JPH02159403A - Flexible washer - Google Patents

Abstract

PURPOSE:To make it possible to perfectly tighten a bolt and a nut without using any special fittings even in the case when the surface of part with which the bolt and the nut come in contact is not parallel by tightening the bolt with a pair of flexible washers respectively having spherical contact faces of concave and convex types. CONSTITUTION:A pair of flexible washers 5 consist of a convex type washer 5a and a concave type washer 5b. At the time when parts 1 and 2 are tightened together in an inclined state at one point, slippery state takes place between the concave type washer 5b and the part 1 to decrease the angle of inclination and a gap takes place toward a bolt. Accordingly, a slip prevention plate 7 is inserted into a groove provided on the bottom of the concave washer 5b, and when tightening is finished, the protruded part of the slip prevention plate 7 is bent upward to prevent the concave tape washer 5b from slipping. When there are a plural number of points to be tightened, it is not necessary to do the same. By using delivery of the standard stock of flexible washers, it is possible to assemble and tighten parts on most of the inclined faces and, addi tionally, it is possible to adjust the angle after assembling them, and consequent ly, it contributes to the decrease of the assembling man-hour.

Description

[Detailed Description of the Invention] "Industrial Application Field" When parts are assembled at an angle to the mounting surface, or when the fastened surface of the part is non-parallel to the surface in contact with the mounting bolt. The present invention relates to a washer that can be assembled without using special mounting fittings.

``Problem to be solved by the invention'' When installing a component at an angle to the mounting surface, a specially manufactured mounting bracket is always required, and if the angle is not suitable, the mounting bracket must be re-installed. It had to be rebuilt.

[Means for solving the problem] As mentioned above, bolts that can be assembled freely within the angle range using standardized parts without using special mounting brackets. We have devised a washer whose contact surface can move freely in parallel.

"Example" Parts that come into contact with bolts (3) and nuts (4) when joining two parts (1) and (2) using a general bolt connection, excluding methods such as welding. If the surfaces of 6) becomes necessary.

Also, I was not satisfied with the shape of the mounting bracket after assembly.
It may be necessary to re-make the mounting fittings again, resulting in immeasurable losses in terms of time and cost.

Therefore, a flexible washer (5) was devised as shown in Fig. 3, which does not create a gap between the fastening surfaces.

If you use this flexible washer, even if the angle of inclination changes, the concave washer (5b) will always maintain a posture that adapts to the angle of inclination.
will slide on their own, leaving no gaps on the fastening surface, allowing for complete fastening.

The flexible washer (5) is the convex washer (5a) shown in Figure 5.
) and a concave washer (5b) shown in Figure 6, each having a convex and concave spherical contact surface.
If the two sets of flexible washers (5) are used to clamp one part and tighten the bolts, there will be no gap during fastening, as shown in Figure 1.

When two parts (1) and (2) are fastened in one place in an inclined state, it becomes easy to slip between the concave washer (5b) and part (1), and the angle of inclination becomes small, resulting in a problem with the bolt. A gap will occur.

For this purpose, as shown in Figure 3, a slip prevention plate (7) with a hole for passing the bolt (3) is used, and this concave washer (
5b), and point the part of the anti-slip plate (7) that protrudes from the adjustable washer (5b) in the direction where the concave washer (5b) may slip after fastening. Assemble and tighten.

Once the fastening is completed at a predetermined angle, bend the protruding part of the anti-slip plate (7) upward so that it is in close contact with the concave washer (5b) to prevent the concave washer (5b) from slipping. .

However, when there are a plurality of fastening points as shown in FIG. 4, the inclination angle is fixed, so there is no need to use the anti-slip plate (7) in combination.

``Effects'' Several types of flexible washers can be kept in stock according to the bolt diameter, and manufacturing costs can be significantly reduced by using plastic molding and metal gui-casting methods. There is no doubt that this will greatly help shorten the construction period and reduce manufacturing costs.

If this flexible washer is used, there is no need for specially manufactured mounting brackets, unless the angle of inclination is particularly large, and parts can be assembled and fastened on most inclined surfaces by using standard stock flexible washers. The ability to easily adjust the angle during assembly greatly contributes to reducing assembly man-hours.

[Brief explanation of the drawing]

Fig. 1: A state diagram when trying to forcibly fasten an inclined surface using the conventional method. Fig. 2: Conventional construction method using conventional mounting hardware Fig. 3: Assembly state using a universal washer 6 Fig. 4: An assembly state diagram of an inclined part using multiple sets of bolts and a flexible washer. Figure 5: A diagram showing the shape and cross section of a convex washer. Figure 6: A diagram showing the shape and cross section of a concave washer. Figure 7: Anti-slip plate (1) Parts (3) Bolts (5) Flexible washers (5a) Convex washers (6) Mounting brackets (8) Also spacers (2) Parts (4) Nuts (5b) Concave washers (7) Anti-slip plate

Claims (1)

[Claims] 1 convex washer and concave washer with spherical contact surface
An angle-adjustable flexible washer and anti-slip plate are used to assemble two parts at an angle using two sets of these washer sets.