JP5284890B2 - Film opening shaping unit - Google Patents

Description

  The present invention relates to a film opening shaping unit mounted on a film fitting apparatus or the like for fitting a tubular film such as a shrink label on a fitting body such as a bottle.

  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 having a plurality of label fitting heads that fits on a PET bottle, and each label fitting head can fit a cylindrically opened label on the body of the PET bottle. A label opening shaping unit including a mandrel having four opening / closing rods for shaping into a predetermined opening shape is mounted.

  As shown in FIG. 11, the mandrel mounted on such a label opening shaping unit has an operating shaft 73 having a cam surface with a different outer diameter on the outer peripheral surface with which a cam follower 72 attached to an opening / closing rod 71 abuts. The opening / closing rod 71 is opened / closed by being moved up and down relatively with respect to the support member 80 to which is attached, and the closed opening / closing rod 71 is formed into a label L that is preliminarily opened by a label opener. After the insertion and opening of the opening / closing rod 71, the label L is shaped into a predetermined opening shape, and the label L shaped into the predetermined opening shape is pushed downward by pressing down the label L with the carrier plate. It will fit in the trunk of the waiting PET bottle.

  In addition, as shown in FIG. 11, such a mandrel 70 is replaced with a mandrel 70 as long as the folding diameter of the label L is within a certain range even when the folding diameter of the label L is changed to a certain range. The mounting height of the cam follower 72 with respect to the cam surface of the operating shaft when the label L is most opened can be changed according to the circumferential length of the label L so that it is not necessary to do so. The height can be adjusted.

JP 2008-050018 A

  However, in the case of the mandrel 70 as described above, for example, as shown in FIG. 11B, when the reference label L having a predetermined peripheral length (folded diameter) is shaped, the opened opening / closing rod 71 is parallel. When set to be in the state, in the case of the label L having a larger circumference (folded diameter) than the reference label L, as shown in FIG. In addition, in the case of the label L whose peripheral length (folding diameter) is smaller than that of the reference label L, as shown in FIG. In the case of the label L having a large perimeter (folding diameter), there is a problem that when the label L is pushed down by the carrier plate, there is a problem that the label L is not easily removed from the opening / closing rod 71, and the perimeter (folding diameter) is smaller than the reference label L. In the case of label L, the label is opened from the open opening / closing bar 71. Le L there is a problem likely to fall off.

  Therefore, an object of the present invention is to adjust the opening / closing amount of the opening / closing rod according to the circumferential length of the tubular film, and the opening / closing rod when opened is always parallel regardless of the opening / closing amount of the opening / closing rod. The object is to provide a film aperture shaping unit with a mandrel that can be kept in a state.

  In order to solve the above-described problems, the invention according to claim 1 is a film opening shaping unit including a mandrel that shapes the tubular film into a predetermined opening shape when the tubular film is fitted onto the fitting body. The mandrel includes a base member, a plurality of opening / closing rods inserted into the cylindrical film, a plurality of opening / closing mechanism portions attached to the base member for supporting the plurality of opening / closing rods to be opened and closed, Biasing means for biasing the opening / closing rod in the closing direction, opening / closing means for opening / closing the opening / closing rod supported by the opening / closing mechanism, and an opening amount for adjusting a maximum opening amount of the opening / closing rod by the opening / closing means Adjusting means, and the opening / closing mechanism section has a plurality of parallel link mechanisms arranged radially from the center of the base member, and the parallel link mechanisms have their upper end portions mutually connected to the base member. The upper inner link and the upper outer link that are pivotally supported, and the lower inner link and the upper end that are pivotally supported by the lower end of the upper inner link are supported by the upper ends of the upper inner link and the upper outer link. A lower outer link pivotally supported at the lower end portion of the outer link, and a cam follower is attached to a coupling portion of the upper inner link and the lower inner link located on the center side of the base member, The opening / closing means raises and lowers an operation shaft having a cam surface having a different outer diameter with which the cam follower contacts an outer peripheral surface relative to the base member, and the upper inner link to which the cam follower is attached and By moving the position of the coupling portion of the lower inner link in the opening / closing direction of the opening / closing rod, the parallel link mechanism is deformed to open / close the opening / closing rod. The plurality of opening / closing rods are attached to the lower outer link of the parallel link mechanism so as to be parallel to each other in the open state, and the opening amount adjusting means is the parallel in the open state. The present invention provides a film opening shaping unit characterized in that a maximum opening amount of the opening / closing rod is adjusted by deforming a link mechanism.

