JPH08296144A - Dobby machine - Google Patents

Abstract

PURPOSE: To provide a dobby machine without requiring complicated operations in reverse rotating operations at the time of yarn breakage. CONSTITUTION: This dobby machine is obtained by installing a fluid cylinder 30 for shaking leading levers 17a and 17b separately and independently of driving devices 9 and 11 for shaking a poke plate 8 and a controller 50 capable of shaking the leading levers 17a and 17b with the fluid cylinder 30 in reverse rotating operations at the time of yarn breakage, etc., disengaging holding hooks 18a and 18b thereof from engaging hooks 15a and 15b of the poke plate 8 and then shaking the poke plate 8 with the driving devices 9 and 11 according to reverse motion in the dobby machine for engaging and disengaging the holding hooks 15a and 15b of the shaking poke plate 8 from the holding hooks 18a and 18b of the leading levers 17a and 17b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dobby machine for raising and lowering a heald frame of a loom.

[0002]

2. Description of the Related Art A dobby machine selectively raises or lowers a plurality of heald frames provided on a loom via wires. A side sectional view of the dobby machine is shown in FIG. As shown in the drawing, the same number of jack levers 2 as the number of heald frames are provided in the casing 1 so as to be rotatable around a rotation shaft 3. An end fitting 4 of a wire connected to each heald frame is attached to an end of the jack lever 2.

The jack lever 2 is connected to a dogleg lever 6 via a lever ratio adjusting arm 5. The V-shaped lever 6 has one end pivotally supported by the rotary shaft 7 and the other end pivotally supported by the center portion of the balk plate 8. The balk plate 8 is swingable by a locking arm 9.

The locking arm 9 has a slide groove 10 extending in its axial direction, and a guide block 12 loosely fitted to a cam shaft 11 is slidably fitted in the groove 10. A cam plate 13 is eccentrically fixed to the cam shaft 11, and cam followers 14 that come into contact with the cam surfaces of the cam plate 13 are provided on the locking arms 9 on both sides of the cam plate 13. The camshaft 11 rotates in conjunction with the loom.

According to this structure, when the cam shaft 11 rotates, the locking arm 9 reciprocates in the axial direction, and the balk plate 8 swings. Engaging hooks 15a and 15b are provided at both ends of the balk plate 8 so as to be rotatable around shafts 16a and 16b. The engaging hooks 15a and 15b are alternately moved by the swing of the balk plate 8 to alternately lead the levers 17a and 17b.
Are close to the holding hooks 18a and 18b.

The leading levers 17a and 17b are provided in a pair in the upper and lower directions, respectively, and pivot shafts 19a and 19b, respectively.
It is rotatably supported by b. Each of the reading levers 17a and 17b rotates according to the presence or absence of a peg 21 on the drum 20 as the card drum 20 rotates.
It may or may not rotate. The peg 21 is provided for each of the leading levers 17a and 17b.
Further, the card drum 20 rotates in conjunction with the camshaft 11.

According to the above construction, when the cam shaft 11 is rotated, the card drum 20 is rotated in synchronization with the swing of the balk plate 8. Here, when the holding hook 18a of the upper reading lever 17a is pushed and rotated by the peg 21 of the card drum 20 like the upper reading lever 17a in FIG. 9, the holding hook 18a of the upper reading lever 17a comes close to the engaging hook 15a of the balk plate 8. Engage with (working position). Then, the jack lever 2 is rotated by the swing of the balk plate 8, and the heald frame is raised.

On the other hand, the leading lever 17 on the lower side in the figure
In the portion of the card drum 20 where the peg 21 does not exist, the leading lever 17b is pulled by the spring 22, so that the holding hook 18b of the leading lever 17b engages with the engaging hook 15b of the balk plate 8 adjacent thereto. Nothing (non-acting position). Therefore, in this case, even if the balk plate 8 swings, the jack lever 2 does not rotate, and the heald frame remains lowered.

Thus, the peg 21 of the card drum 20 is
The engagement and disengagement of the holding hooks 18a and 18b and the engagement hooks 15a and 15b is determined depending on the presence or absence of the hook, and the woven pattern is determined.

