JP6878446B2 - Cylindrical film opening device - Google Patents

Description

The present invention relates to a tubular film opening device that opens a tubular film formed to a predetermined length in a tubular shape while transporting the tubular film to fit the mandrel.

Conventionally, a tubular film folded flat is cut to a predetermined length, the cut film is conveyed to a pair of mandrels, and when the mandrels approach each other, the film is fitted to the mandrels to obtain the mandrel. A tubular film mounting device is known that mounts a film on a container by expanding the film by separating the film and then moving the mandrel and the container relative to each other (see, for example, Patent Document 1).

In this mounting device, the tubular film cut to a predetermined length by the cutting device is received by the belt transport device including a pair of endless transport belts. The pair of transport belts are formed with a plurality of suction openings at intervals in the longitudinal direction. When the pair of transport belts transport while sandwiching the tubular film, the suction force of the pair of first vacuum suction chambers arranged in parallel with each other acts on each transport belt. Therefore, the tubular film is conveyed in a state of being sandwiched and sucked and held by a pair of conveying belts.

After that, the pair of transport belts move in a substantially V shape so as to be separated from each other. In this substantially V-shaped region, suction forces from the pair of second vacuum suction chambers act on each transport belt. Therefore, when the pair of transport belts move so as to spread in a substantially V shape, the tubular film is sucked and held by each transport belt, so that the tubular film is transported downward while being opened in a tubular shape. Then, the film opened in a tubular shape is fitted to the mandrel that has moved to the lower end of the belt conveyor.

Japanese Patent No. 3776150

In the belt transfer device in the tubular film mounting device described above, when the pair of transfer belts move at the boundary between the first vacuum suction chamber and the second vacuum suction chamber, the area where the suction force for the pair of transfer belts is interrupted. Exists. Therefore, since the tubular film is not sucked and held by the pair of transport belts in this region, the tubular film is sucked only by the transport belt on one side when the pair of transport belts start to spread in a substantially V shape. Sometimes I couldn't open it. In this case, the tubular film cannot be fitted to the mandrel, which hinders the film attachment to the container.

An object of the present invention is to provide a tubular film opening device capable of more reliably opening a tubular film while conveying it and fitting it into a mandrel.

The tubular film opening device according to the present invention is a tubular film opening device that opens while transporting a tubular film formed to a predetermined length in order to fit it on a mandrel, and has a first suction chamber inside. A pair of first suction chamber forming members and each lower end of the pair of first suction chamber forming members, which are formed and have first openings communicating with the first suction chamber on the side surfaces facing each other. A pair of second units, which are connected to each other and arranged so that the distance between them increases downward, a second suction chamber is formed inside, and a second opening communicating with the second suction chamber is formed. The suction chamber forming member and the first opening and the second opening are arranged so as to circulate in a closed state, and a plurality of suction holes are formed at predetermined intervals in the longitudinal direction, each of which has an endless shape. The tubular film is conveyed downward while being sandwiched by the pair of transport belts that move at a position corresponding to the first opening, and is conveyed to the second opening. The first suction chamber and the second suction chamber are sucked and held by the pair of transport belts that move in the corresponding positions and transported downward so as to be opened in a tubular shape and fitted to the mandrel. The first suction chamber forming member and the second suction chamber forming member are communicated with each other at the connecting portion, and a pair of transfer belts move at the boundary portion between the first suction chamber forming member and the second suction chamber forming member. Occasionally, the suction force is applied to the pair of transport belts without interruption .

According to this configuration, since the first suction chamber and the second suction chamber are communicated with each other, the pair of transfer belts are also moved when the pair of transfer belts move at the boundary between the first and second suction chambers. It is possible to act on the suction force without interruption. Therefore, the tubular film is conveyed downward while being opened in a tubular shape with the film portions facing each other being reliably sucked and held by the respective conveying belts. Therefore, the tubular film can be more reliably fitted to the mandrel.

In the tubular film opening device according to the present invention, it is preferable that the second suction chamber forming member is connected so as to be able to adjust the inclination angle with respect to the first suction chamber forming member.
According to this configuration, for example, when the width dimension of the tubular film is changed, the tubular film is opened in an appropriate opening state by adjusting the inclination angle (spread angle) of the second suction chamber forming member. Can be formed into.

Further, in the tubular film opening device according to the present invention, the suction hole has an opening area larger than that of another position at a position corresponding to the lower end portion of the tubular film sandwiched between the pair of transport belts. It may be formed to be large. According to this configuration, the lower end portion where the tubular film starts to open is reliably sucked and held by each transport belt, so that the tubular film can be opened more reliably.

In this case, a plurality of the suction holes are formed in each of the transport belts at positions corresponding to the lower ends of the tubular films that are sandwiched and transported between the pair of transport belts. It is preferable that the plurality of suction holes formed at positions corresponding to the lower end portions are formed at positions where one and the other of the pair of transport belts do not overlap each other. According to this configuration, even when the opposing film portions constituting the folded tubular film are in a pseudo-adhesive state due to, for example, electrostatic force, different portions of each film portion are attracted to open the film more reliably. Can be done.

Further, in the tubular film opening device according to the present invention, the pair of transport belts may be supported while being in sliding contact with the first suction chamber forming member and the resin member provided on the second suction chamber forming member. .. According to this configuration, noise and manufacturing cost at the time of operating the apparatus can be significantly reduced as compared with the case where the pair of transport belts are supported by a large number of rollers rotatably provided on each suction chamber forming member.

According to the tubular film opening device according to the present invention, by allowing the suction force to act on the pair of transport belts without interruption, the tubular film can be more reliably opened and fitted to the mandrel while being transported. ..

