JP2950044B2 - Sliding door closing device for vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door closing device for a vehicle sliding door which automatically opens and closes a sliding door provided at a customer entrance of a vehicle such as a train or a train. , Which can manually open a sliding door.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication No. 3-253460 discloses a conventional sliding door for a vehicle in which a sliding door for a vehicle is opened and closed by a linear motor and the sliding door is kept closed by a permanent magnet when the door is closed. Are known. FIG. 5 is a front view of a conventional example in a door closed state, and FIG. 6 is a view of a main part of FIG. In FIG. 5, a pair of left and right double sliding doors 1 is shown.
A and 1B are installed at the customer entrance of the vehicle. The linear motors 4A and 4B are composed of a stator 4a fixed to the vehicle side wall member 5 and a mover 4b fixed to the sliding doors 1A and 1B, and the respective movers 4b move in opposite directions. Thus, the double sliding doors 1A and 1B are opened and closed.
In FIG. 6, a door closing state holding means 1 for one sliding door 1A is shown.
4A includes a permanent magnet 15A and an electromagnet 16A, and the permanent magnet 15A is fixed to one sliding door 1A via a holder 15a. The electromagnet 16A includes an iron core 17 and an electromagnetic coil 18, and is fixed to the vehicle side wall member 5 via a holder 16a. The same applies to the door closing state holding means 14B for the other sliding door 1B, and the permanent magnet 15B, the electromagnet 16B, the holder 1
5a, an iron core 17, an electromagnetic coil 18, and a holder 16a.

[0003] According to such a structure, the permanent magnet 15 and the electromagnet 16 approach each other as the double sliding doors 1A and 1B close, and when the sliding doors are closed, they contact each other. By the magnetic attraction force by 15
The permanent magnet 15 and the iron core 17 are attracted, whereby the double sliding doors 1A and 1B are kept in the door closed state. In order to open the double sliding doors 1A and 1B, the electromagnetic coil 18 is energized and a magnetic flux of the same polarity as the magnetic flux generated by the permanent magnet 15 is generated in the iron core 17, so that the permanent magnet 15 is moved away from the electromagnet 16 A repulsive force acting on the surface is generated. Subsequently, by energizing the linear motors 4A and 4B so that the mover 4b moves in the opening direction, the double sliding doors 1A and 1B are opened.

[0004]

In the above-mentioned conventional apparatus for closing a sliding door for a vehicle, it is the magnetic attraction force of a permanent magnet that keeps the sliding door in a closed state, and any externally supplied energy is required. Although there is an advantage that is not required, opening the door requires energization of the electromagnetic coil to obtain a repulsive force acting in a direction away from the permanent magnet. However, when a power failure occurs in the vehicle, the power supply to the electromagnetic coil becomes impossible, so that there is a problem that the sliding door cannot be manually opened. Further, each time the door is opened, the electromagnetic coil is energized, so that there is a problem that an auxiliary power supply having a large current capacity is required.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle that can stably have a sufficiently large door-closing holding force without external energy in a door-closed state and that can be manually opened without the need for external energy even when the door is opened. An object of the present invention is to provide a door closing device for a sliding door.

[0006]

Means common to the door closing device for a vehicle sliding door of these inventions are a sliding door suspended by a door wheel on a support rail body attached to a side wall member of the vehicle, and a sliding door that opens and closes the sliding door. An engaging means comprising a linear motor to be driven, a driving plate fixed to a movable element of the linear motor, and a passive plate fixed to the sliding door, which engages with a gap in the opening and closing direction of the sliding door; Door-closed state holding means that holds the movable magnetic pole attached to the door closed or opened by holding the door closed by the rotation of the columnar permanent magnet, and is fixed to the side wall member;
Detachment means provided between the door-closed state holding means and the mover and attached / detached just before the door is closed, and motion conversion means for converting linear movement of the attachment / detachment means into rotational movement of the permanent magnet. And manual opening means for manually rotating the permanent magnet.