[0010]

By the way, in the above-mentioned dobby machine, the driving of the locking arm 9 for swinging the balk plate 8 and the leading levers 17a, 17 are performed.
Since the drive of the card drum 21 for rocking b is interlocked, there are the following problems during reverse operation such as yarn breakage.

That is, when the operation is stopped due to thread breakage or the like, the holding hook 18a of the leading lever 17a and the engaging hook 15a of the balk plate 8 are engaged with each other like the upper leading lever 17a in FIG. Cage,
In addition, when the peg 21 of the card drum 20 is pressing the leading lever 17a, the leading lever 17a is stuck and the reverse operation cannot be performed (existence of the reverse rotation prohibited area).

In this case, the forward rotation is slightly advanced to advance the phase, and the engagement between the holding hook 18a of the leading lever 17a and the engagement hook 15a of the balk plate 8 is released (that is, after the outside of the reverse rotation prohibited area). ) A complicated operation of performing a reverse rotation operation based on the information before three picks was required.

Also, an electronic dobby using an electromagnetic magnet 100 as shown in FIG. 10 is known, instead of the mechanical dobby using the card drum 20 as described above (Japanese Patent Publication No. 3-27653). .

As shown in the figure, this electronic dobby has one end portion 101 of the leading lever 17a shown in FIG.
A slider 102 is provided on the action lever 104, and an action lever 104 having a guide groove portion 103 for guiding the slider 102 is pivotally supported on a rotating shaft 105.
04a, the electromagnetic magnet 100 is arranged, and the auxiliary cam 106 is provided so as to abut the leading portion 104b of the action lever 104. The auxiliary cam 106 is adapted to rotate in association with the rotation of the loom (that is, in conjunction with the camshaft 11 in FIG. 9). The electromagnetic magnet 100 includes the action levers 10
It is provided every four.

According to this structure, the action lever 104 is rotated by the rotation of the auxiliary cam 106, and the attracting portion 104a moves toward and away from the electromagnetic magnet 100. Therefore, the suction portion 104 of the action lever 104
When the electromagnetic magnet 100 is turned on when a approaches the electromagnetic magnet 100, the attraction portion 104a is attracted to the electromagnetic magnet 100 and the action lever 104 is held in that state. Then, the reading lever 17
The holding hook 18a of "a" engages with the engaging hook 15a of the balk plate 8, and the heald frame of the loom rises.

On the other hand, when the electromagnetic magnet 100 is off, the attraction portion 104a of the action lever 104 is not held by the electromagnetic magnet 100. Therefore, the holding hook 18a of the leading lever 17a does not engage with the engagement hook 15a of the balk plate 8, and the heald frame of the loom does not rise. Therefore, by giving each electromagnetic magnet 100 on / off information according to the woven pattern data, it is possible to woven a woven fabric having an arbitrary pattern.

By the way, when such an electronic dobby is operated in reverse, the loom is moved in reverse motion (which causes the auxiliary cam 106 to rotate in reverse), and information on the reverse operation of each electromagnetic magnet 100 ( On / off control will be performed by the information of 3 picks before).

However, when the attraction portion 104a of the action lever 104 is separated from the electromagnetic magnet 100 (that is, the base circular portion 106a of the auxiliary cam 106 is in contact with the leading portion 104a), the electromagnetic magnet 1
Even if 00 is turned on, the suction force is weak, so the suction unit 10
4a is not attracted to the electromagnetic magnet 100. Therefore,
Reverse operation cannot be performed. In addition, the suction part 104 which is separated
A strong electromagnetic magnet 100 may be used to attract a, but it is extremely difficult to realize it in consideration of heat generation and reliability.

Therefore, in such a case, the auxiliary cam 106 is rotated slightly forward (that is, the loom is moved in the forward direction), the cam crest portion 106b of the auxiliary cam 106 is brought into contact with the leading portion 104b, and the suction portion In the state where 104a is brought close to the electromagnetic magnet 100, the electromagnetic magnet 10
It is necessary to give on / off information to 0 (necessity of phase feed operation). Thus, even in the electronic dobby using the electromagnetic magnet 100, there is a reverse rotation prohibited area.

