JPH02456B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a dobby machine, and more particularly to a card switching device.

[Conventional technology]

In a loom equipped with a dobby machine, a leading hook that moves to two positions depending on the presence or absence of a peg on a card mounted on a rotating cylinder takes an engaged position and a disengaged position with a balk hook that swings periodically. Such reading mechanisms are known.

That is, an intermediate portion of a balk with a balk hook pivotally supported at both ends is pivotally supported at the tip of a half jack lever that can swing around a fixed axis different from the pivot axis of the leading hook. The balk hook is pushed by a pushing bar that alternately reciprocates in opposite directions with a 180 degree shift, and moves between an engagement position and a disengaged position with the leading hook as the balk swings.

[Problem that the invention seeks to solve]

In a loom having a dobby machine as described above, in addition to normal operation, there are various operations such as leveling operation to adjust the opening position of the heald frame, operation to replace a part of the peg on the card, etc. Requires equipment to perform the operation.

An object of the present invention is to provide a card switching device that can perform the various operations described above with a simple device.

[Means to solve the problem]

In the present invention, a cylinder supporting a pattern card is pivotally supported on a first lever that is swingable about one axis, and an output gear is fixed to the axis of the cylinder,
Furthermore, a second lever other than the lever is pivotally supported on the cylinder shaft, and an idle gear is pivotally supported on the second lever for transmitting the rotation of a gear fixed to the input shaft to the gear of the cylinder. The shaft of the idle gear is supported so as to be movable along a specific cam groove.

[Effect]

By moving the shaft of the idle gear along the cam groove, the cylinder shaft is displaced and a leveling position can be taken.

〔Example〕

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

FIG. 7 shows an example of a dobby machine to which the present invention is applied. That is, leading hooks 3a and 3b, which pivot to two positions depending on the presence or absence of the peg 2 of the card on the cylinder 1, are pivotally supported on fixed shafts 4a and 4b.

The pair of upper and lower leading hooks 3a, 3b
A spring 5 is applied between them, and a stopper 6
The leading hooks 3a, 3b are regulated in position to abut against a, 6b, and are affected by the action of the pegs 2. That is, the leading hook 3a is connected by peg 2.
or 3b pivots about the shafts 4a, 4b, and the leading hook 3a or 3b assumes the engagement position with the corresponding balk hook 7a or 7b.

On the other hand, an intermediate portion of a balk 10 is supported by a shaft 11 at the tip of a half jack lever 9 supported by another fixed shaft 8, and the balk 10 is rotatable about the shaft 11. At both ends of the balk 10, there are balk hooks 7a, 7b which can selectively engage and disengage from the leading hooks 3a, 3b.
2a, 12b.

Therefore, due to the movement of a cam lever (not shown), the push bars 13a, 13b swing around another shaft concentric with the shaft 11, and the balk hooks 7a,
The back surfaces 14a and 14b of the balk hook 7b are pressed alternately, and the balk hook 7a or 7b reaches the engagement position with the corresponding leading hook 3a or 3b, whereby the balk hook 7a and the leading hook 3
a, or the balk hook 7b and the leading hook 3b engage.

For example, now, when the balk hook 7a and the leading hook 3a are engaged, the push bar 13b
When the balk 10 pushes the other balk hook 7b, the balk 10 moves integrally with the shaft 11 using the engagement point between the balk hook 7a and the leading hook 3a as a fulcrum, and the half jack lever 9 moves around the fixed shaft 8 at the seventh position. Rotates in the clockwise direction. When the jack lever 17 connected to the half jack lever 9 via the connecting rod 15 and the adjuster 16 turns clockwise about the shaft 18, the heald frame connected to the jack lever 17 via a wire cable is opened. The shedding movement of the warp threads is performed by rising or falling.

In FIG. 7, reference numeral 19 is a guide roller for the pattern card. For example, if the number of cards is 8, the card is attached only to the cylinder 1, and when the number of cards is 8 or more, the pattern card is attached as shown by the two-dot chain line 20. rolled around.

Next, the card switching device T according to the present invention will be explained with reference to FIGS. 1 and 2.

