JP2593776Y2 - Control circuit of closure device - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a door mounted on one of an outer peripheral portion of a door and a peripheral portion of a door opening, and locked on the other peripheral portion to forcibly pull in the other peripheral portion to open the door. The present invention relates to a control circuit of a closure device for closing a door.

[0002]

2. Description of the Related Art In recent years, doors equipped with a closure device have become widespread in order to improve operability when opening and closing the door. Such a closure device forcibly retracts the door to the door opening side immediately before the door is completely closed.When the door is completely closed, the closure device stops operating and the door switch is turned on. Detects the closed state of the
The room lamp turns off.

[0003] On the other hand, if the door is not completely closed for some reason, the closure device operates intermittently by the action of the circuit breaker, and the door pull-in operation is continued. Since the detection is made and the room lamp remains lit, the abnormality of the closure device is confirmed.

[0004]

However, the control circuit of such a conventional closure device does not have such high accuracy that the room lamp can detect the foreign object when the door is not completely closed due to the foreign object being caught. For example, when a thin object such as cloth is sandwiched, the room lamp is turned off, and if it is not possible to determine that a foreign object is sandwiched, the closure device is intermittently energized and the battery rises. There was a problem that the usability was not good.

The present invention has been made in view of such a conventional problem, and it is an object of the present invention to provide a control circuit of a closure device which can accurately recognize a foreign object pinching, does not cause a battery rise, and is easy to use. It is still another object of the present invention to provide a control circuit for a closure device that can reliably detect a pull-in operation with a simple configuration.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the gist of the present invention is as follows. (1) A latch base (40) can be pivoted on one of an outer peripheral edge of a door and a peripheral edge of a door opening. When the latch member (60) supported and attached to the latch base (40) is locked to the other peripheral portion, the latch base (40) swings, and the latch member (60) is moved. In a control circuit of a closure device for closing a door by forcibly and relatively pulling the other peripheral side toward the one peripheral side, the control circuit includes a door closing recognition circuit (80), The door closing recognition circuit (80) includes a lock detection switch (84), a pull-in detection switch (83), and a warning unit (L). Locked to the periphery Detecting the door, the pull-detecting switch (83) is connected in parallel to the locking detection switch (84), said latch member (6
0) detects that the other peripheral portion has been completely retracted toward the one peripheral portion, and the warning means (L) issues the lock detection switch (84) and the retract detection switch (8).
3), the latch member (60) is disengaged from the other peripheral portion, or the other peripheral portion is not completely drawn into the one peripheral portion, and the latch detection switch (84) is not connected. ) Or when one of the pull-in detection switches (83) is closed, power is supplied to start a warning state, and the warning means (L)
The latch member (60) is engaged with the other peripheral portion,
And, when the other peripheral portion is completely retracted toward the one peripheral portion, and the locking detection switch (84) and the retracting detection switch (83) are both opened,
A control circuit for a closure device, wherein the warning state is terminated when power is not supplied. 2 The control circuit includes the door closing recognition circuit, a limit switch (34), a process detection switch (33),
A drive motor (35), and the limit switch (3
4) When the latch member (60) is locked to the other peripheral portion, one contact point is closed, and when the latch member (60) comes off from the other peripheral portion, the other contact portion is closed. At the end of the retracting operation step of pulling the other peripheral portion toward the one peripheral portion, the one contact is closed, and the process detection switch (33) is closed. At the end of the return operation step of returning the other peripheral portion to the state before being pulled in, the other contact is closed, and the drive motor (35) is turned on by the lock detection switch (34) and the process detection switch. The latch member (60) rotates in one direction to draw the other peripheral portion toward the one peripheral portion side, and the one of the limit switches (34). Contact and process inspection The switch according to claim 1, wherein the other contact of the switch (33) is connected and the other contact of the limit switch (34) is connected to one contact of the process detection switch (33). In the control circuit of the closure device.

