JPH0659967B2 - Spreading method and spreading device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a spreading method and a spreading device for performing so-called front-to-back facing spreading.

[Conventional technology]

The middle front facing fabric is a fabric in which the upper fabric with the outer fabric facing up and the lower fabric with the outer fabric facing down are alternately stacked on the fabric spreading table.

In order to spread the unwound material that has been unwound from the unrolled roll that has been wound into a roll shape on the spreading table, generally, the unwinding process of the unrolled roll and the unwound material that has been unwound on the unrolled table are performed. The step of expanding and the step of cutting and separating the unfolded piece of fabric at a predetermined location are required, and the middle-side-opposite spreading of the above-mentioned pieces of fabric is conventionally performed according to the following procedure.

That is, as shown in FIG. 5 (a), the upper surface cloth article 1a fed from the upper part of the original cloth roll 1 is spread and spread on a spreading table (not shown), and the upper surface cloth article 1a is taken along the broken line XX. And cut it as shown in (b) in the figure, and then (c) in the figure.
As shown in (d), the original roll 1 is inverted around the vertical axis Y, and the cut end 1b is rewound onto the original roll 1. This time, as shown in FIG. The lower surface piece 1a 'fed out from the lower part of the anti-roll 1 is spread on the spreading table and piled up on the already extended upper piece 1a', and then the lower piece 1a 'is drawn along the broken line ZZ. By cutting and separating, one step of the front and back opposite stretching is completed, and then the original roll 1 is reversed and the cut end 1b is rewound to obtain the state of FIG. The above-mentioned process was repeated by feeding out the upper surface piece 1a.

[Problems to be solved by the invention]

However, according to the conventional method, not only the process becomes complicated because it is necessary to invert or rewind the original roll 1 each time the upper and lower surface material 1a and the lower surface material 1b are extended, There has been a problem that it is necessary to provide the spreading device with an accessory mechanism having a complicated structure for performing such complicated steps.

Therefore, the present applicant was able to solve the conventional problems by proposing the spreading device shown in FIG. The fabric spreading device shown in the figure is a raw fabric roll 1 for feeding the upper fabric 1a.
And the original fabric roll 1 ′ for feeding the lower fabric 1a ′ are supported by the respective different original fabric support mechanisms 2 and 2 ′, and the upper fabric 1a and the lower fabric which are fed out from these raw fabric rolls 1 and 1 ′. Fabric 1
After a'is unraveled by the separate unraveling mechanisms 3, 3 ', a separate feeding port 5, constituted by the reciprocating guides 4, 4'.
It is constructed so as to be alternately fed out from 5 '.

6 is a cutter.

In the case of performing the front-to-back opposing spreading, while moving the spreading device in the direction of arrow A from the spreading start position a shown by a virtual line in the figure,
For example, after the uncovered object 1a is unrolled, it is unwound from the unrolling port 5 and spread and unrolled on the unrolling table 7, and when the unrolling device reaches the unrolling end position B shown by the solid line in FIG. After cutting the piece of cloth 1a and then moving the spreading device back (arrow B) to the starting position (i), the piece of cloth 1a 'shown below is unrolled and unrolled from the unwinding port 5'. Spread it on the table 7 and spread it.
A'is cut and piled up on the upper surface piece 1a which has already been stretched. After that, the above steps are repeated.

As is clear from this, when the reversing device shown in FIG. 6 is used to perform the reciprocal front-rear spreading, it becomes unnecessary to invert or rewind the original roll, so that the problem described Is eliminated.

However, according to the spreading device of the same figure, depending on the type of the piece of cloth, the upper surface piece of cloth 1a, 1a 'unwound from the original roll 1, 1'can be overlaid on the unraveling mechanism 3, 3'and the spreading guide. There may be a wavy shape on 4, 4 '. This tendency is particularly remarkable when a thick piece of cloth is spread. In this way, when the piece of cloth has a wavy shape, for example, the upper piece of cloth 1a
While the sheet is being stretched, the corrugated portion of the lower surface piece 1a 'is stretched due to the vibration of the spreading device, and its end 1b' is below the set position (the position cut in the preceding spreading step). May hang down. When such a sagging occurs, when the lower surface piece 1a 'is extended, its end 1
b'displaces largely from the tip of the upper front cloth 1a which has already been stretched. The same situation occurs when the corrugated portion of the upper surface piece 1a 'extends while the lower surface piece 1a' is extended. Therefore, when a thick piece of cloth is spread by the spreading device, as shown in FIG. 7, the tip end of the upper surface cloth 1a and the tip of the lower surface cloth 1a 'which are alternately stacked on the spreading table 7. Often the departments were out of alignment.

