JP5730906B2 - Film fitting device - Google Patents

Description

  The present invention relates to a film fitting apparatus for fitting a cylindrical film such as a label on a fitting body such as a bottle container.

  For example, as a label fitting device for fitting a cylindrical label formed of a shrink film on the body of a PET bottle, a label folded in a sheet shape and a PET bottle are received and the label is opened. However, there is a rotary type label-fitting device on which a plurality of label-fitting heads to be fitted on PET bottles are mounted. Each label-fitting head mounted on this type of label-fitting device is shown in FIG. As shown in (c), the label L opened preliminarily by the label opener 91 is inserted after the four openable / closable shaping rods 92a of the mandrel 92 are closed, and then opened by opening the label L The label L shaped into a predetermined opening shape by the mandrel 92 is formed into a mandrel 92 by a label pressing plate 93. By depressing the barrel 92 is adapted to fit the the PET bottle B positioned immediately below the mandrel 92.

  Also, in recent years, due to the thinning of the label, the label itself is not stiff, and a thin label shaped into a predetermined opening shape by a mandrel cannot be pushed down from the mandrel by the label pressing plate. In place of the label fitting head on which the opening means is mounted, the label L in a folded state as shown in FIGS. 17A to 17F is sucked by two sets of suction rods 95 and 95. After gripping, the two sets of suction rods 95, 95 holding the label L by suction are separated from each other, thereby opening the label L in a folded state in a sheet shape. 95, the label fitting head on which the label opening means 94 for fitting the opened label L to the PET bottle B is mounted is adopted. It has been.

Japanese Patent Laid-Open No. 11-227730 International Publication No. 2010/109535

  By the way, in such a label fitting apparatus, individual labels are cut by sequentially cutting to a predetermined length while feeding a long band-like label forming substrate folded into a sheet shape in which the labels are continuously connected. As shown in FIG. 18, in order to make it easier to open the label cut off from the label-forming substrate, the label-forming substrate M is being fed. However, since the fold portion (hereinafter referred to as the original fold portion) bf formed first is creased by a guide roller or the like in the middle of feeding, it is separated from the label forming base material M. When the outer surface of the thin-walled label is sucked and opened with the suction rod 95, the original folding portion bf tends to be folded inward as shown in FIG. 19 (a). As shown When the opened label L is fitted on the PET bottle B, the original folded portion bf abuts against the shoulder portion of the PET bottle B and buckles, and the opened label L is smoothly and reliably attached to the PET bottle B. There is a problem that it cannot be fitted.

  Accordingly, an object of the present invention is to provide a film fitting apparatus capable of smoothly and reliably fitting a cylindrical film to a fitting body even when the thickness is reduced.

In order to solve the above-described problem, the invention according to claim 1 is a fitting object in which a large number of film fitting heads attached at regular intervals on a concentric circle with a rotation axis as a center are received at a fitting supply position. Is transported to the fit object delivery position, and while the fit object is transported from the fit object supply position to the fit object delivery position, the long belt-like film folded into a sheet is fed and sent Folded halfway and then cut into a predetermined length to receive a cylindrical film that is supplied in a folded state into a sheet shape. In the rotary type film fitting apparatus, each of the film fitting heads has a film opening means for opening a cylindrical film supplied in a folded state, and the film opening From right above of the opening in a cylindrical shape by stages the film, and an air blowing device for blowing initially formed a fold section has a pair of respectively into the film air under folded portion side of the film, said air blowing The means is provided with a film fitting device characterized in that air is blown into the film when the film opened in a cylindrical shape by the film opening means is fitted on the fitting body. To do.

  The invention according to claim 2 is the film covering apparatus according to claim 1, wherein the film opening means includes a plurality of sets of suction rods for sucking and holding the film folded in a sheet shape. In addition, each of the sets of suction rods holding and holding the film is separated from each other, thereby opening the film folded in a sheet shape, and the film opened by the film opening means And it is characterized by being fitted to a to-be-fitted body, maintaining the opening state.

