JP4707540B2 - Double notch device in roll type automatic packaging machine - Google Patents

Description

  The present invention relates to an apparatus for forming a notch for opening a packaging bag made by a roll type automatic packaging machine, and more particularly to a notch apparatus for simultaneously forming notches on both lateral sides of a packaging bag.

  As described in Patent Document 1, the conventional notch device of the roll type automatic filling and packaging machine can adjust the mounting position of the notch device according to the width of the manufactured packaging bag and the depth of the notch. ing. Further, in a two-pack type roll-type automatic filling and packaging machine that manufactures two types of packaging bags at the same time, both so-called notch devices are provided that can simultaneously form notches on both ends of the two-packaging bags.

  Both notch devices of such a two-pack type roll type automatic filling and packaging machine are equipped with two drive motors for rotating the notch blades in the notch mechanisms at both ends, and the distance between the two notch devices is manufactured. A structure that can be adjusted according to the width of the packaging bag and the depth of the notch is adopted.

However, such a notch device has the following problems.
(1) Since two drive motors are required, the cost increases. In particular, when a servo motor that can easily control the rotational position and rotational speed is adopted, in addition to the motor body, an electronic control unit that adjusts the power source and the origin position for adjusting the two notch positions and the rotational position or rotational speed. 2 sets are required, which increases the cost.
(2) Since there are two servo drive motors, synchronization control between the two sets of electronic control units is required, and the control operation itself is complicated.

For this reason, adopting a method of driving the two notch mechanisms using one servo motor is an effective method for reducing the cost. In this drive system, the driving force of one servo motor is transmitted to two notch mechanisms using a normal drive belt or the like, but the length of the drive belt also changes when the interval between the two notch mechanisms is changed. Therefore, a constant tension is applied to the drive belt using an idler pulley or the like pulled by an elastic body such as a spring in order to absorb a change in the length of the drive belt.
Japanese Patent Laid-Open No. 06-171625

  However, in a mechanism in which tension is applied to only one side of the servo motor drive belt that is stretched over the pulley connected to the drive shafts of the two notch mechanisms, the drive of the notch mechanism is changed when the interval between the two notch mechanisms changes. The rotational position of the shaft is shifted, and the notch blade origin of both notch devices is distorted.

  The present invention was created in view of the problems of both notch devices in the above-described conventional roll type automatic packaging machine, so that the notch blade origin of both notch devices does not change even when the interval between the two notch mechanisms changes. An object of the present invention is to provide a driving belt tension applying mechanism.

  In order to achieve the above object, the tension applying mechanism in the notch device of the roll type automatic wrapping machine according to claim 1 of the present invention includes both end portions obtained by cutting and folding the continuously transported packaging film into two. A roll type automatic packaging machine that forms a packaging bag by vertically sealing with respect to the content and filling the contents thereafter, and provides notches for opening to both ends of the formed packaging bag, The two notch devices for providing the opening notch include one servo motor, two notch mechanisms that can be adjusted with respect to each other, and a drive belt that transmits the driving force of the servo motor to the two notch mechanisms. And a tension applying mechanism that absorbs the slack of the drive belt, and the tension applying mechanism is for the slack of the drive belt of the servo motor that occurs when the interval between the two notch mechanisms is changed. Drive shaft of the two notch mechanism in which the drive belt is stretched is configured to absorb the slack so as not to rotate.

  Further, the tension applying mechanism according to claim 2 of the present invention is provided with two idler pulleys at the same position on both sides of the servo motor drive belt spanned by the drive shafts of the two notch mechanisms. The same tension is applied to both sides of the drive belt by pulling evenly with an elastic body such as a spring.

  According to the tension applying mechanism in both the notch devices of the roll type automatic packaging machine according to claim 1 and claim 2 of the present invention, the distance between the two notch mechanisms according to the width of the manufactured packaging bag and the depth of the notch. It is possible to prevent the notch blade origin of both notch devices from being changed even when is changed.

  As explained above, according to the two notch devices in the roll type automatic packaging machine according to the present invention, even when the interval between the two notch mechanisms is changed in accordance with the width of the manufactured packaging bag or the depth of the notch. The origin of both notch devices can be kept unchanged, and the manufacturing cost of both notch devices can be reduced at the same time.

  First, the whole structure of the roll type automatic packaging machine concerning this invention is demonstrated using FIG. FIG. 1 is a front view showing a configuration example of a roll type automatic packaging machine according to the present invention. In the present embodiment, description is made using an example of a double-packaging type packaging bag. The number of continuous-packaging is not limited to two-packaging, but a single-packaging format or a multiple-packaging format, etc. It is possible to employ any number of continuous packages.

