JPH03140584A - Slide door structure of vehicle - Google Patents

Abstract

PURPOSE:To make a slide door structure compact by a method in which a spiral shaft is turned by a driver to allow a slide part to travel, and a four-joint link mechanism is turned around a supporting point in coordination with the slide part to open or close a door. CONSTITUTION:When a switch is closed and a power source circuit is connected to a power source, a closing switch is closed. An earthing circuit is then interrupted, and a drive motor 22 is operated through the power source circuit and the relay coil excited to close the relay contact. An electric current is then supplied to an actuator 23 through the power source circuit to turn a cam shaft 20 through a given angle. Also, a clutch part is rocked around a support shaft and a female screw is engaged with a spiral shaft 21 to allow the slide part 24 to move in the closing direction of door. A four-joint link mechanism 25 is turned around a joint 25a to close the slide door along a guide rail 4.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a sliding door structure that is slidable along a guide rail provided on a vehicle body.

(Prior Art) The rear seat side of a wagon-type vehicle is equipped with a sliding door that can be slid in the longitudinal direction of the vehicle body along guide rails provided on the vehicle body.
An automatic opening/closing drive mechanism has been proposed that opens and closes this type of sliding door by sliding it by operating a motor, air cylinder, or the like instead of the usual manual operation.

For example, in Japanese Patent Application Laid-Open No. 59-170381, a cable wrapped around a drive means installed at a predetermined position on the vehicle body is connected to a sliding door that is slidable along a rail attached to the vehicle body. discloses a technique for opening and closing the sliding door by running a cable in forward and reverse directions.

(Problem to be Solved by the Invention) By the way, in the above-mentioned device that automatically operates the sliding door connected to the cable by running the cable, it is necessary to suppress the bending of the cable running path as much as possible so that the cable runs smoothly. Therefore, it is required to tension the cable over a relatively wide area.

In other words, if you try to arrange the above cables in a compact space, there will be a part where the cable running path has a large bend, and the sliding resistance of the cable at the bend part will increase, making it difficult to open and close the sliding door. This is because, in addition to causing a decrease in performance, problems arise in which the cable sliding noise at the bent portion is unnecessarily increased. However, if the cable running path is provided wide as described above in order to avoid this problem, there is a risk that interference with other members installed on the vehicle may occur.

In addition, when the sliding door opening/closing mechanism uses a cable as described above, the cable stretches due to the traction force acting on the cable and changes over time, and due to this stretching, the sliding door cannot be opened and closed reliably. It will be hindered. In particular, when closing the door, at the final stage of sliding it along the guide rail, it is necessary to apply force to the sliding door to push it inward to the vehicle body to completely close the door. If there is a large amount of deflection, such as a cable, the cable cannot reliably draw the door inward into the vehicle body, and it is conceivable that complete closing cannot be expected.

Accordingly, the present invention provides a vehicle in which the sliding door can be installed in a limited space without causing interference with other components, the sliding door can be opened and closed smoothly and reliably, and the door can be completely closed when the door is closed. The challenge is to provide a sliding door structure for

(Means for Solving the Problems) The present invention is characterized by being configured as follows in order to cope with the above problems.

That is, the invention according to claim 1 of the present invention (hereinafter referred to as the first invention) is a structure of a sliding door that is slidable along a guide rail disposed on a vehicle body.
A driving means for causing a sliding member engaged with the helical shaft to travel in the sliding door moving direction by rotation of the helical shaft disposed along the moving direction of the sliding door, and one joint portion sandwiching the helical shaft. and a four-joint link mechanism that is pivotally supported and rotatable at a position opposite to the sliding door, and is connected to a joint located diagonally from the rotation center joint of the four-joint link mechanism. Ta1
The present invention is characterized in that two links are extended beyond the joint portion, the extended ends thereof are connected to the sliding door, and any other link other than these links is engaged with the sliding member.