The upper surface piece 1a and the lower piece piece 1a ', which are stacked as shown in FIG. 7, are simultaneously cut into a predetermined pattern in a stacked state, but the irregular shape of the tip cannot be included in the pattern shape. Therefore, the part to the right of the broken line X'-X 'is discarded as an unusable part. However, when such a waste portion is generated, the yield of the waste material is reduced, and particularly in the case of an expensive waste material, the waste portion causes a significant increase in cost and is not preferable in terms of resource saving. .

The present invention solves the conventional problems described above by improving the spreading device of FIG. 6 and the spreading method implemented by the spreading device, and of course, can be used with any kind of cloth material. An object of the present invention is to provide a spreading method and a spreading device capable of preventing unevenness in the tip end of the stretched piece of cloth.

[Means for solving problems]

In order to achieve the above-mentioned object, the spreading method of the present invention is characterized in that the following steps (1) to (3) are performed and the respective unwound materials fed from the two original material rolls are alternately stacked on the unrolling table.

It is possible to reciprocate the piece of material unwound from either one of the two material rolls wound in a roll shape between the spreading start position and the spreading end position on the spreading table. Positioning the tip end of the piece of material that is unraveled on the dolly and is fed out by the unraveling in the vicinity of the piece of material unwinding port of the spreading guide provided on the dolly.

After moving the cart from the spreading start position to the spreading end position and unrolling the unwound material fed from one of the original rolls onto the unfolding table and unfolding, cutting a predetermined portion of the unwound material, then , Rewind the piece of cloth to the original roll by a specified width.

Dissolving the piece of material unwound from the other material roll on the trolley, and temporarily positioning the tip of the piece of material unwound by the unwinding in the vicinity of the piece unwinding port.

To move the carriage back from the spreading end position to the spreading start position.

After moving the cart from the spreading start position to the spreading end position and unrolling the unwound material fed from the other original roll onto the unfolding table, and then unfolding it, cut a predetermined part of the unwound material, and then , Rewind the piece of cloth to the original roll by a specified width.

In addition to the basic structure of the spreading device described with reference to FIG. 6, the spreading device of the present invention is unfolded by the trolley by the piece of material that is unfolded by the first unwinding mechanism and the second unwinding mechanism. A common spreading guide is provided for feeding out the piece of material onto the table for spreading, and the tip of the piece of material that has been fed out by the unraveling is detected in the vicinity of the piece-feeding outlet of this piece guide, and its detection signal is detected. A tip position setting sensor for stopping the unwinding of the unwound material from each of the original rolls is provided by a predetermined distance from the unwound material delivery port to the rear side in the unwinding direction of the unwound material when the unwound material is rewound. It is characterized in that a rewind position setting sensor for detecting the arrival of the front end of the piece of fabric and stopping the rewinding of the fabric to the original roll is provided.

[Operation] When facing the front and back sides by the above-mentioned spreading method, the steps → → → → are repeated in this order. In that case, the tip of the upper surface piece of cloth and the lower end of the piece of cloth material are once positioned at fixed positions in the vicinity of the cloth piece feeding opening depending on the process, so the top surface placed on the spreading table at the start of spreading. The tip of the piece of cloth and the tip of the piece of cloth below are at the same position, so that the piled pieces of cloth after spreading have no unevenness of the tip.