  The invention according to claim 2 is the film opening shaping unit of the invention according to claim 1, wherein the opening amount adjusting means can steplessly deform the parallel link mechanism when the opening / closing rod is in the open state. It is characterized by that.

  According to a third aspect of the present invention, in the film opening shaping unit according to the first or second aspect of the invention, the opening amount adjusting means can deform the parallel link mechanism only when the open / close bar is in an open state. It is characterized by that.

  In order to solve the above-mentioned problem, the invention according to claim 4 is directed to film opening shaping provided with a mandrel for shaping the tubular film into a predetermined opening shape when the tubular film is fitted on the fitting body. The mandrel includes a base member, a plurality of opening / closing rods inserted into the tubular film, and an opening / closing mechanism portion attached to the base member that supports the plurality of opening / closing rods so as to be opened and closed. A biasing means for biasing the plurality of opening / closing rods in the closing direction; and an opening / closing means for opening / closing the opening / closing rod supported by the opening / closing mechanism portion, wherein the opening / closing mechanism portion is formed from a center of the base member. Each of the parallel link mechanisms has a plurality of parallel link mechanisms arranged radially, and each of the parallel link mechanisms has an upper inner link and an upper outer link whose upper ends are pivotally supported by the base member, and lower ends are mutually connected. A lower inner link pivotally supported by the lower end of the upper inner link and a lower outer link pivotally supported by the lower end of the upper outer link. A connecting portion of the upper inner link and the lower inner link located on the center side of the base member is positioned in the opening / closing direction of the opening / closing rod, and the plurality of opening / closing rods are parallel to each other. The opening / closing means is attached to the lower outer link of the parallel link mechanism, and the opening / closing means deforms the parallel link mechanism in a state where the coupling portion of the upper inner link and the lower inner link is positioned, The present invention provides a film opening shaping unit characterized in that an opening / closing rod is opened and closed.

  As described above, in the film opening shaping unit according to the first aspect of the present invention, the plurality of opening / closing rods are attached to the lower outer link of the parallel link mechanism so as to be parallel to each other in the open state. In the state where the heel is opened, the joint part of the upper inner link and the upper outer link and the joint part of the upper inner link and the lower inner link constituting the parallel link mechanism are respectively positioned. When the opening amount adjusting means deforms the parallel link mechanism, the lower outer link moves in parallel. Along with this, the opening / closing rod attached to the lower outer link also translates, so that the opening amount can be adjusted while maintaining the parallel state of the opening / closing rod in the open state.

  Therefore, in this film opening shaping unit, even if the opening amount of the opening / closing rod of the mandrel is changed according to the circumferential length (folding diameter) of the tubular film, the opening / closing rod is in the first opening state or the first closing state. And the cylindrical film does not easily come off from the opening / closing trough or, on the contrary, does not easily fall off, so that the subsequent steps can be carried out smoothly and reliably.

  In the invention according to claim 2, since the opening amount adjusting means can steplessly deform the parallel link mechanism when the opening / closing rod is in the open state, the opening amount of the opening / closing rod of the mandrel Can be changed in a stepless manner, and can be applied to a tubular film having any circumference (folded diameter) with a high accuracy within a certain range.

  In the invention according to claim 3, the opening amount adjusting means can deform the parallel link mechanism only when the opening / closing rod is in the open state. Regardless of the amount of opening of the reed, the same state (the state in which the open / close reed is most closed) has the advantage that the open / close reed can be easily inserted into a preliminarily opened tubular film.

  In the film opening shaping unit of the invention according to claim 1, the opening / closing means moves in parallel by moving the position of the coupling portion between the upper inner link and the lower inner link to which the cam follower is attached in the opening / closing direction of the opening / closing rod. While the link mechanism is deformed, the opening / closing rod is opened and closed, and the opening amount adjusting means is adapted to adjust the maximum opening amount of the opening / closing rod by deforming the parallel link mechanism in the open state. In the film opening shaping unit of the invention according to Item 4, the opening / closing means opens and closes the opening / closing rod by deforming the parallel link mechanism in a state where the coupling portion of the upper inner link and the lower inner link is positioned. Therefore, the open / close rod is held in a parallel state over the entire stroke from the closed state to the open state, and the open / close rod of the open / close rod is By adjusting the over-click, it is possible to adjust the maximum opening amount of the open 閉杆. Therefore, unlike the invention according to the first aspect, it is not necessary to separately provide the opening amount adjusting means in addition to the opening and closing means, and the effect that both can be used is obtained.

