JPH081258Y2 - Winding device for strip film - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a winding device for a strip-shaped film, and in particular, it is suitable for winding an unnecessary film melted in the longitudinal direction of the film at the time of packaging work. Regarding the taker.

(Prior Art) Conventionally, for example, in the case where a strip-shaped film provided in a packaging machine is used to wrap a sequentially transferred packaged object, the packaged object is wrapped in a film, and both widthwise ends of the film are welded together. Unnecessary both edges of the film are fused in the longitudinal direction of the film.

Then, the unwound and unnecessary film (scrap) is wound by a winding device provided in the packaging machine.

As shown in FIG. 8, this winding device comprises a rotating shaft 80 which is rotationally driven, and a winding body portion 83 which is composed of a plurality of arms 82 and which is integrally rotatable.

When winding up the scrap 84, the winding body 83 must be so that the wound scrap 84 can be taken out from the winding body 83.
After fitting the cylindrical paper tube 85 onto the 83 from one end, rotate the paper tube 85 together with the take-up barrel 83, and reciprocate the traverser scrap guide (not shown) in the axial direction of the paper tube 85. While scraping, the scrap 84 was wound on the paper tube 85, and the wound scrap 84 was extracted from the winding body 83 together with the paper tube 85 outward in the axial direction.

(Problems to be Solved by the Invention) However, the conventional winding device has the following problems because the scrap 84 is wound around the paper tube 85.

That is, a large number of paper tubes 85 are required for each wound scrap 84.

Further, in general, as the paper tube 85 fitted onto the winding drum portion 83, the one in which a band-shaped film for packaging is wound is used in reality.

However, since the stroke of the traverser scrap guide is constant, when a strip-shaped film having a width smaller than the stroke of the scrap guide is used as a package, the paper tube 85 cannot be used for scrap winding. .

In this case, a large number of paper tubes 85 having a length equal to or longer than the stroke of the scrap guide are separately required, resulting in an increase in cost and a troublesome management.

Furthermore, although the wound scrap 84 can be reused, it is integrated with the paper tube 85 made of a different material, so that it has no practical value as a recycled material and must be disposed of. There are drawbacks.

In view of the above problems, the present invention makes it possible to easily remove the wound film from the winding drum even if the film is wound directly on the winding drum without passing through the paper barrel, and the paper tube is not required. Therefore, it is an object of the present invention to save the cost required for the paper core and the labor of management, and to make unnecessary winding film have a practical value as a recycled material.

(Means for Solving the Problem) In order to achieve the above-mentioned object, the present invention provides a retractable drum portion with a diameter that is freely expandable and contractable,
The main means is that the film wound on the winding body can be pulled out.

As a specific means, a belt-shaped film is attached to the rotary shaft 25.
A winding body portion 37 for winding the 11 is integrally rotatably provided, and the winding body portion 37 includes a pair of body portions 31, 32 which are separable in the axial direction.
The body portions 31 and 32 are formed by forming a plurality of arm portions 30 and 30a, one end of which is a free end, at intervals in the circumferential direction, and the body portions 31 and 32 have one arm. Part 3
The free ends of 0 and 30a are arranged to face each other so as to be located between the other arm portions 30 and 30a, and the free ends of the opposite arm portions 30 and 30a are supported on both body portions 31 and 32 sides. Cone parts 34 and 35 are provided respectively, and by separating the body parts 31 and 32, each arm part 3
Each arm portion 30, 30a has a diameter so that when the free end of 0, 30a is separated from the other cone portion 34, 35, both body portions 31, 32 are tapered so that the film 11 can be extracted. It is configured such that it can be expanded and contracted in any direction.

(Operation) Next, the operation of the winding device will be described.

First, the winding body portion 37 is rotated by the rotating shaft 25, and the film 11 is directly wound around the winding body portion 37. While the film 11 is being wound, the free ends of the arm portions 30 and 30a are pressed against the cone portions 34 and 35 by the film 11, but the cone portions 34 and 35 are free ends of the arm portions 30 and 30a. Is supporting.

