JPS6345969B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a closing force reducing device for a sliding door.

Conventionally, a sliding door rail is provided on the outer panel of the vehicle body in the front-rear direction, and a roller bracket with a roller rotatably pivotally connected to the rear end of the sliding door via an arm is pivotally mounted, and the roller is mounted inside the sliding door rail. As shown in FIGS. 1 and 2, the base end of the arm 3 is attached to the rear end of the sliding door 1 via a spring bracket 2 fixed to the sliding door 1. is the spindle 4
The tip of the arm 3 is rotatably connected to the roller bracket 7 via a pin 8. In the vicinity of the spindle 4 of the arm 3, when the sliding door is in a closed state, a locking pin 5 is placed at a position that is on the inside of the vehicle interior side of the spindle 4 and offset from the spindle 4 toward the pin 8. One end of the spring 6 is fixed to the spring bracket 2, and the other end of the spring 6 is fixed to the spring bracket 2.

When the sliding door 1 is opened, the spring force of the spring 6 holds the arm 3 substantially perpendicular to the longitudinal direction of the vehicle body, and maintains a constant distance between the vehicle body outer panel and the sliding door 1. The sliding door 1 is movable in the longitudinal direction of the vehicle body along a sliding door rail (not shown), and when the sliding door 1 is closed, the arm 3 is held parallel to the longitudinal direction of the vehicle body. The outer panel of the vehicle body and the outer panel of the vehicle were made to be on the same plane.

Therefore, as mentioned above, the sliding door 1
When the sliding door 1 is opened, the arm 3 is biased by the spring 6 so as to be held substantially perpendicular to the longitudinal direction of the vehicle body, and when the sliding door 1 transitions from the closed state to the open state, that is, when the door starts opening. In order for the spring 6 to bias the arm 3 in the direction of pushing out the sliding door 1 when the door handle is operated to unlock the door, the ideal moment M for the sliding door 1 is As shown in the graph of the figure, when the sliding door 1 is closed
It is large near P ₁ and near P ₃ when fully open, and in the middle part P ₂
If it is close to zero, the sliding door 1 can be operated as described above, and the closing force when opening and closing the sliding door 1 can be reduced.

{In addition, P ₁ is when the sliding door 1 is in the closed state, and P ₃ is when the sliding door 1 is in the open state and the arm 3 is held approximately at right angles to the longitudinal direction of the vehicle body (when the arm 3 is open) (at the end of rotation toward the door). } However, in this conventional structure, since one end of the spring 6 is directly fixed to the arm 3 at one point, the closed state P ₁ as shown in FIG.
As the arm 3 rotates about the pin 8 from 3 to the position P ₃ where the arm 3 is held substantially perpendicular to the longitudinal direction of the vehicle body in the door open state (hereinafter referred to as the door open state), the spring The position of the locking pin 5 to which one end of 6 is fixed rotates around the support shaft 4,
The span H between the support shaft 4 and the center line S of the spring 6
changes as H ₁ , H ₂ , and H ₃ , and as shown in FIG. 4, the middle part P ₂ of the rotation is large, and it is small in the closed door state P ₁ and the open door state P ₃ . Along with this, the spring 6 is compressed, and the spring force F is weakened to F ₁ , F ₂ , and F ₃ as shown in FIG.

Therefore, as shown in FIG. 6, the locus V of the locking pin 5 on which the spring 6 acts forms an arc around the support shaft 4, and the distance W between the support shaft 4 and the locking pin 5 does not change. Since the spring force F of the spring 6 acts in the direction of the center line S of the spring 6, the point where the spring force F acts on the support shaft 4 is
As mentioned above, the span H with the locking pin 5 is H ₁ ,
H ₂ and H ₃ , and the spring force F changes as F ₁ , F ₂ , and F ₃ as described above, resulting in the closed door state P ₁ , the middle part of rotation P ₂ , and the open door state P ₃ The moment acting on arm 3 at (spring force F of spring 6
The span H) is F ₁ ×H ₁ , F ₂ ×H ₂ , F ₃ ×H ₃ , and as shown in Fig. 7, the span is P 1 in the closed state and P ₁ in the open state.
This is a curve in which the intermediate portion _P2 of rotation is larger than _P3 .

