JPH03140616A - Pivot bearing - Google Patents

Abstract

PURPOSE: To prevent contact of an arm with a mounting plate and a fixing member, by providing a material having wear resistance and self-lubricity in a pivot bearing, in a window stay structure. CONSTITUTION: A pivot bearing is a friction bearing between an arm 10 and a mounting plate 11, and is provided with an inserting member 16 such as nylon having wear resistance and self-lubricity. When the pivot bearing is assembled, the inserting member 16 is placed in an opening 12. When the arm 10 and the mounting plate 11 are combined with each other, a standing portion 14, a hollow cylindrical projection forming a hole 13 in the mounting plate 11, is arranged in the opening 12 of the arm. Since the inserting member 16 is provided with a sleeve 17, contact between metals is avoided. Then, a fixing member 15 is inserted into the hole 13 of the standing portion 14, and is transformed and expanded at the inlet of the hole 13 by bending its tip with a tap or using other means, and therefore, axial movement of the fixing member in relation to the standing portion 14 is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pivot bearing, and more particularly to a pivot bearing formed between a component of a window stay and an installation frame.

[Conventional technology]

When adjusting a window sash to a window frame, a pair of window stays are generally used. Such stays can be arranged so that the sash acts as a casement or awning as a window. In order to operate the window correctly, especially when "retraction" is concerned, the stays must be of the same size and shape and must be constructed to work in matched pairs. In order to set the dimensions and shape accurately, the pivot bearing must be formed accurately, and thermal theory,
The center of the pivot bearing must be positioned squarely. If there is a shift in the rotation center (pivot center), the dimensions and shapes of the stays will differ, and the uniformity of the stays will be impaired.

In modern window stays, the pivot bearing typically acts as a friction bearing, so it is also important to stabilize the friction level within the bearing. Typically, the friction level is set by the pressure within the bearing caused by the bearing fixture. However, in current window structures, the physical dimensions of the sash and the amount of glass attached to it are large, which increases the weight of the sash and places a large load on the friction bearings, which places severe conditions on the friction bearings. May be required. The bearing fixing member integrally holds a plurality of components of the bearing, and in addition to exerting frictional pressure within the bearing, it is also necessary to withstand large shear forces generated in the bearing. the result,
Design problems arise when the dimensions of the fixing member are physically limited to meet requirements for smaller stay dimensions, smaller bearings, or other factors. Dimensional limitations often arise when it is necessary to fit a small stay into the cavity between the window sash and frame.

To this end, in the structure proposed in U.S. Patent No. 4,582,435 by the present applicant, a pivot bearing is formed by a spigot (insertion part) formed by drawing the material metal, and one of the components is It is located within the opening of the second component and the tip of the spigot is rolled to connect the two components together so that they cannot be separated axially. Therefore, the spigot not only accurately centers the bearing, but also increases the load carrying capacity of the pivot bearing.

Moreover, in US Pat. No. 4,721,406 it is proposed to use a separate fastening member in the form of a button instead of rolling the ends of the spigot to fasten the two components together. The tip of the main body of this button (fixing member) is bent below the shoulder formed in the hole of the spigot. In this case, the step of forming a shoulder in the hole of the spigot will be added. Moreover, in practice, it is often difficult to properly bend the button so as to maintain the components accurately fixed together, especially when loads are high. Moreover, when a screw is passed through a pivot bearing to secure the component to a third component (e.g. a window frame or sash), the button is moved axially by the screw, causing friction within the bearing. The generated pressure increases. In this case, if the friction level is too high, the friction level of the bearing will change and the pair of window stays will "harmonize".
If this happens, it becomes a serious problem.

[Problem of the present invention]

It is an object of the present invention to provide a pivot bearing which eliminates or reduces the above-mentioned problems occurring with known pivot bearings.

According to the invention, there is provided a pivot bearing between a first and a second member, the first member comprising an annular wall extending from one side thereof, the wall extending through the first member. a second member defining an outer periphery of a hole extending to a second surface of the second member, the second member having an opening, the wall portion positioned within the opening, and a securing member disposed within the hole; means for preventing axial movement of the members and holding the assembly together, the means being located within the entrance of the hole in the second surface and within the pivot bearing; A wear-resistant and self-lubricating material is provided to prevent the second member from contacting the first member and the wall and fixing member.

Further, according to the present invention, there is provided an indirect connection structure between a first member and a second member, wherein the first member includes an annular wall portion extending from one side, and the wall portion is connected to the first member. forming an outer periphery of a hole extending through the hole to the second surface thereof;
the member has a through opening, the wall portion is located within the opening, a fixing member is disposed within the hole, and a distal end thereof prevents axial movement of the fixing member to secure the assembly. a radial deformation for holding together, the radial deformation located within the entrance of the hole in the second surface, and a wear-resistant, self-lubricating material within the pivot bearing. A material is provided to prevent the second member from contacting the first member, the wall and the bearing.

