JP4114455B2 - Spiral stretch wrapping machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a spiral stretch wrapping machine that wraps around a packaged object in a spiral shape with a stretch film.
[0002]
[Prior art]
The spiral stretch wrapping machine is disclosed in Patent Document 1, and such a spiral stretch wrapping machine swivels a swiveling ring having an inner diameter sufficiently larger than a planar shape of an article to be packaged on a lifting frame that moves up and down along the frame. A stretch film fed out from a roll film supported on the film supply device is wound by freely supporting, attaching a film supply device to the revolving ring, and turning the revolving ring with a motor. Each time the roll film in the film supply apparatus is used up, the worker replaces it with a new one.
[0003]
[Patent Document 1]
JP-A-11-165705
[0004]
[Problems to be solved by the invention]
Since the spiral stretch wrapping machine wraps the article to be wrapped at a faster speed than that of the rotary table type, the roll film is frequently exchanged. It was also a safety issue.
[0005]
The present invention has been considered in view of the above, and an object of the present invention is to provide an automatic film changer capable of solving the above-mentioned conventional problems by mechanically changing a roll film.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the spiral stretch wrapping machine of the present invention supports a turning ring on a lifting frame that moves up and down along a main frame, attaches a film supply device to the turning ring, and turns the turning ring by a motor. By doing so, the packaged object is wrapped in a spiral shape with the stretch film drawn from the film roll held by the holding shaft of the film supply device around the packaged object carried into the turning center of the turning ring. In the spiral stretch wrapping machine, at least one film on a circle in contact with the turning locus of the gripping shaft of the film supply device with respect to the turning center on the turning table at the side of the carry-in position of the package At the position adjacent to the roll mounting table and each roll film mounting table, the frame on each film roll mounting table is placed. The film clamp, which is provided so that the end of the stretch film pulled out from the roll roll can be locked and moved out of the swivel table, and the swivel table are placed on the swivel table. A film roll magazine comprising a turning drive means for intermittently turning to a film roll supply position intersecting with a line connecting the center is disposed, and the film roll core at the film supply position of the film roll magazine is arranged in the film supply device. Inserting into the material from above and gripping the gripping shaft, a film stretching device that pulls out the stretch film from the film roll gripped by the gripping shaft, and the stretch film from the film stretching device to the center side of the swivel ring Energizing tension roller and film feeder frame And a swing arm having a pressing roller for pressing the stretch film on the roller and tension roller of the film stretching device, and provided on the lower surface of the lifting frame and inside the film supply device. A structure in which a stretch device drawn by a film clamp from a film roll at a film roll supply position of the film roll magazine is sandwiched at a position corresponding to the film roll magazine and moved upward from the film supply device. It has become.
[0007]
[Operation]
In the film roll magazine, when the turning table of the film roll is intermittently turned, the film rolls placed on the film roll placing table of the turning table are sequentially moved to the film roll supply position, and the film rolls at this position are moved. The leading edge of the stretch film is pulled out of the swivel table by the film clamp.
[0008]
On the other hand, the film supply device is lowered while aligning the axis of the gripping shaft of the film gripping device with the film roll core at the film roll supply position in a state where the swing arm is opened. . The gripping shaft is inserted into the core material of the film roll, and the film roll is gripped by the gripping shaft by projecting the claw from the outer periphery of the gripping shaft. At the same time, the stretch film drawn by the film clamp is clamped by a clamping device.
[0009]
Next, by closing the swing arm of the film supply device, the stretch film drawn from the film roll holding the holding shaft is stretched along the film stretching device and the tension roller in the film supply device. In this state, by turning the holding device upward while gripping the stretch film, the mounting of the film roll to the film supply device is completed.
[0010]
By turning the swivel ring while raising and lowering the elevating frame in the above state, the stretch film is drawn out from the film supply device while being stretched, and the periphery of the article to be packaged positioned inside the main frame is wrapped with the stretch film. .
