JPS5839999B2 - Automotive door check device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automobile door checking device capable of holding an automobile door at a preset position, that is, at a predetermined opening degree.

When the car stops on a slope and you try to open the door,
- The slope of the slope and the gravity of the door will cause the door to open or close without remaining in the desired position.

Furthermore, even when the vehicle is stopped on level ground, if a gust of wind occurs when the door is opened, the door may open or close without remaining in the desired position.

Furthermore, even when the vehicle is parked on level ground, if a gust of wind occurs when the door is opened, the door will not remain in the desired position and will suddenly close or open again, which is very dangerous.

Therefore, a door check device that maintains the door opening angle is required, and the door check device has a large holding force to maintain the door angle, and the operating force for opening and closing the door is small and can be operated smoothly. Therefore, in the conventional device shown in Fig. 1, which is generally well known, one end is pivotally connected to the pillar of the body (the path shown in the figure) through the mounting hole 1a. On the other end, a lever 1 embedded in the door (path shown) is pressed and displaced by a holding member 2 fixed to the door side in response to the door opening operation, and the door opening degree is controlled by its frictional sliding force. Hold.

In the case 3 of the holding member, balls 5 and 5', which are sliding bodies, are urged onto the lever 1 in the door opening direction by springs 4, 4' which are elastic bodies, respectively.

Convex portions 1 b and 1 b' are formed on the other end side of the lever 1 to regulate the fully open position of the door.

Reference numeral 6 denotes a buffer member for buffering contact with the case 3 when the door is fully opened, and is fixed to the stopper plate 1, and the plate 7 is locked to the other end of the lever 1 by a pin 8.

Therefore, when the holding member moves in the door opening direction, that is, in the right direction with respect to the lever 1 in FIG.
, 5' and the lever 1 act against the urging force of the balls 5, 5', so the sliding resistance between the balls 5, 5' and the lever 1 becomes smaller, so the door opening operation force is reduced. Even if the holding member 2 is small, the holding member 2 can be held at an appropriate position on the rail 1 by the urging force of the balls 5, 5', and the convex portion 1 of the lever 1
After moving over b, 1 b' to the fully open position shown in the first figure, the balls 5, 5 move from that position in the door closing direction.
Since the frictional force between the lever 1 and the ball 5 acts in the direction of supporting the urging force of the balls 5, 5, the sliding resistance between the balls 5, 5', the lever, and the lever 1 becomes large, which makes it difficult to close the door. The operating force is the convex portion 1b, 1 in the door opening operation.
The sliding force is greater than when crossing b', so
Since it requires a large amount of force, the force required to maintain the door opening at the fully open position is large.

In addition, in the door closing operation, the frictional force between the balls 5, 5' and the lever 1 acts to assist the urging force of the balls 5, 5', which has an adverse effect, and the sliding resistance at that time is large. The door closing operation force is inevitably larger than the door opening operation force, which has undesirable drawbacks such as causing a door ajar state, that is, a state in which the door has not completely returned to the fully closed position.

Therefore, in order to eliminate the above-mentioned drawbacks, the present invention provides at least two types of sliding parts for frictional sliding action with the lever of the holding member, such that the sliding part is small on the front side in the door opening direction and large on the rear side. The purpose of the present invention is to provide a door check device for an automobile that can have a large holding force when the door is fully opened by applying sliding resistance, but can operate smoothly with the same operating force in both directions of opening and closing the door at the same opening position. .

A first embodiment of the device of the present invention will be described below with reference to the drawings.

First, FIG. 2 shows the installed state of the device of the present invention, in which the door check device 10 has a bracket 12 fixed to a pillar 11 of the body and one end of a lever 13 pivoted by a pin 20.

Reference numeral 14 indicates a door, and a holding member 15 is attached to the bolt 1 on the door.
The holding member 15 is fixed at the lever 1 in response to the door rotation movement using the hinge position 16 of the door 14 as a fulcrum.
3. Slide displacement on top.

A stopper plate 17 for regulating the displacement of the holding member 15 is fixed to the other end of the lever 13, and a buffer member 18 is disposed on the stopper plate 17 for damping the impact of the contact.

