JP2003113548A - Aperture adjustment device for opening device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To adjust the reciprocating movement amount of a heald, that is, to adjust the shedding amount of a warp more easily. A drive source (3) is provided for each of a plurality of heald frames (2), and movement of the drive source (3) is controlled by a link mechanism (17).
The reciprocating motion of the heddle 2 is changed by changing the lever ratio b / a of the swing lever 5 constituting the link mechanism section 17 to adjust the reciprocating movement amount of the heddle 2, that is, the opening of the warp. In the opening amount adjusting device of the apparatus 1, the reciprocating motion amount of the drive rod 4 for each of the integrated frames 2 is made different between at least two healds 2 and the heddle 2 having a large opening amount.
The reciprocating momentum of the drive rod 4 of the heald 2 with a small opening
Is set to be greater than or equal to the reciprocating momentum of the drive rod 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for adjusting the amount of reciprocating movement of a heddle frame, that is, the amount of warp opening in a shedding device for a loom.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication No. 9-111576 discloses a shedding device for a loom. The opening device is electrically driven and has a drive motor for each heald frame. The rotary motion of the drive motor is converted into a reciprocating motion by a crank mechanism, and this reciprocating motion is transmitted to the corresponding heald frame as an opening motion. .

Usually, a plurality of heald frames are arranged so as to overlap each other in the warp direction. The amount of reciprocating movement of each heddle is smaller on the weaving side and larger on the sending side in order to keep the opening angles of all warps constant. For this reason,
Regarding the heddle on the weaving side and the feeding side, the required reciprocating movement amount is the positional relationship of the lever ratio changing member that is positionally adjustable with respect to the swing lever that constitutes the crank mechanism (lever / crank mechanism). Is set to change the lever ratio of the rocking lever to set.

After the reciprocating movement amount of each heddle is set, the reciprocating movement amount of each heddle, that is, the opening amount of the warp is adjusted in the same manner as the setting of the reciprocating movement amount of each heddle. This is done by changing the mounting position of the lever ratio changing member, changing the distance between the engagement pin of the lever ratio changing member and the pivot of the rocking lever, and changing the lever ratio of the rocking lever.

[0005]

However, in the above-mentioned prior art, since the lever ratio of the rocking lever is different between the weaving side rocking lever and the feeding side rocking lever, the warp thread opening amount is adjusted. Sometimes, the amount of adjustment of the reciprocating movement of the heddle (the amount of adjustment of the opening amount of the warp) with respect to the amount of change in the mounting position of the lever ratio changing member differs between the cloth fell side and the sending side. Therefore, the amount of adjustment of the opening amount of the warp must be adjusted in consideration of the above differences, and requires skill. In particular, when the lever ratio changing member is close to the pivot shaft of the swing lever, a slight change in the mounting position of the lever ratio changing member causes a large change in the reciprocating movement of the heddle. , Even for the skilled person.

Therefore, an object of the present invention is to make it easier to adjust the amount of reciprocal movement of the heddle, that is, the amount of opening of the warp.

[0007]

According to the present invention, there is provided a drive source for each of a plurality of heald frames, and the movement of the drive source is controlled by a link mechanism portion. In the opening amount adjusting device of the shedding device for converting the reciprocating movement of the heddle, that is, the opening amount of the warp, by changing the lever ratio of the swinging lever that constitutes the link mechanism portion, The reciprocating momentum of the drive rod for each frame is made different for at least two healds, and the reciprocating momentum of the heddle driving rod with a large opening amount is greater than or equal to the reciprocating momentum of the heddle driving rod with a small opening amount. It is set.

Further, according to the present invention, in claim 2, the reciprocating motion amount of the drive rod constituting the link mechanism portion is set in proportion to the reciprocating movement amount of the heddle, that is, the opening amount of the warp.

[0009]

1 and 2 show an opening device 1 according to the present invention. In the opening device 1, a plurality of, for example, 16 heald frames 2 are driven via a link mechanism section 17 and a heddle rod 6 by a drive motor 3 such as a servomotor provided for each heald frame 2 to open. Do exercise.