[0007]

With the lock detection switch (84), the pull-in detection switch (83) and the warning means (L), the latch member (60) is locked to the other peripheral portion, and the other peripheral portion is engaged. When the part side is completely retracted, both the lock detection switch (84) and the retraction detection switch (83) are opened, and the warning means (L) is de-energized, ending the warning state. Therefore, when the latch member (60) is locked to the other peripheral portion side, the latch base (40) swings, and when the latch member (60) pulls in the other peripheral portion, the door sandwiches foreign matter. When the latch member (60) cannot be completely retracted, the latch member (60) is moved to the retract detection switch (8).
3) maintains the closed state, and the warning means (L) maintains the warning state. When the latch member (60) is locked on the other peripheral edge side, the latch base (40) starts swinging, so that the latch member (60) is engaged with the other peripheral edge side with the door sandwiching a thick object. If not stopped, latch base (40)
However, since the swing does not start in the first place, there is no problem of the battery going up. When the latch member (60) cannot be completely retracted and the latch base (40) continues to swing, the warning means (L) maintains the warning state.

When the warning means (L) maintains the warning state, it is possible to recognize the abnormality of the door closing operation, and if the swing of the latch base (40) is stopped, it is possible to prevent the battery from running out. .

In the apparatus provided with the limit switch (34), the process detection switch (33) and the drive motor (35), before the latch member (60) pulls in the other peripheral portion, the limit switch (34) is turned off. The other contact is in a closed state, and the other contact of the process detection switch (33) is in a closed state. When the latch member (60) is locked to the other peripheral portion, the limit switch (34)
Is closed, and the drive motor (35)
, The latch base (40) swings, and the latch member (60) retracts the other peripheral portion.

When the latch base (40) swings and the latch member (60) completely retracts the other peripheral portion at the end of the retracting operation process, the other contact of the process detection switch (33) is opened. And one contact of the process detection switch (33) is closed. As a result, the drive motor (35) is not energized, the swing of the latch base (40) is stopped, and the door is completely closed.

When the latch member (60) is released from the other peripheral portion by the unlocking operation, the door in the completely closed state can be opened, and the other contact of the limit switch (34) is closed. Since one contact of the process detection switch (33) is in a closed state, the drive motor (35) is energized, and the latch base (40) is returned to the original position.

At the end of the return operation step in which the latch base (40) is returned to the original position, one contact of the process detection switch (33) is opened and the other contact of the process detection switch (33) is closed. Since the switch is closed and one of the contacts of the limit switch (34) is open, the drive motor (35) is de-energized and the latch base (40) stops.

[0013]

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

Each figure shows an embodiment of the present invention.

As shown in FIGS. 2 and 5, a striker 12 is fixedly provided at the center of the rear edge of the back door 10. As shown in FIG. A weather strip (not shown) is attached to the periphery of the door opening 14, and a closure device 20 a corresponding to the striker 12 is attached to the rear edge 16 of the door opening 14.
Is installed.

The closure device 20a includes a support base 20 fixed to the inner panel 17 at the rear edge 16 of the door opening 14, a motor base 30 disposed on the support base 20 so as to overlap in the vehicle longitudinal direction, and A latch base 40 is provided in a storage space 30a formed between the support base 20 and the motor base 30.

As shown in FIGS. 3 to 5, the support base 2
Reference numeral 0 denotes a striker guide groove 21 cut from the upper edge downward at the center in both sides, an unlocking operation mechanism 25 by key operation is attached to one end in both sides, and the other end in both sides. , A retraction mechanism 50 for the latch base 40 is mounted.

The unlocking operation mechanism 25 has a bell crank member 26 pivotally attached to the support base 20, and a long hole 27 is drilled at one end of the bell crank member 26. The connecting rod 27a is movably fitted to the, and the other end of the connecting rod 27a is connected to a link member 28 on the key cylinder side (not shown). Bel crank member 2
One end of a connecting rod 29 is rotatably connected to the other end of 6, and the other end of the connecting rod 29 extends to the center of the support base 20.