Further, the invention according to claim 2 (hereinafter referred to as the second invention) provides a structure of a sliding door that is slidable along a guide rail provided on a vehicle body. The rotation of the helical shaft causes the sliding member engaged with the helical shaft to travel in the sliding door moving direction, and one joint part is arranged to rotate the sliding member at a position opposite to the sliding door across the helical shaft. a four-joint link mechanism supported and rotatable; one link connected to a joint located diagonally from the rotation center joint of the four-joint link mechanism; a connecting portion between the sliding door and the link connected thereto; Alternatively, it is characterized in that an auxiliary link is interposed at one of the connecting portions between the slide member and the link connected thereto.

(Function) According to the above-described first and second aspects of the present invention, as the helical shaft is rotated in the drive means and the slide member is run, the four-joint link mechanism is activated in conjunction with the slide member. By rotating about one joint part as a fulcrum, the sliding door connected to the four-joint link mechanism slides along the guide rail and is operated to open and close.

In that case, the mechanism that transmits the movement of the slide member to the slide door is a four-joint link mechanism, and the connection point between the slide door and the link mechanism is greater than the connection point between the slide member and the link mechanism. Since the link mechanism is located far from the rotation center joint, the amount of movement of the slide member is 4.
It is amplified by the rotational movement of the joint link mechanism and is transmitted to the sliding door. Therefore, the reciprocating length of the sliding member required to open and close the sliding door is shorter than the opening and closing stroke length of the sliding door, making it possible to keep the overall length of the drive means including the helical shaft short.

In addition, since the length of the helical shaft is shortened, the deflection of the shaft during installation is also reduced.
The sliding resistance of the slide member when running is reduced, and combined with the short running stroke, the running becomes smoother.
The running sound becomes very low.

Furthermore, since the movement of the sliding member is amplified by the four-joint link mechanism, even if the running speed of the sliding member, that is, the rotational speed of the helical shaft is low, the opening and closing speed of the sliding door can be maintained at an appropriate speed. By reducing the running speed, running noise can be further reduced, and the burden on the motor that controls the rotation of the helical shaft can be reduced.

In addition, since the anti-ride door is connected to the sliding member by a four-joint link machine ellipse and is driven to slide, this drive is ensured, and especially in the final stage of closing the sliding door, it is pushed into the vehicle body along the guide rail. At this time, the link mechanism retracts the door in conjunction with the movement of the door due to this pushing, making it possible to completely close the door.

Furthermore, according to the second invention, since the four-joint link mechanism and the slide member or the four-joint link mechanism and the slide door are connected via the auxiliary link, the slide door, the slide member, and the four-joint link mechanism are connected. The operational unmatching that occurs between the three can be absorbed by the rocking motion of the auxiliary link. Therefore, the unmatching caused by manufacturing dimensional errors and mounting errors of various members can be absorbed, and smooth and reliable opening/closing of the sliding door can be expected.

(Example) Embodiments of the present invention will be described below based on the drawings.

As shown in FIGS. 1 to 3, on the side of the vehicle body 1,
A sliding door 3 for opening and closing the rear passenger compartment 2 is attached so as to be slidable in the longitudinal direction of the vehicle while being guided by a guide rail group consisting of a lower rail, a center rail, and an upper rail, which will be described below.

The lower rail 4 is located in the longitudinal direction of the vehicle body, is fixed to the lower side surface of the vehicle body 1, and has a channel-like shape with a front end slightly curved toward the inside of the rear passenger compartment 2.
Corresponding to the lower rail 4, a guide roller 6 is supported by a guide bracket 5 below the front end of the inner panel 3b (shown in FIG. 4) forming the sliding door 3, and the guide roller 6 is transferred to the lower rail 4. freely engaged.

Further, the center rail 8 is fixed in the longitudinal direction of the vehicle body at a vertically approximately mid-height position of an outer panel 7a (shown in FIG. 2) forming the side surface of the vehicle body l, and its front end is slightly located inside the rear passenger compartment 2. It has a curved channel shape, and the sliding door 3 corresponds to the center rail 8.
A plurality of guide rollers 10.10 are supported by a guide member 9 at the rear end of the inner panel 3b, and these guide rollers 10.10 are freely engaged with the center rail 8.

The upper rail 13 is also made of channel material, and is fixed along the lower surface of the roof side reinforcement 12 that is joined to the side of the roof panel 11 (shown in FIG. 4) and extends in the longitudinal direction of the vehicle body. Its front end is slightly curved toward the inside of the rear passenger compartment 2. Then, corresponding to the upper rail 13, the sliding door 3
A guide roller 15 is supported by a guide arm 14 at the upper edge of the inner panel 3b, and the guide roller 15 is freely engaged with the upper rail 13.

