JPH0536058Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an automatic opening/closing device for a sliding door for a vehicle, which automatically opens and closes a sliding door of a vehicle such as an automobile.

(Prior art) Sliding doors of vehicles such as automobiles are generally
When the door is closed, the sliding door is almost flush with the outside surface of the car body, and when the door is opened, the entire sliding door once moves outside the car, and then moves along a curved guide path parallel to the car body. There are many.

A conventional automatic opening/closing device that automatically opens and closes a sliding door along such a curved guide path is disclosed, for example, in Japanese Patent Laid-Open No. 52-55117.

In this device, a connector that moves in a straight line almost parallel to the side wall of the car body by reciprocating wires has an upward pin protruding from it, and this pin is attached to a bracket fixed to the sliding door. By engaging with the drilled horizontally elongated hole, the connector moves linearly, but the sliding door can move along a curved guide path.

(Problem that the invention aims to solve) However, in such conventional devices, the pin slides in the horizontally long hole, so that the movement trajectory of the connector on the vehicle body side and the movement trajectory of the bracket on the sliding door side can be changed. Since it is designed to absorb the difference between the two, there are problems such as large friction between them, making it difficult to transmit large driving force to the sliding door side, and the need to make the bracket larger. .

Therefore, as shown in FIG. 7, for example, a wire 42 for reciprocating the sliding door 41,
43 along a partially curved guide rail 45 fixed to the vehicle body 44 side.
The traction force of 2,43 is directly applied to the sliding door 41.
It is preferable to let the other person know. (Such a device is described in the patent application filed in 1982 by the present applicant.
It is disclosed in the specification and drawings of No. 41581. ) In FIG. 7, 46 indicates the wire 42,
A winding drum for reciprocating 43, 47
48 is a bracket provided on the sliding door 41 side; 49 is a horizontal roller that is pivotally supported by this bracket 48 and rolls along the guide rail 45; It is.

However, in such a device, simply fixing the ends of the wires 42 and 43 to the front and rear ends of the bracket 48 as shown in FIG.
The longer the longitudinal length of the bracket 48, the smaller the movable range of the bracket 48 within the guide rail 45.
Not only must the total length L1 of
There is a problem in that the length must be approximately equal to the total length L1 of the guide rail 45 (L2=L1).

Furthermore, as shown by the solid line in FIG.
As shown by imaginary lines in FIG. 7, the effective length of the wires 42 and 43 when the bracket 48 passes through the curved portion 45b of the guide rail 45 is
When the bracket 48 passes through the curved portion 45b, the wire 42,
There are problems such as the wires 43 becoming too tense, the bracket 48 biting the guide rail 45, and the wires 42, 43 being unable to run.

Incidentally, the influence of such fluctuations in the effective lengths of the wires 42, 43 can be resolved by providing a certain amount of slack in the wires 42, 43; In case of stopping, etc., slide door 4
1 may wobble back and forth, or other problems may occur.

The object of the present invention is to provide an automatic opening/closing device for a sliding door for a vehicle that solves all of the above-mentioned problems.

(Means for solving the problem) In order to achieve the above purpose, in this invention,
An automatic opening/closing device for a sliding door for a vehicle that opens and closes the sliding door along a partially curved rail that is fixed to the vehicle body and faces approximately in the longitudinal direction, and is capable of being rotated forward and backward by an appropriate drive means. 2 on the outer periphery of the winding drum installed on the car body.
One end of each wire is wound in opposite directions, and each end is fixed to the winding drum, and one end of the wire is guided to extend rearward from the front end of the rail. The other end of the wire is placed along the free edge and the trailing edge of the tip of the bracket that is provided on the sliding door and moves along the rail, facing toward the center of the vehicle body, and the end is fixed to the trailing edge. and the other end of the other wire guided so as to extend forward from the rear end of the rail, along the free edge and front edge of the tip of the bracket,
It is characterized in that a terminal is fixed to the leading edge.

(Function) In the present invention, the two wires overlap each other at the free edge of the tip of the bracket, and each end is fixed to the front and rear edges of the bracket, so that the bracket can pass through the curved part of the rail. When doing so, both wires act in substantially the same way as when one wire is run along a rail,
The effective length of both wires when the bracket is on a straight section of the rail and the effective length of both wires when the bracket passes through a curved section of the rail hardly change.

(Example) Hereinafter, an example of the present invention will be described based on FIGS. 1 to 6.

1 is a car body, and 2 is a sliding door.

A channel-shaped lower rail 3 is fixed to the lower side of the vehicle body 1 and has a front end slightly curved inward of the vehicle body 1 in the longitudinal direction. A lower roller device 4 is slidably fitted therein.

A channel-shaped waist rail 5 extending in the front-rear direction is fixed to the middle part of the rear side of the vehicle body 1, and within this waist rail 5 is a waist roller device attached to the middle part of the rear end of the sliding door 2. 6 are slidably fitted.

Although not shown, an upper rail is fixed to the upper side of the vehicle body 1 so as to form a vertical pair with the lower rail 3, and an upper roller device attached to the upper inner surface of the sliding door 2 is attached to the upper rail. (not shown) are slidably fitted.

