JP2002096637A - Closing gear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a closing gear by which the load applied on an object is reduced when pinching it. SOLUTION: A slide door 2 is provided with a piezoelectric sensor 9 and a load absorbing means 10 for absorbing an impact load resulting from the pinching through the deformation by the applied load. When the slide door 2 moves toward the closing direction for a moment by the inertial force produced by the weight of the slide door 2 after pinching the object M, the load absorbing means 10 deforms and absorbs the pinching load applied on the object. Thus unnecessary, excess apply of the load on the object is eliminated, so that the pinching load is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pinch detection device for detecting a pinch of an object between an opening and an opening / closing portion for opening / closing the opening, and an opening / closing device.

[0002]

2. Description of the Related Art Heretofore, as this kind of opening / closing device, for example, there has been one disclosed in Japanese Patent Application Laid-Open No. 10-264652. FIG. 10 and FIG. 11 show a conventional opening / closing device for an automobile described in the above publication.

In FIG. 10, reference numeral 1 denotes a body as an opening of an automobile, and 2 denotes a slide door as an opening / closing section for opening and closing the body 1, which is electrically opened and closed by a motor (not shown). 11A and 11B are cross-sectional views taken along line AA of FIG. FIG. 11A shows a case where no object is pinched between the body 1 and the sliding door 2.
(B) shows a case where an object is sandwiched between the body 1 and the slide door 2. The object referred to here is, for example, a part of a human body such as a finger, a hand, an arm, a body, a neck, or a bag or luggage. FIG. 11 (a), (b)
In the figure, reference numeral 3 denotes a touch sensor having two electrodes 4 opposed to each other with a gap 4 interposed therebetween. The touch sensor 3 is disposed close to the flange 7 and is fixed to the slide door 2 via the mounting bracket 6.

With the above structure, when an object is pinched as shown in FIG. 11B during the closing operation of the slide door 2, the front end of the touch sensor 3 is crushed to the same position as the front end of the flange portion 7 due to the shock load of the pinch. Touch sensor 3
The electrodes 4 are brought into contact with each other to detect a pinch, the closing operation of the slide door 2 is stopped, and the slide door 2 is reversed and retracted.

[0005]

However, in the above-described conventional configuration, even if the motor attempts to start reversing after the touch sensor 3 detects the entrapment, the sliding door 2 cannot be rotated.
The inertia force works due to the weight of, and it does not reverse instantaneously. That is, even after the touch sensor 3 detects the entrapment, the slide door 2 moves in the closing direction for a while, and further presses even if the front end of the flange portion 7 hits the object, so that an unnecessary excessive load is applied to the object. There was a problem that it would be done.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a switchgear capable of reducing a load applied to an object at the time of pinching.

[0007]

In order to solve the above-mentioned conventional problems, an opening and closing device according to the present invention comprises a pressure sensing means for detecting the entrapment of an object in at least one of an opening and an opening and closing portion. In addition, a load absorbing means which is deformed by application of a load and absorbs a load caused by pinching is provided in at least one of the opening and the opening / closing section.

Accordingly, even if the opening / closing portion moves in the closing direction for a while due to the inertial force due to the weight of the opening / closing portion after the detection of the object being caught, the load absorbing means is deformed to absorb the sandwiching load applied to the object. Therefore, an excessively large load is not unnecessarily applied to the object, and the sandwiching load can be reduced.

[0009]

According to the first aspect of the present invention, a pressure sensing means for detecting an object being pinched is disposed in at least one of an opening and an opening and closing section, and is deformed by application of a load so that a load caused by pinching is obtained. By providing a load absorbing means for absorbing at least one of the opening and the opening / closing section, even if the opening / closing section moves in the closing direction for a while due to the inertial force due to the weight of the opening / closing section after the detection of the object being pinched, Since the load absorbing means is deformed and absorbs the load of the pinching applied to the object, the excessive load is not unnecessarily applied to the object, and the pinching load can be reduced.

According to a second aspect of the present invention, in the first aspect of the present invention, the pressure sensing means and the load absorbing means are integrated with the support means made of an elastic body, so that the opening and the opening / closing part are formed. The work efficiency can be improved without the need for labor when mounting.

