JP2018002174A - Position adjustment unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable position adjustment of a plurality of pinch rollers with a single adjustment shaft.CONSTITUTION: An adjustment shaft 62 is positioned along an arrangement direction of a plurality of pinch rollers arranged in a lateral row. A plurality of sleeves 71-74 are movably attached along an axial direction on the adjustment shaft, and the plurality of sleeves are provided with a plurality of movable bodies 81-84 that respectively move along the axis direction of the adjustment shaft in response to rotation of the sleeves. The pinch rollers move respectively in coordination with movement of the movable bodies. The adjustment shaft is arranged so as to be rotatable around its axis and movable in its axis direction. The sleeves assume a first state in which they integrally rotate with the adjustment shaft and a second state in which they idle depending on a relative position in the axis direction associated with movement of the adjustment shaft. All of the sleeves enter the first state or one of the sleeves enter the first state depending on the position of the adjustment shaft in the axis direction so that all of the pinch rollers are collectively moved or one pinch roller is moved.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a position adjustment unit, for example, a position adjustment unit used for position adjustment of a machine element such as a pinch roller of a four-side seal packaging machine.

  A four-side sealed package that is one form of various packaging forms has a configuration in which the upper film and the lower film in a state where the upper and lower sides of the package are sandwiched are heat sealed and sealed. A four-side seal wrapping machine for manufacturing such a four-side sealed wrapping body includes a lower film transporting means for transporting a belt-like lower film, and a packaged article supply means for supplying a packaged article on the lower film in the middle of the transport. The upper film supply means for supplying the belt-like upper film so as to overlap the lower film and the upper and lower films sandwiched between the upper and lower films at a predetermined position after the package is supplied A side seal device and a top seal device are provided on the downstream side of the device. The side seal device includes a pair of bar sealers that are arranged on both the left and right sides in the traveling direction of the package and sandwich the upper film and the lower film from above and below at each position. The top seal device includes a pair of upper and lower top sealers that are located on the downstream side of the side seal device and extend in a direction crossing the film transport direction. Further, the four-side seal packaging machine includes a cutter device, cuts the film portion sealed by the side seal device or the top seal device, and manufactures individual packages.

  Furthermore, a pinch roller that sandwiches the upper film and the lower film from above and below is disposed downstream from the point where the upper film and the lower film overlap and upstream of the side seal device. With this pinch roller, the traveling direction of the film is controlled while applying a conveying force to both films, so that desired film portions of the upper film and the lower film reach the side seal device and are side sealed.

  Further, the packaged article supply means arranges a plurality (for example, three) of packages to be placed side by side, and seals the periphery of the plurality of packages to be packaged horizontally by the side seal device and the top seal device. However, there is a four-side seal wrapping machine that wraps a plurality of items to be packaged at a time in a horizontal row by cutting. This type of four-side seal packaging machine is disclosed in, for example, Patent Document 1.

  For example, the pinch roller is arranged in a portion where there is no package in the width direction orthogonal to the traveling direction of the upper film and the lower film, rotates with both films sandwiched from above and below, and conveys the film against the film. give. Therefore, for example, when the width dimension of the package changes, it is necessary to move the pinch roller in the width direction accordingly. In addition, it may be necessary to finely adjust the position of a predetermined pinch roller in order to guide the desired positions of the upper film and the lower film to the side seal device.

  The pinch roller position adjustment mechanism of a conventional four-sided seal wrapping machine is composed of a screw shaft and a slider that is screwed to this and moves in the axial direction. By rotating the screw shaft, the position of the slider can be changed. The position of the pinch roller in the width direction is adjusted.

JP2007-39050

  In the conventional position adjustment mechanism, one adjustment mechanism is provided for each pinch roller. Therefore, when a plurality of pinch rollers are arranged in the width direction, the position adjustment mechanisms are arranged in the transport direction by the number of pinch rollers. It will be arranged side by side, and the structure will be complicated. Further, since an adjustment mechanism is provided for each individual pinch roller, the adjustment of the position in the width direction of the pinch roller is also performed individually, and the adjustment work for the position becomes complicated.

  In order to solve the above-described problems, a position adjustment unit according to the present invention is (1) a position adjustment unit that performs position adjustment in the arrangement direction of a plurality of machine elements arranged at intervals. An adjustment shaft arranged to extend in the arrangement direction of the elements, a plurality of sleeves attached to the adjustment shaft along the axial direction, and a plurality of sleeves linked to the plurality of sleeves. A movement mechanism that moves along the axial direction of the adjustment shaft as it rotates, and the adjustment shaft is rotatable around the axis and is arranged to be movable in the axial direction. A plurality of sleeves are attached to a plurality of sleeves so as to be movable in the axial direction, and each of the plurality of sleeves rotates integrally with the adjustment shaft according to a relative position in the axial direction accompanying the movement of the adjustment shaft. First state The sleeve in the first state is different depending on the axial movement position of the adjustment shaft, and at least one of the plurality of sleeves is in the first state. Then, the machine element is moved in the arrangement direction by the moving mechanism.

  According to the present invention, movement in the arrangement direction of a plurality of machine elements can be performed by rotation of one adjustment shaft. Therefore, in the past, as the number of installed machine elements increased, the number of adjusting shafts increased accordingly. However, the present invention requires only one adjusting shaft even if the number of installed machine elements increases, so the structure is simple. It becomes compact and can suppress the enlargement of the whole mounted device.

