JPH0234084Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial Application Field" The present invention relates to an air venting device for a cab-over type truck or any other vehicle.

``Prior Art'' In a vehicle such as a truck with a small cabin volume, the pressure inside the cabin increases when the cabin door is closed, causing a feeling of pressure in the ears or the cabin door not closing smoothly. Therefore, in order to prevent this, Jitsukaiaki
An air venting device for a vehicle as disclosed in Japanese Patent No. 60-68815 has been proposed. This vehicle air vent device connects a partition plate to the passenger compartment door using a wire cable, and when the passenger compartment door is opened, the partition plate slides inside the storage case, and a punch hole formed in the storage case and a partition plate are formed in the partition plate. Match the punch holes to communicate the inside and outside of the vehicle, and when the vehicle interior door is closed, when the wire cable loosens, the spring pushes the partition plate, engages the damper with the rack formed on the partition plate, and seals it inside the damper. The viscous resistance of the grease delays the return sliding of the partition plate, allowing air inside the vehicle to escape to the outside of the vehicle.

However, in the conventional air venting device for a vehicle having the above configuration, when the vehicle interior door is closed, the damper immediately engages with the rack of the partition plate and starts operating as soon as the vehicle interior door begins to close. Since the viscosity of the grease changes depending on the temperature, the delay time for the return sliding of the partition plate relative to the closing operation of the passenger compartment door changes significantly depending on the temperature. In other words, in winter or at low temperatures, the viscosity of the grease increases, which increases the delay time for the partition plate to slide back, and even after the compartment door is closed, cold outside air flows in for a while, causing the interior temperature to drop. It was hot. On the other hand, in summer or high temperatures, the viscosity of the grease decreases and the return sliding of the partition plate becomes faster, causing a disconnection between the interior and exterior of the vehicle before sufficient air can escape to the outside. There were problems with the passenger compartment door not closing smoothly and causing a feeling of pressure.

In addition, there is a problem in that the assembling accuracy of the partition plate and the damper must be ensured in order to cause the racks of the partition plate and the damper to engage or disengage depending on the sliding direction of the partition plate.

"Problems that the invention attempts to solve" This invention was made to solve the above problems, and is not affected by temperature.
To provide an air venting device for a vehicle that can reliably prevent an increase in pressure in a vehicle interior when a vehicle interior door is closed and reduce assembly accuracy.

"Means for solving problems" As specific means for achieving the above purpose,
In a vehicle air vent device that releases air from the vehicle interior to the outside when the vehicle interior door 10 is closed, the device is provided on the side wall 7 of the vehicle interior and closes by contacting the vehicle interior door 10 when the vehicle interior door 10 is about to be fully closed. an operating means 11 having a rotating arm 8 that is rotated in a direction, an operating lever 9 fixed to the rotating arm 8, and a spring 2 for restoring the operating means that biases the rotating arm 8 and the operating lever 9 in the opening direction. , an air hole 5 bored in the floor surface 4 of the vehicle compartment is provided so as to be openable and closable from above,
A shutter 6 has a shutter-closing spring 1 that is always biased in the closing direction, and is connected to the operating lever 9, which rises as the operating lever 9 rotates in the opening direction, and which moves the shutter in the closing direction. A rod 12 that descends as it rotates, and an opening stopper 1 provided at the lower end of this rod 12 that lifts up the shutter 6
2A, and a closing stopper 12B which is fixed to the intermediate portion of the rod 12 and pushes down the shutter 6 by a delay stroke D with respect to the opening stopper 12A, and a connecting mechanism connecting the operating lever 9 and the shutter 6. , an elastic holding piece 3 located in the middle of the opening/closing stroke of the shutter 6 and having spring drag in both the shutter 6 closing direction and the shutter 6 opening direction, and the spring resistance of the elastic holding piece 3 in the shutter 6 closing direction. The sum of F3D and the spring force F1 of the shutter closing spring 1 in the shutter 6 closing direction (F1+F3D) is weaker than the spring force F2 of the operating means restoring spring 2 in the opening direction, and the shutter 6 of the elastic holding piece 3 There is provided an air venting device for a vehicle characterized in that the spring drag force F3U in the opening direction is made stronger than the spring force F1 of the shutter closing spring 1 in the shutter 6 closing direction.