A detection projection 26a is formed at the other end of the bell crank member 26, and a limit switch 34, which is a locking detection switch for detecting the movement of the detection projection 26a, is provided on the motor base 30. Have been.

The retracting mechanism 50 is a toggle mechanism, and has a disk-shaped input link 51 and a pin member 5 provided on the periphery of the input link 51.
And an output link 52 connected at 1a. An output pin 53 is implanted at the tip of the output link 52, and the output pin 53 is fitted to the guide groove 23, which is a guide portion formed in the support base 20, so as to be vertically movable. Output pin 5
3 is connected to a sliding member 53a so as to be rotatable.
A guide flange 23a is formed on the periphery of the groove of No. 3,
A sliding member 53a is externally fitted to the guide flange 23a so as to be vertically movable. The tip of the output pin 53 is fixed to the other end of the latch base 40.

A storage space 30 is provided at the periphery of the support base 20.
A step pin 31 for forming a is implanted, and the step pin 31 is abutted against the motor base 30 and is fixed by caulking. A drive motor 35 is mounted on the front side of the motor base 30, and the drive motor 35 is placed horizontally with a motor shaft 35a rotatable in a counterclockwise direction extending in both sides. The drive motor 35 is provided with a speed reduction mechanism 36, and an output shaft 37 interlocked with the drive motor 35 via the speed reduction mechanism 36 projects forward. A transmission pin 37a is implanted at the tip of the output shaft 37.

A large circular insertion hole 32 through which an output shaft 37 is inserted is formed at the other end of each side of the motor base 30, and a disk 38 to be detected is provided at the base end side of the output shaft 37. The input shaft 5 is fixedly mounted on the distal end side of the output shaft 37 via a relay member.
7 are connected. An input shaft 57 is fixedly connected to the input link 51. The output shaft 3 is provided on the circumference of the detection disk 38.
A large-diameter large arc portion 38a and a small-diameter small arc portion 38b, which are concentric with the axis 7, are formed continuously.

The relay member is a forcible unlocking member 39. The unlocking member 39 is configured such that the unlocking arc portion 39a having the output shaft 37 concentric with the unlocking arc portion 39a and the transmission pin 37a are fitted to each other so that the input shaft 57 can rotate integrally with the output shaft 37. The fitting flange 39b is formed.

The motor base 30 has a disk 3 to be detected.
8 is mounted with a limit switch 33 which is a process detection switch for detecting the movement of the reference numeral 8. A harness 33a extends from the limit switch 33, and a harness 34a extends from the limit switch 34. The harnesses 33a and 34a are fixed to the motor base 30 with clips 33b without sagging.

A latch base 40 is supported at one end of the support base 20 by a pivot 41 so as to swing between a raised position and a lowered position. A contact projection 48 is formed on the other end of the latch base 40. Stopper flanges 29a and 29b are formed on the other end of the support base 20 so as to be in contact with the contact protrusions 48 at the ascending position and the descending position, respectively. A damper member 29c is fitted to the stopper flanges 29a and 29b.

A groove 42 for a striker is formed in the center of the latch base 40, and a holding bracket 43 for a damper is fixedly provided so as to cover the groove 42 for the striker from behind. A housing portion 44 is provided at the center of the holding bracket 43.
Are formed, and a fixed damper 45 and a movable damper 46 supported to be vertically movable are accommodated in the accommodation portion 44.
The moving damper 46 is urged upward by a spring member 47. The holding bracket 43 has flanges 43 on both sides.
a, 43b are extended.

An escape hole 49 is provided at the other end of the latch base 40.
The input shaft 57 penetrates the escape hole 49 so as to be relatively vertically movable.