As described above, the film fitting apparatus according to the first aspect of the invention is mounted on each film fitting head at least when the film opened in a cylindrical shape by the film opening means is fitted on the fitting body. and air blowing means, from directly above the opened in the tubular film, because so blowing air respectively to the film in a pair of the original folded portion side is a fold section which has been initially formed in the film When the opened film is fitted to the fitting body, the original folding portion of the film is not easily folded inward, and a downflow is formed along the outer surface of the fitting body located immediately below the film. become. Therefore, since the film to be fitted to the fitted body is fitted to the fitted body while being spread outside the fitted body by the air current, the lower end of the film does not contact the fitted body, and the tube The film opened in the shape is smoothly and reliably fitted to the fitted body.

Further, as in the film fitting device of the invention according to claim 2, the film opening means is provided with a plurality of sets of suction rods for sucking and gripping the film folded in a sheet shape, and sucking and gripping the film. When the film in the folded state is opened by separating each set of suction rods from each other, the opening state of the film is not stable and the film is opened. In addition, the original folding portion tends to fold inward, but the air blowing means mounted on each film-fitting head is directly above the opened film at the first fold portion formed in the film. because so blowing air respectively into the film at a certain pair of the original folded portion side, the original folding portion of the film is hardly folded inwardly, Fi Since the lower end portion of the arm is prevented from abutting on the Hamakarada it will be smoothly and reliably fitted onto Hamakarada. Therefore, this type of film opening means is particularly effective when employed.

It is a schematic perspective view which shows the label covering system which employ | adopted the label covering apparatus which is one Embodiment of the film covering apparatus which concerns on this invention. It is a top view which shows a label covering system same as the above. It is a front view which shows a label covering system same as the above. It is a front view which shows the label supply apparatus which comprises the label covering system same as the above. It is a side view which shows a label supply apparatus same as the above. It is a side view which shows the label fitting head mounted in the label fitting apparatus same as the above. It is a front view which shows a label covering head same as the above. It is sectional drawing along the XX line of FIG. It is sectional drawing along the YY line of FIG. (A) is a front view which shows the label delivery unit mounted in the label fitting head same as the above, (b) is a side view which shows a label delivery unit same as the above. (A) is a front view which shows the label opener mounted in the label fitting head same as the above, (b) is a side view which shows a label opener same as the above. It is a schematic side view which shows the supply path | route part of the air to the blowing nozzle unit of a label covering apparatus same as the above. It is a schematic plan view which shows the supply path | route part of the air to the blowing nozzle unit of a label covering apparatus same as the above. (A)-(c) is explanatory drawing for demonstrating the blowing timing of the air by the blowing nozzle unit same as the above. (A)-(h) is a perspective view which shows the fitting operation | movement of the label by the label fitting head same as the above. (A)-(c) is process drawing which shows the covering operation | movement of the label by the label opener mounted in the conventional label covering apparatus. (A)-(f) is process drawing which shows the label fitting operation | movement by the label opener mounted in the other conventional label fitting apparatus. It is explanatory drawing for demonstrating the return | folding operation | movement of a label formation base material. It is explanatory drawing for demonstrating the problem of the conventional label covering apparatus shown in FIG.

  Hereinafter, embodiments will be described with reference to the drawings. 1 and 2 show a cylindrical shrink label (hereinafter, referred to as a PET bottle (hereinafter referred to as a bottle) B) formed of a heat-shrinkable film having a thickness of 20 μm to 60 μm, which is made of polyester resin, polystyrene resin, or the like. The label fitting system 1 for fitting L is shown. The label covering system 1 includes a bottle supply device 2 including a belt conveyor 6, screws 2a and 2b, and a star wheel 2c, and a long label formed by a substrate supply unit (not shown). The label L is formed while sequentially cutting the base material M, the label supply device 3 for sequentially supplying the label L to the label supply position α, and the bottle B supplied from the bottle supply unit 2 at the bottle supply position β is received. The label L is received from the label supply device 3 at the label supply position α, and the label L is applied to the bottle B while the bottle B is transported from the bottle supply position β to the bottle delivery position γ. A rotary type label fitting device 4 to be fitted, and a bot for carrying out the bottle B in which the label L is fitted by the label fitting device 4 The bottle unloading device 5 is configured to receive the bottle delivery unit including the belt conveyor 6 and the bottle B on which the label L is fitted between the label fitting device 4 and the bottle delivery unit. It is comprised from the bottle delivery unit 5a to deliver.