The spreading device operates as follows. The upper surface fabric is fed out from one of the material rolls, and the lower surface fabric is fed out from the other material roll.After the leading end of the upper fabric material is unraveled by the first unraveling mechanism, When delivered to the vicinity of the outlet, the tip of the delivered upper surface anti-object is detected by the tip position setting sensor, the detection signal stops the delivery of the upper surface anti-object, and the tip of the upper surface anti-object is set to the above-mentioned anti-object outlet. Positioned in the vicinity. When rewinding the upper surface piece of fabric cut by the cutter, the rewinding position setting sensor detects that the tip of the upper surface piece of fabric has reached a predetermined position by the rewinding, and the detection signal causes the upper side piece of material to wind up. The return is stopped. The same applies to the feeding and rewinding of the following front and back objects. In addition, the middle front facing deflation is, for example, after defusing the upper deflation object with the first defusing mechanism,
Synchronize with the forward movement of the carriage from the spreading start position to the spreading end position, and spread it from the vicinity of the cloth guide outlet of the cloth spread guide to the cloth spreading table through the drawing port, and After being unraveled by the second unraveling mechanism, when the bogie is moved forward from the retraction start position to the retraction end position, in synchronization with that, the retraction table is passed from the vicinity of the cloth object delivery port of the retraction guide through the delivery port and the retraction table. Spread to the top. In order to move to the spreading of the lower facing material after the spreading of the upper facing material, it is necessary to move the carriage back from the spreading end position to the spreading start position.

〔Example〕

 The apparatus of the embodiment of the present invention will be described below.

FIG. 1 is a schematic side view of a spreading device, FIG. 3 is a schematic perspective view of a lateral shake preventing device attached to the spreading device, and FIG. 4 is an explanatory view showing a traverse mechanism of an original fabric supporting mechanism. .

In FIG. 1, reference numeral 10 is a carriage having traveling wheels 11, 11. The carriage 10 includes two original fabric support mechanisms 1
2, 13, the first unwinding mechanism 14, and the second unwinding mechanism 15
The retraction guide 16 and the cutter 17 are provided.

One of the original fabric support mechanisms 12 has an inclined original fabric holder 18a.
The feeding roll 18 supports the original roll R ₁ , and a common frame 19 that supports the original placing table 18 a and the feeding roll 18 can be laterally traversed. An example of the traverse mechanism for that purpose is shown in FIG. The traverse mechanism shown in the figure supports the frame body 19 so as to traverse the guide rods 20 and 20 extending in the width direction of the carriage 10 via guide rollers 21 and 21, and is connected to a motor 23 via a speed reducer 22. The pinion 24 and the rack 25 fixed to the frame 19 side are meshed with each other. The other original fabric support mechanism 13 is configured to support the original fabric roller R ₂ by means of the inclined original fabric holder 26 a and the feeding roll 27. Similar to the case of the one original fabric supporting mechanism 12 described above, a common frame 28 that supports the original fabric placing table 26a and the feeding roll 27 is configured to traverse to the left and right. The first unwinding mechanism 14 is provided on the front and rear rolls 2
A plurality of belts 31 are wound around 9 and 30. The second unwinding mechanism 15 has the same configuration, and
Is a roll and 34 is a belt. The cutter device 17 is provided with a rotary cutting blade capable of traversing left and right at or near the tip of the retraction guide 16. The cloth spreading guide 16 is a common cloth discharging port 35 common to the upper surface cloth R ₁ ′ unraveled by the first unraveling mechanism 14 and the lower surface cloth R ₂ ′ unraveled by the second unraveling mechanism 15. Is equipped with.

A tip position detection sensor 36 is provided in the vicinity of the cloth unwinding port 35 of the spreading guide 16 to detect the tip of the cloth unreeled by the unraveling and stop the unwinding of the cloth by the detection signal. There is. That is, when the tip position detecting sensor 36 detects the tip of the piece of cloth, the forward rotation of the feeding roll 18 or 27 and the first unraveling mechanism 14 or the second unraveling mechanism 15 is stopped. Also,
It is detected that the front end of the unwound material has reached the position where the unwound material has been unwound at a position spaced apart from the unwound material delivery port 35 by a predetermined distance to the rear side in the unwound material feeding direction of the unrolled guide 16 and the original web roll is rolled. A rewind position setting sensor 37 for stopping the rewind of the unwound material to R ₁ or R ₂ is provided. That is, when the rewind position setting sensor 37 detects the front end of the piece of cloth, the reverse rotation of the feeding roll 18 or 27 and the first unwinding mechanism 14 or the second unwinding mechanism 15 is stopped.