Furthermore, even if the position of the locking pin 5 to which one end of the spring 6 is fixed is changed as shown in FIGS. The moment M increases during the closing of the sliding door 1, and therefore, an unnecessary force for closing the sliding door 1 is required.

Therefore, the present invention has been made in view of the above-mentioned conventional problems, and the present invention reduces the moment applied to the link mechanism such as an arm in order to ensure the operation of the link mechanism when opening the sliding door. The purpose is to reduce the closing force when closing a sliding door by making it work only when necessary.

Therefore, in the present invention, the base end of the lever is pivoted between the slide door side pivot of the arm and the roller bracket side pivot in the vicinity of the straight line connecting the arm's slide door side pivot and the roller bracket side pivot. A spring is stretched between the tip of the lever and the sliding door, and a lever stopper is provided on the proximal end side of the arm from the pivot point of the lever proximal end of the arm, and on the outside of the vehicle body from the lever, so that the arm is connected to the vehicle body. The lever contacts the lever stopper from an intermediate position between a position along the longitudinal direction of the vehicle body and a position where the arm is approximately perpendicular to the longitudinal direction of the vehicle body to a position along the longitudinal direction of the vehicle body, and from the intermediate position, the lever contacts the lever stopper. To provide a closing force reducing device in which the lever does not come into contact with the lever stopper until the lever is at a position substantially perpendicular to the direction, and the distance between the sliding door side pivot of the arm and the spring centerline is minimized at the intermediate position. It was designed to achieve the intended purpose.

The present invention will be described below with reference to illustrative embodiments.

Referring to FIG. 10, a denotes a vehicle body, and a slide door rail 12 extends from an outer panel 11 of the vehicle body a. b is a sliding door that closes a door opening 13 formed in the vehicle body a, and an arm 15 is attached to the rear end of the sliding door b via a bracket 14 attached to the sliding door b.
The proximal end of is rotatably attached to a pivot shaft 16. A roller bracket 18, on which a roller 17 is rotatably mounted, is pivotally attached to a pin 26 fixed to the tip of the arm 15. The roller 17 is
The roller bracket 18 is rotatably mounted within the sliding door rail 12 so that the roller bracket 18 slides within the sliding door rail 12.
Further, a locking lever 20 is rotatably attached to the tip of the roller bracket 18 by a pivot shaft 21 and has a hook 20a at the tip that engages with a stopper 19 provided at the front end of the slide door rail 12. A spring (not shown) interposed in the pivot 21 always biases the hook 20a in the direction of engaging the stopper 19.

A cam portion 26 a having a semicircular cross section is formed on the pin 26 fixed to the tip of the arm 15 , and the cam portion 26 a is configured to abut against the side surface of the locking lever 20 . done,
When the sliding door b is closed and the arm 15 faces in the longitudinal direction of the vehicle body, the hook 20a of the locking lever 20 engages with the stopper 19, and the sliding door b
When the arm 15 is opened and rotated in a direction substantially perpendicular to the longitudinal direction of the vehicle body, the locking lever 20 is pushed by the cam portion 26a due to the rotation of the pin 26, and the hook 20a is removed from the stopper 19. It is done like this.