It is a schematic block diagram which shows the label covering system provided with the label covering apparatus by which the opening shaping unit which is one Embodiment of the film opening shaping unit which concerns on this invention was mounted. It is a schematic block diagram which shows a label covering apparatus same as the above. It is a longitudinal cross-sectional view which shows the supporting member and mandrel which comprise the opening shaping unit same as the above. It is a longitudinal cross-sectional view which shows the state which removed the mandrel from the supporting member same as the above. FIG. 5 is a cross-sectional view taken along line XX in FIG. 4. It is a cross-sectional view along the YY line in FIG. (A), (b) is a longitudinal cross-sectional view which shows the state which changed the maximum opening amount of the opening / closing rod of the mandrel same as the above. It is a longitudinal cross-sectional view which shows the state which each closed the open / close bar from the state shown to Fig.7 (a), (b). (A) is a longitudinal sectional view showing the open / close state of the opening / closing rod in the opening shaping unit according to another embodiment, and (b) is the opening / closing rod when the maximum opening amount of the opening / closing rod in the opening shaping unit is changed. It is a longitudinal cross-sectional view which shows an open / close state. It is a longitudinal cross-sectional view which shows the open / close state of the open / close bar in the opening shaping unit which is other embodiment. (A), (c), (e) is sectional drawing which shows the state which changed the attachment height of the mandrel in the conventional label opening shaping unit, (b), (d), (f) is (a), (f). It is a figure which shows the state of the front-end | tip part of the opening / closing hook in c) and (e).

  Hereinafter, embodiments will be described with reference to the drawings. In FIG. 1, a cylindrical shrink label (hereinafter referred to as a label) L formed of a heat-shrinkable film made of polyester resin, polystyrene resin or the like is fitted on a PET bottle (hereinafter referred to as bottle) B. A label fitting system 1 is shown. The label fitting system 1 includes a bottle feeding device 2 including a belt conveyor 7, a star wheel 2a, a screw conveyor 2b, and a star wheel 2c, and a base material feeding unit 3a. A label supply device 3 for sequentially forming the label L while sequentially cutting the long label-forming substrate M fed from the material roll, and supplying the label L to the first label delivery position α, and the label supply device 3 to receive the label L supplied to the first label delivery position α and transport it to the second label delivery position β. 4 and the bottle B supplied from the bottle supply device 2 at the bottle supply position γ, is conveyed to the bottle delivery position δ, and the label L conveyed by the label delivery device 4 is transferred to the second label delivery position. A rotary type label fitting device 5 for fitting the label L to the bottle B while the bottle B is received from β and transported from the bottle supply position γ to the bottle delivery position δ, and the label L by the label fitting device 5 It is comprised from the bottle conveyance apparatus 6 which consists of the star wheel 6a and the belt conveyor 7 which carry out the bottle B by which this was fitted.

  The label-forming base material M is formed by continuously connecting cylindrical labels L attached to the bottle B, and is wound around a drum in a state of being folded into a sheet shape in the base material feeding portion 3a. ing. Further, the sheet-like label forming base material M fed from the base material feeding portion 3a is folded by being folded in the middle of supply so that the label L can be easily opened again when the label L is attached to the bottle B. The position is changed (see FIG. 1).

  As shown in FIGS. 1 and 2, the label delivery device 4 has a plurality of take-up members that rotate at a constant rotational speed so as to pass through a first label delivery position α and a second label delivery position β. 4a, and the label L supplied to the first label delivery position α in a folded state in the form of a sheet is received by the take-up member 4a being sucked and held up to the second label delivery position β. It is designed to be transported.

  As shown in FIGS. 1 and 2, the label fitting device 5 is arranged on a concentric circle around the rotation axis via a plurality of support disks 11, 12, 13 attached to the rotation axis (not shown). A plurality of label fitting heads 10 attached at regular intervals to each other, and a cylindrical label L folded into a sheet shape received at the second label delivery position β by each label fitting head 10 is a bottle. The label L is expanded larger than the outer diameter of B, and the expanded label L is fitted on the body of the bottle B while the bottle B received at the bottle supply position γ is being transported to the bottle delivery position δ. It is like that.

