using the sensing means on the inner area side and the outer area side, it is possible to reliably determine the entrapment in any entrapment, and it is not necessary to increase the number of sensing means.

In the pinching determination device according to a fifth aspect of the present invention, the sensing means is a sheet-like piezoelectric sensor.

The sheet-shaped piezoelectric sensor can be made extremely thinner than the pressure-sensitive switch, and can be processed into various shapes, so that the structure can be easily formed between the internal region and the external region. .

The pinch determination device according to claim 6 of the present invention has a first sensing means for the inner area and a second sensing means for the outer area, and generates an output in any case. It has a configuration.

Further, since each sensing means is provided corresponding to the region, it is possible to reliably determine the entrapment in any entrapment.

According to a seventh aspect of the present invention, in the entrapment judging device, when the first sensing means and the second sensing means generate outputs at the same time, the entrapment is judged to be completely closed rather than the entrapment. It is configured to determine.

Further, it is possible to have a function of judging closure which is difficult with only one sensing means.

According to an eighth aspect of the present invention, there is provided an entrapment determination apparatus, comprising: an entrapment determination apparatus according to any one of the first to seventh aspects, a driving unit for driving an opening / closing unit, and the entrapment determination apparatus. Control means for controlling the driving means, the control means stops the movement of the opening / closing section or the moving direction And the driving means is controlled to move in the opening direction by inverting.

[0024] Since the entrapment can be stopped or released by judging the entrapment, the impact on the interposed object can be reduced and a safe opening / closing device can be obtained.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) The invention of Embodiment 1 will be described with reference to FIGS.

FIGS. 1 and 2 are block diagrams of a pinch determination device and an opening / closing device according to the first embodiment, and show a case where the invention is applied to a sliding door 1 of an automobile as an opening / closing portion. FIG. 1 shows the sliding door 1 viewed from the inside of the vehicle, and FIG. 2 shows an external configuration of an automobile on which the sliding door 1 is mounted. A sliding door 1 as an opening / closing part is configured to be freely openable and closable with respect to a vehicle body 2 forming an opening. At the vertical end of the slide door 1, a cable-shaped piezoelectric sensor 5 as a sensing means is disposed by being folded back at the upper part. 6 is an elastic body for fixing the piezoelectric sensor 5 to the slide door 1;
Is a judging means for judging whether or not an object is caught between the slide door 1 and the vehicle body 2 based on the output signal of the piezoelectric sensor 5. The drive means 8 for opening and closing the slide door 1 is controlled by a signal from the control means 9 to operate the slide door 1.
Can be driven in the opening direction, driven in the closing direction, or stopped.

In this embodiment, the slide door 1, the body 2 forming the opening, the piezoelectric sensor 5, and the determination means 7 are defined as a pinch determination device by generating a determination output when an object is pinched. Then, a combination of the driving means 8 and the control means 9 is defined as an opening / closing device by changing or stopping the moving direction of the slide door 1 based on the determination output.

FIGS. 3 and 4 are cross-sectional views taken along the line AA 'of FIG. 2, and correspond to FIGS. 13 to 16 of the conventional example. FIG. 3 shows a case where the object 10 in the vehicle 3 is sandwiched, and FIG. 4 shows a case where the slide door 1 is normally closed. Reference numeral 11 denotes a seal portion for bringing the vehicle body into close contact with the slide door when the slide door 1 is closed.

In FIG. 3, the object 10 is about to be sandwiched between the slide door 1 and the vehicle body 2, but one piezoelectric sensor is folded back at the upper part, so that the piezoelectric sensor 5a inside the vehicle 3 and the piezoelectric sensor 5 outside the vehicle 4 side. The object 10 is arranged as the sensor 5b.
Comes into contact with the piezoelectric sensor 5a via the elastic body 6, and gives a pressing force and a displacement. In general, a piezoelectric sensor generates an output in accordance with a given pressing force or displacement, so that in FIG. 3, the piezoelectric sensor 5a generates an output and can determine that pinching has occurred. Although not shown, outside the vehicle 4
When the object on the side is pinched, the pinching can be similarly determined by the piezoelectric sensor 5b, and for an object extending from the inside of the vehicle to the outside of the vehicle, the pinching can be determined by any of the piezoelectric sensors 5a and 5b.

