JPH0647331B2 - Door opening / closing link mechanism - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a door opening / closing link mechanism for opening / closing an intake door in an air conditioner for a vehicle, for example.

[Background of technology] The intake unit of the air conditioner for automobiles is
As disclosed in Japanese Utility Model Laid-Open No. 516045/1976, it has an outside air intake for introducing outside air into the vehicle compartment and an inside air circulation opening for introducing air in the vehicle interior, and these are alternately opened and closed. For this reason, an intake door is rotatably mounted in the intake unit. A conventional door opening / closing link mechanism for opening / closing the intake door is shown in FIG.

The intake door 1 is fixed to a rotary shaft 3 which is rotatably supported by the intake unit 2. The intake door 1 closes the outside air intake 4 indicated by the symbol A in FIG. 1 and the inside air circulation port 5 indicated by the symbol B. Close position and open and close. A rotary lever 6 is fixed to the rotary shaft 3. In order to open and close the intake door 1, a drive lever 9 which is rotatable by a pin 8 is attached to the support fitting 7, and an engagement pin 10 fixed to the drive lever 9 is attached to the rotary lever 6. Is engaged with the cam surface 11 formed on the. Support bracket 7
Is attached to the intake unit 2 with two screws 12 and 13, and a cable 15 attached to the support fitting 7 by a clip 14 is connected to the drive lever 9.

The cam surface 11 has a cam surface 11a that engages with the engagement pin 10 when the intake door 1 is in the A position, and a cam surface 11b that engages with the engagement pin 10 when the intake door 1 is in the B position. And a cam surface 11c that engages in the middle of. When the engagement pin 10 engages with the cam surfaces 11a and 11b, the crossing angle between the cam surface and the drive lever 9 is close to a right angle, and the link mechanism is operated by the wind pressure applied to the intake door. The intake door does not open and close.

Then, in order to assemble the door opening / closing link mechanism as shown in FIG. 1, in order to prevent the intake door from being set at a predetermined opening / closing position due to a manufacturing error of each component, the cam surface 11 is engaged. When the support fitting 7 is attached to the intake unit 2 by the screws 12 and 13 with the dowel pin 10 engaged, the support fitting 7 itself is adjusted and moved. For this reason, the hole formed in the support metal fitting 7 into which one of the screws 12 is fitted is an elongated hole 16. After temporarily fixing the support metal fitting 7 using both screws 12 and 13, the intake door 1 is attached. The predetermined position of the support fitting 7 is determined while switching and moving to the A position and the B position.

[Problems of Prior Art] For this reason, the position of the support metal fitting 7 is set so that the intake door 1 is at the position A and the position B at which the outside air intake port 4 and the inside air circulation port 5 are surely closed. It took a long time to do the work, and the cost was increased.

Further, since such a support fitting can only be adjusted in the M direction in FIG. 1, the opening / closing angle θ ₁ of the intake door 1 can be adjusted by adjusting the distance L between the rotating shaft 3 and the support pin 8. However, it was almost impossible to adjust the angle with respect to the intake unit 2 within the operating range of the intake door 1. For example, in FIG. 1, when the support fitting 7 is moved upward in the M direction, the distance L becomes short, and therefore the opening / closing angle θ ₁ of the intake door 1 becomes large. In this way, the opening / closing angle θ ₁ can be adjusted so that the angle θ ₁ can be brought close to the angle θ ₂ formed by the surface of the outside air intake 4 and the surface of the inside air circulation port 5 of the intake unit 2. However,
Since the support bracket 7, can not be the direction of adjustment along the circumferential direction N around the pivot shaft 3, as shown in the schematic diagram of FIG. 2, to close the opening angle theta ₁ to the angle theta ₂ However, the angle α of the intake door 1 with respect to the intake unit 2 cannot be adjusted.

Therefore, for example, even if the support fitting 7 is adjusted in the M direction to bring the opening / closing angle θ ₁ of the intake door 1 closer to the angle θ _{2 of the} intake unit, the intake door 1 may cause the internal air circulation port due to manufacturing errors or the like. 5 or outside air intake 4
There is a possibility that a situation may occur in which one of the two cannot be closed without a gap.