  The label fitting head 10 is folded into a bottle holding means 20 for holding the bottle B received at the bottle supply position γ in a state of being placed on the bottle holding table 21 and a sheet received at the second label delivery position β. The label opener 30 that opens in a cylindrical shape and the cylindrical label L that is opened by the label opener 30 are shaped into a predetermined opening shape that can easily fit into the body of the bottle B. The unit 40 and a label fitting unit 60 for fitting the label L shaped into a predetermined opening shape by the opening shaping means 40 to the bottle B placed on the bottle holding table 21 are provided. After the label L in a folded state in a sheet shape received at the label delivery position β is opened in a cylindrical shape by the label opener 30, the opening is shaped. The knit 40 is shaped into a predetermined opening shape, and the bottle B received at the bottle supply position γ is shaped into the predetermined opening shape while being transported to the bottle delivery position δ while being held by the bottle holding base 21. The label L is fitted on the body of the bottle B by the label fitting unit 60.

  As shown in FIG. 2, the label opener 30 is folded into a sheet shape by suction from a pair of openable and swayable swing arms 31 having a gripping part attached to the tip and a suction port formed on the gripping surface. A take-up member of the label delivery device 4, which is composed of a suction means (not shown) for sucking and holding both surfaces of the label L in the gripped state by the gripping part and an opening / closing drive means 32 for opening and closing the pair of swing arms 31. After receiving the label L folded in the form of a sheet conveyed in a state where one side is sucked and held at 4a by the gripping portions of the pair of swing arms 31 at the second label delivery position β. In a state where both surfaces of the label L are sucked and held by the gripping portions, the swinging arm 31 is opened and the both surfaces of the label L are separated from each other, thereby making the label L into a cylindrical shape. It is adapted to mouth.

  As shown in FIGS. 2 to 4, the opening shaping unit 40 includes a cylindrical support member 41 supported by the support arm 13 so as to be movable up and down, a mandrel 43 attached to a lower end portion of the support member 41, and The cam mechanism 50 is configured to raise and lower the support member 41. When the support member 41 is lowered, the mandrel 43 is inserted into the label L opened by the label opener 30.

  The support member 41 has an attachment portion 42 for attaching a mandrel 43 that projects outward in the radial direction at the lower end portion thereof. The attachment portion 42 is formed with a male screw portion 42a on a lower outer peripheral surface thereof. ing.

  As shown in FIG. 2, the cam mechanism 50 that raises and lowers the support member 41 includes a cam groove 51 formed in the cylindrical body 14 surrounding the upper part of the label fitting head 10, and a support member that fits into the cam groove 51. 41, and the roller 52 is moved while moving up and down along the cam groove 51 by rotating the label fitting head 10 around the rotation axis. Along with this, the support member 41 on which the roller 52 is supported moves up and down.

  As shown in FIGS. 3 to 6, the mandrel 43 includes an annular base member 44 attached to the lower end portion of the support member 41, and four opening / closing rods 45 inserted into the label L opened by the label opener 30. An open / close mechanism 46 attached to the base member 44 that supports the four open / close rods 45 so that the open / close rod 45 can be opened and closed, and a bias that biases the open / close rod 45 supported by the open / close mechanism 46 in the closing direction. Means 47, opening / closing means 48 for opening and closing the four opening / closing rods 45 supported by the opening / closing mechanism 46, and opening amount adjusting means 49 for adjusting the maximum opening amount of the opening / closing rod 45 by the opening / closing means 48. The mandrel 43 is attached to the support member 41 by screwing the female screw portion 44 a formed on the upper inner peripheral surface of the base member 44 into the male screw portion 42 a formed on the attachment portion 42 of the support member 41. It is.

  As shown in FIGS. 4 to 5, the opening / closing mechanism 46 is configured by four parallel link mechanisms arranged radially in the radial direction of the base member 44 at an angle of 90 degrees. The upper inner link 46a and the upper outer link 46b supported by the base member 44 in a state where the upper ends are mutually pin-coupled, and the lower end are mutually pin-coupled, and the upper end is the upper portion The lower inner link 46c is pin-coupled to the lower end of the inner link, and the lower outer link 46d is pin-coupled to the lower end of the upper outer link, and is located on the center side of the base member 44. A cam follower 46e is attached to the joint between the upper inner link 46a and the lower inner link 46c.