It is a side view which shows the label fitting apparatus including the label opening apparatus which is one Embodiment. (A) is a front view of the inner guide seen from the direction of arrow A in FIG. 1, and (b) is a side view of a support mechanism for supporting the inner guide. It is a figure which shows the support mechanism of the inner guide device. It is a top view which shows the base material delivery roller. It is (a) plan view and (b) BB line sectional view which shows the cutting apparatus. It is a figure for demonstrating the formation state of the cutting edge of the rotary blade and the fixed blade which constitute a cutting apparatus. It is (a) front view, (b) left side view, (c) right side view, and (d) perspective view which shows the blade part of the rotary blade of a cutting apparatus. It is (a) front view, (b) left side view, (c) right side view, and (d) perspective view which shows the blade part of the fixed blade of a cutting apparatus. It is a side view which shows the label opening device of this embodiment. (A) is a sectional view taken along line XX in FIG. 9, (b) is a sectional view taken along line YY in FIG. 9, and (c) is a sectional view taken along line ZZ in FIG. (A) and (b) are front views showing a pair of transport belts constituting the label opening device. It is a figure which shows the elevating mechanism of a mandrel and the container mounting stand. It is a top view which includes a partial cross section which shows a mandrel. The open / closed state of the mandrel is shown, (a) is a side view of the mandrel in the closed state, and (b) is a side view of the mandrel in the open state. (A) is a front view of the mandrel cam, and (b) is a plan view showing a state in which the label is fitted on the mandrel. (A) to (d) are diagrams which sequentially show the steps of fitting the label into the container. It is a perspective view which shows the stopper part of the container mounting stand.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. In this description, specific shapes, materials, numerical values, directions, etc. are examples for facilitating the understanding of the present invention, and can be appropriately changed according to applications, purposes, specifications, and the like. Further, when a plurality of embodiments and modifications are included in the following, it is assumed from the beginning that these configurations are appropriately combined and used.

FIG. 1 is a side view showing a label fitting device 1 including a label opening device (cylindrical film opening device) 10 according to an embodiment. The label fitting device 1 is a device that opens the label L, which is a tubular film, and fits the label L into the container C. The label fitting device 1 includes an inner guide device 12, a base material delivery roller 14, a cutting device 16, a label opening device 10, a mandrel 18, and a container mounting table 19 in this order from the upper side in the vertical direction.

A guide roller 2 is rotatably arranged above the label fitting device 1. The label base material LM before cutting is conveyed in a long, sheet-like state in which tubular labels L are continuously connected. In the present embodiment, the label base material LM that has been unwound from the reel of the base material feeding device (not shown) and conveyed in the substantially horizontal direction is wound around the outer periphery of the guide roller 2 and the transport direction is changed to the substantially vertical direction. Will be done.

FIG. 2A is a front view of the inner guide 20 as viewed from the direction of arrow A in FIG. 1, and FIG. 2B is a side view of the support mechanism 22 that supports the inner guide 20. FIG. 3 is a diagram showing a support mechanism 22 of the inner guide device 12. As shown in FIG. 2, the inner guide device 12 includes an inner guide 20 arranged inside the tubular label base material LM, a support mechanism 22 for supporting the inner guide 20 from the outside of the label base material LM, and a support mechanism 22. The label base material LM is provided with a crease relaxation mechanism 24 for relaxing or removing creases.

The inner guide 20 is connected to the supported portion 26 supported by the support mechanism 22 via a narrow connecting member 28 on the downstream side of the supported portion 26 in the delivery direction (arrow B direction) of the label base material LM. It is provided with a delivery plate 30 provided.

The supported portion 26 of the inner guide 20 is a portion where the inner guide 20 is supported from the outside of the label base material LM by the support mechanism 22. The supported portion 26 has a flat plate-shaped base member 32 and two upper end portions 38a and 38b protruding upward from both sides in the width direction of the base member 32. Then, introduction plates 40a and 40b for introducing the label base material LM into the inner guide 20 are attached to the tips of the upper end portions 38a and 38b. The introduction plates 40a and 40b are arranged close to or in contact with the inside of the folds O1 and O2 located at both ends in the width direction of the label base material LM. As a result, the label base material LM is introduced into the inner guide device 12 in a state where the position in the width direction is substantially determined by the introduction plates 40a and 40b.

The supported portion 26 is preferably formed of, for example, a metal plate. A pair of upstream internal rollers 42a and 42b are rotatably attached to the upper end portions 38a and 38b of the supported portion 26. Further, a pair of downstream internal rollers 44a and 44b are rotatably attached to the lower end of the base member 32 of the supported portion 26. That is, a plurality of pairs of internal rollers are arranged side by side in the transport direction of the label base material LM. A part of the outer peripheral surface of each of the rollers 42a, 42b, 44a, 44b is exposed from the lateral side wall of the base member 32 and the upper end portions 38a, 38b in the width direction. Further, the base member 32 of the supported portion 26 has a pair of side wall surfaces 45 orthogonal to the width direction of the label base material LM, and these side wall surfaces 45 form a pair of inner pressing surfaces. Then, magnets 46 are embedded in the vicinity of the pair of inner pressing surfaces.

The support mechanism 22 of the inner guide device 12 includes a pair of upstream support rollers 23a and 23b and a pair of downstream support rollers 25a and 25b. The upstream support rollers 23a and 23b are rotatably supported at the same height position as each other. Further, the downstream support rollers 25a and 25b are rotatably supported at the same height position as each other.

Each pair of support rollers 23a, 23b, 25a, 25b has a groove portion on the outer peripheral surface, and the supported portion 26 of the inner guide 20 is fitted into the groove portion in the surface direction of the label base material LM. The position of the inner guide 20 in (that is, the direction perpendicular to the paper surface of FIG. 2B) is restricted. Further, the inner guide 20 is supported in the direction of gravity because the bottom surfaces of the grooves of the support rollers 23a and 23b are placed on the exposed outer peripheral surfaces of the upstream inner rollers 42a and 42b with the label base material LM interposed therebetween. The bottom surfaces of the grooves of the support rollers 25a and 25b are also in contact with the exposed outer peripheral surfaces of the downstream internal rollers 44a and 44b with the label base material LM sandwiched between them.

The crease relaxation mechanism 24 of the present embodiment is an inner pressing surface 45 which is a side wall surface on both sides of the base member 32 in the supported portion 26 of the inner guide 20 in the width direction, and outer peripheral surfaces of the outer pressing rollers 48a and 48b. It is composed of an outer pressing surface. The outer pressing rollers 48a and 48b are rotatably attached to the attachment member 50, respectively. One end of each of the two guide shafts 52 is connected to the outer wall surface of the mounting member 50, and these guide shafts 52 are inserted into the two through holes of the guide member 54. A retaining member 56 for preventing the guide shaft 52 from coming off from the guide member 54 is fixed to each other end of each of the two guide shafts 52. As a result, the outer pressing rollers 48a and 48b can move in the direction of approaching and separating from the inner guide 20 (that is, the width direction of the label base material LM) via the mounting member 50, the guide shaft 52, and the guide member 54, respectively. It is supported. Further, as shown in FIG. 2B, the pair of guide members 54 corresponding to the outer pressing rollers 48a and 48b are supported by the pair of slide members 59 which are slidably supported by the two guide shafts 58, respectively. It is attached. With this configuration, the pair of outer pressing rollers 48a and 48b are supported so as to be slidable in the width direction of the label base material LM.