  When the adjustment shaft rotates, the position of the machine element linked to the sleeve in the first state moves in the axial direction of the adjustment shaft, that is, the arrangement direction of the machine element. In the present invention, all the machine elements can be moved together by setting all the sleeves to the first state, and further, each machine element can be individually set by setting any sleeve to the first state. The position of the individual machine elements can be adjusted more accurately by moving to.

  (2) The outer peripheral surface of the sleeve has a male screw portion, and the moving mechanism includes a moving body having a female screw portion that meshes with the male screw portion, and the moving body moves along with the movement of the moving body in the axial direction. It is preferable that the mechanical element linked to the machine moves in the same direction. If it does in this way, a movable body and by extension, a machine element can be moved with a simple structure.

  (3) The sleeve has a protrusion protruding inside, and an outer circumferential surface of the adjustment shaft facing the inner circumferential surface of the sleeve has a continuous groove in the circumferential direction and an endless shape thereof. A recess provided adjacent to the groove, and the second state when the protrusion enters the endless groove, and the first state when the protrusion enters the recess. It is good to comprise so that it may become. The protrusion corresponds to the ball 64a at the tip of the ball plunger 64 of the embodiment, the tip of the pen cylinder rod, or the like. The recess corresponds to the coupling hole 65 of the embodiment. In the embodiment, the coupling hole 65 is a spherical surface matching the ball 64a. However, the coupling hole 65 may take any other shape such as a rectangular shape, and may not be an endless shape, such as a groove extending in the circumferential direction. It is only necessary that the relative circumferential movement stops at any angular position.

  When the protrusion enters the endless groove, as the adjustment shaft rotates, the protrusion relatively moves in the endless groove, so that the protrusion rotates idly (enters the second state). In other words, the dimensions of the protrusion and the groove, the amount of the protrusion entering, and the like are set so that the relative movement can be performed. On the other hand, when the protrusion enters the recess, the protrusion hits the inner surface of the recess as the adjustment shaft rotates, and the adjustment shaft and the sleeve can rotate together (first state). Then, by moving the adjustment shaft in the axial direction, the partner into which the protrusion enters can be switched between the recess and the groove. Therefore, the first state and the second state can be switched with a simple configuration.

  (4) The protrusion may be configured such that a protrusion amount with respect to the inside is displaceable. By allowing the amount of protrusion to be displaced, for example, when the adjustment shaft is moved in the axial direction, the amount of protrusion is reduced, and the amount of protrusion is increased when entering the recess or groove. It is good because it can be firmly joined when entering. Displaceable includes both those that are displaced based on an external biasing force with respect to the projection, such as a ball plunger and other plungers, and those that spontaneously change the amount of displacement, such as a pen cylinder. Those that change spontaneously may be able to move the adjustment shaft in the axial direction with a small force.

  (5) The machine element may be at least one of a pinch roller, a bar sealer, and a side guide used in a packaging machine.

  According to the present invention, the position adjustment of a plurality of pinch rollers and other machine elements can be performed with a single adjustment shaft, and the structure of the machine can be simplified.

It is a front view which shows suitable one Embodiment of the four-side seal packaging machine by which the position adjustment unit which concerns on this invention is mounted. It is a top view which shows suitable one Embodiment of the four-side seal packaging machine by which the position adjustment unit which concerns on this invention is mounted. It is a perspective view which shows suitable one Embodiment of the apparatus containing the position adjustment unit which concerns on this invention. It is the side view. It is AA arrow sectional drawing in FIG. It is a perspective view which shows suitable one Embodiment of the apparatus containing the position adjustment unit which concerns on this invention. It is sectional drawing which shows suitable one Embodiment of the position adjustment unit which concerns on this invention. It is a bottom view which shows suitable one Embodiment of the apparatus containing the position adjustment unit which concerns on this invention. It is a bottom partial fragmentary sectional view showing one suitable embodiment of a device containing a position adjustment unit concerning the present invention. It is a figure which shows the relationship between an adjustment shaft and a sleeve.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the present invention is not construed as being limited thereto, and various changes, modifications, and improvements can be made based on the knowledge of those skilled in the art without departing from the scope of the present invention.

  1 and 2 show a part of a four-side seal packaging machine according to an embodiment of the present invention. The four-sided seal packaging machine 10 is configured such that strip-shaped packaging films (upper and lower films 11 and 12) continuously drawn from two raw rolls (not shown) overlap vertically at a predetermined position. Is done. 1 and 2 show a state in which two packaging films (upper film 11 and lower film 12) have already overlapped and an article to be packaged is sandwiched inside. Actually, although not shown in the figure, the lower film 12 is transported in a substantially horizontal state on the upstream side of the figure, or the lower film 12 is predetermined during the transport in the lower film transport device. There are a package supply device for supplying a package to a position, an upper film supply device for supplying the upper film 11 on the lower film 12, and the like. The to-be-packaged article supply apparatus supplies the three to-be-packaged articles on the lower film 12 so as to be arranged horizontally. The upper film supply device supplies the upper film 11 so as to overlap the lower film 12 at a predetermined position after the article to be packaged is supplied onto the lower film 12. As a result, the article to be packaged is sandwiched between the upper film 11 and the lower film 12.

  The process after the article to be packaged is sandwiched between the upper and lower films 11 and 12 as described above is performed by the apparatus shown in FIGS. That is, first, the four-side seal wrapping machine has an upstream pinch roller device 14, a side seal device 15, a downstream pinch roller device 16, a side cutter device 17, a vertical holding belt 18, an end seal device 19, in order from the upstream side. An end cutter device 20 and a carry-out conveyor device 21 are provided.