[Object of the Invention] The present invention has been made in view of the above circumstances, and relates to a door opening / closing link mechanism for opening and closing a door, in which an opening provided in a unit is selectively opened without a gap. An object of the present invention is to provide a door opening / closing link mechanism that can be closed and that can be easily adjusted when assembling the link mechanism.

[Structure of the Invention] In order to achieve such an object, the present invention has a door, which opens and closes an opening provided in a unit, centered around a rotation shaft rotatably supported by the unit by the rotation of a drive lever. In a door opening / closing link mechanism that pivots via a pivot lever, a support fitting that axially supports the drive lever is rotatable with respect to the unit about the pivot axis, and the pivot is attached to the support fitting. The support fitting is fixed to the unit 1 by providing a long hole opened along an arc having a predetermined radius as a center and screwing the screw into the unit by passing a screw through the long hole.

EXAMPLES Examples of the present invention will be described below with reference to the drawings.

FIG. 3 is a front view showing an intake door opening / closing link mechanism according to an embodiment of the present invention, and members common to those shown in FIG. 1 are designated by the same reference numerals.

Intake door 1 in this intake unit 20
Is interlocked with a rotary lever 6 via a rotary shaft 3 rotatably supported by the intake unit 20, and rotates with the rotation of the rotary lever 6. .
A cam surface 11 is formed on the rotating lever 6,
An engagement pin 10 of a drive lever 9 is engaged with the cam surface 11. The drive lever 9 is supported by the support pin 8 on the support fitting 70.
The drive pin 9 is pivotally supported with respect to the drive lever 9 so that the engaging pin 10 causes the cam surface 1 of the rotary lever 6 to rotate.
1 is moved to rotate the rotation lever 6. A cable 15 is fixed to the support fitting 70 by a clip 14, one end of a wire 17 in the cable 15 is connected to one end of the drive lever 9, and the wire 15 is driven by a physical movement of the wire 17. Lever 9
Is designed to rotate. The other end of the wire 17 is connected to an intake lever (not shown) in a control panel provided in front of the driver's seat, and the wire 1 is operated by a driver or the like operating the intake lever.
7 is driven to rotate the drive lever 9. A vacuum actuator may also be used as the drive source.

The cam surface 11a, 11b, 11c is formed on the cam surface 11 formed on the rotary lever as in the conventional example shown in FIG. 1, and the intake surface is formed when the engagement pin 10 is engaged with the cam surface 11a. When the door is in the A position and the engagement pin 10 is engaged with the cam surface 11b, the intake door 1 is in the B position, and when the engagement pin 10 is engaged with the cam surface 11c, the intake door 1 is in the A or B position. It is designed to come to an intermediate position. The engagement pin 10 is connected to the cam surfaces 11a, 1
When engaged with 1b, the crossing angle between the cam surface and the drive lever is close to a right angle so that the link mechanism is actuated by the wind pressure applied to the intake door to prevent the intake door from opening and closing. .

The support fitting 70 is rotatable with respect to the intake unit 20 about the rotation shaft 3. Further, the support fitting 70 is provided with a long hole 16a having a predetermined radius R centering on the rotating shaft 3 and extending in an arc direction. A screw 12 is passed through the long hole 16a, and the screw 12 is screwed to the intake unit, so that the support fitting 7
0 is fixed to the intake unit 20.

In such an intake door opening / closing link mechanism, when a driver or the like rotates the drive lever 9 by operating the intake lever, the engagement pin 10 of the drive lever 9 is rotated.
Moves the cam surfaces 11a, 11b, 11c of the cam surface 11, and accordingly the turning lever 6 on which the cam surface is formed.
To rotate the intake door 1 to a predetermined position.

Further, when assembling such an intake door opening / closing link mechanism, it is carried out as follows.