Further, the stopper plate 17 is fixed to the lever 13 with a pin 21.

As shown in the third figure, the lever 13 is rod-shaped and has a large diameter portion 13a approximately in the center and small diameter portions 13b on both sides thereof.

13c is provided to form a convex portion by the small diameter portions 13 b and 13 c, and the large diameter portion 13 a and the small diameter portion 13 b t 13
Inclined boxes 13d and 13e having the same inclination angle θ as c
Continuously formed.

A cover 23 of the holding member 15 is integrally fixed to a plate 22.

22a. Reference numeral 23a indicates a mounting hole for the bolt 19.

An elastic body 24 that acts as a spring is inserted into the case 22 and the cover 23, and under the biasing action of the elastic body 24, the sliding body 2 clamps the lever 13 and generates sliding resistance.
5 is installed.

The sliding body 25 includes at least two types of shoes 25a having different sliding resistances.

25b, the friction coefficient of the shoe 25a on the pillar 11 side, that is, the left side in FIG.
Let the friction coefficient of b be μ2 (μ2<μm).

The operation will be explained below. When the door is fully closed, the holding member 15
The small diameter portion 13b is located at the solid line position in the figure, and the small diameter portion 13b
The vehicle moves to the right and eventually approaches slope 13d.

Then, the shoe pressing force P0 at the contact point A between the shoe 25a and the small diameter portion 13b due to the elastic body 24, and the shoe 25
The shoe pressing force at the contact point between b and diagonal [1n13d is assumed to be P2 (P2>Pl).

Further, the inclination angle of the slope 13d is assumed to be θ (0<θ<90°).

Therefore, the sliding load F of the holding member 15 in the door opening direction at this time
1 is a shoe 25a at the contact point A2.

It is the sum of the sliding loads of 25b.

F, = μI P l+ P 2 (stnθ+μ2 c
osθ)...■ Eventually, the holding member 15 will be attached to the large diameter portion 1.
3a, the door opening degree is half, and in this case, the elastic body 24 increases the spring load due to the reduction of the molten volume due to the large diameter portion 13a, so the sliding load of the sliding body 25 increases. The force for holding the door opening degree is increased compared to the case where the opening is on the small diameter portion 13b, and a desired arbitrary door opening degree can be maintained.

In order to bring the door into the fully closed position, the door is further displaced in the opening direction, that is, the holding member 15 is moved down the slope 13e and into the small diameter portion 13d, so that the holding member 15 has both sides connected to the buffer member 18 and the slope. The door is held in the fully open position by being in contact with the door 13e and its displacement is restricted, and when the door attempts to act in the door closing direction from this fully open position, that is, when the holding member 15 4. When the two-dot chain line position shown in the figure (a position symmetrical to the solid line position shown in the fourth figure) is reached, the contact point between the shoe 25a and the slope 13c is ``A'', the contact point between the shoe 25b and the small diameter portion 13d is ``A'', and the contact point is made by the elastic body 24. The pressing force of the shoe 25b at the mouth' can be P2, and the pressing force at the contact point A' can be Pl, and the sliding load F2 of the holding member 15 in the door closing direction is equal to the contact point 472.
This is the sum of the sliding loads of the shoes 25 a t 25 b at the mouth.

Therefore, F2=μ2P1+P2(sinθ+μI CO3−□I
Sinθ)・・・・・・■ The magnitude relationship between F1 and F2 is ■-θ)/(cosθ μm-μ2〉02P2-Pl〉O O<(cosθ-μm sinθ)(cosθ-μ2
Sin θ)<1, therefore, F2-Fl>0 Therefore, F2>Fl Therefore, the sliding load in the door closing direction due to the fully opening of the door is larger than that in the door opening direction, and it is possible to reliably hold the door in the fully open position.

In the door closing operation, when the holding member 15 climbs the slope 13e, the sliding load of the shoe 25 acts largely to increase the holding force, but after that, the door is closed with a sliding load similar to the sliding load in the opening operation. Can be closed.

