JPS5932574B2 - How to open pile warp threads in a jacquard machine for towel pattern weaving - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for opening pile knit yarns in a jacquard machine for towel pattern weaving.

In recent years, the number of rotations has increased due to the use of rapier towel looms, and the conventional single- or middle-opening method cannot keep up with the number of rotations of a jacquard loom, so fully-opening Jacquard looms are increasingly being used. It has become.

On the other hand, in the case of a towel jacquard pattern consisting of free curves such as a floral pattern, there was no problem with the full-opening method; , or in a geometric pattern composed of vertical and horizontal lines, if we look at the state of pile change on a certain weft line,
For example, up until now, only odd-numbered pile knit yarns were woven on the front side of the towel loom, and only a very small number of even-numbered pile warp yarns were woven on the back side, but after the next weft line, most of the pile yarns were woven on the back side. A situation occurs in which all the odd-numbered pile warp yarns are woven on the back side, and only a few even-numbered pile warp yarns are woven on the front side, and because it is completely open, in the case of continuous raising (or lowering), it becomes a jacquard belt. continues to occupy the raised (or lowered) position, and when the front and back conditions suddenly change as described above, the jacquard belt changes its position from raised to lowered and from lowered to raised, so it is inevitable that Sudden tension fluctuations also occur in the pile warp yarns, and towels with an appropriate pile length were woven with the optimal tension for the pile structure, but now due to the sudden change in pile tension, the pile length becomes particularly short on the conversion line. In some cases, the pile disappears, and the woven towel fabric is sometimes woven with transverse grooves in the abdomen, which is considered a defect in terms of appearance and quality.

The present invention has been made in order to solve the above-mentioned drawbacks. Specifically, while weaving the part of the pattern where the tension of the pile warp threads does not change suddenly, shedding is carried out in the full shedding method, and several picks before or after the point where the tension suddenly changes. Immediately before that, the main plate supporting the lower end of the vertical needle is raised and lowered through the vertical needle movement according to the instructions from the jacquard pattern paper, and the vertical needles, that is, the jacquard belt tracker is linked in a state similar to the center opening method, to create pile vertical threads. The method of the present invention will be explained below with reference to examples.

In FIG. 1, a jacquard base plate 1 is placed on a frame 2, and together with the frame 2, is placed on a fixing member 3.

A large number of holes 4 are bored in the base plate 1, and a jacquard belt is fixed to a vertical needle 5 supported on the base plate.

Reference numeral 6 denotes fixed plates fixed to the front and rear of the main plate 1.

Further, on the fixed plate 6, a substantially ■-shaped lever 7.7 is pivotably supported 8, 8, one end of the lever 7.7 is pivoted on a sliding rod 9, which will be described later, and the other end is pivotably supported. Lever 11.1
The base plate 1 is connected to the frame body 2 through which the base plate 1 is placed.

Therefore, by turning the V-shaped bar 7.7 in the counterclockwise direction about the axes 8, 8, the main plate 1 can be moved upward from the position shown by the broken line (lower position) to the position shown by the dashed-dotted line 1a (upper position). .

The sliding rod 9 extends left and right, has a V-shape at one end, and is pivotally supported 10 on one end of the bar 7, and a roller 13 is pivotally supported 14 on the other end, and the roller 13 is fixed to a shaft 15 and swings. It is fitted into a recess 17 at the tip of the swinging arm 16.

Furthermore, another cam lever 18 is fixed to the shaft 15, and the roller 19 at the tip causes left and right displacement as the cam plate 20 rotates, and by pivoting the cam lever 18 in the direction of the arrow 21, the swing fixed to the shaft 15 is achieved. The arms 16 are simultaneously swung in the direction of the arrow 21.

2 to 4 show a driving device for the cam plate 20. As shown in FIG.

That is, the cam plate 20 is normally stopped, and only the drive shaft 22 and the disc body 23 fixed to the drive shaft 22 are constantly rotating.
The mechanism is such that a cam plate rotates in conjunction with the disk body 23 only when necessary.