As shown in FIG. 11, near the base end of the arm 15, an arm stopper 15a is formed which abuts the inner surface 14a of the bracket 14, and the center point Q ₁ of the pivot 16 of the arm 15 on the bracket 14 side is formed. The base of a lever 22 is rotatably pivoted by a pin 23 near the center point _Q1 of the pivot shaft 16, which is close to the straight line L connecting the roller bracket 18 and the center point _Q2 of the pivot joint on the roller bracket 18 side. . One end of a spring 24 is engaged with the tip of the lever 22, and the other end of the spring 24 is engaged with the bracket 14. 25 is a weather strip attached to the periphery of the door opening 13. (See Fig. 10) Therefore, as shown in Figs. 11 and 12, when the sliding door b is closed, the pivot 16 acts as a lever stopper, and the lever 22 comes into contact with the pivot 16 and is pressed (for details, refer to Fig. 10). (described later) Center point of the pivot shaft 16 in the closed state _P1 of the sliding door b
The distance h ₁ between the position A of Q ₁ and the center line S of the spring 24 causes the lever 22 to no longer be pushed by the pivot 16 . (Details will be described later) The center point of the pivot 16 at P ₂ during the rotation of the arm 15 (middle of rotation)
The lever 22 is moved in a direction that is larger than the distance _h2 between _Q1 , position B, and the center line S of the spring 24, and intersects the straight line connecting the pivot shaft 16 and the center point _Q2 of the pivot portion on the roller bracket 18 side. The distance h 3 between the center point Q ₁ of the pivot shaft 16 in the open state P ₃ of the extending sliding door b ₍ details will be described later) and the center line _S of the spring 24 is also Arrival 1
6 and the center line _S of the spring ₂₄ . In addition, along with this, the spring 24 is contracted from the closed door state P ₁ to the opening state P ₂ , and from the door opening state P ₂ to the opening state P ₃ , and the spring 24 is compressed.
As shown in the figure, the spring force f becomes weaker as f ₁ , f ₂ , and f ₃ .

When the center point Q ₁ of the pivot shaft 16 is between position A (closed state P ₁ ) and position B (during rotation P ₂ ), the point at which the spring force f of the spring 24 acts is the same as that of the spring 24 . It becomes the connection point Y of the lever 22,
Furthermore, when the center point Q ₁ of the pivot shaft 16 is between position B and position C (door open state P ₃ ), the lever 22 separates from the pivot shaft 16, so the point at which the spring force of the spring 24 acts is the lever 22. and the connection point of arm 15
Y' (that is, the pin 23 part).

Furthermore, when the change in the distance h between the center point _Q1 of the pivot shaft 16 and the center line S of the spring 24 is shown in a simplified diagram with the center point _Q1 of the pivot shaft as a fixed point in correspondence with FIG. As shown in the figure, when the sliding door b is opened from the closed state _P1 , the lever 22 is in contact with the pivot 16, and the lever 22 is oriented toward the center of the vehicle body at an angle with respect to the longitudinal direction of the vehicle body. When the arm 15 rotates from the state where the lever 22 and the center line S of the spring 24 are at an angle and reaches _P2 in the middle of rotation,
The abutment between the pivot shaft 16 and the lever 22 disappears, and the distance between the lever 22 and the center line S of the spring 24 disappears, resulting in a straight line state, and the distance h changes from h ₁ to h ₂
(see FIG. 12), the spring force f of the spring 24 also comes to act from the connection point Y to the pin 23, that is, to the connection point Y'. Further, in a state in which the arm 15 further rotates from _P2 during rotation and becomes approximately perpendicular to the longitudinal direction of the vehicle body, that is, in the door open state _P3 ,
The straight line connecting the center point Q ₁ of the pivot 16 and the center point Q ₂ of the pivot joint on the roller bracket 18 side intersects the center line S of the spring 24 at an angle, and the distance h _is h ₃ (see Figure 12), and the spring 24 at this time
The spring force f acts on the pin 23, that is, on the connection point Y'.

As a result, as shown in Fig. 15, the moment M becomes a curve in which _P2 becomes smaller during the rotation (in the middle of the rotation) than the closed door states _P1 and _P3 , so that the closing force of the sliding door b is reduced. Can be done.

The solid line in Fig. 11 indicates the closed state _P1 of the sliding door b, and the chain line at the bottom right of the figure indicates the state in which the sliding door b is opened and the arm 15 is approximately perpendicular to the longitudinal direction of the vehicle body. In other words, when the arm 15 has finished rotating in the door-opening direction, the above-mentioned open state _P3 (sliding door b is not fully opened, but sliding door b is fully opened) (Also, the arm 15 is in a state substantially perpendicular to the longitudinal direction of the vehicle body.) In addition, the chain line at the lower left of the figure indicates the state when the arm 15 is rotated to an intermediate position between the above two states, that is, the state in the middle of rotation.
Showing _P2 .