For this reason, the sliding door 3 has each of the above-mentioned guide rails 4.
8.13 and can slide between the fully closed position and the fully open position, and when sliding toward the front of the vehicle body along the guide rail group 4.8.13 from the open state as shown in Figure 1, At the final stage of the movement in the closing direction, the guide rails 4, 8, and 13 move toward the inside of the vehicle following the curved portions of the front ends of the group. .

As shown in FIG. 1, at a predetermined position on the vehicle body 1 where the rear edge of the sliding door 3 comes into contact when the sliding door 3 is opened, there is a locking mechanism (described later) that controls the locking of the sliding door 3 in the closed state. A striker 16 is fixedly installed.

An opening/closing drive device 17 for opening and closing the sliding door 3 is installed on the inside of the vehicle with the lower rail 4 in between, and is supported on the lower surface side of the floor panel 18. That is, a pair of brackets 19a and 19b located opposite to each other in the longitudinal direction of the vehicle body.
is attached to the lower surface side of the floor panel 18, and the camshaft 2 is mounted across these brackets 19a and 19b.
0 and the spiral shaft 21 are in a parallel state, and both shafts)
20 and 21 are installed to freely rotate, and are provided with a forward/reverse drive motor 22 that rotationally drives the helical shaft 21 and an actuator 23 that rotates the camshaft 20 within a predetermined rotation range. The slide member 24, which has a built-in clutch mechanism, is engaged with the camshaft 20 and the helical shaft 21, and as the drive motor 22 is started from the ON state of the clutch mechanism, the slide member 24 moves toward the rear of the vehicle according to the direction of rotation of the motor. It is configured to run toward the side (door opening direction) or toward the front of the vehicle body (door closing direction).

The long rM closing drive device 17 has four links 25a to 25.
d is provided with a four-joint link mechanism 25 pivotally connected to the
One joint 26a on the side 25 of the joint link mechanism serves as a pivot point for the link mechanism 25, and a bracket is installed on the lower side of the floor panel 18 on the inside of the vehicle at a position opposite to the slide door 3 with the helical shaft 21 in between. One link 25b is rotatably supported through the joint 20 and connected to a joint 26b located diagonally with respect to the rotation center joint 26a, and extends beyond the joint 26b. The protruding end is connected to the slide door 3, and another link 25a connected to the link 25b is connected to the slide member 2.
It is connected to 4.

In this case, the link 25a and the slide member 24 are connected by inserting a pin 29 provided upright on the top surface of the slide member 24 into a long hole 28 formed in the middle of the link 25a. In contrast, the link 25a is capable of swinging and sliding. Also link 25b
The connection between the slide door 3 and the slide door 3 is achieved by attaching a bracket 30 to the lower end of the front side of the outer panel 3a of the door 3, and connecting the extending free end of the link 25b to this with a pin 31 for free rotation. There is. Therefore, in the opening/closing drive device 17, when the sliding member 24 runs toward the rear of the vehicle body when the sliding door 3 is closed as shown in FIG.
The 4-joint link mechanism 25 acts laterally through the engagement portion with the 8, and as it travels, the 4-joint link mechanism 2 uses the joint 26 as a fulcrum.
5 are bent and rotated in the same direction, and the sliding door 3 slides in the opening direction. Similarly, when the slide member 24 travels in the opposite direction, the member 24
The movement of the sliding door 3 is by the 4-joint link machine lateral 25
This will cause the door 3 to slide in the opening direction. Then, when the linear motion of the slide member 24 is converted into a rotational motion of the four-joint link mechanism 25, a change in the relative positional relationship between the slide member 24 and the link 25a causes the pin 28 in the elongated hole 29 to change. Absorbed by relative sliding motion.

Note that the link engaged with the slide member 24 may be 25c or 25d in addition to the link 25a.

