JP3407374B2 - Loom shedding device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shedding device for a loom, and more particularly to a shedding device for a loom that positively drives a heddle frame of the loom.

[0002]

2. Description of the Related Art In a conventional shedding device for a loom, a cam is used to convert a rotary motion into a linear motion (see, for example, Japanese Utility Model Laid-Open No. 59-9090). That is, as shown in FIG. 3, the heald frame 3 is formed by the cam 2 fixed to the drive shaft 1 driven by the drive source of the loom.
Cam lever 4 having cam followers 4a, 4a, connecting plate 5, trade lever 6, connecting bar 7, angle lever 8, connecting rod 9
It is driven via a transmission member such as. In addition, 10 is a pivot and 11 is a pivot part.

In such a loom shedding device using a cam, the cam must be replaced when changing the type of woven cloth, and the cam and the loom drive section must be connected to change the timing of the loom. I had to shift it. The opening amount and the height of the heddle frame may be changed by changing the position of the transmitting member, for example, the connecting plate on the cam lever,
Alternatively, the length of the connecting rod is changed.

The movement of the heddle frame is determined by the shape of the cam, and the adjustment of the opening amount, the timing of the loom, the height of the heddle frame, etc. due to the change of the cam is performed by a long work based on conventional experience. Was there.

Therefore, in order to solve the problem of the opening device by such a cam, it is already proposed that guide frames are provided on both the left and right sides of the heald frame and the opening movement is performed by a linear motor (JP-A-59-59). No. 192749).

However, in the opening device using the linear motor, not only is there a risk that adjacent linear motors may interfere with each other to generate heat, but it is difficult to synchronize the linear motors on both sides, and there is inertial force. However, there is a problem that it is very difficult to use.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the problems of the conventional loom shedding device, and to provide a weaving machine shedding device that does not generate heat, noise, and vibrations and that allows easy change of the type of woven fabric.

[0008]

In order to achieve the above object, the present invention relates to a shedding device for a loom, in which a ball screw is rotatably installed in a support box disposed on the side of a heddle frame to support the support. The ball screw is integrally connected to a rotary shaft of a variable speed motor arranged outside the box and controlled by a control device, and a pair of driven nuts are screwed to the ball screw via balls and the pair of driven nuts are screwed together. Are urged toward each other by a tightening mechanism to convert the rotary motion of the variable speed motor into a linear motion of the driven nut, and one end of the heald frame is connected to both ends in the longitudinal direction of the heald frame through levers, rods, etc. The other end of the swingable trader lever and the driven nut are connected via a link, and the linear motion of the driven nut is converted into the swinging motion of the trader lever to transmit the opening motion to the heddle frame. Than it is.

Further, the heddle frame and / or the transmission member,
It is preferable to provide a biasing means that acts to push up the heddle frame.

[0010]

The opening device of the loom is rotatably installed with a ball screw in a support box disposed on the side of the heddle frame, and a rotation of a variable speed motor is provided outside the support box and controlled by a controller. The ball screw is integrally connected to the shaft, a pair of driven nuts are screwed to the ball screw via balls, and the pair of driven nuts are urged toward each other by a tightening mechanism so as to move the variable speed motor. The rotary motion is converted into the linear motion of the driven nut, and the other end of the swingable trader lever whose one end is connected to both ends in the longitudinal direction of the heald frame via a lever or a rod is linked to the driven nut. Since the linear motion of the driven nut is converted into the swing motion of the trader lever to transmit the opening motion to the heddle frame, the speed of the variable speed motor is controlled by the weaving motion of the loom. One Controller can be controlled by the change of the woven fabric, can also be easily and quickly respond to changes in the weft and weaving width as. If a heddle frame and / or a motion transmitting member for the heddle frame or both of them are provided with an urging means that acts to push up the heddle frame, the influence of the weight when the heddle frame is moved up and down is excluded. You can

[0011]

EXAMPLE A shedding device for a loom, which is an example of the present invention, will be described below. In the drawings, the same or corresponding parts are designated by the same reference numerals.

In FIG. 1, reference numeral 12 is a variable speed motor, and its rotary shaft 12a is a ball screw 13.
The ball screw 13 is rotatably supported by a support box 14. A pair of driven nuts 15 and 16 which are driven bodies are screwed onto the ball screw 13 via balls (not shown). A pair of driven nuts 15, 16 are urged toward each other by clamping mechanism (not shown) are preloaded against the ball screw 13 via a ball.
Further, sliders that engage with guides fixed to the support box 14 are attached to the driven nuts 15 and 16 to prevent their rotation. Therefore, the driven nuts 15 and 16 which are the driven bodies integrally move by the forward and reverse rotations of the ball screw 13 and move up and down without backlash. One end of the link 21 rotates on the side surface of the driven nut 15.
Freely attached to the other end of the link 21, one end of the trade Le lever 6 which is rotatably supported is pivotably connected to a support shaft 6a provided on the supporting box 14, this trade Le
The other end of the lever 6 is pivotally attached to one end of a connecting bar 7.

