JPS6378983A - Automatic door opening and closing apparatus for vehicle - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention provides a vehicle that has excellent responsiveness and smooth operation in the reciprocating opening and closing operations of a door, and that can utilize a sufficiently large space on the entrance/exit step. This invention relates to an automatic door opening/closing device.

(Prior Art) Conventionally, automobiles have been configured to open and close the rear entrance on the side of the body by sliding in the longitudinal direction approximately parallel to the side of the body, like the rear side door of a one-box car. For example, the door opening/closing mechanism shown in Fig. 7 (
a) (b) There are some as shown in Figure 8 (a) and (b).

A rear side door 2 of this one-box car 1 is located behind a driver's seat 3, and an entrance/exit 5 can be opened and closed by an opening/closing mechanism 4. This opening/closing mechanism 4 is shown in FIG.
) As shown in (b), a chain 7 installed on the step 6 of the entrance 5 and stretched endlessly in the front and rear direction;
A pair of sprockets that tension and support the chain 7) 8a, 8
b and 1. A gear box section 9 that transmits drive torque from a drive section such as a motor (not shown) to a chain sprocket (8a), a first guide rail (not shown) installed at the step 6, and a first guide rail (not shown) located at the rear of the entrance/exit 5. A second guide rail 10 placed on the side surface of the pod, a third guide rail (not shown) placed on the upper edge of the doorway 5, and a chain 7
Fixing metal All fixed in the upper predetermined position and fixing metal fitting 1
The link member 12 has an inner end 12a rotatably supported by the door 2 and an outer end 12b rotatably supported by the door 2, and a link member 12 that projects from the door 2 and is slidably engaged with each guide rail. It consists of first to third guided arms (only the second guide arm 13 is shown). A curved part curved from the front inside to the rear outside is formed in each front part of the first, second, and third guide rails, and the door 2 fits into the entrance 5 and forms a stepless shape with the body side wall. The door 2 is designed to be able to slide between the closed position and the open position where it overlaps the outer surface of the body side wall in parallel while maintaining a parallel posture. In the process of moving the door from inside to outside or from outside to inside,
By rotating the link member 12 in the inward and outward directions about the inner end portion 12a, the door can be moved in the inward and outward directions.

The chain 7 is reversibly rotationally driven by a drive unit (not shown) that is turned on and off by an operation switch 15 on the driver's seat, and the movement of the chain in the front and rear direction causes the fixing metal fitting 11 to be rotated reversibly.
The door 2 supported by the door 2 is configured to be able to open and close in the front and rear directions.

(Problem to be Solved by the Invention) However, in the conventional door opening/closing mechanism as described above, the chain 7 and the gear box 9 are located on the upper surface of the step 6, and the chain 7 and the gear box 9 are located on the upper surface of the step 6, so that Because it protrudes upward, it is an obstacle to ensuring safety when going up and down and stability as a scaffold. In particular, in order to ensure safety, a cover that completely covers the chain, gearbox, etc. is required, which increases the amount of upward protrusion, worsens the appearance, or increases manufacturing costs. There is a problem with doing so.

Furthermore, recently, equipment such as an air cleaner is sometimes installed on the step, and in this case, it is extremely inconvenient to use conventional products in which the main parts of the opening/closing mechanism are installed on the top surface of the step.

Further, as in the conventional case, when the fixing fitting 11 supported by a chain and the door 2 are rotatably connected by the link member 12, both ends 12a, 12 of the link member 12
Since the door 2 swings back and forth and in and out directions with b as the center of rotation, the responsiveness at the start of opening/closing movement decreases, and at the same time, the link member 12 acts as a resistance to the movement of the door 2, reducing the smoothness of the opening/closing movement. There is a risk of lowering the

(Means for Solving the Problems) The present invention has been made in view of the above, and it is possible to effectively utilize the space on the steps without causing a decrease in responsiveness or a decrease in smoothness in the opening/closing operation of the door. It is intended to make it possible.

In order to achieve this object, the automatic opening/closing device for a vehicle door of the present invention is provided.

In an opening/closing mechanism that opens and closes an entrance formed in a body by moving substantially parallel to a body surface, the opening/closing mechanism is disposed below a step at the bottom of the entrance, and the opening/closing mechanism is arranged at least in the direction of the door. A chain stretched endlessly in the opening/closing direction, a means for driving the chain, a support member fixed to the chain, and supported by the support member so as to be able to reciprocate in and out directions. Fixed to the door? T'! It is characterized by consisting of a moving member.

