JPS6325411Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a connection device for a ball chain, in which a connection device for connecting to other members is attached to a ball chain in which balls are connected to each other by a connecting rod.

Prior Art This type of connection device has a U-shape formed by a pair of legs connected to each other at one end, an opening between both legs, and a hemispherical shape with an opening inside at the other end of both legs. Using connectors each formed with a recess,
A connection device has been proposed in which the ball at the end of the ball chain is positioned in the opening and the opening between the legs is narrowed to hold the ball in the recess (Utility Model Application No. 50-112852). issue).

However, although this connection device makes it easy to attach the connector to the ball chain, if a strong tensile force is applied between the connector and the ball chain, the legs will open and the connector will come off the ball chain. There is a drawback.

Purpose of the invention The purpose of the invention is to provide a ball chain connecting device that facilitates the work of connecting a connecting tool to a ball chain and that does not cause the connecting tool to come off from the ball chain even when a strong tensile force is applied. shall be.

According to the present invention, the above-mentioned object is achieved by using a connecting device in which a ball storage portion is formed between a pair of legs connected to each other at one end, and the other end of each leg projects toward the other side. Each protruding piece is formed, and a notch is formed in each protruding piece from the tip side to hold the ball at the end of the ball chain in the ball storage portion, and a connecting rod is engaged with each notch, and each protruding piece is The connecting device can be attached to the ball chain by simply placing the legs together between the balls and narrowing the distance between the legs of the connecting device, and when a strong tensile force is applied, the protruding pieces and/or the protruding pieces contact the balls. This is achieved by preventing the deformation of the protruding piece by holding it in place so that the connecting tool does not come off.

Embodiments Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

In FIG. 1, reference numeral 1 denotes a ball chain in which a plurality of balls 2 are successively connected by a connecting rod 3, and a connecting tool 10 is attached to one end of the ball chain.

As shown in FIG. 2, the connector 10 has a pair of legs 11 and 12 whose one ends are connected to each other, and the other ends of the legs 11 and 12 are bent inward and protrude toward the other side. It is divided into pieces 13 and 14, and the leg 1
1 and 12 and the protruding pieces 13 and 14 serves as a ball storage section 15 for storing the balls 2 at the ends of the ball chain 1.
Each protruding piece 13, 14 has a cut 1 from the tip side.
6 and 17 are formed. The wall thickness t of the legs 11, 12 and the protruding pieces 16, 17 of this connector 10 is the same, and in the illustrated example, if the interval between the balls 2 of the ball chain 1 is T, then t<T/2. There is.

In the connecting tool 10, with the legs 11 and 12 spread apart as shown in FIG. Mounting on the ball chain 1 is easy by simply narrowing the legs 11 and 12 while positioned in the notch 16. When the connecting tool 10 is attached to the ball chain 1, the balls 2 at the ends of the ball chain 1 are attached to the legs 11, 12 of the connecting tool 10 and the protruding pieces 13, 14.
The connecting rod 3 is held in the ball storage part 15 by the connecting rod 3 and is engaged with the notches 16 and 17, and the protruding pieces 13 and 14 of the connecting tool 10 are overlapped between the balls. Therefore,
When a strong tensile force is applied between the ball chain 1 and the connector 10, the upper surface of the upper protruding piece 13 comes into contact with the ball at the end, as shown in FIG. 3, and the protruding piece 1
The protruding pieces 13 and 14 are only deformed so that the lower surface of the tip of the protruding piece 14 is in contact with the upper surface of the protruding piece 14 located below, and the lower surface of the protruding piece 14 is in contact with the next ball, and the legs 11 and 12 are There is no risk that the connecting tool 10 will not spread and come off from the ball chain 1.

The connecting device shown in FIG. 4 is constructed in the same manner as the connecting device shown in FIG. 1, except that the connecting tool 20 and the protruding pieces 23, 24 are curved in a waveform as shown in FIG. Therefore, this connecting device has projecting pieces 23, 2
4 is curved in a wave shape, so the protruding pieces 23 and 24
Legs 21 and 22 that are engaged and have a strong tensile force
This has the advantage of more reliably preventing opening. In addition,
In Figures 4 and 5, 25 is a ball storage section;
6 and 27 are notches.

The connecting device shown in FIG.
The structure is the same as that of the connecting device shown in Fig. 1, except that a ball chain 1' is used in which the distance T between the balls is t = T/2 for the wall thickness t of the protruding pieces 1 and 12 and the protruding pieces 16 and 17. has been done.

Therefore, in this connection device, when the connection device 10 is connected to the ball chain 1', the connection device 10
The upper surface of the protruding piece 13 located on the upper side contacts the upper ball 2, and the lower surface of the protruding piece 14 located on the lower side contacts the lower ball 2, so even if a strong tensile force is applied, the protruding piece 13 , 14 are not deformed and the leg 1
1 and 12 can be more reliably prevented from opening.

Effects of the invention As described above, in the present invention, the notch formed in the protruding piece engages the connecting rod of the ball chain, and the protruding pieces overlap between the balls, so that tensile force is applied to the connecting tool and the ball chain. Even if a force is applied, the protruding piece only contacts the adjacent ball, the legs of the connecting tool do not spread, and there is no fear that the connecting tool will come off the ball chain. Furthermore, since the connector can be attached to the ball chain simply by narrowing the distance between the legs, the attachment operation is extremely simple. Furthermore, since the connector can be manufactured by press working, it is inexpensive.

[Brief explanation of drawings]

1 is a front view showing a first embodiment of the connecting device according to the present invention, FIG. 2 is a perspective view showing an example of a connecting tool used in the connecting device, and FIG. 3 is an explanatory diagram of the operation of the connecting device, FIG. 4 is a front view showing a second embodiment of the connecting device, FIG. 5 is a perspective view showing an example of a connecting tool used in the connecting device of FIG. 4, and FIG. 6 is a third embodiment of the connecting device.
It is a front view showing an example. 1, 1': Ball chain, 2: Ball, 3:
Connecting rod, 10, 20: Connection tool, 11, 12, 2
1, 22: Leg portion, 13, 14, 23, 24: Projecting piece, 15, 25: Ball storage portion, 16, 17, 2
6, 27: Notch.

Claims (1)

[Claims for Utility Model Registration] A pair of legs 11, 1 whose one ends are connected to each other
The ball storage portion 15 of the connection tool 10, 20 has a ball storage portion 15, 25 between 2, 21, 22,
In the ball chain connecting device in which the balls at the ends of the ball chains 1, 1' are held by the ends of the ball chains 1, 1', the connecting tools 10, 20 are connected to the legs 11, 1
The other ends of 2, 21, 22 each have protruding pieces 13, 14, 23, 24 that protrude toward the other side, and each protruding piece 13, 14, 23, 24 has a cut 16, 17, 26, 27 are formed, and the balls at the ends of the ball chains 1, 1' are held in the ball storage parts 15, 25, and the balls at the ends of the ball chains 1, 1' are held in the respective notches 16, 17, 26, 27. The connecting rods 10, 20 are engaged with each other, and each of the protruding pieces 13, 14, 23, 2
A ball chain connection device characterized in that 4 is polymerized between balls 2.