JP2002038796A - Pinching preventing method in locking/unlocking apparatus for door body, and locking/unlocking apparatus for door body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify determination of pinching in a pinching preventing method in a locking/unlocking apparatus for a door body, and the locking/unlocking apparatus per se which has a function of the preventing pinching, based on determination of the presence/absence of the pinching by the door body, when the door body is forcedly drawn to a full-latching state by a motor. SOLUTION: When a latch 8 is arranged at a closing starting position by introduction of a striker 4, the motor M is forward rotated to start operation to draw the latch 8 to the full-latching position. At this time, a limit switch 24 detects that the latch 8 is arranged from a home position to the closing starting position, and a timer circuit in a control circuit starts to count up a drawing operation time by the motor, based on the detection. When the drawing operation time exceeds a predetermined period of time, the control circuit determines that something has been pinched between a trunk door and a vehicle main body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing a door from being pinched in a door locking / unlocking device having a function of forcibly pulling a door such as a side door or a trunk door to a full latch state by a motor in a motor vehicle. The present invention relates to a locking and unlocking device.

[0002]

2. Description of the Related Art For example, when a door of an automobile is closed, a large amount of force is required to close the door because a weatherstrip reaction force or a lock resistance acts immediately before the door is fully closed. Therefore, a device that forcibly pulls the door to a full latched state by driving a motor when a closed state of the door is detected is disclosed in, for example, Japanese Patent Publication No. 5-27748.

In the above-described apparatus for automatically closing a door by a motor, there is a possibility that an object or the like may be caught between the door and the vehicle body. Therefore, conventionally, the load current value and the rotation speed of the motor are detected, and based on the detection, the control circuit in the controller calculates and determines the entrapment,
On the basis of the determination, the further retracting operation of the door is stopped, the door is opened, and the sandwiched object is opened.

[0004]

However, since the load current value and the rotation speed of the motor fluctuate while constantly increasing or decreasing, the control circuit must perform complicated calculations during the pull-in operation. Moreover, since the load current value and the rotation speed of the motor are easily affected by the power supply voltage and the temperature, it is difficult to determine the entrapment by calculation. Therefore, an excessive load is applied to the control circuit.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and an object of the present invention is to determine the presence or absence of pinching by a door when the door is forcibly pulled to a full latch state by a motor. An object of the present invention is to provide a door locking / unlocking device having a function of preventing pinching and to simplify the pinching determination in the door locking / unlocking device and the door locking / unlocking device.

[0006]

According to the first aspect of the present invention, a locking portion for locking the door body in a closed state is introduced from an original position where it can be introduced, and the introduction portion is moved to the original position with the introduction. When the latch which rotates against the urging force to return to the rotation and engages with the locking portion is arranged at the closing start position, the latch is pulled to the full latch position by the drive of the motor to regulate the position and the door is opened. Performs the locking operation of the body, releases the position restriction of the latch disposed at the full latch position, and returns the latch to the original position by the urging force to release the engagement between the latch and the locking portion. A method for preventing pinching in an unlocking device for a door body that performs an unlocking operation, wherein when the latch is disposed from a home position to a closing start position, timing of a retraction operation time by the motor is started, and the retraction operation The time When the predetermined time exceeds a predetermined time, it is determined that the door is caught by the door body, the further retracting operation by the motor (M) is stopped, and the latch can be returned to the original position by the urging force. The gist is that the engagement with the locking portion is released.

According to a second aspect of the present invention, a locking portion for locking the door body in a closed state is introduced from an original position where it can be introduced,
A latch that rotates against the urging force that returns to the original position with the introduction and engages with the locking portion, engages with the latch at the closing start position, and moves the latch to the full latch position. Retracting means for retracting, locking means for locking the latch by the urging force in the latch direction when the latch is disposed at the full latch position, and restricting the position of the latch at the full latch position, and restricting the latch to the full latch position. The locking means is disposed at a non-engagement position against the urging force to release the locking with the latch, and is returned to the original position by the urging force, and the retracting means is moved to the original position. Unlocking means for retracting to a non-engaging position not engaged with the latch, a motor, an operating mechanism for operating the retracting means and the unlocking means based on rotation of the motor, and the operating mechanism And a control circuit for controlling the drive of the motor to operate the retracting means and the unlocking means, wherein the lock is detected from the original position to the closing start position from the original position. Detecting means, and timing means for timing the pull-in operation time by the motor based on the detection of the detection means, wherein the control circuit sets the pull-in operation time measured by the time counting means to a predetermined time. If it exceeds, it is determined that the door is caught by the door, and the gist is that the motor is drive-controlled to operate the lock releasing means.

According to a third aspect of the present invention, in the door locking and unlocking apparatus according to the second aspect, the timing means is a timer circuit provided in the control circuit.

The invention according to claim 4 is the invention according to claim 2 or 3.
In the door locking and unlocking device according to the above, the detection means,
The gist is that it is composed of limit switches. According to the first aspect of the present invention, when the latch is moved from the original position to the closing start position by the introduction of the locking portion for locking the door body in the closed state, the latch is moved to the full latch position. Up to this point, the pull-in operation by the motor is started. At this time, after the latch is arranged from the original position to the closing start position, timing of the pull-in operation time by the motor is started. When the retraction operation time exceeds a predetermined time, it is determined that the door is pinched, the further retraction operation by the motor is stopped, and the latch can be rotated and returned to the original position by the urging force. The engagement between the latch and the locking portion is released. As described above, the pull-in operation time is measured, and the entrapment is determined based on whether or not the measured time exceeds a predetermined time, so that the determination can be simplified.

According to the second aspect of the invention, when the latch is moved from the original position to the closing start position by the introduction of the locking portion for locking the door body in the closed state, the latch is moved to the full latch position. Up to this point, the pull-in operation by the motor is started. At this time, the detecting means detects that the latch has been disposed from the original position to the closing start position, and the time measuring means starts measuring the pull-in operation time by the motor based on the detection. When the retracting operation time exceeds a predetermined time, the control circuit determines that the door is pinched, stops the further retracting operation by the motor, and returns the latch to the original position by the urging force. Enabled, and the engagement between the latch and the locking portion is released. As described above, the pull-in operation time is measured, and the entrapment is determined based on whether or not the measured time exceeds a predetermined time, so that the determination can be simplified.