An object of the present invention devised in view of the above circumstances is to provide a dobby machine in which the reverse rotation prohibited area is made small and a complicated operation is not required at the time of reverse rotation operation such as yarn breakage.

[0021]

To achieve the above object, a first invention is a dobby machine for engaging and disengaging an engaging hook of a swinging balk plate and a holding hook of a leading lever. A fluid cylinder for oscillating the leading lever is provided independently of the drive device for oscillating.

A second invention is a dobby machine for engaging and disengaging an engaging hook of a swinging balk plate and a holding hook of a leading lever, independently of a drive device for swinging the balk plate. A fluid cylinder for swinging the leading lever is provided, and during reverse operation such as thread breakage, the leading lever is swung by the fluid cylinder to disengage its holding hook from the engaging hook of the balk plate, and then the drive device Thus, a controller for swinging the balk plate in reverse motion is provided.

A third aspect of the present invention is a pair of leading levers for determining the up and down movement of the heald frame, a switching lever for alternately engaging and holding the pair of leading levers, and the leading lever in the operating / non-operating position. Equipped with a fluid cylinder to operate, during reverse operation such as thread breakage,
In the reverse rotation prohibited area where the switching lever releases the engagement of the leading lever, a controller for activating the fluid cylinder is provided based on the information of two picks before, and the other three picks before.

[0024]

According to the structure of the first invention, since the fluid cylinder for swinging the leading lever is provided independently of the drive device for swinging the balk plate, the fluid cylinder directly swings the leading lever. Then, after the holding hook of the leading lever and the engagement hook of the balk plate are disengaged, the free balk plate can be swung in reverse motion by the drive device. Therefore, the reverse rotation prohibited area is significantly smaller than that of the conventional mechanical dobby or electronic dobby using an electromagnetic magnet.

According to the structure of the second invention, during reverse operation such as thread breakage, the controller drives the fluid lever after swinging the leading lever to disengage its holding hook from the engaging hook of the balk plate. The device swings the balk plate in reverse motion. Therefore, the reverse rotation prohibited area is significantly reduced, and the sticking of the leading lever, which has been a problem in the past, can be avoided.

According to the structure of the third aspect of the present invention, during reverse rotation operation such as yarn breakage, the controller operates the fluid cylinder based on the information of 2 picks before the reverse rotation prohibition area and 3 picks before the other areas. It eliminates the need for complicated operations such as phase feed, and always provides an appropriate opening during reverse operation.

[0027]

An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a side sectional view of the dobby machine according to this embodiment. As shown in the figure, this dobby machine is shown in FIG.
Since the basic configuration is the same as that of the dobby machine shown in (1), common parts are given common part numbers and their description is omitted.

In FIG. 1, 2 is a jack lever, 5 is a lever ratio adjusting arm, 6 is a L-shaped lever, 8 is a balk plate, 15a and 15b are engaging hooks, and 17a and 17b are leading levers. The balk plate 8 is swung by a locking arm 9 (see FIG. 9) which is slidably reciprocated by a cam shaft 11. These camshaft 11 and locking arm 9
Corresponds to the driving device in the claims.

Since the leading levers 17a and 17b are provided symmetrically with respect to each other, only the upper lever 17a will be described. The leading lever 17a is a leading portion 32a with which the peg 31 of the pneumatic cylinder 30 abuts.
And a hook arm body 34a having a holding hook 18a that engages with the engagement hook 15a of the balk plate 8. These lead arm body 33a and hook arm body 34a are
It is integrated by the spring 40a.

The upper and lower hook arm bodies 34a, 34b are
A biasing force is applied by the second spring 41 so as to be attracted to each other, and the stoppers 42a,
It abuts against 42b. Second spring 4
The spring force of 1 is weaker than the spring force of the first springs 40a and 40b. Therefore, the lead arm body 33a and the hook arm body 34a are integrated by the first spring 40a having a strong spring force, and the second spring 41 having a weak spring force expands and contracts to integrally rotate around the rotating shaft 19a. Rotate.

