JP3767934B2 - Packaging machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a packaging processing machine for processing a continuously sent packaging material.
[0002]
[Prior art]
2. Description of the Related Art A packaging machine is known that continuously rolls a surface of a packaging material by rotating a processing roll provided on the traveling path while traveling the packaging material in a certain direction (for example, Japanese Utility Model Publication No. 63-147451).
[0003]
[Problems to be solved by the invention]
In the conventional packaging processing machine, since processing means such as sand paper is provided on the entire circumference of the processing roll, the packaging material cannot be partially processed repeatedly at an appropriate pitch. In order to meet such a demand, it is necessary to stop the packaging material every time it is conveyed by a predetermined pitch and to perform processing in synchronization with the stop. Therefore, the packaging material cannot be continuously run and cannot be processed at high speed.
[0004]
An object of this invention is to provide the packaging processing machine which can process continuously the packaging material which drive | works continuously with a desired pitch, without replacing | exchanging a processing roll.
[0005]
[Means for Solving the Problems]
The present invention will be described with reference numerals in FIGS. 1 to 8 showing one embodiment of the present invention in parentheses. However, the present invention is not limited to the illustrated embodiment.
[0006]
In invention of Claim 1, it has the traveling means (2) which travels a packaging material (1) along a predetermined | prescribed traveling path | route, and the process roll (3) provided so that an outer peripheral surface might oppose a traveling path | route. In the packaging processing machine that processes the packaging material by rotating the processing roll while traveling the packaging material along the traveling path, the plurality of alignment indexes (1a) provided side by side in the traveling direction of the packaging material are The dimension between the index detection means (50) for detecting at a specific position in the travel route, the plurality of alignment indices (1a), and the machining position to be machined in association with each alignment index (1a). Setting means (51) for setting, travel amount detection means (22) for detecting information related to the travel amount of the packaging material, and the plurality of processing positions at a predetermined pitch in the travel direction of the packaging material Line up, front Based on the information detected by the index detection means (50), the set value set by the setting means (51), and the information detected by the travel amount detection means (22), the rotational movement of the processing roll Rotation control means (52) for controlling the speed, and speed control means (52) for controlling the rotation speed of the work roll so that the relative speed at the contact position between the work roll and the packaging material becomes a predetermined value. Forming a protrusion (32) that is an abrasive grain surface on the outer peripheral surface of the processing roll, and bending the top portion (32a) of the protrusion along the circumferential direction of the processing roll; In addition, inclined portions (32b) that gradually recede toward the radial center of the processing roll as they move away from the top portion in the circumferential direction are provided on both sides in the circumferential direction of the protrusion , and the speed control means Low When the protrusions of the contacts with the packaging material, wherein the relative velocity controls the rotation so that the zero elastically pressed toward the work roll in the packaging material, the work roll The protrusions, which are the abrasive grain surfaces, were brought into contact with the packaging material, and the inclined portions gradually changed the degree of processing of the packaging material. According to this invention, while detecting the alignment index of the packaging material by the index detection means, the travel amount that the packaging material travels is detected by the travel amount detection means, and the position of the packaging material is determined based on the result, The rotation operation of the processing roll can be controlled so that the processing portion (33a) of the processing roll is in contact with the packaging material in accordance with the timing of the position separated by an amount corresponding to the setting value by the setting means. Thereby, the rough surface processing can be continuously performed at a desired pitch with reference to a desired location on the packaging material. In addition, since the top portion of the protrusion can be brought into contact with the packaging material intermittently and with a certain spread according to the rotation of the processing roll, it is possible to perform partial roughening that requires such contact. Furthermore, the degree of processing of the packaging material can be gradually changed using the inclined portion.
[0008]
In addition, by packaging processing machine, the relative velocity at the contact position between the work roll and the packaging material is provided with a speed control means (52) for controlling the rotational speed of the work rolls so as to zero a predetermined speed, packaging A desired portion of the material can be processed at a predetermined speed.
[0011]
As a related art, the outer peripheral surface the cutting edge (36a, 37a) of the work roll of the packaging machine if are provided to form a cut in the desired pitch to the packaging material.
[0012]
Further, as a related art, in the packaging machine, by at intervals cutting a (36a) in the axial direction of the work roll providing a plurality, a plurality of cuts along a direction perpendicular to the running direction packaging material Can be formed.