In this embodiment, when the slide door 1 is normally closed as shown in FIG.
Since a and b do not touch anything, no output is generated, and no erroneous determination of entrapment occurs.

FIG. 5 is a configuration diagram of the piezoelectric sensor 5. The piezoelectric sensor 5 has a coaxial cable-like configuration in which a composite piezoelectric layer 12 as a piezoelectric material, and a center electrode 13 and an outer electrode 14 as electrodes sandwiching the composite piezoelectric layer 12 are concentrically laminated and formed. In addition, a protective coating layer 15 is provided on the outermost layer, and the overall configuration is extremely flexible. The piezoelectric sensor 5 is manufactured by the following steps. First, chlorinated polyethylene sheet and (40-70) vol%
Piezoelectric ceramics (here, lead zirconate titanate)
The powder is uniformly mixed into a sheet by a roll method. After the sheet is finely cut into pellets, these pellets are continuously extruded together with the center electrode 13 to form the composite piezoelectric layer 12. Then, the outer electrode 14 is wound around the composite piezoelectric layer 12. Outer electrode 14
, The coating layer 15 is also continuously extruded. Finally, in order to polarize the composite piezoelectric layer 12, the center electrode 13
A high DC voltage of (5 to 10) kV / mm is applied between the first electrode and the outer electrode 14.

As the chlorinated polyethylene sheet, a mixture of amorphous chlorinated polyethylene and crystalline chlorinated polyethylene is used. In this case, extrudability, flexibility,
75% by weight of amorphous chlorinated polyethylene having a molecular weight of 60,000 to 150,000, crystallinity (15 to 25)
It has been experimentally found that a chlorinated polyethylene in which 25% by weight of a crystalline chlorinated polyethylene having a molecular weight of 200,000 to 400,000 is mixed at 25% by weight. The mixed chlorinated polyethylene can contain up to about 70 vol% piezoceramic powder.

When the piezoelectric ceramic powder is added to the mixed chlorinated polyethylene, it is preferable that the piezoelectric ceramic powder is immersed in a solution of a titanium coupling agent and dried in advance. By this treatment, the surface of the piezoelectric ceramic powder is covered with the hydrophilic groups and the hydrophobic groups contained in the titanium coupling agent. The hydrophilic group prevents aggregation of the piezoelectric ceramic powder, and the hydrophobic group increases the wettability between the mixed chlorinated polyethylene and the piezoelectric ceramic powder. As a result, the piezoelectric ceramic powder is evenly mixed in the mixed chlorinated polyethylene,
A large amount can be added up to 70 vol%. Instead of immersion in the above-mentioned titanium coupling agent solution, it was found that the same effect as described above was obtained by adding the titanium coupling agent at the time of rolling the mixed chlorinated polyethylene and the piezoelectric ceramic powder. . This treatment is excellent in that no special immersion treatment in a titanium coupling agent solution is required.

As the center electrode 13, a normal metal single wire may be used, but here, an electrode in which a metal coil 17 is wound around an insulating polymer fiber 16 is used. As the insulating polymer fiber 16 and the metal coil 17, 5 wt% of polyester fiber and silver which are commercially used in an electric blanket are used.
Copper alloys are preferred.

The outer electrode 14 has a configuration in which a band-shaped electrode having a metal film adhered on a polymer layer is wound around the composite piezoelectric layer 12. And, as the polymer layer, polyethylene terephthalate (PET) is used,
An electrode having an aluminum film adhered thereon has high thermal stability at 120 ° C. and is commercially mass-produced. When connecting this electrode to the determination means 7, it is difficult to solder the aluminum film, so the connection is made by caulking or eyelets, for example. Further, a configuration may be adopted in which a metal single-wire coil or a metal braid is wound around the aluminum film of the outer electrode 14 to establish conduction with the aluminum film, and the metal single-wire coil or the metal braid is sandwiched and soldered to the judging means 7. Since attachment is possible, work efficiency can be improved. It is preferable that the outer electrode 14 be wound around the composite piezoelectric layer 12 so as to partially overlap with each other in order to shield from electric noise in an external environment.