Further, in the embodiment described above, the pivot 16 is used as a lever stopper, but the arm 15 is not limited to this.
A flange that engages with the lever 22 may be provided protrudingly on the lever 22, and this may be used as a lever stopper.

As described above, according to the present invention, the lever is located between the sliding door side pivot of the arm and the roller bracket side pivot in the vicinity of the straight line connecting the sliding door side pivot of the arm and the roller bracket side pivot. A spring is stretched between the tip of the lever and the sliding door, and a lever stopper is provided on the base end side of the arm from the lever base pivot portion of the arm and on the outside of the vehicle body from the lever. From an intermediate position between a position where the arm is along the longitudinal direction of the vehicle body and a position where the arm is substantially perpendicular to the longitudinal direction of the vehicle body to a position along the longitudinal direction of the vehicle body, the lever is in contact with the lever stopper, and the lever is in contact with the lever stopper at the intermediate position. The lever does not come into contact with the lever stopper from the position substantially perpendicular to the longitudinal direction of the vehicle body, and the distance between the sliding door side pivot of the arm and the spring center line is minimized at the intermediate position. We were able to reduce the closing force of the sliding door. Therefore, the sliding door can be opened and closed easily and easily.

[Brief explanation of drawings]

Figure 1 is a plan sectional view of the main parts of the sliding door showing the conventional arm and spring installation state, Figure 2 is a perspective view of a part of the same as seen from the back, and Figure 3 shows the ideal moment characteristics. Graph diagrams, Figures 4 to 9 are conventional graph diagrams explaining moments, Figure 1.
Fig. 0 is a plan sectional view of the main part showing the relationship between the sliding door and the vehicle body, showing the mounting state of the arm and spring according to the present invention, Fig. 11 is an enlarged plan sectional view of the main part showing the operating state of the same, and Fig. 12 15 through 15 are explanatory graphs of moments according to the present invention. 12 is a sliding door rail, b is a sliding door, 15 is an arm, 16 is a pivot, 18 is a roller bracket, 22 is a lever, and 24 is a spring.

Claims (1)

[Claims] 1 A sliding door rail is installed on the outer panel of the vehicle body in the longitudinal direction, the base end of an arm is pivotally attached to the rear end of the sliding door, and a roller bracket with a roller rotatably pivotally attached to the tip of the arm is pivotally attached to the rear end of the sliding door. The roller is rotatably mounted within the sliding door rail, and when the sliding door is opened, the arm becomes approximately perpendicular to the longitudinal direction of the vehicle body, reducing the distance between the outer panel of the vehicle body and the sliding door. the sliding door is movable along the sliding door rail, and when the sliding door is pulled in the closing direction, the roller bracket comes into contact with the front end of the sliding door rail, and the arm rotates and faces in the front-rear direction.
In a sliding door device in which a sliding door is configured to close, the sliding door-side pivot of the arm and the roller bracket-side pivot are connected in the vicinity of a straight line connecting the slide-door-side pivot of the arm and the roller bracket-side pivot. The base end of the lever is pivoted between the
A spring is stretched between the tip of the lever and the sliding door, and a lever stopper is provided on the proximal end side of the arm from the pivot point of the lever base end of the arm and on the outside of the vehicle body, so that the arm is connected to the front and rear of the vehicle body. The lever contacts the lever stopper from an intermediate position between a position along the direction and a position where the arm is substantially perpendicular to the longitudinal direction of the vehicle body to a position along the longitudinal direction of the vehicle body, and from the intermediate position to a position along the longitudinal direction of the vehicle body. The sliding door is characterized in that the lever does not come into contact with the lever stopper until the lever is at a substantially right angle position, and the distance between the sliding door side pivot of the arm and the spring centerline is minimized at the intermediate position. Closing force reduction device.