  As shown in FIG. 1, a reel is provided on the front left side of a roll type automatic packaging machine 1 (hereinafter abbreviated as automatic packaging machine 1). On this reel, an original fabric roll FH around which a packaging film is wound is held so as to be removable. In addition, a film folding mechanism and a filling mechanism are disposed at the upper part of the automatic packaging machine 1, and this filling mechanism enters the hopper 3 containing raw materials (contents) to be put into the packaging bag, and enters the hopper 3. It is composed of a leveler 2 that issues an alarm when the amount of raw material is low, and a pump 4 and a pump 5 that deliver the raw material in the hopper 3 to the inside of the packaging bag.

On the front surface of the automatic packaging machine 1, from the upper side, a vertical sealing mechanism 6, a first horizontal sealing mechanism 7, a second horizontal sealing mechanism 8, a perforated vertical cutter mechanism 9, a notch device 10, a perforated horizontal cutter mechanism 11, a cutting horizontal cutter. A mechanism 12 is provided. Furthermore, an operation box 14 for operating the automatic packaging machine 1 is provided on the right side of the automatic packaging machine 1.
Although not shown in FIG. 1, the vertical seal mechanism 6 is composed of two vertical seal rolls, and the front side vertical seal roll (moving side seal roll) is shown in FIG. On the other hand, the vertical seal roll on the back side (the back side of the paper) is provided in a state facing the front side vertical seal roll in the direction perpendicular to the paper surface, and is fixed to the automatic packaging machine 1 (fixed side seal roll).

  The horizontal seal mechanism is composed of a first horizontal seal mechanism 7 and a second horizontal seal mechanism 8, and these two horizontal seal mechanisms are shown in FIG. These two horizontal seal rolls (moving side seal rolls) have two horizontal seal rolls in pairs on the back side (back side of the paper). These two lateral seal rolls on the back side are provided in a state of being opposed to each other in the direction perpendicular to the paper surface, and are fixed to the machine base 10 of the automatic packaging machine 1 (fixed side seal roll).

  The packaging film is made of a transparent or translucent material, for example, a base film such as PET, or a heat seal film such as polyethylene having a melting point lower than that of the base film. The packaging film may have a three-layer structure of a base film, an intermediate film, and a heat seal film.

  The packaging film is pulled out from the original roll FH attached to the reel. The drawn packaging film F is bisected in the longitudinal direction by the slitter mechanism, and the wrapping films bisected by the film folding mechanism are overlapped and sent to the vertical seal mechanism 6 directly below. The longitudinal seal roll of the longitudinal seal mechanism 6 heat-seals both ends in the longitudinal direction of the two overlapping packaging films and sends them to the first lateral seal mechanism 7 directly below. By this vertical sealing, the packaging film is formed into a cylindrical shape.

  The cylindrical packaging film is sealed in the lateral direction (width direction) of the packaging film by the lateral sealing roll of the first lateral sealing mechanism 7, and the bottom of the packaging body is formed by this lateral sealing. A filling pipe of a filling mechanism is inserted into the packaging film formed in a bottomed cylindrical shape, and the raw material in the hopper 3 is filled into the packaging body through this filling pipe.

  Further, the horizontal sealing roll of the first horizontal sealing mechanism 7 horizontally seals the opening side of the packaging film filled with the raw material, whereby the raw material filled in the bottomed cylindrical packaging film is sealed and packaged. It becomes a bag form. This packaging bag is sent to the transverse seal roll of the second transverse seal mechanism 8 directly below. The second lateral seal roll laterally seals the lateral seal portion formed by the first lateral seal mechanism, and forms a linear seal or the like for making the lateral seal portion more reliable.

  Thereafter, vertical perforation is applied to the central seal portion of the double-packaging packaging bag by the perforated vertical cutter mechanism 9. In addition, this perforation provision is arbitrarily selectable, such as the case where it grants by a packaging bag form, and the case where it does not provide.

  Next, both notch devices 10 simultaneously form notches for opening on both ends of the double-packaging packaging bag, and the perforation is processed to the central portion of the horizontal seal by the perforated horizontal cutter mechanism 11 or the cutting horizontal cutter mechanism 12. Or it is cut and processed into individual packaging bags.

  FIG. 2 is a top view illustrating both notch devices according to the present invention, and FIG. 3 is a cross-sectional right side view of both notch devices according to the present invention as seen from the side.

  As shown in FIGS. 2 and 3, both notch devices 10 have two notch mechanisms including a left notch mechanism 20 and a right notch mechanism 21, one servo motor 40, and two driving forces from the servo motor 40. It can be classified into a drive belt 35 that transmits to the drive shafts of the two notch mechanisms and a tension applying mechanism that absorbs slackness of the drive belt 35.