Upper and lower reading levers 17a, 17b
The lead arm bodies 33a and 33b are configured such that the leading portions 32a and 32b thereof are pressed by the peg 31 of the pneumatic cylinder 30. Pneumatic cylinder 30
As shown in FIG. 7, expansion / contraction is controlled by a solenoid valve 51 that opens and closes in response to a signal from the controller 50 (a signal corresponding to the weave pattern), and is driven independently of the camshaft 11. The leading portion 32a of the lead arm body 33a of the leading lever 17a is connected to the controller 5
The woven pattern information transmitted from 0 to the pneumatic cylinder 30 is read.

As shown in FIG. 6, the pneumatic cylinder 30 includes a leading lever 1 in which a plurality of horizontal cylinders are arranged side by side.
They are arranged in a staggered pattern above and below 7a and 17b.
The pneumatic cylinder 30 needs to have a constant diameter in consideration of the required pressing power. If the pneumatic cylinders 30 are arranged in a single row rather than in a staggered manner, the interval X between the adjacent leading levers 17 becomes wider, and the device cannot be made compact. Because.

Further, the pneumatic cylinder 30 is configured to push a pair of upper and lower leading levers 17a and 17b together. Similarly, it is impossible to reduce the diameter of the pneumatic cylinder 30 so as to press each of the leading levers 17a and 17b one by one because of the pressing power. In this way, one pneumatic cylinder 3
Since the pair of upper and lower reading levers 17a and 17b are pushed together at 0, the upper and lower reading levers 17a and 17b
A switching mechanism that alternately switches and uses b is required.
These are the switching levers 60a and 60b described later.

Now, the peg 31 of the pneumatic cylinder 30 shown in FIG. 1 is the lead arm body 3 of the leading lever 17a.
When the leading portion 32a of 3a is pressed, the lead arm body 33a is integrated through the first spring 40a.
The leading lever 17a composed of the hook arm body 34a and the hook arm body 34a integrally rotates around the rotation shaft 19a. Then, the hook arm body 34a is separated from the stopper 42a, and the second spring 41 is extended.

At this time, when the engaging hook 15a of the balk plate 8 which swings at a constant cycle by the rotation of the camshaft 11 approaches the holding hook 18a of the hook arm body 34a of the leading lever 17a, the engaging hook 1
5a rides on the holding hook 18a and these are engaged (operating position). At the time of riding, since the lead arm body 33a is pressed by the peg 31 of the pneumatic cylinder 30, the hook arm body 34a extends against the first spring 40a and slightly rotates to achieve the engagement. (The state of the engaging hook 15b and the holding hook 18b on the lower side of FIG. 1).

A notch 35a is formed in the lead arm body 33a of the leading lever 17a. The notch 35a has a hook portion 6 of the switching lever 60a.
1a is designed to be disengaged. A pair of upper and lower switching levers 60a and 60b are used for alternately switching the upper and lower reading levers 17a and 17b, and are urged by the third spring 62a to be rotated about the rotating shaft 63a. The hook portion 61a is biased toward the cutout portion 35a of the leading lever 17a.

The switching lever 60a is a shifter cam 70a.
Is rotated about the shaft 63a and is periodically swung. That is, when the cam crest of the shifter cam 70a rides on the cam follower 64a of the switching lever 60a, the hook portion 61a of the switching lever 60a separates from the cutout portion 35a of the leading lever 17a, and otherwise, the hook portion 61a of the switching lever 60a leads. The lever 17a is pressed near the notch 35a.

In this pressed state, when the peg 31 of the pneumatic cylinder 30 presses the leading portion 32a of the lead arm body 33a of the leading lever 17a, the pushing force causes the leading lever 17a to rotate about the rotating shaft 19a. In order to rotate the switch lever 60a into the cutout portion 35a of the leading lever 17a, the hook portion 6 of the switching lever 60a
1a is engaged. Then, the peg 3 of the pneumatic cylinder 30
Even when 1 is retracted, the leading lever 17a is self-held by the hook portion 61a of the switching lever 60a.

Self-held leading lever 17a
Is canceled as follows. That is, when the shifter cam 70a rotates and its cam crest comes into contact with the cam follower 64a of the switching lever 60a, the switching lever 60a rotates about the rotation shaft 63a, and the hook portion 61a of the switching lever 60a moves to the leading lever 17a. It is separated from the cut portion 35a. If the pneumatic cylinder 30 is contracted at the time of this detachment, the hook arm body 34a of the leading lever 17a is pulled by the second spring 41 and is in contact with the stopper 42a (inactive position).

