JPS60162831A - Reading apparatus in dobby machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Sometimes, in order to prevent tissue collapse, the operation of the loom is first stopped, then the shedding movement of the dobby machine is returned to the state at the time of cutting the weft thread, and the cut weft thread is removed. In order to do this, the pattern card or the peg cylinder with the pegs planted thereon is returned by one pick to the reverse position, and the loom is moved in the reverse direction to return to the open state at the time of cutting the weft thread. In this state, the cut weft yarn remaining in the warp yarn opening is removed, and then the card or peg cylinder is positioned at the normal rotation position, and then normal operation is resumed.

Further, in a loom, a leveling operation is performed to position a plurality of belt frames at the same level and perform operations such as threading the warp thread and adjusting the shedding amount.

Therefore, during leveling, the peg cylinder is retracted from the leading lever, which is displaced in accordance with the presence or absence of all the pegs, and can be moved to a position where the relationship with the peg cylinder is severed.

On the other hand, when the peg cylinder is moved back by one pick to position it in the reverse position, the relationship between the peg cylinder and the leading lever must be maintained at the normal position. That is, when positioning to the reverse position, if the rotation center of the peg cylinder shifts, the following position of the leading lever relative to the peg shifts, and the engagement mechanism of the holding hook integrated in the leading lever and the movable hook on the jack lever side in the normal case will shift. When the loom is about to reverse, the holding hook and the movable hook may become disengaged.

The present invention was made in view of the above-mentioned problems, and aims to maintain the same position of the rotation center of the peg cylinder during forward and reverse rotation, and to allow the peg cylinder to be moved during leveling. It is something.

That is, in the present invention, a part of an arm that can be pivoted around the -axis is brought into contact with a pivotable bracket that supports a peg cylinder, and the abutting part is on a circular arc centered on the -axis, Further, the arm is provided with a motion transmission switching member that causes the peg cylinder to rotate forward or backward by at least one pick when the arm pivots.

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

FIG. 1 shows a schematic configuration of a dobby machine.

That is, holding hooks (3a) (3b), which pivot between two positions depending on the presence or absence of the peg (2) on the cylinder (1), are pivotally supported on fixed shafts (4a) (4b), and the holding hooks (3a) (
3b) Haft lever (5aM5b) and leading lever (5a) (6b) are connected to springs (7a) (7b)
The hook levers (5aM5b) (7) are connected by the springs [7a] (7b) and rotate integrally.
) Allows for slight rotation against force.

The holding hooks (3a') (3b) are connected to the hook lever (
5a) (With the spring (8) connected between 5N,
Attach the hook levers (5a) (5) to the stoppers C9a (9b).
The position is restricted to the position where N contacts, and is affected by the peg (2). That is, the leading lever (6a) is pivoted around the axis (4a) by the peg (2) on the cylinder (1).

The hook lever (5a), which rotates integrally, connects the movable hook (
10a).

On the other hand, the baud lever (
The middle part of the balk C13) is attached to the tip of the shaft support (12).
4), and the balk (13) is rotatable around the axis (14). At both ends of the boke (13), there are movable hooks (10aM10b) that can selectively engage and detach from the holding hooks (3a') and (3b).
15b) Tail tail.

A bushing bar (18aM18b) reciprocates in the directions of arrows (16) and (17) from a shaft (not shown) of a dobby machine that is driven in conjunction with the loom. ) or (10b
) is pre-positioned in the engaged position of the retaining hook (3).
a) or (3b), the Baud lever (12) rotates at a certain angle clockwise around the fixed shaft (11), and the Rondo (
19), the jack lever (21) connected via the adjuster (20) turns clockwise around the fixed shaft [22], and the jack lever (21) is connected via the wire cable (23) connected to the jack lever (21). Then, a belt frame (not shown) suspended from the wire cable is raised or lowered, and the belt frame is lowered or raised by turning the jack lever (21) in a counterclockwise direction from the above-mentioned turning position.
The shedding movement of the warp threads is controlled.

A reading device (
g) will be explained with reference to FIGS. 1 to 3.

The peg cylinder (1) is pivotally supported (26) by brackets (25) (25) that are rotatable around a fixed shaft (24), and a spring (27) is attached to one end of the bracket (25') (25). The shaft (24) is biased counterclockwise around the shaft (24).

Furthermore, the rotating shaft (26) has a sprocket C28).
is fixed. −The drive shaft that inputs the drive from the power loom (
29) is supported by the frame (30) so as to be rotatable forward and backward, and a sprocket (31) is attached to the end of the shaft (29).
) is fixed, and a chino (32) is applied with a certain degree of slack between each of the sprockets (28031).

Also, the frame (33) has a reversed peg cylinder.

A shaft (34) that performs leveling positioning is supported, one end of the shaft (34) is supported by the end of the drive shaft (29) via a bearing (35), and the shaft (34) is supported by the end of the drive shaft (29) via a bearing (35).
34) is located on the center line of the drive shaft (29).

