JPS5827183B2 - Web roll rewinding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a web roll unwinding device, and in particular to an improved web roll unwinding device that automatically guides the leading end of a web wound into a roll in the unwinding direction. Regarding the return device.

The web roll referred to in the present invention refers to paper that is relatively long and has a wide flexibility ratio, synthetic paper, vinyl chloride, vinyl acetate, polyethylene, polyethylene terephthalate, Teflon, styrene, polypropylene, triacetyl cellulose, etc. The web roll is cut into relatively narrow widths, usually from 20 rran to 200 rran, depending on its use, and then wound around a winding core in a coil or loop shape. It also includes those with a coating film layered on one or both sides depending on the use.

When the web roll is further processed in the next process, it is mounted on a rotating shaft generally called an unwinding shaft and unwound continuously or intermittently, but each time the web roll is completely unwound, the next process is performed. It is necessary to replace the old and new web rolls, and in order to improve the efficiency of the above-mentioned unwinding operation, it has been strongly desired to replace the old and new web rolls quickly.

In order to meet this demand, the inventors of the present invention, as shown in FIG. A roll supplying means 1 that sequentially extrudes in the direction of arrow A along a core C and a tip thereof facing the tip of the roll support shaft 2 on the same axis with a slight gap and rotatably supported on a cantilever. After the rewinding shaft 5 is moved in the direction of the arrow B by the slide means 6 to connect the ends of the roll support shaft 2 and the rewinding shaft 5 as if they were one shaft, the extrusion means 3 is moved in the direction of the arrow B. When one of the web rows /1/R pushed out in the direction of A is transferred onto the unwinding shaft 5, it is returned in the direction of arrow A by the sliding means 6 and is completely separated from the roll support shaft 2. He invented a web roll rewinding device characterized by comprising a rewinding means 4, and disclosed it in Japanese Patent Application No. 51-125480.

As a result, it has become possible to more quickly and accurately perform the web roll replacement work in the web roll unwinding process described above, and the throughput of the entire unwinding process has also been improved.

However, in order to further improve the throughput and rationalize the unwinding process, it is desirable to increase the unwinding speed of the web roll, and to further reduce the idle time associated with changing the web roll. In the rewinding device, emphasis has been placed on automatically feeding the web roll to the rewinding shaft. It is necessary to pull out the leading end of the web to a predetermined position on the downstream side and prepare for unwinding, and the preparation time occupies a large proportion of idle time. Shortening preparation time and reducing the number of personnel was a major challenge.

An object of the present invention is to solve the problems associated with the conventional rewinding device described above, and to provide a rewinding device that has a relatively compact structure and can automatically pull out the leading end of the web to a predetermined rewinding position. It is something to do.

The object of the present invention is to provide a first plate 71 that can freely contact and detach from the outer peripheral surface of the web roll at a predetermined wrapping angle.
/) a conveyor, and a second belt that is located downstream of the first belt conveyor and that cooperates with the first belt conveyor so that a part of its upper surface can come into contact with and detach from the outer peripheral surface of the web roll; A web comprising a conveyor, wherein the first and second belt conveyors in contact with the outer peripheral surface of the web roll automatically guide and unwind the leading end of the web in a desired direction. This is achieved by a roll unwinding device.

Hereinafter, one embodiment of the apparatus of the present invention will be described in detail with reference to the attached drawings.

2 and 3 are partially cutaway side views of the main parts of the apparatus of the present invention, and FIGS. 4 and 5 are front views of the main parts.

The schematic configuration of the device of the present invention is as follows.

When the prerequisite is to unwind the web roll R which has been previously wound on the winding core 7 in a clockwise direction,
The apparatus of the present invention has a first belt conveyor 10 on the right side of the web roll R and a second belt conveyor 40 on the lower left side thereof, as shown in FIGS. 2 and 3. The first and second belt conveyors 10, which will be described later, are
The upper surfaces of the endless belt constituting the endless belt and the support plate constituting the second belt conveyor are all disposed so as to be able to come into contact with each other along the center line C1 in the width direction of the web roll R.