According to the third aspect of the present invention, since the timer means is a timer circuit provided in the control circuit, no extra device for clocking is required. According to the fourth aspect of the present invention, since the detecting means is constituted by the limit switch, the detecting means can be easily constituted.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a rear perspective view of the vehicle 1. At the rear of the vehicle 1, a trunk portion 1a for storing a load is provided. A trunk door 2 as a door body is provided at an upper portion of the trunk portion 1a, and forms a storage space for loading a load with the door 2. The trunk door 2 has a base end portion rotatably supported and a front end side (rear end side of the vehicle 1) bent downward in an L-shape.

A door closer 3 is attached to a front end of the trunk door 2 at a central position in a vehicle width direction. On the other hand, a striker 4 as a locking portion is provided in a portion of the vehicle 1 body facing the door closer device 3.

FIG. 2 is a plan view for explaining the overall structure of the door closer device 3, FIG. 3 is an exploded perspective view in which each member of the door closer device 3 is exploded, and FIG. 4 is an exploded view of each member. FIG. 5 is a side view of the door closer device 3 in FIG. 2 as viewed from the X direction. In FIGS. 3 and 4, assembling action lines (dashed-dotted lines) are drawn for parts where the members are assembled to each other.

As shown in FIGS. 2 to 5, the base plate 5 of the door closer 3 has an insertion passage 6 into which the striker 4 is inserted. As shown in FIG. 5, a support shaft 7 is provided in the vicinity of the insertion passage 6 in a direction perpendicular to the base plate 5. A substantially disk-shaped latch 8 is rotatably supported on the support shaft 7.

The latch 8 is formed in a two-stage structure having a stepped cross section and a thicker portion near the center, and has two outer peripheral surfaces on the upper and lower stages. On the outer peripheral surface on the lower side of the latch 8, a concave portion 8a for restraining the striker 4 and a locking surface 8b which is locked in the full latch position are formed. On the outer peripheral surface on the upper side of the latch 8, a locking surface 8c which is locked at the closing start position is provided.
Are formed. The locking surfaces 8b and 8c are located closer to the insertion passage 6 side (substantially rightward of the support shaft 7 in FIG. 2) with respect to the center of rotation of the latch 8 supported by the support shaft 7. In the present embodiment, as shown in FIG. 2, the state in which the latch 8 is in contact with the side wall 5 a of the base plate 5 and the position thereof is regulated is changed to the original position of the latch 8 where the striker 4 is released from the restraint by the latch 8. And

As shown in FIG. 5, a support shaft 9 is provided on the opposite side of the support shaft 7 with the insertion passage 6 therebetween.
Are provided in the vertical direction with respect to. The support shaft 9 has a first
The proximal end of the ratchet 10 is rotatably supported.

Hook portions 8d and 10a for hooking a coil spring 11 on the latch 8 and the first ratchet 10.
Are formed respectively, and the coil spring 11 is stretched between the hook portions 8d and 10a. The latch 8 and the first ratchet 10 are attracted to each other by their coil springs 11. Here, the latch portion 8d of the latch 8
Is located at a position offset in the counterclockwise direction in FIG. 2 from a straight line connecting the center of the support shaft 7 supporting the latch 8 and the hook 10a of the first ratchet 10 in the original position of the latch 8. Have been. Therefore, the latch 8 is urged clockwise in FIG. 2 by one coil spring 11 and the first ratchet 1
0 is urged in a direction (counterclockwise in FIG. 2) in contact with the outer peripheral surface of the latch 8.

The first ratchet 10 has a latch surface 10b on the distal end side for engaging with the locking surface 8b of the latch 8. When the latch surface 10b engages with the locking surface 8b of the latch 8, the latch 8 is restricted to the full latch position.
In addition, a locking pin 10c is provided upright on the distal end side of the first ratchet 10.

In the present embodiment, the latch 8 and the first ratchet 10 are formed of a metal material,
As shown in FIG. 4 and FIG.
Almost the entirety is covered with a resin member 12 so that b and 8c are exposed. In the first ratchet 10, the base end portion including the support shaft 9 is covered with a resin member 13. Therefore, when the latch 8 is rotated, the sliding noise of the resin member 12 with the base plate 5 and a driving cam 14 described later is suppressed to a small level. Further, when the first ratchet 10 is rotated, the sliding noise between the base plate 5 and the operation lever 22 described later is suppressed by the resin member 13 to be small.

Incidentally, by exposing the locking surfaces 8b and 8c of the latch 8, in the present embodiment, the latch surface 10b
In addition, when the second ratchet 20 is engaged with the locking piece 20a to be described later, welding of the members to each other by the resin is prevented.

The resin member 12 covering the latch 8 is formed with a thick portion 12a at a portion where the striker 4 collides with the recess 8a, and the thick portion 12a buffers the strike of the striker 4. Slit 12b is formed. The resin member 12 has a thick portion 12c with respect to a portion that collides with the side wall 5a of the base plate 5.
Are formed.

That is, in the present embodiment, the latch 8 and the first ratchet 10 are covered with the resin members 12 and 13, respectively, so that the sliding noise with other components during the sliding is reduced. . Also, in the present embodiment, the latch 8
By forming a thick portion 12a at a portion where the striker 4 collides with the resin member 12 covering the resin, and further forming a slit 12b, a collision sound at the time of the collision of the striker 4 is suppressed and a side wall of the base plate 5 is formed. A thick portion 12c is formed in a portion that collides with the side wall 5a to suppress a collision sound when the latch 8 collides with the side wall 5a.

A substantially U-shaped drive cam 14 is disposed on the upper surface side (the front side in FIG. 2) of the latch 8 via the resin member 12. One end of the drive cam 14 is rotatably supported by the support shaft 7. Drive cam 14
A support shaft 15 is inserted into the other end of the base member 5 in a direction perpendicular to the base plate 5. The drive cam 1 is attached to the support shaft 15.
One end of a link 16 is rotatably connected to the lower surface of the link 4.