The upper and lower shifter cams 70a and 70b are meshed with a gear 81 provided on the cam shaft 11 via a gear 80, and rotate in conjunction with the cam shaft 11. That is, the upper and lower switching levers 60a, 6
0b and the balk plate 8 are interlocked at a fixed cycle. Moreover, the cam peaks of the upper shifter cam 70a and the lower shifter cam 70b are 180 degrees out of phase with each other. Therefore, the upper and lower reading levers 17a and 17b are alternately selected and used by the upper and lower shifter cams 70a and 70b.

In the dobby machine, when the holding hook 18a of the leading lever 17a and the engaging hook 15a of the balk plate 8 which are stopped during the reverse rotation operation such as the thread breakage are engaged, the air pressure is increased. The cylinder 30 swings the leading lever 17a to hold the holding hook 1
A controller 50 is provided which, after removing 8a from the engaging hook 15a of the balk plate 8, reversely rotates the camshaft 11 to swing the balk plate 8 in a reverse motion (see FIGS. 7 and 8).

According to the dobby machine having the above construction, the controller 50 controls the pneumatic cylinder 3 during reverse rotation operation such as yarn breakage.
Peg 31 of 0 directly leads to the leading lever 17a, 1
After swinging 7b to disengage the holding hooks 18a, 18b from the engaging hooks 15a, 15b of the balk plate 8, the balk plate 8 which is disengaged and becomes free is rotated by the cam shaft 11 in the reverse direction. Swing in reverse motion. As a result, the problem of sticking of the leading lever 17 (the problem of the reverse rotation prohibited area), which has been a problem in the past, is solved. FIG. 2 shows a timing chart of this dobby machine. As shown in the figure, even if the controller 50 transmits the opening / closing information (texture information) to the solenoid valve 51, it does not immediately appear in the rotation of the jack lever 2 (that is, the elevation of the heald frame). For example, when the controller 50 transmits the information 100 of the n-th pick to the solenoid valve 51, the shifter cam 70 switches the switching lever 60, and then the jack lever 2 is delayed by one phase as shown by an arrow 101 in FIG. It is transmitted. This is called advance read-ahead in Dobby machines.

That is, to the solenoid valve 51 for operating the pneumatic cylinder 30, the information one pick before is always transmitted. At this time, if the information indicates that the pneumatic cylinder 30 is to be projected, the peg 31 of the pneumatic cylinder 30 projects to directly press the leading lever 17 to rotate the leading lever 17, and the notch 35 of the hook of the switching lever 60. The part 61 is engaged and self-held. Then, the engaging hook 15 of the balk plate 8 that swings at a constant cycle engages with the holding hook 18 of the leading lever 17, and the jack lever 2 rotates. Then, because of such a process, the information of the solenoid valve 51 appears on the jack lever 2 with a delay of one pick.

By the way, during reverse operation such as yarn breakage, information from three picks is transmitted from the controller 50 to the solenoid valve 51 in principle. For example, when the vehicle is stopped in the area A in FIG. 2 due to a thread breakage or the like and the reverse operation is performed from that area, the information 102 of n + 2 has already been transmitted to the solenoid valve 51, and therefore the information of three picks before is transmitted. . As a result, the solenoid valve is actuated based on the information of n-1, and pre-reading (reading one pick before) at the time of reverse operation is achieved.

However, in the case of stopping in the area B in FIG. 2, the controller sends the information two picks before to the solenoid valve. In the area B, the information 103 of n + 1 is added to the solenoid valve 51.
Is sent, so by subtracting 2
This is because the information becomes -1 and the pre-reading at the time of reverse operation is achieved. The area B is the “conventional technology” described above.
The reverse rotation prohibition region described in the column and the “Problem to be solved by the invention” column, and matches the phase of the cam crest of the shifter cam 70. That is, in the reverse rotation prohibited area (area B), the engagement between the switching lever 60 and the leading lever 17 is released.