  The upper outer link 46b constituting each parallel link mechanism is provided with a lever 46f extending from the upper end portion thereof to the inside of the base member 44 and having a bifurcated tip portion, and this lever 46f. The inner ring of the bearing 46g is pivotally supported by the bifurcated portion with the bearing 46g sandwiched between the bifurcated portions.

  Further, the upper inner link 46a constituting each parallel link mechanism is provided with a lever 46h extending from the upper end portion to the outside of the base member 44, and the upper inner link 46a is depressed by pushing down the lever 46h. And the cam follower 46e attached to the coupling | bond part of the lower inner link 46c moves to the center side of the base member 44. As shown in FIG.

  In addition, the lower outer link 46d constituting each parallel link mechanism is provided with an attachment portion 46i extending downward from the lower end portion thereof, and the upper end portion of the opening / closing rod 45 is attached to the attachment portion 46i. ing.

  As shown in FIG. 4, the urging means 47 urges the lever 46 h connected to the upper end portion of each upper inner link 46 a in a direction to push down, and corresponds to each lever 46 h on the lower surface of the base member 44. Four coil springs 47a respectively housed in four holes formed in the upper and lower holes 46b, and adjacent upper outer links 46b so as to bias each upper outer link 46b toward the center side of the base member 44 as shown in FIG. The cam follower 46e attached to the joint portion of the upper inner link 46a and the lower inner link 46c by the urging force of these coil springs 47a and 47b is formed on the base member 44. The parallel link mechanism is biased in the closing direction and finally the opening / closing rod 45 is biased in the closing direction. It has become way.

  The opening / closing means 48 penetrates the center portion of the base member 44 while being inserted into the cylindrical support member 41 so as to be able to move up and down. As shown in FIGS. 7A and 7B, an operation shaft 48a having different cam surfaces and a drive cylinder 48b attached to the upper end of the support member 41 for raising and lowering the operation shaft 48a are provided. When the operation shaft 48a is lowered, the large-diameter portion cb of the operation shaft 48a forming the cam surface presses the cam follower 46e to the outside, so that the opening / closing rod 45 is opened, and FIGS. As shown, when the operating shaft 48a is raised, the cam follower 46e is applied to the small-diameter portion cs of the operating shaft 48a forming the cam surface by the urging force of the coil springs 47a and 47b that normally urge the opening / closing rod 45 in the closing direction. But Each parallel link mechanism together is put in the closed and in the open 閉杆 45 is closed so.

  As shown in FIGS. 7A and 7B, the four opening / closing rods 45 are in an open state, that is, in a state in which the cam follower 46e is in contact with the large diameter portion of the operation shaft 48a. Even if the parallel link mechanism is deformed while the cam follower 46e is in contact with the large diameter portion of the operation shaft 48a, the extension angle of the attachment portion 46i with respect to the lower outer link 46d is set. The parallel state of the open / close bar 45 of the book is maintained.

  As shown in FIGS. 7 (a) and 7 (b), the opening amount adjusting means 49 is provided on each upper outer link by a flange portion 49a projecting outward in the radial direction that is connected to the upper side of the cam surface of the operation shaft 48a. The maximum opening amount of the opening / closing rod 45 is adjusted by pressing the bearing 46g attached to the tip of the lever 46f of the 46b downward to deform the parallel link mechanism in the open state, and the mandrel 43 By changing the screwing amount of the base member 44 that constitutes the mounting portion 42 and changing the mounting height of the mandrel 43 with respect to the support member 41, the operating shaft 48a is lowered to form a cam surface. When the large-diameter portion cb of the operation shaft 48a presses the cam follower 46e outward, that is, when the opening / closing rod 45 is opened, the amount of depression of the bearing 46g by the flange portion 49a is adjusted. By, so as to adjust the amount of deformation of the parallel link mechanism. FIG. 7B shows a state where the mounting height of the mandrel 43 with respect to the support member 41 is lowered by ΔH with respect to the state shown in FIG. 7A, and the mounting of the mandrel 43 with respect to the support member 41. When the height is increased, the maximum opening amount of the opening / closing rod 45 is increased, and when the mounting height of the mandrel 43 with respect to the support member 41 is decreased, the maximum opening amount of the opening / closing rod 45 is decreased.