Furthermore, the slide member 24 is provided with a clutch device $1 that engages and disengages the member 24 from the helical shaft 21 as necessary.
132 is built-in. This clutch mechanism 32
To explain based on the figure and FIG. 6, the slide member 2
A support shaft 33 is fixed on the lower surface of the center of the slide member 24 in parallel with the spiral shaft 21 and the camshaft 20, and a clutch member 34 supported by the support shaft 33 in a vertically swingable manner It is housed in a recess 24a formed in the section.

The clutch member 34 is always urged into the position shown by the solid line in FIG. 6 by a pair of coil springs 35 and 35 interposed between both sides of the member 34 and the slide member 24. A convex portion 34a that abuts the outer peripheral portion of the camshaft 20 is integrally formed on one side of the clutch member 34, and a female screw portion 34b that engages with the helical shaft 21 is integrally formed on the other side. Then, the convex portion 34a is pushed against the camshaft 2 by the biasing force of the coil spring 35.35.
The cam shaft 2 is maintained in a state where it enters the cam recess 20a at 0, and from this state the camshaft 2 is moved by the actuator 23 described above.
0 is rotated by a predetermined angle as shown by the chain line in FIG. The female threaded portion 34b is configured to engage with the helical shaft 21. Therefore, if the helical shaft 21 is rotated in the forward and reverse directions by the drive motor 22 from this state, the slide member 2
4 reciprocates along the camshaft 20 and the spiral shaft 21.

FIG. 7 shows the drive motor 22 and actuator 23.
The circuit 56 is a drive circuit that operates the drive motor 22 and the ground 36.
The first and second grounding circuits 37 and 38 of the system, and the main power circuit 3
The first and second power supply circuits 41 and 42 are connected to the power supply 40 via the power supply circuit 9, and each opening switch 43 for closing the sliding door 3 is provided in series with the first grounding circuit 37.
a, 43b, 43c, opening switches 44a, 44b, 44c for opening the sliding door 3, which are also provided in series with the second grounding circuit 38, and the first and second power supply circuits 41.
．． The third and fourth power supply circuits 45.
46, fifth and sixth power supply circuits 47.48 also connected to the first and second power supply circuits 41.42, and an open switch 43b provided midway between the third and fourth power supply circuits 45.46.
and a changeover switch 49 for controlling whether to operate the open switch 44b, and fifth and sixth power supply circuits 47.4.
A changeover switch 5 is provided in the middle of the switch 8 and controls whether or not the opening switch 43c and the opening switch 44c are operated.
0.

Furthermore, the main power supply circuit 39 includes the aforementioned actuator 23.
is connected, and a relay 51 that controls the energization state of the actuator 23 is interposed in the middle of the second grounding circuit 38 . The ground circuit 38 also includes the sliding door 3
a switch 52 that stops operation of the drive motor 22 by opening the circuit 38 when the motor reaches a predetermined position;
is provided, and the operation of this switch 52 is linked to a position detection sensor (not shown) such as a limit switch that detects the open and closed states of the slide door.

Therefore, when the changeover switches 49 and 50 are closed and the third and fifth power supply circuits 45.47 are connected to the power supply 40, the mm switches 43a, 43b, 43c
By turning on any one of them, the first grounding circuit 37 is cut off, and the first, third, fifth power supply circuits 41, 45, .
47, the drive motor 22 is rotationally driven, the coil 51a of the relay 51 is excited, and the relay contact 51b is closed, whereby the main power circuit 39
The actuator 23 is energized via the actuator 23 . Accordingly, the camshaft 20 rotates by a predetermined angle, and the clutch member 34
swings around the support shaft 33, and the female screw portion 34b engages with the helical shaft 21, causing the slide member 24 to travel in the door closing direction.

Also, the changeover switches 49 and 50 are closed and the fourth
, when the sixth source circuit 46, 48 is connected to the power supply 40, the second ground circuit 38 is opened by turning on any one of the switches 44a, 44b, 44c,
and the drive motor 22 is connected to the power supply 40 via any one of the second, fourth, and sixth power supply circuits 42, 46, 48,
The drive motor 22 is energized in a direction opposite to that described above and is driven to rotate, and the relay coil 51a is excited.
Power source 40 is applied to actuator 23 . Accordingly, the female threaded portion 34b of the clutch member 34 is connected to the helical shaft 2.
0, and the slide member 24 travels in the door opening direction.

