JP2622544B2 - Weft weaving position adjustment device - Google Patents

Description

The present invention relates to an apparatus for adjusting the weaving position of a weft in a loom provided with a device for weaving a weft using a spatula having a through hole at a tip end.

As a woven fabric in which the weaving position of the weft in the weft direction is emphasized, there are a weaving weave and a draw foil weave. In particular, the flat foil thread 24 for the foil used in the weaving of a band, a hook, a gold column, etc. is usually 0.3 mm to 0.4 mm in width with a piece of paper or a plastic film on which a pattern or picture is drawn, leaving the ear paper b at both ends. It is cut into strips, and at the time of weaving, as shown in FIG. 1, the ear paper b at both ends is cut off, separated by hand by one hand, and woven as weft using a spatula having a hook at the tip. This weaving method is used to reproduce the pattern drawn on a piece of paper or film on the fabric.If the left and right positions of the weft direction of the flat foil yarn are shifted from the previously woven weave, the pattern will be lost. It is not reproduced as an intentional design.

(B) Conventional technology Conventionally, as a method for adjusting the position of the strip-shaped weft yarn 20, there are:
The reference mark 30 provided on the weft cut at a fixed length or the opposite end 31 of the grip and the mark 32 provided on the loom or this yarn drawn into the weave so as to match the positional relationship with a specific warp constantly. There is a manual weaving method in which the other end of the reference mark of the weft is pulled by hand to perform positioning. However, if the position accuracy is increased due to manual work, the weaving efficiency is extremely reduced. As a means for mechanizing the above method, this weft thread is inserted by hand from above into a vertically opened spatula tip hole shown in FIG. 3, and one end of the weft thread at the time of pulling in is held by a thread grasping portion provided immediately below the hole. A method of moving the yarn grasping part in the direction of pulling back this weft after completion of drawing into the weaving opening and detecting the other end of this weft at a certain position using a photoelectric sensor to perform alignment can be easily considered. Since the stiffness in the compression direction is poor and only movement in the retraction direction is possible, this weft yarn must be extra drawn in beforehand.
Compared to the ordinary weaving that is performed immediately after pulling in, the reduction in efficiency for the pulling back time for adjusting the left and right positions of the weft is inevitable. Further, it is difficult to apply tension to the other end portion of the weft yarn with another device for the purpose of detecting with light, and errors in alignment are likely to occur due to deformation of the weft yarn, such as twisting or warping. As a weft weaving device, Japanese Patent Publication No. 1051448 / Japanese Patent Publication No. 55-45658 by the present inventor has already been proposed. By using this patented device, the pattern of this weft is much more aligned than when weaving by hand, but the degree of alignment depends on machine precision and cannot be varied. It was difficult to detect the positional deviation due to variation before weaving.

(C) Problems to be Solved by the Invention The present invention has been made in order to solve the above-mentioned defects, and the current weaving method in which the end weft yarn 20 is inserted into the hole at the tip of the spatula, grasped, and the other is drawn into the weaving mouth. It is an object of the present invention to provide a device capable of adjusting the position of the weft yarn 20 more freely without reducing the efficiency of the weft.

(D) Means for Solving the Problems Hereinafter, embodiments of the present invention will be described in detail.