According to a third aspect of the present invention, in the second aspect of the invention, since the load absorbing means also serves as the supporting means, the apparatus can be rationalized.

According to a fourth aspect of the present invention, the weight of the opening / closing section is at least one of the first to third aspects of the invention.
Based on at least one of the closing operation speed when the opening / closing unit performs the closing operation and the reaction time from when the pinching determination signal is input to the control unit to when the driving unit operates to open the pinched object. By setting the dimensions of the load absorbing means, the dimensions of the load absorbing means can be optimized according to the object to which the present invention is applied, and a highly versatile switchgear can be provided.

According to a fifth aspect of the present invention, in the fourth aspect of the present invention, the elastic modulus of the load absorbing means is set based on the size of the load absorbing means and a preset upper limit load for detection of entrapment. By doing so, the elastic modulus of the load absorbing means can be optimized according to the object to which the present invention is applied, and a highly versatile switchgear can be provided.

According to a sixth aspect of the present invention, in the fourth or fifth aspect of the present invention, a flange portion is provided at a front end of the opening / closing portion in the closing direction, and the pressure-sensitive means is more load absorbing means than the front end position of the flange portion. Is disposed in the opening / closing portion in the vicinity of the flange portion so as to be located forward by the dimension of, so that even if an object is sandwiched, the load absorbing means is deformed and the impact load of the sandwiching applied to the object To provide an opening / closing device that can reduce the load applied to the object at the time of pinching without applying an excessively large load to the object because the object is released before the object hits the flange portion. Can be.

According to a seventh aspect of the present invention, in accordance with at least one of the first to fifth aspects, a flange portion is provided at a front end in a closing direction of the opening / closing portion, and the pressure sensing means and the load absorbing means are supporting means. Since the pressure sensing means and the load absorbing means can be easily supported on the flange part by being disposed at the front end of the flange part via Can be improved.

According to an eighth aspect of the present invention, in the at least one of the first to seventh aspects, the pressure sensing means comprises a flexible piezoelectric sensor, and the load absorbing means comprises a flexible piezoelectric sensor. By having the characteristic of having flexibility, the load absorbing means is deformed when the object is pinched, and the piezoelectric sensor is also easily deformed at the same time, so the output signal from the piezoelectric sensor increases and the pinch detection accuracy And the load applied to the object by the load absorbing means can be reduced at the same time.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) In Embodiment 1, the opening and closing device of the present invention is applied to an electric sliding door of an automobile as shown in FIG. FIGS. 1A and 1B are cross-sectional views of the switchgear according to the present embodiment, corresponding to the line AA in FIG. FIG. 1A shows a state in which the slide door 2 is completely closed, and FIG. 1B shows a state in which an object M is sandwiched between the slide door 2 and the opening 8. FIG.
In (a) and (b), the left side is the front of the vehicle, and the right side is the rear of the vehicle.

This embodiment is different from the conventional switchgear in that
As shown in FIGS. 1 (a) and 1 (b), a flexible piezoelectric sensor 9 as a pressure-sensitive means and a load absorbing means 10 are integrated with a supporting means 11 made of an elastic body, and are attached via a mounting bracket 6. Is fixed to the sliding door 2.

Here, the piezoelectric sensor 9 is built in the front end side of the support means 11 and is disposed close to the flange 7 so as to be located forward of the front end of the flange 7 by the dimension L of the load absorbing means 10. Has been established. Also, load absorbing means 1
0 is a side wall portion 10a and a hollow portion 1 that can be deformed by applying a load.
0b, and also serves as a part of the support means 11. The load absorbing means 10 has more flexibility than the piezoelectric sensor 9.

The opening 8 is formed at the rear end of the door 12 of the front seat. 13 is a body, a sliding door 2
Step 13 so that the piezoelectric sensor 9, the load absorbing means 10 and the supporting means 11 do not contact the body 13 when the
a is provided.

FIG. 2 is a block diagram of the present embodiment. FIG.
In the figure, 14 is a pinch determination means for determining the pinching of an object between the opening 8 and the slide door 2 based on the output signal of the piezoelectric sensor 9, 15 is a motor as drive means for driving the slide door 2, and 16 is a motor This is control means for controlling the voltage applied to the motor 15.