(Example) Hereinafter, the automatic opening/closing device for a vehicle door of the present invention will be described in detail.

Figures 1 and 2 (a), (b), and (c) are explanatory diagrams of the main parts of an embodiment of the present invention, and Figures 3 (a) and (b) show the installation of the present invention device in a one-box car. 4(a) and 4(b) are explanatory diagrams showing the positional relationship of each member in the closed state and the open state. FIG. 5 is an explanatory diagram of the structure of the door lock device. FIG. 6 is an explanatory view showing how the support member and the door are attached.

This opening/closing device 24 is shown in FIGS. 3(a), (b) and 4(a).
) As shown in (b), a pair of sprockets 28a and 28b are rotatably supported with a front-back positional relationship on the lower surface of the step 6 of the entrance/exit 5, and each sprocket) 28a
, 28b and is stretched endlessly in the front-rear direction, a gear box 29 that transmits drive torque from a drive unit such as a motor (not shown) to the sprocket 2) 28a, and a chain 27 on the chain 27. A support member 30 fixed at a predetermined position (outer running area 27a) and an outer end portion 31
a slide piece (sliding member) 31 which is fixed to the door 2 and whose inner portion 31b is supported by a support member 30 so as to be able to slide freely in the inward and outward directions (direction orthogonal to the running direction of the chain 27); A first guide rail 32 formed in a recess 6a formed on the outer end surface, a second guide rail 33 laid on the side surface of the body behind the doorway 5, and a not-shown guide rail laid above the doorway 5. The third guide rail and the first and second guide rails 3
2.33, the first and second guided arms 34.35 are slidably engaged with the third guide rail, the third guided arm (not shown) is slidably engaged with the third guide rail, and the chain is It has a chain cover 36 that covers the chain and guides the chain and support member 30 to travel.

Each front end of the first, second, and third guide rails is formed with a curved portion that curves from the front inside to the rear outside, so that the door 2 fits into the entrance 5 and connects to the body side wall in a stepless manner. The door 2 is designed to be able to smoothly slide between the closed position and the open position where the door 2 overlaps the outer surface of the body side wall in parallel while maintaining the parallel position.

The chain 27 is reversibly rotationally driven by a drive unit (not shown) that is turned on and off by an operation switch 15 on the driver's seat, and the movement of the chain 270 in the front-rear direction causes the door 2 connected to the chain via the support member 30 to move in the front-rear direction. (
It is configured to be able to open and close in the left and right directions in FIGS. 1 and 2 (a) and (b).

The support member 30 is directly fixed to the chain 27 and attached to the chain cover 36 as shown in FIGS. 2(b) and 6(c).
A base 40 with a U-shaped cross section that moves in the front-back direction inside the chain cover 36, a pair of rollers 41 that are rotatably supported on the lower surface of the base 40 at a predetermined interval, and a chain cover 36 that can slide smoothly inside the chain cover 36. A slide piece 31 is supported in the space between the pair of rollers 41 so as to be slidable in the inner and outer directions. Slide piece 3
1, when the guided arms 34, 35, etc. of the door 2 move inwardly and outwardly along the front curves of the guide rails 32, 33, etc., the door 2 separates from the chain 27,
It is configured to allow access.

A worm gear 45 is disposed within the gear box 29, and includes a worm wheel 45a coaxially integrated with the sprocket 28a, and a worm 45b meshing orthogonally with the worm wheel 45a. The worm 45b is connected to a drive unit such as a motor (not shown) to rotationally drive the sprocket 28a.

A striker 47 is protruded and fixed on the running part 27b on the opposite side to the outer running part 27a of the chain to which the support member 30 is attached, and a first switch 48 (on the front side, (on the left side in the drawing) and a second switch (not shown) (on the rear side, on the right side in the drawing). Both the first and second switches are strikers 4
When 7 passes, it is pressed and switched off.

The first switch 48 located at the front is turned off just before the end of opening the door and cuts off the ground of the motor relay, thereby stopping the motor from driving in the fully open state, and the second switch located at the rear is turned off when the door is closed. It is configured to turn off and stop driving the motor as soon as it enters the locked state. This is to prevent the motor from seizing up due to continuing to drive the motor after the fully open state has reached the closed state.