The first and second power supply circuits 41 and 42 are each equipped with controllers 53 and 54 made of variable resistors in order to control the driving of the drive motor 22 and vary the opening and closing speed when the sliding door 3 is opened and closed. Ru.

In addition, a cam actuation switch 55 is interposed in the main power circuit 39 in preparation for use mainly when manually operating the door. When the switch 55 is turned on arbitrarily, the actuator 23 is actuated and the clutch member 33 is actuated. It is configured to be able to mesh with the helical shaft 21. For example, it can be used for sliding doors on slopes, etc.
When manually opening and closing the r!, the switch 55 is turned on midway through, the clutch member 34 is engaged with the helical shaft 21, and the sliding door 3 is opened and closed. It is conceivable that the lock may be locked while Ii is being closed.

Further, in this embodiment, a closing mechanism 60 is provided to reliably move the sliding door 3 toward the inside of the vehicle body at the final stage when the sliding door 3 slides in the closing direction. As shown in FIG. 8, this mechanism 60 is installed across the rear edge 3c of the sliding door 3 and the opposite side of the vehicle body 1 when the sliding door 3 is closed.

This closing mechanism 60 includes a drive motor 61 mounted between an outer panel 7a and an inner panel 7b on the vehicle body side, a reducer 62 connected to the drive motor 61, and a shaft 63 that is freely rotatable around a support shaft 63. The output shaft 62 of the reducer 62 is supported by the link members 64a and 64b.
a hook lever 65 connected to a, an engaging pin 67 fixed to the rear end edge 3C of the sliding door 3 via a support bracket 66, and an engaging pin 67 connected to the sliding door 3 when the sliding door 3 is moved.
A limit switch 6 as a door position sensor that controls the energization state of the drive motor 61 by contacting the limit switch 6
8, and the hook lever 65 and limit switch 68 are arranged facing the engagement bin 67 through the vehicle body side opening 1a. Then, the switch 68
7, the drive motor 61 is energized.

Note that at the rear end of the rotating shaft 61 of the drive motor 61,
The coil spring 6 always biases the shaft 61a in a predetermined direction, thereby retracting and holding the hook lever 65 at the position 1 shown by the solid line when the drive motor 61 is not energized.
9 is wrapped around it.

Further, the closing mechanism 60 is provided with a control switch 70 for controlling the energization state of the drive motor 61. As shown in FIG. 9, this control switch 70 detects the movement of a hook lever 72 and a claw lever 73 on the door side, which are installed in correspondence with the striker 16 shown in FIG. 1, and performs the above control. A first control switch 70a and a second control switch 70b are arranged near the sides of the hook lever 72 and the claw lever 73, respectively, which constitute the locking mechanism 71 that locks the sliding door 3 in the closed state. Consisting of When both of these control switches 70a and 70b are in the OFF state, the drive motor 61 can be energized, and when both of the control switches 70a and 70b are in the ON state, the drive motor 61 can be energized. is being prevented. In addition, as shown in FIG. 1, a pair of foreign object sensors 74 and 74 for driving and controlling the drive motor 61 are provided.

Here, to briefly explain the locking mechanism 71, the ninth
As shown in Figure (1), the hook lever 72 and the claw lever 73 are each disposed on the rear edge side of the sliding door 3, and the hook lever 72 is rotatably supported by a support shaft 75. It is biased in the direction of arrow A by a biasing member (not shown). Further, when the sliding door 3 is opened, the engagement groove 72a of the hook lever 72 is arranged to face the striker 16.

On the other hand, the claw lever 73 is rotatably supported by a support shaft 76 and biased in the direction of arrow B by a biasing member (not shown). At the same time, the second control switch 70b is brought into contact with the second control switch 70b to turn it on.

