JPH0671952B2 - Spreading machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention provides a sheet-shaped product from a raw roll formed by winding a long sheet-shaped product in a roll shape onto a spreading table, and then forms the sheet-shaped product. The present invention relates to a spreading machine as a device for performing a spreading operation of stacking or folding objects.

[Conventional technology]

The basic spreading machine generally rotates the original roll in the unwinding direction by a predetermined means, feeds the sheet material unwound by the rotation of the original roll onto the feeding roll, and feeds the roll and the sheet. It is configured to have a cutter mechanism that hangs the sheet-like object on the spreading table by frictional resistance with the sheet-like object and cuts the hanging sheet-like object in a transverse shape at a predetermined position. And, as a means for rotating the material roll in such a fabric spreading machine, conventionally, a pair of defusing rolls on which the material roll is mounted are arranged in parallel, and these defusing rolls have the same peripheral speed. , Which rotates the original roll smoothly at a uniform speed by rotating it in the same direction,
Alternatively, a pair of endless belts that are rotated in a fixed position are arranged in a V shape, and these endless belts are rotated in the same direction at the same speed so that the original roll mounted thereon is smoothed at a uniform speed. Those that rotate were used.

[Problems to be solved by the invention]

However, there are inevitable winding irregularities in the original roll, and the contact pressure of the original roll against the unwinding roll and the endless belt for unwinding is the contact pressure of the original roll. Since there are often differences in various parts in the width direction, the sheet-like material disentangled from the original roll by the disintegrating roll is obliquely crossed and pulled at both ends in the width direction or the central part. It may have become. In this state, the sheet-like material in the pulled-down state is hung down by the feeding roll onto the spreading table, and when the sheet is cut in a transverse shape by the cutter mechanism, the sheet having a predetermined length cut by the cutting is cut. As the pulled state of the shaped material is eliminated, the cut edge may be deformed into a curved shape, which may cause inconvenience in processing the sheet-shaped material in the next step.

Therefore, the suspended state is canceled until the sheet material that is unwound from the original roll is hung down through the feeding roll, and the sheet material hung down from the feeding roll is no longer needed. Various measures have been studied to prevent such a dragged state.
As a result, the distance between the pair of unraveling rolls or the endless belt for unraveling and the payout roll was increased, and the sheet formed from the original roll was unraveled in the space formed between them. It was attempted to convey the sheet-like material to the payout roll side by a certain length by frictional resistance, and then to interpose a mechanism for correcting the suspended state that guides the sheet-like material to the payout roll.

In a spreader equipped with such a pulling state correction mechanism, the pulling state may be canceled while the sheet-like material that is unwound in the pulled state is conveyed by the correction mechanism. It was expected, but in reality it was not until the dragging state was completely eliminated, and when the sheet-like material hanging from the feeding roll was cut and cut by the cutter mechanism, the cut edge was still It was found to be deformed into a curved shape. In addition, this spreading machine requires an extra space to attach a mechanism for correcting the dragged state,
There was also a drawback that the length of the sheet spreading machine became long and large.

As described above, the conventional spreading machine is in a state in which the sheet-like material disentangled from the original roll is in a pulled state, and the suspended state is hung down by the feeding roll onto the spreading table. In addition to the problem that the edge cut by the cutter mechanism becomes curved as a result, it is not completely resolved during the period, and if you try to reduce the pulling state to some extent, the spread machine enlarges. There was a problem of doing.

The present invention has been made in order to solve the above problems, and causes an increase in size as a whole by a simple improvement of a pair of disentanglement rollers and an improvement of a feeding state of a disentangled sheet-like material. It is an object of the present invention to provide a spreading machine capable of completely eliminating the dragged state of a sheet-like material.