Embodiment 1 FIG. 1 schematically shows a weft position adjusting device installed at the front of the loom slay 1 on the left side of the warp yarns 21 and 22 when viewed from the cloth fell, and the device attached to the front of the slay 1. One of the thread rubbing bar 3 and one of the slide rails 4 is fixed to the frame 2, the thread gripping and fixing device 5 is fixed to the other slide rail 4 a that moves so as to slide on one of the slide rails 4, and the shaft 6 is fixed to the thread gripping and fixing device 5. The thread grasping operation finger 7 is rotatably mounted via the. A female screw is cut in a part of the thread grasping / fixing device 5, and a rotatable screw shaft 8 having a male screw is screwed into one end thereof. The screw shaft 8 has axially detented lower collars 9a attached to shaft portions on both sides of a frame that passes through, and a pulley 10 is fixed to the other end. The pulley 10 is connected to a pulley 12 by a belt 11, and the pulley 12 is fixed to a motor 13 shaft. The base of the outer wire 14 of the coaxial double wire is fixed to a part of the through-hole or notch of the thread grasping / fixing finger. The inner wire 15 is slidably contained with the outer wire, protrudes from the base, and is fixed to the thread grasping operation finger 7. The above coaxial double wire 14,
The other end of 15 is fixed at an outer wire at another place, and the inner wire is connected to an iron core of a solenoid (not shown).
A detection window 16 is opened in the thread grasping / fixing device 5, and a detection window 17 is also opened in the thread grasping operation finger 7. The light of the sensor floodlight 18 passes through the detection windows 16 and 17, and the yarn end detection sensor
19, an output signal of the sensor 1 is generated by blocking light incident on the sensor 1. The position where the incident light is blocked is the detection position of the sensor. The sensor is fixed to the second portion of the apparatus frame or the thread bending bar.
As the yarn end detecting sensor 19 and the light emitting lamp 18, a sensor having a rectangular detection range as shown in FIG. 2 is applied.
In the sensor shown in FIG. 2, one end of the optical fiber 27 is arranged in a line with the light receiving surface as a light receiving surface, and the other end is focused and applied to a light receiving element. The weft thread tip 24a is inserted into the weft thread 2 inserted into the thread grasping section 5a.
This is in order to cope with a variation of about several millimeters in the position of the tip 24a of 4 in the direction of the warps 21 and 22.

As this photoelectric detection device, there is a photoelectric detection device whose detection range has a cross section in which rectangles each having a side of 1 mm or less and the other side of 3 mm or more are arranged in the short side direction as a detection range cross section parallel to the light receiving surface. is there.

(E) Operation The operation of this embodiment will be described through operation.

After the spatula 25 penetrates through the weaving opening and protrudes to the upper part of the weft weaving position adjusting device by the spatula in / out device having the spatula 25 having the spatula tip hole 25a shown in FIG. 20a penetrates the spatula tip hole 25a and thread grasping part
When the push button switch (not shown) is pushed with one hand when the thread is passed past 5a to the upper part of the detection position of the yarn tip detection sensor 19, the solenoid operates and the inner wire 15 connected to the solenoid iron core is pulled. Then, the thread grasping operation finger 7 rotates and is pressed against the thread grasping and fixing device 5 to grasp the weft thread 20. When grasped, the motor 13 starts rotating by the operation signal of the solenoid. The rotation of the motor 13 is a pulley
From 12 to pulley 10 via belt 11
The screw shaft 9 fixed to the shaft is rotated. Since the axial movement of the screw shaft 9 is fixed, the thread grasping / fixing device 5 that can freely move in the vertical direction by the slide rail 4 is moved. At this time, the motor
The rotation direction of 13 is controlled so that the yarn grasping / fixing device 5 is moved downward until the output signal of the yarn end detection sensor 19 is output. When the yarn end 20a blocks light, the output signal of the sensor is output. The motor 13 stops. As a device for moving the grasped weft yarn A, a yarn grasping device that moves linearly in the axial direction of the grasped end of the weft yarn, or a yarn grasping device as shown in FIG. Ohm gears 34, 35 around the shaft 33 with a circular motion with the axial direction tangent to the axial direction of the
To move the weft yarn.