[0013]
Further, as a related technique, the packaging in the processing machine, the width of the cutting edge (37a) in the axial direction of the work roll, is set larger than the axial width of the packaging material, cutting the packaging material at a desired pitch it can.
[0014]
In addition, as a related technique, if a conical protrusion (35) is provided on the outer peripheral surface of a processing roll in a packaging machine, circular or polygonal holes can be formed at a desired pitch in the packaging material.
[0015]
Further, as a related art, in the packaging machine, if being provided with a heating unit (38, 39) on the outer peripheral surface of the work roll, it is possible to heat the packaging material at a desired pitch.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows an outline of a packaging machine according to this embodiment. The packaging processing machine includes a traveling mechanism 2 that travels the film 1 as a packaging material in the direction of arrow F, a processing roll 3 that is disposed on the traveling path of the film 1, a drive mechanism 4 that rotationally drives the processing roll 3, And a control mechanism 5 that controls the drive mechanism 4.
[0019]
The film 1 is made of plastic or the like, and is processed, for example, as shown in FIG. In this example, a plurality of registration marks 1a are printed at a constant interval A in the traveling direction (the direction of arrow F), and the roughened surface portion 1b is formed at a constant interval B for each registration mark 1a. The film 1 is cut at a cutting position 1c substantially between the rough surface processed portions 1b, and the cut film 1 is bent along a fold line 1d set through the rough surface processed portion 1b. A packaging bag 6 shown in FIG. 8B is formed. The periphery of the packaging bag 6 is sealed with a heat seal part 6a. Although the figure shows a state in which the upper end is opened, this portion is finally sealed. The sealed packaging bag 6 can be easily opened by tearing the rough surface processed portion 1b with a hand or the like. In addition to the above, processing of perforations and through holes, printing, partial silicone processing, and the like are performed on the film 1 as necessary. Some of the above processes can be performed by the packaging machine of the present embodiment, and details will be described later.
[0020]
Returning to FIG. 1, the packaging machine will be described. The traveling mechanism 2 includes a pair of rollers 20 and 21 that sandwich the film 1. At least one of the rollers 20 and 21 is driven by a motor (not shown), whereby the film 1 travels in the above direction. The roller 21 is connected to a pulse generator 22. The pulse generator 22 generates a number of pulse signals proportional to the rotation amount of the roller 21 and outputs them to the control mechanism 5.
[0021]
The processing roll 3 and the drive mechanism 4 are configured as shown in FIGS. As shown in detail in FIGS. 5 and 6, the processing roll 3 has a large-diameter portion 30 and a small-diameter portion 31 that are coaxial with each other. A pair of protrusions 32 are provided on the outer periphery of the large-diameter portion 30 so as to bisect the work roll 3 in the circumferential direction. The number and shape of the protrusions 32 are appropriately changed according to the type of processing to be performed by the processing roll 3. In FIG.5 and FIG.6, the top part 32a of the projection part 32 curves in the cylindrical shape along the circumferential direction of the processing roll 3, and the inclined part 32b is provided in the both ends of the top part 32a, respectively. For example, sandpaper 33 is wound around the outer periphery of the large-diameter portion 30 as shown in FIG. In this case, the roughened surface processed portion 1 b can be formed by pressing the abrasive grain surface 33 a lifted by the protruding portion 32 against the film 1. In addition, although FIG.7 (b)-(e) shows the modification of the processing roll 3, it mentions later for details. As shown in FIG. 6, in order to attach the work roll 3 to the drive mechanism 4, a screw hole 31 a is provided in the small diameter portion 31, and an attachment hole 34 is formed in the center of the work roll 3.
[0022]
As shown in FIGS. 3 and 4, the drive mechanism 4 includes a holder 40 for supporting the processing roll 3, a metal cylindrical anvil 41 disposed opposite to the processing roll 3, and the processing roll 3. And a servo motor 42 as a drive source. The holder 40 has a fixed portion 40a fixed to a fixed portion (for example, an unillustrated machine body) of the packaging processing machine, and a movable portion 40c connected to the fixed portion 40a via a pin 40b. A shaft 43 can be rotatably attached to the movable portion 40 c, and the processing roll 3 is coaxially attached to one end side (the left end side in FIG. 4) of the shaft 43 via a shaft joint 44.