The other end of the link 16 is rotatably connected to one end of a connecting arm 17 by a connecting pin 17a. The connecting arm 17 is fixed so as to be integrally rotatable with an output shaft 19 of an actuator 18 using the motor M as a driving source. The motor M is a power source of the door closer device 3 and rotates the connecting arm 17 fixed to the output shaft 19 in two directions. The motor M rotates forward in the normal operation to rotate the connecting arm 17 in the counterclockwise direction, and rotates in the reverse direction to rotate the connecting arm 17 in the clockwise direction during the sandwiching operation. The actuator 18 is fixed to the base plate 5 with screws (not shown).

Here, the connecting arm 1 shown in FIG. 2 (FIG. 6)
The position 7 is the open home position, and when the trunk door 2 is open, the connecting arm 17 is always located at the open home position. The position of the connecting arm 17 shown in FIG. 8 is the home position at the time of closing, and when the trunk door 2 is completely closed (full latch state), the connecting arm 17 is always located at the home position at the time of closing. I have. The position of the connecting arm 17 shown in FIG. 10 is an intermediate stop position. Then, in the vicinity of the intermediate stop position including this position (including the position immediately before the intermediate stop position shown in FIG. 9 (the reverse end position at the time of the pinching operation)), the operation of the drive cam 14, the operation lever 22 described later, and the like causes the The first and second ratchets 10 and 20 are disposed at the disengaged positions rotated clockwise, and the
Are not engaged with the first and second ratchets 10 and 20.

When the connecting arm 17 is disposed at the two positions shown in FIGS. 2 (FIG. 6) and FIG.
The drive cam 14 connected via the. Is disposed at the neutral position. When the connecting arm 17 is rotated, the drive cam 14 is converted from a neutral position into a swinging movement swinging right and left.

As shown in FIG. 5, on the lower surface of the drive cam 14, a second ratchet 20 is arranged at substantially the same height as the upper stage of the latch 8. 2nd ratchet 20
The base is supported by the drive cam 14 so that the base end is rotatable around the support shaft 21 and does not interfere with the operation of the link 16.

The tip side (free end side) of the second ratchet 20
Is formed with a locking piece 20a for engaging with a locking surface 8c formed on the upper side of the latch 8. When the locking piece 20a engages with the locking surface 8c of the latch 8 as shown in FIG. 6, the latch 8 is restricted to the closing start position. A driven pin 20b is fixed to the tip of the second ratchet 20 so as to extend on the lower surface side (the rear side in the drawing of FIG. 2).

The operating lever 22 is firstly moved by the support shaft 9.
It is coaxially supported via the ratchet 10 and the resin member 13. The operating lever 22 is formed by cutting and raising a locking portion 22 a for locking one end of the coil spring 23. The other end of the coil spring 23 is hooked on a hook 5b cut and raised by the base plate 5. The engaging portion 5b is connected to the operating lever 22.
It is formed at a height that does not interfere with the operation of. The operating lever 22 is moved by the coil spring 23 as shown in FIG.
Are biased counterclockwise. In the vicinity of the support shaft 9 of the operation lever 22, a locking projection 22b that comes into contact with the outer peripheral surface of the driving cam 14 is cut and formed.

The operating lever 22 has an arc-shaped guide groove 22c. The guide groove 22c accommodates and guides the driven pin 20b of the second ratchet 20. Since the operating lever 22 is urged in the counterclockwise direction in FIG. 2, the driven pin 20b of the second ratchet 20 is pushed against the inner peripheral surface of the guide groove 22c, and the locking piece 20a is latched. Is urged so as to come into contact with the outer peripheral surface on the upper stage side on which the locking surface 8c is formed. Then, as shown in FIG. 6, when the latch 8 is disposed at the closing start position, the operating lever 22 is rotated counterclockwise in FIG.
The latching piece 20a of the ratchet 20 is engaged with the latching surface 8c of the latch 8.
Is adapted to be engaged. At this time, the locking piece 20 a of the second ratchet 20 collides with the outer peripheral surface of the latch 8, but since the latch 8 is covered with the resin member 12,
The collision sound at the time of the collision is suppressed by the resin member 12.

The operating lever 22 is provided with an operating arm 22d. This operation arm 22d includes:
A door handle (not shown) is connected. When the opening operation is performed by the door handle, the operation lever 22 is rotated clockwise in FIG.

A limit switch 24 is provided at a position near the operating lever 22 on the base plate 5. When the latch 8 is arranged at the closing start position and the operation lever 22 rotates counterclockwise, the limit switch 24 operates the movable element of the switch 24 by an engagement protrusion 22 e formed on the operation lever 22. The switch 24 is turned off. Then, based on the turning off of the switch 24, the retracting operation of the trunk door 2 by the actuator 18 is started.

FIG. 11 shows the actuator 18. The actuator 18 includes a motor M and a reduction mechanism 30 for reducing the rotation of the motor M in the case 18a.
And a detection sensor 31 that detects the rotational position of the connecting arm 17 that is integrally rotated with the output shaft 19. The case 18a has three mounting legs 18b for mounting to the base plate 5 (FIG. 1).
In FIG. 1, only one is shown, and the other two are arranged on the back side of the case 18a so as to straddle the output shaft 19). Then, the mounting legs 18b and two mounting legs (not shown) are fixed to the base plate 5 with screws, and the actuator 18 is assembled integrally to the plate 5.

The reduction mechanism 30 includes four reduction gears 33 to 36 which are sequentially gear-coupled to a worm 32 fixed to the rotation shaft of the motor M. The output shaft 19 is fixed to the final reduction gear 36. Have been. A plate 37 made of an insulating material is fixed to one side surface 36a of the reduction gear 36 to which the output shaft 19 is fixed, and a conductive pattern 38 having a predetermined shape is formed on the plate 37.