  As shown in FIGS. 4 and 5, the label supply device 3 continuously feeds a long label-forming substrate M fed from a substrate roll by a substrate feeding unit (not shown). A label base material feeding unit 11 comprising a driving roller 11a driven by a servo motor and a driven roller 11b sandwiching a label forming base material M folded in a sheet shape between the driving roller 11a and the label base material feeding unit. A label comprising a fixed blade 12a fixedly installed at a substrate cutting position and a rotary blade 12b driven to rotate by an independent servo motor, which sequentially cuts the label-forming substrate M delivered by the unit 11 at a predetermined cut pitch. The substrate cutting unit 12 and the label L formed by being cut by the label substrate cutting unit 12 And a upstream belt conveying unit 13 and the downstream belt conveying unit 16 sequentially conveyed to alpha.

  As shown in FIGS. 4 and 5, the upstream belt conveyance unit 13 is stretched between a guide roller 13 a and a drive pulley 13 b disposed near the base material cutting position and near the label supply position α, Two feed belts 13c, 13c that circulate and move between the vicinity of the substrate cutting position and the position near the label supply position α at a speed faster than the supply speed of the label forming substrate M, and the two feed belts 13c , 13c sucks and holds the label L, and the label L is brought into close contact with the feed belts 13c and 13c from the lower end to the upper end in order to suck and hold the label L on the feed belts 13c and 13c. And the driving pulley 13b is rotationally driven by an independent servo motor. It has become.

  As shown in FIG. 5, the feed belts 13c and 13c are arranged in parallel at a distance narrower than the width of the label L to be conveyed, and each of the feed belts 13c and 13c has a central portion in the width direction. A large number of suction holes 13ch are formed at regular intervals along the longitudinal direction.

  As shown in FIG. 4, the suction mechanism 14 includes suction chambers 14a and 14a disposed along the feed belts 13c and 13c between the guide rollers 13a, tubes not shown in the suction chambers 14a and 14a, and the like. And a suction device (not shown) such as a vacuum pump connected via the suction port, and suction ports are opened on the contact surfaces of the suction chambers 14a and 14a with the feed belt 13c.

  As shown in FIG. 4, the suction assisting means 15 is provided so as to face the feed belts 13c and 13c across the conveyance line of the label L, and includes three guide rollers 15a and a drive pulley 15b. The belt 15c is stretched over these belts. The drive pulley 15b is driven by a servo motor that circulates and moves each of the above-described feed belts 13c, and the drive pulley so that the belt 15c circulates at the same speed as the movement speed of the feed belt 13c. A rotational speed of 15b is set.

  The downstream belt conveyance unit 16 is looped over two guide rollers 16a and a driving pulley 16b disposed above and below the label supply position α, and circulates between the upper and lower sides of the label supply position α. The feed belt 16c includes a suction mechanism 17 that sucks and holds the label L on the feed belt 16c. The drive pulley 16b is driven to rotate by an independent servo motor.

  The feed belt 16c is narrower than the label L to be conveyed, and a plurality of suction holes 16ch are formed at regular intervals along the longitudinal direction at the center in the width direction. The central part is sucked and held.

  As shown in FIG. 4, the suction mechanism 17 includes a suction chamber 17a disposed along the feed belt 16c between the guide rollers 16a, and a vacuum pump connected to the suction chamber 17a via a tube (not shown). The suction port is open on the contact surface of the suction chamber 17a with the feed belt 16c.

  The label supply device 3 includes a label detection signal output from a label detection sensor 18 that detects the upper end of the label L delivered from the upstream belt conveyance unit 13 at an upper position of the downstream belt conveyance unit 16, and a rotary type. The label base material delivery unit 11 and the label cutting unit 12 are synchronized with the operation of the label fitting device 4 based on the pulse signal output from the encoder attached to the rotary spindle of the label fitting device 4. A control unit (not shown) for controlling the operations of the upstream side belt conveyance unit 13 and the downstream side belt conveyance unit 16 is mounted. This control unit causes a deviation in the detection timing of the label L by the label detection sensor 18. If there is, the feed bell of the downstream belt conveyance unit 16 is By adjusting the moving speed of 16c, the label L is transported while correcting the deviation of the supply timing of the label L due to the deviation of the label L, and finally the label L is always moved to the label supply position α at an appropriate supply timing. It is supposed to stop.

