JP2840365B2 - Vehicle sliding door structure - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a sliding door structure for a vehicle.

2. Description of the Related Art Conventionally, in a wagon-type vehicle, a sliding door that is slidable in the front-rear direction of a vehicle along a guide rail provided on a side surface of the vehicle is provided as a rear seat side door. (For example, see JP-A-59-1
No. 70381).

As such a method of driving the opening and closing of the slide door, for example, as disclosed in the above-mentioned known example, a motor as a driving means and a driving force transmitting means for transmitting a driving force from the motor to the door side are used. And a cable that opens and closes a door via the cable.

(Problems to be Solved by the Invention) By the way, for example, in a device having such a cable-type driving force transmitting means, it is conventionally generally arranged that the driving force transmitting means is exposed on the lower surface side of the vehicle body. However, in such a case, the driving force transmitting means and the like are likely to be damaged by contact with an obstacle on the road surface when the vehicle is running, and the driving force transmitting means and the like are liable to be damaged by muddy water from the road surface. Operation may be hindered, and there is room for improvement in terms of operational reliability and durability.

Accordingly, the present invention proposes a sliding door structure for a vehicle in which damage to a driving unit and a driving force transmitting unit and occurrence of flood damage to the driving unit and the driving force transmission unit are prevented as much as possible to improve reliability and durability. It was made for the purpose of.

(Means for Solving the Problems) In the present invention, as a specific means for solving such problems, as a vertical means between a side sill opened at the side of the vehicle body and having a lower end extending in the front-rear direction of the vehicle body and a vehicle cabin floor. In the opening defined by the step portion provided at the intermediate position in the direction, supported by a guide rail mounted in the vicinity of the opening toward the vehicle longitudinal direction, and moved in the vehicle longitudinal direction along the guide rail. In a slide door structure of a vehicle, in which a slide door is enabled and the opening can be opened and closed by the slide door, the slide door is disposed between the side sill and the step portion in a vehicle front-rear direction and A helical shaft whose both ends in the axial direction are rotatably supported, and a drive motor for driving the helical shaft to rotate are arranged. The slide door is connected to a slide member that is moved in the axial direction with the rotation of the spiral shaft, and the slide door is opened and closed by the movement of the slide member with the rotation of the spiral shaft. And

(Operation) Since the drive motor and the helical shaft are not exposed to the lower surface of the vehicle body in the present invention, the drive motor and the helical shaft may come into contact with an obstacle on the road surface while the vehicle is running, or may be disengaged from the road surface. Or muddy water is prevented from occurring.

(Effect of the Invention) Therefore, according to the sliding door structure of the vehicle of the present invention,
The extremely simple structure in which the drive motor and the helical shaft are housed and arranged in the space between the side sill and the step portion of the vehicle body makes it possible to effectively use the space, and damages the drive motor and the helical shaft and damages to the water. Is prevented from occurring,
Good opening and closing operation of the sliding door is maintained for a long time, and its operational reliability and durability are improved.

Further, since the drive motor and the spiral shaft are arranged on the vehicle body side and the spiral shaft and the slide door are connected via the slide member, for example, when the drive motor, the spiral shaft and the like are arranged on the slide door side, In comparison, the weight of the movable part including the sliding door is small, and the sliding door can be moved lightly, and the opening and closing operability is improved.

Hereinafter, a sliding door structure of a vehicle according to an embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows the left side of a vehicle body 1 of a van type vehicle having a sliding door structure according to an embodiment of the present invention. An opening 1a for getting in and out of the rear compartment 2 is formed in a side surface of the vehicle body 1. A lower end of the opening 1a is provided with a side sill 19 having a closed cross section extending in the longitudinal direction of the vehicle body.
Is defined by a step portion 20 provided at an intermediate position in the vertical direction between the vehicle compartment floor 18 and the opening portion.
1a is opened and closed by a slide door 3 which is slidable in the longitudinal direction of the vehicle body. In this case, in order to support the slide door 3 so as to be slidable in the longitudinal direction of the vehicle body, a side surface of the vehicle body 1 is provided as described later. In addition, three guide rails 4, 8, 13 are provided at appropriate intervals in the vertical direction.