FIG. 3 is a sectional view of the piezoelectric sensor 9 taken along line AA of FIG. In FIG. 3, 17 is a center electrode,
Reference numeral 18 denotes a piezoelectric layer, 19 denotes an outer electrode, and 20 denotes a coating layer.

The center electrode 17 may be an ordinary metal single wire, but here, an electrode in which a metal coil is wound around an insulating polymer fiber is used. As the insulating polymer fiber and the metal coil, a polyester fiber and a copper alloy containing 5 wt% of silver, which are commercially used in an electric blanket, are preferable.

In general, the piezoelectric layer 18 may be formed of a resin-based polymer piezoelectric material such as polyvinylidene fluoride, but may be a composite material obtained by mixing a piezoelectric ceramic powder in a polymer base material such as chlorinated polyethylene. The use of a piezoelectric body improves the high-temperature durability.

As the outer electrode 19, a band-like electrode having a metal film adhered to a polymer layer is used, and is wound around the piezoelectric layer 18. An electrode having a polymer layer made of polyethylene terephthalate (PET) and having an aluminum film adhered thereon has high thermal stability at 120 ° C. and is mass-produced commercially. Preferred as 19. Note that the piezoelectric sensor 9
It is preferable that the outer electrode 19 be wound around the piezoelectric layer 18 so as to partially overlap with each other in order to shield the outer electrode 19 from electric noise of an external environment.

As the coating layer 20, a suitable elastic polymer material such as urethane, polyethylene, or vinyl chloride is used.

The operation and operation of the switchgear configured as described above will be described below.

First, since the piezoelectric sensor 9 and the load absorbing means 10 are integrated with the supporting means 11 made of an elastic body, the piezoelectric sensor 9, the load absorbing means 10, and the supporting means 1
When installing 1 on the mounting bracket 6 of the sliding door 2, no trouble is required. Further, the load absorbing means 10 is
Is also used, so that the device can be streamlined.

Next, when the object M is sandwiched between the slide door 2 and the opening 8 as shown in FIG. 1B, a load is applied to the piezoelectric sensor 9, the load absorbing means 10, and the support means 11. Since the load absorbing means 10 has more flexibility than the piezoelectric sensor 9, the side wall 10a of the load absorbing means 10
Are compressed and deformed, and the hollow portion 10b is crushed. Thereby, the piezoelectric sensor 9 is greatly deformed.

[0031] FIG 4 is the output signal V of the piezoelectric sensor 9 at this time, the determination output J of the pinching determination unit 14, the applied voltage V _m to the motor 15, the relationship between load W applied to the object M at the time of pinching FIG. In FIG. 4, the vertical axis represents V, J, _Vm , W in order from the top, and the horizontal axis represents time t.

In FIG. 4, at time t ₁ ,
Applying a voltage of V _d the sliding door 2 is closed operation.
When an object M between the slide door 2 and the opening 8 is sandwiched, a signal corresponding to the acceleration of deformation of the piezoelectric sensor 9 by a piezoelectric effect of a piezoelectric sensor 9 (larger signal component than the reference potential V ₀ Fig. 4) Is output.

In this case, if the piezoelectric sensor 9 is simply disposed on the support portion 6, the mounting bracket 6 is a rigid body, so that the deformation of the piezoelectric sensor 9 when sandwiched is slight. In this case, as shown in FIG. 1, the piezoelectric sensor 9 is disposed on the support section 6 via a support means 11 made of an elastic body, and the support means 11 further includes a side wall 10a which can be deformed by applying a load.
And the hollow portion 10b are integrated with the load absorbing unit 10, and the load absorbing unit 10 is more flexible than the piezoelectric sensor 9, so that the side wall 10a is compressed and deformed at the time of sandwiching. As a result, the amount of deformation of the piezoelectric sensor 9 increases, and at the same time, the hollow portion 10b is crushed, and the amount of deformation of the piezoelectric sensor 9 further increases.

In a low-temperature environment where the environmental temperature is 0 ° C. or lower, the side wall 10a may be hardened and the amount of deformation of the piezoelectric sensor 9 may be reduced.
Is suppressed, a decrease in the amount of deformation of the piezoelectric sensor 9 is suppressed.