  As shown in FIGS. 1, 2, 6, and 7, the label fitting device 4 is placed on a support disk 4a attached to a rotating shaft (not shown) on a concentric circle centering on the rotating shaft. A large number of label-fitting heads 20 erected at regular intervals are provided, and each label-fitting head 20 opens a cylindrical label L folded into a sheet shape received at the label supply position α. The opened label L is fitted on the body of the bottle B while the bottle B received at the bottle supply position β is being conveyed to the bottle delivery position γ.

  The label fitting head 20 sucks the bottom of the bottle mounting table 31 mounted on the bottle mounting table 31 and the bottle mounting table 31 on which the bottle B received at the bottle supply position β is fixed. As a result, the bottle holding unit 30 having suction means (not shown) for holding the bottle B on the bottle mounting table 31 and the label supplied to the label supply position α are received via the label delivery unit 40 to form a cylindrical shape. And a label opener 50 for fitting the opened label L to the body of the bottle B. The label delivery unit 40 and the label opener 50 are plate-like erected on the support disk 4a. It moves up and down along a slide rail 22 fixed to the support frame 21.

  The label delivery unit 40 is attached to the base plate 41 and a substantially Y-shaped take-up member 43 fixed to the base plate 41 via a support member 42, as shown in FIGS. A slide guide 45 that moves up and down along the slide rail 22 fixed to the support frame 21 and a cam mechanism 46 that moves up and down the take-up member 43 are provided.

  As shown in FIG. 10A, the take-up member 43 includes a pair of suction rods 44, 44 for sucking and holding one side of the label L. The interval between the suction rods 44, 44 is as shown in FIG. As shown, the label supply position α is set so that it can pass outside the feed belt 16 c of the downstream belt conveyance unit 16 of the label supply device 3.

  A plurality of suction holes 44a are formed in the upper and lower portions of the label holding surface of the suction rod 44 in the center in the width direction, and the vacuum pump is connected via an extendable suction pipe 48 rising from the support disk 4a. It is sucked by a suction device (not shown).

  The cam mechanism 46 includes a cam follower 46a attached to the base plate 41 via a support member 47, and a cam groove formed in a cylindrical body 4b fixedly installed on the inner side of the label fitting head 20 into which the cam follower 46a is fitted. 46b. When the cam follower 46a moves up and down along the cam groove 46b, the slide guide 45 attached to the base plate 41 moves up and down along the slide rail 22. The attached take-up member 43 is moved up and down.

  Accordingly, as shown in FIGS. 3 to 5, when the suction rods 44 of the take-up member 43 rotating together with the label fitting head 20 pass through the label supply position α, the feed belt of the label supply device 3 is used. The label L supplied while being sucked and held at 16c is received by being hooked, and the label L is sucked and held on the label holding surfaces of the suction rods 44 and 44.

  As shown in FIGS. 6 to 9 and FIGS. 11 to 15, the label opener 50 includes a main body unit 52 fixed to the base member 51 and a slide fixed to the support frame 21 attached to the base member 51. A slide guide 82 that moves up and down along the rail 22 and a cam mechanism 83 that moves up and down the main unit 52 are provided.