That is, FIG. 1 and FIG.
As shown in the figure, there is provided a channel-shaped lower rail 4 which extends in the front-rear direction of the vehicle body and whose front end is slightly curved toward the inside of the rear compartment 2. As shown in FIGS. 2 and 3, the lower rail 4 is rotatably mounted on the upper surface of a guide bracket 5 fixed below the front end of an inner panel 3b forming the slide door 3. The guide roller 6 is engaged.

An outer panel forming a rear side surface of the vehicle body 1;
A channel-shaped center rail 8 extending in the front-rear direction of the vehicle body and having a front end slightly curved inside the rear compartment 2 is fixedly provided substantially at the center in the vertical direction of 7a. The center rail 8 includes the slide door 3.
A plurality of guide rollers 10, 10 rotatably mounted on a guide member 9 rotatably supported at the rear end of the inner panel 3b (see FIG. 3) are engaged.

Further, a lower surface of a closed side roof reinforcement 12 (see FIG. 2) which is joined to a side portion of the roof panel 11 of the vehicle body 1 and extends in the vehicle front-rear direction,
A channel-shaped upper rail 13 is fixed along this. Like the lower rail 4 and the center rail 8, the upper rail 13 has a front end portion at the rear casing 2.
Is slightly curved toward the inside. The upper rail 13 is provided with a guide roller rotatably mounted on the upper surface of a guide arm 14 fixed to the upper edge of the inner panel 3b (see FIG. 2) of the slide door 3.
15 are involved.

By supporting the slide door 3 by these three guide rails 4, 8, and 13, the slide door 3 is attached to the side of the outer panel 7a forming the rear side surface of the vehicle body 1 as shown by the solid line in FIG. The door is in the opened state, and the door is slid forward from the opened state along the guide rails 4, 8, and 13, and at the final stage, the front end of each of the guide rails 4, 8, and 13 is bent. The door can be moved between a closed state (a state shown by a dashed line in FIG. 3) and an inner side (a rear compartment 2 side) along the shape.

As shown in FIG. 1, when the slide door 3 is closed, an opening 1a of the vehicle body 1 with which the rear end edge of the slide door 3 contacts.
At a predetermined position, a striker 16 which constitutes a part of a lock mechanism described later that locks the slide door 3 in a closed state.
Is installed.

On the other hand, an opening for opening and closing the slide door 3 is provided.
In a position below 1a, an opening / closing drive device X described later is provided with a vertical wall connecting the floor panel 18 forming the floor surface portion of the vehicle body 1 and the side sill 19 in the vertical direction, as shown in FIGS. It is arranged so as to be located below the step portion 20 whose one side is joined to the portion 19a. The opening / closing drive device X includes a helical shaft 22 and a camshaft 23 whose both ends are rotatably supported by a pair of front and rear support brackets 21 fixed to the lower surface of the step portion 20, respectively.
A drive motor 24 fixed to the one support bracket 21 and rotating the helical shaft 22; and a solenoid valve and the like fixed to the one support bracket 21 and rotating the camshaft 23 within a predetermined range. An actuator 25, a slide member 26 engaged with the shafts 22, 23 and moving in the vehicle longitudinal direction along the axial direction with the rotation of the spiral shaft 22, and one end of the slide member 26 is connected to the slide member 26. The other end is constituted by a link member 27 which is pivotally attached to the distal end of the guide bracket 5 to interconnect the slide member 26 and the slide door 3 side. The slide member 26 moves along the spiral shaft 22 with the rotation of the spiral shaft 22, so that the slide door 3 connected to the slide member 26 via the link member 27 moves in the vehicle longitudinal direction. It can be slid.

Further, the slide member 26 has
The clutch mechanism Y described below is provided for engaging and disengaging the spiral shaft 22 as needed. This clutch mechanism Y
As shown in FIG. 4 to FIG.
Above the helical shaft 22 and the camshaft 23
The clutch member 30 described later is swingably supported on a support shaft 29 arranged in a direction parallel to the direction of the arrow. The clutch member 30 has an outer peripheral surface 23 of the cam shaft 22 on one side thereof.
A convex portion 30a that abuts on a, and a female screw portion 30b that meshes with the helical shaft 22 are integrally formed on the other side. And this clutch member 30
The pair of left and right coil springs 31, 31 interposed between the slide member 26 and the pair of left and right coil springs 31 always connect the convex portion 30a to the concave portion 23a
It is urged so as to maintain the state of having entered the inside.
Therefore, the camshaft 23 is actuated by the actuator 25.
Is rotated by a predetermined angle so that the clutch member
The protrusion 30a of the cam 30 comes into contact with the outer peripheral surface 23a of the camshaft 23 and is pushed downward. ). With the rocking displacement of the clutch member 30 at this time, the female screw portion 30b formed on the other side meshes with the helical shaft 22, whereby the helical shaft 22 and the slide member 26 are in a screw engagement state. Become.