  A specific configuration and schematic operation in each of the above portions will be described. The left notch mechanism 20 has a drive shaft 22 of the left notch mechanism to which a drive force for rotating the notch blade is applied, and a pulley or the like is fitted into the drive shaft 22. A driving belt 28 is stretched between the pulley and the notch rotating shaft 26 of the left notch mechanism, and the rotational driving force is transmitted to the notch rotating shaft 26. Then, the left notch blade 30 attached to the notch rotating shaft 26 rotates to give a notch to the left end of the packaging bag. The left notch mechanism 20 can be arbitrarily moved in the left-right direction in front view on the slide plate 34 attached to the roll type automatic packaging machine body.

  Further, the protective cover 32 of the left notch mechanism protects the operator's fingertips and the like from the rotating notch blade 30 by covering the portion other than the notch attachment to the packaging bag.

  The right notch mechanism 21 has a drive shaft 23 of the left notch mechanism to which a drive force for rotating the notch blade is applied. At the same time, a servo motor 40 is directly connected to the drive shaft 23.

  A pulley 36 and a pulley 37 are fitted on the drive shaft 23, and a drive belt 29 is stretched between the pulley 37 of the drive shaft 23 and the pulley 38 of the notch rotation shaft 27 of the right notch mechanism. Rotational driving force is transmitted to the notch rotating shaft 27. Then, the right notch main body 39 and the right notch blade 31 attached to the notch rotating shaft 27 rotate to give a notch to the right end of the packaging bag. The right notch mechanism 21 can be arbitrarily moved in the left-right direction in front view on the slide plate 34 attached to the roll type automatic packaging machine body.

  Further, the protective cover 33 of the right notch mechanism protects the operator's fingertips and the like from the rotating notch blade 31 by covering the portion other than the notch attachment to the packaging bag.

  Next, the driving belt 35 that transmits the driving force from one servo motor 40 to the driving shafts of the two notch mechanisms 20 and 21 and the tension applying mechanism that absorbs slackness of the driving belt 35 will be described. The drive belt 35 is stretched over a pulley 36 fitted in the servo motor 40 to transmit drive force to the drive shaft 22 of the left notch mechanism and the drive shaft 23 of the right notch mechanism. The drive shaft of the servo motor 40 and the drive shaft 23 of the right notch mechanism are coaxial, and a pulley 36 and a pulley 37 are fitted on the drive shaft in a two-stage stack.

  Since the left notch mechanism 20 and the right notch mechanism 21 can be arbitrarily moved in the left-right direction when viewed from the front, the distance between these two notch mechanisms changes according to the width of the packaging bag and the depth of the notch. Therefore, the length required for the drive belt 35 also changes in conjunction with this. In order to cope with such a situation, the drive belt 35 has a length corresponding to the maximum notch mechanism interval, and at the same time, the drive belt 35 has a belt slack to cope with a case where the notch mechanism interval becomes narrow. A tensioning mechanism for absorbing is provided.

  The tension applying mechanism includes two idler pulleys 24 and 25 that are stretched around a drive belt 35, a pulley base 41 to which two idler pulleys are attached, and a pulley base 41 that is freely movable in the left-right direction when viewed from the front. The pulley base slide plate 42 (shown in FIGS. 4 and 5) and the spring 43 that pulls the pulley base 41 in the right direction when viewed from the front (downward in the description of FIG. 2).

  In the tension applying mechanism of the present invention, two idler pulleys 24 and 25 are provided at the same position on both sides of the servo motor drive belt spanned by the drive shafts of the two notch mechanisms. By pulling the attached pulley base 41 evenly by the spring 43, the same tension is applied to both sides of the drive belt.

  FIG. 4 is a top view showing a state in which the distance between two notch mechanisms is narrowed in both notch devices according to the present invention. As shown in FIG. 4, the two notch mechanisms including the left notch mechanism 20 and the right notch mechanism 21 move on the slide plate 34 of the notch mechanism so that the distance between them is reduced, and the drive shaft 22 of the left notch mechanism. The distance between the drive shaft 23 of the right notch mechanism is also narrowed. For this reason, the two idler pulleys 24 and 25 and the pulley base 41 are moved on the pulley base slide plate 42 in the left direction in the front view (upward in the description of FIG. 4) while being pulled by the drive belt 35. The spring 43 is in an extended state by the amount. The idler pulleys 24 and 25 are rotatably attached to the pulley base 41, and the spring 43 in such a state is not yet fully extended, so that a constant tension is applied to the drive belt 35. . Since the idler pulley 24 and the idler pulley 25 uniformly absorb the slack on both sides of the drive belt 35 until reaching such a state, the drive shaft 22 of the left notch mechanism and the drive shaft of the right notch mechanism. 23 can maintain a stationary state without rotating. As a result, the notch blade origin of both notch devices 10 does not change even if the interval between the two notch mechanisms is changed.