The shaft 21 of the peg cylinder 1 is supported by first levers 23, 23 supported by a fixed shaft 22 via bearings, and a second lever 24 is further pivotally supported at one end of the cylinder shaft 21. ,
Output gear G4 is fixed. A pin 25 is fixed to the first lever 23, and the pin 25 is positioned in a hole 27 formed on the fixed bracket 26 side, and the first lever 23 is moved to the shaft 22 via the pin 25 by a compression spring 28. The center is biased counterclockwise.

The second lever 24 has an idle gear G2,
G3 is pivoted 29 and 30, gears G2 and G3 mesh, and gears G3 and G4 mesh. Also, the shaft 29 of the idle gear G2 and the shaft 2 as shown in FIG.
The shaft 29 supported by the second lever on the other side on the same straight line as the shaft 29 is located in a cam groove 32 formed in a fixed cam plate 31.

An input gear G1, which is fixed at a fixed position on the input side, meshes with the idle gear G2. Therefore, in the state shown in FIG. 1, that is, during normal operation, input gear G1, idle gears G2, G3,
The positions of the cam grooves 32 are determined so that the shafts 33 to 21 of the output gear G4 are aligned in a straight line.

Further, in FIGS. 2 and 3, positioning levers 34, 34 that engage with the shafts 29, 29 on the second lever 24 are fixed to a shaft 35 on the same straight line as the input shaft 33. An operating lever 36 is fixed to one end of the shaft 35. A curved groove 37 is formed in the positioning lever 34, and the shaft 29 is located within both the curved groove 37 and the cam groove 32.

The cam groove 32 is formed of two cam grooves 32a and 32b with different curvatures, the first cam groove 32a is an arcuate groove centered on the shaft 33 of the input gear G1, and the second cam groove 32a is an arcuate groove centered on the shaft 33 of the input gear G1. The cam groove 32b is formed as an arcuate groove centered on the axis of the output gear at the leveling position, which will be described later, and the upper end of the second cam groove is open, allowing the second lever 24 to be removed.

Note that G5 in FIG. 1 is a gear that meshes with the idle gear G2 when the shaft 29 on the second lever 24 is positioned at a specific position in the cam groove 32, and the idle gear G2 is separated from the input gear G1. The peg cylinder 1 is allowed to freely rotate through the handle 38 and the gear G6 fixed to the shaft 39 of the handle 38 performs the loosing operation.

Next, the leveling operation will be explained.

To obtain the leveling state from the normal operating state shown in FIG. 1, the operating lever 36 shown in FIG. 3 is rotated by a certain angle θ1 in the direction of the arrow 40 from the normal operating position 0 shown by the solid line to move the lever 36 to the dashed-dotted line position 36a. . A curved groove 37 of the positioning lever 34 that rotates integrally with the lever as the lever 36 moves.
The shaft 29 of the idle gear G2 located inside moves along the fixed cam groove 32a and is positioned at the leveling position 29a in FIG. 4. The movement of the shaft 29 causes the second lever 24 to move together with the spring-biased first lever 23, from the position of FIG. 1 to the position of FIG. 4. Therefore, the axis 21 of the peg cylinder supported by the first lever 23
a moves away from the levers 41a and 41b of the leading hook by a distance a from the normal operation position 21, and a space is created between the virtual circle 42a connecting the tips of the pegs and the peg contact surfaces of the levers 41a and 41b. The relationship between the peg and the leading hook 3a is now severed.

In this state, push bars 13a, 1 in FIG.
If 3b is reciprocated several times, Borkhutsk 7a,
Leading hooks 3a, 3 that were engaged with 7b
In b, the balk hooks 7a and 7b are pushed and slightly moved to the most forward position, creating a gap α between the engaging surfaces of each hook, and at this moment, the leading hook 3b is moved by the spring 5 to the non-engaging position and is fixed. This is the position where it abuts against the stoppers 6a and 6b. In this way, all the balk hooks 7a or 7b that were engaged with the leading hooks 3a or 3b come into contact with the stoppers 6a or 6b, and all the heald frames are positioned at the lowest or highest positions. It is. In this state, the operator adjusts the position of each heald frame, ie, performs leveling work.