[Means for Solving Problems] In order to achieve the above-mentioned object, the retraction machine according to the present invention comprises:
A pair of defibrating rolls, which are arranged in parallel with each other and have a long sheet-like material wound around them in a roll shape, are driven to rotate in the same direction at the same speed, and this pair of defibrating rolls is the same. The sheet-like material is driven to rotate in the direction of rotation and unwound from the original roll by the rotation, and is fed out by feeding it in a hanging state, and the pair of unrolling rolls and the pair of unrolling rolls are fed out. In a spreading machine equipped with a rotation drive mechanism that drives the deflocculating roll side to always rotate at a high speed, at a plurality of positions in the circumferential direction of the outer peripheral surfaces of the pair of defusing rolls, the rotation of the defusing rolls causes A ridge is provided to rotate the original roll while repeatedly repelling it, and of these pairs of defibrating rolls, the ridge is arranged on the front side in the unwinding direction of the sheet material from the original roll. Between the deflocculating roll and the feeding roll, the slack detecting means for detecting whether the slack width is excessive or deficient is provided by slackening the sheet-like material that has been defused by the rotational speed difference between the two rolls. On the basis of the detection signal of the slack detecting means, the rotational speeds of the pair of unwinding rolls by the rotary drive mechanism are automatically controlled so that the slack width of the sheet-like material becomes substantially constant.

[Operation] According to the present invention, the pair of unrolling rolls on which the unrolled rolls are placed are driven to rotate in the same direction. The roll rotates while repeatedly being repelled, and the sheet-like material is unwound and transferred to the delivery roll side. Therefore, the original roll is repeatedly beaten in the above-mentioned projecting state when it is unraveled and floats up from the unraveling roll, and at that moment, the dragged state of the sheet-like material that is continuously unraveled from the original roll is It will be solved one after another.
Further, the disentangled sheet-like material is placed on the delivery roll and sent in a hanging state, but at this time, since the rotation speed of the disentanglement roll is higher than the rotation speed of the delivery roll, it is disentangled. The sheet-like material will be slackened downward between both rolls, and the rotation speeds of the pair of defibrating rolls will be automatically controlled so that the slackening width will be substantially constant. In the slack portion of the sheet, the dragged state remaining on the sheet-shaped material is eliminated. In this way, by repeatedly flipping up the original fabric roll against the unraveling roll during unraveling and slackening the sheet-like product immediately after that, the dragged state of the sheet-like product is completely eliminated. Then, it becomes possible to move to the next stretcher stand.

〔Example〕

FIG. 1 shows that the original roll 100 is placed on a pair of the unfolding rolls 1 and 1 arranged in parallel, and the sheet-like material, for example, the cloth 101, which is unwound from the original roll 100, is placed on the feeding roll 2. It shows the state of hanging and hanging. Reference numeral 3 is an idle guide roll.

As shown in FIG. 2, the deflocculating roll 1 is provided with ribs 5 having a T-shaped cross-section integrally on the outer periphery of the cylindrical body 4 at a plurality of positions at equal intervals and formed between adjacent ribs 5, 5. By fitting the brim portions 8 of the ridge 7 into each of the groove portions 6, the ridge 7 is held in the cylindrical shape 4 in a protruding state. A non-slip surface layer material 9 such as felt is attached to the top surface of the protrusion 7. The projection 7 is made of a material such as rubber which has an elastic force and is hard to slip.

The pay-out roll 2 shown in FIG. 1 is formed by sticking a non-slip surface layer material 11 such as felt on the surface of a cylindrical body 10.

The unraveling rolls 1 and 1 are mounted on a frame of a spreading machine (not shown), and are rotationally driven in the same direction and at the same speed by a rotary drive mechanism described later. Similarly, the feeding roll 2 is also mounted on the frame, and is rotationally driven in the same direction as the unwinding rolls 1 and 1 by the rotary driving mechanism. Also,
The defibrating rolls 1, 1 are controlled so as to always rotate at a higher speed than the pay-out roll 2, and thus, of the pair of defibrating rolls 1, 1 with respect to the unwinding direction of the material 101 from the original roll 100. Between the unrolling roll 1 and the feeding roll 2 arranged on the front side, the unfolded cloth 101 is loosened due to the difference in rotational speed between the rolls 1 and 2. Further, the unwinding direction A of the fabric 101 from the original roll 1,1
A slack detecting means 12 using a photoelectric tube or another sensor is provided between the unwinding roll 1 and the feeding roll 2 arranged on the front side of the slack detecting means 12.
Thus, the excess or deficiency of the slack width of the cloth 101 is detected. Then, based on the detection signal of the slack detecting means 12, the rotational speed transmitted to the pair of unwinding rolls 1 and 1 is controlled by the rotation driving mechanism. Specifically, when the unwinding and unwinding of the fabric 101 from the original roll 100 is performed by rotating the unrolling rolls 1 and 1 and the unwinding roll 2, the slack width of the slack portion 102 of the dough 101 is When it becomes too large as shown in FIG. 3 (B), the rotation speed of the unrolling rolls 1 and 1 is slowed down so that the slack width becomes smaller, and conversely, the slack width becomes smaller than that in FIG. 2) is too small, control is performed to increase the rotation speed of the defibrating rolls 1 and 1 so that the slack width is increased. In this case, the rotation speed of the unrolling rolls 1 and 1 is set to be always higher than the rotation speed of the feeding roll 2 as described above.
When 0 is rotated, the anti-roll rolls 1 and 1 are rotated while being repelled by the protrusions 7 ..., and as shown in FIG. You will rotate the original roll 100 while slipping,
The above control is possible.

