JP2666074B2 - Automatic tension control device for feeding long narrow objects - Google Patents

Description

Description: BACKGROUND OF THE INVENTION (Industrial application field) The present invention relates to an apparatus for feeding a plurality of narrow and long objects with uniform tension.

(Prior art) Ribbons made of narrow fabrics, knits, films, etc.
In the case where a plurality of long objects such as tapes and braids are simultaneously sent to the processing section and subjected to, for example, dyeing or other processing, it is necessary to send each long object in a uniform tension state.

For this reason, conventionally, generally, each long object is once wound around a bobbin with a constant tension, and is supplied while being unwound during processing.

(Problems to be Solved by the Invention) In the above-described conventional means, winding a plurality of long objects with a constant tension before processing not only requires time and labor for the apparatus and operation, but also requires a large amount of time for supply to the processing unit. Since there is a difference in unwinding resistance for each long object, it is still difficult to supply all the long objects to the processing section with uniform tension.

(Means for Solving the Problems) The present invention unwinds the disadvantages of the above-described conventional means and uniformly feeds out the length of each long object when supplying a plurality of narrow objects to the processing section. In this manner, the drive unit (1) having a predetermined length and the same number of narrow pressing members (2) as the plurality of narrow and long objects (a) coming into contact with and separating from the driving roller (1) are used to feed a long object. And a delivery portion B is formed by a pair of pressure contact rolls (3) and (4), one of which is a drive roll, and the rotation speed of the drive roll (1) of the delivery portion A is set to be higher than that of the drive roll of the delivery portion B. A long object a inserted between the driving roll (1) of the feeding section A and each pressing roll (2).
... each dancer member (5) moving up and down a predetermined amount in the middle
And the switches (6) and (7) for detecting the upper and lower positions of the dancer members (5) are provided. When any of the switches (6) for detecting the pressure is closed, the corresponding pressing roll (2) is separated from the driving roll (1), and the upper limit position corresponding to the upward movement of the pressing roll (2). When the switch (7) for detecting the pressure is closed, the pressing roll (2) is returned to a position where the pressing roll (2) is pressed against the driving roll (1).

(Operation) In the above-mentioned apparatus of the present invention, as shown in FIG. 1, pressing rolls (2) respectively opposed to a common driving roll (1).
The narrow and long objects (1), which have been inserted between them, are respectively fed in the direction of the arrow from the feeding section A by bringing the pressing roll (2) into contact with the driving roll (1), and then each of them is in the middle. The dancer member (5) is supported, and is then sent out from the sending-out section B through a pair of pressure contact rolls (3) and (4).

Each of the long objects a is sent out while maintaining a constant tension at the sending speed on the sending portion B side. However, since the sending speed on the sending portion A side is high, the sending amount becomes excessive with respect to the sending amount, so that the dancer member ( 5) is lowered and reaches a predetermined lower limit position. This is detected by, for example, a photoelectric switch (6), and the detection signal activates, for example, a solenoid, an air cylinder, or other control mechanism (8) to cause the pressing roll ( 2) is separated from the driving roll (1). As a result, the feeding operation of the excessively long object a is stopped, but the two rolls (3) of the feeding section B are stopped.
Since the feeding operation of the long object a is continued without interruption by the driving of (4), the long object a is sent out, so that the long object a that has stopped feeding is tense, and therefore the dancer member (5) moves upward. When the predetermined upper limit position is reached, this is detected by the switch (7), and the control signal (8) is switched by the detection signal to switch the pressing roll (2) to the driving roll (1).
, The feeding operation of the long object a is restarted, and with the excessive feeding operation, the dancer member (5) descends and repeats the same operation as described above.

Thus, the plurality of narrow and long objects a... Always form an excess of the long objects a in the subsequent report of the sending unit B by the up and down movement of the dancer member (5) belonging to each of the narrow and long objects a. It is fed at a predetermined feeding speed and therefore with a constant tension. By installing this device at the entrance of the processing section C, a plurality of narrow and long objects can be supplied to the processing with uniform tension and smoothly Especially, it is suitable for a highly elastic material such as a knitted fabric or a rubber material.

Example An example of the present invention will be described with reference to the drawings.

A is the same number of drive rolls (1) having the same length as the number of narrow elongated objects a to be supplied to the processing section C, and the narrow elongated objects a provided so as to be brought into contact with and separated from the drive rolls. A feeding portion for a long object formed by pressing rolls (2) having a short length corresponding to the width of the long object a is shown, and B denotes a pair of rolls (3) (3) ( 4 shows a feeding section formed by the above-mentioned method, and both rolls (3) and (4) have a length that can be shared by a plurality of long objects, and one of the rolls (3) is a drive roll.