  The side seal device 15 includes a pair of upper and lower rectangular sealers 15a. The upper film 11 is heated and pressurized by sandwiching the upper film 11 and the lower film 12 from above and below with a predetermined pressure. , The contact portion of the lower film 12 is heat-sealed. Four sets of the sealers 15a are arranged at a predetermined interval in a direction crossing the film conveyance direction. Therefore, when the upper film 11 and the lower film 12 pass between the upper and lower sealers 15a, the corresponding portions are heat-sealed, and the side seal portion 23 is formed. Then, an article to be packaged is enclosed between the left and right side seal portions 23. In other words, in the present embodiment, since the objects to be packaged are arranged between the upper film 11 and the lower film 12 in a three-row state, the film part between the left and right objects to be packaged (part where there is no object to be packaged) ) Is provided with a side seal portion 23.

  The pinch roller device 14 arranged on the upstream side of the side seal device 15 is composed of four pairs of upper and lower pair of pinch rollers 30 (representing individual pinch rollers) arranged in a horizontal row in a direction crossing the film conveying direction. In the case shown, the reference numeral is “30”, and when pinch rollers are specified separately, another reference numeral is attached). The pinch roller 30 rotates in a state where the upper film 11 and the lower film 12 are sandwiched from above and below, and gives a conveying force directed in a predetermined direction to the upper film 11 and the lower film 12. The predetermined direction is a direction in which the desired positions of the upper film 11 and the lower film 12 reach the sealer 15 a of the side seal device 15.

  The pinch roller device 16 arranged on the downstream side of the side seal device 15 is composed of four pairs of upper and lower pair of pinch rollers 30 arranged in a horizontal row in a direction crossing the film transport direction, and the side seal portion 23 is The upper film 11 and the lower film 12 are conveyed by rotating while being gripped from above and below. Further, the pinch roller device 16 on the downstream side grips the portion of the side seal portion 23 in which the upper film 11 and the lower film 12 are integrated with a pair of pinch rollers 30 by heat sealing. The rotational force is smoothly and reliably transmitted to the upper film 11 and the lower film 12 and can be transported, and also has a function of firmly heat-sealing by pressing the heated film portion. Moreover, in the present embodiment, by providing the pinch rollers 30 in the respective side seal portions 23, even the wide upper film 11 and the lower film 12 can be conveyed straight without causing distortion.

  The side cutter device 17 cuts the side seal portion 23, and includes a disc-shaped cutting blade 17a having a sharp tip and a disc-shaped receiving blade 17b having a flat peripheral surface. The four side cutter devices 17 are also arranged in a horizontal row in a direction crossing the film conveyance direction. The center two side cutter devices 17 cut the center of the corresponding side seal portion 23. The side cutter devices 17 on both sides are for cutting the end edges of the side seal portions 23 formed on the both side edges of the upper film 11 and the lower film 12 to make the seal width uniform. And by passing this side cutter apparatus 17, the upper film 11 and the lower film 12 will be isolate | separated into 3 rows.

  The upper and lower restraint belts 18 are separated from each other in three rows by the side cutter device 17, and the upper film 11 and the lower film 12 that are side-sealed and integrated are sandwiched from the upper and lower sides, without causing lateral displacement and the like. It is conveyed and supplied to the end seal device 19 in the next stage.

The end seal device 19 seals the upper film 11 and the lower film 12 conveyed in a state of being separated into three rows in the advancing direction lateral direction to form an end seal portion 25.
The end seal device 19 includes a pair of upper and lower rotating shafts 19a and a top sealer 19b attached to the rotating shaft 19a. The upper and lower rotary shafts 19a and the top sealer 19b rotate in synchronism, and the seal surface at the tip of the pair of upper and lower top sealers 19b sandwiches the upper film 11 and the lower film 12 and heat-seals with each rotation. Thereby, the peripheral edge of the upper film 11 and the lower film 12 is sealed by the side seal part 24 and the end seal part 25, and the package is sealed.

  The end cutter device 20 cuts the end seal portion 25 to separate it into front and back, and manufactures individual packaging bodies 27. End cutter device 20 attaches cutter blade 20b to a pair of upper and lower rotating shafts 20a, and upper and lower cutter blades 20b come into contact with each other when rotating shaft 20a makes one rotation, and upper and lower films 11 and 12 are in contact with each other. The end seal portion 25 is cut.

  In this embodiment, the upstream pinch roller device 14 and the pinch roller 30 of the downstream pinch roller device 16 are linked to the position adjustment unit 32, respectively. Can move in the left-right direction perpendicular to the film transport direction. In addition to the pinch roller 30 and the position adjustment unit 32, the pinch roller devices 14 and 16 include a drive mechanism for rotating the pinch roller 30 and the like. Specifically, the pinch roller devices 14 and 16 have configurations shown in FIG. As is apparent from the figure, in this embodiment, the upstream pinch roller device 14, the side seal device 15, and the downstream pinch roller device 16 are integrally configured.

  In these integrated device units, the outer frame 33 is disposed so as to straddle the conveyance path of the upper film 11 and the lower film 12. The outer frame 33 includes side walls 34 that are erected on the left and right sides in the film transport direction, and a connecting plate 35 that connects the upper ends of the left and right side walls 34.

  The side seal device 15 is installed in a central region in the outer frame 33. Specifically, a slider 15c is movably linked to a guide rail 15b arranged so as to span between the left and right side walls 34, and the upper and lower sealers 15a are linked to the slider 15c. The pair of upper and lower sealers 15a are movable along the guide rail 15b together with the slider 15c, and are installed at appropriate positions in the left-right direction intersecting the film transport direction.

