JP2500321Y2 - Chain connector - Google Patents

Description

[Detailed description of the device]

[0001]

[Industrial field of application] This invention is a chain connector (ch
ain connector or link).

[0002]

U.S. copending application Ser. No. 07 / 680,905, filed April 5, 1991, describes novel links for connecting chains, each of which is a secondary link. Two terminal links with internal chain plates
k) consisting of a number of conventional links.
The novel link has a first outer chain plate, two pins, and a second outer chain plate. The first outer chain plate has two circular holes. Each pin has an enlarged flat head at its first end and a flat head at its second end, and a groove extends near the flat head at the second end to form a neck. ing. The second outer chain plate has two holes, each of which consists of a relatively large semi-circular hole that partially overlaps a relatively small semi-circular hole. The distance between the centers of the relatively large semi-circular holes is less than the distance between the pins, while the distance between the centers of the relatively small semi-circular holes is the same as the distance between the pins.

To assemble a chain, (a) the flat head of each pin is passed through the circular hole of the first outer chain plate and the inner chain plate of each terminal link of the chain, and (b) the first outer chain plate is bent. , Moving the flat heads of the pins towards each other so that each flat head penetrates each relatively large semi-circular hole, (c) releasing the first outer chain plate from bending, thereby causing each neck to each relatively smaller Accept in a semi-circular hole.

In practical use, the chain will be tense and it will be necessary to receive each neck in each of the relatively small semi-circular holes, thus resulting in a rigid connection of the chain.

US copending application Ser. No. 07 / 816,429, filed December 31, 1991, describes a chain of links as set forth in above Ser. No. 07 / 680,905. Therefore, it is possible to separate each link from the chain without using any tools, so that the length of the chain can be easily adjusted.

[0006]

However, the main problem in the above application is that it is difficult to bend the outer chain plate to move the flat heads of the pins toward each other, and at the same time, place the outer chain plate in place. It is difficult to maintain.

[0007]

In order to solve the above problems, the link of the present invention comprises a first outer chain plate and a first outer chain plate.
It has a pin, a second pin, and a second outer chain plate.
The first outer chain plate has two circular holes. The pin has an enlarged flat head at its first end and a dome-shaped flat head at its second end, in the vicinity of which the groove extends to form a neck. The second outer chain plate has a double circular hole consisting of circular holes having two different diameters and an inner surface having a relatively small semi-circular hole partially overlapping the outer circular hole and a relatively large semi-circular hole. It has a double hole consisting of a small-diameter 8-shaped hole.

In the factory, the first pin is (a) penetrated through the holes of the first outer chain plate, the holes of the two inner chain plates, and the holes of the second outer chain plate, and (b) rivets with both flat heads. Secure and secure the chain components in the conventional manner. Then, the second pin is passed through another hole of the first outer chain plate to fix the enlarged flat head of the second pin to the first outer chain plate.

[0009] Retailers and bicycle / motorcycle users use (a) the dome-shaped head of the second pin through the hole of another two inner chain plates, and (b) the dome-shaped head. Moving towards each other, inserting the dome-shaped head of the second pin into a relatively large semi-circle, (c) releasing the second pin from bending and receiving the neck in a relatively small semi-circular hole. To

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT In FIG. 1, a link 2 comprises a first outer chain plate 4 having two circular holes 6, an enlarged flat head 10 at the first end (see FIG. 2) and a second end at the second end, respectively. Are two pins 8 having a neck 12 connected to the entire dome-shaped head 14, a double circular hole 18 having a large diameter circular hole on the outer surface and a small diameter circular hole on the inner surface, and a large diameter circular hole and an inner surface hole on the outer surface. A second outer chain plate 16 consisting of a relatively small semi-circular hole and a double hole 20 consisting of a figure 8 hole consisting of a relatively large hole that partially overlaps. The enlarged flat head 10 is larger than the hole 6, the neck 12 is smaller than the dome-shaped head 14, and the dome-shaped head 14 is slightly larger than the hole 6. The relatively large semi-circular hole is slightly larger than the dome-shaped head 14. The domed head 14 is larger than a relatively small semi-circular hole. The relatively small semi-circular hole is slightly larger than the neck 12. The relatively large semi-circular hole is closer in size to the hole 18 than the relatively small semi-circular hole.

In FIG. 2 showing a link manufactured in a factory, each pin 8 is penetrated into each hole 6 and an enlarged flat head 10 is formed.
Are riveted so that each pin 8 is fixed to the outer chain plate 4. One dome-shaped head 14 of the pin 8 is (a) penetrated by the two inner chain plates of the terminal links of the chain, (b) pushed into the double circular hole 18 and (c) fixed with rivets.

As a result, the inner chain plate, the outer chain plates 4 and 16 and the pin 8 are connected. Generally, chains are manufactured in the above-mentioned range at the factory and sold to retailers, which are now sold to bicycles and motorcycle riders. It should be noted that the inner chain plate and the outer chain plates 4, 16 are connected in a conventional manner, so that the pins inserted in the double circular holes 18 can be replaced by conventional pins.

In FIG. 3, the outer chain plate 16
Is swiveled to a point at which the domed head 14 of another pin 8 passes through the two inner chain plates of another terminal link of the chain.

