JP4187589B2 - Rotary cutter for automatic packaging machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention belongs to the technical field of automatic packaging machines, and specifically relates to a rotary cutter device suitable for use in an automatic packaging machine such as a rotary automatic packaging machine.
[0002]
[Prior art]
Conventionally, there is a rotary automatic packaging machine described in Patent Document 1, for example. Moreover, regarding the rotary cutter device for automatic packaging machines, for example, there is one described in Patent Document 2.
[0003]
[Patent Document 1]
JP 2000-355303 A [Patent Document 2]
JP 2000-219217 A [0004]
This type of automatic rotary packaging machine
(1) Fold a long wrapping film along the longitudinal direction, and feed the wrapping film in the lateral direction, while feeding the wrapping film to the wrapping film so that the wrapping film is substantially perpendicular to the wrapping film at a certain interval. Forming a bag part, and a filling device for filling each bag part with a certain amount of filling material,
(2) a sealing device that laterally seals the upper opening of each bag portion;
(3) A rotary cutter device that cuts a longitudinal intermediate portion of the vertical seal portion is provided.
(4) Between the sealing device and the cutter device, suspend and hold the vicinity of the lateral seal portion of the continuum of the packaged product from above, and also from the upper side of the lateral seal portion of the packaged product one by one by the cutter device. Some have a holding means for suspending and holding and transferring to a predetermined position.
[0005]
And as for the said rotary cutter apparatus, as shown in FIG. 9 which clarified the structure of patent document 2,
(5) A pair of left and right rotary cutters A, B provided with a cutter-receiving blade AK and a cutter upper blade BK for cutting the vertical seal portion on the peripheral surface;
(6) a pair of left and right rotating shafts AT and BT to which the pair of left and right rotating cutters A and B are fixed;
(7) The automatic packaging machine between the cutter receiving blade AK and the cutter upper blade BK by rotating the pair of rotary shafts AT and BT in a relative direction as shown in FIG. Is provided with a drive mechanism (not shown) for cutting 52 ′ and separating the intermediate portion of the seal portion 52 (specifically, the vertical seal portion) of each packaged product 65... .
[0006]
[Problems to be solved by the invention]
However, in the conventional rotary cutter device, the blade surfaces of the cutter-receiving blade AK and the cutter upper blade BK are linearly formed as shown in FIGS. 9 (A) and 9 (C). The receiving blade AK and the cutter upper blade BK are provided in parallel to the axes of the rotation axes AT and BT. Therefore, when the vertical seal 52 of the packaged product 65 is cut 52 ', the cutter receiving blade AK and the cutter upper blade BK are cut 52' by surface contact or line contact. There is a problem that a residue is generated, and there is also a problem that it is difficult to adjust for accurately contacting the cutting edges of both the blades.
[0007]
Therefore, as shown in FIG. 9 (a), the cutter receiving blade AK is provided so as to be tilted, for example, 3 ° counterclockwise with respect to the rotation axis AT, while the cutter upper blade BK is opposite to the rotation axis BT. It has been considered to solve the above-mentioned problem by providing an inclination of 3 ° clockwise, for example.
[0008]
Thus, when the cutter receiving blade AK and the cutter upper blade BK are tilted in the opposite directions, the contact form of each other becomes a substantially point state, and the contact point moves while being pressed from end to end of the vertical seal portion. An action can be formed. For this reason, it is possible to prevent the occurrence of uncut portions due to the imbalance of the cutting pressure, compared to the cutting operation in a line contact state when the cutter-receiving blade AK and the cutter upper blade BK are not tilted.
[0009]
However, in the conventional rotary cutter device shown in Patent Document 2 and FIG. 9, the blade surfaces of the cutter-receiving blade AK and the cutter upper blade BK are shown in FIGS. Therefore, when the cutter-receiving blade AK and the cutter upper blade BK are tilted in opposite directions, the axial radius distance of the cutting surfaces of the linear cutter-receiving blade AK and the cutter upper blade BK is reduced. From the central part, it becomes slightly longer as it goes to both ends.
[0010]
Therefore, when the sealing portion 52 of the packaged product 65 is cut using the rotary cutter device configured as shown in FIG. 9 and FIG. 1 of Patent Document 2 and FIG. 3, both end portions of the sealing portion 52 can be sufficiently cut. However, there was a problem that it was left uncut as it went to the center.