  FIG. 5 is a top view showing a state where the distance between two notch mechanisms is widened in both notch devices according to the present invention. As shown in FIG. 5, the two notch mechanisms including the left notch mechanism 20 and the right notch mechanism 21 move on the slide plate 34 of the notch mechanism so that the distance between them increases, and the drive shaft 22 of the left notch mechanism. And the distance between the drive shafts 23 of the right notch mechanism is widened. Therefore, the drive belt 35 is slackened, and the two idler pulleys 24 and 25 and the pulley base 41 are moved on the pulley base slide plate 42 in the right direction when viewed from the front (downward in the description of FIG. 5). The spring 43 is in a contracted state accordingly. The idler pulleys 24 and 25 are rotatably attached to the pulley base 41, and the spring 43 in such a state is not yet contracted, so that a constant tension is applied to the drive belt 35. . Since the idler pulley 24 and the idler pulley 25 uniformly absorb the slack on both sides of the drive belt 35 until reaching such a state, the drive shaft 22 of the left notch mechanism and the drive shaft of the right notch mechanism. 23 can maintain a stationary state without rotating. As a result, the notch blade origin of both notch devices 10 does not change even if the interval between the two notch mechanisms is changed.

  As described above, in the notch device in the roll type automatic packaging machine according to the present invention, when the interval between the two notch mechanisms is changed in accordance with the width and the depth of the notch produced as described above. Further, it is possible to provide a drive belt tension applying mechanism in which the notch blade origin of both notch devices is not changed.

It is a front view which shows one structural example of the roll type automatic packaging machine which concerns on this invention. It is the top view which looked at both notch devices concerning the present invention from the top. It is the cross-sectional right side view which looked at both notch apparatuses concerning this invention from the side. In both notch devices concerning the present invention, it is a top view showing the state where the interval of two notch mechanisms was narrowed. In both notch devices concerning the present invention, it is a top view showing the state where the interval of two notch mechanisms was widened.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Roll type automatic packaging machine 2 Leveler 3 Hopper 4, 5 Pump 6 Vertical seal mechanism 7 First horizontal seal mechanism 8 Second horizontal seal mechanism 9 Perforated vertical cutter mechanism 10 Double notch device 11 Perforated horizontal cutter mechanism 12 Cutting horizontal cutter Mechanism 13 Slide 14 Operation box 20 Left notch mechanism 21 Right notch mechanism 22 Drive shaft of left notch mechanism (including pulley)
23 Drive shaft for right notch mechanism (including pulley)
24, 25 Idler pulley 26 Notch rotation axis of left notch mechanism (including pulley)
27 Right notch mechanism notch rotation shaft (including pulley)
28 Drive belt stretched between the drive shaft of the left notch mechanism and the notch rotation shaft 29 Drive belt stretched between the drive shaft of the right notch mechanism and the notch rotation shaft 30 Left notch blade 31 Right notch blade 32 Protective cover for left notch mechanism 33 Protective cover for right notch mechanism 34 Slide plate for notch mechanism 35 Drive belt for transmitting drive force from servo motor 36 Pulley fitted into servo motor 37 Drive shaft pulley 38 for right notch mechanism Right side Notch rotating shaft pulley of notch mechanism 39 Right notch body 40 Servo motor 41 Pulley base 42 Pulley base slide plate 43 Spring

Claims (2)

The packaging film that is continuously transported is cut into two pieces and folded vertically, and then vertically sealed, and then the transverse seal and the contents are filled to form a packaging bag. At both ends of the formed packaging bag, It is a roll type automatic packaging machine that gives a notch for opening,
The two notch devices for providing the opening notch include one servo motor, two notch mechanisms that can be adjusted with respect to each other, and a drive belt that transmits the driving force of the servo motor to the two notch mechanisms. And a tension applying mechanism that absorbs the slack of the drive belt,
The tension applying mechanism is for the slack of the drive belt of the servo motor that occurs when the interval between the two notch mechanisms is changed.
A tension applying mechanism in both notch devices of a roll type automatic packaging machine, wherein the slack is absorbed so that the drive shafts of the two notch mechanisms around which the drive belt is stretched do not rotate. . The tension applying mechanism is provided with two idler pulleys at the same positions on both sides of the servo motor drive belt spanned by the drive shafts of the two notch mechanisms, and the two idler pulleys are evenly pulled by an elastic body such as a spring. 2. The tension applying mechanism in both notch devices of a roll type automatic packaging machine according to claim 1, wherein the same tension is applied to both sides of the drive belt.

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