A substrate 39 is fixed inside the case 18a, and first to third contacts 40 to 42 which are in sliding contact with the conductive pattern 38 are fixed to the substrate 39. These first to third contacts 40 to 42 are arranged so as to contact the conductive pattern 38 on the same straight line extending in the radial direction of the plate 37. The first contact 40 slides on the outer periphery of the conductive pattern 38, the third contact 42 slides on the inner periphery of the conductive pattern 38, and the second contact 41 slides on the middle of the conductive pattern 38. . The first and second contacts 4
The plate 37 made of an insulating member is exposed at a predetermined angle in the outer peripheral portion and the intermediate portion of the conductive pattern 38 in which 0 and 41 slide. The inner peripheral portion of the conductive pattern 38 with which the third contactor 42 slides is covered with a conductor over the entire periphery without exposing the plate 37.

Then, the conductive pattern 38 is rotated by the plate 37 which rotates together with the reduction gear 36, and the first and second contacts 40 and 41 are rotated by the conductive pattern 38.
Becomes conductive (on) or non-conductive (off) with the third contactor 42 and generates detection signals (SG1, SG2) for detecting the rotational position of the connecting arm 17, that is, the detection sensor 31 Is configured.

Here, the reduction gear 3 in FIG. 2 (FIG. 6)
The arrangement of No. 6 is when the connecting arm 17 is arranged at the home position at the time of opening. At this time, the first
The contact 40 is connected to the third contact 42 by the conductive pattern 38.
The second contact 41 is in a conductive state (on state) with the third contact 42 via the conductive pattern 38.

The rotation from the rotation position immediately after the open home position position shown in FIG. 2 (FIG. 6) to before the connection arm 17 (reduction gear 36) reaches the closed home position position shown in FIG. In the moving region, the first and second contacts 40 and 41 are both in conduction (on state) with the third contact 42 via the conductive pattern 38.

When the rotational position of the connecting arm 17 (reduction gear 36) reaches the closed home position shown in FIG. 8, the first and second contacts 40 and 41 become conductive patterns 38.
Are in a non-conductive state (off state) with the third contact 42.
Becomes The non-conductive state (off state) of the first and second contacts 40 and 41 with the third contact 42 is determined by the connection arm 17.
The rotation region does not change until the (reduction gear 36) reaches the intermediate stop position shown in FIG.

When the rotational position of the connecting arm 17 (reduction gear 36) reaches the intermediate stop position as shown in FIG.
The first contact 40 is brought into conduction (on state) with the third contact 42 by the conductive pattern 38. This first contact 4
0 (the ON state) with the third contactor 42 is changed in the rotation region before the connecting arm 17 (reduction gear 36) reaches the home position at the time of opening shown in FIG. 2 (FIG. 6). Absent.

FIG. 12 shows an electrical configuration of the door closer device 3. The door closer device 3 is controlled by a closer controller 43 (hereinafter simply referred to as a controller) provided in the vehicle 1. The controller 43 includes a control circuit 44.

The first and second contacts 40 and 41 constituting the detection sensor 31 are connected to input ports P1 and P2 of a control circuit 44, respectively. Also, the third contact 42
Is grounded. Then, the first and second contacts 4
When 0 and 41 become conductive (on state) with the third contact 42 via the conductive pattern 38, the contacts 40 and 41 are grounded, and the input ports P1 and P2 have the ground level (L level). Detection signals SG1 and SG2 are input.
On the other hand, the first and second contacts 40, 41
8, when the third contact 42 is brought into a non-conductive state (off state) with the third contact 42, the contacts 40 and 41 are brought into a non-ground state, and non-ground level (H level) detection signals SG1 and SG2 are applied to the input ports P1 and P2. Is entered. And the control circuit 4
4 is a combination of the ON and OFF states of the first and second contacts 40 and 41 as described above, that is, the input ports P1 and P2.
The rotational position of the connecting arm 17 (reduction gear 36) is recognized based on a combination of the logical values of the detection signals SG1 and SG2 input to.

Specifically, when the first contact 40 is turned off (the detection signal SG1 is at the H level) and the second contact 41 is turned on (the detection signal SG2 is at the L level), the control circuit 44 connects the connecting arm. 17 (reduction gear 36) is FIG. 2 (FIG. 6)
It is recognized that it is arranged at the home position at the time of opening shown in FIG.

When both the first and second contacts 40 and 41 are turned off (both the detection signals SG1 and SG2 are at H level), the control circuit 44 controls the connecting arm 17 (reduction gear 36).
Is located at the closed home position shown in FIG.

When the first contact 40 is turned on (the detection signal SG1 is at the L level) and the second contact 41 is turned off (the detection signal SG2 is at the H level), the control circuit 44 causes the connecting arm 17 (deceleration). It is recognized that the gear 36) is located at the intermediate stop position shown in FIG.

When both the first and second contacts 40 and 41 are turned on (the detection signals SG1 and SG2 are both at L level), the control circuit 44 controls the connecting arm 17 (reduction gear 36).
8 shows the home position at the time of opening shown in FIG. 2 (FIG. 6) and FIG.
It is recognized that it is arranged between the home position at the time of closing shown in FIG.

The first and second contacts 40 and 41 are both off (the detection signals SG1 and SG2 are both at the H level), or the first contact 40 is on (the detection signal SG1 is at the L level).
Level), the second contact 41 is in the off state (the detection signal SG2
Becomes H level), the control circuit 44
It is recognized that the (reduction gear 36) is disposed between the closed home position shown in FIG. 8 and the opened home position shown in FIG. 2 (FIG. 6).

That is, by using such a sliding contact type detection sensor 31, even if the power supply is cut off during the operation of the door closer device 3 and the power is supplied again, the connection arm 17 (deceleration) Since the position of the gear 36) can be recognized, the door closer device 3 can be operated continuously.

The input port P3 of the control circuit 44 is grounded via the limit switch 24. And
When the limit switch 24 is off (operating), an operation signal SG3 of a non-ground level (H level) is input to the input port P3, and when the limit switch 24 is on (non-operation), the ground level (L level) is input to the input port P3. Is input.

The input port P4 of the control circuit 44 is grounded via a door open switch 45 such as a driver's seat opener switch for opening the trunk door 2. And
When the door open switch 45 is turned on to open the trunk door 2, the ground level (L level) is applied to the input port P4.
Is input.

