JPS5848383Y2 - loom shedding device - Google Patents

Description

[Detailed description of the invention] This invention relates to a shedding device for creating a shed in the warp thread group by moving the base frame of the heddle frame group up and down. By making the difference in vertical movement as small as possible, parts that move vertically will not wear unevenly even during high-speed operation, and the lifespan will be extended.
Another object of the present invention is to provide a shedding device for a loom that is downsized.

As a conventional shedding device, one is known in which a single rotating shaft is provided below a heald frame group in which a plurality of frames are arranged in a row, and a plate cam is provided on the shaft to individually move the base frame up and down.

In this type of device, the same number of plate cams as the heald frames are arranged on the rotating shaft, so if the thickness of each plate cam is made thinner, the length of the heald frame group can be shortened. Due to strength issues, there is a limit to the wall thickness, and it is impossible to shorten the length of the heald frame group, resulting in a large difference in vertical motion between the front frame and the last frame. .

As a result, the parts that move up and down, which have a large amount of momentum, are subject to severe fatigue, and the weaving operation cannot be carried out at high speeds due to the large amount of momentum.

The configuration based on this idea is that a pair of rotating shafts are provided parallel to each other on the left and right below the position where a group of multiple heald frames stacked vertically in a row is provided, and the same number of plates as the heald frames are arranged along both rotating shafts. The cams are arranged alternately on the left and right and opposite the heald frames, and each plate cam is provided with a driven part that moves up and down according to the rotation of the cam, and the tip of each driven part is connected to the row of each heald frame. The heald frame is extended in a staggered manner along the installation direction, and a rod for supporting the heald frame is provided upright at the tip of each of these driven parts.

Hereinafter, embodiments of this invention will be described with reference to the drawings.

This device is installed on a frame 1 that is aligned with the position of a heald frame group 10 that is provided by stacking a required number of heald frames 9 in a vertical direction in a loom, and a pair of rotating shafts are installed in the frame 1. 2, 2 are provided parallel to each other on the left and right sides of the heald frame group 10 as shown in FIG.

A drive shaft 3 is disposed between the two rotating shafts 2, 2, and the driving shaft 3 and both rotating shafts 2, 2 are connected by gears 4, 5.6, so that the two rotating shafts 2, 2 are reversed. It is designed to rotate in the direction.

Plate cams 7 are fitted to both rotating shafts 2, 2, respectively, and the total number of plate cams 7 on the left and right sides is the same as the number of heald frames in the heald frame group 10, and as shown in FIG. The cams 7 are arranged alternately and are provided facing the heald frame 9, respectively.

That is, each plate cam 7 of one rotating shaft 2 is provided opposite to every other heald frame 9 of the heald frame group 10.

As shown in FIGS. 1 and 2, each plate cam 7 is formed by an outer edge or groove formed by symmetrically arranging arcs of different sizes and radii and connecting both arcs with a smooth curve. Furthermore, when they are arranged in a row, they are formed so that the difference in height becomes larger in sequence than in one.

Each plate cam 7 is provided with a driven portion 11 that moves up and down in accordance with the rotation of the plate cam 7.

As shown in FIG.
The end of the lever 12, which is perpendicular to the rotation shaft 2.2 and opposite to the rotation shaft 2.2, is pivotally supported on the frame 1, and a trochanter 13 in contact with the plate cam 7 is attached to the intermediate part of the lever 12, so that the frame 1 and the lever A spunong 14 is interposed between the trochanter 12 and the trochanter 13 is pressed against the plate cam 7.

A rod 8 is connected upright on the frame 1 via a connector 15 to the free end side of each of the driven parts 11, and each rod 8
The heald frame 9 is supported in this case, and in this case, as shown in FIGS. This is shown in a cross-sectional view of the rod 8, which is extended in two rows on the left and right in a staggered manner.

In this case, if the ends of the left and right driven parts 11 are formed so as to be aligned directly above each other, and a rod with a required thickness and strength is provided at the ends, the distance between each heald frame 9 of the heald frame group 10 becomes large and it becomes impossible to achieve the intended purpose.

On the other hand, if thin rods are provided, the spacing between the heald frames 9 can be narrowed, but the rods are not durable and cannot withstand high speeds.

Therefore, each rod 8 supports every other heald frame 9 on one side, similar to the arrangement of each plate cam 7.

The effect of this device is that the same number of plate cams as the heald frames are arranged alternately on the left and right over the pair of rotating shafts provided on the left and right below the heald frame group, and the plate cams on one side are opposite to the heald frame. In this case, the plate cam will face every other heald frame in the heald frame group, and even if the spacing between the heald frames is sufficiently narrow, the plate cam on one side will face twice the spacing between the heald frames. Since they are arranged at intervals, a strong, wide and thick plate cam is used.

Therefore, the overall length of the heald frame group can be shortened, and the device can be made strong enough to withstand high-speed operation.

Furthermore, the tips of driven parts that are installed opposite to each plate cam and are moved up and down by the plate cams are extended in a staggered manner along the direction in which the heald frame group is arranged, and rods are erected at the tips of each of these driven parts. A heald frame is supported on each rod, and on one side where each rod is arranged in a row, every other heald frame is erected facing each other, so that the rods are thick enough to withstand the required strength. can be used, and the total length of the heald frame group can be shortened.

In addition, due to the arrangement and connection of the plate cam and the tip of the driven part mentioned above, each part constituting the driven part has the same shape and size on both the left and right sides, which of course makes it easy to procure and replace parts. The mechanism that converts rotational motion to vertical motion is simplified,
It is provided as a highly durable device that does not wear out unevenly.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of the shedding device of a loom according to this invention seen from the front, Fig. 2 is a cross-sectional view similarly seen from the side, and Fig. 3 is a plan view schematically showing the relationship between the plate cam and the heald frame. It is.

Claims (1)

[Scope of utility model registration request] Below a heald frame group 10 in which a plurality of heald frames 9 are arranged in a vertically overlapping manner, a pair of rotating shafts 2, 2 are arranged parallel to each other along the left and right sides of the arrangement direction of each heald frame 9. A plurality of plate cams 7 are arranged alternately on the left and right in the axial direction on both rotating shafts 2, 2, and are provided facing each heald frame 9, respectively.
A driven part 11 that moves up and down according to the rotation of the plate cam 7 is provided, and the tips of the left and right driven parts 11 extend in a staggered manner along the direction in which the heald frames 9 are arranged. A shedding device for a loom, characterized in that a rod 8 for supporting a heald frame 9 is provided upright at the tip of each driven portion 11.