Therefore, in this state, by rotating the spiral shaft 22 in either the forward or reverse direction by the drive motor 24,
The slide member 26 reciprocates in the axial direction along the spiral shaft 22, and the slide door 3 is slid between the closed state and the closed state.

As described above, when the opening / closing drive device X is arranged in the space between the side sill 19 and the step portion 20 instead of the lower surface side of the vehicle body 1 as in the related art, the opening / closing drive device X becomes Because it is not exposed to the side, the opening and closing drive device X is prevented from being damaged by contact with an obstacle on the road surface side during traveling, or being covered with muddy water from the road surface side, and is reliably and reliably prevented. As a result, the operational reliability and durability of the opening / closing drive device X are improved.

Here, an electric circuit for operating the drive motor 24 and the actuator 25 will be described with reference to FIG. 9. This electric circuit 32 is a two-system system for connecting the bipolar portion of the drive motor 24 and the ground 33, respectively. First and second ground circuits
34, 35, first and second power supply circuits 38, 39 connected to a power supply 36 via a main power supply circuit 37, and third and second power supply circuits 38, 39 connected to the first and second power supply circuits 38, 39, respectively. 4th power supply circuit 4
2 and 43, and fifth and sixth power supply circuits 44 and 45 also connected to the first and second power supply circuits 38 and 39, respectively. The first grounding circuit 34 is provided with closing switches 40a, 40b, and 40c for closing the slide door 3, and the second grounding circuit 35 is provided with respective opening switches for opening the slide door 3. Switches 41a, 41b, and 41c are provided. Further, a changeover switch 46 for controlling whether or not the closing switch 40b and the opening switch 41b are operated is provided in the middle of the third and fourth power supply circuits 42 and 43, and the fifth and sixth power supply circuits 42 and 43 are provided. A changeover switch 47 for controlling whether the close switch 40c and the open switch 41c are operated is provided in the middle of the power supply circuits 44 and 45.

In this embodiment, the closing switch 40a, the opening switch 41a, and the changeover switches 46 and 47 are provided on the driver's seat side.
The closing switch 40b and the opening switch 41b are arranged at a position near the sliding door in the vehicle interior, and the closing switch 40c and the opening switch 41c are arranged at a position near the sliding door outside the vehicle interior, respectively, from any of these positions. The operability is improved by opening and closing the slide door 3.

On the other hand, the main power supply circuit 37 is provided with a relay 53 for controlling the opening and closing of the main power supply circuit 37 itself in response to a signal from a stop sensor 51 for detecting the stop state of the vehicle. Only the coil 53a of the relay 53 is excited, the contact 53b is closed, and power can be supplied to the main power supply circuit 37. Therefore, even if the slide door 3 is erroneously opened while the vehicle is running, the slide door 3 is not opened, and the safety is ensured. As a method of detecting the stopped state of the vehicle, for example, a method of determining whether the parking brake is applied, a method of determining whether the transmission lever is set to the neutral position, or a method of determining whether the vehicle speed is "0" It is possible to determine whether or not it is the case. Either of these methods can achieve the intended purpose, but from the viewpoint of ensuring higher reliability, all three methods are taken into consideration. It is desirable to do.

Further, an actuator 25 for rotating the cam shaft 23 is connected to the main power supply circuit 37. A relay 48 for controlling the energization state of the actuator 25 is provided in the middle of the second grounding circuit 35. The second grounding circuit 35 detects an open state and a closed state of the slide door 3. A switch 49 is provided for stopping the operation of the drive motor 24 when the slide door 3 reaches a predetermined position (open position and closed position) by a position detection sensor (not shown) such as a limit switch. Therefore, when the changeover switches 46 and 47 are closed and the third and fifth power supply paths 42 and 44 are connected to the power supply 36, any one of the closing switches 40a, 40b and 40c is used. By turning on the power supply, the first ground circuit 34 is cut off, and the power supply 36 and the drive motor 24 are connected via one of the first, third, and fifth power supply circuits 38, 42, and 44. The connection is made and the drive motor 24 rotates. At the same time, the coil 48a of the relay 48 is excited and the contact 48b of the relay 48 is closed, so that the actuator 25 is energized via the main power supply circuit 37. Accordingly, the cam shaft 22 rotates by a predetermined angle, the clutch member 30 swings about the support shaft 29, and the female screw portion 30b of the clutch member 30 Mesh. As a result, the slide door 3 moves integrally with the slide member 26 in the closing direction.