Next, after winding the film 11, when separating the winding drum portion 37 outward in the axial direction, each arm portion 30, 30a on one side,
When separated from the other cone part 34, 35, both body parts 31, 32 are in a natural state of tapering in diameter, and the wound film 11 can be easily taken out from both separated body parts 31, 32. Can be rolled up without a paper tube
The 11 can be easily taken out from the body parts 31, 32.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

First, in FIG. 3, reference numeral 1 denotes a pillow type packaging machine, which includes a transfer section 3 and a packing section 5 for packing the packaged object 2 transferred by the transfer section 3 with a synthetic resin band-shaped packing film 4. Is equipped with. The packaging unit 5 has a former 6 for forming the film 4 into a tubular shape, a vertical sealer 7 having a pair of pressure rollers, and a horizontal sealer 7a.

Reference numeral 10 is a winding device for winding up the scraps 11 on both edges in the width direction of the film 4 melted in the longitudinal direction of the strip by the vertical sealer 7, and is provided below the vertical sealer 7.

As shown in FIG. 2, the winding device 10 includes a pair of pulling rollers 13, 13a, a swing actuator 15 for actuating a limit switch 14, a traverser 16, and a winding reel 17.
And.

The swing actuator 15 is swingably provided in the vertical direction with the pin 18 as a fulcrum, and the swing actuator 15 is held by the scrap 11 via the roller 19 by the tension thereof.

Reference numeral 20 denotes a magnet catch for attracting the swing actuator 15, which is provided above the swing actuator 15, and the swing actuator 15 is separated from the limit switch 14 when attracted to the magnet catch 20. .

As shown in FIG. 1, the take-up reel 17 has a drum-like shape having a small diameter in the central portion, and a casing 24 of the take-up device 10 has a bearing 24a.
A fixed reel portion 26 provided on a rotating shaft 25 that is protrudingly supported via a sliding tubular shaft 27 that is externally fitted onto the rotating shaft 25 so as to be removable.
It is structured such that it can be separated in the axial direction from the removable reel section 28 provided in.

The reel parts 26 and 28 have brim-shaped circular side plates 29 and 29a, respectively, the side plate 29 of the fixed reel part 26 is fixed to the base of the rotary shaft 25, and the side plate 29a of the removable reel part 28 is a sliding cylinder shaft. 27 It is fixed at one end.

A plurality of arm portions 3 are provided on the outer peripheral portions of the both side plates 29, 29a.
0, 30a are provided at equal intervals in the circumferential direction,
A fixed body portion 31 is formed by each arm portion 30 on the rotating shaft 25 side, and a detachable body portion 32 is formed by each arm portion 30a on the sliding cylinder shaft 27 side. Further, the both body portions 31, 32 are arranged to face each other so that the free ends of the one arm portions 30, 30a are located between the other arm portions 30, 30a.

34 and 35 are a pair of cone parts, and one cone part 34 is a cylinder 3
It is externally fitted and fixed to the middle part of the rotary shaft 25 via 6, and the detachable body part 3
The second arm portion 30a supports the free end. The other cone portion 35 is externally fitted and fixed to the other end of the sliding cylinder shaft 27 to support the free ends of the arm portions 30 of the fixed barrel portion 31. here,
A winding body portion 37 is configured by the both body portions 31 and 32.

Next, in the body portions 31 and 32 composed of the arm portions 30 and 30a, as shown by the phantom lines in FIG. 30,30a
When the free ends of the
The arm portions 30 and 30a are provided so as to be expandable and contractible in the radial direction of the body portion so that the elastic members 31 and 32 can be reduced in diameter in a tapered manner.

38 and 39 are arm parts 30 and 3 to expand the body parts 31 and 32.
A tapered surface that slides and guides the free end of 0a.
5, the free ends of the arm portions 30 and 30a are supported on the tapered surfaces 38 and 39, respectively.

Reference numeral 40 denotes a latch lever, which is pivotably supported on the outer surface of the side plate 29a of the detachable reel section 28 via a pin 41 as shown in FIG. 4 (a). Engages with the circumferential groove 42 formed at the tip end of the rotary shaft 25, and comes into contact with the stopper 43 protruding from the side plate 29a and the engaging position where the sliding cylinder shaft 27 is prevented from coming off. The position can be freely changed to a retracted position that allows sliding of the moving cylinder shaft 27. Reference numeral 44 is a spring that elastically biases the latch lever 40 to each of the above positions.