As shown in FIG. 9(I), the hook lever 7 is moved inward when the sliding door 3 is closed.
After the engagement groove 72a of No. 2 comes into contact with the striker 16,
In conjunction with the rotation in the opposite direction of arrow A, the claw lever 73 rotates as shown by the chain line, and the lever 73 separates from the second control switch 70b, causing the first and second control switches 7°a to rotate. , 70b are turned off, the drive motor 61 can be energized. After that, Fig. 9 (II
), the engagement groove 72a of the hook lever 72 completely engages with the striker 16, and the tip 73a of the claw lever 73 engages with the engagement portion 72b formed on the outer periphery of the hook lever 72. As a result, rotation of the hook lever 73 is restricted. As a result, the striker 16 is held in the locked state, and the sliding door 3 is similarly locked in the open state. In this locked state, the respective levers 72 and 73 come into contact with the control switches 70a and 70b, and both are turned on, thereby cutting off the power supply to the drive motor 61.

Further, the aforementioned foreign object sensors 74, 74 serve to prevent the drive motor 61 from being driven when a foreign object is detected prior to the door closing operation. In this way, the drive motor 61 is configured to be controlled by the limit switch 68, the control switch 70, and the foreign object sensor 74.

Now, these limit switch 68 and control switch 7
0 and the behavior of the foreign object sensor 74
Assuming that a controller (not shown) is provided to control the drive of the controller 1, the control operation of the controller in that situation will be explained using the flowchart of FIG. mm switches 43a, 43b, 43C forming the drive circuit 56 shown
Find out whether any one of them is in the ON state, and
When it is determined that the limit switch 68 is in the N state, a determination is made as to whether the limit switch 68 is ON or OFF, and based on the determination that the switch is in the ON state (door closed),
In step ss, it is determined whether or not the foreign object sensor 74.74 is in the OFF state. In s4, it is determined whether both control switches 70a and 70b are in the OFF state. If both switches 70a and 70b are in the OFF state, the drive motor 61 is energized in step s5. According to this energization, the rotational force of the drive motor 61 taken out through the reducer 62 is input to the hook lever 65 through the link members 64a and 64b, and the hook lever 65 rotates. This rotation causes the hook lever 65 to engage with the engagement pin 67 from the outside of the vehicle, thereby pushing the pin 67 inward toward the vehicle interior, thereby preventing the slide door 3 from moving inward. Assisted.

Thereafter, the controller, in step S6,
It is determined whether or not the second control switches 70a and 70b are in the ON state, and if the second control switches 70a and 70b are in the ON state, that is, the sliding door 3 is securely locked in the closed state, the energization to the drive motor 61 is terminated in step S7. .

On the other hand, with the end of this energization, the force of the coil spring 69 shown in FIG. to return to the original state shown by the solid line.

In the structure of this embodiment as described above, for example, when the sliding door 3 is in the closed state as shown by the solid line in FIG. 2, the actuator 23 engages the clutch member 34 of the clutch mechanism 32 with the helical shaft 21, When the helical shaft 21 is rotated by the drive motor 22, the slide member 24 moves toward the rear of the vehicle body. This traveling movement is transmitted to the four-joint link machine ellipse 25 by the engagement between the bin 29 and the elongated hole 28, and is also transmitted to the sliding door 3 by the link mechanism 25 similarly rotating toward the rear of the vehicle body. The door 3 has a guide rail 4.8.13
Guided by the group, it slides in the opening direction. In this case, the engagement point at which the driving force is input to the four-joint link mechanism 25 at the pin 29 of the slide member 24 is
From the point where the driving force is input to the sliding door 3, that is, the connection point between the extending free end of the link 25b and the door side connection bracket 30, the rotation center joint part 2 of the four-joint link mechanism 25
It is located closer to 6a. Therefore, the slide member 2
The rotational speed at the extending free end of the link 25b is faster than the traveling speed of the slide member 24, and the traveling speed of the slide member 24 is amplified and transmitted to the sliding door 3 via the four-joint link mechanism 25. As a result, the sliding speed of the sliding door 3 becomes faster than the traveling speed of the sliding member 24. Therefore, if the four-joint link machine 11125 is not used, the opening/closing stroke length of the sliding door 3 is l.
The traveling length 2 of the slide member 24, which needs to travel the same distance as -1 (shown in FIG. It can also be shortened, which allows WRW! The drive device 17 can be configured compactly.