In addition, a drive rotation shaft 36 of the pinch roller 30 is disposed so as to span between the left and right side walls 34. Both ends of the drive rotation shaft 36 are supported by bearings 37 provided on the side wall 34, and one end 36 a of the drive rotation shaft 36 protrudes outside the side wall 34 and is linked to the drive motor 38. The driving rotary shaft 36 is arranged at two positions in the front and rear direction along the film transport direction. The two drive rotary shafts 36 are for the upstream pinch roller device 14 and for the downstream pinch roller device 16. In the present embodiment, the pinch roller driving mechanism and the position adjustment unit 32 have the same configuration in each of the pinch roller devices 14 and 16. Hereinafter, the structure of the pinch roller drive mechanism and the position adjustment unit 32 will be described mainly using the upstream pinch roller device 14 (cross-sectional view of FIG. 5 and the like) as an example. The position adjustment unit 32 linked to the same also has the same configuration. The driving rotary shaft 36 includes a first pinch roller unit 41, a second pinch roller unit 42, a third pinch roller unit 43, and a fourth pin in order along the axial direction. The pinch roller unit 44 is attached so as to be movable in the axial direction. A guide rod 45 is disposed near the lower side of each pinch roller unit so as to pass between the left and right side walls 34 of the outer frame 33, and is passed between the side walls 34 on the back side of each pinch roller unit. Thus, the guide rail 46 is arranged. As will be described later, each pinch roller unit is linked to the guide rod 45, the guide rail 46, and the like, and can move in the axial direction of the drive rotary shaft 36 while maintaining a stable posture.

  The 1st pinch roller unit 41 arrange | positions the 1st upper side rotating shaft 41b and the 1st lower side rotating shaft 41c so that rotation around each axis | shaft is possible in the box 41a located upwards. The first upper rotating shaft 41b and the first lower rotating shaft 41c are arranged in parallel vertically. A first upper pinch roller 51a and a first lower pinch roller 51b are attached to one ends of the first upper rotary shaft 41b and the first lower rotary shaft 41c, respectively. The first upper pinch roller 51a and the first lower pinch roller 51b face each other and are configured to sandwich the upper film 11 and the lower film 12 from above and below with a predetermined pressure. The first upper rotating shaft 41b and the first lower rotating shaft 41c are provided with gears 41d, respectively, and these gears 41d are engaged with each other. Thereby, the 1st upper side rotating shaft 41b and the 1st lower side rotating shaft 41c rotate in synchronization.

  The first lower rotating shaft 41c is linked to the driving rotating shaft 36 via a power transmission mechanism 41e. The power transmission mechanism 41e has both ends of a connecting shaft 41g supported by bearings in a cylindrical outer case 41f arranged so as to extend in the up-down direction, and a driving rotary shaft 36 and a first lower side via bevel gears 41h, respectively. It is configured to be linked to the rotating shaft 41c. As a result, when the drive rotary shaft 36 rotates, the first lower rotary shaft 41c and then the first upper rotary shaft 41b rotate following the rotation. A key 47 is connected to a predetermined position on the side peripheral surface of the drive rotary shaft 36 so as to extend in the axial direction. A key groove is formed along the axial direction on the inner peripheral surface of the bevel gear 41h linked to the driving rotary shaft 36, and the key 47 is aligned with the key groove so that the bevel gear 41h In addition to being movable in the direction, it rotates upon receiving the rotation of the drive rotary shaft 36. As will be described later, the first pinch roller unit 41 is linked to the position adjustment unit 32, and the entire unit moves along the axial direction of the drive rotation shaft 36 by driving the position adjustment unit 32. Since the key 47 coincides with the key groove of the bevel gear 41h at any position in the axial direction, the first upper pinch roller 51a and the first lower pinch roller are accompanied by the rotation of the driving rotary shaft 36. 51b is rotationally driven in synchronism and sandwiches and conveys the upper film 11 and the lower film 12 from above and below with a predetermined pressure.

  In addition, a connecting plate 48 is suspended below the first pinch roller unit 41. An L-shaped plate 49 is connected below the center of the surface of the connection plate 48 (the front side of the outer frame 33). One surface of the L-shaped plate 49 protrudes forward in a direction orthogonal to the surface of the connecting plate 48 and is arranged along the vertical direction (vertical direction), and the other surface that is bent forms the connecting plate 48. One surface of the L-shaped plate 49 has a through hole 49a, and the guide rod 45 is inserted into the through hole 49a (see FIG. 4 and the like). The L-shaped plate 49 is guided by the guide rod 45 by the linkage of the through hole 49 a and the guide rod 45, and can move along the guide rod 45. A set screw lever 50 is attached to the tip of one surface of the L-shaped plate 49. A female screw part is formed on one surface of the L-shaped plate 49 so as to reach the through hole 49a from the tip, and the female screw part and the male screw part provided at the tip of the set screw lever 50 are linked to each other. A set screw lever 50 is attached. Then, by tightening the set screw lever 50, the tip of the set screw lever 50 comes into contact with a groove 45a provided on the peripheral surface of the guide rod 45 in the longitudinal direction with a predetermined pressure, and the L-shaped plate 49 and the first The movement of the pinch roller unit 41 is suppressed. Further, when the set screw lever 50 is loosened, the L-shaped plate 49 and thus the first pinch roller unit 41 can be moved.

  A slider 55 is provided on the back side of the connecting plate 48 (the back side of the outer frame 33), and the slider 55 is linked to the guide rail 46. As described above, the first pinch roller unit 41 is linked to the guide rod 45 and the guide rail 46 below the first pinch roller unit 41. And hold a stable posture.