[0011]
The turntable of the film roll magazine during the wrapping operation by turning of the turning ring is positioned at the film roll supply position, and is not interfered with by the film supply device or the film roll on the turntable.
[0012]
When replacing the film roll of the film supply apparatus, first, the nail of the holding claw is immersed and the film roll held by the nail is dropped at an appropriate place. In parallel with this, the turning table of the film roll magazine is turned intermittently to place a new film roll placed on the turning table at the film roll supply position. In this state, an operation similar to the operation of attaching the film roll to the film supply apparatus described above is performed.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
In the figure, reference numeral 1 denotes a main frame having four hollow columns 1a, 1b, 1c, 1d at four corners. The main frame 1 extends in the left-right direction on the floor in the middle part in the front-rear direction, and extends in one direction. A conveyor 2 that is configured to travel is supported by a support 3 and installed. Reference numeral 4 denotes an elevating frame which is guided by rails (not shown) provided on the inner side surfaces of the columns 1a to 1d of the main frame 1 so as to elevate.
[0014]
Elevating sprockets 5a, 5b, 5c, and 5d having the same diameter are arranged at the upper ends of the columns 1a to 1d of the main frame 1 so that one tangent line is positioned at the center of each support 1a to 1d. It is provided. The front and rear elevating sprockets 5a and 5c located on the left side are fixed to one elevating shaft 6a rotatably supported by the main frame 1, and the front and rear elevating sprockets 5a and 5d located on the right side. Is fixed to the other elevating shaft 6b rotatably supported by the main frame 1. As shown in FIG. 3, a driven gear 7a is fixed to one lifting shaft 6b, and a drive gear 7b meshing with the driven gear 7a is supported on the main frame 1 side. The shaft 8 of the drive gear 7b and the driven sprockets 9a, 9b are fixedly attached to the other lifting shaft 6a, and are rotated by the lifting motor 10 supported by the driven sprockets 9a, 9b and the main frame 1. A chain 12 is wound around the driving sprocket 11, and when the lifting motor 10 is rotated, the lifting shafts 6 a and 6 b are synchronously rotated in opposite directions.
[0015]
Elevating chains 13a, 13b, 13c, 13d are wound around the elevating sprockets 5a-5d, and one ends of the elevating chains 13a-13d are connected to the corners of the elevating frame 4. The other end is connected to a heavy cone 14 which is slidably inserted in each of the pillars 1a to 1d of the main frame 1 so as to be slidable in the vertical direction. The elevating frame 4 moves up and down with respect to the main frame 1 via the chains 13a to 13d.
[0016]
A swivel ring 15 is supported at a lower portion of the elevating frame 4 through a swivel bearing so as to be pivotable about a vertical axis. A V-belt 16 is wound around the outer periphery of the turning ring 15.
The V-belt 16 is wound around a pulley of a turning motor 17 supported by the elevating frame 4, and the turning ring 15 is rotated by the turning motor 17 via the V-belt 16 in one direction, for example, clockwise when viewed from above. To turn.
[0017]
A film supply device 18 is attached to the lower surface of the swivel ring 15. The film supply device 18 is configured as shown in FIGS. 4 to 6, and is supported in such a manner that the inner surface is spaced below the mounting frame 19 formed in an arc shape along the inner peripheral surface of the swivel ring 15. A support frame 20 composed of plates 20a and 20b is fixed. A swing arm 21, a film gripping device 22, a film stretching device 23, and a tension roller 24 are supported on the support frame 20 in order from the trailing side of the turning ring 15 in the turning direction.
[0018]
The film gripping device 22 has a structure in which a large number of claws 25a are provided on one end portion of the gripping shaft 25 rotatably supported by a support plate 20a on the upper side of the support frame 20 so that the claws 25a can protrude and retract by air pressure. When the film roll A is inserted into the gripping shaft 25 from below, the film roll A is gripped through the core material by projecting the claw 25a.
