JPH02203006A - Thin plate fastening fitting - Google Patents

Abstract

PURPOSE:To enable installation of a work of 10mm thickness by using for example, an M8 hexagon socket head cap screw by setting measures of outer and inner stepped parts shorter than that of a stepped part of an installed work by 0.1 to 0.5mm. CONSTITUTION:A thin plate fastening fitting 14 fastens an installed work 12 is to an installation surface 13 by means of a hexagon socket head cap screw 11 to the extent that no gap exists between the installation surface and the work. For example, the head height of the hexagon socket head cap screw for M8 is 8mm, so that the total height including abrasion margin of a sliding plate, etc. and thickness for keeping strength of a fastening part is 12 to 15mm. In order to install a sliding plate of 10mm thickness, an M6 screw is required conventionally, but an M8 hexagon socket head cap screw is adaptable with this construction.

Description

[Detailed description of the invention] (Industrial application field) The present invention is defined in the Japanese Industrial Standards.

The present invention relates to a thin plate fastening metal fitting used when attaching a dynamic member such as a slide plate guide bushing to a main body using a hexagon socket head bolt.

(Prior Art) Conventionally, the diameter and height dimensions of the hexagonal hole portion of the hexagonal socket bolt according to the Japanese Industrial Standards have been standardized based on the nominal dimensions of the threaded portion.

For example, the head diameter of an M8 hexagon socket head bolt is defined as 13 mm and the head height as 8rnrn.

Therefore, when M8 thread strength is required, the thickness of the slide plate, etc. must be adjusted to include the wear allowance of the slide plate (usually about 1 mm) and the wall thickness required to maintain the strength of the tightening part with hexagon socket head bolts (usually 3 mm). ~6mm) plus 12
~15mm.

(Problem to be solved by the invention) However, due to the space of the mounting part, M
When installing a 10mm thick slide plate using 8 screws, either reduce the screw size to M6 and increase the number of 9 screws by the reduction in screw strength, or add additional work to the standard hexagon socket head bolts to increase the head. The first method is to manufacture and install special products with low resistance.

Naturally, an increase in the number of screws and an increase in the number of hexagon socket head bolts used will result in an increase in the number of machining steps and an increase in the number of assembly steps.The production of special hexagon socket head bolts not only increases costs, but also reduces maintainability. It was extremely inconvenient.

(Means and effects for solving the problems) The present invention has been made by focusing on such conventional problems, and it is possible to install a 10 mm slide plate using the M8 hexagon head bolts of the above example. It is what makes it possible.

In other words, by using a ring-shaped metal fitting as shown in the embodiment drawings of this specification, which has a step for fixing a sliding member such as an outer 11114 Ni slide plate and a step for tightening with a hexagon socket head bolt on the inside. It will be resolved.

By using the thin plate fastening fitting of the present invention, the tightening force can be evenly distributed.

When directly tightening with a standard M8 hexagon socket head bolt, the bolt pilot hole diameter is φ9mm, and the hexagonal hexagonal bolt head is 13mm, so the area of the tightening seat is mini π/4 (13ku 9").
)=69mm2. In the products of this invention, each g122rnms1
8 mrn, and the area of the tightening seat is A, = π/4 (22'
-18") = 125.6, which is about twice as much. Furthermore, the distance from the tightening center has increased from R, = s 13/2-6.5 to R2 = 122/2-11, which is about twice as much. This also improves the stability of workpieces such as slide plates.
Next, the gap of 0.1 to 0.5 mm between the bottom and the mounting surface, which is directly tightened with the hexagon socket head bolt that is a component of the present invention, absorbs variations in tolerances of thin plate fasteners and related parts. At the same time, it has the effect of constantly applying tensile stress to the cylindrical portion of the thin plate fastening fitting.

By forcibly tightening the gap with the hexagon socket head bolt, an effect of preventing the hexagon socket head bolt from loosening is produced.

(Example) Examples of the present invention will be described below based on the drawings. Third
Figures 1 and 4 show one embodiment of the present invention. 1 Thin plate fasteners 14 and 24 of the present invention are arranged in the positions shown in Figures 3 and 4, and hexagon socket head bolts are used regardless of the specified torque. It can be assembled by tightening it until there is no gap between it and the mounting surface.

(Effects of the Invention) As explained above, by using the thin plate fastening fitting according to the present invention, the thickness of the workpiece such as the slide plate can be reduced when attaching the slide plate to the main body using conventional hexagon socket head bolts. In the example shown in Fig. 3, the workpiece had to be thicker than the head height of the hexagon socket head bolt to be used, but in the example shown in Fig. 3, an M8 hexagon socket head bolt was used and the workpiece was
In the example shown in Figure 4, M8 hexagon socket head bolts are used to
Workpieces with a thickness of m can be tightened.

It also serves as the basis for bolt tightening work. Torque value, axial force,
Accurately performing locking has a great effect on the industrial world.

To give you an example of the effect, when installing 100 to 150 slide plates on the driving surface of a press mold for forming an automobile exterior panel, installing a 15mm or 20mm slide plate would reduce the total weight. 400-
It reaches 500Kg. By reducing the thickness to 5 mm or 10 mm, the weight can be reduced to 150 to 250 kg, resulting in cost reduction.

Although the parts cost of the thin plate fastening fitting of the present invention is additional, it provides great benefits.

Further mentioned above. There is no need to cut the head of the hexagon socket head bolt or produce a hexagon socket head bolt that does not meet the Japanese Industrial Standards with additional machining, which is advantageous in terms of equipment maintenance.

4,

[Brief explanation of the drawing]

Fig. 1 is a diagram of the thin plate fastening fitting of the present invention, and Fig. 2 is a cross-sectional view of the installation state when using normal hexagon socket head bolts. --Indicates the mounting surface. FIG. 3 is a cross-sectional view of the mounting state of the embodiment of the present invention, showing 11--hexagon socket head bolt 12--work to be mounted 13--mounting surface 14--the thin plate fastening metal fitting of the present invention. FIG. 4 is a cross-sectional view of the mounting state of an applied embodiment of the present invention, and shows a 21-m hexagon socket head bolt 22-1 a workpiece 23-1 a mounting surface 24-1 and a thin plate fastening metal fitting of the present invention. Figure 3 Figure 2 Figure 4I311

Claims (1)

[Claims of Claims] A ring-shaped tightening fitting having a stepped part on the outside for tightening a workpiece and a stepped part on the inside for tightening with a hexagon socket head bolt, in which the dimensions of the outer stepped part and the bottom of the inner stepped part are tightened. A ring-shaped thin plate fastening fitting that is manufactured to be 0.1 to 0.5 mm shorter than the stepped part of the workpiece.