When the spreading machine with the above configuration is operated, a pair of unwinding rolls 1,1
The original roll 100 placed on is rotated while being repelled by the plurality of ridges 7 of the pair of unfolding rolls 1 and 1,
101 is unwound to the feeding roll 2 side. Therefore, when the original roll 100 is repeatedly unraveled, it is repeatedly hit by the ridges 7 of the unraveling rolls 1 and 1 and vibrates or swings violently. In addition, the pulled state of the fabric 101 that is continuously disentangled from the original roll 100 is gradually eliminated. Further, in the slack portion 102 of the cloth 101 in front of the feeding roll 2, the dragged state remaining on the cloth 101 without being canceled at the time of unraveling is canceled. Therefore, the cloth 101 is placed on the pay-out roll 2 after the pulled-down state is completely eliminated, and is fed onto the spreading table by the rotation of the pay-out roll 2.

FIG. 4 illustrates the rotary drive mechanism. The rotary drive mechanism shown in the figure uses the rotational power for transmitting to the traveling wheels 20, 20 of the spreading machine as the power for rotating the unwinding rolls 1, 1 and the payout roll 2. In the figure, reference numeral 21 denotes a traveling system that transmits the rotation of the output shaft of the motor M to the traveling wheels 20, 20, and includes chains 23 to 25 and sprockets 26 to 31.
And a rotary shaft 32. Reference numeral 33 denotes a first unwinding roll driving system that transmits the rotational movement taken out from the traveling system 21 to the unwinding rolls 1 and 1, and 34 is a feeding roll that transmits the rotational movement taken out from the unwinding roll driving system 31 to the feeding roll 2. It is a drive system. In the unwinding roll drive system 31, the rotary motion is transmitted from the sprocket 35 fixed to the rotary shaft 32 and the sprocket 30 of the traveling system 21 to the first intermediate sprocket 38 via the chains 36 and 37, and further via the chain 39. The rotational movement is transmitted to the second intermediate sprocket 40,
Together with 40, the rotary shaft 41 and the sprocket 42 fixed to the rotary shaft 41 rotate in the same direction. Two types of rotary shafts 44, 4 are provided between the rotary shaft 41 and the rotary shaft 43 of the unwinding roll 1.
5 are arranged, and two sprocket wheels 48, 4 are provided on each rotary shaft 44, 45 via one-way clutches 46, 47.
Among them, the sprocket 50 transmits only the right rotation of the rotation shaft 45 to the sprocket 48 via the chain 52, and the sprocket 48 transmits only the left rotation thereof to the rotation shaft 44. The other sprocket 51 transmits only its left rotation to the rotation shaft 45, and the sprocket 49 transmits only its right rotation to the rotation shaft 44. The relationship between the sprockets 42, 49, 51 and the chain 53 is shown in FIG. Therefore, when the traveling wheels 20, 20 rotate and the sprocket 42 rotates to the right when the retraction machine moves forward, the sprocket 51 is rotated to the left via the chain 53 and therefore is not transmitted to the rotary shaft 45, but the sprocket 49 is Since it rotates right, the rotation is transmitted to the rotation shaft 44, and the rotation shaft 44 rotates right. In addition, if the sprocket 42 rotates counterclockwise when the traveling wheels 20, 20 rotate in the reverse direction and the retraction machine moves backwards,
The sprocket 51 rotates right through the 53, the rotation is transmitted to the rotating shaft 45, the sprocket 50 rotates right, and the sprocket 48 rotates right through the chain 52. Therefore,
In this case also, the rotary shaft 44 rotates right. That is, the rotating shaft 44
Rotates in the same direction whether the reversing machine is moving forward or backward.

