JPH0790745A - Dobby loom - Google Patents

Abstract

PURPOSE:To obtain a loom of higher operational speed by using a thin band plate as a linear member for connecting it to a heald frame to prevent harmful vibrations concomitant with the vertical motion of the heald frame. CONSTITUTION:In a dobby loom, a flat bar 14 composed of two thin stainless steel band plates attached, using relevant members 24, to a jack lever 13 through a guide roller 16 revolvably set up on the upper face of the upper flange of the upper frame 15 of the loom corresponding to the center in the longer direction of a heald frame 2 is distributed left and right and fixedly connected, using the member 24, to left and right swingable lever members 19, respectively. Thereby, harmful vibrations such as jumpings in the vertically moving operation of the heald frame 2 can be suppressed, with the necessary weight of the system lighter than a wire of the same mechanical strength, and maintenance such as detaching and attaching can be facilitated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dobby machine.

[0002]

2. Description of the Related Art In general, a dobby machine, as shown in FIG.
It is installed on the frame 1 of the loom and is connected by a filament member 3 to a heald frame 2 for opening warp yarns.
One end of this linear member 3 is connected to a jack lever 5 which is an output part of the main body 4 of the dobby machine, and the other end thereof is a guide roller 6
And, it is connected to both ends of the heald frame 2 via the lever member 7. Then, by swinging the jack lever 5, the heald frame 2 which is biased downward by the spring 8 of the lever member 7 is pulled up to raise and lower the heald frame, and predetermined weaving is performed.

[0003]

By the way, as the connecting linear member 3, a wire having a relatively small diameter formed by a large number of twisted wires is used so as to withstand repeated bending deformation and high dynamic load. Was there. However, this wire has an elongation (about 1% with respect to the entire length) due to untwisting when the load becomes large, so that there is a problem that it vibrates (jumps) at the up-down vertical dead center of the heald frame 2. For this reason, raising and lowering speed (higher efficiency of weaving process)
It was an obstacle to my efforts.

Therefore, the present invention was devised to provide a dobby machine in which harmful vibration does not occur when the heald frame is moved up and down.

[0005]

SUMMARY OF THE INVENTION The present invention comprises a thin strip plate as a line member for connecting to a heald frame of a loom.

[0006]

With the above-mentioned structure, the belt-shaped plate transmits the driving force from the output portion of the dobby machine without stretching, and raises and lowers the heald frame.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an embodiment of a dobby machine according to the present invention. In this dobby machine, the main body 11 is installed on the gate-shaped frame 12 of the loom,
A thin strip-shaped plate (flat bar) 14 is provided between the jack lever 13 serving as an output portion and both ends of the heald frame 2 for appropriately transmitting and moving the swing to move up and down.

The upper frame 15 which constitutes the frame 12
A guide roller 16 is provided on the upper flange upper surface of the bracket 17 at a position corresponding to the longitudinal center of the heald frame 2.
The two strip-shaped plates 14 extending from the jack lever 13 are rotatably provided via the. A lever member 19 is swingably attached to the upper surfaces of the lower flanges on both the left and right sides of the upper frame 15 via a bracket 18. The lever member 19 has arms 21, 22, 23 extending in three directions from a swing point 20 of the bracket 18,
A mounting member 24 for rotatably mounting the strip plate 14, a bracket 26 for mounting one end of the spring 25, and a connection bar 27 for connecting to the heald frame 2 are sequentially provided at the tips of the arms 21 ... 23. Has been. The mounting member 24 is also provided at the swing end of the jack lever 13. The other end of the spring 25 is connected to the frame 1
The lever member 19 is attached to the side portion of the frame 2 via a bracket 28 and urges the lever member 19 in the direction in which the heald frame 2 descends. That is, when the jack lever 13 swings to pull the strip plate 14, the lever member 19 swings against the biasing force of the spring 25, and the connection bar 27
The heald frame 2 is raised via the.

As shown in FIGS. 2 and 3, the mounting member 24
Is a substantially rectangular parallelepiped hollow body, and has a hole 29 and a boss 30 for inserting a pin (not shown) serving as a rotation shaft at one end side, and holds the strip plate 14 at the other end side. Bolts 31 and blocks 32 and 33 are provided.
The blocks 32 and 33 are attached to the upper and lower inner wall surfaces of the attachment member 24 at a predetermined interval from each other, and form an insertion port for taking in the end portion of the strip plate 14. A screw hole 34 is formed in one of the blocks 32, and two bolts 31 are penetrated into the block 32 from the outside to be screwed into the block 32.
The surface of the inserted strip 14 is pressed against the other block 33 to be fixed. In the present embodiment, the leaf springs 35 that are appropriately curved in the vertical direction are interposed between the bolts 31 and the blocks 33 on both sides of the strip-shaped plate 14 so as to swing the jack lever 13 and the lever member 19. The end portion of the strip plate 14 is prevented from being excessively bent.

As shown in FIG. 4, as the strip plate 14, for example, a stainless plate having a width w of 8 mm and a thickness t of 0.4 to 0.8 mm is used. Any material may be used as long as it has sufficient strength to withstand a dynamic load of about 150 to 200 kg / mm ² and rigidity to withstand repeated bending deformation. Two thin metal plates may be stacked to meet this condition. See also FIG.
It is desirable that both ends 36 of the strip-shaped plate 14 have a rounded shape so as not to cause scratches (cracks) as shown in FIG. In order to obtain this shape, it can be manufactured by, for example, crushing a metal rod having a circular cross section thinly.

As described above, since the linear members for connection are made up of the strip-shaped plate 14 made of stainless steel, elongation does not occur even when a large dynamic load is applied, and jumping associated with lifting and lowering of the heald frame 2 is prevented. The weaving speed can be increased. Further, the strip plate 14 is lighter than a wire having the same strength and is easy to handle. That is, by using the mounting member 24 of the present embodiment, even if the belt-shaped plate 14 needs to be replaced, such as when it is damaged, it can be easily removed and installed, which is very effective in terms of maintenance. is there.

Further, by providing the lever member 19 as in the present embodiment, only one guide roller 16 is required, and if the lever member 19 is housed inside the upper frame 15, the appearance of the loom will not be impaired.

[0014]

In summary, according to the present invention, no harmful vibration is generated when the heald frame is moved up and down, and the weaving speed can be increased.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a dobby machine according to the present invention.

2 is a fragmentary side view showing the attachment member of FIG.

FIG. 3 is a plan view of FIG.

4 is a cross-sectional view taken along the line AA of FIG.

FIG. 5 is a side view showing a conventional dobby machine.

[Explanation of symbols]

 2 Held frame 14 Strip plate

Claims (1)

[Claims] 1. A dobby machine comprising a thin strip plate as a linear member for connecting to a heald frame of a loom.