[0023]
A pulley 45 a is fixed to the other end side of the shaft 43. A belt 46 is wound between the pulley 45 a and a pulley 45 b attached to the servo motor 42, whereby the rotation of the servo motor 42 is transmitted to the work roll 3. The anvil 41 is supported by a fixed portion of the packaging machine in the same manner as the fixed portion 40a of the holder 4 and is rotatable about its axis. A coil spring 47 is provided between the fixed portion 40a and the movable portion 40c, and the movable portion 40c is urged counterclockwise in FIG. 3 about the pin 40b by the repulsive force. Thereby, the processing roll 3 is pressed toward the outer peripheral surface of the anvil 41. The film 1 is guided between the processing roll 3 and the anvil 41 and processed by the processing portion on the outer periphery of the processing roll 3.
[0024]
As shown in FIG. 1, the control mechanism 5 includes a registration mark sensor 50, an operation panel 51, a controller 52, and a servo driver 53 provided in the travel path of the film 1. The registration mark sensor 50 detects a registration mark 1 a (see FIG. 8A) provided on the film 1 and outputs a predetermined detection signal to the controller 52. As this sensor 50, for example, a reflective optical sensor can be used. The operation panel 51 accepts a machining condition setting operation by an operator and outputs a signal corresponding to the setting result to the controller 52. The conditions that can be set on the operation panel 51 include a value related to the pitch of the processing position on the film 1, for example, the interval B shown in FIG. The controller 52 determines the rotational speed of the servo motor 42 based on the output signals of the registration mark sensor 50 and the pulse generator 22 and the signal corresponding to the interval B output from the operation panel 51, and outputs a control signal corresponding thereto. Output to the servo driver 53. The servo driver 53 drives the servo motor 42 according to the position and speed instructed from the controller 52.
[0025]
Next, the operation of the packaging machine according to the present embodiment will be described by taking as an example the case of forming the roughened surface processing portion 1b shown in FIG. When the rough surface processed portion 1b is formed, first, as prepared, the sandpaper 33 is wound around the outer peripheral surface of the processing roll 3 as already described with reference to FIG. The interval B of a) is set.
[0026]
After the above preparation is completed, the film 1 is carried in from the right side of FIG. 1 and conveyed to the processing roll 3 side by the traveling mechanism 2 at a predetermined speed. When the registration mark sensor 50 outputs a detection signal of the registration mark 1 a as the film 1 travels, the controller 52 drives the servo motor 42 based on the set value of the interval B and the output signal from the pulse generator 22. Is determined as follows.
[0027]
That is, if the registration mark sensor 50 detects the registration mark 1a and the interval between the processing rolls 3 as a predetermined value W and the traveling speed of the film 1 is V per second, the registration mark 1a reaches the processing roll 3 position. It is W / V seconds after the mark 1a is detected, and it takes B / V seconds for the film 1 to travel further by the interval B. That is, if the rotation of the servo motor 42 is controlled so that the abrasive grain surface 33a is in contact with the film 1 when (W + B) / V seconds have elapsed after the registration mark 1a is detected, the distance B is separated from the registration mark 1a. The rough surface processed portion 1b is formed at the position.
[0028]
Accordingly, the controller 52 obtains the speed V by differentiating the accumulated number of pulse signals from the pulse generator 22 with respect to time, specifies the interval B by the output signal from the operation panel 51, and gives these values in advance. Using the specified value W, the remaining time Tr = (W + B) V until the processing by the abrasive grain surface 33a is started is obtained. Then, from the current rotational position of the servo motor 42 and the remaining time Tr, the drive speed of the servo motor 42 required to bring the abrasive grain surface 33a into contact with the film 1 after Tr seconds is determined, and the speed is determined by the servo driver 53. To instruct. The current position of the servo motor 42 may be specified, for example, by detecting the rotation amount of the servo motor 42 with an encoder or the like. If the servomotor 42 is rotated to a predetermined reference position in preparation for the next processing after the rough surface processing corresponding to the detection of one registration mark 1a is completed, it is not necessary to detect the current position one by one. The servo motor 42 is successively compared between the number of output pulses of the pulse generator 22 and the amount of rotation of the servo motor 42 (for example, detected by an encoder) from the detection of the registration mark 1a to the start of machining. The speed may be corrected as appropriate.