1) First Belt Conveyor The first belt conveyor 10 includes a bracket 11 fixed diagonally above and to the right of the web roll R, a rotating shaft 12 that passes through a vertical side surface of the bracket 11 and is rotatably supported. a support plate 13 that is vertically suspended from one end of the rotation shaft 12 and rotates together with the rotation shaft 12; another rotation shaft 14 that passes through the lower vertical side surface of the support plate 13 and is rotatably supported; The rotary shaft is placed on the other rotary shaft 14 at a distance from the left side surface of the support plate 13 (in FIG. 4) so that an actuator 27 and an actuating lever 23 of a tension 7"-reel 25, which will be described later, can be disposed thereon. 140 An upper arm 15 and a lower arm 16 supported adjacent to each other so as to be able to swing independently of rotational movement, each of said arms 15 and 16
Support shafts 17 and 1 protruding from the left side surface (Fig. 4) of each tip of
Belt pulleys 19.19.20.20 are rotatably supported in pairs by 8, and a pair of belt pulleys 19.19.20.20 are pivoted near one end of the other rotating shaft 14. j-21,21
゜A support shaft 2 protruding from the left side surface of the support plate 13 (Fig. 4)
A support shaft 24 protrudes in the same direction as the support shaft IL1B from the side surface of the distal end of the actuation lever 23, which is swingably supported by the support shaft IL1B.
, a pair of tension pulleys 25.25 rotatably supported by the support shaft 24, and the tension pulley 2
A spring 26 always biases the arm 15, 16 counterclockwise, each end of which is fixed to the right side surface (FIG. 4) of each arm 15, 16, and each arm 15, 16 is connected to the other rotating shaft 14. an actuator 27 for opening and closing a sea urchin like a compass at the center, and an elastic protrusion 2 located in front of the belt pulley 20, 20 and attached to the tip of the lower arm 16.
8. A stopper 29 located below the lower arm 16 and against which the lower end of the elastic protrusion 28 can come into contact;
5, 25 (two endless bells) 30, 30, a lever 31 pivotally attached to the other end of the rotating shaft 12, another actuator 32 having a rod connected to the tip of the lever 31, and the A belt drive motor 35 is provided in which a motor pinion 34 is meshed with a gear 33 mounted on the other end of the other rotating shaft 14.

As described above, the two endless belts 30, 30 are stretched along the center line C□ with a slight gap between them.

When the first belt conveyor 10 is not in operation, that is, in a standby state, as shown in FIG.
9. Each bell mounted between 19 and 20°) 30.
30 is separated from the right side of the web roll R so as not to contact the web roll R.

In this detachment operation, by pressing a detachment operation start button (not shown), the belt drive motor 35 is first stopped and the counterclockwise drive of the endless belt 30° 30 is stopped, and then the actuator is stopped. 27 operates to push out the rod, maximizing the opening angle θ of each arm 15, 16 with respect to the web roll R, and then the other actuator 32 operates to push out the rod, and the support plate 13 A sequence control circuit (not shown) provided for causing a slight rocking displacement in the counterclockwise direction is activated, and this activation state is maintained until a contact activation start button (described later) is pressed. .

Next, the web roll R is moved to the unwinding shaft 5 of the unwinding means 4.
Further, the web tip R1 of the web roll R is attached to the diameter of the web roll R when the first belt conveyor 10, which will be described later, is in operation, that is, in contact with the first belt conveyor 10. When it is confirmed that the first belt conveyor 10 is located within the opening angle θ which decreases accordingly, a contact operation start button (not shown) is pressed in order to shift the first belt conveyor 10 to the operating state.

When the contact operation start button is pressed, the supporting plate 13 is slightly swung clockwise in the completely reverse order of the detachment operation described above, and the endless bell 30.30 is moved to the outer peripheral surface of the web roll R. and then the belt boot IJ
-19° The rod of the actuator 27 is pulled back so that 19 and 20.20 come as close as possible to the outer peripheral surface of the web roll R, and then the endless bell) 30
．． Another sequence control circuit (not shown) is activated to drive 30 counterclockwise.