〔Example〕

Next, the pivot bearing according to the present invention will be explained in more detail with reference to the illustrated embodiment.

The pivot bearing according to the invention is of a structure suitable for forming a friction bearing between two components. Bearings are mainly for use in window stays, so 2
The individual components are, for example, a pair of arms or a mounting plate and an arm. According to known window stay structures, the components are made of stainless steel or aluminum alloy. The pivot bearing according to the invention is particularly suitable for constructions made of stainless steel, since it provides sufficient strength even when the thickness of the components is relatively thin. As a result, small and strong pivot connections can be realized using the present invention.

First, in FIG. 1, the two components are each 10.
It is shown by 11. The first component 10 is, for example, an arm with an opening 12 formed therein. Similarly, the second
The component 11 is, for example, a mounting plate, on which a hollow cylindrical protrusion (hereinafter referred to as the upright part 14) forming the hole 13 is formed. It is preferable that the upright portion 14 is formed integrally with the component 11 by applying drawing υ to the raw metal. This improves the strength characteristics of the upright portion 14 and also provides a means for accurately determining the center of the bearing portion, eliminating the need to rely on accurate centering of the bearing fixing member 15. That is, for example, all of the upright parts of a plurality of bearings provided on a plate or an arm can be formed simultaneously using a suitable tool, and thereby the distances between the plurality of centers can be precisely controlled. .

Other components of the bearing include a bearing fixing member 15 and an insert member 16. Insert member 16 is preferably formed from a self-lubricating, wear-resistant plastic material such as nylon. In the embodiment shown in FIGS. 1 to 3, the insertion member 16 is composed of a sleeve 17 having a flange 18 integrally formed at one end thereof. In the illustrated embodiment, the thickness of the sleeve 17 and the seventh flange 1B are uniform, but this is just an example; as shown in FIGS. Change 71
) to give it an appropriate shape. Figures 4 and 5
As shown, the insert member 16 may be comprised of two separate elements, a seven-lunged sleeve 16a and a separate rimmed washer 16b. Although not shown, the insert can be formed in various ways other than those described above, for example with two washers and a separate sleeve or with a seven-flange sleeve as shown at 16a or 16b. and a separate rimmed washer.

The bearing fixing member 15 is composed of a body 19 and a head or flange 20 provided at one end thereof. Section 2.3.
In the fixed structure shown in Figure 4.5, the body 19 is cylindrical. As shown in FIGS. 2 and 3, the outer peripheral edge 21 of the head 20 may be curved or sloped inward to form a shallow recess 22 inside the lower surface of the head 20. The body 19 can be made entirely hollow by providing a through hole, or can be made entirely of a solid structure. In the case of a solid structure, a small hollow part 19a is formed at the tip. Make sure that bends are allowed.

When assembling a pivot bearing, insert member 16 or 16
m is placed on the upright portion 14 or within the opening 12 of the component 10. When the two components 10.11 are assembled, the upright portion 14 is placed within the opening 12, but metal-to-metal contact is avoided due to the provision of the sleeve 17. Next, insert the fixing member 15 into the hole 13 of the upright part 14 (however, when using the insertion member 16a, the rimmed washer 16b
(first placed in position), the distal end is bent with a tap or otherwise deformed to expand within the entrance of the hole 130, thereby tightening the axis of the fixing member relative to the upright portion 14. Prevent directional movement.

As is clear from FIGS. 1 and 3, this action generates a cold flow under the head 20 of the fixing member 15 at the tip of the sleeve 1T. As a result, in the joint in the completed state, metal-to-metal contact occurs between the fixed member 15 and the first component 10, as well as between the first component 10 and the upright portion 1.
4 does not occur at all.

The level of friction at the joint is determined by the pressure level within the joint caused by the fixing member 15. As shown, the fixing member 15 is preferably provided with a large diameter head 20 so that the nylon is retained between the head and the surface of the component 10 over a large area. A similarly large area nylon section is formed by the seven flange 18 and lies between adjacent surfaces of the component 10.11. Due to the presence of the nylon in such a range and the presence of the large area of the head 20, the desired level of static friction can be achieved without the need for high pressure to be exerted by the fixing member 15 on the nylon. However, such a construction results in a high level of kinetic friction, which culminates in a degree of friction that controls any rapid movement of the window. Therefore, this dynamic friction is
Prevents windows from closing suddenly during strong winds. Furthermore, if such dynamic friction can be achieved, once static friction is exceeded during the opening and closing operations of the window, the window can be operated smoothly.

When used in a window stay, the second component 11 typically forms a fixed component such as a frame or a sash mounting plate. The first component 10 thus becomes a movable arm. As a result, due to the presence of the annular upright portion 14, the fixing member 15 is freed from any load-bearing forces (particularly shear forces). As mentioned above, the centering accuracy of the pivot is set by the integrally molded annular upright portion 14 and is therefore independent of the fixing member 15. The function of the fixing member 15 is therefore to fix both components and to establish a pressure in the joint that determines the friction level in a known manner.