First, the intake door 1 is axially supported by the rotating shaft 3 in the intake unit 20. Next, a support fitting 70 and a turning lever 6 are rotatably attached to the turning shaft 3, and a cam surface 11 of the turning lever 6 and an engagement pin of a drive lever 9 pivotally supported by the support fitting 70. And 10 are engaged. Next, the screw 12 is passed through the long hole 16a provided in the support fitting 70, and the screw 12 is temporarily fixed to the intake unit 20. Further, for example, with the engagement pin 10 of the drive lever 9 engaged with the cam surface 11a, the elongated hole 1 of the support fitting 70 is
The push-pull gauge 30 (tensile load measuring device) is attached to the attachment portion 31 provided in the vicinity of 6a, and the push-pull gauge is pulled. Measured by the push-pull gauge, when the load measured by the push-pull gauge reaches a predetermined value, the screw 12 is tightened to fix the support fitting 70 to the intake unit 20.

In this way, if the link mechanism for opening and closing the intake door is assembled, the intake door 1 is replaced by the intake unit 2.
No special alignment to 0 is required. Further, although the intake door 1 can be easily aligned with the support fitting 70, the intake door 1 can selectively seal the outside air intake port 4 and the inside air circulation port 5.
Although the opening angle theta ₁ of the intake door 1 is determined by the distance L between the rotating shaft 3 and the support pins 8, in the present invention, it is possible the distance is set within manufacturing error range of the support bracket , The opening / closing angle θ ₁ of the intake unit 20
It can be set to a value close to the angle θ ₂ between the outside air intake port and the inside air circulation port. Therefore, it is not necessary to adjust the opening / closing angle θ _{1 in} the previous period. For example, press molding can be performed with sufficient accuracy. Also, intake door 1
The position of the support fitting 70 with respect to the intake unit 20 can be adjusted by moving the support fitting 70 in the N direction along the elongated hole 16a. Further, as described above, the push-pull gauge 30 is used to set the N of the support fitting 70.
When the direction is adjusted, the pressure contact load at which the intake door 1 closes the outside air intake port 4 or the inside air circulation port 5 by pressing can be set.

The present invention is not limited to the above-described embodiment, but can be applied as a door opening / closing link mechanism in a unit other than the intake door opening / closing link mechanism of the vehicle air conditioner.

EFFECTS OF THE INVENTION As described above, according to the present invention, the support fitting for axially supporting the drive lever is made rotatable with respect to the unit about the rotation shaft, and the support fitting is provided with a predetermined centering about the rotation shaft. Since a long hole opened along an arc of a radius is provided and a screw is passed through the long hole and screwed to the unit, the support fitting is fixed to the unit to form a door opening / closing link mechanism. It is possible to selectively close the opening provided in the space without a gap, and it is extremely easy to adjust the alignment etc. when assembling the link mechanism, which saves labor in manufacturing the unit and reduces the cost. It also has an excellent effect that it also contributes.

[Brief description of drawings]

FIG. 1 is a front view showing a conventional intake door opening / closing link mechanism, FIG. 2 is a schematic view showing the operation of the link mechanism shown in FIG. 1, and FIG. 3 is an intake door opening / closing according to an embodiment of the present invention. It is a front view showing a link mechanism for use. 1 ... Intake door, 2, 20 ... Intake unit, 3 ... Rotating shaft, 4 ... Outside air intake port, 5 ... Inside air circulation port, 6 ... Rotating lever, 7, 70 ... Support metal fittings, 9 ... Drive lever, 12 ... Screw, 16, 16 ... Oblong hole.

Claims (1)

[Claims] 1. A door opening and closing device for opening and closing an opening provided in a unit, wherein the drive lever is rotated to rotate the door through a rotation lever about a rotation shaft rotatably supported by the unit. In the link mechanism for a vehicle, a support fitting for axially supporting the drive lever is rotatable about the rotation axis with respect to the unit, and is provided on the support fitting along an arc of a predetermined radius centered on the rotation axis. A door opening / closing link mechanism in which the supporting metal fitting is fixed to the unit by screwing the elongated hole into the unit and screwing the screw into the unit.