As described above, the piezoelectric sensor 9 can obtain a large amount of deformation, and the acceleration, which is the second derivative of the amount of deformation, also increases. As a result, the output signal of the piezoelectric sensor 9 also increases.
This makes it easier to distinguish between the original signal component at the time of pinching and the signal component due to external vibration or electric noise.

When pinching occurs, W starts to increase at time t ₂ . The pinching determination unit 14 determines that entrapment has occurred if the set value D ₀ or more where amplitude V-V ₀ which from V ₀ which V is set in advance, as a determination output at time t ₃ of Lo → Hi → Lo Outputs pulse signal. Control means 1
In 6, when this pulse signal is present, the application of the voltage of + V _d to the motor 15 is stopped, the voltage of −V _d is applied for a certain period of time until time t _5, the sliding door 2 is opened for a certain distance, and the object To release.

Here, after the pinch determination means 14 detects the pinch and the control means 16 receives the pinch determination signal, the slide door is opened until the motor 15 starts reversing to open the pinched object. A reaction time Δt is required due to the inertial force due to the weight of 2. The side wall 10a of the load absorbing unit 10 is further compressed and deformed during Δt, and the hollow portion 10b is further crushed, so that the load absorbing unit 10 absorbs the load caused by the pinching as shown in FIG. .

[0038] Thus, the sliding door 2 before the object M hits the flange portion 7 starts inverted at time t _4. At this time, as described later, the load absorbing means 10 has a predetermined size L
, The slide door 2 is inverted before the hollow portion 10b is completely crushed. W becomes maximum W ₀ at time t _4, since, because the object M is released from pinching W decreases.

FIG. 5 is a characteristic diagram comparing W when sandwiched between the switchgear of the first embodiment and the conventional switchgear. In FIG. 5, the vertical axis is W, and the horizontal axis is time t.

In the case of the conventional opening / closing device (P2 in the figure), the inertia force due to the weight of the sliding door 2 acts, so that the sliding door 2 is temporarily stopped even after the motor detects the entrapment.
Will move in the closing direction, since the front end of the flange portion 7 is further pressed even hit the object M, and unnecessarily excessive load W ₁ from being applied to the object M, the switching device of this embodiment (FIG. among, P1), to absorb the load applied by the load absorbing means 10 is sandwiched, the slide door 2 starts inverted at time t ₄ before the object M hits the flange portion 7, reduce the W than conventional switchgear be able to.

The dimension L of the load absorbing means 10 is, for example,
What is necessary is just to determine based on the weight of the ride door 2. Figure 6
Maximum applied load W when pinching₀And the load absorbing means 10
The relationship between the dimension L and the weight W of the sliding door 2_bThe parameter
FIG. 4 is a characteristic diagram shown as data. In FIG. 6, the vertical axis is
W₀, The horizontal axis is L. The longer L is, and the more W_bIs small
Well, W₀Becomes smaller. W₀The upper limit of W₀₁given that,
The weight of the sliding door 2 is W _b1L in the case of
₁It can be seen that it should be set to. The relationship in FIG.
It can be determined by experiment.

The dimension L of the load absorbing means 10 may be obtained based on the product X of the closing operation speed v and the reaction time Δt when the sliding door 2 performs the closing operation. Since X is the distance that the slide door 2 moves during the reaction time Δt, L
Is desirably set to a value larger than X. Note that v
And Δt can be obtained in advance by experiments. v may be obtained as an average speed when the sliding door 2 performs the closing operation, or may be obtained as a speed immediately before the sandwiching object to be detected is sandwiched.

[0043] The elastic modulus k of the load absorbing means 10 may be set based on a value obtained by dividing Y limit load W _L preset entrapment detection in L obtained above, k is than Y It is desirable to set a small value.

When sandwiching, V is larger or smaller than V ₀ depending on the bending direction and polarization direction of the piezoelectric sensor 9, electrode assignment (which is the reference potential), piezoelectric sensor 9. since the change by the support direction, the amplitude of the V ₀ which V in pinching determination unit 14 | V-V ₀ | may be determined constitute a pinching based on, determining pinching regardless of the magnitude for V ₀ which V Can be.