Similarly, when the changeover switches 46 and 47 are closed and the fourth and sixth power supply circuits 43 and 45 are connected to the power supply 36, any one of the open switches 41a, 41b and 41c is used. When one of them is turned on, the second ground circuit 35 is opened, and the drive motor 24 is connected to the power supply 36 via one of the second, fourth, and sixth power supply circuits 39, 43, and 45. As a result, the drive motor 24 rotates in the opposite direction to the above. At this time, since the coil 48a of the relay 48 is excited and the contact 48b of the coil 48 is closed, the main power supply circuit 3
7, the actuator 25 is energized, and the female screw portion 30b of the clutch member 30 meshes with the helical shaft 22 in the same manner as described above, whereby the slide member 26 moves in the opposite direction to the above and opens the slide door 3 in the opening direction. Move to

When none of the closing switches 40a, 40b, 40c and the opening switches 41a, 41b, 41c is operated, the slide door 3 can be opened and closed manually.

The first and second power supply circuits 38 and 39 have a drive motor 2
A controller comprising a variable resistor for controlling the operation of 4 to make the opening / closing speed of the sliding door 3 variable when opening / closing.
50A and 50B are provided respectively. Further, a switch 52 is provided in the middle of the main power supply circuit 37. By turning on the switch 52 as needed, the actuator 24 is operated to move the clutch member 30 to the spiral shaft.
22 can be meshed. Therefore, for example, when the slide door 3 is manually opened / closed on an inclined ground or the like, the switch 52 is turned on in the middle thereof, so that the clutch member 30 meshes with the helical shaft 22 and opens / closes the slide door 3 during the opening / closing. The stop can be reliably held. As a result, when the slide door 3 is released from the hand, the slide door 3 does not open and close inadvertently, and the safety at the time of opening and closing the slide door 3 is improved accordingly.

Further, in this embodiment, the sliding door 3
Is provided with a closing mechanism W for surely moving the slide door 3 toward the inside of the vehicle body (toward the rear compartment 2) at the final stage of sliding in the closing direction. As shown in FIG. 7, the shut-off mechanism W
A drive motor 54 disposed between the outer panel 7a and the inner panel 7b behind the opening 1a of the vehicle body 1 facing the rear end edge 3c of the door 3 when the door 3 is closed, and integrated with the drive motor 54. And a speed reducer 55 which is rotatably supported about a support shaft 56 and is provided with link members 57a and 57b.
5, a hook lever 58 connected to the rotating shaft 55a, an engaging pin 60 fixed to the rear end 3c of the sliding door 3 via a support bracket 59, and the engaging pin 60 when the sliding door 3 moves. A limit switch 61 is provided as a door position sensor that controls the state of current supply to the drive motor 54 by contacting the drive motor 60. When the limit switch 61 contacts the engagement pin 60, the drive motor 54 is energized. The rear end of the rotating shaft 54a of the drive motor 54 is biased in a predetermined direction to hold the hook lever 58 in a state shown by a solid line when the drive motor 54 is not energized. The coil spring 62 is wound.

In addition, control switches 63a, 63b
Is provided. As shown in FIG. 8, each of the control switches 63a and 63b is a hook lever 65 which constitutes a lock mechanism Z for locking the slide door 3 in a closed state.
When the control switches 63a and 63b are both OFF, the drive motor 54 can be energized, and conversely, the control switches 63a and 63b When both are in the ON state, the energization of the drive motor 54 is cut off.