The input port P5 of the control circuit 44 is grounded via a trunk door courtesy switch 46 for detecting the open / closed state of the trunk door 2. This switch 46
Is generally provided in the vehicle, and is disposed at a position where the tip of the trunk door 2 of the vehicle 1 is opposed, as shown in FIG. 1, and is turned on / off by pressing / non-pressing of the door 2 Is switched. See Trunk Door 2
Is in the open state, the switch 46 is turned on, and when the trunk door 2 is closed, the switch 46 is turned off.
The switch 46 releases the latch 8 from the first ratchet 10 by an unlocking operation.
When the door 2 is disposed at a predetermined position closer to the opening direction than the position of the trunk door 2 from which the locking between the trunk door 2 and the striker 4 is released, the state is switched from the off state to the on state. That is, the setting is such that the trunk door 2 is regarded as being in the closed state and is kept in the off state even immediately after the latch 8 opens the striker 4.

When the trunk door 2 is in the open state, the switch 46 is turned on, and the input port P5 is set to H level.
The level courtesy signal SG5 is input. On the other hand, when the trunk door 2 is in the closed state, specifically, the position immediately before the opening direction where the latch 8 and the striker 4 are engaged, the switch 4 is closed.
6 is turned on, and a courtesy signal SG5 of the ground level (L level) is input to the input port P5.

Output ports P6 and P7 of the control circuit 44
Between the output ports P8 and P9, the exciting coil 4 for switching the changeover switches 47a and 47b in the relay 47;
7c and 47d are connected respectively. The changeover switch 47a is connected to the positive electrode of the motor M, and the changeover switch 47b is connected to a PTC (Positi
ve Temperature Coefficient thermistor) 48. These changeover switches 47a, 4
7b grounds both poles of the motor M when the excitation coils 47c and 47d are not excited. When the motor M is rotated forward, the control circuit 44 excites the exciting coil 47c to operate the switch 47a, and connects the positive electrode of the motor M to the battery B. On the other hand, when the motor M is rotated in the reverse direction, the control circuit 44 excites the exciting coil 47d to operate the changeover switch 47b, and connects the negative electrode side of the motor M to the battery B.

Then, as shown in FIG. 13, the control circuit 44 controls the detection sensor 31 (first and second contacts 40, 4).
1) The motor M is controlled based on the state of the limit switch 24, the trunk door courtesy switch 46, and the door open switch 45 (not shown). For convenience of explanation, the control of the control circuit 44 will be described together with the operation of the door closer device 3 described later.

The control circuit 44 includes a timer circuit 4
4a is provided. The timer circuit 44a operates (turns off) the limit switch 24 by the operation lever 22.
After that, the connecting arm 17 (reduction gear 36) is
Time required to rotate from the open home position position shown in FIG. 6 to the closed home position position shown in FIG.
The retracting operation time of the door 2 is measured.

The control circuit 44 recognizes that the retraction operation is normal if the retraction operation time of the door 2 is within a predetermined time after the limit switch 24 is turned off. Note that the predetermined time is set to a time that is sufficiently possible to normally end the retraction operation of the door 2.

On the other hand, if the retracting operation time exceeds a predetermined time, the control circuit 44 detects that an object or the like is sandwiched between the trunk door 2 and the main body of the vehicle 1 and causes the door 2 to further retract. Is recognized as impossible, the further retraction operation is stopped, and the latch 8 is stopped.
To disengage the first ratchet 10 from the motor M
To rotate the connecting arm 17 to the reverse end position shown in FIG. 9 beyond the intermediate stop position shown in FIG. 10, and from the reverse end position to rotate the motor M forward again to open the connecting arm 17 shown in FIG. Return to the home position. Incidentally, the control circuit 44 sets the reverse rotation end position shown in FIG.
The contacts 40, 41 are both in the off state (detection signals SG1, S
G2 is at H level).

Next, the operation of the door closer 3 as described above will be described with reference to the drawings. The operation of the door closer device 3 is roughly divided into a lock operation and an unlock operation.

[Locking Operation] The locking operation is an operation of completely closing the trunk door 2, that is, rotating the latch 8 engaged with the striker 4 to the full latch position.
This is an operation until the is engaged with the first ratchet 10.

First, when the trunk door 2 is open,
As shown in FIG. 2, the latch 8 is located at the original position, and the connecting arm 17 (reduction gear 36) is located at the home position when opened. In this state, the first contact 40 is off, the second contact 41 is off, and the control circuit 4
4, an H level detection signal SG1 is applied to the input port P1
An L-level detection signal SG2 is input to the input port P2. The control circuit 44 controls the detection signals SG1, SG2
Is recognized at the position of the connecting arm 17 based on

In this state, the limit switch 24
Is in the ON (non-operating) state, the L-level operation signal SG3 is input to the input port P3 of the control circuit 44. Also, since the door open switch 45 is not operated,
In this state, the H level door open signal SG4 is input to the input port P4 of the control circuit 44. In this state, the control circuit 44 does not supply power to the motor M and does not operate the motor M.

Then, the trunk door 2 is closed, and the latch 8 is pushed in by the striker 4 inserted into the insertion passage 6 against the urging force of the coil spring 11, and the latch surface 8 c of the latch 8 and the second When the locking piece 20a of the ratchet 20 is disposed at the closing start position where it can be engaged, FIG.
As shown in (2), the second ratchet 20 is rotated in the same direction by the urging force of the coil spring 23 based on the rotation of the operating lever 22 in the counterclockwise direction. 8c. Then
The engagement of the latch 8 restricts the clockwise rotation from the closing start position.

When the operation lever 22 is turned counterclockwise, the engagement protrusion 22e of the lever 22 turns off (activates) the limit switch 24, and the input port P3 of the control circuit 44 operates at the H level. The signal SG3 is input. Then, the control circuit 44 excites the exciting coil 47c, switches the changeover switch 47a, and rotates the motor M forward (close start in FIG. 13). Connecting arm 17
Rotates counterclockwise from the open home position shown in FIG.

At this time, the control circuit 44 starts measuring the pull-in operation time for judging the entrapment by the timer circuit 44a based on the OFF of the limit switch 24 (H-level operation signal SG3). If the connecting arm 17 does not rotate to the closed home position position (the position where both the first and second contacts 40 and 41 are turned off) shown in FIG. judge.