As shown in FIG. 3, the support mechanism 22 has a base plate 60 attached to the frame 3 of the label fitting device 1, and a screw shaft rotatably supported by the base plate 60 and extending in the width direction of the label base material LM. A handle 62 connected to the tip of the screw shaft 61, and two slide blocks 62a and 62b each having a female screw portion screwed to a male screw portion formed on the outer periphery of the screw shaft 61 are further provided. Then, one upstream support roller 23a and one downstream support roller 25a are rotatably supported by the slide block 62a, and the other upstream support roller 23b and the other downstream support roller 25b are rotatably supported by the slide block 62a. It is rotatably supported. Both ends of the screw shaft 61 are rotatably supported by bearings 63a and 63b fixed to the base plate 60, and a substantially central portion thereof is rotatably supported by bearings 63c fixed to the base plate 60. The male screw formed on the outer circumference of the screw shaft 61 is formed as a reverse screw by a portion 61a into which the slide block 62a is screwed and a portion 61b into which the slide block 62b is screwed. As a result, when the handle 62 is rotated to rotate the screw shaft 61, the slide blocks 62a and 62b move in the directions of approaching or separating from each other. As a result, the inner guide 20 can be supported with the inner guide 20 sandwiched between the upstream support rollers 23a and 23b and the downstream support rollers 25a and 25b of each pair via the label base material LM.

Referring to FIG. 2 again, the upper end of the narrow connecting member 28 is connected to the central portion in the width direction of the base member 32, and the lower end thereof is connected to the central portion in the width direction of the delivery plate 30. The delivery plate 30 is formed of, for example, one metal plate. The edges on both sides of the delivery plate 30 in the width direction are located close to the inside of the folds O1 and O2 of the label base material LM conveyed in the arrow B direction. As a result, it is possible to prevent the position of the label base material LM sent out from the inner guide device 12 from being shaken in the width direction.

The crease relaxation mechanism 24 is provided in the inner guide device 12 having the above configuration. In the fold relaxation mechanism 24, the folds O1 and O2 of the label base material LM are magnetically attracted to each other, and the inner pressing surfaces 45, which are the side wall surfaces on both sides in the width direction of the base member 32, and the pair of outer pressing rollers 48a, 48b. The label base material LM is conveyed while being sandwiched between the outer peripheral surface and the outer peripheral surface of the label base material LM. Thereby, the bending habit of the label base material LM can be effectively removed. Therefore, it becomes easy to open the label L cut and formed from the label base material LM in a cylindrical shape thereafter, and the label L can be more reliably fitted around the container C.

Next, the base material delivery roller 14 will be described with reference to FIGS. 1 and 4. FIG. 4 is a top view showing the base material delivery roller 14. As shown in FIGS. 1 and 4, the base material delivery roller 14 includes a drive roller 14a that is rotationally driven by a motor (not shown) and a driven roller 14b that is pressed against the drive roller 14a via the label base material LM. .. The base material delivery roller 14 is installed at a position corresponding to the connecting member 28 of the inner guide 20 described above. As shown in FIG. 4, the drive roller 14a and the driven roller 14b have a pair of large diameter portions 15a and 15b on both sides of the connecting member 28 of the inner guide 20, respectively, and the large diameter portions 15a and the large diameter portions 15a are large. It is intermittently rotationally driven with the label base material LM sandwiched between the diameter portions 15b. As a result, the label base material LM is sent out to the downstream side in the transport direction by a predetermined pitch.

Further, the base material delivery roller 14 is configured so that the edges of the label base material LM on both sides in the width direction are not sandwiched between the large diameter portions 15a and 15b. This makes it possible to prevent the inner guide device 12 from forming creases again on both side edges where the folds O1 and O2 have been relaxed or removed.

Next, the cutting device 16 will be described with reference to FIGS. 5 to 8. 5A and 5B are a plan view showing the cutting device 16 and a sectional view taken along line BB. FIG. 6 is a diagram for explaining a state in which the cutting edges of the rotary blade 16a and the fixed blade 16b constituting the cutting device 16 are formed. 7A and 7B are (a) front view, (b) left side view, (c) right side view, and (d) perspective view showing the blade portion 64 of the rotary blade 16a of the cutting device 16. 8A and 8B are (a) front view, (b) left side view, (c) right side view, and (d) perspective view showing the blade portion 69 of the fixed blade 16b of the cutting device 16.

As shown in FIG. 1, the cutting device 16 is arranged below the base material delivery roller 14 and on the downstream side in the base material transport direction. The cutting device 16 cuts the label base material LM intermittently sent out from the base material delivery roller 14 to a predetermined length to form individual labels L.

As shown in FIGS. 1 and 5, the cutting device 16 includes a rotary cutter including a rotary blade 16a and a fixed blade 16b, and a position adjusting mechanism 63 for adjusting the position of the fixed blade 16b with respect to the rotary blade 16a. .. The rotary blade 16a, the fixed blade 16b, and the position adjusting mechanism 63 are attached to the square tubular frame 65. Further, the rotary blade 16a is rotationally driven by a motor (not shown).

As shown in FIG. 5, the rotary blade 16a has a blade portion 64 having a substantially pentagonal vertical cross section and a base portion having a rectangular vertical cross section with a columnar shaft portion 66a protruding from both end faces to which the blade portion 64 is attached. Includes 66 and. A pair of shaft portions 66a projecting from the base portion 66 are supported by bearings 67 on both side walls 65a and 65b of the frame 65 so as to be rotatable at a fixed position.

As shown in FIGS. 6 and 7 (a) to 7 (d), the blade portion 64 of the rotary blade 16a has a cutting edge 64a formed on a cylindrical surface CS centered on the rotation axis O of the rotary blade 16a. The shear angle is formed by inclining the cutting edge 64a with respect to the rotation axis of the rotary blade 16a on the cylindrical surface CS. Further, the blade portion 64 has an arc surface 64b corresponding to the cylindrical surface CS on the upstream side of the blade edge 64a in the rotation direction, and the blade edge 69a of the fixed blade 16b, which will be described later, comes into sliding contact over the entire length thereof. ing. The shaded display portion in FIGS. 7 (a) and 7 (d) shows the arc surface 64b.