[0019]
The film stretching device 23 is connected to two stretching rollers 26 and 27 whose both ends are rotatably supported by upper and lower support plates 22a and 20b of the support frame 20, and these rollers 26 and 27 are connected to each other via a connecting means. Film supply motor 28. The connecting means includes a drive sprocket 29 fixed to the output shaft of the film supply motor 28, driven sprockets 30 and 31 fixed to the rollers 26 and 27, and a chain 32 wound around these. The diameters of the driven sprockets 30 and 31 are changed, and the diameter of the driven sprocket 30 on the trailing side is, for example, twice as large as the diameter of the driven sprocket 31 on the leading side in the film drawing direction. Due to the rotation of the supply motor 28, the leading-side stretching roller 27 rotates at twice the number of rotations of the trailing-side stretching roller 26, and the film a passing through both the rollers 26, 27 is rotated around the rollers 26, 27. It is stretched by the difference in speed.
[0020]
The tension roller 24 is rotatably supported at both ends by a rotating arm 34 fixed to a shaft 33 supported at both ends by the upper and lower support frames 20a, 20b of the support frame 20. An arm 35 is fixed to one end of the shaft 33, and a tension spring 36 is connected to the arm 35, and the shaft 33 and the rotating arm 34 are interposed by elastic biasing means such as the tension spring 36. Thus, the tension roller 24 is urged so as to protrude inward of the support frame 20.
[0021]
The swing arm 21 has a base end fixed to a shaft 37 that is rotatably supported at both ends by upper and lower support plates 20 a and 20 b of the support frame 20. The shaft 37 is connected to a motor 38 via connecting means. The connecting means includes a drive gear 39 fixed to the output shaft of the motor 38 and a driven gear 40 fixed to the shaft 37, and the swing arm 21 is moved to the inside of the support frame 20 through the connecting means by the rotation of the motor 38. And a position spaced from the support frame 20.
[0022]
The swing arm 21 enters the periphery of the two stretching rollers 26 and 27 of the film stretching device 23 in a state in which the swing arm 21 is rotated to the support frame 20 side, and corresponds to the first, second, and third press rollers 41a and 41b. , 41c and a fourth presser roller 41d that enters the outside of the tension roller 24 are supported.
[0023]
In FIG. 2, a film roll magazine 45 for supplying the film roll A to the film gripping device 22 of the film supply device 18 is provided on the floor on the rear side of the main frame 1. The film roll magazine 45 is as shown in FIGS.
[0024]
In the figure, reference numeral 46 denotes a turning table which is intermittently turned by a motor 47 through a coupling device made of gears in a clockwise direction every ¼ rotation. The turning table 46 has an upper surface and a turning center. Radius R ₁ Film roll mounting bases 48a, 48b, and 48c are provided at three positions for each 1/4 in the circumferential direction so that the film roll A is vertically placed and can be rotatably mounted. In addition, the remaining one place for every 1/4 in the circumferential direction is a standby position, and an inspection window lid 49 for inspecting the connecting device is provided at this position. Radius R ₁ Is a rotation locus radius R of the gripping shaft 25 of the film gripping device 22 in the film supply device 18 with respect to the center of the turning ring 15. ₂ It is the dimension which touches.
[0025]
A film clamp 50 is provided on each side of the film roll mounting bases 48a, 48b, 48c and on the preceding side of the turning table 46 in the turning direction (right side in this embodiment) so as to be able to protrude and retract with respect to the outer periphery of the turning table 46. is there. The film clamp 50 is provided at the upper end of a pole 52 whose lower end is fixed to the tip of an air cylinder 51 with a guide provided on the lower side of the turntable 46, and each film roll mounting table 48a to 48 is provided in a groove 53 provided therein. The front end of the stretch film a drawn out from the film roll A placed on 48c can be locked.