In FIG. 3, when the operating lever 36 is further turned from the leveling position by an angle θ2 in the direction of arrow 43 and positioned, the shaft 29 of 24 on the second lever moves from the position 29a in FIG. 4 to the position 29b in FIG. Moving. That is, the shaft 29 moves along the cam groove 32b and reaches position 29b in FIG. 5. At this time, since the cam groove 32b is on a circular arc centered on the shaft 21a of the peg cylinder at the leveling position in FIG. 4, the second lever 24 pivots counterclockwise around the shaft 21a. . Therefore, it is also possible to perform the tufting operation by utilizing the movement of the cam member 44 formed on the second lever 24 as the second lever 24 pivots.

In addition, in FIG. 7, when the pattern card 20 is wound around the cylinder 1 via the guide roller 19 as shown by the two-dot chain line, when the pegs of a part of the card are to be replaced, the pegs to be replaced are It is necessary to feed the card to a position where it can be easily placed, but in the state shown in FIG. 7, it is impossible to feed the card by rotating only the peg cylinder with the input gear G1 stopped. That is, this is because the input gear G1 becomes locked when the loom stops.

Therefore, in such a case, the second lever 24b, that is, the gear group G2b, G
3b and G4a are positioned. That is, at this position, idle gear G2
b is in a position separated from the fixed position input gear G1, and the idle gear G2b is placed in the loosing gear G5.
mesh together. Therefore, when the handle 38 is turned, the peg cylinder gear G4a rotates via gears G6, G5, G2b, and G3b, and since the peg on the cylinder is also in a separate position unrelated to the leading hook, the peg cylinder can rotate freely. You can send any number of pattern cards.

FIG. 6 shows the positional relationship of each lever and gear during normal operation, leveling, tufting, or loosing. line 23, 23
a indicates the movement of the first lever 23 and lines 24, 24
a, 24b indicate movement of the second lever. Other symbols correspond to those in FIGS. 1, 4, and 5.

〔Effect of the invention〕

As described above, in the present invention, with a simple mechanism, the peg cylinder can be appropriately adjusted to a state in which the leveling operation can be performed by only operating the operating lever, and the workability is good. Further, in the present invention, when the shaft of the idle gear is moved from the leveling position of the cam groove along the second cam groove, the second lever 24 is moved from the cylinder shaft 2 to the second cam groove.
By rotating around 1, it becomes possible to perform tufting operation using this movement, and furthermore, since the idle gear meshes with the loosing gear at the end of the second cam groove, it is possible to prevent the pattern card from rotating idly. You can freely perform maintenance, replanting the pegs on the card, etc. In other words, leveling can be achieved by simply moving the idle gear shaft within the cam groove.
Works such as tufting and loosing can be easily performed.

[Brief explanation of drawings]

FIG. 1 is a schematic front view showing an embodiment of the device of the present invention, FIG. 2 is a cross-sectional side view of the same, FIG. 3 is a front view showing the positional relationship of the operating levers, and FIG. 4 is a front view in a leveling state. FIG. 5 is a front view of the ruching state, FIG. 6 is a line diagram showing states of various positions in one drawing, and FIG. 7 is a front view showing an example of a dobby machine to which the present invention is applied. 1...Cylinder, 20...Pattern card, T
...Card switching device, 21...axis, 22...axis,
23...first lever, 24...second lever,
29...Shaft, 32...Cam groove, G1-G4...Gear, 29a...Leveling position, 29b...Lusting position, 32a...First cam groove, 32b...
...Second cam groove.

Claims (1)

[Claims] 1 A cylinder for transferring a pattern card is pivotally supported on a first lever that can swing around a single shaft, an output gear is fixed to the shaft of the cylinder, and a shaft other than the lever is fixed to the shaft of the cylinder. another second
A lever is pivotally supported on the second lever, and an idle gear for transmitting the rotation of the fixed input gear to the output gear is pivotally supported, and the shaft of the idle gear is in a cam groove fixed to the frame. and the cam groove is formed from a first cam groove and a second cam groove continuous to the first cam groove, and the first cam groove is The second cam, which is formed as an arc-shaped groove centered on the input gear axis, and which follows the first cam groove, is located at the end of the first cam groove and is located at the position where the idle gear axis has moved. The loosing gear is formed as an arc-shaped groove with a radius centered on the output gear axis, and is disposed at a position where it meshes with the idle gear when the idle gear axis is located at the end of the second cam groove. Features a card switching device in Dobby machines.