Further, as shown in FIG. 1, a pair of foreign matter sensors 67, 67 for controlling the operation of the drive motor 54 in the shutoff mechanism W are provided at the opening edge 1a of the vehicle body 1. When the 67 detects that there is a foreign substance in the opening 1a, the power supply to the drive motor 54 is cut off. Therefore, when there is a person or luggage or the like in the opening 1a, the sliding door 3 cannot be closed. Therefore, it is possible to reliably prevent a person or the like from being caught in the sliding door 3, and Operational safety is improved.

Here, the lock mechanism Z will be briefly described with reference to FIGS. 8 (a) and 8 (b). The lock mechanism Z includes the hooks disposed on the rear end side of the slide door 3. It has a lever 65 and a claw lever 66. The hook lever 65 is rotatably supported by a support shaft 68 and constantly urged in the direction of arrow A by an urging member (not shown). The groove 65a can face the striker 16 fixed at a predetermined position on the opening edge 1a of the vehicle body 1.

On the other hand, the claw lever 66 is rotatably supported by a support shaft 69, and is always urged in the direction of arrow B by an urging member (not shown). Can come into contact with

Then, as shown in FIG.
When the door 3 is moved inward of the vehicle body when the door is closed, the engagement groove 65a of the hook lever 65 comes into contact with the striker 16. When the hook lever 65 further moves toward the vehicle body from this state, the hook lever 65 rotates in the direction of the arrow A, and the claw lever 66 rotates in the direction of the arrow B as shown by a chain line in FIG. , The first and second control switches 63a,
Each of the switches 63b is turned off, so that the drive motor 54 can be energized (that is, the slide door 3 can be opened and closed).

Thereafter, as shown in FIG.
The engaging groove 65a of the hook is securely engaged with the striker 16, and the tip 66a of the claw lever 66 is engaged with the engaging portion 65b formed at a predetermined position on the outer peripheral portion of the hook lever 65, so that the hook The rotation of the lever 65 is restricted. Therefore, the striker 16 is held in the locked state, and the slide door 3
Is securely locked in the closed state. And
In this locked state, the two control switches 63a, 63
b are in the ON state, and the power supply to the drive motor 54 is cut off.

Thus, in this embodiment, the limit switch 6
1. Based on the behavior of the control switches 63a, 63b, the foreign matter sensors 67, 67 and the stop sensor 51, the operation of the drive motor 54 is controlled by a control unit described later. Hereinafter, the actual control of the drive motor 54 by the control unit will be described with reference to the flowchart of FIG.

After start of control, first, in step S _1, stopping the sensor 51
It is determined whether or not the vehicle is currently in a stopped state, that is, whether or not the slide door 3 can be opened and closed, based on the output of (1). In this embodiment, when the parking brake is applied, the transmission lever is in the neutral position, and the vehicle speed is "0", it is determined that the door is opened and closed only when three conditions are satisfied. In other cases, the control of the drive motor 54 is not performed.

Next, in step S _2, the electric circuit shown in FIG. 9
Each of the open / close switches 40a, 40b, 40c, 41a, 41b, 41 constituting 32
one of c is determined whether the ON state, when any one is determined to be ON state, further in step S _3, it determines whether the limit switch 61 is ON . And the limit switch
If it is determined that 61 is in the ON state, in step S4, the foreign matter sensors 67 and 67 are in the OFF state, that is, the sensors 67 and 6
It is determined whether there is a foreign object (for example, the limb of the occupant) between the seven positions.
It is determined whether or not each of the control switches 63a and 63b is in the OFF state. Then, each of the control switches 63a and 63b is set to O
If FF state, wherein the first energizing relative to the drive motor 54 (step S _6).

As a result, as shown in FIG. 7, the drive motor 54 constituting the shutoff mechanism W operates to rotate the hook lever 58, and the hook pin 58 presses the engaging pin 60 toward the vehicle body. The movement of the slide door 3 inward of the vehicle body is assisted.

Thereafter, in step S _7, the respective control switches
It is determined whether both of the control switches 63a and 63b are in the ON state, and if it is detected that these control switches 63a and 63b are both in the ON state, that is, if the slide door 3 is securely locked in the closed state, step in S _8, to cut off the power supply to the drive motor 54.

As a result, as shown in FIG. 7, the rotating shaft 54a of the drive motor 54 is urged by the coil spring 62 to rotate in a predetermined direction, and the hook lever 58 is returned to the original state.