[0029]
If the rotation operation of the servo motor 42 is controlled as described above, the abrasive grain surface 33a and the film 1 come into contact with each other at a position separated by the interval B with respect to the registration mark 1a, and the rough surface processed portion 1b is formed as set. Is done. Moreover, since both ends of the protrusion 32 are inclined portions 32b, the degree of the rough surface processing becomes weaker as the distance from the center of the rough surface processed portion 1b increases at both ends of the rough surface processed portion 1b.
[0030]
In addition, the speed of the processing roll 3 and the film 1 does not correspond only by the above control, and there exists a possibility that the rough surface process part 1b may be shaved excessively by both relative displacement. Therefore, preferably, when the abrasive grain surface 33a starts to contact the film 1, the rotational speed of the servo motor 42 is adjusted so that the tangential speed of the abrasive grain surface 33a matches the speed of the film 1. FIG. 2 shows an example of the relationship between the elapsed time when such speed control is performed and the rotational position and rotational speed of the work roll 3. It is assumed that the registration mark 1a is detected at the origin of FIG. 2A and the processing roll 3 is driven so that rough surface processing is started at time t1. If the relative speed between the film 1 and the abrasive grain surface 33a is zero at time t1, the rotational speed of the work roll 3 is kept constant as shown by the solid lines in FIGS. 2 (a) and 2 (b). On the other hand, when the abrasive grain surface 33a is slower than the film 1 at the time t1, the processing roll 3 is accelerated as shown by the alternate long and short dash line L1, and conversely, when the abrasive grain surface 33a is faster than the film 1, The processing roll 3 is decelerated as shown by the dotted line. In either case of acceleration or deceleration, the speed of the processing roll 3 is returned to the speed before the time t1 after the processing end times t2 and t3. When the processing roll 3 rotates to a predetermined position, the processing roll 3 stops in preparation for processing corresponding to the next detection of the registration mark 1a.
[0031]
In the above embodiment, the film 1 is the packaging material, the travel mechanism 2 is the travel means, the operation panel 51 is the setting means, the pulse generator 22 is the travel amount detection means, and the controller 52 is the rotation control means and the speed control means. The registration mark 1a corresponds to an alignment index, and the registration mark sensor 50 corresponds to an index detection unit.
[0032]
In the above embodiment, the sandpaper 33 is wound around the outer peripheral surface of the processing roll 3 to perform the partial roughening, but the present invention is not limited to such a form. For example, the top portion 32a of the protrusion 32 may be used to partially apply silicone to the film 1 or perform printing partially.
[0033]
Instead of the processing roll 3 shown in FIG. 7A, the one shown in FIGS. 7B to 7E may be mounted on the packaging processing machine. The processing roll 3A shown in FIG. 7B has a conical protrusion 32A provided on the outer peripheral surface thereof. If this processing roll 3A is used, the film 1 can be perforated at a desired pitch by piercing the film 32 with the protrusion 32A. The processing roll 3B shown in FIG. 7C has a plurality of protrusions 36 each having a substantially triangular cross section on the outer peripheral surface thereof spaced apart in the axial direction, and a cutting edge 36a is provided on each ridgeline. If this processing roll 3B is utilized, the perforation can be formed in the film 1 by each cutting edge 36a. The processing roll 3 </ b> C in FIG. 7D is provided with a protrusion 37 having a substantially triangular cross section on the outer peripheral surface thereof over almost the entire length in the axial direction and a cutting edge 37 a on the ridgeline. If this processing roll 3C is used, the film 1 can be cut at a desired pitch by setting the width of the cutting edge 37a to be larger than the width of the film 1 in the same direction. The processing roll 3D shown in FIG. 7E is provided with axial projections 38 at appropriate intervals on the outer peripheral surface, and each projection 38 can be heated by a heating means (not shown) such as an electric heater. It is said that. If this processing roll 3D is utilized, the film 1 can be heat-sealed at an appropriate pitch. Each protrusion 38 corresponds to a heating unit. It is also possible to perform partial heat sealing by heating the protrusion 32 in FIG.