  The second pinch roller unit 42 arranges a second upper rotating shaft 42b and a second lower rotating shaft 42c so as to be rotatable around the respective axes in an upper space of a box 42a arranged to extend in the vertical direction. . The second upper rotating shaft 42b and the second lower rotating shaft 42c are arranged in parallel in the vertical direction. A second upper pinch roller 52a and a second lower pinch roller 52b are attached to one ends of the second upper rotary shaft 42b and the second lower rotary shaft 42c, respectively. The second upper pinch roller 52a and the second lower pinch roller 52b face each other and are configured to sandwich the upper film 11 and the lower film 12 from above and below with a predetermined pressure. The second lower rotating shaft 42c is linked to the driving rotating shaft 36 via a power transmission mechanism 42e composed of gears or the like. Further, a key 56 is provided on the peripheral surface of the region in the second pinch roller unit 42 of the driving rotary shaft 36, and the power transmission mechanism 42 e is linked to the key 56 so as to be movable in the axial direction.

  As a result, even if the second pinch roller unit 42 moves in the axial direction of the driving rotary shaft 36, the linked state of the power transmission mechanism 42e and the driving rotary shaft 36 is ensured, and when the driving rotary shaft 36 rotates, Following this, the second lower rotating shaft 42c rotates, and the second lower pinch roller 52b rotates. In the present embodiment, the second upper rotating shaft 42b and the second lower rotating shaft 42c are not linked, and the second upper rotating shaft 42b rotates in a free state. And since the 2nd lower side pinch roller 52b and the 2nd upper side pinch roller 52a are pinched | interposed via the upper side film 11 and the lower side film 12 with predetermined pressure, it follows the rotation of the 2nd lower side pinch roller 52b. The second upper pinch roller 52a is driven to rotate.

  Further, a configuration similar to that of the first pinch roller unit 41 is disposed below the second pinch roller unit 42 and linked to the guide rod 45 and the guide rail 46. That is, the connecting plate 48 is formed below the second pinch roller unit 42. Then, it is linked to the guide rod 45 via an L-shaped plate 49 provided below the surface of the connecting plate 48 (the front side of the outer frame 33). Further, a slider 55 is provided on the back side of the connecting plate 48 (the back side of the outer frame 33), and the slider 55 is linked to the guide rail 46.

  The third pinch roller unit 43 has the same configuration as the second pinch roller unit 42. That is, the third upper rotating shaft 43b and the third lower rotating shaft 43c are disposed so as to be rotatable around the respective axes in the upper space of the box 43a disposed so as to extend in the vertical direction. A third upper pinch roller 53a and a third lower pinch roller 53b are attached to one ends of the third upper rotating shaft 43b and the third lower rotating shaft 43c, respectively. The third upper pinch roller 53a and the third lower pinch roller 53b face each other and are configured to sandwich the upper film 11 and the lower film 12 from above and below with a predetermined pressure. The third lower rotating shaft 43c is linked to the driving rotating shaft 36 via a power transmission mechanism 43e formed of a gear or the like. This power transmission mechanism 43e is also linked to a key 57 attached to the drive rotary shaft 36, and can transmit a rotational force while the power transmission mechanism 43e moves along the axial direction of the drive rotary shaft 36.

  As a result, even if the third pinch roller unit 43 moves in the axial direction of the driving rotary shaft 36, the linked state of the power transmission mechanism 43e and the driving rotary shaft 36 is ensured, and when the driving rotary shaft 36 rotates, Following this, the third lower rotation shaft 43c rotates, and the third lower pinch roller 53b rotates. And the 3rd upper side pinch roller 53a of a free state follows and rotates.

  Further, below the third pinch roller unit 43, an L-shaped plate 49 is attached to the front surface, and a connecting plate 48 is attached to the slider 55 on the rear surface. The guide rod 45 and the slider 55 are connected via the L-shaped plate 49 and the slider 55. The guide rail 46 is linked. The specific configuration is the same as that of each pinch roller unit described above.

  The fourth pinch roller unit 44 has the same configuration as the first pinch roller unit 41. That is, the fourth upper rotating shaft 44b and the fourth lower rotating shaft 44c are disposed in the box 44a positioned above so as to be rotatable around the respective axes. Then, a fourth upper pinch roller 54a and a fourth lower pinch roller 54b are attached to one ends of the fourth upper rotating shaft 44b and the fourth lower rotating shaft 44c, respectively. The fourth upper rotating shaft 44b and the fourth lower rotating shaft 44c are provided with gears 44d that mesh with each other, so that the fourth upper rotating shaft 44b and the fourth lower rotating shaft 44c can rotate synchronously. .

  Further, the fourth lower rotating shaft 44c is linked to the driving rotating shaft 36 via a power transmission mechanism 44e. The power transmission mechanism 44e has both ends of a connecting shaft 44g that are supported by bearings in a cylindrical outer case 44f arranged so as to extend in the vertical direction, and the driving rotary shaft 36 and the first lower side via bevel gears 44h, respectively. It is configured to be linked to the rotating shaft 41c. A key 58 is attached to a predetermined position on the side peripheral surface of the drive rotary shaft 36 so as to extend in the axial direction, and a bevel gear 41h linked to the drive rotary shaft 36 is provided with a key groove that matches the key 58. . As a result, the fourth upper pinch roller 54a and the fourth lower pinch roller 54b are driven to rotate in synchronization with the rotation of the driving rotary shaft 36, and the upper film 11 and the lower film 12 are moved from above and below at a predetermined pressure. Carry it in between.