Next, the operation of the slide door structure of this embodiment will be described. As shown by a solid line in FIG. 3, when the slide door 3 is opened while the vehicle is stopped and the slide door 3 is opened, each closing switch 40a,
When any one of 40b and 40c is turned on, the helical shaft 22 rotates via the drive motor 24, and the actuator 25 operates. Then, the female screw portion 30b of the clutch member 30 provided below the slide member 26 is
2 and the slide member 26 moves along the spiral shaft 22. Therefore, the slide door 3 connected to the slide member 26 via the link member 27 is
It slides toward the front side of the vehicle body along each of the guide rails 4, 8, 13 disposed on the vehicle body 1, and is closed as shown by a chain line in FIG.

On the other hand, when any one of the opening switches 41a, 41b, 41c is turned on, the slide member 26 moves in the opposite direction to the above case, and the slide door 3 is indicated by a solid line in FIG. The door is opened as shown in FIG.

In this embodiment, the slide door 3 and the slide member 26 are connected by a link member 27, and a shutoff mechanism W is provided to assist the slide door 3 in moving in the vehicle body. Therefore, especially when the sliding door 3 is slid in the closing direction and is moved inward along the guide rails 4, 8, and 13 in the final stage, the door 3 is easily and lightly moved inward. In the closed state.

Further, in this embodiment, since the entire opening / closing drive device X including the spiral shaft 22 is housed between the step portion 20 and the side sill 19, this is an obstacle on the road surface side during traveling of the vehicle. This prevents the opening / closing drive device X from operating or contacting with muddy water from the road surface, thereby improving the operational reliability and durability of the opening / closing drive device X.

In this embodiment, a part of the opening / closing drive device X is
Although it is constituted by the helical shaft 22, the camshaft 23 and the like, the present invention is not limited to this. For example, it can be constituted by a cable-type transmission means as in the prior art. However, when the helical shaft 22 and the like are used, the helical shaft 22 and the like can be more compactly arranged along the sliding direction of the slide door 3 than when a cable is used. From the viewpoint of the characteristics and the compactness, it can be said that the spiral shaft type as in this embodiment is more preferable than the cable type.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of a vehicle having a sliding door structure according to an embodiment of the present invention, FIG. 2 is an enlarged sectional view taken along the line II-II of FIG. 1, and FIG. FIG. 4 is an enlarged plan view of the slide member shown in FIG. 3, FIG. 5 is a VV cross-sectional view of FIG. 4, FIG. 6 is a VI-VI cross-sectional view of FIG.
FIG. 7 is a plan view of the shut-off mechanism, FIGS. 8A and 8B are structural explanatory views of a lock mechanism attached to the shut-off mechanism, and FIGS.
FIG. 10 is an electric circuit diagram of the opening / closing drive device, and FIG. 10 is a control flowchart of the shutoff mechanism. 1 ... body 2 ... rear compartment 3 ... slide door 4, 8, 13 ... guide rail 18 ... compartment floor 19 ... side sill 20 ... step section 22 ... spiral shaft 23 ... camshaft 24 …… Drive motor 25 …… Actuator 26 …… Slide member 27 …… Link member

Continuing on the front page (72) Inventor Chinatsu Hirayama 3-1 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Mazda Corporation (72) Inventor Koji Takeda 3-1 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Mazda Corporation (56) References JP-A-1-317828 (JP, A) JP-A-56-3019 (JP, U) JP-A-60-154577 (JP, U) JP-A-59-58184 (JP, U) 58) Field surveyed (Int.Cl. ⁶ , DB name) B60J 5/06

Claims (1)

(57) [Claims] An opening defined by a step portion provided at an intermediate position in a vertical direction between a side sill extending in the front-rear direction of the vehicle body and a vehicle cabin floor and having a lower end portion opened at a side portion of the vehicle body. A sliding door supported by a guide rail mounted in the front-rear direction of the vehicle body near the opening and movable in the front-rear direction of the vehicle along the guide rail is arranged, and the opening is opened and closed by the sliding door. A helical shaft between the side sill and the step portion, the helical shaft being disposed in the vehicle longitudinal direction and having both axial ends supported rotatably. And a drive motor for driving the helical shaft to rotate, and the slide door is moved in the axial direction with the rotation of the helical shaft. That the slide member is connected, the sliding door structure of a vehicle, characterized in that it is configured to open and close the slide door by the movement of the slide member caused by the rotation of the spiral shaft.