According to a first aspect of the present invention, a pair of the sliding doors are opened right and left, and each sliding door has the linear motor and
The engaging means, the door-closed state holding means, the attaching / detaching means, the motion converting means, and the manual opening means are provided. In the invention 2, the driving plate closes the passive plate. In the third aspect, a spring biasing in the direction is mounted.
Is a device in which a universal joint is interposed between the sliding door and the movable magnetic pole. Invention 4 is a device in which a universal joint is interposed between the mover and the attaching / detaching means. The door-closed state holding means is provided with a touch sensor on a surface on which the movable magnetic pole is attracted. Invention 6 is a pair of sliding doors which open left and right, and each of the door-closed state holding means has a permanent The magnet is magnetized in a different direction when the door is closed, and a reed switch is arranged along the double-door closed state holding means. Invention 7 is a pair of sliding doors that open right and left, The permanent magnets of the closed state holding means are magnetized in the same direction when the door is closed, and a reed switch is arranged on each door closed state holding means. With a position sensor between , The invention 9, the manual Hirakito means,
The remote control mechanism comprises a flexible outer tube and a wire engaged with the linear motion portion of the motion conversion means.

[0008]

The operation will be described with reference to FIGS. 1, 2 and 3. The actions common to these inventions are as follows. When the mover 4b of the linear motor 4A moves in the closing direction, the engaging means 20 moves the sliding door 1A in the closing direction with a gap x behind, and the attaching / detaching means 50 is in a state immediately before the suction. When further closed, the mover 4b moves the motion converting means 40 via the attaching / detaching means 50, and the permanent magnet 31A rotates to operate in the direction in which the door closed state holding means 30A attracts the movable magnetic pole 39. At the same time, the mover 4b also moves the sliding door 1A in the closing direction, so that the state shown in FIG. 3 is reached, and the door closing state holding means 30A fixed to the side wall member 5 closes the sliding door 1A via the movable magnetic pole 39. Hold in state.

In order to open the sliding door 1A from this closed state,
When the linear motor 4A is operated in the opening direction and the mover 4b moves within the distance of the gap x in the opening direction, the door closed state holding means 30
A keeps the sliding door 1A in the closed state via the movable magnetic pole 39, but the mover 4b can move only in the gap x of the engaging means 20 and moves the attaching / detaching means 50 in the opening direction.
For this reason, the mover 4b is connected to the attaching / detaching means 50, the motion converting means 4
0, the permanent magnet 31A is rotated, and the door closed state holding means 30A opens the movable magnetic pole 39, that is, the holding of the sliding door 1A. Further, when the mover 4b moves in the opening direction, the sliding door 1A is fully opened via the engagement means 20. At this time, the attaching / detaching means 50 is separated from the movable element 4b, and the permanent magnet 31A is held by itself and prepares for the next door closing together with the attaching / detaching means 50.

The operation when the sliding door 1A is manually opened from the closed state will be described. Even if the linear motor 4A is not driven and the door closed state holding means 30A holds the sliding door 1A in the door closed state via the movable magnetic pole 39, the movable element 4
b has a play that can move within the distance of the gap x in the opening direction. Therefore, the rack 41 or the frame 43
Is only the force to move the mover 4b, the permanent magnet 31A of the door closed state holding means 30A turns to release the holding, and thereafter, the sliding door 1A is manually opened with a light operating force. .

Next, the operation which is not common to the respective inventions will be described. According to the first aspect of the present invention, since the left and right functional parts for maintaining the closed state of the sliding doors 1A and 1B are present independently of each other, there is no joint malfunction. According to invention 2, the spring 23
The driving plate 21 does not intermittently and passively drive the passive plate 22 so that the sliding door 1A moves smoothly, and when the door is closed, the sliding door 1A and the locking means 20 having the spring 23 are movable. Child 4b, attaching / detaching means 50 and motion converting means 40
, The rotation of the permanent magnet 31A is securely held by itself. According to the third aspect, even if there is a dimensional error or vibration of the vehicle, the universal joint 38 absorbs the vibration and the door closed state can be reliably maintained. According to the fourth aspect, even if there is a dimensional error or vibration of the vehicle, the universal joint 51 absorbs the error and the detachment operation is ensured.
According to the fifth aspect, the safety is improved by detecting that the touch sensor 71 has attracted the door closed state holding means 30A and the movable magnetic pole 39. According to the sixth aspect, the reed switch 72 detects that the permanent magnets 31A and 31B are maintained in the holding state, thereby improving safety. According to the seventh aspect, the reed switches 73A and 73B detect that the permanent magnets 31A and 31B are maintained in the holding state, thereby improving the safety. The holding power increases. According to invention 8, the position sensor 24 detects that the mover 4b is at the door closing position,
When the mover 4b moves due to vibration of the vehicle or the like, the linear motor 4A can be restarted and returned. According to the ninth aspect, the door closed state holding unit 30A can be remotely operated from a remote place.