The covering layer 15 is made of an elastic material such as rubber, which is more flexible and flexible than the composite piezoelectric layer 12, so that the piezoelectric sensor 5 is easily deformed when pressed by sandwiching an object. It is preferable to select in consideration of heat resistance and cold resistance, and specifically, to select a material at -30 ° C to 85 ° C with little decrease in flexibility. As such rubber, for example, ethylene propylene rubber (EPDM), chloroprene rubber (CR), butyl rubber (IIR), silicon rubber (Si), thermoplastic elastomer, or the like may be used.

With the above configuration, the minimum curvature of the piezoelectric sensor 5 can be increased to a radius of 5 mm. In the present embodiment, one piezoelectric sensor 5 is folded back at the upper part of the slide door 1, but the thickness of the slide door 1 is several cm, which is sufficient as a space for folding the piezoelectric sensor 5.

In the present embodiment, the covering layer 15 and the elastic body 6 are formed as separate components. However, the present invention is not limited to this, and may be formed as a single component. In this case, there is an effect of reducing parts.

FIG. 6 is a block diagram of the judging means 7. The output of the piezoelectric sensor 5 includes an impedance conversion unit 18 composed of an input resistor and an FET, and a filter 1 having a cutoff frequency set so as to remove noise and extract only a signal.
9. Amplifier 2 that amplifies signals to a level that is easy to handle
0, a comparing section 21 for determining the entrapment by comparing with a reference signal, and the like, and the control section 9 is notified of an output for judging whether or not an entrapment has occurred. In general, the output impedance of a piezoelectric sensor is high, and the greater the variation in connection, the greater the variation in signal level in subsequent signal processing circuits. It is also conceivable that it is vulnerable to noise. Therefore, first, it is connected to the impedance conversion unit 18 to convert the impedance to a low impedance.

In the case of this embodiment, the piezoelectric sensor 5 is folded back, so that both ends can be brought to the judging means 7. Therefore, unlike FIG. 6, it is possible to connect the first end of the piezoelectric sensor 5 to the impedance conversion unit 18 and connect the second end of the piezoelectric sensor 5 to the filter 19. That is, the piezoelectric sensor 5 can be inserted between the impedance conversion unit 18 and the filter 19 in FIG. In this case, since the free end of the piezoelectric sensor 5 does not exist, there is an effect that it is not necessary to take measures such as short-circuiting of the electrode at the free end and contact with other components.

A strong electric field countermeasure may be taken by adding a feedthrough capacitor, an EMI filter or the like to the input / output section of the determination means 7.

FIG. 7 shows the output signal V of the filter 19, the output J of the comparator 21 which can also be called the output of the judging means 7, and the control means 9
FIG. 6 is a characteristic diagram showing an applied voltage Vm for providing a drive signal to the drive means 8. At time t1, a voltage of + Vd is applied to the driving means 8 to move the slide door 1 in the closing direction. When the object 10 is sandwiched between the vehicle body 2 and the sliding door 1, the piezoelectric sensor 5 outputs a signal corresponding to the second derivative (acceleration) with respect to the time of the displacement applied to the piezoelectric sensor 5 by the piezoelectric effect (see FIG. 7). (Signal component larger than reference potential Vo)
Is output. At this time, if the piezoelectric sensor 5 is simply arranged, the deformation of the piezoelectric sensor 5 when sandwiched is small (depending on the hardness of the slide door 1). 5 is disposed on the slide door 1 via the elastic body 6. Thereby, the elastic body 6 is compressed at the time of pinching, and the displacement of the piezoelectric sensor 5 increases.
As described above, a large displacement is obtained in the piezoelectric sensor 5, and the acceleration, which is the second derivative value of the displacement, also increases. As a result, the output signal of the piezoelectric sensor 5 also increases. This makes it easier to distinguish between the signal component at the time of pinching and the signal component due to external vibration or electric noise.

The determination means 7 determines the amplitude | V−V of V from Vo.
If o | is equal to or greater than the predetermined value Do, it is determined that entrapment has occurred, and at time t2, a pulse signal Lo → Hi → Lo is output as a determination output. When there is this pulse signal, the control means 9 stops the application of the voltage of + Vd to the driving means 8, and the control means 9 outputs -Vd
Is applied for a certain period of time to move the slide door 1 in the opening direction by a certain amount to release the entrapment. At the time of releasing the entrapment, a signal corresponding to the acceleration at which the displacement is restored from the piezoelectric sensor 5 (a signal component smaller than the reference potential Vo in FIG. 7).
Is also output.