  Below the fourth pinch roller unit 44, an L-shaped plate 49 is attached to the front surface and a connecting plate 48 is attached to the slider 55 on the back surface. The guide rod 45 and the slider 55 are connected via the L-shaped plate 49 and the slider 55. The guide rail 46 is linked. The specific configuration is the same as that of each pinch roller unit described above.

  The position adjustment unit 32 that moves each pinch roller unit (each pinch roller) described above is configured as follows. The adjustment shaft 62 is mounted on a bearing portion 61 that is formed in the vicinity of both ends of the bottom surface of the elongated strip-like base plate 60 that is connected so as to span between both side walls 34 of the outer frame 33. The adjustment shaft 62 is rotatably supported by the bearing 61 and is rotatable, and is also movable in the axial direction. One end 62a of the adjustment shaft 62 protrudes to the outside of the side wall 34, and a disk-like operation handle 63 is connected to the protruded one end 62a. For example, when the operation handle 63 is rotated, the adjustment shaft 62 is rotated around the axis, and the adjustment shaft 62 is moved to the axis report by pushing the operation handle 63 to the back or pulling it toward the front.

  A first sleeve 71, a second sleeve 72, a third sleeve 73, and a fourth sleeve 74 are attached to the adjustment shaft 62 in this order from the first pinch roller unit 41 side along the axial direction. Each of the sleeves 71, 72, 73, 74 is formed of a cylindrical body having both ends opened, and both ends having a small diameter are supported by the bearing portion 61. The adjustment shaft 62 is indirectly supported by the bearing portion 61 via the sleeves 71, 72, 73 and 74.

  The sleeves 71, 72, 73, and 74 are supported by bearings such that both ends of the small diameter are sandwiched by bearing portions 61 connected to the base plate 60. And each sleeve 71, 72, 73, 74 will be in the state arrange | positioned on the same straight line, and the movement of the axial direction of each sleeve 71, 72, 73, 74 is controlled. The adjustment shaft 62 passes through the sleeves 71, 72, 73 and 74 and is mounted so as to be movable in the axial direction.

  Each sleeve 71, 72, 73, 74 takes a first state that rotates integrally with the adjustment shaft 62 and a second state that idles due to the relative positional relationship in the axial direction accompanying the movement of the adjustment shaft 62, When rotating, it has a function of moving the pinch roller unit associated with the rotation. That is, each sleeve 71, 72, 73, 74 is provided with a ball plunger 64 protruding toward the inner peripheral surface. On the other hand, a plurality of coupling holes 65 provided at predetermined intervals in the circumferential direction and an endless groove 66 continuous in the circumferential direction are provided on the outer peripheral surface of the adjustment shaft 62. When the ball 64a at the tip of the ball plunger 64 enters the coupling hole 65, the first state is entered, and the sleeve can be rotated integrally with the adjustment shaft 62 (see FIG. 10A, etc.). Further, when the ball 64a at the tip of the ball plunger 64 enters the groove 66, the adjustment shaft 62 is rotated and the sleeve does not rotate (see FIG. 10B, etc.).

  Furthermore, in this embodiment, for each of the sleeves 71, 72, 73, 74, the coupling holes 65 or the grooves 66 are provided at five positions at an equal pitch in the axial direction of the adjustment shaft 62. As for the layout of the coupling holes 65 and the grooves 66 in the sleeves 71, 72, 73, 74, the coupling hole 65 is provided at the center of the five locations, and any one of the remaining four locations is provided. Is a coupling hole 65 and the other three locations are grooves 66. The position of the coupling hole 65 provided at any one of the positions is different in each of the sleeves 71, 72, 73 and 74. As a result, the adjustment shaft 62 is moved in the axial direction, and the ball plungers 64 provided on the sleeves 71, 72, 73, 74, as in the position adjustment unit 32 for the pinch roller device 16 on the downstream side in FIG. When the ball 64a at the front end engages with the central coupling hole 65 (becomes the first state), all the sleeves 71, 72, 73, 74 rotate simultaneously with the rotation of the adjustment shaft 62, and from this state, the adjustment shaft When 62 is moved in the axial direction, any one of the sleeves 71, 72, 73, 74 (for example, in the example of the figure, like the position adjustment unit 32 for the upstream pinch roller device 14 in FIG. 9). The third sleeve 73) meshes with the coupling hole 65 and enters the first state, but the other sleeve enters the groove 66 and enters the second state.

  The arrangement position of the coupling hole 65 provided at any one of the four locations is such that the first sleeve 71 is in the first state when the adjustment shaft 62 is pushed in the farthest, and the adjustment shaft 62 is moved from this state. The second sleeve 72 is in the first state when it is pulled out one position (a position pushed to the back from the center state), and the third sleeve 73 is in the first state when it is pulled out one step from the center state. Thus, the fourth sleeve 74 is in the first state when the adjustment shaft 62 is pulled out to the front.

  Further, since the sleeves 71, 72, 73, 74 and the adjustment shaft 62 are linked by fitting the ball 64a of the ball plunger 64 with the coupling hole 65 or the groove 66, the adjustment shaft 62 is used as the shaft. By strongly pushing or pulling in the direction, the ball 64 a can be temporarily removed from the coupling hole 65 or the groove 66 and enter the adjacent coupling hole 65 or groove 66. As a result, the desired sleeve is linked to any one of the coupling holes 65 or the grooves 66 installed at five locations so that the desired sleeve can be rotated in the first state, or cannot be rotated in the second state (idle). Can be.