A latch member 60, which is a locking member, is sandwiched between the flange 43a and the latch base 40.
2 and is pivotably supported at a disengaged position deviating from the second position. Latch member 60 centering on striker groove 42
A locking plate 70 is disposed on the opposite side to the locking plate 70. The locking plate 70 locks the latch member 60 at the engaged position by the pivot 71, and the unlocking position is forcibly lifted from the latch member 60 to unlock the latch member 60. It is pivotally supported to be able to swing with the posture.

The latch member 60 is urged by a spring member 62 in a counterclockwise direction, that is, in a direction swinging to a non-engagement position. The locking plate 70 is urged by a spring member 72 in a clockwise direction, that is, a direction of swinging to a locked position. A locking claw 73 for locking the latch member 60 to the engagement position is formed on the locking plate 70, and a rising protrusion 74 for kicking up the latch member 60.
Are formed. Lower end 7 of locking plate 70
5 is connected to a connecting rod 29 for unlocking.

The locking plate 70 has an abutting projection 7 applied to the forcibly unlocking member 39 so as to swing to the unlocking position.
6 extends laterally.

As shown in FIG. 1, the motor base 30 is provided with a drive circuit for the retracting mechanism 50 and a door closing / recognizing circuit 80.

The drive circuit for the retraction mechanism 50 has a limit switch 33, a limit switch 34, and a drive motor 35, which are process detection switches.

The limit switch 33 and the limit switch 34 are connected so that the drive motor 35 rotates when the ON and OFF states are different from each other.

That is, a positive electrode is connected to the switch piece 33c of the limit switch 33 via the drive motor 35, and a negative electrode is connected to the switch piece 34c of the limit switch 34. The ON contact 33a of the limit switch 33 is connected to the OFF contact 34b of the limit switch 34, and the OFF contact 33b of the limit switch 33 is connected to the ON contact 34a of the limit switch 34.

The limit switch 33 is turned on from the off state to the on state when the contact piece comes into contact with the large arc part 38a from the small arc part 38b of the disk 38 to be detected at the end of the retracting operation process. At the end of the return process, the large arc 3
When the contact piece comes into contact with the small arc portion 38b from 8a, the on-state is changed to the off-state.

The limit switch 34 is configured to be turned on when the locking plate 70 is in the locked position, and is turned off when the locking plate 70 is in the unlocked position.

A start switch 35b is connected to the on-side contact of the limit switch 33.

The door closing recognition circuit 80 includes a pull-in detection switch 83 which is turned on / off in synchronization with the limit switch 33.
And a lock detection switch 84 that is turned on / off in synchronization with the limit switch 34. That is, the limit switch 33 and the pull-in detection switch 83 are set to 2
The limit switch 34 and the lock detection switch 84 are also double switches. This dual switch is bulky and substantially
You may comprise using a relay so that it may become a continuous switch.

Switch piece 83c of pull-in detection switch 83
Is connected to a + electrode, and a room lamp L as a warning means is connected to the off contact 83b side of the pull-in detection switch 83. Similarly, a + electrode is connected to the switch piece 84c of the lock detection switch 84, and one end of the room lamp L is connected to the off contact 84b side of the lock detection switch 84. The other end of the room lamp L is grounded.

That is, the pull-in detection switch 83 and the lock detection switch 84 are connected such that the room lamp L is turned off only when both are turned on.

Next, the operation will be described.

As shown in FIG. 9, when the striker 12 on the side of the back door 10 is not inserted into the striker guide groove 21, the latch member 60 is in the disengaged position and the locking plate 70 is moved to the jaw 65 of the latch member 60. And is in an unlocked position. Further, the output pin 53 of the retracting mechanism 50 is at the top dead center, and the latch base 40 is at the raised position. Further, the detection projection 26 a of the unlocking operation mechanism 25 does not push the contact piece of the limit switch 34. In addition, the large arc portion 38 a of the detection disk 38 does not push the contact piece of the limit switch 33.