[0012]

1 is a front view of an essential part of a first embodiment just before the door is closed, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. 3 is a sectional view of the door corresponding to FIG. 4 is a cross-sectional view of the second embodiment in a door-closed state corresponding to FIG. In the conventional example and each drawing, the components denoted by the same reference numerals have substantially the same functions, and duplicate description may be omitted. Since the components are symmetrical, the upper right portion of the left sliding door is mainly illustrated and described. In Example 1 shown in FIGS. 1 to 3, the left sliding door 1A and the right sliding door 1B are
The upper part is suspended by a plurality of door rollers 3 on a support rail 2 which is horizontally passed along the side wall member 5 of the vehicle above the entrance of the vehicle, and the entrance of the vehicle is automatically opened and closed. The mover 4b of the linear motor includes sliding doors 1A and 1B.
The door stopper 74 is fixed to the side wall member 5 by being supported by a supporting device (not shown) so as to be movable in the opening / closing direction of the door.

Movable element 4b of linear motor 4A and sliding door 1A
Is composed of a driving plate 21 fixed to the mover 4b and a passive plate 22 fixed to the sliding door 1A. The driving plate 21 and the passive plate 22 have a gap x in the opening and closing direction. The sliding door 1A is opened and closed. Drive plate 21
It is preferable to mount a spring 23 for urging the passive plate 22 in the closing direction, or to mount a position sensor 24 between the end of the mover 4A and the side wall member 5.

A movable magnetic pole 39 is attached to the sliding door 1A via a universal joint 38, and the side wall member 5 is opposed to the movable magnetic pole 39.
Door closed state holding means 30A is fixed to the side. The door-closed state holding means 30A includes a columnar permanent magnet 31A in which an N pole and an S pole are radially magnetized to face each other, and a pair of magnetic pole pieces 32A surrounding the permanent magnet 31A. The pair of magnetic pole pieces 32A has a non-magnetic portion at each end, and in the state of FIG. 2, the door closed state holding means 30A does not adsorb the movable magnetic pole 39 because the internal magnetic path is opened, and the state of FIG. Then, the internal magnetic path is closed to attract the movable magnetic pole 39. For this reason, 9 of the permanent magnet 31A
The rotation of 0 ° opens or holds the sliding door 1A in the closed state. The right-side door closed state holding means 30B is also independent and symmetrical to 30A. The holding force by the magnetic force of the permanent magnet 31A is preferably about 100 kg.

The permanent magnet 31A of the door closed state holding means 30A
, A gear 42 meshing with the rack 41 is fixed, and the rack 41 and the gear 42 form a motion converting means 40 for converting a linear motion into a rotary motion. The motion converting means 40 may be a crank mechanism or the like. The rack 41 is fixed to a frame 43 that can move in the opening and closing direction of the sliding door by a support mechanism (not shown), and rotates the permanent magnet 31A by 90 °.

A detachable means 50 comprising a universal joint 51 and a magnet 52 for attracting the universal joint 51 is provided between the mover 4b and the frame 43, and the distance of the gap x from the door closing position, for example, just before the door is closed, is provided. Only adsorbs and moves beyond this
When b opens, it escapes from adsorption. The detaching force of the detaching means 50 is preferably about 10 kg. The attaching / detaching means 50 may be a latch mechanism or the like.

The frame 43 has a flexible outer tube 6.
1 and the wire 62 are locked as manual door opening means 60, and when the wire 62 is pulled by a lever (not shown), the permanent magnet 31A is rotated via the frame 43, that is, the rack 41, and Door closed state holding means 30
A releases the holding of the movable magnetic pole 39. The holding may be released by moving the frame 43, the rack 41, or the permanent magnet 31A.