With the rotation of the connecting arm 17 in the counterclockwise direction, the drive cam 14 connected to the link 16 by the support shaft 15 is moved from the neutral position shown in FIG. It is rotated in the rotation direction. Then, the drive cam 14
The second ratchet 20 connected to the support shaft 21 by the support shaft 21 has its latching piece 20a engaged with the latching surface 8c of the latch 8, so that the latch 8 is forced by the rotation of the drive cam 14. Is rotated counterclockwise.

The latch surface 1 of the first ratchet 10
When the latch 8 is rotated until 0b can be engaged with the locking surface 8b of the latch 8, the first ratchet 10 is rotated counterclockwise by the urging force of the coil spring 11. When the connecting arm 17 reaches the top dead center position shown in FIG. 7, the latch surface 10b of the first ratchet 10 and the locking surface 8b of the latch 8 are separated from each other.

Further, when the connecting arm 17 rotates counterclockwise, the driving cam 14 rotates clockwise, and the latch 8 rotates clockwise by the urging force of the coil spring 11. . When the latch surface 10b of the first ratchet 10 and the latching surface 8b of the latch 8 are engaged, the engagement restricts the rotation of the latch 8 clockwise from the full latch position, and the trunk door 2 Is completely closed (full latch state).

Even when the latch 8 is at the full latch position, the control circuit 44 continues to rotate the motor M, and continues to rotate the connecting arm 17 counterclockwise to the closed home position shown in FIG. When the connecting arm 17 reaches the home position when closed, the drive cam 14
Is again in the neutral position and the first and second contacts 4
0 and 41 are both turned off, and the input port P of the control circuit 44 is turned off.
1 and P2 are both at the H level.
Become a level. Then, the control circuit 44 sets the connection arm 1
Recognizing that 7 is located at the closed home position shown in FIG. 8, the excitation coil 47c is de-energized and the switch 47a is switched to cut off the supply of the battery power to the motor M.

On the other hand, even if the retraction operation time exceeds a predetermined time, the connecting arm 17 is rotated until the closed home position shown in FIG. 8, ie, the first and second contacts 40 and 41 are both turned off. If not, the control circuit 44
It is determined that something has been caught between the trunk door 2 and the body 1 of the vehicle. When a predetermined time has elapsed, the control circuit 44 immediately de-energizes the exciting coil 47c, excites the exciting coil 47d, switches the changeover switches 47a and 47b, reverses the motor M, and rotates the connecting arm 17 clockwise. Rotate. The connection arm 17 passes through the top dead center position shown in FIG. 7, the home position at the time of opening (the position of the connection arm 17 in FIG. 6), and the intermediate stop position shown in FIG.
Then, the motor M is rotated forward again from the reverse end position to return the connecting arm 17 to the open home position position shown in FIG.

During the operation of the connecting arm 17, the driving cam 14 returns to the neutral position when the connecting arm 17 is located at the home position when opened, and when the connecting arm 17 further rotates counterclockwise, the driving cam 14 Rotate clockwise.
Eventually, when the connecting arm 17 rotates to the vicinity of the intermediate stop position shown in FIG. 10, the outer peripheral surface of the driving cam 14 comes into contact with the locking projection 22b of the operating lever 22, and the operating lever 22 rotates clockwise about the support shaft 9. Rotate in the direction. At this time, the outer peripheral surface of the operation lever 22 is fixed to the locking pin 1 of the first ratchet 10.
The first ratchet 10 is rotated clockwise about the support shaft 9 since the first ratchet 10 abuts on the first ratchet 10.

Then, the latch surface 10b of the first ratchet 10 comes off the latch surface 8b of the latch 8 as shown in FIG. At this time, since the driven pin 20b of the second ratchet 20 is guided by the guide groove 22c of the operation lever 22, the second ratchet 20 is separated from the second ratchet 20 to a position where the second ratchet 20 does not engage with the locking surface 8c of the latch 8 with the rotation of the operation lever 22. Placed. Therefore, when the engagement between the first ratchet 10 and the latch 8 is released, the latch 8 is disengaged from the coil spring 11.
Due to the urging force described above, it is pivotally returned clockwise around the support shaft 7 and returns to the position where it comes into contact with the side wall 5a of the base plate 5, that is, the original position. As a result, the striker 4 is released from the latch 8 so that the trunk door 2 can be opened, and any pinched object is released.

Even if the latch 8 returns to the original position, the control circuit 44 rotates the motor M in the reverse direction, that is, the first and second rotations, so that the connecting arm 17 continues to rotate clockwise to the reverse end position shown in FIG. The rotation is reversed until both the second contacts 40 and 41 are turned off (both the detection signals SG1 and SG2 are at H level). The control circuit 44 controls the connection arm 17
Is recognized as having reached that position, the exciting coil 47c
And the exciting coil 47d is de-energized, and the changeover switch 4
7a and 47b, the motor M is switched to the forward drive, and the connecting arm 17 is in the open home position shown in FIG. 2, ie, the first contact 40 is in the off state, and the second contact 41
Is in the ON state (the detection signal SG1 is at the H level, the detection signal SG
2 is at L level). When the connecting arm 17 is located at the home position when the connecting arm 17 is opened, the control circuit 44 stops the motor M and returns to the initial state of the normal trunk door 2 open state.

[Unlocking Operation] The unlocking operation is an operation of opening the fully closed trunk door 2, that is, releasing the engagement between the latch 8 and the first ratchet 10 to rotate and return the latch 8 to the original position. This is an operation for releasing the striker 4 from the latch 8.

First, in a state where the trunk door 2 is completely closed (full latch state), as shown in FIG.
Is arranged at the full latch position, and the connecting arm 17 is arranged at the home position when closed. In this state,
The first and second contacts 40 and 41 are both off, and the H level detection signals SG1 and SG2 are input to the input ports P1 and P2 of the control circuit 44, respectively. Control circuit 44
Is connected to the connecting arm 1 based on the detection signals SG1 and SG2.
7 is recognized.

When the door open switch 45 such as the driver's seat opener switch is turned on, the door open signal SG4 input to the input port P4 of the control circuit 44 changes from H level to L level. Then, the control circuit 44 excites the exciting coil 47c, switches the changeover switch 47a, and rotates the motor M forward (open start in FIG. 13). The connecting arm 17 rotates counterclockwise from the closed home position shown in FIG.