At this time, as shown in FIG. 14, since the pull-in detection switch 83 is off and the lock detection switch 84 is off, the room lamp L is lit.

As shown in FIG. 10, when the back door 10 is closed, the striker 12 is guided by the striker guide groove 21 to move downward, and the jaw 65 of the latch member 60 is moved.
Is pressed against the urging force of the spring member 62, and the latch member 60 is brought into the engagement position (the striker 12 on the other peripheral side).
In a locked state). Before and after, the locking plate 70 swings by the urging force of the spring member 72, and
The hook 3 engages with the jaw 65 to restrain the latch member 60 at the engagement position. At this time, the detection projection 26a of the unlocking operation mechanism 25 pushes the contact piece of the limit switch 34, whereby it is detected that the locking plate 70 is in the locked position.

At this time, as shown in FIG. 15, the lock detection switch 84 is turned on, but the room lamp L is also lit because the pull-in detection switch 83 is kept off.

When the contact piece of the limit switch 34 is pushed in and turned on, that is, when the locking plate 70 is in the locked position, the drive motor 35 is started, as shown in FIG. Lock member 39
, The input shaft 57 rotates, and the input link 51 rotates counterclockwise against the reaction force of the weather strip and the damper members 45 and 46 (not shown). Thus, the output pin 53 is lowered along the guide groove 23 via the output link 52, the sliding member 53a is guided by the guide flange 23a, and the other end of the latch base 40 is connected to the pivot 4
Go down around 1.

When the input link 51 further rotates counterclockwise, as shown in FIG. 6, the output pin 53 becomes the bottom dead center, the other end of the latch base 40 is lowered, and the damper member 48 is moved to the stopper flange 29b. , The latch base 40 is in the lowered position, the striker 12 is retracted through the locking plate 70 to the latch member 60, the back door 10 is fully closed, and the contact piece of the limit switch 33 is a disc to be detected. It is pushed by the large arc portion 38a of 38.

When the contact piece of the limit switch 33 is pushed by the large arc portion 38a of the detection disk 38, as shown in FIG. 1, the limit switch 33 is turned on from off and the limit switch 34 is turned on. Therefore, the drive motor 35 stops rotating. Also, the pull-in detection switch 8
3 and the lock detection switch 84 are both turned on.
The room lamp L goes out.

On the other hand, as shown in FIG.
5 is started, the output pin 53 is lowered along the guide groove 23 via the output link 52, and the sliding member 53a is guided and lowered by the guide flange 23a.
When the other end of the back door descends around the pivot 41, the back door 10 cannot be fully closed if a foreign substance is sandwiched between the back doors. At this time, the output pin 53 does not fall to the bottom dead center, and the contact piece of the limit switch 33 is
Is not pushed by the large arc portion 38a, the limit switch 33 remains off and the limit switch 34 is on, so that the drive motor 35 continues to rotate.

At this time, as shown in FIG. 16, since the pull-in detection switch 83 is off and the lock detection switch 84 is on, the room lamp L remains lit. An abnormality in the closing operation can be recognized, and the operation of the closure device 20a can be stopped to prevent the battery from running up.

In FIG. 6, when the link member 28 is rotated counterclockwise by a key operation, the bell crank member 26 is pivoted counterclockwise by the connecting rod 27a as shown in FIG. The lower end portion 75 of the locking plate 70 is pulled through the locking plate 70.
Swings clockwise about the pivot 71 to change from the locked position to the unlocked position. Thereby, the latch member 60 can swing to the non-engagement position. Also, the bell crank member 26
Swings, the projection 26a for detection does not push the contact piece of the limit switch 34, the limit switch 34 is turned off, the drive motor 35 is started, and the input link 51 is rotated. As shown in FIG. 8, the output pin 53 pushes up the other end of the latch base 40 via the output link 52, and the latch base 40 swings counterclockwise about the pivot 41, thereby raising the lift shown in FIG. Position.