Therefore, in the sliding door 2, the lower roller device 4, the waist roller device 6, and the upper roller device are connected to the lower rail 3 and the waist rail 5, respectively.
By sliding along the upper rail, it comes out slightly outside the vehicle body 1 from the fully closed position X shown by the imaginary line in FIG. It can be opened to the fully open position Y and closed in the opposite direction.

The automatic opening/closing device A for a sliding door for a vehicle according to this embodiment is equipped with a motor 7 which is rotatable in forward and reverse directions and which is attached to the lower surface of the floor of a vehicle body 1, and a reduction gear device 8 having a built-in electromagnetic clutch.

As shown in FIGS. 1 to 3, the reduction gear 8
The worm wheel 1 has a key 11 coupled to a rotating shaft 10 which is supported in a case 9 and faces upward and downward.
2, and a worm 13 that meshes with the worm wheel 12 and is connected to the rotating shaft 7a of the motor 7.

An excitation coil 15 fixed to the case 9 is inserted into an annular gap 14 formed from the upper end to the vicinity of the lower end of the worm wheel 12 .

A winding drum 16 is fitted around the lower half of the rotating shaft 10 that hangs down from the lower surface of the case 9 so as to be relatively rotatable.
The armature 17 is attached so that it can move relative to the rotating shaft 10 in the axial direction by spline connection, but cannot rotate relative to the winding drum 16.

Teeth 17a and 12a that can engage with each other are provided on opposing surfaces of the upper surface of the armature 17 and the lower surface of the worm wheel 12, respectively, on a circumference concentric with the rotating shaft 10.

18 is a release plunger for separating the armature 17 from the worm wheel 12;
9 is a tension spring for pulling the armature 17 toward the winding drum 16, and 20 is a cover that covers the winding drum 16.

Thus, the worm wheel 12 becomes the rotor.
An electromagnetic clutch 21 is formed by the excitation coil 15 and the armature 17,
When the excitation coil 15 is energized, the teeth 17a of the armature 17 and the teeth 1 of the worm wheel 12
2a are engaged with each other to transmit the rotational force of the motor 7 to the winding drum 16, and the excitation coil 15
When the energization is stopped, both teeth 17a, 12
The mesh of a is disengaged, and the connection between the worm wheel 12 and the winding drum 16 is cut off.

Two wires 22, 2 are attached to the winding drum 16.
3 is fixed, and both wires 22 and 23 are wound in opposite directions around the outer periphery of the winding drum 16 and then pulled out in the front-back direction.

As shown in FIGS. 4 and 5, the wire 22 pulled out forward from the winding drum 16 is attached to a guide pulley 25 that is pivotally connected to the lower surface of the floor of the vehicle body 1 with a shaft 24 in the vertical direction. After being passed around,
A cylindrical wire end is attached to a free edge 26a and a trailing edge 26b of the bracket 26 fixed to the sliding door 2 toward the rear, and fixed to the end thereof. Member 22a is attached to rear edge 26 of bracket 26.
It is fixed closer to b.

Further, the wire 23 pulled out rearward from the winding drum 16 is connected to a flexible outer tube 27.
After passing through the inside, it is pulled out forward from the hard guide tube 28 fixed to the rear end of the lower rail 3 and facing in the front-rear direction, and after being almost parallel to the lower rail 3,
A wire end with a hole that overlaps the wire 22 vertically by being placed along the free edge 26a at the tip of the bracket 26, and is also placed along the front edge 26c at the tip of the bracket 26 and is fixed to the end thereof. The member 23a is fastened to the bracket 26 with a bolt 30 and a nut 31 that are vertically inserted through a long hole 29 in the left and right direction formed near the front edge of the bracket 26, so that the mounting position can be adjusted.

32 is a bent part 3c between the straight part 3a and the front curved part 3b of the lower rail 3,
A guide piece that smoothly guides both wires 22 and 23 so that they are always substantially parallel to the lower rail 3,
The center part is fixed to a bracket 33 supported on the lower surface of the floor of the vehicle body 1, and both end parts, which can be elastically bent in an arc shape with a large curvature, are connected to a wire 2.
By pressing the wires 22, 23 from the sides, it is possible to take up some slack in the wires 22, 23.

The bracket 26 is a part of the lower roller device 4, and includes a horizontal roller 34 that engages with the lower rail 3 having a downward U-shaped cross section, and a bottom plate 35 supported further below the lower rail 3. A vertical roller 36 rolling thereon is pivotally supported to form a lower roller device 4.

Thus, the two wires 22 and 23 connect the guide pulley 25, the outer tube 27, and the guide tube 2.
8, guide piece 32, etc., the winding drum 16 forms substantially one loop-shaped endless wire, and rotates in one predetermined direction, thereby fully closing the sliding door 2. The sliding door 2 can be opened from position X to fully open position Y, or closed from fully open position Y to fully closed position X by rotating the winding drum 16 in the opposite direction.