[0011]
Further, in the rotary automatic packaging machine described in Patent Document 1, both the cutter receiving blade AK and the cutter upper blade BK are integrated with the rotary shafts AT and BT as shown in FIG. When changing the surface configuration (convex curved surface shape), etc., or adjusting the mounting state of the cutter-receiving blade AK according to the degree of wear of the cutter upper blade BK, the entire rotary cutters A, B can be replaced, Since it is necessary to adjust the mounting state of the rotary shaft AT of the rotary cutter A provided with the cutter receiving blade AK, there is a problem that the work becomes complicated and the frequency of parts replacement increases and the maintenance cost increases. there were.
[0012]
The present invention has been made in order to solve the above-described problems, and the object thereof is continuous between the cutter-receiving blade and the cutter upper blade of a pair of left and right rotating cutters that perform relative rotation. When the packaged product to be cut is cut at the seal portion and separated, the seal portion is not left uncut by the cutter upper blade and the cutter receiving blade.
[0013]
Still another object of the present invention is to provide a rotary cutter device that can reduce the maintenance cost by reducing the frequency of parts replacement of the rotary cutter.
[0014]
[Means for Solving the Problems]
(1) In order to achieve the above object, the rotary cutter device for an automatic packaging machine according to the present invention is continuous along the longitudinal direction by the automatic packaging machine as described in the first aspect, and is at a constant interval. By inserting the continuum of the packaged product that is seal-molded and sent out in a state partitioned by the seal portion between the pair of left and right rotary cutters that perform relative rotation on the conveyance path of the continuum The cutter upper blade and the cutter receiving blade provided on the peripheral surface of each cutter are rotary cutter devices for an automatic packaging machine configured to cut a continuum of packaged goods at the seal portion, The upper cutter blade and the cutter blade of the rotary cutter are provided on the rotary shaft of each rotary cutter so as to be inclined in opposite directions. One side It is characterized in that it is formed in a convex curved surface shape in which the center portion of the blade surface is swollen with respect to both ends of the blade surface so that the axial radius distance when viewed from the axial direction between the end and the other end is equal.
[0015]
(2) Further, in the present invention, as described in the second aspect of the present invention, it is continuously formed along the longitudinal direction by the automatic packaging machine and is sent out after being molded in a state of being partitioned by a seal portion at a constant interval. By inserting the continuous body of packaged goods between a pair of left and right rotary cutters that rotate relative to each other on the conveyance path of the continuous body, the cutter upper blade and the cutter receiving blade provided on the peripheral surface of each cutter A rotary cutter device for an automatic packaging machine configured to cut a continuum of packaged goods at the seal portion, wherein the upper cutter and the cutter receiving blade of each rotary cutter are rotated by each rotary cutter. Inclined in opposite directions with respect to the shaft, the blade surface of the cutter upper blade is formed linearly, and the blade surface of the cutter receiving blade is between one end and the other end of the cutter upper blade. axis It is characterized in that it is formed in a convex curved surface shape in which the center portion of the blade surface is swollen with respect to both ends of the blade surface so as to absorb the fluctuation of the axial radius distance when viewed from the direction.
[0016]
(3) Moreover, in this invention, when the inclination with respect to the rotating shaft of a cutter upper blade and a cutter receiving blade is 3 degrees as described in the said Claim 3, with respect to each blade surface both ends of a cutter upper blade and a cutter receiving blade convex surface value representing the inflation of the blade surface central portion, is characterized that you have been configured to 70 [mu] m.
[0017]
(4) Moreover, in this invention, when the inclination with respect to the rotating shaft of a cutter upper blade and a cutter receiving blade is 3 degrees, and the blade surface of a cutter upper blade is formed linearly as described in the said Claim 4. , convex curved value representing the inflation of the rake face central portion with respect to the rake face at both ends of the cutter receiving blade has features that you have been configured to 130 .mu.m.
[0018]
(5) Further, according to the present invention, as described in the fifth aspect of the present invention, at least the cutter receiving blade of the cutter receiving blade and the cutter upper blade can be detached from the shaft body of the rotary cutter and the mounting state can be adjusted. It is characterized by that.