  Further, as shown in FIGS. 8A and 8B, the cam follower is closed to the small diameter portion cs of the operation shaft 48a forming the cam surface when the opening / closing rod 45 is closed, that is, the operation shaft 48a is lifted. In the state in which 46e is in contact, the cam follower 46e of the parallel link mechanism moves inward in the radial direction of the base member 44, so that the four open / close rods 45 cannot maintain the parallel state and are in the first closed state. Since the flange 49a is separated from the bearing 46g, the parallel link mechanism has the same shape even when the maximum opening amount of the opening / closing rod 45 is different, and the opening / closing rod 45 is in the most closed state.

  As shown in FIG. 2, the label fitting means 60 includes a support bar 61 supported by the support disk 13 so as to be movable up and down, a carrier plate 62 removably attached to the lower end of the support bar 61, and a support. It comprises a cam mechanism 63 for raising and lowering the rod 61, and the carrier plate 62 is formed with holes for inserting the entire four opening / closing rods 45.

  The cam mechanism 63 includes a second cam groove 64 formed in the cylindrical body 14 surrounding the label fitting head 10, and a roller 65 that is fitted in the cam groove 64 and supported by an intermediate portion of the support bar 61. The roller 65 moves while moving up and down along the second cam groove 64 when the label fitting head 10 rotates around the rotation axis, and the roller 65 is supported accordingly. The supporting rod 61 is moved up and down.

  Accordingly, when the carrier plate 62 descends along the opening / closing rod 45 after the label L is shaped into a predetermined opening shape that is easy to fit on the body of the bottle B by the opening / closing rod 45 of the opening shaping unit 40, the carrier plate The label L is pushed downward by 62, and the label L is fitted on the body of the bottle B located immediately below.

  2, the roller 52 and the roller 65 are supported by the support member 41 and the support bar 61 via the mounting member 53 and the mounting member 66, respectively. The mounting member 66 is slidably supported by the support member 41, and the long support member 41 and the support bar 61 support each other, thereby improving the support stability of both.

  As described above, in the label fitting device 5 employed in the label fitting system 1, the mounting height of the mandrel 43 is changed according to the peripheral length (folding diameter) of the label L, and By adjusting the maximum opening amount, the label L can be shaped into an appropriate opening shape without replacing the mandrel 43 itself. Even if the perimeter (folding diameter) of the label is changed, and the perimeter (folding diameter) of the label L is within a certain range, the mandrel 43 itself is replaced. When the perimeter (folding diameter) of the label changes, the time, labor, and cost required for the setup change can be reduced compared to the conventional label fitting device that had to replace the mandrel. be able toThis is particularly effective when a rotary type label fitting apparatus 5 having a large number of label fitting heads 10 each having a mandrel 43 attached thereto is employed as in the label fitting system 1.

  In particular, the opening shaping unit 40 mounted on the label fitting device 5 can adjust the opening amount of the label L while maintaining the parallel state of the opening / closing rod 45 in the open state. Even if the opening amount of the opening / closing rod 45 of the mandrel 43 is changed according to the folding diameter), the opening / closing rod 45 does not enter the first opening state or the first closing state, and the label L is not easily removed from the opening / closing rod 45. Since, on the contrary, it does not become easy to drop off, it is possible to smoothly and reliably perform the subsequent operation of fitting the label L to the bottle B.

  Further, the opening shaping unit 40 is configured so that the opening amount adjusting means 49 changes the screwing amount of the base member 44 constituting the mandrel 43 with respect to the mounting portion 42 so that the opening / closing rod 45 is in the open state. Can be changed in a stepless manner, so that the opening amount of the opening / closing rod 45 of the mandrel 43 can be changed in a stepless manner. It is possible to deal with the (diameter) label L with high accuracy.

  Further, since the opening amount adjusting means 49 can deform the parallel link mechanism only when the opening / closing rod 45 is in the open state, the maximum opening amount of the opening / closing rod 45 is different. However, when the opening / closing rod 45 is closed, the opening / closing rod 45 is in the most closed state regardless of the maximum opening amount of the opening / closing rod 45, and the opening / closing rod 45 is inserted into the label L that is preliminarily opened by the label opener 30. There is an advantage that it is easy.