37 is a limit switch that is provided at the rear end of the lower rail 3 and is activated by coming into contact with the bracket 26 when the sliding door 2 reaches the fully open position Y to stop the rotation of the motor 7;
The bracket 2 is provided at the front end of the lower rail 3, and when the sliding door 2 reaches the fully closed position
This is a limit switch that is activated by contacting the motor 6 and stops the rotation of the motor 7.

In addition, the automatic opening/closing device A includes an operating device for instructing the opening and closing of the sliding door 2, a door lock release device for releasing the door lock prior to opening the sliding door 2, and a door lock release device for unlocking the sliding door 2 prior to the opening operation of the sliding door 2. A control device (all not shown) for electrically controlling opening/closing is provided, but since these devices are not directly related to the present invention, detailed explanation thereof will be omitted.

Since this embodiment has the above-described configuration, the bracket 26 is connected to the straight portion 3a of the lower rail 3.
When moving along the curved portion 3b of the lower rail 3, both wires 22 and 23 overlap vertically over the entire free edge 26a at the tip of the bracket 26, and when the bracket 26 moves along the curved portion 3b of the lower rail 3, both wires 22 and 23 overlap By moving the overlapping portion of the wires 22 and 23 to the corner between the free edge 26a and the rear edge 26b at the leading end of the bracket 26, both wires 22 and 23 substantially connect one wire to the lower rail 3. It works in almost the same way as when the wires 22, 2
3 can be prevented from bulging outward of the lower rail 3, and the effective length of the wire can be prevented as in the conventional device shown in FIG. fluctuations can be reduced as much as possible.

Further, both the wires 22 and 23 are overlapped vertically along the free edge 26a at the tip of the bracket 26, and their ends are fixed to the rear edge 26b and front edge 26c of the bracket 26, respectively. wire 42 necessary to move 26,
In principle, the minimum guide path length L2 for 43 is
It can be shortened by the front and back length of the bracket 26.

That is, like the conventional one shown in FIG.
When the ends of the front and rear wires are fixed directly to the front and rear edges of the bracket, the total length L1 of the lower rail and the minimum guide path length L2 of the wire are equal to distance x + bracket in order to move the sliding door by distance x. (L1
=L2>x+y), if the configuration is as shown in this embodiment, the total length L of the lower rail 3 is required to move the sliding door 2 by a distance x, as shown in FIG.
1 must be greater than the distance x + the longitudinal length y of the bracket 26 (L1>x+y), but in principle, the minimum guide path length L3 for the wires 22 and 23 is the distance x - the longitudinal length y of the bracket 26. It can be shortened to a length y, that is, (L3=x-y), so that L2>L3, and the size of the entire device, especially in the front-rear direction, can be reduced.

(Effects of the invention) As is clear from the above, according to the invention, 2
By overlapping the wires vertically along the free edge of the tip of the bracket and fixing their ends to the rear and front edges of the bracket,
The variation in the effective length of the wire due to the curved rail can be reduced as much as possible, and the minimum guide path length of the wire required to move the sliding door can be reduced compared to conventional ones. It can be shortened,
This has effects such as being able to downsize the entire device.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view of the main parts of an automobile equipped with the device of the present invention, Fig. 2 is a longitudinal cross-sectional view taken along the - line in Fig. 1, and Fig. 3 is a longitudinal sectional view taken along the - line in Fig. 2. A cross-sectional plan view, FIG. 4 is a cross-sectional plan view of the wire running portion cut along a horizontal plane parallel to the lower rail, and FIG.
6 is an exploded perspective view of the part where the wire is attached to the bracket; FIG. 7 is a schematic cross-sectional plan view showing the circuit path of the wire in the conventional device; FIG. 8 is an explanatory diagram showing the effects of the device of the present invention in comparison with the conventional device. A... Automatic opening/closing device, X... Fully closed position, Y...
Fully open position, 1... Vehicle body, 2... Sliding door, 3
...Lower rail, 4...Lower roller device, 7...
Motor, 8... Reduction device, 15... Excitation coil,
16... Winding drum, 21... Clutch, 2
2, 23...Wire, 26...Bracket, 32
...Guide piece, 34...Horizontal roller, 36...Vertical roller.

Claims (1)

[Scope of utility model registration request] An automatic opening/closing device for a sliding door for a vehicle that opens and closes the sliding door along a partially curved rail that is fixed to the vehicle body and faces approximately in the longitudinal direction, and is capable of being rotated forward and backward by an appropriate drive means. On the outer periphery of the winding drum installed on the car body,
One end of each of the two wires is wound in opposite directions to fix each end to the winding drum, and one end is guided so as to extend rearward from the front end of the rail. The other end of the wire is placed along the free edge and the trailing edge of the tip of the bracket that is provided on the sliding door and moves along the rail, facing toward the center of the vehicle body, and the end is fixed to the trailing edge. The other end of the other wire, which is attached to the rail and is guided to extend forward from the rear end of the rail, is placed along the free edge and front edge of the tip of the bracket, and the end is An automatic opening/closing device for a sliding door for a vehicle, characterized in that the device is fixed to the front edge.