At the time of pinching, whether V becomes larger or smaller than Vo depends on the bending direction of the piezoelectric sensor 5 at the time of pinching,
It depends on the polarization direction, the electrode allocation (which is the reference potential), and the direction in which the piezoelectric sensor 5 is supported, but since the determination means 7 determines the entrapment based on the amplitude of V from Vo, V Entrapment can be determined regardless of the size.

In this embodiment, it is determined that the object has been caught when the output exceeds a predetermined value. However, when the object is soft, the output level is lowered, and instead, the time constant of the output change is increased. Can be assumed. Therefore, the determination may be made based on the integrated value of the output, or the determination threshold may be changed according to the rate of change. In this case, the accuracy of the determination can be increased by further preventing leakage of the determination.

In this embodiment, the driving means 8 moves the slide door 1 in the opposite direction when there is a signal of pinching while the slide door 1 is moving in the closing direction. In this state, it is known that a signal corresponding to the acceleration at which the displacement is restored is generated from the piezoelectric sensor 5 even at the moment when the slide door 1 is moved in the opening direction (that is, at the moment when the pinching is released). Other determination methods utilizing this can be considered. For example, if the amplitude | V−Vo | is equal to or greater than the predetermined value Do, the slide door 1 is moved in the opening direction by a very small amount, and if a reverse signal corresponding to the acceleration at which the displacement is restored at this time is generated, the slide door 1 is really pinched. It is determined that there is a slide door 1
Is moved further in the opening direction. If the sliding door 1 is moved in the opening direction by a very small amount and no signal in the opposite direction according to the acceleration at which the displacement is restored is generated, it is determined that there is no entrapment, and the sliding door 1 is again determined.
Is moved in the closing direction. With this method, if the object is not pinched, but just touched or pulled out instantaneously, it can continue to move in the closing direction, which has the effect of preventing erroneous detection and excessive judgment. is there.

There is a method of using a position sensor for detecting the position of the slide door 1 and ignoring the output for judging entrapment when the position is almost fully open. Since the object is actually trapped after the sliding door 1 has been closed to some extent, it is unlikely that it is dangerous even if the signal of the trapping is output only by, for example, moving 1 cm from the fully opened state. The range of the position to be determined may be determined while giving maximum consideration to safety. This method also has the effect of preventing erroneous detection and excessive determination.

(Embodiment 2) Embodiment 2 will be described with reference to FIGS.

This embodiment shows a case in which the entrapment determination device is applied to a sunroof of an automobile. FIG. 8 is an external view of the roof of the automobile viewed from above. FIG. 9 is a configuration diagram showing a cross section taken along line BB ′ of FIG. The sunroof has a sliding roof 22 as an opening / closing section and a roof frame 23 forming an opening. Elastic body 24, sheet-like piezoelectric sensor 25, rigid body 2
6, the seal portion 27 is configured. The piezoelectric sensor 25 is formed in a sheet-like and wide shape, and is disposed so as to cover the inside 3 side and the outside 4 side of the vehicle when viewed from the sliding roof 22. Here, when the sliding roof 22 moves in the closing direction as indicated by an arrow 28, an object may be sandwiched between the sliding roof 22 and the roof frame 23. Since both the object inside the vehicle 3 and the object outside the vehicle 4 come into contact with one of the parts 25a and 25b of the piezoelectric sensor 25, the contacted part is deformed together with the elastic body 24 to generate an output. Therefore, it is possible to reliably determine the entrapment.

Further, the part 25c is a roof frame 2 made of a rigid body.
3 and is held between the rigid body 26 and does not cause displacement even when the sliding roof 22 is normally closed and comes into contact with the seal portion 27.

FIG. 10 is a structural view of a sheet-like piezoelectric sensor 25 of the present embodiment.
0 and 31 are formed. When high-temperature durability is not required, it can be easily implemented by using PVDF (polyvinylidene fluoride film) or the like as the piezoelectric sheet 29. In FIG. 9, the piezoelectric sensor 25 of FIG. 10 is curved and attached by bonding or the like.