[0019]
According to the means described in the above (1) and (3), since the blade surfaces of the cutter receiving blade and the cutter upper blade are formed in a convex curved shape in which the central portion of the blade surface is inflated, both rotary cutters are placed in relative directions. When cutting the seal part of the packaged product, the contact degree of the point contact between the cutter receiving blade and the cutter upper blade becomes constant, which can solve the problem of the uncut portion of the central part in the seal part and the cutter. It is possible to improve the stability of the cutting operation by the receiving blade and the cutter upper blade.
[0020]
According to the means described in the above (2) and (4), the cutter upper blade is formed as a straight blade, the center portion of the cutter receiving blade is formed into a convex curved shape, and the degree of swelling is as described above ( Since it has a convex curved surface shape that is larger than those described in 1) and (3), it is possible to solve the uncut problem in the rotary cutter device without incurring costs and to improve the stability of the cutting operation. To do.
[0021]
According to the means described in the above (5), it is possible to exclude a complicated and expensive work of detaching and replacing the entire cutter receiving blade, that is, the entire rotating cutter including the rotating shaft. Further, since the mounting state of the cutter receiving blade can be adjusted according to the degree of wear of the cutter upper blade, the frequency of parts replacement can be reduced to reduce the maintenance cost.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a rotary cutter device for an automatic packaging machine according to the present invention will be described below with reference to the drawings. FIG. 1 illustrates the configuration of a rotary automatic packaging machine embodying the present invention. In FIG. 1, reference numeral 1 denotes a part of the rotary automatic packaging machine. Reference numerals 2 and 3 are original fabrics in which film-shaped packaging materials 2F and 3F are wound up in a roll shape, the left original fabric 2 is in use, and the right original fabric 3 is a spare.
[0023]
When the packaging material 2F of the original fabric 2 in use is almost gone on the upper portions of the original fabrics 2 and 3, an automatic joining device for joining the starting end piece of the spare original packaging material 3F to the end piece 4 is provided on the side surface of the fuselage 6.
[0024]
The packaging material 2F (or packaging material 3F) that has passed through the automatic tethering device 4 is pulled upward and guided to the bag-making chute 5 arranged in the horizontal direction. As shown in FIG. 6, the bag making chute 5 folds the wrapping material 2F and the like in the longitudinal direction with the fold line 51 facing downward, and sends the fold line 51 in a substantially horizontal direction.
[0025]
A hopper 7 for storing a filling material is installed on the upper part of the machine body 6. Below the hopper 7, a fixed-quantity supply device 8 having a disk shape in plan view for supplying the filling material supplied from the hopper 7 to the quantitative container 9 is pivotally supported so as to be horizontally rotatable.
[0026]
In the lower part of the fixed quantity container 9, as shown in FIG. 7, the packaging material 2F is vertically sealed with a predetermined interval D so as to be substantially perpendicular to the fold 51 formed on the lower side of the packaging material 2F by the bag-making chute 5. A plurality of vertical sealing means (not shown) are formed along the circumference of the quantitative supply device 8 to form the portion 52 to form a bag portion.
[0027]
In addition, a filling chute 10 that fills each of the continuous bag portions with a filling material is disposed below the metering container 9 so as to be movable up and down. In addition, the fixed quantity container 9 and the filling chute 10 are provided along the circumference of the fixed quantity supply device 8 together with the vertical sealing means.
[0028]
Reference numeral 61 denotes a horizontal sealing device that seals the upper opening of the continuous bag portion, and is mainly composed of a heat seal roller 62 and a drive motor 63 that rotates the heat seal roller 62 horizontally. After the horizontal sealing 64 is performed by the horizontal sealing device 61, a continuous body 101 (a continuous body 101 of packaged products 65 in which bag portions are connected and filled with the filling material C) as shown in FIG. 8 is obtained.
[0029]
In some cases, a cutter for forming an opening notch (notch) in the horizontal seal portion 64 of the package 65 may be provided on the downstream side of the horizontal seal device 61. Moreover, the continuous body 101 discharged | emitted from the rotary type automatic packaging machine 1 may be once stored in the state folded in the cardboard box etc. as it is.