  Male screw portions 71a, 72a, 73a, 74a are formed on the outer peripheral surfaces of the sleeves 71, 72, 73, 74, respectively. A first moving body 81 is mounted on the outer periphery of the first sleeve 71 so as to be movable in the axial direction. The first moving body 81 has a female screw portion 81a linked to the male screw portion 71a. The first moving body 81 is connected to the lower side of the back surface of the connecting plate 48 that is linked to the lower side of the first pinch roller unit 41. As a result, when the first sleeve 71 is in the first state, the first sleeve 71 rotates following the rotation of the adjusting shaft 62, so that the female screw portion 81 a that is screwed into the male screw portion 71 a of the first sleeve 71. As a result, the first moving body 81 and thus the first pinch roller unit 41 move in the axial direction of the adjustment shaft 62.

  Similarly, on the outer periphery of the second sleeve 72, a second moving body 82 having a female screw portion 82a screwed with the male screw portion 72a is mounted so as to be movable in the axial direction. The second moving body 82 is connected to the lower side of the back surface of the connecting plate 48 linked to the lower side of the second pinch roller unit 42. Accordingly, when the second sleeve 72 is in the first state, the second sleeve 72 rotates following the rotation of the adjustment shaft 62, and accordingly, the second moving body 82 and thus the second pinch roller unit 42 is moved to the adjustment shaft 62. Move in the axial direction.

  Further, on the outer periphery of the third sleeve 73 and the fourth sleeve 74, a third moving body 83 and a fourth moving body 84 having female screw portions 83a and 84a screwed with the male screw portions 72a and 73a, respectively, can move in the axial direction. Installed. The third moving body 83 and the fourth moving body 84 are connected to the third pinch roller unit 43 and the fourth pinch roller unit 44 via respective connecting plates 48. Therefore, when the third sleeve 73 is in the first state, the third sleeve 73 rotates following the rotation of the adjustment shaft 62, and accordingly, the third moving body 83, and thus the third pinch roller unit 43, When the fourth sleeve 74 is moved in the axial direction and the fourth sleeve 74 is in the first state, the fourth sleeve 74 rotates following the rotation of the adjusting shaft 62, and accordingly, the fourth moving body 84 and thus the fourth pinch roller unit 44. Moves in the axial direction of the adjustment shaft 62.

  Furthermore, in this embodiment, the direction of the external thread parts 71a and 72a provided in the first sleeve 71 and the second sleeve 72 is opposite to the direction of the external thread parts 73a and 74a provided in the third sleeve 73 and the fourth sleeve 74. . That is, for example, when the operation handle 63 and the adjustment shaft 62 are rotated, the first moving body 81 and the second moving body 82 move in the same direction, but the third moving body 83 and the fourth moving body 84 move in opposite directions. Moving. Therefore, when the position of the adjustment shaft 62 in the axial direction is adjusted and all the sleeves 71, 72, 73, 74 are in the first state, when the adjustment shaft 62 is rotated forward, the first moving body 81 and the second moving body 82. , The third moving body 83 and the fourth moving body 84 both move in the direction away from the center (outside in the direction intersecting the film transport direction), and reversely rotate the adjustment shaft 62, the first moving body 81, The second moving body 82, the third moving body 83, and the fourth moving body 84 all move in the direction approaching the center (center side in the direction intersecting the film conveyance direction). Therefore, the center reference alignment can be performed collectively.

  Further, the screw pitch of the screw part for moving in the same direction is the outside (the male screw part 71a of the first sleeve 71 and the female screw part 81a of the first moving body 81 and the male screw part 74a of the fourth sleeve 74 and the fourth moving body. The female thread portion 84a) of 84 is preferably enlarged. In this way, the movement distance in the axial direction of the first moving body 81 and the fourth moving body 84 when the adjustment shaft 62 is rotated once is the movement in the axial direction of the second moving body 82 and the third moving body 83. It can be longer than the distance.

  As described above, in the present embodiment, by adjusting the position of the adjustment shaft 62, only one of the sleeves can be brought into the first state and can be rotated independently with the rotation of the adjustment shaft 62. Therefore, the pinch roller unit linked to the sleeve in the first state is moved independently (while the other pinch roller units are stopped), and the direction intersecting the film transport direction of the pinch roller (film width direction) Can be finely adjusted.

  Furthermore, in this embodiment, the indicator 85 is provided coaxially with the adjustment shaft 62. Four indicators 85 are provided corresponding to the sleeves 71, 72, 73 and 74. Each indicator 85 is configured such that, for example, the meter is up / down in accordance with the rotation of the associated sleeve. Further, the memory unit 85a of the indicator 85 is visible from the outside of the apparatus (for example, the outside provided with the operation handle 63). The user confirms the position of each pinch roller based on the value displayed in the memory unit 85a of the indicator 85 and sets it to a desired position.

  Further, in the present embodiment, a position memory 87 is provided on one end side of the adjustment shaft 62. This position memory 87 is for indicating the position of the adjustment shaft 62 in the axial direction. In this embodiment, four endless grooves extending in the circumferential direction are provided in the axial direction. These four grooves correspond to the arrangement pitch of the coupling holes 65 and the grooves 66 provided in the adjustment shaft 62. When the adjustment shaft 62 is pushed in the farthest, the ball 64 a of the ball plunger 64 is linked to the coupling hole 65 or the groove 66 on the foremost side (right side in FIGS. 8 and 9) in the axial direction of the adjustment shaft 62. When the adjustment shaft 62 is pulled out step by step from there, the groove of the position memory 87 is positioned at the surface position of the side wall 34 at a position where the ball 64 a of the ball plunger 64 is linked to the coupling hole 65 or the groove 66. Therefore, it is easy to know which position the ball plunger 64 is and which sleeve is in the first state depending on how many grooves are present in the table. Further, in the present embodiment, four shafts are provided, and the state in which the adjustment shaft 62 is pushed in the farthest is associated with the state in which the ball 64 a of the ball plunger 64 is linked to the coupling hole 65 or the groove 66 on the foremost side. However, the position memory 87 is composed of five grooves, and the state in which the adjustment shaft 62 is pushed into the innermost position is the state in which the ball 64 a of the ball plunger 64 is linked to the coupling hole 65 or groove 66 on the foremost side. Alternatively, the foremost groove may be positioned on the surface of the side wall 34.