Therefore, power transmission between the drive shaft (29) and the shaft (34) is interrupted. The shaft (34) has an arm (3
6') (36) are fixedly formed in one direction, and the arm (3
6) The side edge (37) of (36) is formed as a circular arc surface centered on the axis 0 of the shaft (34),
) is considered to be the real part (38), and a part of the cam follower (39)
(39') is pivotally supported. Also, the above arm (36)
Insert the switching roller (40) in the position that holds the chino (32).
A motion transmission switching member such as (41) is supported by a shaft (42) C43
), and the roller C40) (4
1) moves, and the tight side and loose side followers (39) of the chaino (32) come into contact with the side edges (44) of the brackets (25) of the peg cylinders (11) at opposing positions.The side edges (44) As shown in FIG.
), when the cam follower (39) rotates, the cam follower (39) touches the circular arc surface (4).
4), the bracket (25) does not rotate and maintains the position shown in Fig. 2, and the cam follower (39) comes off the arcuate surface (44), that is, the bracket (
When it comes off from the bracket (25), the end face (45) of the bracket (25)
) The bracket (25) is rotated at a constant angle around the axis C24) to a position where it abuts the arcuate surface (37) of the fJi arm.

In addition, the slackness of the above-mentioned cheno, that is, the length, is as shown in Fig. 2,
That is, during normal weaving operation, the arm (36) is in the position shown and each roller (401 (41) is
When the arm (36) is pivoted and the arm or roller (40) (41) is moved to a position where one side of the chain is tensioned in a straight line, At least the length by which the peg cylinder (1) rotates forward or reverse by one pick is set by the rotation of the chino (32). Furthermore, the abutting position of the cam follower (39) of the arm C36) and the bracket (25) of the peg cylinder is such that when the arm turns during leveling, one chain is connected to the end of the bracket (25) and the cam follower (25) before the papier mache. The rotation of the shaft (34), that is, the rotation of the arm (36) until the bracket (25) is set in a position where the bracket (25) comes into contact with the arcuate surface of the arm (36),
This is done by an operating lever (46) fixed to the end of the shaft as shown in Figures 1 and 3, or by a shaft drive device (47) as shown in Figure 4. That is, the arm (36)
The operating lever C4 is attached to the end of the shaft (34) that is integrated with the
6), one end of the swing lever (48) is connected to the bolt (4).
9), and abutting members (51') (52) are fixed to the upper and lower surfaces of the other end of the swing lever (48), which sandwich and contact the outer peripheral surface of the eccentric cam (50). Ru. The eccentric cam (50) and the disc (53) are fixed to the output shaft (55) of the motor [54] in one direction. In addition, the disk C53) has four parts (56) on the extension line of the maximum diameter of the eccentric cam.
) are formed, and recesses (57) and (58) are also formed at points shifted by 900 degrees from the recess (56). moreover,
A microswitch (59) is provided on the outer peripheral surface of the disk (53).
) (60) are pressed against each other by springs (63) (64). Figure 4 shows a state in which the actuators (61, 62) of the four parts (57, 58) are pressed against each other by springs (63, 64). 61) and (62) are located respectively. Therefore, by the forward and reverse rotation of the motor (54), the eccentric cam (54)
By rotating the maximum diameter portion of the swing lever (48
) swings by an angle (θ1) or (θ2), and the shaft (
34) rotates by the same angle.

The operation of the device as described above will now be described.

In Fig. 1, during normal weaving operation, the operating lever [46
) is in position A, and the cam follower (
39) and the bracket (25) of the peg cylinder (1) are in contact with each other as shown in the figure, and the peg cylinder (1) is in the normal rotation position to control the displacement of the leading levers (6a) and (6b).

When the weft yarn is cut at VJ and the loom dobby machine is stopped, the weft yarn inserted next to the cut weft yarn is first pulled out, and then the operation lever (46) is swiveled to position B in FIG. 1. By turning the operation lever (46), the arm (36) integrated with the shaft (34) reaches the position shown in FIG. 5 (6), and the roller (41) moves to the negative side (3
2a') while pushing the arm (36) and racket (2a').
5) The position of the abutting part (39) on the two-dot chain line in Fig. 5 (B) (
39a) to the solid line position (39), and move to Cheno (32).
) is stretched on the negative side (32b). At this time Cheno (32)
Since the sprocket (31) on the drive shaft side does not rotate and is in a locked state, only the sprocket (32) on the peg cylinder (1) side reverses in the direction of the arrow (65), causing the Cheno C
32) will change the tension state of the peg cylinder (
1) is reversed by one pick. When the reverse inching switch of the loom is pressed in this state, the cut weft thread can be easily removed because the cut weft thread is inserted into the opened state with one shedding operation. At this time, that is, when the peg cylinder is returned to the reverse position, the arm (36) rotates clockwise around the axis (34) at an angle (θ1) as shown in FIG. 5 (b), and the bracket C25) The abutment part (39) moves along the arcuate surface (44) of the bracket C25), so the center of rotation C26 of the peg cylinder (1) moves.
) is the same position as the position during normal operation (scheme 5).