The custom sliding load is shown in Figure 5. The positive value of F indicates the door opening operation, and the negative value indicates the door closing operation. F is maximum when the door acts in the closing direction from the fully open position. In other operations, F at the same position in both the opening and closing directions is approximately the same.

Next, a second embodiment of the device of the present invention will be described.

This embodiment differs from the first embodiment only in the structure of the elastic body 24 and the sliding body 25 of the holding member 15.
7 for different elastic modulus. 2 (K2>K1), and the pillar side is arranged as 24a, and the sliding body 25 has a friction coefficient μ (μ-tanρ) on its sliding surface with the lever 13. It should be uniform.

When the shoe 25 has two contact points with the lever 13 in the door opening direction as in the previous embodiment, the elastic body 24
The amount of deflection of b is δ1, and the amount of bending of living body 24a of bullet i is δ2 (δ2 × δ1), and the sliding load F3 in the door opening direction generated at that time is F 3 = tan (θ+ρ)Kl
δ1+μ and 2δ2...■ And the sliding load F4 in the door closing direction that occurs when the shoe 25 makes contact with the lever 13 in the door closing direction at A'2' is F4=tan(θ+ρ)" K2δ1+μ to 1δ2・
...■The size relationship between F3 and F4 is: ■-■ F4 F3-(K2 Kt) (tan(θ+ρ
)・δ1−μδ2) Here, 2 > K1 tan (θ+ρ)>μmta
Since nρ, F4-F3>0 Therefore, F4>F3, and the sliding load customization is as shown in FIG. 5, which is the same as in the previous embodiment.

Next, a third embodiment of the device of the present invention will be explained with reference to FIG. 8. This embodiment is different from the second embodiment described above in that the elastic body 24 is formed of one type, and its shape is changed to the outer surface as shown in FIG. is shaped like a circular pedestal, and the outer diameter of the pillar side is flattened to maintain the elastic modulus.
Also, the amount of deflection is increased for the same load.

Therefore, it is obvious that the sliding load characteristics in this configuration are similar to those in the second embodiment.

As described above, according to the device of the present invention, the holding member that slides on the lever in response to the opening of the door has a sliding body that slides on the lever, and a bullet that urges the sliding body toward the lever side. The friction coefficient of the sliding body or the elastic coefficient of the bullet body is changed along the door opening/closing direction, so that the sliding resistance of the holding member is small on the front side in the door opening direction. In addition, the rear side is made larger so that the sliding load in the door closing direction at the fully open position is maximized, and at the remaining positions, the sliding load is approximately the same in both door opening and closing directions, so that the sliding load is maximized when the door is opened at the fully closed position. This has excellent practical effects, such as ensuring that the opening angle is maintained reliably, and the operating force in both opening and closing directions is the same for other door openings at the same position, allowing smooth operation.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an example of the conventional device, FIG. 2 is an explanatory diagram showing the installed state of the device of the present invention, FIG. 3 is a sectional view showing the first embodiment of the device of the present invention, and FIG. An explanatory diagram showing the operating state of the first embodiment of the invention, FIG. 5 is a sliding load characteristic diagram of the invention, FIG. 6 is a sectional view showing the second embodiment of the invention, and FIG. An explanatory diagram showing the operating state in the second embodiment, and FIG. 8 is a sectional view showing the third embodiment of the present invention. 14...Door, 13...Lever 15
...Holding member, 10...Door check device, 24...Elastic body, 25...Sliding body, 25 a, 25 b...・Shoo.

Claims (1)

[Claims] 1. In an automobile door check device having a holding member that maintains an appropriate door opening degree by slidingly displacing the lever without being pressed in response to a door opening operation, the lever has a convex portion that defines a fully open position of the door. formed through an inclined surface, and the holding member is formed from a sliding body that slides on the lever and an elastic body that urges the sliding body toward the lever,
The coefficient of friction of the sliding body or the coefficient of elasticity of the elastic body is varied along the door opening/closing direction so that at least two different types of sliding resistance are applied to the holding member on the front side in the door opening direction. Automobile door check device provided.