If the touch sensor 71 is provided on the surface of the door-closed state holding means 30A, 30B on which the movable magnetic pole 39 is attracted, a signal of the door-closed state is transmitted to improve safety. As shown in FIG. 3, if the permanent magnets 31A and 31B are magnetized in different directions,
The reed switch 72 can detect the positions of the magnetic poles of the permanent magnets 31A and 31B, that is, that the door-closed state holding means 30A and 30B maintain the sliding doors 1A and 1B in the held state. In addition, as in the second embodiment shown in FIG.
If the permanent magnets A and 31B are magnetized in the same direction and the respective permanent magnets are provided with the reed switches 73A and 73B, there is no leakage magnetic flux between the adjacent permanent magnets, and the door closing state holding means 30
The holding force of A, 30B on the sliding doors 1A, 1B increases. Only two reed switches 73A and 73B are required. Further, instead of the double sliding door as in the embodiment, one of the double sliding doors may be used.

The operation of the above embodiment will be described for each invention. As an operation common to each invention, first, the linear motor 4A
When the mover 4b moves in the closing direction, the engagement means 20
Moves the sliding door 1A in the closing direction with a gap x at the rear, and as shown in FIGS. 1 and 2, the attaching / detaching means 50 is in a state just before suction. When further closed, the mover 4b moves the motion converting means 40 via the attaching / detaching means 50, and the permanent magnet 31A rotates to operate in the direction in which the door closed state holding means 30A attracts the movable magnetic pole 39. At the same time, the movable element 4b is a sliding door 1A.
3 is also moved in the closing direction, so that the state shown in FIG. 3 is reached, and the door-closed state holding means 30A fixed to the side wall member 5 holds the sliding door 1A in the door-closed state via the movable magnetic pole 39. In this state, since the magnetic path of the door closed state holding means 30A is closed together with the movable magnetic pole 39, the permanent magnet 31A is self-held without rotating.

In order to open the sliding door 1A from this closed state,
When the linear motor 4A is operated in the opening direction and the mover 4b moves within the distance of the gap x in the opening direction, the door closed state holding means 30
A keeps the sliding door 1A in the closed state via the movable magnetic pole 39, but the mover 4b can move only in the gap x of the engaging means 20 and moves the attaching / detaching means 50 in the opening direction.
For this reason, the mover 4b is connected to the attaching / detaching means 50, the motion converting means 4
0, the permanent magnet 31A is rotated, and the door closed state holding means 30A opens the movable magnetic pole 39, that is, the holding of the sliding door 1A. Further, when the mover 4b moves in the opening direction, the sliding door 1A is fully opened via the engagement means 20. At this time, the attachment / detachment means 50 escapes the adsorption from the mover 4b and separates, and the permanent magnet 31A is self-held and prepares for the next door closing together with the attachment / detachment means 50.

The operation when the sliding door 1A is manually opened from the closed state will be described. Even if the linear motor 4A is not driven and the door closed state holding means 30A holds the sliding door 1A in the door closed state via the movable magnetic pole 39, the movable element 4
b has a play that can move within the distance of the gap x in the opening direction. Therefore, the rack 41 or the frame 43
Is only the force to move the mover 4b, the permanent magnet 31A of the door closed state holding means 30A turns to release the holding, and thereafter, the sliding door 1A is manually opened with a light operating force. .