In addition, since the longitudinal length of the camshaft 20 and the spiral shaft 21 is shortened, the deflection of these shirts 20 and 21 when installed on the brackets 19a and 19b is reduced, and the sliding resistance of the slide member 24 when running is reduced. This, combined with the short travel length L2, makes the sliding door 3
The slide drive of the slide member 24 can be performed smoothly, and the slide member 24
The running sound of the car is reduced.

Furthermore, since the movement of the slide member 24 is amplified by the horizontal 25 of the four-joint link machine and transmitted to the slide door 3, the sliding speed of the slide door 3 increases relative to the traveling speed of the slide member 24. As a result, the traveling speed of the slide member 24,
In other words, even if the rotational speed of the helical shaft 21 is low, the opening/closing speed of the sliding door 3 can be maintained at an appropriate speed, the running speed of the sliding member 24 can be suppressed, further reducing running noise, and the drive motor 22 can be The load on the motor 22 can be reduced by enabling low rotation.

In addition, since the sliding door 3 is connected to the sliding member 24 by a link mechanism, the input of driving force to the door 3 is reliable, and especially in the final stage of closing the sliding door, the aforementioned closing mechanism 60 closes the sliding door. 3 into the vehicle body, the movement of the door 3 due to this pushing is reliably transmitted to the four-joint link machine side 25, and the response of the link mechanism 25 moves the sliding door 3 towards the guide rails 4, 8, 13 group. It can be drawn in well along the curved part of.

FIG. 11 shows a second embodiment of the invention, in which four links 1
When connecting the four-joint link mechanism 125 consisting of 25a to 125d with the slide member 24, the slide member 24 and the link 125a to be connected are connected by a swinging link 80 whose both ends are pivotally connected to both. By doing so, the engagement structure between the elongated hole 28 and the bottle 29 in the first embodiment is replaced.

In this embodiment as well, for example, if the helical shaft 21 is rotated from the state where the sliding door 3 is closed and the slide member 24 is made to run toward the rear of the vehicle body along the helical shaft 21, the running force is The signal is transmitted to the side 125 of the four-joint link mechanism through the dynamic link 80, and also acts on the slide door 3 connected to the four-joint link mechanism 125, causing the door 3 to slide in the opening direction and vice versa. When the slide member 24 moves toward the front of the vehicle body, the slide door 3 slides in the opening direction via the four-joint link machine side 125.

Also in this case, as a result of the movement of the slide member 24 being amplified by the four-joint link mechanism 125, the movement of the slide member 24 is larger than the opening/closing stroke amount L1 of the slide door 3.
The traveling distance N L 2 of the opening/closing drive device 117 including the camshaft 20 or the helical shaft 21 can be shortened to make the device more compact. It is possible to reduce noise and reduce the load on the drive motor 22.

Particularly, with the structure of this second embodiment, the opening/closing operation of the sliding door 3 by the opening/closing drive device 117 can be performed more smoothly and accurately. That is, the sliding trajectory of the sliding door 3 when it is opened and closed is regulated by the guide rails 4, 8, and 13 groups. Further, the travel locus of the slide member 24 is regulated by the camshaft 20 or the spiral shaft 21,
The rotation locus of the joint link mechanism is the joint portion 26 which is the rotation fulcrum.
The attachment of a is restricted depending on the position and the like. Therefore, the sliding door 3, the opening/closing drive device 117, and the four-joint link mechanism 125 are designed with the above relationships in mind. Due to errors etc. sliding door 3,
There is a possibility that operational unmatching will occur between the opening/closing drive device 117 and the four-joint link machine n4125, and when this unmatching occurs, it is also possible that the smooth opening/closing operation of the sliding door 3 will be hindered. It will be done. However, in this second embodiment, even if the unmatching occurs, the sliding member 24 that generates the door opening/closing driving force;
Since the link 125a of the four-joint link mechanism 125 is connected to the link 125a by the swing link 80, the unmatching that occurs between the slide member 3, the sliding door 3, and the four-joint link machine ellipse 125 can be prevented by the swing link 80. It can be absorbed by shaking. Therefore, smooth and appropriate rM idle driving of the sliding door 3 can be obtained regardless of unmatching.