As shown in FIGS. 5A and 5B, the fixed blade 16b is placed on a mounting table 68 projecting forward (on the rotary blade 16a side) from the inner surface of the rear wall 65c of the square tubular frame 65. A blade portion 69, a fixing member 70 positioned on the blade portion 69 in the front-rear direction and the left-right direction of the frame 65, and a plurality of fixing members 70 formed on the fixing member 70. It is provided with a bolt insertion hole and a plurality of fixing bolts 71 each inserted into the plurality of elongated holes 69c formed in the blade portion 69. The blade portion 69 is fixed to the mounting table 68 by screwing and tightening these fixing bolts 71 to the mounting table 68.

As shown in FIGS. 6 and 8 (a) to 8 (d), the blade portion 69 of the fixed blade 16b has a cutting edge parallel to the rotation axis of the rotary blade 16a on a cylindrical surface CS centered on the rotation axis O. 69a is formed, and on the downstream side of the cutting edge 69a in the rotation direction, the cutting edge 64a of the rotating blade 16a corresponding to the cylindrical surface CS has an arcuate surface 69b that can be slidably contacted over the entire length thereof. The shaded display portion in FIGS. 8 (a) and 8 (d) shows the arc surface 69b.

As shown in FIGS. 5A and 5B, the position adjusting mechanism 63 has a mounting table 68 having a sliding surface (upper surface) for sliding the blade portion 69 of the fixed blade 16b so as to be able to approach and separate from the rotary blade 16a. And a pair of extrusion units 72 attached to the rear wall 65c of the frame 65, which pushes the blade portion 69 toward the rotary blade 16a. Each extrusion unit 72 includes a unit body 73 attached so as to penetrate the rear wall 65c of the frame 65, and a stopper bolt 74 attached to the rear wall 65c of the frame 65 so as to project rearward. There is.
The unit main body 73 has an extrusion pin 75 having an operating member attached to the rear end penetrating the rear wall 65c of the frame 65, and a coil spring (not shown) for urging the extrusion pin 75 in the extrusion direction. I have.

The extrusion pin 75 compresses the coil spring arranged around the extrusion pin 75 by a predetermined amount by rotating the operating member attached to the rear end portion while pulling it rearward and locking it to the stopper bolt 74. It can be held in a state. When the locking to the stopper bolt 74 is released by rotating the operating member from this state, the tip of the extrusion pin 75 is the blade of the fixed blade 16b in a state where an impact is applied by the urging force of the compressed coil spring. It comes into contact with the portion 69, and the impact force pushes the blade portion 69 toward the rotary blade 16a. The flange portion protruding from the outer periphery of the extrusion pin 75 abuts around the insertion hole of the extrusion pin 75 formed on the rear wall of the frame 65, so that the protrusion amount of the extrusion pin 75 is regulated. Has been done.

As described above, in the cutting device 16, the cutting edge 64a of the rotary blade 16a and the cutting edge 69a of the fixed blade 16b are formed on the cylindrical surface CS centered on the rotation axis O of the rotary blade 16a. Since the shear angle is formed by inclining the cutting edge 64a of the rotary blade 16a with respect to the rotating shaft O on the cylindrical surface CS, the intersecting position between the cutting edge 64a of the rotary blade 16a and the cutting edge 69a of the fixed blade 16b is determined. While moving from one end to the other end of the cutting edges 64a and 69a as the rotation angle of the rotating blade 16a changes, the distance between the cutting edge 64a and the cutting edge 69a at each intersection position does not change, and the rotation blades 16a rotate. The blade portion 64a of the blade 16a and the blade portion 69 of the fixed blade 16b correspond to the cylindrical surface CS centered on the rotation axis O of the rotary blade 16a, and the cutting edge 64a of the rotary blade 16a can be slidably contacted over the entire length thereof. Since the arcuate surfaces 64b and 69b are provided, the gap between the cutting edges can be adjusted by a simple method as follows.

In order to adjust the gap of the fixed blade 16b with respect to the rotary blade 16a in the cutting device 16 configured as described above, first, by loosening the fixing bolt 71 of the fixed blade 16b, the blade portion 69 is moved back and forth on the mounting table 68. By rotating the rotary blade 16a in the reverse direction with the fixed blade 16b protruding toward the rotary blade 16a to some extent in a state where it can slide in the direction, the back surface side of the blade edge 64a of the rotary blade 16a is changed to the blade edge of the fixed blade 16b. By abutting on the back surface side of 69a, the blade portion 69 of the fixed blade 16b is retracted from the rotary blade 16a so that the blade edge 69a of the fixed blade 16b is located in the vicinity of the blade edge 64a of the rotary blade 16a.

Subsequently, the cutting edge 64a of the rotary blade 16a comes to the position corresponding to the arcuate surface 69b of the fixed blade 16b, or the cutting edge 69a of the fixed blade 16b comes to the position corresponding to the arcuate surface 64b of the rotary blade 16a. When the locking to the stopper bolt 74 is released by rotating the operating member of the extrusion pin 75 of the position adjusting mechanism 63 in the state where the rotating position of the rotary blade 16a is adjusted, the urging force of the compressed coil spring causes The tip of the extrusion pin 75 contacts the blade portion 69 of the fixed blade 16b in a state of applying an impact, that is, the extrusion pin 75 abuts so as to flip the blade portion 69, and the blade portion 69 rotates due to the impact force. The position where the blade edge 64a of the rotary blade 16a is slightly extruded toward the blade 16a and the blade edge 64a of the rotary blade 16a is in contact with the arc surface 69b of the fixed blade 16b, or the position where the blade edge 69a of the fixed blade 16b is in contact with the arc surface 64b of the rotary blade 16a. In that state, if the blade portion 69 of the fixed blade 16b is fixed to the mounting table 68 by tightening the fixing bolt 71, the clearance adjustment between the cutting edges is completed.

