JPH0112863B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a grain straightening device that is incorporated into or combined with a fabric stretching machine, cloth feeding device, etc. for a printing stand.

When printing, feeding cloth or stretching the cloth without diagonal or wavy grains is
It is extremely important to obtain high quality printed products.
For example, Utility Model Application Publication No. 55-15056 discloses a pair of pins that are arranged to spread out along the running direction of the cloth, and that the ears of the cloth are hooked onto pins planted in the outer rim so that each pin can rotate independently. It is described that a wheel is used, and that distortions such as diagonal grains are absorbed by the difference in rotational speed of a pair of pin wheels that can rotate independently of each other. The present invention is a major improvement on the above-described invention, and employs a different and superior mechanism for adjusting the degree of spread at the end of the pinwheel, and also adds a mechanism that can displace the pinwheel in the width direction of the cloth. To provide a grain straightening device that employs a control system that allows pins of a wheel to accurately follow and engage the selvage of the cloth.

That is, the grain straightening device according to the present invention includes a pair of pins that are arranged to spread out along the running direction of the cloth, and each of which can be rotated independently by hooking the selvage of the cloth onto a pin implanted in the outer rim. In a grain straightening device that incorporates a wheel, the outer end of the pin wheel shaft is mounted so that it can tilt, and the inner end is mounted so that it can tilt, and at the same time, it is arranged parallel to the width direction of the cloth and It is characterized by being slidably fitted onto a movable slide rail that can be moved in parallel in a direction perpendicular to the .

In the above, in order to adjust the degree of spread of the pinwheel, it is necessary to displace the relative position of the inner end with respect to the outer end of the pinwheel shaft. Therefore, the movable slide rail that supports the inner end is It is necessary to be able to translate it in a direction perpendicular to the width direction of the cloth. As means for this parallel movement, for example, the movement of the movable slide rail can be configured to form a cylindrical surface or a plane, and in the former case, the rotation angle of the movable slide rail, and in the latter case, the movable slide rail can be The distance traveled by the rail,
By changing each, the degree of spread of the pinwheel at the end can be adjusted. Due to the parallel movement of the movable slide rail, the pin wheel becomes wider in the same direction as the movement direction. Therefore,
Of the cloth hung on the pin wheel, the portion of the cloth running in the same direction as the above-mentioned moving direction is subjected to a width-widening action.

In order to adjust the degree of spread of the pinwheel, it is necessary to displace the inner end of the pinwheel shaft using a movable slide rail as described above. The shaft is mounted so that it can be tilted. The displacement of the inner end that occurs parallel to the width direction of the cloth due to the inclination of the pin wheel axis can be smoothly absorbed by sliding on the movable slide rail.

Even if the outer end of the pinwheel shaft is fixed so that it can tilt, the purpose of normal grain straightening can be achieved, but
In order to easily adjust the position of the pinwheel or to adopt a system that allows the pinwheel to automatically follow the edge of the fabric with high precision, one or both outer edges should be placed parallel to the width direction of the fabric. A structure that slides into the fixed slide rail may be adopted. In this case, the outer and inner ends of the pinwheel shaft can slide on the fixed slide rail and the movable slide rail, respectively, which are parallel to each other, so the pinwheel can maintain its distal extension. , it can be displaced in the width direction of the cloth.

Therefore, for example, one outer end of the pinwheel shaft is fixed so as to be tiltable (the pinwheel in this case is referred to as a fixed pinwheel), and the other outer end is movable so as to be tiltable on a fixed slide rail (the pinwheel in this case is referred to as a fixed pinwheel). In this case, the pinwheel is called a movable pinwheel), one ear of the cloth controls the centering roll so that it comes into contact with the fixed pinwheel, and at the same time, the other ear part of the cloth controls the movable pinwheel so that it comes into contact with the movable pinwheel. By configuring a system that controls this, the edges of the fabric can be engaged with the pinwheel with high accuracy, and more effective grain correction can be achieved. In this case, as a method of controlling the centering roll and pinwheel, a conventional method can be adopted in which the position of the edge of the cloth is detected photoelectronically or mechanically and a hydropneumatic cylinder, electric motor, etc. are operated. Also,
There are no restrictions on the structure, mechanism, etc. of the centering roll, and for example, a split roll system or others may be used.