[0030]
FIG. 2 generally shows a cutting machine unit 31 including a rotary cutter device 40 according to the present invention that can cut and separate the central portion of the vertical seal portion 52 of the discharged continuous body 101. .
[0031]
The cutting machine unit 31 includes four (two in the figure) caster adjusters 32 that can be installed and moved with respect to the floor and can be adjusted in height. By adjusting the caster adjuster 32, the height of the cutting machine unit 31 and the inclination with respect to the floor surface can be freely adjusted.
[0032]
A rotary cutter device 40 according to the present invention is provided at the center of the cutting machine unit 31 for cutting the vertical seal portion 52 of the continuous body 101 in which the packaged products 65 are connected. The packaged products 65 separated one by one or in a state of being connected in series are configured to fall through the shooter 14.
[0033]
Reference numeral 13T holds the vicinity of the lateral seal portion 64 of the continuum 101 suspended from above, and also holds the vicinity of the edge seal portion of the packaged product 65 made one by one by the rotary cutter device 40 while hanging from above. , Holding means for transferring to a predetermined position. The holding means 13T and the cutting machine unit 31 are driven by a drive motor (not shown) provided in the box 15. Further, the cutting machine unit 31 having such a configuration is independent of the rotary automatic packaging machine 1, but can be connected to the machine body 6 or removed therefrom.
[0034]
FIG. 3 shows the configuration of the rotary cutter device 40 according to the present invention. In FIG. 3, 41 is an attachment frame provided in the cutting machine unit 31, 43 and 44 are left and right rotary cutters, 43T, Reference numeral 44T denotes left and right rotary shafts to which the rotary cutters 43 and 44 are attached. The upper and lower ends of the rotary shafts 43T and 44T are rotatably supported on the mounting frame 41 side through bearings.
[0035]
Reference numeral 70 denotes a transmission shaft attached to the attachment frame 41, 71 denotes a transmission gear for transmitting the rotation of a drive mechanism (not shown) such as a motor to the transmission shaft 70, and 72 denotes one rotation of the rotation of the transmission shaft 70 via the operation gear 73. The drive gears 74 and 75 which transmit to the shaft 43T are interlocking gears which are attached to the rotary shafts 43T and 44T and mesh with each other. By the meshing of these interlocking gears 74 and 75, one of the rotary shafts 43T is shown in FIG. As shown in FIG. 5 (b), when rotating in the left direction, the other rotating shaft 44T is rotated in the right direction.
[0036]
Further, in the figure, 42 is a mounting plate provided in the cutting machine unit 31, 80 and 80 are screw shafts provided above and below the mounting plate 42, and 81 and 81 advance and retract the upper and lower screw shafts 80 and 80. Adjustment levers 82 and 82 are compression springs attached to the tip portions of the upper and lower screw shafts 80 and 80, and 83, 83 and 84 and 84 are bearing cases for rotatably supporting the upper and lower ends of the left and right rotating shafts 43T and 44T. The left and right rotating shafts 43T, 44T are maintained in the juxtaposed state by the compression action of the compression springs 82, 82 based on the operation of the upper and lower adjusting levers 81, 81, and the juxtaposition interval is adjusted to be freely adjustable. The
[0037]
Further, in the drawing, 45X... And 46X... Indicate cutter receiving blades and cutter upper blades that are respectively attached to the outer periphery of the pair of left and right rotating cutters 43 and 44 at 90 degree intervals. 43A ... and 44A ... are mounting bases that project from the outer circumference of each of the rotary cutters 43, 44 at intervals of 90 degrees. Each of the cutter receiving blades 45X ... and the cutter upper blade 46X ... The blades 43A, 44A, etc. are attached to the bases 43A, 44A, etc. so that they can be exchanged and the attachment state can be adjusted using mounting screws 43B, 44B, etc. with the blade surfaces facing outward.
[0038]
As described above, the cutter blades 45X and the cutter upper blades 46X attached to the outer peripheries of the rotary cutters 43 and 44 are as shown in FIGS. 4 (a) and 5 (a). The rotary cutter 43 is attached to the central axis of the rotary cutter 43 so as to be inclined by 3 ° in the rotational direction, that is, in the case of the drawing in the counterclockwise direction. It is attached in a state where it is inclined by 3 ° with respect to the central axis in the rotation direction, that is, in the case of the drawing, clockwise.