Also, when leveling all belt frames (not shown) to the same height, the lever (46
) is moved to position C, the arm (36) turns counterclockwise, rotates by an angle (θ2) as shown in FIG.

(C25), and the bracket (2
5) comes into contact with the arcuate surface (37) of the arm.

That is, at this time, the arm (36) can be rotated until the - side (32a) of the chino (32) is tensioned, but the arm can be rotated at least until the arm can be rotated to a position where the abutment part (39) is released. It is enough to rotate it.

At this time, the rotation axis (26a) of the peg cylinder (1) is shown in Fig. 5 (as shown in Q, the peg (2) moves away from the leading lever (6aM6b) by the dimension (g) compared to the normal rotation position (arrow (66)). The leading levers (6a) (6b) of all holding hooks move as shown in the lower lever (6b') in FIG.
) (5b) is positioned at the stopper (9a) (9N position) and takes a position not engaged with the movable hook (10aM10b), and the belt frame is positioned at a constant height position at the lower end or upper end.

Note that the shaft (34) is rotated by the device shown in FIG. 4.
In the third case, in case of reverse rotation, press the reverse rotation switch of the motor (54), rotate the eccentric cam (50) counterclockwise,
If the motor (54) is stopped at the position where the fourth part (C56) is engaged with the actuator (61) of the upper limit switch and notch (59), the lever (48) will rotate at an angle (o 1 ) of the shaft (34). ), and the arm C36) is in the state shown in FIG. 5(B).

On the other hand, in the case of leveling, push the normal rotation button of the motor [54] and move the eccentric cam (
50), lever C48) changes the angle (θ2)
The arm C36) rotates counterclockwise, and the arm C36) assumes the state shown in FIG. 50.

In addition, in Fig. 1, after removing the cut weft thread,
When entering normal operation, move the operating lever (46) to the reverse position (
By moving from b) to the normal rotation position ^, the peg cylinder (1) rotates by one pick to the normal rotation position. By pressing the start button of the loom in this state, operation will be restarted from the open state where the weft has been broken, and a normal weft will be inserted.

A structure connected to the structure before stopping is woven without the structure collapsing, and operation is resumed without fabric defects such as erudition and thick weaving in synchronization with the insertion of the weft yarn. .

In the above explanation, what is expressed as the looseness of the cheno is
In Figure 2, the chaino has a length that would cause the chaino (32) between the sprockets (28) and (31) to become loose if there were no switching rollers (4o) and (41). Yes, when driving, reversing or leveling, the cheno (32) uses rollers (40) (41).
Due to the pressing force, it is kept stretched without sagging. In other words, the length of the chino is sprocket (28') (31
), the distance between the axes (26) and (29), and the rotation of the peg cylinder for one pick are set from each condition that can be obtained by the movement of the arm (36), that is, the movement of the switching rollers C40 and C41. Ru.

Furthermore, although the contact of the switching roller (40M41) with the chino (32) is shown on the outside of the chino (C32) in the figure,
By arranging the rollers (40') and (41) on the outside of the chino (32), or by extending the arc of the bracket (25) to create a recess, the cam follower (39) fits into the recess during leveling, and the peg cylinder It is possible to make design changes such as making the bracket (25) in (1) moveable or using a timing belt instead of the chino (32).

As described above, in the present invention, an arm that can be pivoted about the - axis is brought into contact with a pivotable bracket that supports a peg cylinder, and the contact point is on a circular arc centered on the axis, and the above-mentioned When the peg cylinder is reversed by providing a motion transmission member that bends and reversely rotates the peg cylinder by at least one pick due to the pivoting movement of the arm,
The center of rotation of the peg cylinder can be at the same position as during normal operation, and therefore the displacement of the holding hook whose displacement is controlled by the peg of the peg cylinder is also the same as during normal operation, and the engagement between the holding hook and the movable hook is O that can securely fit the belt frame and stably open the belt frame.

[Brief explanation of drawings]

FIG. 1 is a schematic front view of the configuration of an example of a dobby machine to which an embodiment of the present invention is applied, FIG. 2 is an enlarged view of the same essential parts, and FIG.
The figure is a cross-sectional side view of the same main part, Figure 4 is a side view showing another example of the drive device for the arm (36), Figures 5 (5) to (q are the rotation of the arm, the state of the chino, and the rotation of the peg cylinder) ,
It is an explanatory diagram showing positioning, and the prisoner is during normal operation, 03)
0 is a diagram showing a state at the time of reversal and a state at the time of leveling.

Claims (1)

[Claims] A part of an arm that can be pivoted about the -axis is brought into contact with a pivotable bracket that supports a peg cylinder, and the abutting part is on a circular arc centered on the -axis, and the arm is pivotable. A reading device for a dobby machine, characterized in that the arm is provided with a motion transmission switching member for causing the peg cylinder to move forward or backward by at least one pick.