The variable speed motor 12 is controlled by a control unit 17 having a central processing unit CPU as shown in FIG. The central control unit CPU inputs from the rotary encoder the weaving conditions input by the input device 18 and signals from sensors or the like arranged at various places of the loom, for example, the rotational speed of the main motor of the loom, and the arithmetic processing operation. I do. A control program is stored in the read-only memory ROM. Readable and rewritable RAM
Is the optimum opening curve, opening amount, opening closing timing, reference opening, position (for air jets, the lower thread is the standard), and other conditions and data related to the opening, such as the upper and lower movements of the heddle frame 3. The speed of movement and the stop time at the stop position are stored.

A sensor (not shown) is arranged at the stop position of the heald frame, data is read from the RAM in response to a signal from this sensor, and a command is issued to the shift control device 19 based on the read data. The speed of the variable speed motor 12 is changed. The rotation speed of the variable speed motor 12 is always controlled by the central processing unit C via the rotary encoder.
It is fed back to the PU.

As shown in FIG. 1, a tension spring 20 as an urging means is provided between the machine base F and one end of a connecting bar 7 which is one of transmission members.
It acts so as to push the heddle frame 3 upward. This is because the heddle frame 3 has its weight added and accelerated when it descends, but it may be delayed to increase its weight when it ascends, so its effect is eliminated, This is to balance the conditions of upward movement and downward movement.

Now, when a command to start the loom is issued from the central processing unit CPU, a command processed from the conditions set by the input device 18 and the data stored in the read / write memory RAM is sent to the variable speed motor 12. The variable speed motor 12 is sent to the speed change control device 19 to operate. The rotation of the variable speed motor 12 causes the ball screw 13 that is a part of the rotary shaft 12a thereof to rotate, and the pair of driven nuts 15 and 16 that are driven bodies integrally move up and down. One end of the trader lever 6 is pivotally attached to the side surface of the driven nut 15 via a link 21, and the trader lever 6 swings as the driven nut 15 moves up and down. This swing is transmitted to the heddle frame 3 via the connecting bar 7, the angle lever 8 and the connecting rod 9 which are the same transmission members as in the conventional case, and the heddle frame 3 moves under the control of the controller 17.

According to this embodiment, an expensive cam is not required, and if the necessary conditions and data are input by the input device, different types of woven fabrics can be immediately woven.

[0018]

According to the present invention, the driving of the opening device is
Since the ball screw is rotated by the variable speed motor controlled by the controller and the swinging of the trade lever 6 is performed, the connecting bar 7, the angle lever 8 and the connecting rod 9 which are conventional transmission members are used. Therefore, it is possible to immediately respond to changes in the type of woven cloth, changes in conditions during weaving, and the like.

[Brief description of drawings]

FIG. 1 is a schematic front view of a shedding device for a loom showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a control device for a variable speed motor of the shedding device of the loom shown in FIG.

FIG. 3 is a schematic front view showing a shedding device of a conventional loom.

[Explanation of symbols]

3 heddle frame 6 trade lever 6a spindle 7 connecting bar 8 Angle lever 9 Connecting rod 12 Variable speed motor 12a rotating shaft 13 Ball screw 14 Support Box 15, 16 driven body (driven nut) 17 Control device 18 Input device 19 Shift control device 20 tension spring 21 links F machine stand

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-5-138484 (JP, A) JP-A-2-228590 (JP, A) JP-A-2-145831 (JP, A) JP-A-57- 112430 (JP, A) Actual development 4-4076 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) D03C 13/00 D03C 5/00

Claims (2)

(57) [Claims] 1. A bow in a support box arranged laterally of a heddle frame.
Installed rotatably, and placed outside the support box,
In front of the rotary shaft of the variable speed motor controlled by the controller
The ball screws are integrally connected, and a pair is attached to the ball screws.
The driven nut of the
The driven nuts of the
By energizing the rotary motion of the variable speed motor, linear movement of the driven nut
To one end of the heddle frame in the longitudinal direction.
-A swingable trade relais connected via a rod, rod, etc.
The other end of the bar and the driven nut are connected via a link
The linear movement of the driven nut
A shedding device for a loom that converts the shedding motion into motion and transmits the shedding motion to the heddle frame . 2. The heald frame and / or the luck to the heald frame.
2. The shedding device for the loom according to claim 1, wherein the motion transmitting member is provided with an urging means that acts to push up the heald frame.