  In the above-described embodiment, by changing the mounting height of the mandrel 43 relative to the support member 41 by changing the screwing amount of the base member 44 constituting the mandrel 43 relative to the mounting portion 42, Although the opening amount is adjusted, the present invention is not limited to this. For example, when the operation shaft 48a for opening / closing the opening / closing rod 45 is not lifted / lowered by the drive cylinder 48b, the operation shaft 48a is lifted / lowered by a cam mechanism 50 similar to the cam mechanism 50 for lifting / lowering the support member 41, that is, FIG. As shown to (a), (b), it is supported by the cam groove 48c formed in the cylindrical body 15 surrounding the upper part of the label fitting head 10, and the upper end part of the operating shaft 48a fitted in this cam groove 48c. When the operation shaft 48a is moved up and down by a cam mechanism composed of the rollers 48d, the cylindrical body 15 in which the cam grooves 48c are formed is moved up and down as shown in FIGS. Thus, the maximum opening amount of the opening / closing rod 45 may be adjusted. In this way, the opening shaping unit 40 mounted on a large number of label fitting heads 10 The advantage that the maximum opening amount of the opening and closing rod 45 can be adjusted at the same time there also allows automatic type replacement of.

  Further, as another aspect, by attaching the flange portion 49a to the operation shaft 48a so that the position of the flange portion 49a can be changed in the height direction, and changing the attachment position of the flange portion 49a with respect to the operation shaft 48a, The amount may be adjusted.

  Further, in the above-described embodiment, the opening amount of the opening / closing rod 45 of the mandrel 43 can be adjusted steplessly by changing the screwing amount of the base member 44 constituting the mandrel 43 with respect to the mounting portion 42. However, the present invention is not limited to this, and the opening amount of the opening / closing rod 45 may be adjusted in stages by changing the mounting height of the mandrel 43 relative to the support member 41 in stages. Good.

  Further, in each of the above-described embodiments, the opening and closing means 45 is opened and closed by the opening and closing means 48 and the maximum opening amount of the opening and closing collar 45 when opened by the opening amount adjusting means 49 is adjusted. The opening amount adjusting means 49 can also be used as an opening / closing means. For example, like the opening / closing means 48A shown in FIGS. 10 (a) and 10 (b), the large-diameter portion provided at the lower end portion of the operation shaft 48a of the opening / closing means 48 and forming a cam surface with which the cam follower 46e abuts. In place of cb and the small diameter portion cs, a cam follower 46e of the opening / closing mechanism 46 is brought into contact with each other to provide a positioning portion pd having the same diameter for always positioning the cam follower 46e in the radial direction of the base member 44. When the cam follower 46e is in contact with the four open / close rods 45e, the extension angle of the mounting portion 46i with respect to the lower outer link 46d is set so that the four open / close rods 45 are parallel to each other, and the operation shaft 48a is moved up and down. The opening / closing rod 45 is opened and closed by changing the amount of depression of the bearing 46g by the portion 49a, and the opening / closing stroke is adjusted. It may be adjusted to the maximum opening amount of the opening and closing rod 45 I.

  When such a configuration is adopted, the opening / closing rod 45 is held in a parallel state over the entire stroke from the closed state to the opened state of the opening / closing rod 45, and it is necessary to separately provide an opening amount adjusting means in addition to the opening / closing means 48A. The effect that both can be used is obtained.

  In this embodiment, the cam follower 46e of the opening / closing mechanism 46 is brought into contact with the positioning portion pd provided at the lower end of the operation shaft 48a, thereby positioning the cam follower 46e in the radial direction of the base member 44. However, the present invention is not limited to this, and positioning can also be performed by connecting the connecting portions of the upper inner link 46a and the lower inner link 46c in each parallel link mechanism by a ring-shaped connecting member.

  Moreover, in each embodiment mentioned above, although the four opening / closing hooks 45 are provided in the mandrel 43, it is not limited to this, It is also possible to provide four or more opening / closing hooks, in that case It is desirable that the parallel link mechanisms arranged radially in the radial direction of the base member 44 be evenly arranged in the circumferential direction of the base member 44.

  In the present invention, before a tubular film such as a shrink label is fitted on a fitting body such as a bottle, it is shaped into an opening shape that matches the shape of the fitting body.