That is, in FIGS. 2 and 3, the drive shaft 22 has a disk body 2.
4 is fixed, a disk body 23 is further fixed with bolts 25, and a cam plate 20 is fitted to the disk body 23 via a bearing 26.

Therefore, normally the rotation of the drive shaft 22 is not transmitted to the cam plate 20, and the drive shaft 22 and the disc body 23 only rotate integrally.

As shown in the third figure, the disc body 23 has a notch 2T carved in one place around its periphery, and only when the engagement piece 28 provided on the end face of the cam plate 20 engages with the notch 27 does the cam plate 20 open. Rotate.

The engaging piece 28 is fitted so as to slide in a radial slide groove 29 formed on the end surface of the cam plate 20, and the engaging piece 28 is pivotally supported on the tip of a lever 30 that is pivotally supported on the cam plate 20. A spring 32 is applied to one end of another lever 31 which is integrally supported with the shaft, and the lever 30.31 is biased clockwise around the shaft 33, so that the upper end of the lever 31 is always connected to the circumferential surface 20a of the cam plate 20. It is provided so as to be located further outward.

A stop lever 34 is supported by a fixed shaft 35 on the machine base side and biased clockwise by a spring 36, and normally engages with the lever 31 to prevent the cam plate 20 from rotating in the direction of the arrow 37.

Further, FIG. 4 shows the operating mechanism of the stop lever 34.

That is, a receiving member 40 is pivotally supported at one end of a lever 39 that is pivotally supported by a fixed shaft 38, and supports a tip 41a of a lever 41 that pivots integrally with the stop lever 34.

Further, the lever 41 is biased clockwise by a spring 42, and is normally in contact with the lever 39 in the position shown in FIG.
Further, a connecting rod 43 is pivotally supported from the lever 41, and the lower end of the connecting rod 43 is connected to a lever 45 that is pivotally supported integrally with another stop lever 44 on the opposite side of the stop lever 34 by 180 degrees.

Therefore, the two stop levers 34, 44 are operated simultaneously.

Further, a rod 48 connected to a lever 47 suspended from a jacquard belt 46 is connected to the other end of the lever 39.

Therefore, when the vertical needle 49 is pulled upward by the pattern command, the lever 47 suspended from the jacquard belt 46 turns around the shaft 50 and pushes the rod 48 downward, and the lever 39 moves around the shaft 38. Because it rotates in the direction of arrow 51,
The lever 41 follows and turns in the direction of the dotted arrow 52 up to a certain position, and the stop lever 34 also turns in the same direction against the spring 42.

At this time, the stop lever 34 shown in the third figure is disengaged from the lever 31 and disengaged, and the lever 31 is rotated clockwise around the shaft 33 by the spring 32, so that the stop lever 34 is integrally connected to the lever 31. The engaging piece 28 at the tip of the rotating lever 30 descends along the slide groove 29 and engages with the notch 27 of the disc body 23 rotating together with the drive shaft, and the cam plate 20 rotates in the direction of the arrow 37. I will start.

With the above-described device, the base plate 1 shown in the first figure is normally positioned at a lower position, so that the warp threads form a fully open shed.

A few picks before or immediately before the point where the tension of the pile warp thread changes, the vertical needle 49 shown in FIG. , the lever 39 rotates clockwise around the shaft 38 via the rod 48, and the lever 41, which is in contact with the receiving member 40 at the tip of the lever 39, is moved to the shaft 53.
Once pivoted in the direction of dotted arrow 52 around Turn in the direction and press lever 3.
The engagement piece 28 at the 0 end slides in the groove of the cam plate 20,
The cam plate 2 enters the notch 27 of the disc body 23 on the drive shaft side.
0 starts rotating in the same direction as the drive shaft 22.