Next, the embodiment shown in the drawings will be described. 1 and 2 are plan views of a pinwheel mechanism in an embodiment of the present invention. In either case, the outer and inner ends of pin wheel shafts 3 and 3a supporting pin wheels 2 and 2a having pins 1 implanted at appropriate intervals on the outer rim are spherical bearings 4, 4a and 5,
5a, and the spherical bearings 5, 5a at the inner ends are mounted on movable slide rails 6.
The slide bearings 7, 7a are slidably fitted into the
is connected to. The movable slide rail 6 is connected via rotating arms 8, 8a to a rotating shaft 10 attached by bridging the frames 9, 9a, and a handle 11 is rotatably and fixably attached to the end of the rotating shaft 10. The operation rotates within a certain range together with the rotating shaft 10, displacing the relative position of the inner end with respect to the outer end of the pin wheel shafts 3, 3a, and adjusting the degree of spread of the pin wheels 2, 2a at the end. can.

In the one shown in FIG.
The outer end of a is axially mounted on support arms 12, 12a attached to frames 9, 9a via spherical bearings 4, 4a, and therefore the pin wheels 2, 2a cannot be moved. In the one shown in FIG.
4 and 14a via spherical bearings 4 and 4a, and the slide bearings 13 and 13a are mounted on the rotating shaft 10 via bearings (not shown).
and the rail support pipe 1 fixed to the frames 9, 9a.
Fixed slide rail 16 installed in parallel with 5, 15a,
16a, so that the pin wheels 2, 2a can be moved in the axial direction of the movable slide rail 6 or the fixed slide rail 16, 16a, ie in the width direction of the fabric.

Moreover, the one shown in FIG. 3 is constructed by arranging an immovable pin wheel in FIG. 1, that is, a fixed pin wheel 17, and a movable pin wheel in FIG. 2, that is, a movable pin wheel 18. 15 and the fixed slide rail 16, the reference piece 1 is adjusted and fixed according to the cloth width, etc.
At the same time, the pneumatic cylinder 21 is attached to the cylinder mounting plate 20 extending through the frame 9 and the piston rod 22 is attached to the connecting arm 1.
4, and by operating the piston rod 22,
A movable pin wheel 18 is movable relative to a reference piece 19.

FIG. 4 is a side view of essential parts of the grain straightening device incorporating the pinwheel mechanism shown in FIG. 3. That is, the cloth 23 has a centering roll 24, a cloth edge detector 25, cloth feeding rolls 26, 27, a dancer roll 28, a cloth edge detector 29, and a brush roll 3.
0, via the fixed pinwheel 17, movable pinwheel 18, bar expander 31, etc.
For example, it is supplied to an endless belt (not shown) of an autoscreen printing machine.

One edge of the cloth 23 is detected by a cloth edge detector 25 and the centering roll 24 is controlled so as to engage the fixed pinwheel 17, and the other edge is attached to interlock with the movable pinwheel 18. The movable pinwheel 18 is controlled so that the movable pinwheel 18 engages with the edge of the fabric.

The dancer roll 28 is made of a lightweight aluminum roll or the like, and the cloth 2 is rotated around the dancer roll rotation shaft 32.
3, the displacement is detected according to the difference between the pull-out speed and the feed speed, and the variable speed motor 33 connected to the cloth feed roll 26 is controlled by detecting the displacement, so that the cloth 23 is always kept at a low tension by the fixed pin wheel 17.
and the movable pin wheel 18.

The brush roll 30 is attached in a pressed state to the outer rim portions of the fixed pin wheel 17 and the movable pin wheel 18, and the cloth 23 supplied to the fixed pin wheel 17 and the movable pin wheel 18 in an overfeed state is transferred to the brush roll. Since it is pressed by the brush planted on the periphery of 30,
This helps to effectively maintain or promote the overfeed state of the cloth 23, allowing for better grain correction.