When used for a window stay, the fixing member 15 is
As shown in the figure, it is preferably hollow, so that a fixing device 25 such as a screw (see FIGS. 4 and 5) can be inserted into the window frame or sash 26 through the bearing. It becomes possible. This eliminates the need to provide another screw hole in the mounting plate 11, and furthermore, the presence of the screw in the bearing facilitates the transmission of load from the arm 10 to the sash and frame 26.

As shown in FIGS. 1 and 3, the distal end of the fixing member 15 is bent toward the entrance area 27 at the end of the hole 13. As shown in FIGS. The region 27 is formed at the curved boundary between the peripheral wall of the hole 13 and the surface of the mounting plate 11. The mounting plate surface is a surface that engages with, or is located adjacent to, the surface of the sash or frame 26 when the stay is in use.

On the other hand, in the embodiment of the present invention shown in FIG. 4 and FIG. Not only that, but also such a bent end can be attached to the mounting plate 11.
and the sash or frame 26 so that it can be securely positioned and held. This notch 29 can be formed in a variety of ways, two examples of which are shown in FIGS. 4 and 5. In the "punch and dimple" method shown in FIG. 4, the notch 29 and the protrusion 30 are formed by biasing the metal around the upright portion 14. On the other hand, according to the structure shown in FIG. 5, the metal surrounding the upright portion 14 is tilted and tilted, and in this configuration, the tilted entrance area forms the cutout 29.

By providing the notch 29, a large "7 lunge" is created.
31 is formed by bending the tip of the fixing member 15, which allows the bearing to support a large load. Therefore, it is possible to withstand a large load in a direction perpendicular to the plane of the bearing and arm, that is, a load when attempting to pry open a window.

Furthermore, the metal thickness of the fixing member 15 and the upright portion 14 varies smoothly from the stock thickness at the locations where the greatest deformation occurs when forming the individual parts into their final shape.

In the embodiment shown in FIGS. 4 and 5, the fixing member 15 is "seated" on the frame or sash 26, so that the axial load exerted by the properly tightened fastener 25 is transferred to the frame or sash 26. will have a direct effect on As an alternative structure, the bottom edge of the fixing member 15 is formed into a sawtooth shape, as shown by reference numeral 33 in FIG. 6, to increase the holding force against the sash or frame 26 and firmly hold the bearing in a predetermined position. , and the load bearing capacity can be increased. The serrations also help prevent the final tightening of the screws 25 from rotating the fixing member 15 under the influence of torque. The frame or sash 26 can also be serrated, as shown at 34.

In the bearing structure shown in Figs. 4 and 5, if necessary,
A low-friction bearing with very good load-bearing ability can be constructed. Such a structure can be realized by arranging the flange 31 in the notch 2S on the same plane as the surface 27. In this way, when the fixture 25 is tightened, the fixing member 15 will not move in the axial direction. It is not displaced and therefore does not create excessive or large friction on the bearing. Note that managing "same flatness" can be used as an effective means for changing the friction level in the bearing section.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional front view of a pivot bearing according to one embodiment of the present invention, FIG. 2 is a cross-sectional exploded view of components of the pivot bearing of the second embodiment, and FIG. 3 is a cross-sectional front view of the pivot bearing of FIG.
FIG. 4 is a cross-sectional front view of a pivot bearing according to a third embodiment, FIG. 5 is a cross-sectional front view of a fourth embodiment of a bearing according to the present invention, and FIG.
The figure is a detailed view of the deformed structure in the extent that the folded end of the fixing member engages the surface of a third component, such as a window sash or frame. 10...first component, 11...second component, 12...opening, 13...hole, 14...standing portion, 15...fixing member, 16.9.insertion member,
1T: Sleeve, 2T: Entrance area.

Claims (2)

[Claims] (1) A pivot bearing between first and second members, wherein the first member has an annular wall extending from one side thereof, and the wall extends through the first member. a second member defining an outer periphery of an aperture extending to a second surface, a second member having an aperture, the wall portion located within the aperture, and a securing member disposed within the aperture; having means for holding the assembly together to prevent axial movement;
said means being located within the entrance of said hole in said second surface, said means being provided with a wear-resistant and self-lubricating material within a pivot bearing to said first member and said wall of said second member; A pivot bearing is characterized in that it prevents contact with parts and fixed members. (2) An indirect connection structure between a first and a second member, wherein the first member includes an annular wall extending from one side, and the wall extends through the first member. a second member defining an outer periphery of a hole extending to a second surface of the second member, the second member having a through opening, the wall portion being located within the opening, and a securing member disposed within the hole; The distal end includes a radial deformation to prevent axial movement of the fixation member and hold the assembly together, the radial deformation comprising:
a wear-resistant and self-lubricating material located within the entrance of the aperture in the second surface and within the pivot bearing, the first member and the wall of the second member and the bearing; An indirect connection structure characterized by preventing contact between the two.