As described above, this cutting device 16 is a conventional film in which linear cutting edges are formed on the rotary blade and the fixed blade, respectively, and the fixed blade having the linear cutting edge is tilted and installed to give a shear angle. Unlike the rotary cutter mounted on the cutting device, there is no need to perform troublesome clearance adjustment work such as partially deforming the fixed blade with multiple push bolts and pull bolts, and the cutting edge 64a of the rotary blade 16a is fixed. By adjusting the position of the entire blade portion 69 of the fixed blade 16b only once so as to abut the arc surface 69b of the fixed blade 16b or the cutting edge 69a of the fixed blade 16b against the arc surface 64b of the rotary blade 16a. , The appropriate gap (same gap) can be adjusted over the entire lengths of the cutting edges 64a and 69a of the rotary blade 16a and the fixed blade 16b.

Further, the position adjusting mechanism 63 installed in the cutting device 16 uses a constant urging force of the coil spring to give an impact to the blade portion 69 of the fixed blade 16b (so as to flip the blade portion 69). ), The blade portion 69 is extruded by bringing the extrusion pin 75 into contact with the blade portion 69. Therefore, the push output of the blade portion 69 does not become larger or insufficient than necessary, and an appropriate push output always acts on the blade portion 69. Therefore, the cutting edge 64a of the rotary blade 16a is the blade portion 69. Lightly abuts on the arcuate surface 69b, or the cutting edge 69a of the blade portion 69 lightly abuts on the arcuate surface 64b of the rotary blade 16a, at which point the blade portion 69 stops. Therefore, the gap between the cutting edge 64a of the rotary blade 16a and the cutting edge 69a of the fixed blade 16b does not become too small or too large, and there is no variation in the adjustment work by the operator, and an inexperienced operator adjusts. Even if the work is performed, it is possible to always adjust the gap size to an appropriate level as in the case of a skilled worker. The position adjusting mechanism 63 is not essential in the present embodiment and can be omitted.

Next, the label opening device 10 of the present embodiment will be described with reference to FIGS. 1 and 9 to 11. FIG. 9 is a side view showing the label opening device 10 of the present embodiment. 10 (a) is a sectional view taken along line XX in FIG. 9, FIG. 10 (b) is a sectional view taken along line YY in FIG. 9, and FIG. 10 (c) is a sectional view taken along line ZZ in FIG. It is a cross-sectional view. 11 (a) and 11 (b) are front views showing a pair of transport belts constituting the label opening device 10.

As shown in FIG. 1, the label opening device 10 is arranged directly below the cutting device 16. The label opening device 10 receives individual labels L cut to a predetermined length from the label base material LM by the cutting device 16 and opens the labels while transporting them downward to fit the mandrel 18.

As shown in FIG. 9, the label opening device 10 includes a pair of endless transport belts 80a and 80b. Each of the transport belts 80a and 80b has a width narrower than the width of the label L (for example, about 25 mm), and is adapted to sandwich and suck and hold the central portion of the label L in the width direction.

One of the transport belts 80a is wound around the drive pulley 81a and the five guide pulleys 82a to 82d, and is configured to circulate in the direction of the arrow. The other transport belt 80b is wound around the drive pulley 81b and the four guide pulleys 83a to 83d, and is configured to circulate in the direction of the arrow. The drive pulleys 81a and 81b are driven synchronously by a motor (not shown), whereby the pair of transport belts 80a and 80b move at the same speed.

An endless auxiliary belt 80c is arranged above the other transport belt 80b. The auxiliary belt 80c is wound around the drive pulley 81c and the three guide pulleys 84a to 84c, and is configured to circulate in the direction of the arrow. The drive pulley 81c is rotationally driven by a motor different from the motor that drives the drive pulleys 81a and 81b. Therefore, the auxiliary belt 80c can move at a speed different from that of the pair of transport belts 80a and 80b.

In the upper part of the label opening device 10, the transport belt 80a and the auxiliary belt 80c are arranged so as to move in a state of facing each other and in contact with each other. As a result, the label L cut and formed by the cutting device 16 can be conveyed downward while being sandwiched between the belts 80a and 80c. Further, at this time, the moving speed of the auxiliary belt 80c may be made faster than that of the transport belt 80a, then slowed down, and then set to the same speed. By temporarily changing the moving speed of the auxiliary belt 80c so as to be different from that of the transport belt 80a, the opposing film portions forming the tubular label L sandwiched between the belts 80a and 80c move in the transport direction. The pseudo-adhesion state in each film portion is eliminated. As a result, the label L can be satisfactorily opened in the opening step described later.

In the upper part of the label opening device 10, the first suction chamber forming members 85a and 85b are arranged inside the pair of transport belts 80a and 80b. The first suction chamber forming member 85b arranged inside the transport belt 80b is a first suction chamber forming member arranged inside the transport belt 80a because the auxiliary belt 80c is arranged above the transport belt 80b. It is formed shorter than 85a. However, the auxiliary belt 80c and its drive mechanism may be omitted, and the first suction chamber forming member 85b may be formed to have the same length as the facing first suction chamber forming member 85a.

As shown in FIG. 10A, the first suction chamber forming member 85a is formed by three side walls, and the first suction chamber 86a is formed inside. A plurality of suction connection ports 87 are formed on the side wall of the first suction chamber forming member 85a, and each suction connection port 87 is connected to a suction pump (not shown).

Further, the first suction chamber forming member 85a has a first opening 88a in a portion without a side wall, and a transport belt 80a is arranged so as to close the first opening 88a. A plurality of suction holes 89 are formed in the transport belt 80a at predetermined intervals in the longitudinal direction. As a result, when the suction force of the suction pump acts in the first suction chamber 86a, the transport belt 80a can suck and hold the label L on the belt surface through the suction hole 89.

Further, in the portion of the first suction chamber forming member 85a that is in sliding contact with the transport belt 80a, a resin member 90 having good slipperiness with respect to the back surface of the belt is arranged. Specifically, the resin member 90 is preferably formed of a resin material having a low friction characteristic having a friction coefficient (JIS7125) of 0.1 to 0.2 μs. The resin member 90 has two rows of support portions, and these support portions are fitted into guide grooves formed on the back surface of the transport belt 80a. As a result, the transport belt 80a is configured to move while being in sliding contact with the back surface supported by the two rows of guide portions of the resin member 90. By supporting the transport belt 80a with the resin member 90 having good slipperiness in this way, as compared with the case where a large number of rotating members such as bearings are arranged and supported at intervals in the longitudinal direction of the belt, when the belt is moved. It has the advantage of being able to significantly reduce noise and manufacturing costs.