Reference numeral 48 is a torque limiter provided on the base side of the rotary shaft 25, and the rotary shaft 25 is mounted on the packaging machine 1 via the torque limiter 48.
It is interlockingly connected to the drive unit of.

That is, as shown in FIG. 5, the torque limiter 48 is a drive sprocket wheel which is built in the casing 24 and is fitted onto the rotary shaft 25 via a bearing 49 so as to be rotatable relative to each other.
50 and a press body 51 that is fitted onto the rotating shaft 25 so as to be relatively non-rotatable and axially slidable. Press plate for press body 51
Reference numeral 54 is formed by pressing a torque adjusting nut 52 screwed onto the base end of the rotary shaft 25 so as to give a constant frictional resistance to the wheel 50.

Therefore, the sprocket 56 of the wheel 50 is interlocked with the drive unit via the chain mechanism, and the drive sprocket wheel 50 is structured to rotate faster while slipping somewhat than the scrap 11 winding rotation of the rotary shaft 25. There is.

In the above configuration, when the scrap 11 generated during the packaging work of the packaged object 2 is to be wound up, first, the detachable reel part 28 of the take-up reel 17 is fixed to the fixed reel part 26 before the packaging machine 1 is operated. Attach to. That is, when the sliding cylinder shaft 27 of the removable reel unit 28 is fitted onto the rotating shaft 25 and pushed in, the latch lever 40
When the inclined surface 45 of the sliding shaft 25 contacts the tip of the rotating shaft 25, the sliding cylindrical shaft 27 is swung in the escape direction.
It slides until 40 engages with the circumferential groove 42 of the rotary shaft 25.

At this time, each arm part 3 of the fixed body part 31 and the detachable body part 32
The free ends of 0 and 30a are tapered surfaces of the other cones 34 and 35.
38 and 39 are slidably guided to expand the diameters of both body parts 31 and 32, the latch lever 40 engages with the circumferential groove 42 of the rotary shaft 25, and the removable reel part 28 is moved to the fixed reel part 26 side. It is installed.

Next, after the blown-out scrap 11 is set in the winding device 10 as shown in FIG. 2, when the packaging machine 1 is operated as shown in FIG. 1 and FIG. At the same time, the take-up reel 17 is rotated, the scrap guide 21 of the traverser 16 reciprocates, and the scrap 11 is taken up directly on the take-up barrel 37.

Next, when taking out the scrap 11 wound up after the winding work is finished as described above, first, the latch lever
With the engagement of 40 disengaged, the detachable reel section 28 is pulled out in the direction opposite to the mounting direction.

At the time of this withdrawal, the force of pressing the arm portions 30, 30a of the film 11 against the cone portions 34, 35 acts on the respective tapered surfaces 38, 39, and the component force acts in the direction of separating the body portions 31, 32. Working, the free end of each arm 30, 30a is
Sliding on the tapered surfaces 38, 39 of.

Then, each arm portion 30, 30a is connected to the other cone portion 34, 35a.
When separated from each other, the body parts 31 and 32 become a natural state in which the elastic force causes the diameters to taper, and the scrap
The 11 can be easily removed from the fixed body portion 31 or the removable body portion 32.

Again, when the scrap 11 is wound up, it is sufficient to mount the detachable reel section 28 as described above, and the subsequent work is carried out by the work procedure described above.

If, during the winding operation of scrap 11, scrap
When the scrap 11 is cut or the scrap 11 is not wound on the take-up reel 17, the swing actuator 15 swings in the arrow direction shown in FIG.
Away from you. Therefore, the limit switch 14 is activated, and the operating packaging machine 1 is automatically stopped.

Further, if the swing actuator 15 is swung in the direction opposite to the arrow, the swing actuator 15 is attracted to the magnet catch 20 and pushes the limit switch 14, so that the packaging machine can be used even when the scrap 11 does not occur. 1 can be kept running.