"Function" According to the above configuration, when the vehicle interior door 10 is closed, the operating lever 9 is closed by the rotation of the rotating arm 8 that comes into contact with the vehicle interior door 10 after the vehicle interior door 10 is about to be fully closed. As the operating lever rotates, the rod 12 descends, and the opening stopper 1
2A moves away from the shutter 6. The shutter 6 is lowered by the spring force of the shutter closing spring 1 and comes into contact with the elastic holding piece 3, and is temporarily held in the open state by the spring resistance F3U of the elastic holding piece 3 in the direction of opening the shutter 6. After that, Rod 1
2 is further lowered, and the closing stopper 12 has a delay stroke D relative to the opening stopper 12A.
When B contacts the shutter 6 and pushes it down, the shutter 6 climbs over the elastic holding piece 3 and is moved to the closed position by the spring force of the shutter closing spring 1, closing the air hole 5.

In this way, the air venting device for a vehicle of the present invention starts operating when the vehicle interior door 10 is about to be fully closed, and the shutter 6 is once held in the open state by the elastic holding piece 3, and then the air vent is opened. 5 is closed, so the vehicle interior door 1 is closed without being affected by the temperature.
Delaying the closing of the air hole 5 with respect to the closing operation of 0,
To prevent an increase in the pressure inside a vehicle by surely releasing the air inside the vehicle to the outside when the vehicle interior door 10 is closed.

Embodiment Next, an embodiment of the vehicle air venting device of the present invention will be described with reference to FIGS. 1 to 3.

A shutter 6 is provided on the floor surface 4 so that an air hole 5 formed in the floor surface 4 of the vehicle compartment can be opened and closed from above.
A shutter closing spring 1 is provided at the shutter closing spring 1. The shutter closing spring 1 always biases the shutter 6 in the closing direction, and also sets a sealing pressure when the shutter 6 is closed. An operating means 11 is provided on the side wall 7 of the vehicle compartment.
This operating means 11 includes a rotating arm 8 that is rotated by contact with a contact portion 10A that forms a part of the vehicle interior door 10, an operating lever 9 that is fixedly connected to this rotating arm 8, and a rotating arm 8 that is operated by the rotating arm 8. Lever 9
Spring 2 for restoring the operating means that urges the opening direction
has. A rod 12 is suspended from the operating lever 9, and an opening stopper 12A is provided at the lower end of the rod 12.
2, a closing stopper 12B is fixed at a distance from the delay stroke D. Rod 12
is passed through the elongated hole 6B made in the shutter 6,
It forms a connection mechanism that connects the operating lever 9 and the shutter 6. In the middle of the opening/closing stroke of the shutter 6, there is provided an elastic holding piece 3 shown by a solid line, which is located at the bottom of the shutter 6 when the shutter 6 is in the open position. The elastic holding piece 3 may be provided so as to extend the shutter 6 to the rear of the rotating shaft 6A and engage with this extended portion 6C, as shown by the two-dot chain line in FIG.

The downward spring force F1 of the shutter closing spring 1 and the downward spring drag force F3D of the elastic holding piece 3
As shown in the formula below, the sum of the above is made weaker than the upward spring force F2 of the spring 2 for restoring the operating means.

F2>F1+F3D Furthermore, the elastic holding piece 3 has spring drag on both the upper and lower sides, and the upward spring resistance F3U of the elastic holding piece 3 is greater than the downward spring force F1 of the shutter closing spring 1. has been done.

F3U>F1 "Operation" According to the air vent device of this embodiment with the above configuration,
The following operations are obtained when the vehicle interior door 10 is opened and closed.

(During door opening operation) When the vehicle interior door 10 is opened, this vehicle interior door 10
Since the contact portion 10A leaves the rotating arm 8, the spring force F2 of the operating means restoring spring 2 causes
When the operating lever 9 rotates upward and the rod 12 is pulled upward, the opening stopper 1 is opened.
The shutter 6 is lifted by 2A. The upward spring force F2 of the spring 2 for restoring the operating means is
Downward spring force F of shutter closing spring 1
1 and the downward spring drag force F3D of the elastic holding piece 3, the shutter 6 overcomes the elastic holding piece 3, so the shutter 6 is moved to the open position and becomes the shutter open state.