When the limit switch 33 is
Comes into contact with the large arc portion 38a of the detection target circular plate 38 to the small arc portion 38b. As shown in FIGS. 13 and 14, the limit switch 33 is turned off from on and the limit switch 34 is turned off. Is off, the drive motor 35 stops.

In FIG. 6, when the start switch 36 is pressed to open the back door 10, the drive motor 35 is opened.
Starts, the forcibly unlocking member 39 rotates, and the forcibly unlocking member 3
The unlocking arc portion 39a of FIG. 9 abuts against the abutted projection 76 of the locking plate 70 and pushes down. As a result, FIG.
As shown in FIG. 1, the locking plate 70 swings clockwise about the pivot 71, and as shown in FIGS. 1 and 12, the limit switch 34 is turned off from on and the limit switch 33 is kept on. Therefore, the drive motor 35 starts. Locking plate 70 is pivot 71
Is pivoted clockwise around the center of the latch member 60 to raise the jaw portion 65 of the latch member 60.
Kick up. When the jaw portion 65 is kicked up, the latch member 60 is forcibly pivoted counterclockwise about the pivot 61, and as the striker 12 rises, as shown in FIG. It swings to the engagement position. Also, the drive motor rotates, and the input link 51
The other end of the latch base 40 is lifted through the output link 52 and the output pin 53, and the latch base 40 swings counterclockwise around the pivot 41 and rises from the lowered position.

Further, when the drive motor 35 rotates, as shown in FIG. 9, the output pin 53 is at the top dead center, the latch member 60 is in the disengaged position, and
0 is the ascending position. Once the latch member 60 is forcibly rotated to the disengaged position, the jaw 6 of the latch member 60
5, the locking claw 73 of the locking plate 70 abuts and cannot be further swung.
Never hang on.

Before or after, the unlocking arc portion 39a of the forcible unlocking member 39 does not push the contact piece of the limit switch 33, and the limit switch 33 is turned off as shown in FIG. Since the switch 34 is off, the drive motor 35 stops rotating. In the state of FIG. 9, the back door 10 can be manually lifted and opened.

The operation described above is shown as a time chart in FIG.

In the above-described embodiment, the room lamp L is shown as the warning means. However, the invention is not limited to this. For example, a warning lamp or a warning buzzer may be used.

The closure device 20a according to the above embodiment
In this case, the door switch for detecting the open / closed state of the back door 10 is substantially unnecessary, and the wiring process from the door switch becomes unnecessary, and the circuit for the retracting mechanism 50 includes the door closing door recognition circuit 80. Because it can be wired
Overall, the cost can be reduced.

[0059]

According to the back door closure device for an automobile according to the present invention, when the door is not completely closed due to foreign matter being caught in the device provided with the locking detection switch, the pull-in detection switch, and the warning means, the locking device can be closed. By accurately detecting the stopping operation and the retracting operation, the warning means maintains the warning state, so that the operator can recognize that a foreign object is caught, and the closure device continues to be energized. To stop the battery and prevent the battery from running out, improving usability. Also, by using two simple switches, a lock detection switch and a pull-in detection switch, it is possible to recognize that the door is completely closed,
For example, there is no need to use a timer circuit or the like for measuring the energization time of the closure device, the circuit configuration is simplified, the number of circuit components is reduced, and the cost can be reduced.

Further, in the apparatus provided with the lock detection switch, the process detection switch, and the drive motor, the drive motor is kept energized until the retracting operation process is completed in the locked state, and the return operation is completed in the unlocked state. Since the drive motor is continuously energized to this point, the pull-in operation step and the return operation step can be reliably detected with a simple configuration.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a door closing recognition circuit showing one embodiment of the present invention.

FIG. 2 is a perspective view of the closure device according to the embodiment of the present invention in a mounted state.

FIG. 3 is a side view of the closure device according to the embodiment of the present invention in a mounted state.

FIG. 4 is an exploded perspective view of the closure device showing one embodiment of the present invention.