In the above embodiment, the body portions 31 and 32 are configured by arranging eight round bars in the circumferential direction, but the invention is not limited to this, and as shown in FIG. 6, for example. The fixed body portion 31 and the detachable body portion 32 may be provided by forming a slit 59 in a cylindrical body 58 having a truncated cone shape.

Further, the number of arms 30, 30a may be two, and the number and sectional shape thereof are not limited to those in the present embodiment,
It can be freely set, and in short, the body portions 31 and 32 may be provided so as to be expandable and contractable so that the wound scrap 11 can be taken out.

Moreover, in place of the torque limiter 48, as shown in FIG. 7, a clutch mechanism (so-called powder clutch) 62 that can change the transmission torque to the rotating shaft 25 according to the winding diameter of the scrap 11 is provided, and this clutch is provided. The roller 61 provided at the tip of the swing arm 60 interlocking with the mechanism may be brought into contact with the outer peripheral surface of the scrap 11 being wound up.
According to this configuration, the arm 60 swings as the winding diameter of the scrap 11 increases, the frictional resistance of the clutch mechanism 62 to the rotating shaft 25 increases, and the winding diameter of the scrap 11 increases. There is an advantage that the scrap 11 can be wound with a constant tension.

Further, instead of the swing arm 60, the tension detecting member 63 is provided with a take-up reel 17 and a pull-out roller as shown by a phantom line in FIG.
The winding tension of the scrap 11 may be detected by providing the coil 11 and 13a.

The present invention is the same as the above-described embodiment, but the scrap for the packaging machine 11
It is needless to say that the present invention is not limited to the device for winding the film, and can be applied to a device for winding the strip-shaped film other than the packaging machine.

(Effect of the Invention) In the present invention, the winding barrel is composed of a pair of barrels that are separable in the axial direction, and by separating both barrels, the diameter of the film is tapered so that the film can be taken out. Since it is provided as described above, the wound film can be easily taken out even when the film is directly wound around the winding drum without using a paper tube unlike the conventional case.

Therefore, the paper tube that has been used in the past becomes unnecessary, and the cost and management labor required for the paper tube can be saved.

Further, since the rolled-up film is not integrally provided with the paper tube, when the rolled-up film is an unnecessary scrap, the scrap can have a practical value as a recycled material. .

As described above, the present invention has a unique effect as compared with the conventional one, and its practical value is remarkable.

[Brief description of drawings]

FIG. 1 is a sectional view of a main part of a winding reel showing an embodiment of the present invention, FIG. 2 is a front view showing a winding state of a film, FIG. 3 is a schematic view of a packaging machine, and FIG. 4 (a). Is a front view of the detachable body,
FIG. 4B is a perspective view of the fixed reel portion and the removable reel portion, FIG. 5 is a sectional view of the torque limiter, FIGS. 6 and 7 show another embodiment of the present invention, and FIG. FIG. 7 is a perspective view of a fixed reel part and a removable reel part, FIG. 7 is a schematic explanatory view, and FIG. 8 is a cross-sectional view of essential parts showing a conventional example. 10 …… Winding device, 11 …… Scrap (film), 25…
… Rotation axis, 30,30a …… Arm part, 31,32 …… Body part, 34,34
...... Cone part, 37 …… Winding drum part, 38,39 …… Tapered surface

Claims (1)

[Scope of utility model registration request] 1. A winding barrel portion 37 for winding the strip-shaped film 11 is integrally rotatably provided on a rotary shaft 25, and the winding barrel portion 37 has a pair of barrel portions 31, 32 separable in the axial direction. Consists of
Each of these body parts 31, 32 is formed by forming a plurality of arm parts 30, 30a each having a free end at intervals in the circumferential direction, and the body parts 31, 32 have one arm part 30, 30a. Are arranged so as to face each other so that their free ends are located between the other arm portions 30 and 30a.
A cone portion 34, 35 for supporting the free end of a is provided respectively, and when the free ends of one arm portion 30, 30a are separated from the other cone portion 34, 35 by separating the body portions 31, 32 from each other. Torso 3
A strip-shaped film winding device characterized in that each arm portion (30, 30a) is provided so as to be expandable and contractible in the radial direction of the body portion so that the film diameters of the films (1, 32) can be reduced so that the film (11) can be tapered.