With the rotation of the connecting arm 17 in the counterclockwise direction, the driving cam 14 connected to the link 16 by the support shaft 15 rotates clockwise from the neutral position shown in FIG. Pivoted in the direction. Rotating drive cam 14
Eventually, the outer peripheral surface of the operation lever 22
b, the operating lever 22 is rotated clockwise about the support shaft 9, and the first ratchet 10 is rotated about the support shaft 9 by the locking pin 10 c abutting on the outer peripheral surface of the lever 22. Rotate clockwise.

Then, the latch surface 10b of the first ratchet 10 comes off the locking surface 8b of the latch 8 as shown in FIG. At this time, the second ratchet 20 is rotated by the operation pin 22 by the driven pin 20b and the latch 8 is moved.
Are spaced apart to a position where they do not engage with the locking surface 8c. Therefore, when the engagement between the first ratchet 10 and the latch 8 is released, the latch 8 is disengaged from the coil spring 11.
Due to the urging force of (1), the rotation returns in the clockwise direction about the support shaft 7 and returns to the original position where it comes into contact with the side wall 5a of the base plate 5. As a result, the striker 4 is released from the latch 8,
The lock of the trunk door 2 is released.

Even if the latch 8 returns to the original position,
The control circuit 44 rotates the motor M forward so that the connecting arm 17 continues to rotate counterclockwise to the intermediate stop position shown in FIG. 10, that is, the first contact 40 is turned on, and the second contact 41 is turned off. (The detection signal SG1 is at L level and the detection signal SG2 is at H level). And
When the control circuit 44 recognizes that the connecting arm 17 has reached that position, it deenergizes both the exciting coils 47c and 47d and stops the motor M. At this time, the trunk door courtesy switch 46 remains off until the door 2 is disposed at a predetermined position closer to the opening direction than the position of the trunk door 2 from which the latch 8 and the striker 4 are unlocked. is there.

Further, when the connecting arm 17 is located at the intermediate stop position shown in FIG. 10, the latch 8 cannot be engaged with the first and second ratchets 10 and 20. Here, in addition to the case where the self-weight of the trunk door 2 or the urging force of the pop-up spring provided between the door 2 and the body 1 is small, if the external force due to wind or the like acts on the door 2 further, the trunk door is closed. 2, the striker 4 may push the latch 8 again. However, the latch 8 is not engaged with the first and second ratchets 10 and 20, and the trunk door 2 is kept unlocked. In other words, even if the lock of the trunk door 2 is released by the drive of the motor M, the door 2 does not lock again due to the unexpected closing operation of the trunk door 2.
The configuration is such that a complicated operation such as repeated unlocking of the door 2 is not required.

When the trunk door 2 is opened by an operator or the like and the trunk door courtesy switch 46 is turned on, the courtesy signal SG5 input to the input port P5 of the control circuit 44 changes from H level to L level. Then, the control circuit 44 determines that the trunk door 2 is reliably opened by the opening operation of the operator or the like, and
Rotates the motor M forward so that the motor M rotates counterclockwise to the home position shown in FIG. 2, that is, the first contact 40 is turned off, and the second contact 41 is turned on (when the detection signal SG1 is H Level and the detection signal SG2 becomes L level). The control circuit 44 stops the motor M when the connecting arm 17 is located at the home position when the connecting arm 17 is opened, sets the initial state of the normal trunk door 2 open state, and prepares for the next closing operation.

As described above, according to the present embodiment,
It has the following features. (1) When the latch 8 is moved from the original position shown in FIG. 2 to the closing start position shown in FIG. 6 by the introduction of the striker 4, the motor M rotates forward and the latch 8 is pulled into the full latch position shown in FIG. The operation starts. At this time, the limit switch 24 detects that the latch 8 has been disposed from the original position to the closing start position, and the timer circuit 44a in the control circuit 44 detects the time of the pull-in operation time by the motor M based on the detection. Be started. When the retracting operation time exceeds a predetermined time, the control circuit 44 determines whether the trunk door 2 and the vehicle 1
It is determined that something is sandwiched between the main body. The control circuit 44 reverses the motor M to the reverse rotation end position shown in FIG. 9 based on the determination, stops the further retraction operation by the motor M, and sets the first and second ratchets 1.
The latches 8 and 0 are disposed at positions disengaged from the latch 8 so that the latch 8 can return to the original position by the urging force.
And the striker 4 is released. As described above, in the present embodiment, the pull-in operation time by the motor M is measured,
Since the entrapment is determined based on whether or not the measured time exceeds a predetermined time, the determination can be simplified.

(2) Since the means for measuring the pull-in operation time is the timer circuit 44a provided in the control circuit 44, no extra device for measuring the time is required. (3) Since the means for detecting that the latch 8 is disposed from the original position to the closing start position is constituted by the limit switch 24, the detecting means can be easily constituted.

(4) The detection sensor 31 of the sliding contact type detects signals SG 1 and SG 2 corresponding to the rotational position of the connecting arm 17.
, So that the connecting arm 17
Can be operated accurately. In addition, even when the power to the control circuit 44 and the motor M is cut off during the operation and the power is supplied again, the control circuit 44 can accurately recognize the rotational position of the connecting arm 17.

(5) The trunk door 2 is closed for a long time, and in the closed state, the switches 24 and 46 are closed.
Further, the first and second contacts 40 and 41 of the detection sensor 31 are turned off, that is, the input ports P1 to P5 of the control circuit 44 are not grounded. Therefore, the current flowing from each of the input ports P1 to P5 of the control circuit 44 to the ground side can be reduced,
The current consumption of the control circuit 44 can be reduced.

The embodiment of the present invention may be modified as follows. In the above embodiment, the timer circuit 44a
Is provided in the control circuit 44, but may be carried out by using another device for measuring a predetermined time.

In the above embodiment, the means for detecting that the latch 8 has been arranged from the original position to the closing start position is constituted by the limit switch 24, but may be constituted by other devices.