[0026]
In FIG. 2, a film clamping / cutting device 55 is provided at a position corresponding to the film roll magazine 45 on the lower surface of the lifting frame 4 and inside the film supply device 18. The film clamping / cutting device 55 is configured as shown in FIGS. 9 to 12, and a cutting device 56 is provided in the middle of the turning center of the turning ring 15 in the radial direction, and the holding device is provided outside the cutting device 56. 57, welding devices 58 are respectively arranged on the inner side, and these are provided on a support 59 fixed to the lower surface of the elevating frame 4 through a bracket 60 so as to be rotatable downward from the horizontal state by approximately 90 degrees. ing.
[0027]
As shown in FIG. 10 which is an XX arrow view of FIGS. 9 and 9, the cutting device 56 includes a base 62 that is rotatably supported by a bracket 60 on a support shaft 61, and a base 59 that has a base end. A first cylinder device 64 having the other end connected to the front side of the base 62, a heater arm 65 provided on the bottom surface in the width direction of the base 62, and a heater provided on the bottom surface thereof It consists of a line 66.
[0028]
As shown in FIG. 11 which is a YY arrow view of FIG. 9 and FIG. 9, the holding device 57 includes a holding roller 67 supported at one end rotatably on a bracket 60 by a support shaft 61, and a base end. A second cylinder device 69, which is connected to a bracket 68 fixed to the base 62 of the cutting device 56 and whose tip is connected to the front side of the sandwiching roller 67, and a lower surface of the base 62 so as to face the sandwiching roller 67. It comprises a clamping member 70 provided on the side.
[0029]
As shown in FIG. 12, which is a ZZ arrow view of FIGS. 9 and 9, the welding device 58 includes a crimping bar 71 having one end rotatably supported on a bracket 60 by a support shaft 61, and a base end. A third cylinder device 73 connected to a bracket 72 fixed to the base 62 of the cutting device 56 and having a tip connected to the tip side of the crimping bar 71, and a lower surface of the base 62 facing the crimping bar 71. It comprises a crimp heater 74 provided on the side.
[0030]
In the above configuration, the article B to be carried on the conveyor 2 is stopped at the center of the main frame 1, that is, at the turning center of the turning ring 15. Next, while the swivel ring 15 is swung, the stretch film a supplied from the film supply device 18 provided on the swivel ring 15 is stretched around the packaged item B by moving up and down once from the lowered state. While being wrapped, it is wound twice and stretch-wrapped. The packaged item B after the packaging is carried out by the operation of the conveyor 2.
[0031]
Hereinafter, the stretch wrapping operation will be described in order from the supply of the film roll A from the film roll magazine 45 to the film winding around the package B.
[0032]
A new film roll A is mounted on each of the film roll mounting bases 48a to 48c of the film roll magazine 45 shown in FIGS. 2, 7, and 8, and a standby position without a film roll mounting base is at the standby state. It is directed to the conveyor 2 side. At this time, the tip of the film a of each film roll A is previously locked to the film clamp 50 by an operator.
[0033]
(1) Attaching the film roll A to the film supply device 18 The table 46 of the film roll magazine 45 is rotated by a quarter turn to move one film roll mounting table 48a to a film supply position facing the center of the main frame 1. .
[0034]
Next, the swing arm 21 of the film supply device 18 attached to the turning ring 15 is opened while the elevating frame 4 is lowered, and the holding shaft of the film holding device 22 of the film supply device 18 is turned by turning the turning ring 15. The axis of 25 is made to coincide with the center of the film roll A located at the film supply position of the film roll magazine 45. At this time, the gripping roller 67 is rotated downward by shortening the cylinder device 69 of the clamping device 57 of the film clamping / cutting device 55.
[0035]
In this state, the gripping shaft 25 of the film gripping device 22 is inserted into the film roll A by lowering the lifting frame 4, and the film roll A is gripped by the gripping shaft 25 by the protrusion of the claw 25 a of the gripping shaft 25. At the same time, as shown in FIG. 13, the film clamp 50 that holds the leading end of the stretch film a of the film roll A is protruded by the extension movement of the cylinder 51 with a guide, and the stretch film a of the film roll A is Pull out only a predetermined length.