The 16 drive motors 3 are fixed by brackets 8 on the outer side of one of the pair of left and right loom frames 7, and the rotational movement of their output shafts 9 is controlled by the crankshaft 10 and the drive rod. It is transmitted as a reciprocating rotary motion to one of the pair of swing levers 5 via 4.
Here, the crankshaft 10, the drive rod 4, and the swing lever 5 connected thereto constitute a link mechanism portion 17 together with the loom frame 7 and the bracket 8 integrated with the loom frame 7. In this example, the link mechanism unit 17 is a lever / crank mechanism.

The pair of swing levers 5 are rotatably supported on the left and right loom frames 7 by a bracket 8a and a support shaft 11, and are connected by a connecting rod 12 and connecting pins 13 at both ends thereof. The same direction and the same amount of reciprocating rotary motion. Of the pair of swing levers 5,
The swing lever 5 on the drive side includes a lever ratio changing member 15 whose position can be adjusted by an adjusting bolt 15a, and is pivoted to one end of the drive rod 4 via a drive side engaging pin 14 of the lever ratio changing member 15. Connected as possible.

The reciprocating rotational movement of the pair of rocking levers 5 is caused by the heddle frame side engagement pin 16, the heald frame rod 6 and the engagement pin 1.
It is converted into a vertical reciprocating linear motion by 6a, and an opening motion is given to the corresponding heddle frame 2. In addition, each heddle frame 2 is
It is supported by a guide 7a integral with the loom frame 7 so as to be movable in the direction of the shedding motion.

Next, FIGS. 3, 4 and 5 show the mounting portions of the link mechanism portion 17 and the crankshaft 10 of the opening device 1, respectively. A crankshaft holder 18 having a predetermined eccentricity e is attached to the output shaft 9 of each motor by, for example, a split tightening bolt 18a, and the crankshaft 10 is fixed to the crankshaft holder 18 by a bolt 19. A crankshaft engaging end portion 21 of the drive rod 4 is rotatably connected to the crankshaft 10 via a ball bearing 20.

According to the present invention, in the above-described shedding device 1, the reciprocating motion amount of the drive rod 4 constituting the link mechanism portion 17 for each heald frame 2 is made different by at least two heddles 2 and the warp shed is opened. The reciprocating momentum of the driving rod 4 of the large heddle 2 is made larger than the reciprocating momentum of the driving rod 4 of the small heddle 2, and further, all heddle 2
The lever ratio of the rocking lever 5 corresponding to is set to be substantially equal. Further, according to the present invention, the amount of reciprocating motion of the drive rod 4 constituting the link mechanism portion 17 is approximately proportional to the amount of reciprocating movement of the heddle 2, that is, the amount of warp opening.

Table 1 shows the numbers (No. 1 to N) of each heddle frame 2.
o. 16) Corresponding relations between the reciprocating movement amount, that is, the warp opening amount [mm], the eccentric amount e [mm], and the lever ratio are shown. The lever ratio of the swing lever 5 is (the swing lever 5
Between the support shaft 11 and the drive side engagement pin 14 a) /
(Distance b between the support shaft 11 of the swing lever 5 and the heddle-side engagement pin 16), and is expressed as a / b. here,
Number No. of the heddle frame 2 No. 1 of the heddle frame 2 is the cloth fell side (small opening amount). 16 is the delivery side (large opening amount). In addition, in this example, the distance b is the same in all healds 2.

[0016]

[Table 1]

As is clear from Table 1 above, when the number (No. 1 to No. 16) of each heddle frame 2 increases, the reciprocating movement amount of the heddle frame 2, that is, the opening amount of the warp, correspondingly increases. , And the amount of eccentricity e is set to be large in proportion to this. In this way, the drive rod 4
The amount of reciprocating motion of is the eccentric amount e × 2, which is approximately proportional to the amount of reciprocating movement of the heddle 2, that is, the opening amount of the warp. Moreover, the reciprocating momentum of the drive rod 4 is different in at least two healds 2 due to the setting of the magnitude relation of the eccentricity e, and the reciprocating momentum of the drive rod 4 of the heddle 2 having a large warp opening is Is larger than or equal to the reciprocating momentum of the drive rod 4 of the heddle 2 having a small opening amount.

