JPH0311336Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a door check device for a vehicle.

The check arm in conventional vehicle door check devices has been improved from a sheet metal combination product itself to a synthetic resin coating, which has made it possible to greatly approximate the desired operating force characteristics when opening and closing the door, and to prevent the check arm from rusting. This results in improved durability. However, there is still room for improvement in the above-mentioned operating force characteristics, and it is further desired that the check device as a whole be reduced in noise generation and improved in durability.

The present invention was developed in response to the above-mentioned needs.The check arm is made of a single sheet metal with a constant thickness, and the upper and lower surfaces of the core metal are coated with synthetic resin, and the thickness of the coating resin at the middle part in the longitudinal direction is measured. The cross section is thickened to a table-like shape to form a bulge, and the synthetic resin surface that slides against the shoe (to be described later) is formed into a rough surface. In addition to applying hard chrome plating to the surface, the sliding surface of the check arm is made flat, and the surface of the shock absorbing rubber plate in the stopper mechanism is also made rough, improving operating force characteristics and increasing durability. To provide a door check device for a vehicle configured to improve performance and prevent abnormal noise.

Hereinafter, the present invention will be explained based on an embodiment shown in the drawings.

Fig. 1 is a plan view showing the entire device of the present invention when the door is closed, and Fig. 2 is an enlarged cross-sectional view taken along the - line in Fig. 1, in which 1 is a pillar provided on the vehicle body, 2 is a bracket, 3 is a door, 4 is a check arm, 5 is a sheet metal core, 6 is a synthetic resin, 7 is a pivot pin, 8 is a check clamp assembly member, 9 is a case, 1
0 is a shoe, 11 is an elastic member, 12 is a stopper,
Reference numeral 13 indicates a buffer rubber plate. Therefore, the synthetic resin 6 is made of a core metal 5 made of a single sheet metal with a constant thickness.
This is a covering portion formed by injection molding with resin on both the upper and lower surfaces of the bracket, and as shown in FIG. 3, a rough surface 6a having fine irregularities is formed on the upper and lower surfaces except for the surface where it joins with the bracket 2. The rough surface 6a is generally formed to have a large roughness at the bulging portion of the check arm thickness (the portion having the thickness shown in FIG. 2d), and a finer roughness at other portions. Further, as shown in FIG. 4, a rough surface 13a is also formed on the surface of the buffer rubber plate 13 on the side of the anti-check clamping assembly member 8.

FIG. 5 is a perspective view of the shoe 10. The surface of the metal shoe is plated with hard chrome, and the sliding surface that contacts the check arm 4 is formed into a flat surface 10a. Note that the winged arrow symbol shown in FIG. 1 indicates the direction of movement of the check arm 4 when the door is opened. Moreover, the elastic member 11 in FIG.
Specifically, elastic rubber is shown, but a spring may also be used. FIG. 6 shows a plan view of the device at the limit of door opening (overrun).

In the above structure, the check arm 4 rotates around the pivot pin 7 as the door 3 is opened and closed, and the check holding assembly 8 moves along the longitudinal direction of the check arm 4. The above movement is performed between the upper and lower rough surfaces 6a of the synthetic resin 6 and the sliding plane 10a of the shoe 10.
It is a sliding movement. The sliding resistance is generally the operating force of the door, or in other words, it is also the resistance of trying to grasp the door opening position. The magnitude of the above-mentioned operating force is approximately determined by the biasing pressure applied to the shoe 10 by the elastic member 11, the thickness of the check arm, and the resistance of the synthetic resin rough surface 6a. Door 3 is at the beginning of its opening,
In the middle stage, the arm is thin, so it opens smoothly and lightly, but when the shoe 10 hits the bulge in the arm's thickness, resistance increases and the opening speed slows down, preventing the door from overrunning. become. Figure 7 shows the door operating force F (solid line) of the present device having a rough surface 6a on the check arm and the door operating force F' (dashed line) of a conventional device having a check arm without a rough surface, with respect to the door opening degree. This is an example of comparison. In other words, the door operating force with the rough surface is slightly larger than that of the conventional door from the beginning to the middle of opening the door.
The bulge in the thickness of the arm does not have the undulations of the conventional type, making the door opening operation easier in general, and the tendency of the door to overrun is significantly prevented. In addition, the roughness of the rough surface 6a can be freely selected depending on the position in the longitudinal direction of the arm, which greatly contributes to the design of the door operating force setting.

Next, since the shoe 10 is plated with hard chrome, its wear resistance and immediate durability are improved, and since the sliding surface is formed into a flat surface 10a, the surface pressure of the check pressure is lower than that of the conventional circular arc shape. Dispersion is reduced and durability is improved.

Furthermore, as shown in FIG. 6, the rough surface 13a provided on the cushioning rubber plate 13 has the following characteristics: Component force fs of f on the rough surface 13a
works to move the buffer rubber plate 13 and the case 9 relative to each other on the rough surface, but the relative movement is prevented by the resistance of the rough surface, and the abnormal noise that occurs in the conventional one is hardly generated. The component force fn of the reaction force f perpendicular to the rough surface 13a only presses the case 9 in its axial direction.

As described above, the present invention has been able to greatly improve the performance of the door check device by simplifying the structure and processing it at low cost to the conventional device.

[Brief explanation of the drawing]

The drawing shows one embodiment of the present invention.
The figure is a plan view of the device with the door closed, Figure 2 is an enlarged sectional view taken along the - line in Figure 1, Figure 3 is a perspective view of the check arm to which the case and the stopper with a cushioning rubber plate are attached, and Figure 4 5 is a perspective view of the shock absorber plate, FIG. 5 is a perspective view of the shoe, FIG. 6 is a plan view of the device in the extreme state of opening the door, and FIG. 7 is a diagram of door opening versus door operating force. 1: Pillar, 3: Door, 4: Check arm,
5: sheet metal core, 6: synthetic resin, 6a: rough surface,
7: Pivot pin, 8: Check clamping assembly member, 9: Case, 10: Shoe, 10a: Plane (of shoe),
12: stopper, 13: buffer rubber plate, 13a: rough surface, d: thickness of bulge.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A check arm that is pivotably supported horizontally on a pillar of a vehicle body and has paired bulges formed on both upper and lower surfaces of its longitudinally intermediate portion;
A case is fixed to the hinge mounting side of the door and the check arm passes through the inside thereof, and the check arm is slidably pressed against both the upper and lower surfaces of the check arm by the action of an elastic member housed in the case and provided on each back part of the case. In a door check device equipped with a pair of upper and lower shoes, the check arm has a core made of sheet metal formed from a single flat plate with a constant thickness, and both upper and lower surfaces of the concentric metal are coated with synthetic resin. to form a sliding surface for the shoe and to form the sliding surface into a rough surface, and at the same time, the coating thickness of the synthetic resin at the longitudinally intermediate portion of the core metal is increased to form the bulged portion. A door check device characterized by the following: 2. The door check device according to claim 1, wherein the surface of the metal shoe is plated with hard chrome. 3 Paragraph 1 or 2 of the claims for utility model registration in which the sliding surface of the check arm of the shoe is flat
Door check device as described in section.