DESCRIPTION OF SYMBOLS 1 Label fitting system 5 Label fitting apparatus 10 Label fitting head 14, 15 Cylindrical body 20 Bottle holding means 30 Label opener 40 Opening shaping unit (film opening shaping unit)
41 support member 42 mounting portion 42a male screw portion 43 mandrel 44 base member 44a female screw portion 45 opening / closing rod 46 opening / closing drive mechanism 46a upper inner link 46b upper outer link 46c lower inner link 46d lower outer link 46e cam follower 46f lever 46g bearing 46h lever 46 Portion 47 Biasing means 47a, 47b Coil springs 48, 48A Opening / closing means 48a Operating shaft 48b Drive cylinder 48c Cam groove 48d Roller 49 Opening adjustment means 49a Gutter cb Large diameter part cs Small diameter part pd Positioning part 50 Cam mechanism 51 Cam groove 52 Roller 53 Mounting member 60 Label fitting means L Shrink label (tubular film)
B PET bottle (fit body)

Claims (4)

A film opening shaping unit comprising a mandrel for shaping the tubular film into a predetermined opening shape when fitting the tubular film on the fitting body,
The mandrel is
A base member;
A plurality of opening and closing hooks inserted into the tubular film;
An opening / closing mechanism portion attached to the base member for supporting the plurality of opening / closing rods so as to be opened and closed;
Biasing means for biasing the plurality of opening / closing rods in the closing direction;
An opening / closing means for opening / closing the opening / closing rod supported by the opening / closing mechanism;
Opening amount adjusting means for adjusting the maximum opening amount of the opening and closing rod by the opening and closing means,
The opening / closing mechanism is
A plurality of parallel link mechanisms arranged radially from the center of the base member;
Each of the parallel link mechanisms has an upper inner link and an upper outer link whose upper ends are pivotally supported by the base member, and a lower end which is pivotally supported by the base member. A lower inner link pivotally supported by the lower end of the link and a lower outer link pivotally supported by the lower end of the upper outer link;
A cam follower is attached to a coupling portion between the upper inner link and the lower inner link located on the center side of the base member,
The opening / closing means raises and lowers an operation shaft having a cam surface having a different outer diameter with which the cam follower contacts an outer peripheral surface relative to the base member, and the upper inner link to which the cam follower is attached and By moving the position of the coupling portion of the lower inner link in the opening / closing direction of the opening / closing rod, the parallel link mechanism is deformed to open / close the opening / closing rod,
The plurality of opening / closing rods are attached to the lower outer link of the parallel link mechanism so as to be parallel to each other in the open state,
The film opening shaping unit is characterized in that the opening amount adjusting means adjusts the maximum opening amount of the opening / closing rod by deforming the parallel link mechanism in the open state.   The film opening shaping unit according to claim 1, wherein the opening amount adjusting means can steplessly deform the parallel link mechanism when the opening / closing rod is in an open state.   The film opening shaping unit according to claim 1 or 2, wherein the opening amount adjusting means can deform the parallel link mechanism only when the opening / closing bar is in an open state. A film opening shaping unit comprising a mandrel for shaping the tubular film into a predetermined opening shape when fitting the tubular film on the fitting body,
The mandrel is
A base member;
A plurality of opening and closing hooks inserted into the tubular film;
An opening / closing mechanism portion attached to the base member for supporting the plurality of opening / closing rods so as to be opened and closed;
Biasing means for biasing the plurality of opening / closing rods in the closing direction;
Opening and closing means for opening and closing the opening and closing rod supported by the opening and closing mechanism portion,
The opening / closing mechanism is
A plurality of parallel link mechanisms arranged radially from the center of the base member;
Each of the parallel link mechanisms has an upper inner link and an upper outer link whose upper ends are pivotally supported by the base member, and a lower end which is pivotally supported by the base member. A lower inner link pivotally supported by the lower end of the link and a lower outer link pivotally supported by the lower end of the upper outer link;
A connecting portion of the upper inner link and the lower inner link located on the center side of the base member is positioned in the opening / closing direction of the opening / closing rod, and the plurality of opening / closing rods are parallel to each other. Attached to the lower outer link of the parallel link mechanism;
The film characterized in that the opening / closing means opens and closes the opening / closing rod by deforming the parallel link mechanism in a state where the coupling portion of the upper inner link and the lower inner link is positioned. Aperture shaping unit.

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