[0039]
FIG. 4 clearly shows the main part of the configuration described in claims 1 and 3, wherein (A) is a front view thereof, (B) is a plan sectional view, and (C) is a cutter receiving blade 45X. The block diagram of the cutter upper blade 46X is shown. In (C), 45A and 46A are attachment holes provided in the cutter receiving blade 45X and the cutter upper blade 46X.
[0040]
In the configuration according to claim 1 and 3, each blade surface of the cutter receiving blade 45X and the cutter upper blade 46X has an equal axial radius distance when viewed from the axis between one end and the other end of each blade. In the case where the center of the blade surface is inflated with respect to both ends of the blade surface (from one end to the other), the inclination angle of each cutter receiving blade 45X and cutter upper blade 46X is 3 ° The convex curve value representing the degree of swelling of the central portion of the blade surface with respect to both edge surfaces of the cutter upper blade and the cutter receiving blade is 70 μm, and the drawing shows the shape of the convex curved surface somewhat exaggerated.
[0041]
FIG. 5 clearly shows the main part of the configuration described in claims 2 and 4, wherein (A) is a front view thereof, (B) is a plan sectional view thereof, and (C) is a cutter receiving blade 45Y. And 45A, 46A shown in (c) is a mounting hole for each blade.
[0042]
In the structure of Claim 2 and 4, the blade surface of the cutter upper blade 46Y is formed in a linear blade, and the blade surface of the cutter receiving blade 45Y is from the convex curved surface of the said FIG. 4 (Claims 1 and 3). Also, a convex curved surface configuration having a shape in which the degree of swelling of the central portion of the blade surface with respect to both ends of the blade surface is increased, that is, an axial radius when viewed from the axial direction between one end and the other end of the cutter upper blade 46Y which is a straight blade. It is formed in a convex curved surface configuration that absorbs the variation in distance. Specifically, each blade 45Y, if inclined facing 46Y is 3 °, the specific convex surface values of the cutter receiving blade 45Y is a 130 .mu.m, drawings described somewhat exaggerated shape of the convex surface is doing.
[0043]
Since automatic packaging machine rotary cutter device according to the present invention are mentioned such a structure above, inflated than blade surface both parts of the blade surface central portion of the cutter receiving blade 45X and the cutter on the blade 46X, as shown in FIG. 4 or configure the convex surface (convex surface value 70 [mu] m) was, or form a straight blade cutter upper blade 46Y as shown in FIG. 5, than the blade surface central portion of the cutter receiving blade 45Y of FIG 4 By constructing the convex curved surface with a large degree of swelling (convex curved surface value 130 μm) , it is possible to solve the problem of the uncut portion of the seal portion 52 in the rotary cutter and to improve the stability of the cutting operation.
[0044]
In addition, since the cutter blade 45X or 45Y is configured to be detachable from the rotary cutter 43 and the mounting state can be adjusted, the cutter blades 45X and 45Y can be replaced or the cutter upper blade 46X or 46Y can be worn. It is possible to easily adjust the mounting state.
[0045]
The drawing shows a configuration in which a pair of left and right rotary cutters 43 and 44 are used in a state where they are arranged side by side, but there are cases where these two rotary cutters 43 and 44 are used side by side. The selection is arbitrary.
[0046]
【The invention's effect】
As described above, according to the rotary cutter device for an automatic packaging machine according to the present invention, the problem of the uncut portion of the seal portion in the rotary cutter can be solved, and the varieties and properties of the packaging film to be used, etc. Without being affected by the automatic packaging machine, the package that has been continuously sealed with the automatic packaging machine can be surely separated to improve the stability of cutting and speed up the automatic packaging. The present invention is capable of exhibiting an economic effect that can reduce maintenance costs, and is suitable for various types of automatic packaging machines including the rotary type automatic packaging machine shown in the drawing.
[Brief description of the drawings]
FIG. 1 is a side view illustrating the configuration of a rotary automatic packaging machine that implements a rotary cutter device according to the present invention.
FIG. 2 is a side view illustrating a configuration of a cutting machine unit including a rotary cutter device according to the present invention.
FIG. 3 is a configuration diagram illustrating a main part of the present invention.