Next, the operation of the components that are not common to each invention will be described. According to the first aspect, the sliding door 1 has a left and right opening.
Since the left and right functional components for A and 1B for keeping the door closed exist independently of each other, there is no joint malfunction. According to the second aspect, the spring 23 makes the movement of the sliding door 1A smooth without the driving plate 21 intermittently and impactfully driving the passive plate 22, and in the closed state, the sliding door 1A and the spring 23 The rotation of the permanent magnet 31A is securely held by the holding means 20, the movable element 4b, the attaching / detaching means 50, and the motion converting means 40. According to the third aspect, even if there is a dimensional error or vibration of the vehicle, the universal joint 38 absorbs the vibration and the door closed state can be reliably maintained. According to the fourth aspect, even if there is a dimensional error or vibration of the vehicle, the universal joint 51 absorbs the error and the detachment operation is ensured. According to the fifth aspect, the safety is improved by detecting that the touch sensor 71 has attracted the door closed state holding means 30A and the movable magnetic pole 39. According to invention 6, the reed switch 7
2 detects that the permanent magnets 31A and 31B are maintained in the holding state, and improves safety. According to the seventh aspect, the reed switches 73A and 73B include the permanent magnets 31A and 31B.
Is maintained in the holding state, the safety is improved, and the leakage magnetic flux between the adjacent permanent magnets is eliminated, so that the holding force on the sliding door is increased. According to invention 8,
The position sensor 24 detects that the mover 4b is at the door closing position, and can restart and return the linear motor 4A when the mover 4b moves due to vibration of the vehicle or the like. According to the ninth aspect, the sliding door can be manually opened by remotely operating the door-closed state holding means 30A from a remote place.

[0023]

The common effect of these inventions is that in the closed state, there is no need for any externally supplied energy, so that a stable and sufficiently large door closing holding force can be obtained. In addition, in the event of a vehicle emergency, the sliding door can be easily opened manually with a small force, and an auxiliary power supply is required to release the holding force of the door closed state holding means in normal opening. Therefore, an auxiliary power supply having a large current capacity is not required.

According to the first aspect of the present invention, since the left and right functional parts for maintaining the closed state of the sliding door having the left and right doors are independently provided on the left and right sides, there is no joint malfunction. According to the second aspect, the spring makes the sliding door move smoothly, and the rotation of the permanent magnet is securely held in the closed state. According to Invention 3,
The universal joint absorbs dimensional errors and vibrations of the vehicle, thereby ensuring that the door is kept closed. According to the fourth aspect, the universal joint absorbs the dimensional error and the vibration of the vehicle, and the detachment operation is ensured. Invention 5
According to this, the safety is improved by detecting that the touch sensor has attracted the door closed state holding means and the movable magnetic pole. According to the sixth aspect, the reed switch detects that the permanent magnet is maintained in the holding state, thereby improving safety. According to the seventh aspect, the reed switch detects that the permanent magnet is maintained in the holding state, thereby improving safety. In addition, there is no leakage magnetic flux between the adjacent permanent magnets, and the holding force on the sliding door increases. According to the eighth aspect, the position sensor 24 detects that the mover 4b is at the door closing position, and can restart and return the linear motor when the mover moves due to vibration of the vehicle or the like. According to the ninth aspect, the door-closed state holding means can be remotely operated from a remote place.

[Brief description of the drawings]

FIG. 1 is a front view of a main part of a first embodiment just before a door is closed.

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 is a sectional view of the door closed state corresponding to FIG. 2;

FIG. 4 is a cross-sectional view of the second embodiment in a door-closed state corresponding to FIG. 3;

FIG. 5 is a front view of a conventional example in a door closed state.

FIG. 6 is a view taken along arrow Q of a main part of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1A Sliding door 1B Sliding door 2 Support rail body 3 Door roller 4A Linear motor 4B Linear motor 4a Stator 4b Mover 5 Side wall material 20 Engagement means 21 Drive plate 22 Passive plate 23 Spring 24 Position sensor 30A Door closed state holding means 30B Door closed state Holding means 31A Permanent magnet 32A Magnetic pole piece 38 Universal joint 39 Movable magnetic pole 40 Motion conversion means 43 Frame 50 Detachment means 51 Universal joint 52 Magnet 60 Manual door opening means 71 Touch sensor 72 Reed switch 74 Door stopper

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-253460 (JP, A) JP-A-4-353070 (JP, A) JP-A-4-73190 (JP, U) JP-A-63- 69277 (JP, U) Japanese Utility Model Showa 53-82012 (JP, U) Japanese Utility Model Application Hei 4-6463 (JP, U) (58) Fields surveyed (Int. Cl. ⁶ , DB name) B61D 19/02

Claims (9)

