JPS6252213A - Device of bolt with washer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention involves fitting and mounting a washer above the main shaft of the pole, keeping the washer at a certain distance so that it does not move freely, and screwing the lower end of the This invention relates to a bolt with a washer whose overhanging edge is formed with an annular protuberance using a protruding piece of a special thread cutting die.

Conventionally, this type of tightening using a washer was done in order to fit the washer onto the bolt and prevent it from falling or being lost.
: Bolts with washers are well known, such as bolts with a plurality of tapered protrusions formed on the outer periphery of the lower end of the shaft, or bolts with a curved annular coating layer.

Of course, as mentioned above, this is a stopper that prevents the washer from falling or being lost.When load stress is applied to the washer, it will prevent the washer from falling, being lost, or slipping if it is bent or bent. This is the cause of the occurrence.

The present invention relates to Utility Model Registration Application No. 068606 filed in 1968, and as mentioned above, the well-known bolt has a washer fitted to the main shaft to prevent the washer from falling or being lost. In short, the bolt with a washer can only be expected to be effective as a temporary restraint until the tightening operation, and the present invention is a device whose application purpose is fundamentally different.

Therefore, in the present invention, a washer is fitted into the upper part of the main shaft of the bolt, and the washer is allowed to freely move at a slight distance, and the lower end of the washer is machined into a protruding annular shape to receive the bolt head. Since the space between the lower surface and the overhanging edge is free to move, for example, a plate material is held between the bolt head and the washer, the bolt is tightened against the base material, and the bolt is rotated. Another method is to insert the end of an automatic city headlamp between the bolt head and washer and tighten it, and the washer and tightening are screwed together. The end of the electric wire that can be inserted into the overhang can be inserted between the bolt is attached to the frame, but since the washer is molded integrally with the port shaft, the plate doesn't hold well and it doesn't even fit, and the groove between the bolt head and washer has to be cut to form a groove. Since the distance between the head and the washer is fixed, the thickness of the plate is variable, so you have to use bolts with a different distance from the above. There's no way.

In this way, the present invention has a reliable tightening effect during screwing, in which the free movement of the washer is ensured, and the bolt head and washer can be tightened, and the washer and the overhanging edge can be tightened.
In particular, the strong overhanging green that supports the load stress of the plate material (the sandwiched material) is processed and formed so that it does not come off or tilt, so it is a device that is not only durable but also versatile.

However, the present invention is constructed to improve the desired quality, and as will be explained with reference to the attached four drawings, the bolt (1
) is a shaft with a bolt head (2), a space (4) is provided on its lower surface (3), a ring-shaped washer (5) is fitted, and an overhanging edge (6) is attached to the outer periphery of the lower end of the bolt head (2). The washer (5) is formed into a raised annular shape, and the washer (5) is attached to the bolt head (2).
The distance (4) between the upper surface (3) and the overhanging edge (6) is a downward movement white space.

Therefore, in processing and forming the port 1- of the present invention, before carving the spiral (7) on the outer periphery of the 1-socket and simultaneously processing and forming the overhanging edge (6), the washers (5) are inserted at intervals (4). )
Next, a special thread cutting die is used to form a protruding blade on one side that is higher than the screw 111, and at the same time the thread cutting die is used to carve a spiral shape (7), the protruding blade is attached to the overhanging edge. This is a one-time construction method in which (6) is processed and formed into a convex raised shape along the outer periphery.

Since the present invention has the detailed structure, as shown in FIG. The bottom surface (3), where the thickness of (8) is different! : It can be firmly tightened with the upper surface of the washer (5), and even if a large stress is applied to the washer (5) when tightened, it is sufficiently supported and will not come off or tilt.

Then, by rotating the bolt, the clamped plate material (8) can be slid as it moves toward the port 1.

In this way, the plate material (
In addition to being able to insert and hold and tighten members to be tightened such as 8), it is also possible to tighten members that can be inserted into the overhanging green (6) between the bottom surface of the washer (5) and the spiral thread (5). It is something that can be done.

In particular, the present invention provides a washer (5) fitted into the main shaft of the bolt (1) that is connected to the lower surface (3) of the bolt head (2) and the overhanging green (
When the washer (5) is removed by sliding downward 1-1 between 6) and 1-1, the washer (5) is also removed from the tightening surface.

Therefore, even if the washer (5) is stuck to the tightening surface due to rust, scratches, etc., there is no need to remove it.

Furthermore, since the washer (5) is raised above the tightening surface and the bolt can be tightened easily, the workability is extremely good.

In this way, the present invention is suitable for a variety of uses, and the production method is also a technological innovation of a simple batch processing method.The new technology can greatly reduce work efficiency, costs, and labor, and can be produced at a low cost. Although the cost has been significantly reduced, the functional washer-equipped pole 1-1, which has an outstanding strong effect, is a great invention that will contribute to this field.

[Brief explanation of the drawing]

FIG. 1 shows +1 of Pol I~ with a washer according to the present invention.
1. Surface diagram. FIG. 2 is a front view of the washer-equipped pole according to the same item 1. FIG. 3 is a bottom view of the same. FIG. 4 is a partially cutaway central longitudinal cross-sectional view showing the bolt body and washer taken along line AA'. FIG. 5 is a front view showing an example of the operation of inserting and tightening the plate material (including the member to be tightened), showing the main parts. FIG. 6 is a partially cutaway front view of an embodiment of a well-known bolt with a washer, in which a plurality of protrusions are formed on the outer periphery of a stopper restraint. Fig. 7 shows a stopper retainer 11-, which is a bolt with a washer and has an annular paint layer attached to its outer periphery, according to the same well-known technique.
A partially cutaway front view showing the front view.

Claims (1)

[Scope of Claims] 1. A bolt with a washer, in which a washer is fitted at a distance above the main axis of the bolt, and an overhanging edge related to a convex annular shape is provided at the lower end of the bolt. 2. The bolt (1) is a main shaft, has a bolt head (2), has a space (4) on its lower surface (3), fits a washer (5), and has an overhanging edge (6) at its lower end around the outer periphery. The washer-equipped bolt according to claim 1, wherein the washer-equipped bolt is formed with a convex annular protuberance along the length thereof and is also provided with a spiral thread (7).