JPS5814204Y2 - crescent tablet - Google Patents

Description

[Detailed description of the invention] This invention relates to a crescent lock in which a crescent is pivoted to a base.

In conventional crescent locks, the shaft integrated with the crescent is a stepped shaft with a small diameter tip, a cover and washer are fitted to the tip, and the conical hole at the tip of the shaft is crimped to enlarge it. There is also known a device in which a flat portion is formed on a part of the contact surface between the shaft and the washer so that the washer rotates integrally with the shaft (see Japanese Utility Model Publication No. 1516/1983).
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However, with this crescent lock, when the tip of the shaft is crimped, there is a risk that the washer may come into pressure contact with the cover, and even if it does not come into contact with it, it tends to come into sliding contact.Furthermore, since the washer rotates with the shaft, there is a gap between the cover and the washer. Friction occurs, making it impossible for the crescent to rotate smoothly, and there is a risk that the crescent will not be able to withstand long-term use due to wear.

This idea was devised to solve the problems of previous installations, and its purpose was to make it possible to tighten the washer to the cover without pressing it, making it easier to assemble the crescent, and to make it easier to use. To provide a crescent lock capable of smoothly rotating a crescent without causing friction between a cover and a washer and durable for long-term use.

Hereinafter, this invention will be explained with reference to an embodiment shown in the drawings.A crescent 2 is attached to a box-shaped cast steel pedestal 1 that can be attached to interior fittings (not shown) so as to be able to slide and rotate freely. It is composed of a cast steel crescent main body 2A that is integrated during installation, and a substantially fan-shaped stainless steel engagement fitting 2B having a sliding engagement part.

For integration, a semicircular arc-shaped protrusion 3 is provided inside the crescent main body around the center of rotation on the back surface of the crescent main body at the base end 4 of the engagement fitting.
Furthermore, two protrusions 5 are provided spaced apart so that they can be fitted into through holes 6 provided in the proximal end portion 4 of the engagement fitting.

In order to attach the crescent 2 to the pedestal 1 in this manner, a shaft 8 is integrally provided at the center of rotation on the back of the crescent main body, and extends through the pedestal 1 and the stainless steel cover 7 inserted into the pedestal 1. A stainless steel washer 9 for preventing the cover from coming off is fitted into the pedestal 1, and a bulging flange 10 for preventing the washer from coming off is formed by caulking this at the tip of the shaft. Projections 11 are provided to support the cover 7 at its four corners so that it does not move.

A space 12 inside the pedestal is secured through these protrusions 11.
Wire springs 13 that pinch the shaft 8 from both sides are mounted inside the space using the protrusions, and a flat part 1 is provided in the inner shaft portion 14 so that these wire springs 13 come into contact.
5 is provided.

At the distal end of the inner part of the pedestal of the shaft 8, a large and small diameter mounting portion 16, 17 is formed on the distal end side, the diameter of which is gradually reduced to a small diameter in two stages,
The cover 7 is arranged on a large-diameter mounting portion 16 on the shaft end side, and the washer 9 is arranged on a small-diameter mounting portion 17 on the shaft tip side.

In this case, the washer 9 is rotatably regulated by the step 8 between the bulging collar 10 and the step 18 between the mounting portions 16 and 17, or is integrated under pressure, and the cover 7 is arranged so that it does not come into contact with the washer 1 between the washer 1, the space-inner shaft portion 14, and the stepped portion 19 between the mounting portion 16.

This device has the above structure, and when assembling by crimping later, the tip of the inside part of the pedestal of the shaft 8 is formed into two stages of large and small diameter mounting parts 16 and 17, so the washer 9 During crimping, the cover 7 does not come into contact with the stepped portion 18 and move toward the stem end side, and does not come into pressure contact with the cover 7. Therefore, there is no need to pay attention to the pressure contact with the cover 7, and assembly can be simplified.

When in use, friction occurs between the cover 7 and the washer 9, so no wear occurs, and the cover 7 is easy to rotate relative to the cover 7, so it can withstand long-term use and can be rotated smoothly during use.

Furthermore, if the crescent 2 is composed of a crescent main body 2A and an engaging metal fitting 2B, and the engaging metal fitting 2B is made of stainless steel, etc., sufficient strength and smooth sliding rotation can be obtained even if the crescent is made of cast steel. , can further enhance the effects in use.

As described above, this invention is extremely useful in practice.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of an embodiment of this invention before assembly, and FIG. 2 is a longitudinal cross-sectional view of the assembled state. 1...Pedestal, 2...Crescent, 2A
... Crescent body, 2B ... Holding tool, 3 ... Projection, 4 ... Engagement tool base end, 5 ...・Protrusion, 6...Through hole, 7...
...Cover 8...Shaft, 9...Washer, 10...Bulging collar, 11...Protrusion, 1
2...Space, 13...Wire spring, 14...Shaft portion in space, 15...Plane portion, 16.17... Mounting part, 18°19...
...Danbe.

Claims (3)

[Scope of utility model registration request] (1) In order to attach the crescent 2 to the box-shaped pedestal 1 in a slidable and rotatable manner, a shaft 8 that passes through the pedestal 1 and the cover 7 inserted inside it is provided integrally with the talescent 2, and the tip of this shaft 8 is attached to the shaft 8. In a crescent lock in which a washer 9 for holding the cover is fitted and the tip of the shaft is crimped to form a bulging flange 10 for preventing the washer from slipping out, the tip of the inside portion of the base 1 of the shaft 8 is provided on the tip side. By forming mounting portions 16 and 17 that reduce in diameter in two stages, a stepped portion 18 is formed between the large diameter mounting portion 16 and the small diameter mounting portion 17, and the washer 9 is attached to the small diameter portion at the tip of the shaft 8. The cover is placed on the distal end mounting portion 17 of the shaft to restrict the movement of the washer 9 with a stepped portion 18.
A crescent lock characterized by being arranged in. (2) The crescent according to claim 1 of the utility model registration claim, characterized in that the washer 9 is rotatable between the stepped portions 18 and 19 between the mounting portions 16 and 17 and the bulging collar 10. Tablet. (3) The washer 9 is integrally formed by being pressed between the stepped portions 18, 19 of the mounting portion 16, 17 and the bulging flange 10. Claim 1 of the Utility Model Registration Claim Crescent tablet.