In the above embodiment, the trunk door courtesy switch 46 is provided at the rear end of the vehicle body 1, but may be at another position. In the above embodiment, the sliding contact type detection sensor 31 is used as the sensor for detecting the rotational position of the connecting arm 17,
Other sensors may be used.

In the above embodiment, the switches 24, 46 and the first and second contacts 40, 41 of the detection sensor 31 are turned off when the trunk door 2 is closed, but the invention is not limited to this. is not.

The mechanical structure (FIG. 2) and the electrical structure (FIG. 12) of the door closer 3 of the above embodiment may be changed as appropriate. In the above embodiment, the door closer device 3 is applied to the trunk door 2, but the doors of vehicles other than the trunk door 2
Alternatively, the present invention may be applied to a door other than the vehicle.

The technical ideas other than the claims that can be grasped from the above embodiments are described below. (A) The door locking and unlocking device according to any one of claims 2 to 4, wherein the door (2) is a vehicle door.

[0092]

As described in detail above, according to the present invention,
When a door is forcibly pulled to a full latch state by a motor, a method for preventing pinching in a door locking / unlocking device and a door locking / unlocking device having a function of determining the presence or absence of pinching by the door to prevent the pinching, The entrapment determination can be simplified.

[Brief description of the drawings]

FIG. 1 is a rear perspective view of a vehicle according to an embodiment.

FIG. 2 is a plan view showing the door closer device.

FIG. 3 is an exploded perspective view showing the door closer device.

FIG. 4 is an exploded plan view showing components of the door closer device.

FIG. 5 is a side view as viewed from the X direction in FIG. 2;

FIG. 6 is a plan view for explaining the operation of the door closer device.

FIG. 7 is a plan view for explaining the operation of the door closer device.

FIG. 8 is a plan view for explaining the operation of the door closer device.

FIG. 9 is a plan view for explaining the operation of the door closer device.

FIG. 10 is a plan view for explaining the operation of the door closer device.

FIG. 11 is a plan view showing an actuator.

FIG. 12 is a circuit diagram showing an electrical configuration of the door closer device.

FIG. 13 is a waveform diagram showing the operation of various switches and a motor of the door closer device.

[Explanation of symbols]

2. Trunk door as door, 4 striker as locking part, 8 latch, 10 first ratchet as locking means, 14 drive cam as an operating mechanism, 16 ...
A link constituting an actuating mechanism; 17 a connecting arm constituting an actuating mechanism; 20 a second ratchet constituting a retracting means; 22 an actuating lever as an unlocking means;
Deceleration mechanism constituting an operation mechanism, 44... Control circuit, 44a
... Timer circuit as time measuring means, M ... Motor.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Satoshi Ota 390 Umeda, Kosai-shi, Shizuoka Asumo Co., Ltd. (72) Inventor Tohru Yoshida 1st Toyota Town, Toyota-shi, Aichi Prefecture Toyota Motor Corporation (72) Invention Person Tadashi Isoka 206-1 Nunobikihara, Haibara-cho, Haibara-gun, Shizuoka Yazaki Parts Co., Ltd. (72) Inventor Takayoshi Aoyama 390 Umeda, Kosai-shi, Shizuoka Asmo Co., Ltd. F-term (reference) 2E250 AA21 HH02 JJ00 JJ39 KK02 LL14 NN01 PP04 QQ02 QQ03 QQ10 RR13 RR34 SS01 SS02 SS11

Claims (4)

[Claims] An engaging portion (4) for locking the door (2) in a closed state is introduced from an original position at which it can be introduced, and the urging force for rotating and returning to the original position with the introduction is provided. When the latch (8) that rotates against and engages with the locking portion (4) is arranged at the closing start position, the latch (8) is pulled to the full latch position by driving the motor (M). The position of the door (2) is locked by restricting the position, and the position of the latch (8) arranged at the full latch position is released to rotate and return the latch (8) to the original position by the urging force. A method for preventing pinching in a door locking / unlocking device for performing an unlocking operation for releasing engagement between the latch (8) and the locking portion (4), wherein the latch (8) is closed from an original position. When placed at the start position, the motor (M) will pull When the retraction operation time exceeds a predetermined time, it is determined that the door (2) is pinched, the further retraction operation by the motor (M) is stopped, and the latch (8) is stopped. ) Can be returned to its original position by an urging force and the latch (8) and the engaging portion (4) are disengaged from each other to prevent pinching in the door locking / unlocking device. Method. 2. An urging force for introducing a locking portion (4) for locking the door body (2) in a closed state from an original position at which it can be introduced, and rotating and returning to the original position with the introduction. A latch (8) that rotates against and engages with the locking portion (4); a retraction means that engages with the latch (8) at a closing start position and pulls the latch (8) to a full latch position. (20) When the latch (8) is arranged at the full latch position, the latch (8) is locked by the urging force in the direction of the latch (8).
(10) for restricting the position of the latch (8) at the full latch position, and the locking means (10) for restricting the position of the latch (8) to the full latch position are disposed at the non-engaging position against the urging force. Then, the latch with the latch (8) is released, and the latch (8) is pivotally returned to the original position by the urging force, and the retracting means (20) is moved to the latch (8).
Unlocking means (2
2), a motor (M), and an operation mechanism (14, 16, 17, 30) for operating the retracting means (20) and the unlocking means (22) based on rotation of the motor (M). A control circuit (44) for controlling the drive of the motor (M) to operate the retracting means (20) and the unlocking means (22) via the operating mechanism (14, 16, 17, 30); A door locking / unlocking device comprising: a detection unit (24) for detecting that the latch (8) has been arranged from an original position to a closing start position; and a detection unit (24) based on the detection of the detection unit (24). Clocking means (4) for measuring the pull-in operation time by the motor (M)
4a), and the control circuit (44) determines that the door (2) is jamming when the retracting operation time measured by the time measuring means (44a) exceeds a predetermined time. A lock / unlock device for a door, wherein the motor (M) is drive-controlled to operate a stop release means (22). 3. The door locking / unlocking device according to claim 2, wherein the timing means (44a) is a timer circuit provided in the control circuit (44). Locking device. 4. The door locking / unlocking device according to claim 2, wherein the detection means (24) is constituted by a limit switch.