As described above, in the present embodiment, the pressure sensing means for detecting the entrapment of an object is provided in the opening / closing section, and the load absorbing means for deforming by applying a load and absorbing the load caused by the entrapment is provided in the opening / closing section. With this configuration, even if the opening / closing part moves in the closing direction for a while due to the inertial force due to the weight of the opening / closing part after detection of the object being caught, the load absorbing means deforms and absorbs the entrapment load applied to the object. Therefore, an unnecessary excessive load is not applied to the object, and the sandwiching load can be reduced.

Further, in this embodiment, since the pressure sensing means and the load absorbing means are integrated with the supporting means made of an elastic body, the pressure sensing means, the load absorbing means, and the supporting means can be attached to the opening / closing section. The work efficiency can be improved without labor.

Further, since the load absorbing means of this embodiment also serves as the supporting means, the apparatus can be rationalized.

The dimensions of the load absorbing means of this embodiment are as follows:
Weight of the opening and closing part, closing operation speed when the opening and closing part performs the closing operation,
And the control means is set based on at least one of the reaction time until the driving means operates to open the sandwiched object after the sandwiching determination signal is input to the object to which the present invention is applied. Accordingly, the dimensions of the load absorbing means can be optimized, and a highly versatile switchgear can be provided.

The elastic modulus of the load absorbing means of the present embodiment is set based on the dimensions of the load absorbing means and a preset upper limit load for detection of entrapment. Accordingly, the elastic modulus of the load absorbing means can be optimized, and a highly versatile switchgear can be provided.

Also, in this embodiment, a flange portion is provided at the front end in the closing direction of the opening / closing portion, and the pressure-sensitive means is provided on the flange portion so as to be located forward of the front end position of the flange portion by the size of the load absorbing means. By being disposed in close proximity to the opening / closing section, even if an object is pinched, the load absorbing means deforms to absorb the pinch impact load applied to the object, and before the object hits the flange portion. Since the object is opened, it is possible to provide an opening / closing device capable of reducing the load applied to the object at the time of pinching without applying an unnecessary excessive load to the object.

In this embodiment, the pressure sensing means is made of a flexible piezoelectric sensor, and the load absorbing means is more flexible than the piezoelectric sensor. At this time, the load absorbing means is deformed, and at the same time, the piezoelectric sensor is also easily deformed, so that the output signal from the piezoelectric sensor is increased and the detection accuracy of the entrapment can be improved, and at the same time, the load absorbing means applies the object to the object. The load can be reduced.

In the above embodiment, the piezoelectric sensor 9 as the pressure sensing means, the load absorbing means 10 and the supporting means 11 are arranged on the slide door 2 as the opening / closing part. Alternatively, the piezoelectric sensor 9 may be provided on the slide door 2 so as to be located forward of the flange 7, and the load absorbing means 10 may be provided on the opening 8. With this configuration, the object M is sandwiched between the slide door 2 and the opening 8, and after the piezoelectric sensor 9 detects that the object M is sandwiched, the slide door 2 is temporarily closed in the closing direction due to the inertial force due to the weight of the slide door 2. Even if the load M moves, the load absorbing means 10 deforms and absorbs the pinching load applied to the object M, so that an unnecessary excessive load is not applied to the object M. Similarly, the pinching load can be reduced.

(Embodiment 2) FIG. 7 is a sectional view of an opening and closing device according to Embodiment 2 of the present invention, taken along line AA of FIG. 10, and shows a state in which a slide door 2 is completely closed. This embodiment is different from the opening / closing device of the first embodiment in that the sliding door 2 serving as an opening / closing unit is provided with a flange 7 at the front end in the closing direction as shown in FIG. The means 10 is located at the front end of the flange portion 7 via the support means 11.

According to the above configuration, in this embodiment, a flange portion is provided at the front end in the closing direction of the opening / closing portion, and the pressure sensing means and the load absorbing means are disposed at the front end of the flange portion via the support means. Since the pressure sensing means and the load absorbing means can be easily supported on the flange portion, it is possible to improve the working efficiency without requiring any trouble in mounting.

Further, since the mounting bracket 6 as in the first embodiment becomes unnecessary, the apparatus can be rationalized.

(Embodiment 3) FIG. 8 is a sectional view of a switchgear according to Embodiment 3 of the present invention, which corresponds to the line BB in FIG. This embodiment is different from the opening and closing devices of the first and second embodiments in that the opening and closing device in the present embodiment is applied to an electric sunroof 21 shown in FIG.