Due to the above-described contact operation of the first belt conveyor 10, the web roll R comes into contact with the endless belt 30, 30, as shown in FIGS. 3 and 6, and a clockwise rotational force is applied to the outer peripheral surface. The web tip R1, which is transmitted and pressed against the outer peripheral surface of the web row/I/R by the endless belts 30, 30, also moves clockwise and eventually passes above the belt pulleys 20, 20.

The above-described contact operating state of the first belt conveyor 10 is maintained until the detachment operation start button is pressed.

In addition, in order to keep the tension of the endless bell 30.30 constant even during the contacting and detachment operations of the first belt conveyor 10, the tension pulley 25.25 is connected to the support shaft 2.
2 as the center.

2) Second Belt Conveyor The second belt conveyor 40 is swingably supported by a support shaft 41 fixed diagonally to the lower left of the web roll R, and is connected to each endless belt 30 in the first belt conveyor 10. A support plate 42 having an upper surface that is slightly narrower than the gap of 30° and extends above the elastic protrusion 28.
, belt pulleys 43, 43 and 44., which are suspended from the lower surface of the support plate 42 so as to be parallel to each other and on the same level as the upper surface of the support plate 42.
44 (two endless bells) 45, 45, a gear 47 mounted on one end of the rotating shaft 46 to which the belt pulley 44, 44 is attached, and a motor pinion (not shown) attached to the gear 47. Engaged belt drive motor 4
8. A suction means 50 having an opening 49 formed in the upper surface near the tip of the support plate 42, surrounding the opening 49 from below in a funnel shape and communicating with a decompression system (not shown), and the support plate The other end 51 of 42 contacts the second belt conveyor -
A stopper 52 is provided to set the standby position of the entire 40.

The second belt conveyor 40 is in a standby state,
As shown in FIG. 2, the support plate 42 is detached below the web roll R so that the upper surface of the support plate 42, which faces the outer peripheral surface of the web roll R, does not come into contact with the outer peripheral surface of the web roll R. ing.

This detachment operation and contact operation are caused by four swinging movements of the second belt conveyor 40 due to its own weight around the support shaft 41, which causes the lower arm 1 of the first belt conveyor 10 to
This is done in combination with the four oscillations about the rotating shaft 14 of No. 6.

Therefore, the tip of the support plate 42 is always positioned downstream of the first belt conveyor 10 and above the elastic protrusions 28, so that the first and second belt conveyors 10.40 The relative positional relationship is set.

When the first belt conveyor 10 enters the contact operating state, the upper surface of the tip of the support plate 42 pushed up toward the outer peripheral surface of the web roll R by the upper end of the elastic protrusion 28 When each endless belt 30° 30 in the belt conveyor 10 is inserted into the gap, it comes into contact with the outer peripheral surface of the web roll R in the same way as the belt 30° 30, but due to the elasticity of the elastic protrusion 28, The resistance when the web tip R1 passes over the upper surface easily weakens the degree of contact and allows the web tip R1 to pass smoothly.

Passing the upper surface of the tip end of the support plate 42, the belt boo 'J-20 on the first belt conveyor 10,
The web leading end R1, which has also passed over the belt conveyor 20, begins to come into contact with the endless belts 45, 45 on the second belt conveyor 40 at both end portions thereof.

Note that when the contact operation start button is pressed, the belt drive motor 48 is activated via a relay circuit (not shown) to move the endless belt 45° 45 to the endless belt 30 on the first belt conveyor 10. .30, the internal pressure of the suction means 50 is reduced, and this state is maintained until the release operation start button is pressed.

Therefore, as shown in FIG. 7, the web leading end R1 that has moved to the vicinity of the lowest point of the web roll R1 is moved to the lowermost point of the web roll R1 due to its own weight and the suction force of the suction means 50.
completely separated from the outer circumferential surface of the opening 4, and its central region
While being attracted by the endless bell 45, 45, the tape is moved toward a predetermined unwinding preparation position.