In the case of the sheet-shaped piezoelectric sensor as in the present embodiment, the dimension in the width direction and the dimension in the length direction have a degree of freedom, and it is easy to bend and can be attached to a member having a complicated shape. Can be.

(Embodiment 3) Embodiment 3 is shown in FIGS.
This will be described with reference to FIG.

This embodiment shows a case where the pinch determination device is applied to a power window of an automobile. FIG. 11 is an external view of the right door viewed from the inside of the vehicle. FIG. 12 is a configuration diagram showing a cross section taken along line CC ′ of FIG.

In the case of this embodiment, a window glass 32 as an opening / closing portion and a window frame 33 forming an opening are provided. Two pressure-sensitive switches 34 and 35 are arranged on the upper edge of the window frame 33 as sensing means. A pressure-sensitive switch 34, which is first sensing means for inside the vehicle, and a pressure-sensitive switch 35, which is second sensing means for outside the vehicle.

A reference numeral 36 designates a space between the window frame 33 and the window glass 32 (mainly the vehicle interior 3) based on the conduction state of the pressure-sensitive switch 34.
Is a judging means for judging whether or not an object has been caught between the window frame 33 and the window glass 32 based on the conduction state of the pressure-sensitive switch 35. It is.

Further, a motor 38 as a driving means for opening and closing the window glass 32 and a rotation speed sensor 39 as a load detecting means for detecting a driving load of the motor 38 are provided. The overload judging means 40 compares the detection value of the rotation speed sensor 39 with a predetermined value, and when the detection value of the rotation speed sensor 39 falls below the predetermined value, the driving load exceeds the predetermined value. That is, an overload signal is output assuming that there is a pinch. Therefore, the pressure-sensitive switch 3
The pinching is determined based on the output of any one of the rotation speed sensors 4 and 35 and the rotation speed sensor 39. The pinching determination device 41 is formed by the above configuration.

Next, the control means 42 will be described. The main circuit 43 gives a signal to the motor drive circuit 44 to control the motor 38, but conversely, the window glass 32 moves in the closing direction from the motor drive circuit 44 (the motor 38 rotates forward).
It is a configuration that receives a signal as to whether or not it is running. In the main circuit 43, the window glass 32 is moved in the closing direction by the motor drive circuit 44 (the motor 38 rotates forward), and an object is pinched by any of the determination units 36 and 37 and the overload determination unit 40. In this case (with exceptions), the motor 38 is rotated in the reverse direction to reverse the moving direction of the window glass 32 and move in the opening direction, and the pinching can be eliminated more quickly as described above.

An exception is the case where the pressure-sensitive switches 34 and 35 are simultaneously turned on. In the case of normal pinching, either of them conducts first, whereas in the case of simultaneous pinching, it is determined that the pinch is completely closed, not pinching, so that the window glass 32 is stopped and not reversed. To control. This will be described with reference to FIG. The pressure-sensitive switches 34 and 35 are held in the weather strip 45, and when the window glass 32 is normally closed, the window glass 32 pushes the thin portion 46 and greatly deforms the tip portions 47 and 48 to forcibly. As a result, the pressure-sensitive switches 34 and 35 are simultaneously turned on. The pressure-sensitive switches 34 and 35 are provided with internal voids 49 and 5.
In a configuration having four electrodes 51 and 52 around 0, conduction occurs when any two of the four electrodes come into contact with each other.

Accordingly, when the pressure-sensitive switches 34 and 35 are simultaneously turned on, it can be determined that the switches are normally closed.

Returning to FIG. 11, the main circuit 43 receives an operation signal from an operation switch 53 for instructing the occupant to open and close the window glass 32, and normally operates the motor drive circuit 44 in accordance with the operation signal. Let it. Reference numeral 54 denotes a battery for supplying electric power to the main circuit 43, the motor drive circuit 44, and the like (and, in some cases, to the judging means 36, 37 and the overload judging means 40).