As shown in Table 1 above, if the eccentric amount e is set for every two adjacent heddles 2 in proportion to the amount of reciprocal movement of the heddle 2, that is, the opening amount of the warp, the reciprocation of the drive rod 4 is set. The momentum is almost proportional to the amount of reciprocal movement of the heddle 2, and the lever ratio a / b of the rocking levers 5 corresponding to all heddles 2 is a / b.
Can be approximately constant.

As a result, the lever ratio a / b of the oscillating lever 5 becomes substantially constant between the oscillating lever 5 on the cloth fell side and the oscillating lever 5 on the feeding side, so that the lever is adjusted when adjusting the shed amount of the warp threads. The adjustment amount of the reciprocating movement amount of the heddle 2 with respect to the attachment position change amount of the ratio changing member 15, that is, the adjustment amount of the opening amount of the warp is not different between the cloth fell side and the sending side, and is substantially constant. Therefore, when adjusting the mounting position of the lever ratio changing member 15 with respect to the swing lever 5, even an unskilled person can easily adjust or finely adjust the opening amount of the warp.

In particular, since the reciprocating motion amount of the drive rod 4 is almost proportional to the reciprocating movement amount of the heddle 2, the lever ratio changing member 15 having the drive side engaging pin 14 and the lever ratio changing member 15 are supported in all heddles 2. It becomes possible to make the distance from the shaft 11 a sufficient length, and by doing so, it becomes necessary to greatly change the position of the lever ratio changing member 15 for fine adjustment of the opening amount of the warp. The fine adjustment of the opening amount becomes accurate and easy.

Further, the heddle 2 having a larger warp opening amount has a larger load during movement and requires a corresponding torque for the drive motor 3, but the eccentricity e is increased in proportion to the warp opening amount. For example, the force applied to the drive rod 4 does not increase so much despite the large torque of the drive motor 3. Therefore, even with the heddle 2 having a large warp opening amount, the drive rod 4 is hardly damaged.

The eccentricity e in Table 1 is, for example,
No. Eccentricity e = 34 [mm], number No. 1 to 8 The eccentricity e = 47 [mm] may be set to 9 to 16 and the number No. of the heddle 2 is No. 1 for eccentricity e = 3
4 [mm] and others with eccentricity e = 47 [mm], or the number No. 2 of heddle 2 Eccentricity e = 1 to 15
34 [mm], No. Eccentricity e = 37 [m
m] can also be set.

Further, as shown in FIG. 6, the lever ratio changing member 15 is a member having a heddle side engaging pin 16,
The swing lever 5 may be attached to the output side arm so as to be positionally adjustable, and the heald side engaging pin 16 may be connected to the heald rod 6. The method of finely adjusting the opening amount of the warp threads is the reverse of the previous example, and the opening amount is increased by increasing the distance between the lever ratio changing member 15 and the support shaft 11. A lever ratio changing member 15 is also attached to the swing lever 5 on the driven side in a positionally adjustable manner.

Further, as shown in FIG. 7, the rotational movement of the drive motor 3 is transmitted to the cam 22 as a cam mechanism regardless of the crank mechanism (crankshaft holder 18).
The cam follower 23 and the cam lever 24 contacting with 2 may be converted into the reciprocating motion of the drive rod 4. Here, the cam lever 24 is rotatably supported at a fixed position by a lever shaft 25, and is biased by a pulling spring 28. In addition,
The amount of reciprocating motion of the drive rod 4 can also be adjusted by changing the insertion position of the adjusting pin 27 into the plurality of holes 26 at the tip of the cam lever 24.

