JPH059834A - Jacquard mechanism - Google Patents

Abstract

PURPOSE: To provide an adjustably drivable Jacquard mechanism for knives capable of carrying out adjustment for easily changing the ratio of sheds. CONSTITUTION: The Jacquard mechanism for weaving has many rows of heald supporting devices. The respective rows are stretched in the direction of weft and these rows are spaced toward warp. At least one group of knife bars has the respective knife bars for cooperation with each of retention devices. The respective knife bars lift and lower the many heald hooks between the upper and lower positions in order to be selectively engaged with the selected retention devices of the rows described above. The one group of the knife bars is arranged on a carrier. This carrier is lowered to a lower position and is lifted to an upper position by drive means. The carrier is rotatably disposed with respect to the drive means and is connected to the drive means. The rotational drive means tilts the carrier between the first rotating position in the lower position of the carrier and the second rotating position in the upper position of the carrier.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jacquard mechanism for weaving, and more particularly to a drive mechanism for raising and lowering a heald.

[0002]

2. Description of the Related Art For example,
In an electronic jacquard mechanism of the type disclosed in our British patent 2047755, multiple healds are controlled by multiple solenoid operated holding devices. The solenoid holding devices are arranged in rows extending in the weft direction, and the rows are spaced in the warp direction.

Usually, in each row of solenoid holding devices, a set of knives oscillating 180 degrees out of phase are provided to raise and lower the heald hooks of each set. The heald hooks of each of these sets are connected to independent healds or a selected set of healds. The set of heald hooks are connected to each other via flexible elements arranged near the wheels, while the frame that moves the wheels is connected to the healds.

Each heald is biased downwards by biasing means, usually in the form of a spring. The spring is attached at one end to an anchor rod movably arranged for adjustment on the main frame of the machine and at the other end to a heald.

The position of the anchor bar is adjusted to provide the correct bias tension so that a given heald is always correctly biased to its lower position.

As indicated above, there is a set of knives for each row of holding devices. The knives are arranged in two groups. One group has each set of knives and another group has each set of other knives.

Each group of knives is moved by a respective knife moving frame, which frame is driven by a drive mechanism.
It is moved up and down in different phases.

The actual lower position of each heald is determined by the lowest position of the engaged knives. Because
This is because the uppermost position of each knife is usually maintained at a constant level with the holding device engaged to put the heald hook in the correct position for operational selection.

Usually, after the initial operation of the machine, the adjustment of the lowermost position can be done by adjusting the displacement distance of the knife moving frame. However, such adjustments are either more or less oblique, but the shed (triangular clearance) does not change its proportion, ie the relative displacement between the front and the back of the shed. .

It is desirable to adjust the lowermost position of the knife for the purpose of adjusting the ratio of sheds for weaving different types of yarn. For example, if a wooly yarn is used as the warp yarn, it is desirable that the maximum separation of the warp yarns be achieved at the fel in order to reduce interference between adjacent warp yarns.

This type of shed can be achieved with a row of knives which are arranged substantially parallel to the warp threads when the knife is in its lowest position. It would be desirable to manufacture a more oblique shed for other yarns.

It is a general object of the present invention to provide a jacquard mechanism including an adjustable drive mechanism for a knife which can be easily adjusted to change the ratio of sheds.

[0013]

In accordance with one aspect of the present invention, a jacquard mechanism for weaving is provided, the jacquard mechanism having multiple rows of heald support devices, each of which includes a plurality of heald support devices. The rows are stretched in the direction of the weft threads and the rows are spaced in the direction of the warp threads, at least one group of knife bars having respective knife bars for interlocking with respective holding devices, each The knife rod raises and lowers a number of heald hooks between upper and lower positions for selectively engaging selected retainers of the row, the group of one knife rods being disposed on a carrier. Is lowered to a lower position or raised to an upper position by an elevating and lowering driving means, and its carrier is rotatably arranged with respect to the elevating and lowering driving means and is connected to the rotational driving means. The carrier diagonally between the second rotational position in the first rotational position and the upper position of the carrier at the lower position of the.

Preferably, a set of knife rods is associated with each row of holding devices, the knife rods being arranged in two groups thereof, one group having one knife rod of each set and the other group. Has another set of knife rods, each group being arranged on a respective carrier, which carrier is
It vibrates between the upper and lower positions with different phase.