[0036]
Next, after the lifted frame 4 is lifted slightly and the gripped film roll A is separated from the film roll magazine 45, the cylinder device 64 of the cutting device 56 of the film clamping / cutting device 55 is shortened to move the base 62. Is turned downward. Thereby, the stretch film a drawn out by the film clamp 50 is sandwiched between the sandwiching roller 67 and the sandwiching receiving member 70 of the sandwiching device 57 and cut by the heater wire 66 of the cutting device 56 and pulled out from the film roll A. The leading end of the stretch film a is clamped by the clamping device 57. At this time, the cylinder device 69 of the clamping device 57 is extended in synchronization with the shortening of the cylinder device 64 of the cutting device 56 in order to keep the clamping roller 67 in the clamping position.
[0037]
Next, by closing the swing arm 21, the stretch film a of the film roll A held by the film supply device 18 is stretched by the press rollers 41a to 41d of the swing arm 21 as shown in FIG. , 27 and the kinsion roller 24.
[0038]
In this state, the first cylinder device 64 of the film clamping / cutting device 55 is extended to rotate the entire film clamping / cutting device 55 upward. As a result, the entire film clamping / cutting device 55 is positioned above the winding supply path of the stretch film a to the package B from the film supply device 18 by the rotation of the rotation ring 15. At this time, the clamping device 57 is also rotated upward, so that the leading end of the stretch film a is at a position shifted upward from the winding supply path.
[0039]
When the swing arm 21 is closed, the swivel ring 15 is slightly swung in the direction away from the film nipping / cutting device 55 (counterclockwise) so that it does not interfere with the film nipping / cutting device 55. Keep it.
[0040]
In this way, the film roll A is gripped by the gripping device 22 of the film supply device 18 with the axis of the film roll A being vertical, and the stretch film a drawn from the film roll A includes the stretching rollers 26 and 27 and the tension roller 24. Then, the film is sandwiched by the sandwiching device 57 of the film sandwiching / cutting device 55, and then the film sandwiching / cutting device 55 is turned upward to complete the mounting of the film roll A to the film supply device 18. In this state, the supplied film clamp 50 is immersed.
[0041]
(2) Spiral stretch packaging
The elevating frame 4 is packaged from a state where, for example, the film supply device 18 is lowered to the lower part of the article B to be packaged on the conveyor 2, and the elevating frame 4 is reciprocated in the up and down direction once from this position.
[0042]
(A), (b), (c), (d) in FIG. 14 and (a), (b) in FIG. 15 are exploded views of the packaging operation process. ), The stretch film a is pulled out in a state where the leading end of the stretch film a is sandwiched by the sandwiching device 57 when the film supply device 18 starts to circulate. Then, when the film a has made one turn, the holding roller 67 of the holding device 57 is rotated downward to release the holding of the stretch film a, and immediately before the next turn of the stretch film a comes, it is turned upward. Move.
[0043]
Thereafter, while the elevating frame 4 is raised and lowered, the stretch film a wraps around the packaged object B by turning the film supply device 18 as shown in FIG.