Of course, the drive source may be a linear motor. In the case of a linear motor, the output momentum of the linear motor (reciprocating momentum of the drive rod 4) is set by electrical control of the linear motor. Further, the shedding device 1 may be provided on both left and right sides of the loom 1 in a divided state.

[0026]

According to the first aspect of the present invention, the reciprocating momentum of the drive rod is different in at least two heald frames, and in all heddles, heddles having a large opening amount are more effective than heddles having a small opening amount. Greater than or equal to, so at least 2
In one heddle, the reciprocal movement amount of the heddle having a large opening amount is larger than the reciprocating movement amount of the heddle having a small opening amount. Therefore, compared to the case where the reciprocating motion amount of the drive rod is the same as in the conventional case, it is not necessary to greatly change the lever ratio, and the distance between one engagement pin and the support shaft for changing the lever ratio is large. Not changed Therefore, in either a heddle with a large opening amount or a heddle with a small opening amount, the distance between one engagement pin and the support shaft becomes small, and the lever ratio is greatly changed by adjusting a slight distance, and the warp opening amount is finely adjusted. Adjustment is not difficult.

On the other hand, according to the prior art, as described above, in either the heddle with a large opening amount or the heddle with a small opening amount, one dowel pin serves as a support shaft when adjusting the opening amount of the warp threads. It gets closer and it becomes difficult to make fine adjustments. When one of the engagement pins is connected to the drive rod, fine adjustment is difficult in a heddle with a large opening amount. On the contrary, when one engagement pin is engaged with the heddle rod, it is difficult to finely adjust the heddle with a small opening amount.

According to the second aspect, since the reciprocating motion amount of the drive rod is approximately proportional to the reciprocating motion amount of the heddle, that is, the warp opening amount, the lever ratio of the rocking lever can be made substantially constant. By selecting an appropriate lever ratio,
In all the heirds, the distance between one of the engagement pins and the support shaft can be set to a sufficient length, which facilitates fine adjustment of the opening amount.

[Brief description of drawings]

FIG. 1 is a front view of an opening amount adjusting device of an opening device according to the present invention.

FIG. 2 is a plan view of a main part of an opening amount adjusting device for an opening device according to the present invention.

FIG. 3 is an enlarged front view of a link mechanism section.

FIG. 4 is an enlarged front view of a crankshaft holder portion.

FIG. 5 is an enlarged cross-sectional view of a crankshaft holder portion.

FIG. 6 is an enlarged front view of another link mechanism portion.

FIG. 7 is an enlarged front view of another link mechanism portion.

[Explanation of symbols]

1 opening device 2 heddle frame 3 drive motor 4 drive rod 5 Swing lever 6 heddle frame rod 7 Loom frame 7a guide 8 brackets 8a bracket 9 Output shaft 10 crankshaft 11 spindles 12 Connecting rod 13 Connection pin 14 Drive side engagement pin 15 Lever ratio changing member 15a Adjustment bolt 16 Heald frame side engagement pin 16a engagement pin 17 Link mechanism section 18 Crankshaft holder 18a Split tightening bolt 19 Volts 20 ball bearing 21 Crankshaft engaging end 22 cam 23 Cam Follower 24 Cam lever 25 lever shaft 26 holes 27 Adjustment pin 28 Pulling spring

Claims (2)

[Claims] 1. A plurality of heddle frames each have a drive source, and the motion of the drive source is converted into a reciprocating motion of a heddle by a link mechanism section, and a lever ratio of a swing lever constituting the link mechanism section. In the opening device for adjusting the reciprocating movement amount of the heddle, that is, the warp yarn opening amount, the reciprocating motion amount of the drive rod for each heddle frame is at least 2
The opening adjusting device of the opening device is characterized in that the reciprocating momentum of the driving rod of the heddle having a large opening amount is larger than or equal to the reciprocating momentum of the driving rod of the heddle having a small opening amount. . 2. The opening amount adjusting device for an opening device according to claim 1, wherein the reciprocating motion amount of the drive rod constituting the link mechanism portion is made substantially proportional to the reciprocating movement amount of the heddle.