Reference numerals 38 and 39 denote lateral shake preventing devices provided corresponding to the two original fabric support mechanisms 12 and 13, respectively. These have the same structure. To explain one of the lateral shake preventing devices 38, as shown in FIG. 3, two sensors 42, one inside and one outside the U-shaped frames 40 and 41 facing each other in the left-right direction are provided. 43, 42, 43 are provided, and the position of the left and right ears of the upper surface cloth R ₁ ′ is detected by these two sensors 42, 43, and when the ears are outside the predetermined range, When this is detected, the rotation direction of the motor 23 shown in FIG. 4 is switched to cause the original fabric support mechanism 12 to traverse left or right to adjust the lateral position of the fabric. Reference numeral 50 is an entrainment stand.

Next, an embodiment method of the present invention will be described with reference to FIGS.

In FIG. 2 (a), the carriage 10 is at the extension end position, the tip of the upper surface piece R ₁ ′ is positioned in the vicinity of the piece material outlet 35, and the lower piece R ₂ ′ is the upper piece piece. It shows the state of being rewound to a position where it does not overlap with R ₁ ′. When the upper surface piece R ₁ ′ and the lower piece piece R ₂ ′ are fed, the original rolls R ₁ and R ₂ are always released by the first unwinding mechanism 14 or the second unwinding mechanism 15. (See FIG. 1).

From the state of FIG. 2 (a), the bogie 10 is returned to the spreading start position as shown in FIG. 2 (b), and then the bogie 10 is just before the spreading end position as shown in FIG. 2 (c). Simultaneously with the forward movement, in synchronization with the forward movement speed, the upper surface anti-object R ₁ ′ is unwound from the anti-object unwinding port 35 and is spread on the anti-inflation table 50. Then, 'after the cutting, and the carriage 10 is further moved forward to the spreading end position as shown in FIG. (D), the above table cloth R _1' above table cloth R ₁ by the cutter 17 against extension of. Above table cloth R ₁ ′
After extension of the anti-termination, the above table cloth R ₁ by reversing the first solution reaction mechanism 14 and the feed roll 18 described in Figure 1 '
Rewind. By this operation, when the rewind position setting sensor 37 detects the leading end of the upper surface piece R ₁ ′, the detection signal stops the reverse rotation of the first unwinding mechanism 14 and the feeding roll 18, and the rewinding operation is performed. finish. This state is shown in FIG.

Next, the second unwinding mechanism 15 and the feeding roll 27 are rotated in the forward direction to feed the lower surface piece R ₂ ′. When the tip of the lower surface piece R ₂ ′ is detected by the tip position setting sensor 36 by this feeding, the second unwinding mechanism 15 is detected by the detection signal.
Then, the forward rotation of the feeding roll 27 is stopped, and the front end portion of the lower surface piece R ₂ ′ is positioned near the piece material feeding port 35 as shown in FIG. The position of the lower surface piece R ₂ ′ at this time is
The position is the same as the position of the upper surface cloth R ₁ ′ described in FIG. From the state of (f) in the figure, the bogie 10 is returned to the spreading start position as shown in (g) of the figure, and then the bogie 10 is moved to the position immediately before the end position of spreading as shown in (h) of the figure. At the same time as it is moved, the lower surface piece R ₂ ′ is fed out from the piece material outlet 35 in synchronism with the forward speed, and the upper surface piece already extended
Spread over R ₁ ′. Then, 'after the cutting, and the carriage 10 is further moved forward to the spreading end position as shown in FIG. (Li), table cloth R _2' table cloth R ₂ by the cutter 17 against extension of. After the unfolding of the lower surface unfolded material R ₂ ′, the second unraveling mechanism 15 and the feeding roll 27 are reversed to reverse the lower surface unfolded material.
Rewind R ₂ ′. By this operation, when the rewind position setting sensor 37 detects the front end of the lower surface piece R ₂ ′,
The detection signal stops the reverse rotation of the second unwinding mechanism 15 and the feeding roll 27, and the rewinding ends. This state is shown in FIG. With the above, one step of the front-to-back spreading is completed.

In addition, the cutter 17 is connected to the cloth-feeding outlet 35
Since it is possible to cut a piece of cloth at the end position of spreading, it is the same as the operation of moving the carriage 10 from the state shown in FIG. 2C to the state shown in FIG. Figure (h)
It is possible to omit the operation of moving the trolley 10 from the above state to the state shown in FIG.