FIG. 12 shows a third embodiment of the present invention, which is designed to absorb unmatching in the same manner as the second embodiment.
A four-joint link mechanism 225 consisting of 5a to 225b,
The four-joint link mechanism 225 and the slide member 24 are connected to each other through a long hole 228 opened in the link 225a and the slide member 24, as in the first embodiment. by engagement with the bin 229.

In this embodiment as well, the operational unmatching that occurs between the slide door 3, the slide member 24, and the four-joint link mechanism 225 can be prevented by interposing the link 225b between the free end of the link 225b and the door-side bracket 30. This will be absorbed by the swinging of the swinging link 81. Note that this embodiment structure allows the a-opening drive device 217 to be made more compact, reduces the running noise during door opening/closing operation, and Of course, this can reduce the burden on people.

(Effects of the Invention) As is clear from the above description, according to the present invention,
The length of the helical shaft of the drive device that opens and closes the sliding door can be made shorter than the opening and closing stroke length of the sliding door, making the opening and closing drive device more compact, eliminating interference with other installed components, and making it easier to install the device in a vehicle. In addition to improving performance, the running noise of the slide member can be reduced. Further, when the sliding door is closed, the door can be pushed into the vehicle body easily and reliably, and the sliding door can be completely closed easily.

Furthermore, in the second invention, the unmatching that occurs between the sliding door, the slide member, and the four-joint link mechanism can be absorbed by the auxiliary link, so that the sliding door can be opened and closed smoothly and accurately. can.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention, and FIG. 1 is a schematic perspective view of an automobile to which the sliding door structure of the first embodiment is applied, and FIG.
The figure is an enlarged sectional view of the main part of Fig. 1, Fig. 3 is a perspective view of the opening/closing drive device, Fig. 4 is a large sectional view taken along the line IV-IV in Fig. 1, and Fig. 5 is a longitudinal sectional view of the slide member. , Figure 6 is the ■− of Figure 5.
■ Line sectional view, Figure 7 is a drive circuit diagram of the open m drive device, Figure 8
The figure is a plan view of the closing mechanism, Figures 9(I) and <II) are schematic configuration diagrams of the locking mechanism provided with control switches that control the operation of the closing mechanism, and Figure 10 is the control operation for the closing mechanism. Flowchart diagram showing an example of
FIG. 1 is a plan view of a W# opening/closing drive mechanism showing a second embodiment of the invention, and FIG. 12 is a plan view of an opening/closing drive mechanism showing a third embodiment of the invention. 1... Vehicle body, 3... Sliding door, 4, 8.13.
...Guide rail, 17,117,217...Slide member driving means (opening/closing drive device), 21...Spiral shaft, 24...Slide member, 25.125.225
...4-joint link mechanism, 25a, 25b, 125a,
125b, 225a', 225 b--link,
26a, 26b--Joint portion, 80.81--Auxiliary link (swing link).

Claims (2)

[Claims] (1) A structure of a sliding door that is slidable along a guide rail provided on a vehicle body, and the sliding door is engaged with the spiral shaft by rotation of a spiral shaft arranged along the moving direction of the sliding door. a slide member driving means for moving the combined slide members in the sliding door moving direction; and a four-joint link in which one joint is rotatably supported at a position opposite to the slide door across the helical shaft. mechanism, one link connected to a joint located diagonally from the rotation center joint of the four-joint link mechanism is extended beyond the joint, and the extended end is connected to the sliding door. A sliding door structure for a vehicle, characterized in that the sliding door structure is connected to the sliding member, and any link other than the link is engaged with the sliding member. (2) A structure of a sliding door that is slidable along a guide rail provided on the vehicle body, in which rotation of a helical shaft arranged along the moving direction of the sliding door engages the helical shaft. a slide member driving means for moving the combined slide members in the sliding door moving direction; and a four-joint link in which one joint is rotatably supported at a position opposite to the slide door across the helical shaft. mechanism, one link connected to a joint located diagonally from the rotation center joint of the four-joint link mechanism is extended beyond the joint, and its extending end is slid. Connecting to the door and connecting any link other than the link to the sliding member, the connecting part between the sliding door and the link connected to this, or the connecting part between the sliding member and the link connected to this A sliding door structure for a vehicle, characterized in that an auxiliary link is interposed in one of the parts.