As shown in FIG. 10A, the first suction chamber forming member 85b arranged inside the other transport belt 80b is also formed in the same manner as the first suction chamber forming member 85a described above. Similarly, the back surface of the transport belt 80b is also supported by the resin member 90 having good slipperiness.

As described above, in the label opening device 10, the pair of first suction chamber forming members 85a and 85b are arranged inside the pair of transport belts 80a and 80b, respectively, and the first openings 88a and 88b are provided on the side surfaces facing each other. doing. Therefore, as shown in FIG. 10A, the pair of transport belts 80a and 80b that circulate and move between the pair of first suction chamber forming members 85a and 85b while being in contact with each other sandwich the label L between them. It can be transported downward while being sucked and held.

Referring to FIG. 9 again, a pair of second suction chamber forming members 91a and 91b are connected to the lower ends of the pair of first suction chamber forming members 85a and 85b, respectively. The pair of second suction chamber forming members 91a and 91b are arranged in an inverted V shape, and are arranged so that the distance between them increases as they go downward.

As shown in FIG. 10B, the second suction chamber forming member 91a is configured in the same manner as the first suction chamber forming member 85a. That is, a second suction chamber 92a is formed inside the second suction chamber forming member 91a, and a second opening 93a is provided on a side surface facing the other second suction chamber 92a, and the second opening 93a is provided. The transport belt 80a is arranged so as to close the portion 93a. The back surface of the transport belt 80a is supported by the resin member 90.

As shown in FIG. 10C, the other pair of second suction chamber forming member 91b is also configured in the same manner as the second suction chamber forming member 91a. The second suction chamber forming member 91b has a second opening 93b on the side surface facing the second suction chamber forming member 91a, and the transport belt 80b is arranged so as to close the second opening 93b. The back surface of the transport belt 80b is supported by the resin member 90. A suction connection port 87 is formed in each of the second suction chamber forming members 91a and 91b, respectively.

By arranging the second suction chamber forming members 91a and 91b in this way, suction is performed by a suction pump (not shown) into the second suction chambers 92a of the second suction chamber forming members 91a and 91b via the suction connection port 87. When a force is applied, the pair of transport belts 80a and 80b can transport the pair of transport belts 80a and 80b downward while sucking and holding the opposing film portions L1 and L2 constituting the tubular label L. Further, since the second suction chamber forming members 91a and 91b are arranged in an inverted V shape so as to spread downward, the label L is conveyed downward while being opened by the pair of conveying belts 80a and 80b.

As shown in FIG. 11, suction holes 89a1, 89a2, 89b, 89c are formed in the pair of transport belts 80a, 80b at intervals in the longitudinal direction of the belt. The suction holes 89a1, 89a2, 89b, 89c are formed for each transfer pitch of the label L conveyed by the pair of transfer belts 80a, 80b. Further, the suction holes 89a1, 89a2, 89b, 89c are formed as openings having the same diameter. A plurality of (three in this embodiment) suction holes 89a1 and 89a2 are formed in close proximity to the lower end of the label L on the pair of transport belts 80a and 80b. The suction holes 89b are formed at positions corresponding to the upper ends of the labels L transported by the transport belts 80a and 80b, and the suction holes 89c are formed at positions corresponding to the center of the label L in the length direction (conveyance direction). ing.

The lower end of the label L is the end on the side where the pair of transport belts 80a and 80b start to open when they approach the second suction chamber 92a. Therefore, it is preferable to increase the opening area of the suction holes 89 in order to reliably attract the film portions L1 and L2 constituting the label L to the respective transport belts 80a and 80b. Specifically, in the present embodiment, in each of the transport belts 80a and 80b, a plurality of suction holes 89a1 and 89a2 are formed at positions corresponding to the lower ends of the label L.

Here, the suction holes 89a1 and 89a2 are preferably formed at positions where the transport belt 80a and the transport belt 80b do not overlap each other. Specifically, in the transport belt 80a, two suction holes 89a1 are formed on the upper side near both side edges in the belt width direction, and one suction hole 89a1 is formed on the lower side in the central part of the belt width. In the transport belt 80b, one suction hole 89a2 is formed on the upper side in the central portion of the belt width, and one suction hole 89a1 is formed on the lower side thereof near both side edges in the belt width direction. By shifting the positions of the suction holes 89a in this way, even when the opposing film portions L1 and L2 constituting the folded tubular label L are in a pseudo-adhesive state due to, for example, electrostatic force, the respective film portions L1 and L1 By adsorbing different parts of L2, the opening can be made more reliably. As shown by the alternate long and short dash line in FIG. 11, the other suction holes 89b and 89c may be formed at positions shifted between the transport belts 80a and 80b for the same reason as the suction holes 89a1 and 89a2. ..

In the present embodiment, the suction holes 89a1 and 89a2 formed at positions corresponding to the lower end portion of the label L as described above have suction holes formed at positions where the opening area corresponds to the other portion of the label L. A plurality of them are formed so as to be larger than the opening areas of 89b and 89c, respectively.
However, the present invention is not limited to this, and the opening area may be increased by forming each of the suction holes 89a1 and 89a2 with a diameter larger than that of the suction holes 89b and 89c.

Referring to FIG. 9 again, the first suction chamber forming member 85a and the second suction chamber forming member 91a are rotatably connected by a shaft 94, and the first suction chamber 86a and the second suction chamber 86a and the second suction are connected at this connecting portion. The chamber 92a communicates with each other. Similarly, the first suction chamber forming member 85b and the second suction chamber forming member 91b are rotatably connected by the shaft 94, and the first suction chamber 86a and the second suction chamber 92a are connected to each other at this connecting portion. Communicate with each other.

Plate-shaped fixing portions 95 are projected from the second suction chamber forming members 91a and 91b, respectively. A needle 96 is attached to the fixing portion 95. Further, an elongated hole is formed in the fixing portion 95, and the fixing portion 95 is fixed to the frame 3 (see FIG. 3) of the label fitting device 1 by a bolt inserted through the elongated hole. Further, a scale plate 97 is attached to the frame 3, and the second suction chamber forming member 91a with respect to the first suction chamber forming members 85a and 85b is at a position indicated by the needle 96 provided on the fixing portion 95 on the scale plate 97. , 91b can be checked and set.