[0044]
When the elevating frame 4 is lowered again to the vicinity of the lowest end, as shown in FIG. 14C, the crimping bar 71 of the welding device 58 is rotated downward to wrap the stretch film a around the outside. . Next, as shown in FIG. 14D, the sandwiching roller 67 of the sandwiching device 57 is rotated downward, and the next stretch film a is wound around the sandwiching roller 67 to stop the swiveling ring 15 from turning. Immediately thereafter, the base 62 of the cutting device 56 is rotated downward, and as shown in FIG. 15 (a), the crimping heater 74 of the welding device 58 provided thereon is brought into contact with the crimping bar 71, The two films a wound around the crimping bar 71 are welded, and the sandwiching member 70 is brought into contact with the sandwiching roller 67 of the sandwiching device 57 to sandwich the stretch film a therebetween. At the same time, the heater wire 66 of the cutting device 56 contacts the stretch film a, and the stretch film a is cut between the welding device 58 and the sandwiching device 57. Thereby, the cut end of the stretch film a on the package side is welded to the preceding stretch film a by the welding device 58, and the cut end of the stretch film a on the film supply device 18 side is held by the holding device 57. At this time, the cylinder devices 73 and 69 of the welding device 58 and the clamping device 57 are extended in synchronization with the shortening of the cylinder device 69 of the cutting device 56. Next, the clamping device 57 is rotated upward together with the cutting device 56 as shown in FIG. 15B, and the leading end of the stretch film a on the film supply device 18 side is lifted upward.
In this state, the elevating frame 4 is lifted so that the pressure bar 71 of the welding device 58 is pulled out from the welded film a, and the space in which the pressure bar 71 is inserted is filled with the shrinkage of the stretch film a. The film a is wound around the package B in a stretched state.
[0045]
In the spiral stretch wrapping, the stretch film a drawn from the film supply device 18 by the swivel ring 15 is drawn while being stretched by the film stretching device 23 driven by the film supply motor 28 of the film supply device 18. Further, the fluctuation in the winding speed of the stretch film a around the article B due to the square shape of the article B to be packaged is absorbed by the position change of the tension roller 24 urged by the tension spring 36. .
[0046]
(3) Replacement of film roll A of the film supply device 18
The film roll magazine 45 during the winding operation of the stretch film a is in a state in which the standby position of the turning table 46 is located on the conveyor 2 side, and the film supply device 18 is placed on the film roll mounting table 48a of the turning table 46. , 48b, 48c so as not to interfere with the film roll A placed thereon.
[0047]
The film roll A is removed and replaced with a new film roll A on the swivel table 46 in a state where the remaining film roll A of the film supply device 18 is equal to or less than a predetermined value due to the winding operation of the stretch film a.
[0048]
When the remaining amount of the film roll A in the film supply device 18 becomes less than a predetermined value, the elevating frame 4 is lowered to the middle portion in the vertical direction, and the turning ring 15 is stopped at a predetermined position, so that the gripping shaft 25 of the film gripping device 22 has a claw. 25a is immersed and this film roll A is dropped.
At this time, the clamping of the leading end of the film a by the clamping device 56 of the film clamping / cutting device 55 is also released.
[0049]
At this time, the table 46 of the film roll magazine 45 is turned to set a new film roll A at the film roll supply position facing the conveyor 2 side, and the film clip 50 is projected to stretch film from the film roll A. Pull out a to the conveyor 2 side.
[0050]
Thereafter, a new film roll A is attached in the same process as the attachment of the film roll A to the film supply device 18 of (1) described above.
[0051]
【The invention's effect】
According to the present invention, the replacement of the film roll held by the film gripping device of the film supply device includes the raising and lowering of the lifting frame, the turning of the turning ring, the operation of the film feeding device and the turning operation of the film roll magazine, and the clamping device By synchronously performing the above, it is possible to perform mechanically, and by wrapping an article to be packaged at a high speed, frequent film roll replacement can be easily and safely performed without burdening the operator.
[Brief description of the drawings]
FIG. 1 is a front view schematically showing a spiral stretch wrapping machine according to the present invention.
FIG. 2 is a side view schematically showing a spiral stretch wrapping machine according to the present invention.
FIG. 3 is a front view showing a lifting mechanism of a lifting frame.
FIG. 4 is a diagram illustrating the configuration of a film supply device.
FIG. 5 is a plan view showing a film supply apparatus.
FIG. 6 is an operation explanatory diagram of a film supply device.
FIG. 7 is a side view showing a film roll magazine.
FIG. 8 is a plan view showing a film roll magazine.
FIG. 9 is a front view showing a film clamping / cutting device.