  The main unit 52 includes an annular upper base 53 and a lower base 54 that are open at the center, and a connecting plate 55 and a connecting rod that connect the upper base 53 and the lower base 54 at predetermined intervals in the vertical direction. 56, suction blocks 57, 57 disposed on the lower base 54 so as to surround the opening and connected to expandable / contractible suction pipes 84, 84 rising from the support disk 4a and having suction paths formed therein. And two upper and lower opening and closing arms 58, 58 that are supported by the upper base 53 and the suction blocks 57, 57 so as to be openable and closable and that have suction paths formed therein and whose tips are bent inward. Opening / closing arms 59, 59 and first to fourth suction rods 60 (60A) extending downwardly attached to the lower surfaces of the front ends of the opening / closing arms 58, 58, 59, 59, respectively. 60B, 60C, 60D), an opening / closing mechanism 67 for simultaneously opening and closing the two sets of opening / closing arms 58, 58 and opening / closing arms 59, 59, and an inner peripheral surface of the annular upper base 53 in a folded state in a sheet shape. And a pair of blowing nozzle units 85 and 85 respectively attached at positions corresponding to the original folding portion of the supplied label L. The first suction rod 60A and the first suction rod 60A attached to one of the open / close arms 58 and 58 are provided. 3, gripping one end side in the width direction of the label L folded in a sheet shape with the suction rod 60 </ b> C (a position on the inner side by about ¼ of the full width of the label L from one side edge of the label L), and the other The other end side in the width direction of the label L folded in a sheet shape by the second suction rod 60B and the fourth suction rod 60D attached to the opening / closing arms 59, 59 (from the other side edge of the label L Only approximately 1/4 of the total width is adapted to grip the inner position). The label delivery unit 40 described above is disposed below the label opener 50. However, when the take-up member 43 is raised, the upper base of the main unit 52 is shown in FIGS. 53 and the lower base 54 are opened through the opening from the lower side.

  As shown in FIGS. 8, 9 and 11, the opening / closing mechanism 67 includes two sets of left and right slide guides 68, 68 and slide guides 68, 68 attached to the upper surface of the upper base 53, and left and right slide guides. 68, 68 and slide guides 69, 69 which are engaged with the slide guides 68, 68 and reciprocated, racks 70, 70 attached to the slide rails 69, 69, and the racks 70, 70, respectively. , Sector gears 71 and 71 attached to the rotary shafts of one of the open / close arms 58 and 58, and the rotary shaft 72 rotatably supported by the upper base 53 and the lower base 54 on the other open / close arm 59 and 59 side, The sector gears 71, 71 attached to the 72 and the flat side attached to the rotating shafts 72, 72 below the upper base 53. From the wheels 73 and 73, the spur gears 74 and 74 attached to the rotation shafts of the other opening and closing arms 59 and 59 meshing with the spur gears 73 and 73, and the advancing and retracting drive mechanism 75 for moving the racks 70 and 70 back and forth. When the racks 70 and 70 are advanced and retracted, the rotation shafts of the opening and closing arms 58 and 58 and the rotation shafts of the opening and closing arms 59 and 59 rotate in opposite directions, respectively, and the opening and closing arms 58 and 58 facing each other and the opening and closing The arms 59 and 59 are opened and closed in the same manner.

  The advancing / retracting drive mechanism 75 includes cam followers 76 and 76 attached to one end side of the racks 70 and 70, cam members 77 having cam surfaces that respectively contact the cam followers 76 and 76 from the other end side of the rack 70, and A cam guide 77 is attached via a base member 78. The slide guide 79 moves up and down along the slide rail 22 fixed to the support frame 21, and one end is connected to one end side of the racks 70 and 70, and the other end is connected. Coil springs 80, 80 that are connected to the upper base 53 and bias the racks 70, 70 to the other end side, and a cam mechanism 81 that raises and lowers the cam member 77 attached to the slide guide 79 via the base member 78. The cam mechanism 81 includes a cam follower 81a attached to the base member 78 and the cam follower. 81a is fitted, and a cam groove 81b formed in the fixedly installed cylindrical body 4b to the inside of the label placement head 20.

  Therefore, when the cam follower 81a moves up and down along the cam groove 81b, the slide guide 79 attached to the base member 78 moves up and down along the slide rail 22 and is attached to the base member 78 accordingly. The cam member 77 moves up and down, and the racks 70 and 70 are advanced and retracted at a predetermined timing by the raising and lowering operation of the cam member 77 and the urging force of the coil springs 80 and 80.

  As shown in FIG. 9, the cam mechanism 83 for moving the main unit 52 up and down includes a cam follower 83a attached to the base member 51, and a cylinder fixedly installed inside the label fitting head 20 into which the cam follower 83a is fitted. The cam follower 83a is moved up and down along the cam groove 83b, so that the slide guide 82 attached to the base member 51 is moved up and down along the slide rail 22. Accordingly, the main body unit 52 attached to the base member 51 is moved up and down.