As described above, the web tip R1 of the web roll R is moved along the outer circumferential surface of the web roll R over a relatively long period, usually 1/2 to 1/4 turn, by the first belt conveyor 10. After being guided and rewound, the receiver is automatically connected to the second belt conveyor 40 and pulled out to a predetermined rewinder preparation position, during which time the web tip R
1 is not subject to any direct manual operation.

Moreover, if the web tip R□ of the web roll R prepared in advance in the roll supply means 1 is aligned at a predetermined position, the web roll R transferred to the unwinding shaft 5 can be
Since the position of the web tip R1 is also constant, it is possible to omit position confirmation before pressing the contact operation start button.
By automatically detecting the end of the transfer and supplying the detection signal to the contact operation sequence control circuit, the unwinding preparation operation of the web roll R can be processed fully automatically.

Note that when preparing for rewinding with the web tip R□ lightly attached to the outer circumferential surface of the sea urchin roll R, the degree of vacuum of the suction means 50 is slightly increased, so that the web passing over the opening 49 is It is also possible to separate the web tip R1 from the outer peripheral surface of the web roll R by suction force.

In addition, by driving an endless flat belt with small holes provided above the opening 49, the web tip R described above can be adjusted.
1 can also be separated and transferred more reliably.

Furthermore, for a turret-type unwinding device equipped with a wide web roll, the number of endless bells (30.45) in the first and second belt conveyors 10 and 40 and the upper surface of the support plate 42 It can be applied by appropriately increasing the width and the number of webs according to the width of the web, and in this case, if the rotational force given to the wide web roll from the endless belts 30 and 45 is insufficient, the turret type winding can be applied. An auxiliary drive mechanism is added to the other end of the rewinding shaft constituting the rewinding device to reduce the load on the endless belt 30°45.

Note that the endless bell) 30.45 may be a flat belt or a round belt, especially when the outer peripheral surface of the web roll R is easily damaged by contact with the belt, or when dust adhesion is a problem. A plastic material having a relatively smooth surface and a high coefficient of friction is preferably a polyurethane resin material.

As described above, the apparatus of the present invention guides and rewinds the web tip R1 of the web roll R over a relatively long section along the outer peripheral surface of the web roll R by the first belt conveyor, and then When the web leading end R1 is separated from the outer circumferential surface of the web roll R by the second belt conveyor 40, it is automatically pulled out to a desired unwinding preparation position, so that the web roll R can be replaced and unwinding prepared. It has become possible to significantly reduce the idle time related to the rewinding process, and to reduce the workload of the rewinding preparation personnel, thereby further improving the throughput of the rewinding process.

[Brief explanation of the drawing]

FIG. 1 is a partially cut-away side view of a conventional rewinding device, FIGS. 2 and 3 are partially cut-away side views of a main part of the device of the present invention, and FIG. 4 is a partially cut-away side view of a conventional rewinding device. FIG. 5 is a front view of the first belt conveyor 10 in the device, FIG. 5 is a front view of the second belt conveyor 40 in the device of the present invention, and FIGS. 6 and 7 are for explaining the operation of main parts in the device of the present invention. FIG. 1 is a roll supply means, 4 is an unwinding means, 5 is an unwinding shaft, 10
is the first belt conveyor, 40 is the second Noherto conveyor, R is the web roll, and R□ is the tip of the web.

Claims (1)

[Claims] 1. A web roll unwinding device, comprising: a first belt conveyor having two swingably supported arms and capable of contacting and detaching from the outer peripheral surface of the web roll at a predetermined winding angle; a second belt conveyor that is located downstream of the first belt conveyor and that cooperates with the first belt conveyor so that a part of its upper surface can freely come into contact with and detach from the outer peripheral surface of the web roll; and a first belt. The conveyor includes an elastic protrusion located at the tip of the conveyor, and a support plate disposed between the second belt conveyor. A web roll unwinding system, characterized in that the first and second belt conveyors in contact with the outer peripheral surface of the web roll guide and unwind the leading end of the web in a desired direction by interpolating and connecting the conveyors. Device.