Since the thread grasping force of the thread grasping device is exerted by the coaxial double wire whose tension does not change by swinging, the yarn grasping force does not change even by the movement of the above-described yarn grasping device. A control circuit is arranged so that the spatula 25 starts the operation of drawing the weft yarn 20 into the weaving sheave simultaneously with the operation of the solenoid.
And the moving device operate in the opposite direction to the weft in parallel at the same time, so that it is difficult to affect the efficiency of a series of operations for weaving the weft 20, and the operations of both devices are opposite to each other with respect to the weft 20. Since the tension is applied in the direction, the weft thread tension and the weft thread moving function do not change even if the operation stop timing of both devices is shifted. Furthermore, from the yarn grasp of the moving device,
If the moving speed until a reaches the detection position is set within the retracting operation time of the spatula 25, when the spatula 25 retreats and the weft 20 has been drawn into the weaving opening, the left and right alignment of the weft 20 has already been completed. The processing is finished as shown in the figure, and the user can immediately start the beating operation.

(F) Effects of the Invention As described above, the present invention can realize the precise positioning of the end weft 20 and can realize the accurate reproduction of the pattern drawn on the end weft 20. In addition, since the end of the end weft is aligned in parallel with the pulling operation of the spatula, the efficiency is not reduced even if it is added to the current weaving method. Further weft yarn tip
Since the position near 20a is grasped, the tip position is stabilized and the detection accuracy is increased.

Further, the present invention can be applied not only to the case where the end weft yarn 20 is manually woven, but also to the aforementioned Japanese Patent No.
It can be incorporated into the No. 8 device. In this case, as described above, the above-described patent apparatus may have a low working accuracy due to wear or the like, a temporary malfunction, or a positional deviation due to a variation in yarn material. Is added, it is possible to improve the correction effect even for an unexpected positional deviation.

Various applications other than the above are possible, examples of which will be described below.

Embodiment 2 An embodiment using the output signal of the yarn end detecting sensor 19 in place of the solenoid operation signal in the apparatus configuration of the embodiment 1.

The thread grasping device comprising the thread grasping / fixing device 5, the thread grasping operation finger 7, the shaft 6, and one end of the coaxial double wire 14, 15 is caused to stand by at an intermediate position in the moving range of the slide rail 4a, and is to be woven. The weft 20 is inserted by one hand up to the detection position of the yarn end detection sensor 19 as in the first embodiment, and an output signal of the sensor is generated, and the signal is used as an operation signal of the solenoid to operate the solenoid. Then, the inserted weft yarn 20 is grasped. At this time, since the weft leading end 20a after grasping the yarn is not always blocking the light of the yarn leading end detecting sensor 19, depending on the state of the output signal of the same sensor after grasping the yarn, that is, no output signal is output. In such a case, the weft thread tip 20a in the descending direction so as to block light,
When an output signal is output, the position is adjusted by operating the motor 10 in the ascending direction so that the weft yarn end 20a does not block light. According to this embodiment, in addition to the advantage of the embodiment 1, the operator does not need to hold the weft thread tip 20a at a desired height until the push button switch is pressed after the weft thread insertion, so that the worker can simply insert the weft thread tip 20a. Moreover, weft weaving work can be performed with one hand.

Third Embodiment As another application example, an example in which a timer mechanism for arbitrarily delaying the output signal of the yarn tip detection sensor 19 as a control circuit using the device configuration of the first embodiment will be described.

By delaying the output of the sensor by an arbitrary time by using a variable timer as the timer mechanism, it is possible to easily further correct the displacement between the picture of the woven weft 20 to be woven and the woven pattern due to the woven structure. In addition, if a control system that can change the time data of the timer in accordance with the order stored in advance is used, a pattern expression with various deviations can be realized.

Embodiment 4 As an application example for implementing a similar pattern expression, when a sensor having a multilayer detection range in the vertical direction, for example, a CCD area image sensor or the like is used as a weft end detection sensor,
The position can be adjusted at an arbitrary position by performing control so that an arbitrary layer within the detection range of the multilayer is specified as a detection layer (detection position).

In addition, the weft weaving position adjusting device according to the present invention can be used not only for flat foil yarns having a length equal to or longer than the full width of the weave, but also for short wefts that do not reach the full width of the weave. It is also possible to use a weave structure or a pattern expression in which weft yarns are inserted.