After the long object a is inserted between the driving roll (1) of the feeding section A and each pressing roll (2) which comes in contact with and separates from the driving roll (1), a dancer member (5) is supported in the middle between them. The long object a is always supplied to the processing section C at a constant speed of 5 to 20 m / min through the two rolls (3) and (4) of the feeding section B, and the long object from the feeding section A The feeding speed of “a” was always over-feeded at a ratio of, for example, 2: 1 with respect to the feeding speed of the feeding section B.

Each of the pressing rolls (2) in the feeding section A uses a solenoid mechanism as a contact / separation control mechanism (8).
Each pressing roll (2) is connected to this, and the pressing roll (2) is separated from the driving roll (1) by the excitation operation of the solenoid mechanism (8), and the excitation is released, so that the spring (8a) is attached. The pressing member was pressed against the driving roll (1) with a force, and the long object a was fed only during the pressing. In the drawing, (9) indicates a guide roll for the long object a.

Dancer member (5) to be supported on each long object a ...
In the embodiment, as shown in FIG. 4, a long drum-shaped one is shown. However, the present invention is not necessarily limited to this form. For example, a straight rod-shaped one may be used. The cores are aligned without any offset to
There is an advantage that wrinkles and the like can be prevented from being generated in a wide state.

In order to add an appropriate weight to the dancer member (5) according to the type of the long object (a), a 10 to 30 gr separation cylinder (5a) is exchangeably mounted. The groove (5b) is formed on both sides of the cylinder, and the dividing cylinder (5a)
In order to prevent the dancer member (5) from swaying at the time of vertical movement, holes (5c) are provided at both ends, and each dancer member (5) is moved up and down in the hole (5c). It was inserted into a guide rod (10) such as a piano wire stretched in the direction.

The vertical movement amount of each dancer member (5) is set to, for example, about 330 mm, and the photoelectric switches (6) are respectively located at upper and lower positions thereof.
(7) is provided. In the illustrated example, the switches are of a light reflection type, and the switches (6) and (7) detect the upper and lower limit positions of each dancer member (5)... And detect the lower limit position of the dancer member (5). At that time, the solenoid mechanism (8) to which the dancer member (5) belongs is excited by the signal, the pressing roll (2) is separated from the driving roll (1), the feeding of the long object a is stopped, and the upper limit position is set. When it is detected, the excitation of the solenoid mechanism (8) is released, the pressing roll (2) is pressed against the driving roll (1), and the upper and lower limit positions of each dancer member (5) so that the long object a is fed. In, the feeding operation of each long object a is automatically controlled.

(Effects of the Invention) According to the present invention, a plurality of long-length objects are individually driven from a plurality of in-feed portions provided at a common sending-out portion, and the sending-out portion always sends out each long-length object at a constant speed. The part sends excessively long objects to the sending part, so that excess long objects are stored behind the sending part,
The excess amount of the long object is supported by the long object and detected at the position of the dancer member.When the excess reaches the set value, the feeding of the long object is stopped, and when the excess amount falls below the set value, Since the restarting of feeding is automatically controlled, a plurality of long objects can be supplied to the processing unit at a uniform tension without changing the constant-speed feeding operation in the feeding unit. The control operation has the effect of being accurate and the device being simple.

[Brief description of the drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a side view,
FIG. 2 is a front view taken along the line II-II of FIG. 1, and FIG.
FIG. 4 is an exploded perspective view of the dancer member along the line III-III in FIG. A: feeding section, B: feeding section a: narrow and long object, (1) driving roll (2) pressing roll, (3) (4) feeding roll (5) Dancer member, (6) (7) ... Switch

Claims (1)

(57) [Claims] 1. A feeding part A for a long object is formed by a driving roller (1) having a predetermined length and a plurality of narrow pressing members (2) which are in contact with and separated from the driving roller (1). The delivery portion B is formed by a pair of pressure contact rolls (3) and (4) each having a drive roll, and the rotation speed of the drive roll (1) of the delivery portion A is higher than that of the drive roll of the delivery portion B. A long member a ... inserted between the drive roll (1) and each pressing roll (2) of the feeding section A is fed out through the dancer member (5) which moves up and down by a predetermined amount in the middle. And the switches (6) and (7) for detecting the upper limit position and the lower limit position of each dancer member (5) are provided so as to detect the lower limit position. When the switch (6) is closed, the corresponding pressing roll (2) is driven. When the switch (7) for detecting the upper limit position corresponding to the upward movement of the pressing roll (2) is closed, the pressing roll (2) is pressed against the driving roll (1). And a tension adjusting device for feeding a narrow and long object.