In this embodiment, the judgment means 36, 3
7. Although at least one of the overload judging means 40 judges that the window glass 2 is lowered when judging the entrapment, another method is used when the characteristics (especially sensitivity) and noise of the sensing means used are large. Is also conceivable. For example, if both the sensitivity of the sensing means and the sensitivity of the overload determination are too good, it is determined that the jamming has really occurred only when one of the determination means 36 and 37 and the overload determination means determine the jamming. Good.

Further, if the sensing means is arranged as shown in FIG. 9 instead of FIG. 12 so that the sensing means does not output when the door is normally closed, the judging means 36 and 37 can judge whether or not the pinching has occurred. Only when it is judged that there is no overload,
The motor 38 may be stopped when it is determined that the window glass 2 is normally closed instead of being pinched.

Some window frames of automobiles have side visors. In this case, it is conceivable that an object is sandwiched between the side visor and the window glass,
The sensing means may be arranged on the side visor, or the sensing means may be arranged on the window glass side.

In the above-described embodiment, the case where the sensing means is arranged on the opening / closing part and the case where the sensing means is arranged on the opening side are shown. It should be selected appropriately.

In the above embodiment, the case where the present invention is applied to a sliding door, a sunroof, and a power window of a car has been described. However, the present invention may be applied to, for example, a power seat. It may be applied to an automatic door, or to a shutter of a garage or a store. The present invention can be applied as long as the area is distinguished by the opening / closing part.

[0068]

As is apparent from the above embodiment, according to the first aspect of the present invention, the case where the object in the inner region is sandwiched between the opening and the opening / closing portion, and the case where the object in the outer region is located between the opening and the opening. In any case of being sandwiched between the opening and closing unit, the sensing means generates an output to determine the presence or absence of the jamming, so that there is an effect that a reliable jamming determination without any omission can be made in any jamming.

According to the second aspect of the present invention, in addition to the first aspect of the present invention, the long sensing means is folded back and disposed on the inner area side and the outer area side, so that the entrapment can be reliably performed in any entrapment. In addition to the determination, there is an effect that the number of sensing means does not need to be increased. Therefore, the number of determination means does not need to be increased, and there is an effect of preventing the control from becoming complicated.

According to the invention of claim 3 of the present invention, in addition to the invention of claim 2, since the sensing means is a cable-shaped piezoelectric sensor, the diameter can be made smaller than that of the pressure-sensitive switch. Since there is no risk of malfunction due to folding (incorrect contact with a pressure-sensitive switch), there is an effect that even a narrow space can be folded and disposed with a small radius of curvature. Specifically, it is necessary to bend so as to fit in the thickness of the opening and the opening / closing section, but there is no problem.

According to the fourth aspect of the present invention, in addition to the first aspect of the present invention, since the wide-width sensing means is disposed over the inner area side and the outer area side, it is ensured in any sandwiching. Can be determined, and the same effect as in claim 2 can be obtained without increasing the number of sensing means.

According to the invention of claim 5 of the present invention, in addition to the invention of claim 4, since the sensing means is a sheet-like piezoelectric sensor, it can be made extremely thinner than a pressure-sensitive switch. Since it can be processed into a simple shape, there is an effect that the structure can be easily formed between the inner region side and the outer region side. Specifically, it is necessary to process according to the shape of the opening and the end of the opening / closing part, but there is no problem.

According to the invention of claim 6 of the present invention, an output is generated in any case by having the first sensing means for the inner area and the second sensing means for the outer area. Therefore, there is an effect that the invention of claim 1 can be easily realized.

According to the invention of claim 7 of the present invention, in addition to the invention of claim 6, when the first sensing means and the second sensing means generate outputs at the same time, the judging means performs Since it is configured to determine that the shutter is completely closed without any sensor, there is an effect that it is possible to have a function of determining the shutdown which is difficult with only one sensing unit. Specifically, there is an effect that it is not necessary to have another means for detecting the position of the opening / closing section.

According to an eighth aspect of the present invention, in addition to any one of the first to seventh aspects, when the entrapment determination device determines that entrapment is present while the opening / closing part is moving in the closing direction, Since the movement of the opening / closing unit is stopped or the movement direction is reversed so that the opening / closing unit moves in the opening direction, the impact on the sandwiched object can be reduced and a safe opening / closing device can be provided.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a slide door using a pinch determination device and an opening / closing device according to a first embodiment of the present invention.