Preferably, the holding device is interlocked with the hook when the hook is raised to the upper position and the rotary drive means is adjustable to adjust the rotational position of each carrier when the carrier is in the lower position.

Conveniently, the lift drive means for each carrier includes a main lever which is axially oscillated between an upper and a lower position by the rotary drive means, the carrier rotating on the main lever. It is arranged as possible.

Advantageously, the distance range of vibration of the main lever is adjustable. Preferably for each carrier, the rotary drive means comprises a lever coupling device, one end of which is connected to the carrier and the other end of which is connected to the frame of the jacquard mechanism, by means of which the movement of the main lever causes the first and second movements. Vibrate between the rotational positions of.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring initially to FIGS. 1 and 2, a knife rod 1
Two groups of 0 and 11 are shown, one in the uppermost position and the other in the lowermost position. Knife stick 1
Each group of 0 and 11 is moved up and down by the drive mechanism 50 as shown in FIG.

1 and 2, each set of knife rods, one of each set 10, 11 cooperates with a set of heald hooks (not shown). The heald is in turn connected to the anchor bar 20 and this anchor bar 20
Are adjustably arranged on the main frame of the machine. Each heald is attached to the anchor bar 20 via a bias spring 22.
Connected with. The connection between each spring 22 and the pair of heald hooks is schematically illustrated by the dashed lines in FIGS.

The formation of the shed 25 is accomplished by holding a selected set of heald hooks. As a result, the connected heald is held in the raised position, which determines the upper portion 26 of the shed 25. Held hooks are maintained in contact with knife bars 10 and 11, respectively,
It is in the lower position and thereby defines the lower portion 27 of the shed 25.

The lowest position of each heald is determined during the beginning of the machine procedure. As a result, when the heald hook is placed on the hook knife and one of the hook knife sets is in the uppermost position and the other set of hook knives is in the lowermost position,
All warp threads lie in the same plane.

In accordance with the present invention, the lowest position of each heald is provided by adjustment of drive mechanism 50. This adjustment adjusts the total separation between the upper part 26 and the lower part 27, respectively, of the shed 25 and / or relative to the front and rear parts of the yard 25, referred to herein as shed ratio. It is done to adjust the displacement.

The drive mechanism 50 according to the present invention has a set of drive frame parts, and the drive frame parts vibrate by 180 degrees out of phase. One drive frame component raises and lowers a group of knife rods and another drive frame component raises and lowers another knife rod.

Only one drive frame component is shown in FIG. 3 for simplicity and clarity. The drive frame part 51 includes a set of support levers 52 (only one of which is shown) spaced laterally from each other.

Each lever 52 is arranged on a frame 64 of the machine via a shaft connection 57. Knife rod support lever 5
3 is pivotally connected to the end of each lever 52 by a pivotal connection 58.

A number of knife rod support arms 54 are pivotally dependent from each lever 53. Knife rod 55
Are horizontally (horizontally) extended and supported by opposite support arms 54 arranged on respective levers 52. Each lever 52 includes a crank arm 56, which is connected to a link arm 61 via a shaft connection 60.

The link arm 61 is also connected to the frame 64 of the machine via a shaft connection 63 so as to be rotatable about its axis. The drive arms 70 are connected to each other's levers 52 via axial connections 72, and the drive arms 70 are vibrated via an eccentric drive shaft (not shown) to raise and lower the levers 52.

Lever 52 is shown in solid line at its uppermost position and in dashed line at its lowermost position. Axial connection 72 is adjustable to make adjustments for all displacements of the knife rod support lever 53 between the upper and lowermost positions (and for all separations between the upper and lower yard). And its position can be moved towards and away from the shaft connection 57.

The shaft connection 72 is thus defined by a movable shaft pin, which is selectively engageable in one of a set of holes 80 formed in the lever 52. Since the lever 52 vibrates between the upper and lowermost positions, the crank arm 56 and the link 61 cooperate with each other, and the support lever 53 vibrates rotatably around the shaft 58.

With a given setting of shaft 72, the amount of rotational displacement about shaft 58 will be
6 and the effective length of the link 61. The shorter this length, the greater the rotational displacement. This effective length adjustment is preferably relative to the frame 64 by the shaft 63.
It is achieved by changing the position of. The selectable position is represented generally by the numeral 90 and is achieved by a movable shaft pin. The axle pin is then selectively engaged with one of a set of holes formed in the frame 64.