[0034]
The relative speed at the contact position between the processing roll 3 and the film 1 is not limited to zero, and may be set to an appropriate value as necessary. In the embodiment, the rough surface processed portion 1b is provided at a predetermined distance with respect to the registration mark 1a. However, such a reference position does not exist, and only the pitch of the processed position is desired to match a predetermined value. In addition, the present invention is suitable. In that case, the registration mark sensor 50 can be omitted. When the traveling speed of the packaging material can be regarded as constant, the traveling amount may be calculated by detecting the set value of the traveling speed without obtaining the actual speed using a pulse generator or the like. The packaging bag formed from the packaging material is not limited to the form shown in FIG.
[0035]
【The invention's effect】
As described above, according to the present invention, the information related to the travel amount of the packaging material is detected, and the rotation operation of the processing roll is controlled according to the detection result. It can be processed at a desired pitch while traveling, and there is no need to replace the processing roll when changing the pitch. Moreover, desired processing can be performed at a predetermined position with reference to the alignment index of the packaging material. Furthermore, it is possible to provide a packaging machine suitable for partial rough surface processing that requires the processing roll and the packaging material to be repeatedly contacted only within a certain range. In addition, the degree of processing can be gradually changed at least at the end of the processing range of the processing roll. In addition, it is possible to provide a packaging machine suitable for processing a packaging material at a desired speed and, in particular, a type in which a relative displacement between the processing roll and the packaging material is not desired.
[Brief description of the drawings]
FIG. 1 is a diagram showing a schematic configuration of a packaging processing machine according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating an example of control of the rotational position and rotational speed of a processing roll by the controller of FIG. 1;
3 is a diagram showing details of a driving mechanism for a processing roll in the packaging machine shown in FIG. 1;
4 is a view showing a state in which the mechanism of FIG. 3 is viewed from the direction of arrow IV in FIG.
5 is a front view of a processing roll in the packaging machine of FIG. 1. FIG.
6 is a view showing a state in which the processing roll of FIG. 5 is viewed from the direction of arrow VI in FIG.
FIG. 7 is a perspective view showing various aspects of the processing roll.
FIGS. 8A and 8B are diagrams for explaining packaging materials, in which FIG. 8A shows a packaging material in the middle of processing, and FIG. 8B shows a state formed in a packaging bag.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Packaging material 1a ... Registration mark 1b ... Rough surface processing part 2 ... Traveling mechanism 3 ... Processing roll 4 ... Drive mechanism 5 ... Control mechanism 6 ... Packaging bag 22 ... Pulse generator
32, 35, 36, 37, 38 ... projection 50 ... registration mark sensor 51 ... operation panel 52 ... controller

Claims (1)

Traveling means for traveling the packaging material along a predetermined traveling route, and a processing roll provided with an outer peripheral surface facing the traveling route, while traveling the packaging material along the traveling route In a packaging machine for processing the packaging material by rotating the processing roll,
Index detecting means for detecting a plurality of alignment indexes provided side by side in the travel direction of the packaging material at a specific position in the travel path;
A setting means for setting a dimension between the plurality of alignment indexes and a processing position to be processed in association with each alignment index;
A travel amount detection means for detecting information related to the travel amount of the packaging material;
Information detected by the index detection means, a set value set by the setting means, and detection by the travel amount detection means so that the plurality of processing positions are arranged at a predetermined pitch in the running direction of the packaging material. Rotation control means for controlling the rotation operation of the processing roll based on the information obtained,
Speed control means for controlling the rotational speed of the processing roll so that the relative speed at the contact position between the processing roll and the packaging material is a predetermined value;
Comprising
Wherein forming a protrusion which is abrasive surface to the outer peripheral surface of the work roll, Thus also it is curved along a top portion of the protrusion in the circumferential direction of the work roll, further, the circumferential direction of the protrusion On both sides, provided with inclined portions that gradually recede toward the center in the radial direction of the work roll as the distance from the top portion in the circumferential direction increases.
The speed control means controls the rotation operation so that the relative speed becomes zero when the protrusion of the processing roll comes into contact with the packaging material,
The processing roll is elastically pressed toward the packaging material, the projections that are the abrasive grain surfaces of the processing roll are brought into contact with the packaging material, and the inclined portion determines the degree of processing of the packaging material. A packaging machine characterized by being gradually changed.

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