  The blowing nozzle unit 85 is connected to the upper end of an extendable air supply pipe 86 rising from the support disk 4a via an air supply path and a tube (not shown) formed in the upper base 53. It is attached to the upper base 53 so that the air outlet at the tip faces directly below.

  As shown in FIGS. 12 and 13, the lower end portion of the air supply pipe 86 in each label fitting head 20 is connected via a rotary disc valve 87 and a tube 88 disposed at the center of rotation of the label fitting head 20. The rotary disk valve 87 is connected to an air supply source, and as shown in FIG. 14 (a), the air supply is started slightly before the label L starts to be fitted on the bottle B. As shown in c), when the label L is almost fitted on the bottle B, the supply of air is stopped, so that each label fitting head 20 is shown in FIGS. Only during the state, air is blown from directly above the opened label L by the blowing nozzle unit 85 of each label fitting head 20. 12 and 13, reference numeral 87 a indicates an air supply groove that is formed in the rotary disc valve 87 and supplied with air, and the air supply pipe 86 of each label fitting head 20 includes a tube 88. The air is supplied to the blowing nozzle unit 85 only when communicating with the air supply groove 87a, and the air is blown to the inner portion of the opened label L.

  Hereinafter, operation | movement until the label fitting head 20 of the label fitting apparatus 4 receives the label L and it fits into the bottle B is demonstrated, referring FIG. As shown in FIG. 15A, when the take-up member 43 of the label delivery unit 40 passes the label supply position α, the take-up member 43 is delivered from the upstream belt conveyance unit 13 of the label supply device 3, and the downstream belt conveyance unit. The label L supplied to the label supply position α is received while being sucked and held by the 16 feed belts 16c, and the label L is sucked and held on the label holding surface. At this time, the bottle B on which the label L is fitted is placed on the bottle placing table 31 of the bottle holding unit 30, and the first to fourth suction rods 60A, 60B, 60C of the lowered label opener 50 are placed. , 60D is released from the label L by releasing the suction of the label L.

  Subsequently, as shown in FIG. 15B, the first to fourth suction rods 60 </ b> A, 60 </ b> B, 60 </ b> C, 60 </ b> D of the label opener 50 are at the height position of the label L that is sucked and held by the take-up member 43. 15C, only the open / close arms 58 and 59 on the opposite side of the take-up member 43 with respect to the label L are closed, and the third suction rod 60C and the fourth suction rod are closed. After the label L is sandwiched between the take-up member 43 and the label L is sucked and held, the sucking and holding of the label L by the take-up member 43 is released, so that the label L is removed from the take-up member 43. The suction rod 60C and the fourth suction rod 60D are delivered.

  Thereafter, as shown in FIG. 15 (d), the open / close arms 58 and 59 to which the third suction rod 60C and the fourth suction rod 60D holding the label L are held open are opened, whereby the label L Is separated from the take-up member 43. At this time, the label fitting head 20 is moved to the bottle carrying-out position γ, and the bottle B on which the label L is fitted, which is placed on the bottle placing table 31 of the bottle holding unit 30, is the bottle carrying-out device 5. Is delivered to a bottle delivery unit comprising a belt conveyor 6 by the bottle delivery unit 5a.

  Subsequently, the label fitting head 20 moves to the bottle supply position β, and, as shown in FIG. 15E, a new bottle B is supplied to the bottle mounting table 31 of the bottle holding unit 30, and the label delivery unit. 40, when the take-up member 43 is retracted from the suction holding position of the label L by the third suction rod 60C and the fourth suction rod 60D, as shown in FIG. When the open / close arms 58, 58 and the open / close arms 59, 59 are mutually closed, the label L is formed by the first suction rod 60A, the second suction rod 60B, the third suction rod 60C, and the fourth suction rod 60D. Hold by suction.