That is, the cam plate 20 shown in FIGS. 3 and 4 rotates together with the drive shaft 22 in the direction of arrow 37, and the cam roller 19 of the lever 18, which is engaged with the recess 54 on the circumferential surface of the cam plate 20, rotates on the circumferential surface of the cam plate 20. Since the swing lever 18 rotates along the arrow 55, the shaft 15 to which the lever 18 is fixed also rotates in the same direction.

Furthermore, as the shaft 15 rotates, the swinging arms 16 fixed to both ends of the shaft 15 also swing in the same direction, so that the swinging arms 16
The sliding rod 9 moves to the right via the roller 13 fitted in the recess 17 at the end, and the V-shaped bar 7.7 pivotally supported by the sliding rod 9 moves counterclockwise around the shaft 8. It turns in the direction of the needle, and the frame 2 and base plate 1 suspended from the V-shaped bar 7 rise to a certain height.

Then, when the cam plate 20 rotates 180 degrees, another stop lever 44 located 180 degrees from the stop lever 34 rotates.
are interlocked by the connecting rod 43, so when the cam plate rotates 180 degrees, the stop levers 34 and 44 have returned to their original positions, and the upper end 31a of the lever 31 of the cam plate 20 comes into contact with the stop lever 44, 3. The state shown in Figure 3, that is,
The lever 31 engages with the stop lever 34, rotates counterclockwise against the spring 32, and the retaining piece 28 comes out of the notch 27 of the drive shaft side disk body 23, and the cam plate 2 as shown by the solid line
0 appears in the groove 29 of the cam plate 20 at a position rotated 180 degrees, the cam plate 20 stops, and the roller 19 at the end of the lever 18 in FIG. The shaft 15 is rotated in the direction of arrow 56, and the swinging arm 16 is also returned to its original position at the same time.

Accordingly, when the sliding rod 9 also returns to the position shown in FIG. 1, the base plate 1a, which had been raised, is lowered and returned to its original position.

As described above, in the present invention, while weaving the part of the pattern where the tension of the pile warp yarn does not suddenly change, the shedding is performed in full shedding method, and the Jacquard pattern paper is commanded several picks before or immediately before the part where the tension suddenly changes. By instantly raising and lowering the base plate that had secured full opening movement through the vertical needle movement, the function of the fixed base plate was eliminated and the vertical needle was able to move in a state similar to the middle opening method. Since the jacquard belt does not change its position suddenly when it is raised or lowered, the tension of the lower pile yarn does not suddenly change all at once, making it possible to punch out the pile warp yarns on the front and back sides of the towel. Even when the jacquard pattern is a picture frame pattern, a geometric pattern composed of vertical and horizontal lines, etc., it prevents sudden tension changes in the pile warp threads on the border of the pattern, and eliminates defects such as pile disappearance and weaving. It is possible to eliminate this problem.

[Brief explanation of drawings]

Fig. 1 is a schematic front view showing an actual case of a device for implementing the present invention, Fig. 2 is a sectional side view showing the relationship between the cam plate and the drive shaft, Fig. 3 is a front view of the same, and Fig. 4 The figure is a schematic front view showing the cam plate of the device. 1...Main plate, 5...Vertical needle, 7...
...V-shaped bar, 9...Sliding rod, 19.
...Swinging arm, 20...Cam plate.

Claims (1)

[Claims] 1. In the part of the pattern where the tension of the pile warp threads of the Jacquard machine for towel pattern weaving does not change suddenly, the base plate supporting the lower end of the warp needle is maintained in a continuously lowered position and the warp threads are opened using the full opening method, and the pile warp threads are opened using the full opening method. From a few picks or just before the point where the tension suddenly changes, the 1st drive unit for raising and lowering the main plate is driven 1 time through the vertical movement according to the command of the Jacquard pattern, and the main plate that ensures full opening movement is raised and lowered, and then fixed. A method for shedding pile kuchi yarn in a jacquard machine for towel pattern weaving, characterized in that the function of the base plate is eliminated and the shedding movement is made in accordance with the center shedding method.