Preferably, the selectable positions 90 are arranged in generally vertically extending rows. In this way, the rotational position of the support lever 53 in the uppermost position is substantially the same regardless of the position of the shaft 63. Therefore, by locating the shaft connection 63 in different positions, the lever 5
2 is in the lowermost position, the front end 53 of the support lever 53
The displacement at a is changed relative to that at the rear end 53b. Therefore, it is possible to change the ratio of the shed by a simple means of selecting the position of the shaft connection 63.

The two extremes of the shed ratio are shown schematically in FIGS. 1 and 2. In FIG. 1, a low shed ratio is shown, for example when the lever 52 is in a low position thereby forming a generally slanted forward shed position 25a, the front end 53a is It is located in a high rotational position. In FIG. 2, the ratio of the shed is shown high. For example, when the lever 52 is in the low position thereby forming the forward portion 25a of the shed, the front end 53a is in the low rotational position. The shed is sharper and therefore allows a greater separation of warp threads at the front end of the shed.

[0033]

As described above, according to the jacquard mechanism of the present invention, adjustment for changing the ratio of the shed can be easily performed. Therefore, the jacquard mechanism of the present invention can be suitably used for weaving different types of yarns.

[Brief description of drawings]

FIG. 1 is a schematic view of a knife rod arranged to form an oblique-shaped shed.

FIG. 2 is a schematic view of a knife bar arranged to form a parallel-shaped shed like FIG.

FIG. 3 is a schematic view of a driving mechanism for forming the shed method shown in FIGS. 1 and 2.

[Explanation of symbols]

10 knife stick 11 knife stick 20 anchor rod 22 Bias spring 25 shed 26 Upper 27 Lower part 50 drive mechanism 51 Drive frame parts 52 Support lever 53 Knife rod support lever 54 knife rod support arm 55 knife stick 56 crank arm 57 axis connection 58 axis connection 61 Link Arm 63 axis connection 64 frames 70 Drive arm 72 axis connection 80 holes

Claims (7)

[Claims] 1. A jacquard mechanism for weaving, the jacquard mechanism having multiple rows of heald support devices, each row extending in the direction of the weft and the row in the direction of the warp. Spaced and at least one group of knife rods has respective knife rods for interlocking with respective holding devices, each knife rod being selectively associated with a selected holding device of said row. In order to fit, a number of heddle hooks between upper and lower positions are raised and lowered, said group of one knife bar being arranged on a carrier, said carrier being lowered to a lower position or raised to an upper position by means of a lifting drive. The carrier is rotatably arranged with respect to the lifting drive means and is connected to the rotary drive means, the rotary drive means being in a first rotational position at a lower position of the carrier and at an upper position of the carrier. The jacquard mechanism characterized in that the carrier is inclined between the second rotation position and the second rotation position. 2. A set of knife rods is associated with each row of holding devices, the knife rods being arranged in two groups thereof, one group having one knife rod of each set and the other group being With each set of other knife rods, each group placed on each carrier,
2. The jacquard mechanism according to claim 1, wherein the carrier vibrates between the upper and lower positions with a phase difference of 180.degree. 3. The holding device is interlocked with the hook when the hook is raised to an upper position, and the rotation driving means is adjustable to adjust the rotational position of each carrier when the carrier is in the lower position. Claim 1 or claim 2
The described jacquard mechanism. 4. A lift drive means for each carrier includes a main lever which is axially oscillated between an upper and a lower position by a rotary drive means, the carrier being rotatable relative to the main lever. The jacquard mechanism according to claim 1, 2 or 3, wherein the jacquard mechanism is arranged. 5. The jacquard mechanism according to claim 4, wherein the distance range of vibration of the main lever is adjustable. 6. For each carrier, the rotary drive means comprises a lever coupling device, one end of which is connected to the carrier and the other end of which is connected to the frame of the jacquard mechanism, by means of which coupling the first lever moves. The jacquard mechanism according to any one of claims 1 to 5, wherein the jacquard mechanism vibrates between the second rotation position and the second rotation position. 7. The jacquard mechanism according to claim 6, wherein a lever connecting part is adjustably connected to the frame for changing the distance range of the vibration.