In FIG. 8, reference numeral 22 denotes a roof glass forming a sunroof 21 serving as an opening / closing portion; 23, a load absorbing means; 23a, a side wall portion which can be deformed by applying a load;
Is a hollow portion, and 24 is a support means made of an elastic body. The piezoelectric sensor 9 and the load absorbing means 23 are integrated with the support means 24 and fixed to the front end of the roof glass 22 in the closing direction. The load absorbing means 23 also serves as a part of the support means 24. The load absorbing means 23 has more flexibility than the piezoelectric sensor 9. Reference numeral 25 denotes an opening formed in the body ceiling 26.

With the above configuration, when an object is pinched between the sunroof 21 and the opening 25, the load absorbing means 23 is deformed to reduce the pinching load applied to the object as in the first embodiment. Because of absorption, an excessively large load is not unnecessarily applied to the object, and the sandwiching load can be reduced.

(Embodiment 4) FIG. 9 is a sectional view of a switchgear according to Embodiment 4 of the present invention, corresponding to the line CC of FIG. This embodiment is different from the opening and closing devices of the first to third embodiments in that the opening and closing device in the present embodiment is applied to a power window 27 shown in FIG.

In FIG. 9, reference numeral 28 denotes a window glass forming a power window 27 as an opening / closing portion, 29 denotes a window frame as an opening, 30 denotes a glass seal, 31 denotes a load absorbing means, and 31a denotes a deformable portion by applying a load. Side wall, 31b
Is a hollow portion, and 32 is a support means made of an elastic body. The piezoelectric sensor 9 and the load absorbing means 31 are integrated with the supporting means 32 and fixed to the lower end of the window frame 29. The load absorbing means 31 also serves as a part of the support means 32. The load absorbing means 31 has more flexibility than the piezoelectric sensor 9.

According to the above configuration, when the object is sandwiched between the power window 27 and the window frame 29, the first embodiment is used.
Similarly to the above, the load absorbing means 31 deforms and absorbs the pinching load applied to the object, so that an unnecessary excessive load is not applied to the object and the pinching load can be reduced. .

In the above embodiment, the configuration using the piezoelectric sensor as the pressure sensing means has been described. However, the pressure sensing means is not limited to the piezoelectric sensor. For example, a touch switch or an optical cable type pressure sensor may be used. Other pressure-sensitive sensors such as a pressure-sensitive conductive pressure sensor and a capacitance-type pressure sensor may be used.

In the first embodiment, the piezoelectric sensor as the pressure sensing means is disposed at the front end in the closing direction of the slide door 2 as the opening and closing part. However, the pressure sensing means is arranged around the opening and closing part and the opening. It is also possible to provide a configuration for detecting entrapment.

As another structure for absorbing the load caused by the pinching, a spring as a load absorbing means is provided on the mounting bracket 6 to absorb the load applied to the pressure sensing means and the supporting means by the spring. Is also good.

In the above embodiment, the opening / closing device of the present invention is applied to a sliding door, a sunroof, and a power window of an automobile. However, it is applied to other opening / closing devices of an automobile, such as an electric hatchback and an automatic hood opening / closing device of a convertible vehicle. May be. Further, the present invention may be applied to an opening / closing device other than an automobile, for example, an elevator or a shutter, an automatic door of a vehicle or a building, and the like.

The switchgear of the present invention is not limited to the above-described embodiment, and it goes without saying that various changes can be made without departing from the spirit of the present invention.

[0067]

As described above, according to the first to eighth aspects of the present invention, even if the opening / closing portion moves in the closing direction for a while due to the inertial force due to the weight of the opening / closing portion after the detection of the object being caught,
Since the load absorbing means is deformed and absorbs the load of the pinching applied to the object, the excessive load is not unnecessarily applied to the object, and the pinching load can be reduced.

[Brief description of the drawings]

FIG. 1 (a) is a cross-sectional view of the opening / closing device according to the first embodiment of the present invention, taken along line AA of FIG. 10 (in a state where a sliding door is completely closed). A of FIG. 10 of the device
Sectional view corresponding to line -A (with an object sandwiched between the sliding door and the opening)

FIG. 2 is a block diagram of the apparatus.

