JPS644859Y2 - - Google Patents

Description

Detailed Description of the Invention <Industrial Field of Application> This invention relates to a cam shedding device for raising and lowering the heald frame of a loom.

<Prior Art> In general, a cam shedding device for raising and lowering a heald frame of a loom, as shown in FIG. The signal is transmitted to the gear 13 which has been moved. When the plate cam 14 fixed to the cam shaft 12 rotates, the opening lever 15, which pivotally supports the cam roller 16 which is in constant contact with the plate cam 14, swings left and right about the opening lever shaft 17. Further, the rope 18 connected to the opening lever 15 is connected to a heald frame 20 via a guide roller 19, and the heald frame 20 is connected to a spring 2 suspended from the machine frame (not shown).
1 and 21, it is configured to be raised and lowered by the swinging of the opening lever 15.

<Problems to be solved by the invention> However, as mentioned above, the cam shedding device itself, in which the drive shaft is arranged independently, becomes large in size, making it necessary to reduce the number of looms that can be arranged in a given floor area. As a result, there was a demand for miniaturization.

<Means for solving the problem> This invention was made in view of the above, and its characteristics are that the opening lever shaft and the cam shaft are arranged in parallel, and the first gear and the camshaft are fixed to the opening lever shaft. The rotation of the second gear is transmitted to the first reduction gear and the second reduction gear with a plate cam loosely fitted to the camshaft, and the opening lever loosely fitted to the opening lever shaft is swung by the plate cam. It is what it is.

<Example> In the cam opening device shown in FIGS. 1 and 2, 1,
1 is the first gear (hereinafter referred to as the selvage gear), 1, 2
is a second gear (hereinafter referred to as a weaving gear), which is wedged to both ends of the opening lever shaft 7 disposed in the case C. 2 is a cam shaft disposed in the case C parallel to the opening lever shaft 7. 3, 1 is the ear weaving gear 1,
The first reduction gear 3 and 2 mesh with the weaving gears 1 and 2, and the second reduction gears 3 and 2 mesh with the ground weaving gears 1 and 2, both of which are loosely fitted onto the camshaft 2. 4, 1...4, n are a plurality of plate cams having a common maximum radius and minimum radius, and boss extensions 3, 11, 3, 21 formed on the first and second reduction gears 3, 1, 3, 2. It is fixed to the heald frame 20 in a manner that corresponds to the opening amount of the heald frame 20. 5, 1...5,
An opening lever n is loosely fitted to the opening lever shaft 7 so as to correspond to the plate cams 4, 1...4, n.
Cam rollers 6, 1...6, n are pivotally supported at one end of each opening lever 5, 1...5, n, and are always in contact with the plate cams 4, 1... 4, n, respectively, by elastic means (not shown). 18, 1 . . . 18, n are ropes connected to the other ends of the respective opening levers 5, 1 . The opening lever shaft 7 having a bevel gear G fixed to one end thereof is driven from the loom side.

Note that the camshaft 2 may be loosely fitted into the case C or may be fixed.

As a result, the rotation of the opening lever shaft 7 driven from the loom side is simultaneously from the selvedge weaving gears 1, 1 to the first reduction gears 3, 1, and from the ground weaving gears 1, 2 to the second reduction gears 3, 2, respectively. communicated. As a result, when the plate cams 4, 1...4, n rotate, the opening levers 5, 1 pivotally support the cam rollers 6, 1... 6, n, which are always in contact with the plate cams 4, 1... 4, n.
...5, n swings left and right around the opening lever shaft 7. The heald frame 20 is raised and lowered via the rope 18 by the swinging of each opening lever 5, 1...5, n.

<Effects of the invention> As explained above, the cam opening device according to this invention has a first and second reduction gear with a plate cam that is loosely fitted to the cam shaft using the selvedge weaving gear and the ground weaving gear fixed to the opening lever shaft. Since the gears are driven, there is no need for a drive shaft as seen in conventional examples. Therefore, since the case of the cam shedding device can be downsized, the number of looms that can be arranged on a given floor area can be considerably increased.

[Brief explanation of drawings]

1 and 2 show an embodiment of this invention, FIG. 1 is a schematic explanatory diagram thereof, FIG. 2 is a partially sectional plan view, and FIG. 3 is a schematic explanatory diagram of a conventional example. 1, 1... 1st gear (ear weaving gear), 1, 2...
...Second gear (weaving gear), 3,1...First reduction gear, 3,2...Second reduction gear, 4...Plate cam,
5... Opening lever, 7... Opening lever shaft, 20...
...Heald frame, C...case.

Claims (1)

[Scope of utility model registration request] A cam shedding device for raising and lowering a heald frame via shedding levers, wherein a shedding lever shaft driven from the loom side and a cam shaft are disposed in parallel to the case, and a plurality of shedding levers are loosely fitted into the case. a first gear and a second gear are fixed to the opening lever shaft, and a first reduction gear and a second reduction gear, each of which has a plurality of plate cams corresponding to the opening lever fixed to the cam shaft, are loosely fitted;
A cam opening device for a loom, comprising a configuration in which the first gear and the second gear rotate the first and second reduction gears.