(57) [Claims] 1. A sliding door suspended by a door wheel on a support rail attached to a side wall member of a vehicle, a linear motor for driving the sliding door to open and close, a driving plate fixed to a movable element of the linear motor, and the sliding door. An engaging means consisting of a passive plate fixed to the sliding door and engaging with a gap in the opening and closing direction of the sliding door, and holding the movable magnetic pole attached to the sliding door in the door closed state by rotating a cylindrical permanent magnet or A door-closed state holding means for releasing the holding and being fixed to the side wall member, a detaching means provided between the door-closed state holding means and the movable element and detaching just before the door closed state, In a door closing device for a vehicle sliding door, comprising: a motion converting means for converting a linear motion of the attaching / detaching means into a rotating motion of the permanent magnet; and a manual opening means for manually rotating the permanent magnet, And a pair of The sliding door of the vehicle, wherein the sliding door is provided with the linear motor, the engaging means, the door closed state holding means, the attaching / detaching means, the motion converting means, and the manual opening means. Door closing device. 2. A sliding door suspended by a door wheel on a support rail attached to a side wall member of a vehicle, a linear motor for opening and closing the sliding door, a driving plate fixed to a movable element of the linear motor, and the sliding door. An engaging means consisting of a passive plate fixed to the sliding door and engaging with a gap in the opening and closing direction of the sliding door, and holding the movable magnetic pole attached to the sliding door in the door closed state by rotating a cylindrical permanent magnet or A door-closed state holding means for releasing the holding and being fixed to the side wall member, a detaching means provided between the door-closed state holding means and the movable element and detaching just before the door closed state, In a door closing device for a vehicular sliding door, the driving plate includes: a motion converting unit that converts a linear motion of the attaching / detaching unit into a rotating motion of the permanent magnet; and a manual opening unit that manually rotates the permanent magnet. Biasing the passive plate in the closing direction Door closing device for a vehicle sliding door, which comprises mounting the spring. 3. A sliding door suspended by a door wheel on a support rail body attached to a side wall member of a vehicle, a linear motor for driving the sliding door to open and close, a driving plate fixed to a movable element of the linear motor, and the sliding door. An engaging means consisting of a passive plate fixed to the sliding door and engaging with a gap in the opening and closing direction of the sliding door, and holding the movable magnetic pole attached to the sliding door in the door closed state by rotating a cylindrical permanent magnet or A door-closed state holding means for releasing the holding and being fixed to the side wall member, a detaching means provided between the door-closed state holding means and the movable element and detaching just before the door closed state, In a door closing device for a vehicle sliding door, comprising: a motion converting means for converting a linear motion of the attaching / detaching means into a rotating motion of the permanent magnet; and a manual opening means for manually rotating the permanent magnet. Via a universal joint between the movable magnetic pole Door closing device for a vehicle sliding door, which comprises. 4. A sliding door suspended by a door wheel on a support rail attached to a side wall member of a vehicle, a linear motor for driving the sliding door to open and close, a driving plate fixed to a movable element of the linear motor, and the sliding door. An engaging means consisting of a passive plate fixed to the sliding door and engaging with a gap in the opening and closing direction of the sliding door, and holding the movable magnetic pole attached to the sliding door in the door closed state by rotating a cylindrical permanent magnet or A door-closed state holding means for releasing the holding and being fixed to the side wall member, a detaching means provided between the door-closed state holding means and the movable element and detaching just before the door closed state, In a door closing device for a sliding door for a vehicle, comprising a motion converting means for converting a linear motion of the attaching / detaching means into a rotating motion of the permanent magnet, and a manual opening means for manually rotating the permanent magnet, A universal joint between the attachment and detachment means Door closing device for a vehicle sliding door, characterized in that the instrumentation. 5. A sliding door suspended by a door wheel on a support rail attached to a side wall member of a vehicle, a linear motor for driving the sliding door to open and close, a driving plate fixed to a movable element of the linear motor, and the sliding door. An engaging means consisting of a passive plate fixed to the sliding door and engaging with a gap in the opening and closing direction of the sliding door, and holding the movable magnetic pole attached to the sliding door in the door closed state by rotating a cylindrical permanent magnet or A door-closed state holding means for releasing the holding and being fixed to the side wall member, a detaching means provided between the door-closed state holding means and the movable element and detaching just before the door closed state, In a door closing device for a sliding door for a vehicle, comprising a motion converting means for converting a linear motion of the attaching / detaching means into a rotating motion of the permanent magnet, and a manual opening means for manually rotating the permanent magnet, Holding means for attracting the movable magnetic pole Door closing device for a vehicle sliding door, characterized in that providing a touch sensor on the surface. 