FIG. 5 is a perspective view of a closure device showing an embodiment of the present invention, partially cut away and viewed obliquely from behind.

FIG. 6 is a front view of the closure device showing one embodiment of the present invention.

FIG. 7 is a front view of the closure device showing one embodiment of the present invention.

FIG. 8 is a front view of the closure device showing one embodiment of the present invention.

FIG. 9 is a front view of the closure device showing one embodiment of the present invention.

FIG. 10 is a front view of the closure device showing one embodiment of the present invention.

FIG. 11 is a front view of the closure device showing one embodiment of the present invention.

FIG. 12 is an operation explanatory view of the closure device showing one embodiment of the present invention.

FIG. 13 is an operation explanatory view of the closure device showing one embodiment of the present invention.

FIG. 14 is an operation explanatory view of the closure device showing one embodiment of the present invention.

FIG. 15 is an operation explanatory view of the closure device showing one embodiment of the present invention.

FIG. 16 is an operation explanatory view of the closure device showing one embodiment of the present invention.

FIG. 17 is a time chart of the closure device showing one embodiment of the present invention.

[Explanation of symbols]

 L: room lamp (warning means) 10: back door 12: striker 20a: closure device 20: support base 23: guide groove (guide portion) 30: motor base 33: limit switch (process detection switch) 34: limit switch 35 ... Drive motor 35a ... Motor shaft 38 ... Disc to be detected 38a ... Large arc portion 38b ... Small arc portion 40 ... Latch base 50 ... Retraction mechanism 51 ... Input link 52 ... Output link 60 ... Latch member (locking member) 70 … Locking plate 80… Door closing recognition circuit 83… Retraction detection switch 84… Lock detection switch

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E05B 65/12-65/42 B60J 5/00

Claims (2)

(57) [Scope of request for utility model registration] A latch base is swingably supported on one of an outer peripheral edge of a door and a peripheral edge of a door opening, and when a latch member mounted on the latch base is locked on the other peripheral edge side, A control circuit of a closure device for closing a door by swinging the latch base and forcibly and relatively pulling the other peripheral portion side toward the one peripheral portion side with the latch member, The control circuit includes a door closing recognition circuit. The door closing recognition circuit includes a lock detection switch, a pull-in detection switch, and a warning unit. The lock detection switch is such that the latch member is provided on the other peripheral side. Detecting that the locking is detected, the retraction detection switch is connected in parallel with the locking detection switch, and detects that the latch member completely retracts the other peripheral portion toward the one peripheral portion; The warning means is connected to the lock detection switch and the pull-in detection switch, respectively, and the latch member is disengaged from the other peripheral portion, or the other peripheral portion is completely moved to the one peripheral portion side. When one of the lock detection switch and the pull-in detection switch is closed without being retracted, the power supply is energized and a warning state is started. When the lock detection switch and the pull-in detection switch are both in the open state, the power supply is stopped, and the power supply is stopped. A control circuit for a closure device, wherein the warning state is terminated. 2. The door control system according to claim 1, wherein the control circuit includes:
A limit switch, a process detection switch, and a drive motor, wherein the limit switch is such that when the latch member is locked to the other peripheral portion side, one of its contacts is in a closed state, and the latch member is the other. When it comes off from the peripheral edge side, the other contact is in a closed state, and the process detection switch is at the end of the retracting operation step of pulling the other peripheral edge to the one peripheral edge side, and one of the contacts is closed. At the end of the return operation step of returning to the state before pulling in the other peripheral part, the other contact point is closed, and the drive motor is connected via the limit switch and the step detection switch. And the latch member rotates in one direction to pull the other peripheral portion toward the one peripheral portion side, and one contact of the limit switch. The closure device according to claim 1, wherein a point is connected to the other contact of the process detection switch, and the other contact of the limit switch is connected to one contact of the process detection switch. Control circuit.