In FIG. 4, the outer chain plate 4
However, it is slightly bent, which causes the domed heads 14 of the pins 8 to move closer to each other. Dome head 1
4 is passed through a relatively large semi-circular hole of figure 8.

In FIG. 5, the bending force of the outer chain plate 4 is released so that the pins 8 tend to be parallel to each other due to the restoring force of the outer chain plate 4. The neck 12 is received in a relatively small semi-circular hole of figure eight. In use, the chain is tensioned and a force is exerted to keep the pins 8 apart from each other, so that the neck 12 of one pin 8 is firmly received in the relatively small semi-circular hole of the figure eight hole. Since the dome head 14 is larger than the relatively small semi-circular hole of the figure eight hole, the dome head 14 is
There is no deviation from it. That is, the chains are firmly connected.

Although the present invention has been described in relation to the preferred embodiments above, those skilled in the art upon reading this specification will appreciate the variations. Therefore, the invention extends to all modifications within the scope of the appended claims.

[0017]

As described above, according to the present invention, since the double circular hole is formed in one of the second outer chain plates, the first pin has a sufficient margin to move in the double circular hole. Above, since the diameter of the small diameter circular hole of the double circular hole is smaller than the diameter of the dome-shaped head of the first pin, it is possible to properly limit the floating width of the first pin and disengage the second outer chain plate from the first pin. Can be difficult.

Further, a double hole having a large-diameter circular hole on the outer surface and a small-diameter 8-shaped hole on the inner surface is formed on the other side of the second outer chain plate.
There is enough room to move in the heavy hole, and the diameter of the relatively large semi-circular hole of the small diameter 8 shaped hole is larger than the diameter of the dome head of the second pin. Can be disengaged from the V-shaped hole, but due to the restriction of the double circular hole on the first pin, the second outer chain plate can
It is prevented from coming off the pin, and the bending tolerance of the chain is greatly improved.

Further, since the diameter of the dome-shaped head of the second pin is smaller than the relatively large semicircular hole of the small diameter 8 shaped hole, the second pin can be easily inserted into the small diameter 8 shaped hole for work. Since the diameter of the dome-shaped head of the second pin is larger than the relatively small semicircular hole of the small diameter 8 shaped hole, the second pin is prevented from coming off from the small diameter 8 shaped hole. It can be carried out.

[Brief description of drawings]

FIG. 1 is an exploded view of a link for connecting chains according to the present invention.

FIG. 2 is a partial sectional view of a link for connecting chains according to the present invention.

FIG. 3 is a plan view of a link before connecting two terminal links of the chain according to the present invention.

FIG. 4 is a partial cross-sectional view of a chain when two terminal links of a chain according to the present invention are connected.

FIG. 5 is a partial cross-sectional view of a link after connecting two terminal links of a chain according to the present invention.

[Explanation of symbols]

 2 link 4 1st outer chain plate 6 circular hole 8 pin 10 flat head 12 neck 14 dome head 16 second outer chain plate 18 double circular hole 20 double hole

Claims (5)

(57) [Scope of utility model registration request] 1. A first outer chain plate having a first circular hole and a second circular hole, a double circular hole consisting of a large diameter circular hole on the outer surface and a small diameter circular hole on the inner surface, and a large diameter circular shape on the outer surface. It has a hole and a small-diameter 8-shaped hole on the inner surface, and the small-diameter 8-shaped hole has a relatively small semi-circular hole far from the double circular hole and partially overlaps with this semi-circular hole. A second outer chain plate having a relatively large semi-circular hole, a first circular hole of the first outer chain plate, two inner chain plate holes of the first end link of the chain, and a second outer It penetrates through the circular hole of the chain plate and is riveted at its two ends, thereby connecting the first outer chain plate, the inner chain plate of the first terminal link of the chain and the second outer chain plate. A second pin having a first pin and an enlarged flat head at the first end and a dome-shaped head at the second end, the groove being formed near the dome-shaped head to form a neck A dome-shaped head of the second pin with the second hole of the first outer chain plate,
Penetrating through the holes in the two inner chain plates of the second terminal link of the chain and the relatively large semi-circular holes of the figure eight holes of the second outer chain plate, whereby the neck is 2 A chain connector for connecting two terminal links of a chain, characterized by comprising a second pin, which is received in a relatively small semi-circular hole of the outer chain plate. 2. The distance between the center of the relatively large semi-circular hole of the second outer chain plate and the center of the circular hole is the center of the relatively small semi-circular hole of the second outer chain plate and the center of the circular hole. The chain connector according to claim 1, wherein the chain connector is smaller than a distance from the chain connector. 3. The distance between the relatively small semi-circular hole of the second outer chain plate and the circular hole is equal to the distance between the centers of the circular holes of the first outer chain plate. The listed chain connector. 4. The chain connector according to claim 1, wherein the first pin is a conventional chain pin. 5. The first pin has an enlarged flat head at a first end, and a second end having a dome-shaped head having a groove extending in the vicinity thereof to form a neck. The chain connector according to claim 1, wherein the chain connector is a chain connector.