6. A sliding door suspended by a door wheel on a support rail body attached to a side wall member of a vehicle, a linear motor for opening and closing the sliding door, a driving plate fixed to a movable element of the linear motor, and the sliding door. An engaging means consisting of a passive plate fixed to the sliding door and engaging with a gap in the opening and closing direction of the sliding door, and holding the movable magnetic pole attached to the sliding door in the door closed state by rotating a cylindrical permanent magnet or A door-closed state holding means for releasing the holding and being fixed to the side wall member, a detaching means provided between the door-closed state holding means and the movable element and detaching just before the door closed state, In a door closing device for a vehicle sliding door, comprising: a motion converting means for converting a linear motion of the attaching / detaching means into a rotating motion of the permanent magnet; and a manual opening means for manually rotating the permanent magnet, The door Wherein each of the permanent magnets of the state holding means, the door closing device for a vehicular sliding door, characterized in that are magnetized in different directions in a door-closed state along a Ryoto閉 state holding means to place the reed switch. 7. A sliding door suspended by a door wheel on a support rail body attached to a side wall member of a vehicle, a linear motor for opening and closing the sliding door, a driving plate fixed to a movable element of the linear motor, and the sliding door. An engaging means consisting of a passive plate fixed to the sliding door and engaging with a gap in the opening and closing direction of the sliding door, and holding the movable magnetic pole attached to the sliding door in the door closed state by rotating a cylindrical permanent magnet or A door-closed state holding means for releasing the holding and being fixed to the side wall member, a detaching means provided between the door-closed state holding means and the movable element and detaching just before the door closed state, In a door closing device for a vehicle sliding door, comprising: a motion converting means for converting a linear motion of the attaching / detaching means into a rotating motion of the permanent magnet; and a manual opening means for manually rotating the permanent magnet, The door State wherein each of the permanent magnets of the retaining means, the door closing device for a vehicular sliding door, which comprises placing the reed switch to each of the door-closed state hold means is magnetized in the same direction in a door-closing state. 8. A sliding door suspended by a door wheel on a support rail attached to a side wall member of a vehicle, a linear motor for driving the sliding door to open and close, a driving plate fixed to a movable element of the linear motor, and the sliding door. An engaging means consisting of a passive plate fixed to the sliding door and engaging with a gap in the opening and closing direction of the sliding door, and holding the movable magnetic pole attached to the sliding door in the door closed state by rotating a cylindrical permanent magnet or A door-closed state holding means for releasing the holding and being fixed to the side wall member, a detaching means provided between the door-closed state holding means and the movable element and detaching just before the door closed state, In a door closing device for a sliding door for a vehicle, comprising a motion converting means for converting a linear motion of the attaching / detaching means into a rotating motion of the permanent magnet, and a manual opening means for manually rotating the permanent magnet, Position the sensor between the side wall material Wearing the door closing device for a vehicle sliding door, which comprises. 9. A sliding door suspended by a door wheel on a support rail body attached to a side wall member of a vehicle, a linear motor for driving the sliding door to open and close, a driving plate fixed to a movable element of the linear motor, and the sliding door. An engaging means consisting of a passive plate fixed to the sliding door and engaging with a gap in the opening and closing direction of the sliding door, and holding the movable magnetic pole attached to the sliding door in the door closed state by rotating a cylindrical permanent magnet or A door-closed state holding means for releasing the holding and being fixed to the side wall member, a detaching means provided between the door-closed state holding means and the movable element and detaching just before the door closed state, A sliding door for a vehicle, comprising: a motion converting means for converting a linear motion of the attaching / detaching means into a rotating movement of the permanent magnet; and a manual opening means for manually rotating the permanent magnet. Means, the straight line of said motion converting means Door closing device for a vehicle sliding door, characterized in that a remote operation mechanism is engaged with the moving portion composed of an outer tube and wire with flexibility.