As described above, according to the weft weaving position adjusting device of the present invention, the tip of the weft yarn is moved and aligned in parallel with the operation of the spatula 25 that draws the end weft yarn 20 into the weaving opening, so that after the weaving opening is retracted. According to the selection of the driving source (motor speed), the end weft 20 can be drawn into the weaving shed and positioned during the operation by selecting the driving source (motor speed) much faster than the positioning method based on the detection of the opposite end. Further, since the vicinity of the end 20f of the end weft detected by the sensor is grasped, it is hard to be affected by the deformation such as the warp and the warp of the weft, and the accurate alignment can be realized.

[Brief description of the drawings]

FIG. 1 is a perspective view of a weft weaving position adjusting device installed in a shuttle race section of a loom, FIG. 2 is a perspective view of a light receiving portion of a yarn tip detection sensor used in one embodiment of the present invention, and FIG.
The figure is a perspective view of the vicinity of the through hole at the tip of the spatula, FIG. 4 is a perspective view of the shape of a flat foil yarn which is an example of an end weft yarn, and FIG. 5 is a diagram showing a yarn woven in front of a weft yarn with a pattern. It is the figure seen from the top which shows the thread delivered to the weaving mouth and the left-right position. FIG. 6 is a perspective view of a mechanism in which the yarn grasping device makes a circular motion about the shaft 33, and FIG. 7 shows a method of manually aligning the reference mark or the other end of the weft with the mark on the warp or the loom manually. FIG. 8 is an operation diagram showing the movement of the yarn grasping device and the spatula and the weft at the time of adjusting the position of the weft by arrows 1. Loom slay 2,... Device frame 3,. …… Slide rail, 4a …… The other slide rail, 5 …… Thread grasping and fixing device, 5a …… Thread grasping part, 6 …… Axis,
7 ... thread grasping operation finger, 8 ... screw shaft, 9 ...
... Collar, 9a ... Bottom collar, 10 ... Pulley, 11 ... Belt, 12 ... Pulley, 13 ... Motor, 14 ... Outer wire, 15 ... Inner wire, 16 ... Detection window, 17 ... Detection window, 18 Floodlight, 19 Thread end detection sensor
20 ... weft, 20a ... weft tip, 21 ... warp (upper thread), 2
2 ... warp (bottom thread), 23 ... Osa, 24 ... fabric, 25 ...
Spatula, 25a… Spatula tip hole, 26… Slit, 27… Optical fiber, 28… Fiber convergence fitting, 29… Light receiving element, 30… Reference mark, 31… Opposite end of grasp, 32… Loom Mark provided above

Claims (4)

(57) [Claims] 1. A spatula tip of a spatula passing in a weft insertion direction from the outside of the other ear of the woven fabric into the warp opening outside the one ear of the woven fabric being woven on a loom. When one end of an end weft thread (a weft thread having both ends for each weaving) is inserted through a spatula tip hole provided at the tip of the spatula, it is set at a position where it grabs slightly inside the thread tip. A weft grasping device, a moving device for moving the yarn grasping device in a direction in which the grasped tip of the weft yarn faces (referred to as the axial direction of the tip), and a weft thread tip for setting the weft thread tip movement position. A photoelectric detecting device for detecting, and a yarn rubbing bar placed at an intersection of an axial direction of the weft leading end and a weft inserting direction. By controlling the driving of the moving device by the tip detection signal, Weft weaving position adjusting device for adjusting the position of the transverse thread tip Te. 2. The weft weaving position adjusting device according to claim 1, wherein said moving device moves linearly in the axial direction of said weft yarn tip. 3. A weft weaving position adjusting device according to claim 1, wherein said moving device moves on a circular arc having a tangent to the axial direction of said weft yarn tip. 4. A light receiving surface of the photoelectric detection device, wherein a rectangle having one side of 1 mm or less and the other side of 3 mm or more is formed in the short side direction.
2. The weft weaving position adjusting device according to claim 1, which has a surface arranged in layers or more.