〔The invention's effect〕

As described above, according to the spreading method of the present invention, the troublesome operation of rewinding and reversing the original roll becomes unnecessary. In addition, since the tip of each piece of cloth is always positioned at the same position at the start of spreading, even when a thick piece of cloth that easily causes a wavy slack is face-to-face in the opposite direction, any other kind of Even if the cloth for cloth is spread opposite to the front surface, the cloth piled up on the cloth spreading table does not have uneven tip portions, which contributes to cost reduction and resource saving.

Further, according to the spreading device of the present invention, the spreading method can be efficiently performed.

[Brief description of drawings]

FIG. 1 is a schematic side view showing a spreading device according to an embodiment of the present invention, FIGS. 2 (a) to (n) are explanatory views of a spreading method according to an embodiment of the present invention, and FIG. FIG. 4 is a schematic perspective view of a lateral shake preventing device attached to the apparatus, FIG. 4 is an explanatory view showing a traverse mechanism of the original fabric support mechanism, and FIGS. FIG. 6 is an explanatory view showing a method, FIG. 6 is a schematic view showing a spreading device for front and back facing spreading developed by the inventor prior to the spreading device of the present invention, and FIG. FIG. 7 is a state explanatory view in the case where the front end of the upper surface piece and the lower surface piece of the bottom piece are not aligned and are extended. 10 ... Cart, 12, 13 ... Original fabric support mechanism, 14 ...
First unwinding mechanism, 15 ... Second unwinding mechanism, 16 ... Spreading guide, 17 ... Cutter, 35 ... Disposal material outlet, 36 ...
... Tip position setting sensor, 37 ... Rewind position setting sensor, 50 ... Spreading table, R ₁ , R ₂ ... Original roll.

Claims (2)

[Claims] 1. A method for spreading fabrics, characterized in that the following steps (1) to (3) are performed, and the respective unwound fabrics fed from two original fabric rolls are alternately stacked on a spreading fabric table. It is possible to reciprocate the piece of material unwound from either one of the two material rolls wound in a roll shape between the spreading start position and the spreading end position on the spreading table. Positioning the tip end of the piece of material that is unraveled on the dolly and is fed out by the unraveling in the vicinity of the piece of material unwinding port of the spreading guide provided on the dolly. After moving the cart from the spreading start position to the spreading end position and unrolling the unwound material fed from one of the original rolls onto the unfolding table and unfolding, cutting a predetermined portion of the unwound material, then , Rewind the piece of cloth to the original roll by a specified width. Dissolving the piece of material unwound from the other material roll on the trolley, and temporarily positioning the tip of the piece of material unwound by the unwinding in the vicinity of the piece unwinding port. To move the carriage back from the spreading end position to the spreading start position. While moving the cart from the spreading start position to the spreading end position, the unwound material fed from the other original roll is unwound onto the unfolding table and then unrolled, and then the predetermined location of the unwound material is cut, and then , Rewind the piece of cloth to the original roll by a specified width. 2. A two original fabric supporting mechanism for separately supporting two original fabric rolls in which a piece of fabric is wound in a roll shape, and a first unraveling mechanism for unwinding the unfinished fabric fed from one of the original fabric rolls. , The second unwinding mechanism for unwinding the unwound material unwound from the other original roll and the cutter for cutting a predetermined portion of the unwound material unwound onto the unrolling table start unrolling on the unrolling table A retraction device equipped on a bogie capable of reciprocating between a position and a retraction end position, wherein the revolving device is repelled by the first resolving mechanism and the second repelling mechanism by the carriage. A common spreading guide is provided for feeding out the unwound material on the unrolling table, and the tip of the unwound material that has been unwound by unraveling is detected in the vicinity of the unwound material delivery port of this unrolling guide. The detection signal picks up the material from each material roll. A tip position setting sensor for stopping the protrusion is provided, and at a position separated by a predetermined distance from the cloth material feeding port to the rear side in the cloth material feeding direction,
An unwinding device, which is provided with a rewinding position setting sensor that detects that the tip of the unwound material has reached when the unwound material has been unwound and stops the unwinding of the unwound material to the original roll. .