  Thereafter, as shown in FIG. 15 (g), the two sets of opening / closing arms 58, 58 and the opening / closing arms 59, 59 are opened to each other, whereby the first suction rod 60A, the second suction rod 60B, and the third After the suction rod 60C and the fourth suction rod 60D open the label L, as shown in FIG. 15 (h), the label delivery unit 40 and the label opener 50 are lowered, so that the first suction rod 60A and A label L opened by the second suction rod 60B, the third suction rod 60C, and the fourth suction rod 60D is fitted on the body of the bottle B sucked and held on the bottle mounting table 31. The At this time, as shown in FIGS. 14A to 14C, air is blown from directly above the opened label L by the blowing nozzle unit 85 of each label fitting head 20.

  In this way, when the label L is fitted on the bottle B, after that, the bottle B fitted with the label L is performed by executing the steps shown in FIGS. 15 (a) to 15 (d). It is delivered to the bottle carry-out device 5.

  As described above, when the label L opened in a cylindrical shape by the label opener 50 is fitted to the bottle B, the label fitting apparatus 1 starts labeling a little before starting to fit the label L to the bottle B. The blowing nozzle unit 85 mounted on each label fitting head 20 airs into the label L from directly above the label L opened in a cylindrical shape for a certain period of time until the L is almost fitted to the bottle B. Therefore, when the opened label L is fitted on the bottle B, a downflow is formed along the outer surface of the bottle B located immediately below the label L. Therefore, since the label L to be fitted to the bottle B is fitted to the bottle B while being spread outside the bottle B by the air current, the lower end of the label L does not contact the shoulder of the bottle B, Even a thin label L having a thickness of 20 μm to 40 μm and having no waist can be smoothly and reliably fitted to the bottle B. This is particularly effective when an ultra-thin label having a thickness of 20 μm to 30 μm is fitted.

  Actually, in a label mounting apparatus having 5 heads, each label-covered head is used for a certain period of time from when the label L is almost completely fitted to the bottle B until a little before the label L starts to be fitted to the bottle B. The blowing nozzle unit 85 mounted on 20 performs the fitting operation 20 times for each of the case where the air is blown into the label L from directly above the cylindrically opened label L and the case where the air is not blown. The total number of bottles B was verified whether or not a mounting failure occurred, and the results are shown in Tables 1 and 2. In addition, glue (3M spray paste 55 (registered trademark)) is sprayed on the shoulder portion (portion above 82 mm from the bottom portion) of the bottle B in order to approximate the surface property of the bottle immediately after manufacture.

  As can be seen from Table 1 and Table 2, it is mounted on each label fitting head 20 for a certain period of time from when the label L starts to be fitted onto the bottle B to when the label L is almost fitted onto the bottle B. In the case where the blown nozzle unit 85 blows air into the label L from directly above the cylindrically opened label L, out of 100 bottles B, the number of bottles with the label L properly attached is 93. When the air is not blown against the average average wearing rate of 93%, only 35 bottles B that are properly fitted with the label L out of 100 bottles B The overall average wearing rate was 35%. From this result, the blowing nozzle unit 85 mounted on each label fitting head 20 for a certain period of time from when the label L starts to be fitted onto the bottle B to when the label L is almost fitted onto the bottle B. However, it has been demonstrated that the incidence of defective mounting of the label L can be greatly reduced by blowing air into the label L from directly above the label L opened in a cylindrical shape.

  Further, like the label fitting device 1, the label opener 50 is provided with a plurality of sets of suction rods 60 for sucking and gripping the label L in a state of being folded into a sheet shape. When each set of suction rods 60 is separated from each other to open the label L in a folded state in a sheet shape, the opening state of the label L is not stable and the label L is opened. The original folded portion bf tends to be folded inward when the air is blown into the label L from directly above the opened label L, so that the original folded portion bf of the label L is folded inward. Since the lower end portion of the label L does not come into contact with the shoulder portion of the bottle B, the bottle B is fitted smoothly and reliably.

  In particular, in this label fitting apparatus 1, when the label opener 50 opens the label L, the blowing nozzle unit 85 is arranged on the original folding part bf side of the label L, and the vicinity of the original folding part bf side of the label L Since air is blown onto the front side, the effect that the original folding portion bf of the label L is difficult to be folded inward is obtained.