As described above, the first suction chamber forming members 85a and 85b and the second suction chamber forming members 91a and 91b are rotatably connected by the shaft 94, respectively, so that the bolt fastening of the fixing portion 95 can be loosened. The inclination angle (spread angle) of the second suction chamber forming members 91a and 91b with respect to the first suction chamber forming members 85a and 85b can be adjusted. Therefore, for example, when the width dimension of the label L is changed, the label L can be formed in an appropriate opening state by adjusting the inclination angles of the second suction chamber forming members 91a and 91b.

Further, in the label opening device 10 of the present embodiment, since the first suction chamber 86a and the second suction chamber 92a communicate with each other, the pair of transport belts 80a and 80b are connected to the first suction chamber forming members 85a and 85b. Even when moving the boundary portion with the second suction chamber forming members 91a and 91b, the suction force can be applied to the pair of transport belts 80a and 80b without interruption. Therefore, the label L is conveyed downward while being opened in a tubular shape with the film portions L1 and L2 facing each other being reliably attracted and held by the respective conveying belts 80a and 80b. Therefore, the label L can be more reliably fitted to the mandrel 18.

Next, the mandrel 18 of the label fitting device 1 will be described with reference to FIGS. 12 to 15. FIG. 12 is a diagram showing an elevating mechanism of the mandrel 18 and a container mounting table 19. FIG. 13 is a plan view including a partial cross section showing the mandrel 18. 14A and 14B show an open / closed state of the mandrel 18, FIG. 14A is a side view of the mandrel in a closed state, and FIG. 14B is a side view of the mandrel in an open state. 15 (a) is a front view of the mandrel cam, and FIG. 15 (b) is a plan view showing a state in which the label is fitted on the mandrel 18.

A large number of mandrel 18s in the present embodiment are provided on the outer periphery of the rotating drum 102 constituting the rotary device 100 at equal pitches. As shown in FIG. 12, a large number of container mounting tables 19 set at a constant height with a predetermined interval are arranged in the circumferential direction of the rotary table 104 of the rotary device 100 via the support shaft 106. The rotary drum 102 and the rotary table 104 are integrally rotationally driven around a rotary shaft (not shown). A mandrel cam body 108 is fixed to the outer peripheral surface of the rotating drum 102 corresponding to each container mounting table 19.

As shown in FIG. 13, the mandrel 18 includes a pair of mandrel members 18a and 18b that expand the label L supplied from the label opening device 10 in the open state. In FIG. 13, the rotation direction of the rotary device 100 is indicated by an arrow R. In the following, the front of the rotation direction R is referred to as "front" and the rear is referred to as "rear". The mandrel 18 is provided corresponding to each container mounting table 19, and is arranged so as to be front-rear in the rotation direction (movement direction) of the rotary table 104.

As shown in FIG. 12, the mandrel 18 passes below the transport belts 80a and 80b of the label opening device 10 and between the guide pulleys 82d and 83c. Further, the mandrel 18 is supported by the base 112. The base 112 is connected to the support bar 114, and a cam follower 116 provided at the lower end of the support bar 114 is fitted to the annular cam 118. With this configuration, the mandrel 18 moves up and down with the rotation of the rotary table 104. Specifically, the mandrel 18 rises most when passing below the transport belts 80a and 80b, then gradually lowers, and descends most at the label fitting completion position.

The expanded portions 110a and 110b of the mandrel members 18a and 18b project upward and are thin and curved in a convex shape, and as shown in FIG. 13, they come into contact with each other along a pair of slide guides 120 provided at intervals. It is movable. That is, the base portion 122a of the front mandrel member 18a is fixed to the erection member 126 attached to the slide member 124 that slides on the slide guide 120. On the other hand, in the rear mandrel member 18b, the rotating shaft 130 is rotatably supported by the base 128 provided on each slide member 124, and the base portion 122b of the rear mandrel member 18b is fixed to the rotating shaft 130. Further, a cam lever 138 having a cam follower 136 that moves along the cam groove 134 of the cam plate 132 attached to the base 112 is fixed to the tip of the rotating shaft 130.

As shown in FIG. 14, the cam groove 134 is formed by bending downward so as to tilt the rear mandrel member 18b by rotating the rotation shaft 130 in the left-right direction in which the mandrel members 18a and 18b move. .. Therefore, when the cam follower 136 is located at the end of the inclined portion 134b of the cam groove 134, the mandrel members 18a and 18b are close to each other, and 110b of the rear mandrel member 18b is inclined toward the front mandrel member 18a. Will be. On the other hand, when the cam follower 136 is located at the end of the horizontal portion 134a of the cam groove 134, both the expanding portions 110a and 110b of the mandrel members 18a and 18b face upward and are separated from each other.

As shown in FIG. 13, vertical concave grooves 140 are provided on the back surfaces of the erection member 126 and the base 128, and each concave groove 140 has a roller 146 of a cam lever 144 fixed to each support shaft 142. It is fitted. Further, cam levers 150a and 150b having cam followers 148a and 148b are fixed to the rear ends of the support shafts 142.

The cam followers 148a and 148b are fitted in the cam grooves 108a and 108b of the mandrel cam body 108 fixed to the outer peripheral surface of the rotating drum 102. As shown in FIG. 15A, the cam grooves 108a and 108b have an interval between the approaching portion 109a located at the upper part and bringing the two mandrel members 18a and 18b closer to each other and the inclined portion 109b whose interval increases downward. It is composed of a straight portion 109c which is parallel to the vertical direction. By moving the cam followers 148a and 148b along these cam grooves 108a and 108b, the mandrel members 18a and 18b approach each other at the upper part and separate from each other at the lower part. When the pair of mandrel members 18a and 18b are located at the upper part and approach each other, the expanded portion 110b of the rear mandrel member 18b is inclined toward the front mandrel member 18a as shown in FIG. 15 (b). As a result, the label L supplied from the label opening device 10 in the open state can be reliably fitted around the mandrel members 18a and 18b.

Next, the step of fitting the label L to the container C by the mandrel 18 will be described with reference to FIG. 16 (a) to 16 (d) are diagrams showing the steps in which the label L is fitted to the container C in sequence.

As shown in FIG. 16A, the mandrel 18 receives the label L from the label opening device 10 at a position above the container C placed on the container mounting table 19 with the label L opened. At this time, the opened labels L are fitted around the expanded portions 110a and 110b of the respective mandrel members 18a and 18b in a posture in which the rear mandrel members 18b are close to each other and the rear mandrel members 18b are inclined toward the front mandrel members 18a.