The rotation of the rotary shaft 44 is transmitted to the rotary shaft 54 via the rotation transmission mechanism 53, and further, the sprocket 55, the chain 56 and the sprocket.
It is transmitted to the rotary shaft 58 of the payout roll 2 via 57 and is transmitted to the rotary shaft 43 of the unwinding roll 1 via the sprocket 55, the chain 59 and the sprocket 60. Then, the rotation of the unraveling roll 1 is transmitted to another unraveling roll 1 via the intermediate gear 61. Note that reference numerals 62, 63, and 64 respectively represent one-way clutches, but these are not related to the present invention, and detailed description thereof will be omitted. Reference numeral 65 is an unwinding roll drive system when the original roll is set. Further, the rotary drive mechanism other than the illustrated example may be used, for example, a servo motor, an AC motor, a DC motor or the like that does not use a variable speed clutch.

In this embodiment, the ridge 7 of the unwinding roll 1 is made of rubber, but the ridge 7 may be made of synthetic resin or other material. However, if it is made of rubber, the original roll 100 does not slip by the ridge 7 when the original roll 100 is repelled.
There is an advantage that is hit and the rotary motion is efficiently given.

〔The invention's effect〕

As described above, according to the present invention, with the rotational drive in the same direction of the pair of unwinding rolls on which the original roll is placed,
By repeatedly striking the original fabric roll with the ridges provided on the outer peripheral surface of these unfolding rolls and rotating them while flipping up the original fabric roll, the original fabric rolls are continuously unwound at the moment when the original fabric roll is lifted. Resolving the pulled state of the warped sheet material one after another and setting the rotation speed of the unraveling roll to a higher speed than the feeding roll of the unraveled sheet material, and unraveling immediately after the unraveling. By slackening the sheet-like material between both rolls and eliminating the dragged state that remains when unraveling, the sheet-shaped object that has completely eliminated the dragged state can be used as the next spreading table. When the cutter mechanism cuts in a transverse shape, it is possible to reliably avoid a situation in which the cutting edge is deformed into a curved shape. Moreover, instead of interposing a special mechanism for adjusting the pulling state, a simple structure improvement such as providing a ridge on the outer peripheral surface of the pair of unwinding rollers and feeding to a sheet-like object such that the rotational speeds of both rolls are made different from each other. Since the dragged state can be completely eliminated by the improvement of the state, there is an effect that the intended purpose can be achieved without causing an increase in the size of the retraction machine.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing a state in which a material unwound from an original roll placed on an unwinding roll is placed on a feeding roll and hung down, and FIG. 2 is a sectional view of the untwisting roll. 3 (A) and 3 (B) are operation explanatory views, FIG. 4 is a schematic configuration diagram of the rotary drive mechanism, and FIG. 5 is a schematic configuration diagram of a main part of the rotary drive mechanism. 1 ... Unraveling roll, 2 ... Feeding roll, 7 ... Ridge roll,
12 ... Looseness detecting means, 32 ... Feeding roll drive system, 33 ...
… Unwinding roll drive system, 100 …… Original roll, 101 …… Dough (long sheet material).

Claims (1)

[Claims] 1. A pair of disentanglement rolls, which are arranged in parallel with each other, and each of which is formed by winding a long sheet-like material in a roll shape and is driven to rotate in the same direction at the same speed, and a pair of the disentanglement rolls. A sheet-like material that is driven to rotate in the same direction as the unwinding roll and is unwound from the original roll by the rotation is placed and fed in a hanging state to be fed out onto the spreading table, and the pair of untwisting rolls. In a spreading machine equipped with a rotation drive mechanism for driving the roll and the pay-out roll so that the unwinding roll side always rotates at a high speed, in a plurality of positions in the circumferential direction of the outer peripheral surfaces of the pair of unwinding rolls,
A protrusion is provided for rotating the original fabric roll while repeatedly repelling the original fabric roll, and is arranged on the front side of the pair of undeflecting rolls in the unwinding direction of the sheet material. Between the defibrating roll and the feeding roll, the slack detecting means for slackening the sheet-like material defused by the rotational speed difference between the two rolls is provided. Based on the detection signal of the slack detecting means, the rotation speed of the pair of unwinding rolls by the rotation drive mechanism is automatically controlled so that the slack width of the sheet-like material becomes substantially constant. Characteristic spreading machine.