  In the above-described embodiment, the switching between the first state and the second state is performed by linking the ball plunger 64 and the coupling hole 65 or the groove 66. However, the present invention is not limited to this, for example, other plungers Or other than a plunger, for example, a pen cylinder or the like may be used. The pen cylinder has a protruding portion at the tip of the rod that is driven by electricity and the like, so that when the adjustment shaft 62 is moved in the axial direction, the tip is shifted to a state where it is taken out from the coupling hole 65 or groove 66 It becomes possible to move easily, and if it comes out of the coupling hole 65 or the groove 66, it can be inserted into the adjacent coupling hole 65 or the groove 66 by protruding the tip at an appropriate timing.

  In the above-described embodiment, both the upstream pinch roller device 14 and the downstream pinch roller device 16 link the position adjustment unit 32 and can adjust the position of each pinch roller. It is not restricted to this, You may install in only one side. In addition, the machine element that is subject to position adjustment is not limited to the pinch roller. For example, a center sealer, a side guide, etc., for example, a width direction that intersects the conveyance direction in a packaging machine for a product that flows in multiple rows It is good to apply to something that moves multiple elements.

  As described above, various aspects of the present invention have been described using the embodiments and the modifications. However, these embodiments and descriptions are not intended to limit the scope of the present invention, and are for understanding the present invention. It is added that it was provided to contribute. The scope of the present invention is not limited to the configurations and manufacturing methods explicitly described in the specification, and includes combinations of various aspects of the present invention disclosed in the present specification. Among the present inventions, the configuration for which a patent is sought is specified in the appended claims, but the present invention is disclosed in this specification even if the configuration is not specified in the claims. I would like to remind you that there is a possibility of claiming this configuration in the future.

DESCRIPTION OF SYMBOLS 10 Four-side seal packaging machine 11 Upper film 12 Lower film 14 Pinch roller device 15 Side seal device 16 Pinch roller device 17 Side cutter device 19 End seal device 20 End cutter device 21 Carry-out conveyor device 27 Packaging 30 Pinch roller 32 Position adjustment unit 41 First Pinch Roller Unit 42 Second Pinch Roller Unit 43 Third Pinch Roller Unit 44 Fourth Pinch Roller Unit 45 Guide Rod 46 Guide Rail 48 Connection Plate 51a First Upper Pinch Roller 51b First Lower Pinch Roller 52a Second Upper Pinch Pinch roller 52b Second lower pinch roller 53a Third upper pinch roller 53b Third lower pinch roller 54a Fourth upper pinch roller 54b Fourth lower pinch roller 55 Eider 60 Base plate 61 Bearing portion 62 Adjustment shaft 63 Operation handle 64 Ball plunger 64a Ball 65 Connecting hole 66 Groove 71 First sleeve 71a Male thread portion 72 Second sleeve 72a Male thread portion 73 Third sleeve 73a Male thread portion 74 Fourth sleeve 74a Male screw Part 81 first moving body 81a female threaded part 82 second moving body 82a female threaded part 83 third moving body 83a female threaded part 84 fourth moving body 84a female threaded part 87 position memory

Claims (5)

A position adjustment unit that performs position adjustment in the arrangement direction of a plurality of machine elements arranged at intervals,
An adjustment shaft arranged to extend in the arrangement direction of the plurality of machine elements;
A plurality of sleeves attached to the adjustment shaft along the axial direction;
A movement mechanism linked to each of the plurality of sleeves and moving along the axial direction of the adjustment shaft as the linked sleeves rotate.
The adjustment shaft is arranged to be rotatable around the axis and movable in the axial direction;
The adjustment shaft is attached to the plurality of sleeves so as to be movable in the axial direction, and each of the plurality of sleeves is connected to the adjustment shaft according to a relative position in the axial direction accompanying the movement of the adjustment shaft. Take the first state of rotating together and the second state of spinning,
Depending on the axial movement position of the adjustment shaft, the sleeve in the first state is different, and at least one of the plurality of sleeves is in the first state,
A position adjustment unit configured to move the machine element in the arrangement direction by the moving mechanism. The outer peripheral surface of the sleeve has a male thread portion,
The moving mechanism includes a moving body having a female screw portion that meshes with the male screw portion,
The position adjustment unit according to claim 1, wherein the mechanical element linked to the moving body is moved in the same direction as the moving body is moved in the axial direction. The sleeve has a protrusion protruding inside,
On the outer peripheral surface of the adjusting shaft facing the inner peripheral surface of the sleeve, there is a continuous groove in the circumferential direction, and a recess provided adjacent to the endless groove,
When the protrusion enters the endless groove, the second state is obtained.
3. The position adjustment unit according to claim 1, wherein the position adjustment unit is configured to be in the first state when the protrusion enters the recess.   The position adjustment unit according to claim 3, wherein the protrusion is configured such that a protrusion amount with respect to the inside is displaceable.   The position adjustment unit according to any one of claims 1 to 4, wherein the mechanical element is at least one of a pinch roller, a bar sealer, and a side guide used in a packaging machine.

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