FIG. 2 is an external view of an automobile equipped with the sliding door.

FIG. 3 is a configuration diagram showing a cross section taken along line A-A ′ of FIG. 2;

FIG. 4 is a configuration diagram showing a cross section taken along line A-A ′ of FIG. 2;

FIG. 5 is a configuration diagram of a cable-shaped piezoelectric sensor.

FIG. 6 is a block diagram of a determination unit of the apparatus.

FIG. 7 is a characteristic diagram of the apparatus.

FIG. 8 is a configuration diagram of a sunroof using an entrapment determination device and an opening / closing device according to a second embodiment of the present invention.

9 is a configuration diagram showing a cross section taken along line B-B 'of FIG.

FIG. 10 is a configuration diagram of a sheet-shaped piezoelectric sensor.

FIG. 11 is a configuration diagram of a power window using the pinch determination device and the opening / closing device according to the third embodiment of the present invention.

FIG. 12 is a configuration diagram showing a cross section taken along line CC ′ of FIG. 11;

FIG. 13 is a configuration diagram of a conventional slide door.

FIG. 14 is a configuration diagram of the sliding door.

FIG. 15 is a configuration diagram of the sliding door.

FIG. 16 is a configuration diagram of the sliding door.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Slide door (opening / closing part) 2 Body (opening) 3 Inside of car (inside area) 4 Outside of car (outside area) 5, 25 Piezoelectric sensor (sensing means) 7, 36, 37 Judging means 8 Driving means 9, 42 Control means 10 Object 22 Sliding roof (opening / closing section) 23 Roof frame (opening section) 32 Window glass (opening / closing section) 33 Window frame (opening section) 34 Pressure-sensitive switch (first sensing means) 35 Pressure-sensitive switch (second sensing) Means) 38 Motor (driving means) 41 Entrapment determination device

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G01L 1/16 G01L 1/16 B H01L 41/08 H01L 41/08 Z (72) Inventor Hiroyuki Ogino Osaka Prefecture 1006 Kadoma Kadoma Matsushita Electric Industrial Co., Ltd. (72) Inventor Biao Nagai 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. Within Sangyo Co., Ltd. (72) Inventor Masahiko Ito 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. 2E052 AA01 AA02 AA04 AA08 AA09 BA02 CA06 EA14 EA15 EA16 EB01 EC01 GA08 GB06 GB15 GC06 GD03 GD09 HA01 KA12 KA13 3D127 AA02 BB01 CB05 DF04 DF35 FF14

Claims (8)

[Claims] 1. An opening, an opening / closing unit for opening and closing the opening, an internal region and an external region separated by closing the opening / closing unit, and at least one of the opening or the opening / closing unit, An output is generated in both cases where an object in the area is sandwiched between the opening and the opening / closing section and when an object in the external area is sandwiched between the opening and the opening / closing section. And a determination unit for determining the presence or absence of a jam based on an output of the sensing unit. 2. The pinching determination device according to claim 1, wherein an output is generated in each case by folding back the long shape sensing means and arranging the sensing means on the inner region side and the outer region side. 3. The pinch determination device according to claim 2, wherein the sensing means is a cable-shaped piezoelectric sensor. 4. The pinching determination device according to claim 1, wherein an output is generated in any case by arranging the wide-width sensing means over the inner region side and the outer region side. 5. The pinch determination device according to claim 4, wherein the sensing means is a sheet-shaped piezoelectric sensor. 6. An entrapment determination device according to claim 1, wherein an output is generated in any case by having a first sensing means for the internal area and a second sensing means for the external area. . 7. The configuration according to claim 6, wherein the determination means determines that the first sensor and the second sensor are completely closed, not pinched, when the outputs are generated simultaneously.
An entrapment determination device as described in the above. 8. An entrapment determination device according to claim 1, comprising: a drive unit for driving an opening / closing unit; and a control unit for controlling the drive unit based on the determination by the entrapment determination device. If the entrapment determination device determines that entrapment is present while the opening / closing part is moving in the closing direction, the control means stops the movement of the opening / closing part or reverses the moving direction to move in the opening direction. An opening / closing device configured to control a driving unit.