JPS6217417A - Fastening auxiliary tool for flexible pt screw - 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 (Industrial Field of Application) This invention is applied to the tightening of PT wood screws that are processed and utilized using relatively soft materials such as resin materials.

By considering the setting of the tightening limit contact point and the additional setting of the loosening prevention effect, we aim to establish the usability when using PT wood screws as the resin material and to provide its practicality.

(Conventional Technique #t) PT wood screws, which are currently the most widely used pipe screws, were originally designed and used for metal fastening. However, in place of metals, the demand for PT wood screws for connecting soft materials such as resins has been increasing in recent years, and sufficient consideration must be given to its adaptation. I think it's obvious that this is necessary.

This is due to the fateful softness of resin materials, etc.
The screw tightening torque cannot be established, and most of the screws end up being over-tightened, which ultimately damages the screw mold and makes it impossible to reuse it.Furthermore, even if the screws are tightened properly, they are always over-tightened. This may also lead to loosening and leakage phenomena.

(Means for solving the problem, example) As mentioned above, the inherent problem with PT screw connections that deal with soft materials is the insensitivity to tightening torque due to the soft material. , this basic solution can be considered as follows.

E) Setting the stopper structure when tightening the p”r screw to the maximum.

) Setting of a loosening auxiliary mechanism that does not rely only on PT wood screws.

I believe that we must base our thinking on the above two points.

If you use PT wood screws, which are used in Toni-Kaku conventional metal systems, you can still use them even if you cut 'r31 due to the tactile feel for tightening them! ) There is no way it can be done.

Therefore, to explain the present invention with reference to separate drawings, as shown in Fig. 1, let's use the present invention in which an elastic ring material (a) and a saucer-shaped intermediate ring (b) are made and screwed together in advance to ensure their integrity. As shown in Figure 2 of the explanatory diagram, one side (1") of the O-ring, which is the elastic ring material (A), is placed on the base of the male screw.
However, it makes low contact with the female mold's fastening surface (1), and the O-ring begins to collapse.

At this time, the 0 ring is designed so that its white crushing can be transferred to another effective part (a part with a loosening effect), and eventually the main body, the saucer-shaped intermediate ring (B), is tightened. Finish tightening the female mold to the fastening surface (1) at the surface (1') (3rd
In this case, the role of the elastic ring material (a) is to predict the torque feeling just before tightening, and after the tightening is finished, the rubber material (tl) has an anti-slip effect. This is intended to achieve a synergistic effect with the locking mechanism, and furthermore, the escape area for crushing the O-ring mentioned above is transferred to its inner diameter (d), and it also has an auxiliary effect as a locking mechanism and a seal in case of an emergency. It is intended to play a supporting role.

As explained above, this is integrated with the 0 ring. The replacement type intermediate ring is designed to serve as an intermediate stopper when screwing soft PT wood, to prevent loosening, and to assist in sealing.

In connection with PT wood screw fastening using the present invention, the setting of the thickness of the saucer-type intermediate ring (B) is a very important point in use. Since there is no need to worry about over-tightening the screws, the thickness of the saucer-shaped intermediate ring (B) should be set at the interval (usually) that is scheduled for completion of proper tightening of the PT wood screws. The distance between (1) and (2) shown in the attached Figure 4)
The present invention is prepared with a slight twist (minus 1), and is used in such a way that it is used in the middle and securely fastens both sides.

(Effects of the invention) As explained below, by setting the intermediate ring, it becomes easier to set the torque by properly tightening the ring, and at the same time it is useful for preventing loosening, which is a major drawback of resin PT. For the first time, it is possible to establish a safe and reliable PT wood screw connection for resin by using conventional PT wood screws for metal.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the present invention, in which (a) is an elastic ring material, (b) is a saucer-shaped intermediate ring material, and (d) is its inner diameter. 2 to 4 are explanatory diagrams necessary for the operation of the present invention. (1) is the side surface of the female side, (2) is the side surface of the thread base on the male side, (1') is the fastening surface of the saucer-shaped intermediate ring, (1'')
is the fastening surface of the elastic ring material, (A) is the female side, and (B
) is the male side. ]] Patent applicant Hiroshi Sugihara

Claims (1)

[Claims] It is composed of an elastic ring material (a) and a saucer-shaped intermediate ring (b), both of which have the necessary contents of approximate values, and one side of the saucer-shaped intermediate ring (b) has a It is shaped like a saucer. A fastening aid for soft PT screws, characterized by having this set structure.