The changeover switch 15 is connected via a control box 49 to a control target such as a drive unit such as a motor (not shown) or a notification device such as a buzzer.

FIG. 5 shows a door lock device for locking the door 2 in the closed position, which includes an electromagnet 50 connected to the changeover switch 15 via a control box 49, a windmill 51 that engages with a locking fitting (not shown), and an expansion mechanism. The wind turbine 51 is always urged in the direction of engagement shown by the arrow by the opening spring 52.
Lock lever 53 that stops rotation by engaging with
and a rod 54 which is biased in the direction of the arrow by the excitation of the electromagnet 50 to release the locking of rotation by the lock lever 53.

In the configuration described below, when the door 2 is in a closed state, the slide piece 31 supported between the rollers 41 of the support member 30 fits the door 2 into the doorway 5 by retracting the slide piece 31 inwardly. I'm wearing it.

When the changeover switch 15 is turned on to open the door while the door 2 is in the closed state, the drive unit starts driving in the opening direction and is connected to the support member 30 fixed to the outer side of the chain 27. Move the door 2 in the opening direction. At the start of movement in the opening direction, each guided arm 34, 35, etc. of the door is guided rearward and outward along the front curved part of each guide rail 32, 33, etc., but at this time, the sliding By sliding the piece 31 outward (in a direction perpendicular to the chain) between the rollers 41 of the support member 30, the door 2 is allowed to move outward away from the chain 27. When each guided arm 34, 35, etc. passes through a curved portion of each guide rail 32, 33, etc. and enters a straight portion, the slide piece 31 continues to maintain an outwardly protruding state.

Next, when the door 2 is fully open, selector switch 15
When the door is turned toward the closing door, the drive section starts reverse drive, and the support member 30 fixed to the chain starts running in the closing direction (forward). When the door 2 connected to the support member 30 by the slide piece 31 starts moving forward, each guided arm 34.35 etc. moves to each guide rail 32.3.
It enters the curved part from the straight part of 3rd class and tries to move inward. In the process of this inward movement, the slide piece 31 gradually slides inward between the rollers 41 of the support member, thereby allowing the door 2 to fit into the entrance/exit 5.

The movement of the door inward and outward during this opening/closing process is as follows:
Since this is realized by the sliding movement of the slide piece 31, the responsiveness is extremely good, and the smoothness in the process of movement in the front-back direction is not impaired.

Further, since the opening/closing device 24 is installed on the lower surface of the step 6, there is no possibility of causing problems such as narrowing the space below the entrance/exit 5. Therefore, the space above the step 6 can be used effectively, such as by installing an air cleaner.

Note that when the changeover switch 15 is turned on to open the door while the door 2 is in the closed state, the electromagnet 50 is energized and ff! 2
At the same time as the door 2 is unlocked, a warning buzzer sounds for about one second, and then the drive section is activated to open the door 2. When the changeover switch 15 is turned on to the closing side when the door 2 is fully open, an alarm buzzer sounds for about one second, and then the drive section is reversed to close the door.

(Effects of the Invention) As described above, according to the automatic vehicle door opening/closing device of the present invention, the space on the step is effectively utilized without causing a decrease in responsiveness or smoothness in the opening/closing operation of the door. can do.

[Brief explanation of the drawing]

Figures 1 and 2 (a), (b), and (c) are explanatory diagrams of the main parts of an embodiment of the present invention, and Figures 3 (a) and (b) show that the present invention is installed in a one-box car. A front view and a plan view showing the installed state, FIGS. 4(a) and 4(b) are explanatory diagrams showing the positional relationship of each member in the closed state IB and the open state, and FIG.
The figure is an explanatory diagram of the configuration of the door lock system, Figure 6 is an explanatory diagram showing the state of attachment of the support member and the door, and Figures 7 and 8 are the configuration of the door opening/closing mechanism of a conventional one-box car. Front view and plan view. sign

Claims (1)

[Claims] An opening/closing mechanism that opens and closes an entrance/exit formed in a body by moving substantially parallel to a body surface, wherein the opening/closing mechanism is disposed below a step of the entrance/exit, and the opening/closing mechanism is arranged below a step of the entrance/exit. The mechanism includes at least a chain stretched endlessly in the opening/closing direction of the door, a means for driving the chain, a support member fixed to the chain, and a mechanism capable of reciprocating in and out directions by the support member. 1. An automatic opening/closing device for a vehicle door, comprising a sliding member supported by the door and fixed to the door.