  In this label fitting system 1, since the label delivery unit 40 is mounted on the label fitting head 20, the label L can be delivered from the label delivery unit 40 to the label opener 50 in a stable state. When the label L is delivered from the label delivery unit 40 to the label opener 50, there is an effect that the positional deviation of the label L hardly occurs.

  In the above-described embodiment, the label fitting device 1 on which the label opener of the type that sucks and opens the outer surface of the label L with the suction rod 60 is described. However, the present invention is not limited to this. As shown in FIG. 16, a label covering device on which a mandrel type label opener having an openable / closable shaping rod as shown in FIG. 16 can also be applied to the label thinning by applying the present invention. However, it goes without saying that a blowing nozzle unit must be provided for each label fitting head so that air is blown from directly above the opened label.

  Moreover, although embodiment mentioned above demonstrated the label fitting system 1 for fitting the cylindrical label L to the trunk | drum of the bottle B, it is not limited to this, This invention is cylindrical. Needless to say, this film can be applied to the case where the film is fitted to various kinds of objects to be fitted.

  The present invention can be applied when a thin film having no waist is fitted on a bottle container or the like.

DESCRIPTION OF SYMBOLS 1 Label fitting system 2 Bottle supply apparatus 3 Label supply apparatus 4 Label fitting apparatus (film fitting apparatus)
4a Support disk 4b Cylindrical body 5 Bottle unloading device 6 Belt conveyor 11 Label base material delivery unit 12 Label base material cutting unit 13 Upstream belt transport unit 16 Downstream belt transport unit 18 Label detection sensor 20 Label fitting head (film fitting) head)
21 Support frame 22 Slide rail 30 Bottle holding unit 31 Bottle mounting table 40 Label delivery unit (film delivery unit)
41 Base plate 42, 47 Support member 43 Take-up member 44 Suction rod 44a Suction hole 45 Slide guide 46 Cam mechanism 48 Suction pipe 50 Label opener (film opener)
51 Base member 52 Main unit 53 Upper base 54 Lower base 55 Connection plate 56 Connection rod 57 Suction block 58, 59 Opening / closing arm 60A First suction rod 60B Second suction rod 60C Third suction rod 60D Fourth suction ６７ 67 Open / close mechanism 68 Slide guide 69 Slide rail 70 Rack 71 Sector gear 72 Rotating shaft 73, 74 Spur gear 75 Advance / retract drive mechanism 76 Cam follower 77 Cam member 78 Base member 79 Slide guide 80 Coil spring 81 Cam mechanism 81a Cam follower 81b Cam groove 82 Slide guide 83 Cam mechanism 83a M follower 83b Cam groove 84 Suction pipe 85 Blowing nozzle unit 86 Air supply pipe 87 Rotary disc valve 87a Air supply groove 88 Tube B PET bottle (Subject)
L Shrink label (film)

Claims (2)

A number of film-fitting heads mounted at regular intervals on concentric circles around the rotation axis convey the fitting received at the fitting supply position to the fitting delivery position, and Formed by feeding a long belt-shaped film folded in a sheet shape while it is transported from the fitting supply position to the fit object delivery position, and then turning it back in the middle of its delivery, and then sequentially cutting it to a predetermined length In a rotary type film fitting apparatus that receives a cylindrical film supplied in a folded state in a sheet shape, and fits the fitted body while opening the film,
Each of the film fitting heads
Film opening means for opening a cylindrical film supplied in a folded state in a sheet shape;
Wherein from immediately above the apertured film into a tubular shape by the film opening means, and an air blowing device for blowing initially a folded portion that has been formed air respectively into the film at a pair of original folded portion side of the film,
The film covering means characterized in that the air blowing means blows air into the film when the film opened at least in a cylindrical shape by the film opening means is fitted on the fitting body. apparatus. The film opening means includes a plurality of sets of suction rods for sucking and gripping each film folded in a sheet shape,
Each of the sets of suction rods holding and holding the film is separated from each other, thereby opening the film folded in a sheet shape,
The film covering apparatus according to claim 1, wherein the film opened by the film opening means is fitted to the fitted body while maintaining the opened state.

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