After that, as shown in FIG. 16B, the label L is expanded in a substantially cylindrical shape when the mandrel members 18a and 18b are separated from each other and the rear mandrel member 18b is in an upright state. In this state, the mandrel 18 is lowered to insert the container C into the label L from below. Then, as shown in FIG. 16C, when the mandrel 18 descends to the lower end of the container C, the lower end edge of the label L protrudes from the outer circumference of the container mounting table 19 to both sides in the radial direction as shown in FIG. It comes into contact with the stopper portion 19a (only one of which is shown). As a result, the label L is placed on the container mounting table 19 around the container C. After that, as shown in FIG. 16D, the mandrel 18 is further lowered so that the expanded portions 110a and 110b of the mandrel members 18a and 18b come out from the inside of the label L.

The container C in which the label L is fitted around in this way is discharged from the rotary device 100 (see FIG. 12) and conveyed to a subsequent process. The post-step includes, for example, a heat shrinking step of the label L by a heating device. By being heat-shrinked in this way, the label L is attached in close contact with the outer peripheral surface of the container C. On the other hand, after the container C is discharged from the container mounting table 19, the mandrel 18 moves up and moves around the container mounting table 19 and returns to the position and state shown in FIG. 16 (a). As a result, the next label L is ready to be received.

It goes without saying that the present invention is not limited to the above-described embodiments and modifications thereof, and various modifications and improvements are possible.

1 Label fitting device (cylindrical film fitting device)
2 Guide roller 3,65 frame 10 Label opening device 12 Inner guide device 14 Base material delivery roller 14a Drive roller 14b Driven roller 15a, 15b Large diameter part 16 Cutting device 16a Rotating blade 16b Fixed blade 18 Mandrel 18a Front mandrel member 18b Rear mandrel Member 19 Container mount 19a Stopper 20 Inner guide 22 Support mechanism 23a, 23b Upstream support roller 24 Fold relaxation mechanism 25a, 25b Downstream support roller 26 Supported part 28 Connecting member 30 Sending plate 32 Base member 38a, 38b Upper end Part 40a, 40b Introduction plate 42a, 42b Upstream internal roller 44a, 44b Downstream internal roller 45 Side wall surface or inner pressing surface 46 Magnet 48a, 48b Outer pressing roller 50 Mounting member 52 Guide shaft 54 Guide member 56 Retaining member 58 Guide Shaft 59 Slide member 60 Base plate 61 Screw shaft 62 Handle 62a, 62b Slide block 63 Position adjustment mechanism 63a, 63b, 63c, 67 Bearing 64,69 Blade part 64a, 69a Blade tip, 64b, 69b Arc surface 66 Base 66a Shaft 68 Stand 69c Long hole 70 Fixing member 71 Fixing bolt 72 Extruding unit 73 Unit body 74 Stopper bolt 75 Extruding pin 80a, 80b Conveying belt 80c Auxiliary belt 81a, 81b
81c Drive pulley 82a to 82d, 83a to 83d, 84a to 84c Guide pulley 85a, 85b First suction chamber forming member 86a First suction chamber 87 Suction connection port 88a, 88b First opening 89, 89a, 89b, 89c Suction hole 90 Resin member 91a, 91b Second suction chamber forming member 92a Second suction chamber 93a, 93b Second opening 94 Shaft 95 Fixing part 96 Needle 97 Scale plate 100 Rotary device 102 Rotating drum 104 Rotating table 106, 142 Support shaft 108 Mandrel Cam body 108a, 108b Cam groove 109a Approaching part 109b Straight part 109c Inclined part 110a, 110b Expanding part 112 Base 114 Support bar 116, 136, 148a, 148b Cam follower 118 Cam 120 Slide guide 122a, 122b Base 124 Slide member 126 Erecting member 128 Base 130 Rotating shaft 132 Cam plate 134 Cam groove 134a Horizontal part 134b Inclined part 138, 144, 150a, 150b Cam lever 140 Concave groove 146 Roller C container L label L1, L2 Film part O1, O2 Fold

Claims (5)

A tubular film opening device that opens while transporting a tubular film formed to a predetermined length in order to fit it on a mandrel.
A pair of first suction chamber forming members, each of which has a first suction chamber formed inside and a first opening communicating with the first suction chamber on side surfaces facing each other.
It is connected to each lower end of each of the pair of first suction chamber forming members, and is arranged so that the distance between them becomes wider as the distance between them decreases, and a second suction chamber is formed inside and a second suction chamber is formed. A pair of second suction chamber forming members each having a second opening communicating with the
A pair of endless transport belts arranged so as to circulate and move with the first opening and the second opening closed, and a plurality of suction holes are formed at predetermined intervals in the longitudinal direction. , With
The tubular film is transported downward while being sandwiched by the pair of transport belts that move the position corresponding to the first opening, and the pair of transports that move the position corresponding to the second opening. By being sucked and held by a belt and conveyed downward, it is opened in a tubular shape and fitted to the mandrel.
The first suction chamber and the second suction chamber communicate with each other at a connecting portion between the first suction chamber forming member and the second suction chamber forming member , and a pair of transfer belts form a first suction chamber forming member. A tubular film opening device having a configuration in which a suction force is applied to a pair of transport belts without interruption even when the boundary portion between the surface and the second suction chamber forming member is moved. In the tubular film opening device according to claim 1,
The second suction chamber forming member is a tubular film opening device in which an inclination angle with respect to the first suction chamber forming member is adjustablely connected. In the tubular film opening device according to claim 1 or 2.
The suction hole is formed so that the opening area is larger than that of other positions at a position corresponding to the lower end portion of the tubular film to be transported, which is sandwiched between the pair of transport belts. apparatus. In the tubular film opening device according to claim 3,
A plurality of suction holes are formed in each of the transport belts at positions corresponding to the lower ends of the tubular films that are sandwiched and transported between the pair of transport belts, and are formed in the lower ends of the tubular films. A tubular film opening device in which a plurality of suction holes formed at corresponding positions are formed at positions where one and the other of the pair of transport belts do not overlap each other. In the tubular film opening device according to any one of claims 1 to 4.
A tubular film opening device in which the pair of transport belts are supported while being slidably contacted by the first suction chamber forming member and the resin member provided on the second suction chamber forming member.

Images