10 is a view taken in the direction of arrows XX in FIG.
11 is a view taken along the arrow YY in FIG.
12 is a view taken along the line ZZ in FIG.
FIG. 13 is an explanatory diagram showing a film roll supply operation to the film supply apparatus.
14 (a), (b), (c), and (d) are explanatory views showing operation states from the start of packaging with the stretch film to the end of packaging.
FIGS. 15A and 15B are explanatory views showing an operating state of cutting and sandwiching the stretch film at the end of packaging. FIGS.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Main frame, 1a, 1b, 1c, 1d ... Support | pillar, 2 ... Conveyor, 4 ... Elevating frame, 5a, 5b, 5c, 5d ... Elevating sprocket, 6a, 6b ... Elevating shaft, 7a, 7b ... Gear 8 ... shaft, 9a, 9b ... driven sprocket, 10 ... elevating motor, 11 ... driving sprocket, 12 ... chain, 13a, 13b, 13c, 13d ... elevating chain,
DESCRIPTION OF SYMBOLS 15 ... Swivel ring, 16 ... V belt, 17 ... Motor for rotation, 18 ... Film supply apparatus, 19 ... Mounting frame, 20 ... Support frame, 21 ... Swing arm, 22 ... Film gripping apparatus, 23 ... Film stretching apparatus, 24 ... tension roller, 25 ... gripping shaft, 26, 27 ... stretching roller, 28 ... film supply motor, 29 ... driving sprocket, 30, 31 ... driven sprocket, 36 ... tension spring, 41a, 41b, 41c, 41d ... presser roller ,
45 ... Film roll magazine, 46 ... Turning table, 48a, 48b, 48c ... Film roll mounting table, 50 ... Film clamp, 51 ... Air cylinder with guide,
55 ... film clamping / cutting device, 56 ... cutting device, 57 ... clamping device, 58 ... welding device, 59 ... abutment, 60, 63, 68, 72 ... bracket, 61 ... support shaft, 62 ... base, 64, 69, 73 ... Cylinder device, 65 ... Heater arm, 66 ... Heater wire, 67 ... Nipping roller, 71 ... Crimp bar, 74 ... Crimp heater, A ... Film roll, a ... Stretch film, B ... Packaged object.

Claims (1)

An article to be packaged is carried into the turning center of the turning ring by supporting the turning ring on a lifting frame that moves up and down along the main frame, attaching a film supply device to the turning ring, and turning the turning ring with a motor. In a spiral stretch wrapping machine that wraps a package in a spiral shape with a stretch film drawn from a film roll gripped by a gripping shaft of the film supply device,
To the side of the carry-in position of the package,
At least one film roll mounting table on a circle in contact with the rotation trajectory of the gripping shaft of the film supply device with respect to the rotation center on the rotation table, and each film at a position adjacent to each roll film mounting table. A film clamp provided so as to be able to protrude and retract to the outside of the swivel table by locking the tip of the stretch film drawn from the film roll on the roll mounting table;
A film roll magazine comprising: a turning drive means for turning the film table intermittently to a film roll supply position where the film roll mounting table sequentially intersects a line connecting the turning center of the turning table and the turning center of the film supply device. And place
In the film feeder
Inserted into the film roll core at the film supply position of the film roll magazine from above, a gripping shaft for gripping this, a film stretching device for pulling out the stretched film from the film roll gripped by the gripping shaft, and a film A tension roller that urges the stretch film from the stretching device toward the center of the swivel ring, and is rotatably supported by the frame of the film supply device, and presses the stretch film against the roller and tension roller of the film stretching device. A swing arm having a presser roller;
At the position corresponding to the film roll magazine on the lower surface of the lifting frame and inside the film supply device,
A spiral stretch wrapping machine provided with a sandwiching device that sandwiches a stretch film drawn by a film clamp from a film roll at a film roll supply position of a film roll magazine and moves upward from the film supply device.

Images