JPS632459Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a warp shedding device for a circular loom.

As shown in Fig. 1, which is a side view of the warp thread shedding device, a circular loom is equipped with a cam drum 2 mounted on a main shaft 1 disposed in the center of the circular loom, and a number of cam drums 2 are arranged in concentric circular strips around the periphery. The warp thread shedding heald frames A, 3a, B, 3b are alternately raised and lowered by the cam drum 2. A cam lever is interposed between the cam drum 2 and the heald frames A and B. Conventionally, in order to move the heald frames A and B up and down, two cam grooves were provided in the cam drum 2, one end of which rolled or slid in the cam groove, a fulcrum in the middle, and the other end of the heald frames A and B. A mechanism was adopted in which the heald frame for warp thread shedding was moved up and down alternately using two cam levers connected to each other. With this structure, the cam levers are individually connected to each heald frame, which requires a large space, and the cam drum must also be thick, making it difficult to assemble and maintain the work. had bad drawbacks.

This invention consists of a cam drum with only one cam strip, a lever A between the cam strip and the heald frame A, and a gear A with its intermediate portion as a supporting shaft, and a gear B meshing with gear A as a supporting shaft. Therefore, the above-mentioned drawbacks of the prior art were solved by creating a structure in which the lever B is connected to the heald frame B.

Hereinafter, a detailed description will be given based on exemplary drawings.

FIG. 2 is a plan view of the lever portion, and FIG. 3 is a side view. As shown in Fig. 1, in the circular loom, a shuttle 4 is supported on the outer circumferential side of a circular reed 7 consisting of a number of slits provided between an upper gate ring 5 and a lower gate ring 6, on which the shuttle 4 moves in circular motion. The warp heddle is opened by wire healds A, 9a and wire healds B, 9b, through which a large number of warp threads 8 are inserted, which move vertically. A large number of wire healds A and B are the heald frames A and B described above.
3a and B, 3b are stretched by heald hangers A, 10a and heald hangers B, 10b. As the heald frames A and B move up and down, the wire healds A and B also move up and down.

The lower ends of the heald frames A, 3a are connected to levers A, 12a via rotational connection blocks 11a. Almost the middle side of lever A, 12a is shaft 13
A roller 14 is provided at the other end of the lever A, 12a, and it rolls or slides in the groove of the cam strip 15 and is rotated by lever action. The rotation block 11a side is moved up and down. What is characteristic here is that only one cam strip is provided on the cam drum 2. In order to rotate the lever B, 12b, a gear B, 16b is provided at its end, and the gear B, 16b meshes with the gear A, 16a coaxially fixed to the lever A, 12a. Then lever A, 1
2a rotates and the connecting block 11a side goes down,
The levers B and 12b are rotated in the opposite direction, and the connecting block 11b side is lowered. This allows the heald frames A and B to alternately move up and down to open the warp threads. The same applies to gears A and B, which are sector gears.

When the warp thread shedding device in a circular loom is structured as described above, the cam drum can be made thinner than the conventional one, and there is no need to provide individual cam levers. This improves workability from the viewpoint of maintenance, and even when the gears are worn out, the gears can be used for a long period of time by changing the combination position of the pair of gears. Furthermore, the effect of reducing noise during operation has also been obtained.

[Brief explanation of the drawing]

FIG. 1 is a side view of a warp thread shedding device for a circular loom, FIG. 2 is an enlarged plan view of a lever portion, and FIG. 3 is a side view of the same. 1... Main shaft, 2... Cam drum, 3a... Heald frame A, 3b... Heald frame B, 4...
...Shuttle, 8...Warp thread, 9a...Wire heald A, 9b...Wire heald B, 10a...Heald hanger A, 10b...Heald hanger B, 1
1a, 11b... Rotating connection block, 12a...
Lever A, 12b...Lever B, 14...Kolo,
15...Cam strip, 16a...Gear A, 16b...
...Gear B.

Claims (1)

[Scope of utility model registration request] In a circular loom having a structure in which a cam lever is used to connect a cam drum which is rotated by a main shaft at the center of the loom and a number of warp thread shedding heald frames A and B which are erected on the outer periphery of the cam drum and move up and down alternately, a cam strip is attached to the cam drum. Only one strip is provided, and the lever A connecting the cam strip and the heald frame A is provided with a gear A with its intermediate portion as a pivot, and is connected to the heald frame B with a lever B using a gear B meshing with the gear A as a pivot. Warp thread shedding device for circular looms.