(During door closing operation) When the vehicle interior door 10 is closed, the contact portion 10A comes into contact with the rotary arm 8 just before the vehicle interior door 10 is fully closed, and the operating lever 9 is rotated in the closing direction by the rotary arm 8. Therefore, the upward spring force F2 of the spring 2 for restoring the operating means no longer acts.
The rod 12 is moved downward by the operating lever 9, and an opening stopper 12 at the lower end of the rod 12 is moved downward.
A moves away from the shutter 6. The shutter 6 is rotated downward only by the downward spring force F1 of the shutter closing spring 1, and when it comes into contact with the elastic holding piece 3, it is temporarily held in the open state by the upward spring force F3U. Since the shutter 6 remains open until the closing stopper 12B of the rod 12 pushes the shutter 6, the air inside the vehicle escapes from the air hole 5, thereby preventing the pressure inside the vehicle from increasing. Thereafter, after the delay stroke D, when the closing stopper 12B pushes the shutter 6 downward, the shutter 6 overcomes the elastic holding piece 3 and is pushed down to the half-closed position, and the spring force F1 of the shutter closing spring 1 It becomes closed state.
The shutter 6 maintains a steady sealing pressure by the shutter closing spring 1.

"Effects" As described above, the air venting device of the present invention has the above configuration, and when the vehicle interior door is closed, it starts operating when the vehicle interior door is about to be fully closed, and furthermore, the shutter is closed. After being held in the open state by the elastic holding piece, it is pushed down by the closing stopper to overcome the elastic holding piece, and the air hole is closed by the spring force of the shutter closing spring. In this way, the system does not use a damper filled with grease like the conventional air vent system for vehicles mentioned above, but instead delays the closing of the air vents in response to the closing operation of the passenger compartment door, so it is not affected by the temperature. This is an excellent feature that allows the air inside the cabin to escape to the outside when the cabin door is closed, thereby avoiding an increase in cabin pressure, preventing pressure sensations in the ears, and preventing the cabin door from closing smoothly. effective.

In addition, unlike conventional air vent devices for vehicles, there is no need to engage or disengage the damper with the partition plate depending on the sliding direction of the partition plate, which eases the accuracy of assembling each part. effective.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an air venting device for a vehicle according to an embodiment of the present invention, FIG. 2 is a front view showing its mounting position, and FIG. 3 is a sectional view taken along the - line in FIG. 2. 1... Spring for closing the shutter, 2... Spring for restoring the operating means, 3... Elastic holding piece, 4...
...floor, 5...air vent, 6...shutter, 7...
Side wall, 8...Rotating arm, 9...Operation lever, 1
0... Vehicle interior door, 12... Rod, 12A... Opening stopper, 12B... Closing stopper, D...
...delayed stroke.

Claims (1)

[Scope of Claim for Utility Model Registration] In a vehicle air vent device that releases air from the passenger compartment to the outside when the passenger compartment door is closed, the device is provided on a side wall of the passenger compartment and is installed on the passenger compartment door when the passenger compartment door is about to be fully closed. An operating means having a rotating arm that abuts and rotates in the closing direction, an operating lever fixed to the rotating arm, and a spring for restoring the operating means that biases the rotating arm and the operating lever in the opening direction; a shutter which is provided so as to be able to open and close an air hole drilled in the floor surface of the shutter from above and has a shutter closing spring that always biases the shutter in the closing direction; a rod that rises as the shutter moves and descends as the operating lever rotates in the closing direction; an opening stopper that is provided at the lower end of this rod to lift up the shutter; It has a closing stopper fixed to the middle part of the rod and pushing down the shutter,
a coupling mechanism connecting the operating lever and the shutter; and an elastic holding piece located midway through the opening/closing stroke of the shutter and having spring drag in both the shutter closing direction and the shutter opening direction, the elastic holding piece closing the shutter. The sum of the spring force in the shutter closing direction and the spring force in the shutter closing direction of the shutter closing spring is weaker than the spring force in the opening direction of the operating means restoring spring, and the spring force of the elastic holding piece in the shutter opening direction is less than the spring force in the shutter opening direction. An air vent device for a vehicle, characterized in that the spring force of the closing spring is stronger than the spring force in the shutter closing direction.