In addition to arranging the brush rolls independently for each pinwheel, preferably so as to widen the width along the running of the cloth, it is also possible to place one brush roll against a pair of pinwheels by pressing them against each other. Alternatively, brushes may be installed over the entire length of the brush roll or in the portions that contact each pinwheel. In addition, the brush roll can be rotationally driven by an external power other than by the running of the cloth, and in the latter case, it is possible to promote overfeed of the cloth in the pin wheel.

The dancer roll mechanism or brush roll mechanism used together in the embodiment shown in FIG. It can be widely used in a mechanism of a pair of pin wheels that are hung on pins embedded in the rim portion and can be rotated separately, and is useful for more effectively correcting grain using the pin wheels.

As described above, in the cloth straightening device according to the present invention, it is possible to easily adjust the degree of spread of the pinwheel at the end, and also to move the pinwheel in the width direction of the cloth. This made it possible to adjust the position of the pinwheel and automatically follow the pinwheel to the edge of the fabric.

[Brief explanation of drawings]

1 to 3 are plan views of a pinwheel mechanism constituting the grain straightening device according to the present invention, and FIG. 4 is a side view of essential parts of the grain straightening device according to the present invention. 1... Pin, 2, 2a... Pin wheel, 3, 3a
...Pin wheel shaft, 4,4a...Spherical bearing, 5,5
a... Spherical bearing, 6... Movable slide rail, 7, 7
a...Slide bearing, 8, 8a...Rotating arm, 9,
9a... Frame, 10... Rotating shaft, 11... Handle, 12, 12a... Support arm, 13, 13a...
Slide bearing, 14, 14a...Connection arm, 1
5, 15a...Rail support tube, 16, 16a...Fixed slide rail, 17...Fixed pin wheel, 18
...Movable pin wheel, 19...Reference piece, 20...Cylinder mounting plate, 21...Pneumatic cylinder, 22...
Piston rod, 23... Cloth, 24... Centering roll, 25... Fabric edge detector, 26, 27... Fabric feeding roll, 28... Dancer roll, 29... Fabric edge detector, 30... Brush roll, 31... Bar expander, 32... Dancer roll rotation axis, 33...
Variable speed motor.

Claims (1)

[Claims] 1. Incorporating a pair of pin wheels that are disposed in a manner that spreads out along the running direction of the cloth, and that the edges of the cloth are hooked on pins planted in the outer rim so that each pin wheel can be rotated independently. In the fabric straightening device, the outer end of the pinwheel shaft is tiltable, and the inner end is tiltable. A grain straightening device characterized in that it is slidably fitted onto a movable slide rail that can be moved in parallel. 2. The cloth straightening device according to claim 1, wherein the movable slide rail is rotatable around an axis arranged parallel to the width direction of the cloth. 3. A grain straightening device incorporating a pair of pin wheels which are disposed to spread out along the running direction of the cloth, and each of which can be rotated independently by hooking the selvage of the cloth onto a pin implanted in the outer rim, The outer end of the pin wheel shaft is tiltable and at the same time, at least one of the pinwheel shafts is slidably fitted into a fixed slide rail arranged parallel to the width direction of the fabric. A cloth grain correction device characterized by being slidably fitted on a movable slide rail that is arranged parallel to the width direction of the cloth and can be moved in parallel in a direction perpendicular to the width direction of the cloth. 4. The cloth straightening device according to claim 3, wherein the movable slide rail is rotatable around an axis arranged parallel to the width direction of the cloth. 5. A grain straightening device incorporating a pair of pin wheels which are disposed in a widening direction along the running direction of the cloth, and whose selvedges of the cloth are hooked onto pins implanted in the outer rim so that each pin wheel can be rotated separately, The outer end of the pinwheel shaft is mounted so that it can tilt, and at the same time, one side of it is slidably fitted into a fixed slide rail arranged parallel to the width direction of the fabric. At the same time, the centering roll is controlled so that one edge of the fabric comes into contact with a fixed pin wheel; A grain correction device characterized in that the movable pinwheel is controlled so that the other ear portion comes into contact with the movable pinwheel. 6. The cloth straightening device according to claim 5, wherein the movable slide rail is rotatable around an axis arranged parallel to the width direction of the cloth.