As described above, in the dobby machine according to the present embodiment, the pair of leading levers 17a and 17b for determining the lifting and lowering of the heald frame and the switching for alternately engaging and holding the pair of leading levers 17a and 17b. Lever 60a, 60b and leading lever 17a, 17
The switching lever 60 is provided with a fluid cylinder 30 for actuating b to the working / non-working position during reverse rotation operation such as yarn breakage.
a. A controller 50 is provided which operates the fluid cylinder 30 based on information before two picks in the reverse rotation prohibited area (region B) where 60b releases the engagement of the leading levers 17a and 17b, and in other cases before three picks.

Specifically, as shown in FIG. 3, a forward rotation side flange portion 80 and a reverse rotation side flange portion 81 are attached to the camshaft 11 so as to partially overlap each other. These collar parts 80, 8
No. 1 is attached so that the overlapping area thereof coincides with the above-described reverse rotation prohibition area B. Protrusions and depressions of the collar portions 80 and 81 are detected by the proximity sensors 83 and 84 shown in FIG. 4, respectively. According to this configuration, as shown in FIG. 5, when both the proximity sensors 83 and 84 are both ON signals, it can be determined that they are stopped in the overlapping area B (reverse rotation prohibiting area B).

The information of the proximity sensors 83 and 84 is transmitted from the dobby to the controller 50 as shown in FIG. When the controller 50 receives the signal of the overlapping area B (reverse rotation prohibition area B), it sends the minus 2 pick information to the solenoid valve 51 of the Dobby, and when it receives the other signals, the minus 3 pick information is sent to the solenoid valve of the Dobby. Send to 51. As a result, the preceding read-ahead during the reverse rotation operation described above is always properly achieved regardless of whether it is in the reverse rotation prohibition region B or not.

According to this configuration, during reverse rotation operation such as yarn breakage, the controller 50 operates the fluid cylinder based on the information of two picks before in the reverse rotation prohibited area B and three picks before the rest. The complicated work such as the phase feed which has been performed conventionally is unnecessary, and an appropriate opening can always be obtained during the reverse rotation operation.

[0051]

In summary, according to the dobby machine of the present invention, the reverse rotation prohibition region, which was conventionally inevitable during reverse rotation operation such as yarn breakage, is eliminated, and complicated operations such as phase feeding are not required and operability is improved. improves.

[Brief description of drawings]

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

FIG. 2 is a diagram showing a timing chart of the dobby machine.

FIG. 3 is a side view of a cam shaft of the dobby machine.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

5 is an output diagram of the proximity sensor in FIG.

FIG. 6 is a diagram showing an arrangement of pneumatic cylinders as fluid cylinders.

FIG. 7 is a sectional view of the pneumatic cylinder.

FIG. 8 is a diagram showing a relationship between a dobby and a controller.

FIG. 9 is a side sectional view of a conventional Dobby machine.

FIG. 10 is a partially enlarged view of an electronic dobby showing another conventional example.

[Explanation of symbols]

 8 Boke Plate 9, 11 Drive Device 15 Engagement Hook 17 Leading Lever 18 Holding Hook 30 Fluid Cylinder 50 Controller 60 Switching Lever

Claims (3)

[Claims] 1. A dobby machine for engaging and disengaging an engaging hook of a swinging balk plate and a holding hook of a leading lever, the swinging of the leading lever independently of a drive device for swinging the balk plate. A dobby machine provided with a fluid cylinder for moving. 2. A dobby machine for engaging and disengaging an engaging hook of a swinging balk plate and a holding hook of a leading lever, the swinging of the leading lever independently of a drive device for swinging the balk plate. A fluid cylinder for moving is provided, and during reverse operation such as yarn breakage, the leading lever is swung by the fluid cylinder to disengage its holding hook from the engagement hook of the balk plate, and then the boke plate is reverse-moved by the drive device. A dobby machine that is equipped with a controller that swings at. 3. A pair of leading levers for deciding up / down movement of the heald frame, a switching lever for alternately engaging and holding the pair of leading levers, and a fluid cylinder for actuating the leading levers in a working / non-working position. A controller is provided to operate the fluid cylinder according to information before two picks in the reverse rotation prohibited area where the switching lever releases the engagement of the leading lever during reverse operation such as yarn breakage, and in other cases other than three picks. Characteristic Dobby machine.