FIGS. 4A and 4B illustrate the configuration of the present invention described in claims 1 and 3, wherein (A) is a front view, (B) is a partial cross-sectional plan view, and (C) is a cutter receiving blade and cutter. The block diagram of an upper blade.
FIGS. 5A and 5B illustrate the configuration of the present invention as set forth in claims 2 and 4, wherein FIG. 5A is a front view, FIG. 5B is a partially sectional plan view, and FIG. 5C is a cutter receiving blade and cutter. The block diagram of an upper blade.
FIG. 6 is an explanatory view showing a state in which the packaging material is folded in two along the longitudinal direction with the fold line down.
FIG. 7 is an explanatory view showing a state in which a vertical seal portion is formed at a predetermined interval in the packaging material so as to be substantially orthogonal to a fold formed on the lower side of the packaging material by the bag-making chute 5;
FIG. 8 is an explanatory diagram showing a continuum.
9A and 9B illustrate the configuration of a conventional rotary cutter device, where FIG. 9A is a front view, FIG. 9B is a partial cross-sectional plan view, and FIG. 9C is a configuration of a cutter receiving blade and a cutter upper blade. Figure.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rotary type automatic packaging machine 2F Packaging material 40 Rotary cutter device 43, 44 Rotary cutter 43A, 44A Mounting base 43B, 45B Mounting screw 43T, 44T Rotating shaft 45X, 45Y Cutter receiving blade 46X, 46Y Cutter upper blade 52 Vertical seal Part 65 Packaged products 101 Continuous packaged products

Claims (5)

A continuum of packaged articles that are continuously formed along the longitudinal direction by an automatic packaging machine and are sent out by being molded in a state defined by seal portions at regular intervals are relatively placed on the conveying path of the continuum. So that the cutter upper blade and the cutter receiving blade provided on the peripheral surface of each cutter cut the continuum of the packaged product at the seal portion. A rotary cutter device for an automatic packaging machine configured,
The cutter upper blade and the cutter receiving blade of each of the rotary cutters are provided so as to be inclined in directions opposite to each other with respect to the rotation axis of each rotary cutter, and the blade surfaces of these cutter upper blade and cutter receiving blade are respectively It is characterized in that it is formed in a convex curved shape in which the center part of the blade surface is swollen with respect to both ends of the blade surface so that the axial radius distance when viewed from the axial direction between one end and the other end of the blade surface is equal. Rotary cutter device for automatic packaging machines. A continuum of packaged articles that are continuously formed along the longitudinal direction by an automatic packaging machine and are sent out by being molded in a state defined by seal portions at regular intervals are relatively placed on the conveying path of the continuum. So that the cutter upper blade and the cutter receiving blade provided on the peripheral surface of each cutter cut the continuum of the packaged product at the seal portion. A rotary cutter device for an automatic packaging machine configured,
A cutter on the blade and the cutter receiving blade of said rotary cutter, and against the rotary shaft provided with inclined respectively opposite direction around the rotary cutter, and linearly formed blade face of the cutter on the blade, said the blade surface of the cutter receiving blade, so that it can absorb the variation in the axial radial distance when viewed from the axial direction between the one end of the cutter on the blade to the other, the blade surface central portion with respect to the rake face at both ends A rotary cutter device for an automatic packaging machine, which is formed into an inflated convex curved surface shape. When the 3 ° inclination with respect to the rotation axis of the upper blade and the cutter receiving blade cutter, convex curved value representing the inflation of the rake face central portion of each rake face at both ends of the cutter on the blade and the cutter receiving blade is configured to 70μm which do automatic packaging machine rotary cutter according to claim 1, characterized in Rukoto. When the inclination of the cutter upper blade and the cutter receiving blade with respect to the rotation axis is 3 ° and the blade surface of the cutter upper blade is formed in a straight line, the degree of swelling of the center of the blade surface with respect to both ends of the cutter receiving blade convex surface value represented by an automatic packaging machine for a rotary cutter according to claim 2, characterized that you have been configured to 130 .mu.m.   5. The structure according to claim 1, wherein at least one of the cutter blade and the cutter upper blade is configured such that the cutter blade can be removed from the shaft body of the rotary cutter and the attachment state can be adjusted. Rotary cutter device for automatic packaging machines.

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