FIG. 3 is a cross-sectional view of the piezoelectric sensor of the device corresponding to the line AA in FIG. 10;

FIG. 4 is a characteristic diagram showing a relationship among an output signal V of a piezoelectric sensor of the apparatus, a determination output J of a pinching determination unit, a voltage V _m applied to a motor, and a load W applied to an object M at the time of pinching.

FIG. 5 is a characteristic diagram comparing W between the switchgear according to the first embodiment and the conventional switchgear at the time of pinching.

FIG. 6 is a characteristic diagram showing the relationship between the maximum applied load W ₀ and the dimension L of the load absorbing means when the opening / closing device is pinched in the first embodiment, using the weight W _{b of the} sliding door as a parameter.

FIG. 7 is a sectional view of the switchgear according to the second embodiment of the present invention, which corresponds to the line AA in FIG. 10;

FIG. 8 is a sectional view of the switchgear according to the third embodiment of the present invention, corresponding to the line BB in FIG. 10;

FIG. 9 is a sectional view of the switchgear according to a fourth embodiment of the present invention, which corresponds to line BB in FIG. 10;

FIG. 10 is an external view of a switchgear in a conventional automobile.

11A is a cross-sectional view of the device corresponding to the line AA in FIG. 10 (in a state where the sliding door is completely closed). FIG. 11B is a cross-sectional view of the device corresponding to the line AA in FIG. (A state in which an object is sandwiched between the sliding door and the opening)

[Explanation of symbols]

 2 Sliding door (opening / closing part) 7 Flange part 8, 25 Opening 9 Piezoelectric sensor (pressure sensing means) 10, 23, 31 Load absorbing means 11, 24, 32 Supporting means 14 Entrapment determining means 15 Motor (driving means) 16 Control Means 21 Sunroof (opening / closing part) 27 Power window (opening / closing part) 29 Window frame (opening)

Continued on the front page (72) Inventor Koji Yoshino 1006 Kazuma Kadoma, Kadoma-shi, Osaka Matsushita Electric Industrial Co., Ltd. F-term (reference) 2E052 AA09 BA02 CA06 EA13 EB01 EC01 GA03 GB06 GD09 HA01

Claims (8)

[Claims] An opening; an opening / closing unit for opening and closing the opening; a driving unit for driving the opening / closing unit; and a pressure-sensitive unit disposed in at least one of the opening and the opening / closing unit. Entrapment determination means for determining the entrapment of an object between the opening and the opening / closing part based on the output signal of the pressure sensitive means, and releasing the object when the entrapment determination means determines that the object is entrapped A control means for controlling the driving means, and a load absorbing means for absorbing a load caused by pinching is provided in at least one of the opening and the opening / closing part. 2. The opening / closing device according to claim 1, wherein the pressure sensing means and the load absorbing means are integrated with the supporting means made of an elastic body and are disposed in at least one of the opening and the opening / closing section. 3. The switchgear according to claim 2, wherein the load absorbing means also serves as the supporting means. 4. The dimensions of the load absorbing means are:
Based on at least one of the closing operation speed when the opening / closing unit performs the closing operation and the reaction time from when the pinching determination signal is input to the control unit to when the driving unit operates to open the pinched object. The switching device according to at least one of claims 1 to 3, which is set. 5. The switchgear according to claim 4, wherein the elastic modulus of the load absorbing means is set based on a size of the load absorbing means and a preset upper limit of the load for the detection of entrapment. 6. A flange portion is provided at a front end in a closing direction of the opening / closing portion, and the pressure sensing means is close to the flange portion so as to be located forward of a front end position of the flange portion by a size of a load absorbing means. The switchgear according to claim 4 or 5, wherein the switchgear is disposed in the section. 7. The apparatus according to claim 1, further comprising a flange at a front end of the opening / closing portion in a closing direction, wherein the pressure-sensitive means and the load absorbing means are disposed at a front end of the flange via support means. The switchgear according to the item. 8. The apparatus according to claim 1, wherein said pressure sensing means comprises a flexible piezoelectric sensor, and said load absorbing means has more flexibility than said piezoelectric sensor. Switchgear.