JP3221693B2 - Bag making and packaging machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag making and packaging machine.

[0002]

2. Description of the Related Art FIG. 10 shows a typical example of this type of conventional bag making and packaging machine. In this bag making and packaging machine, a film roll 1 supported on a cantilever support shaft 3 ', whose axis is perpendicular to the front-rear direction of the machine body, is provided at the rear of the machine body 2 installed vertically on the base body 7. A long film 4 is fed forward, and the fed film 4 is sent to a former 6 via guide rollers 8, 9 and a dancer roller 10, etc., where the film 4 is formed by a vertical sealing member 61 while being formed into a tube shape. Seal the joint and set the film tube 5
Is formed, and the upper and lower portions of the film tube 5 are sealed with an end seal member 62 to form a bag.

[0003]

In the above-described bag making and packaging machine, (1) a film roll 1 having a large winding diameter is used in order to reduce the frequency of exchanging the film roll 1 and increase the operation rate. However, since the weight of the film increases by the square of the winding diameter, the film roll 1
Handling work such as loading work on the support shaft 3 'is difficult,
(2) Normally, when the film is loaded, positioning on the support shaft 3 'is performed so that the center line of the film 4 unreeled from the film roll 1 coincides with the center line of the film tube 5 at the time of molding. (3) In addition, (3) the rear surface of the film 4 must be located inside the film tube 5, so that the film 4 unwound from the film roll 1 moves. The inside is moved in such a way that its back faces outward. On the other hand, the joining of the preceding film and the succeeding film is performed by using an adhesive tape between the guide rollers 8 and 9, and the film 4 to be joined at this portion has a rear surface as described above. Because it faces the outside, the back side will be joined together, so that the pattern provided on the front side can not be matched, or the joining point enters the inside of the bag and it can not be used as a product etc. There are various problems.

Accordingly, an object of the present invention is to solve the above-mentioned problems of the conventional bag making and packaging machine, and to easily match the center line of the film unwound from the loaded film roll with the center line of the film tube. As well as bonding the surface of the film,
Bag-making and packaging that allows easy and accurate pattern matching, allows large-diameter, large-diameter film rolls to be loaded with simple operations, and reduces the frequency of film replacement and increases the operating rate. To provide a machine.

[0005]

According to the present invention, in order to achieve the above object, a long film is fed forward from a film roll supported by a cantilever support shaft installed at a rear portion of an airframe. In the bag making and packaging machine, the film roll is sealed by sealing the seams of the film while forming the unwound film into a tube with a former, and further, end-sealing the upper and lower sides of the tube. The cantilever support shaft is positioned so that the axis of the support shaft extends along the longitudinal direction of the fuselage, and the film unreeled from the film roll is inverted above it and inclined forward and backward in the horizontal plane so as to be deflected in a substantially right angle direction. And an inclined rod which can be translated in a horizontal plane. The inclined rod is provided on a pair of side frames provided so as to be able to move back and forth along the direction of the support shaft in a horizontal plane, and the side frames are horizontally extended between them. The guide rod is connected to the body by a rod and a rotating screw rod.
A pair of brackets are slidably penetrated, and a threaded bar is screwed into the brackets and has one end connected to a drive motor. It also has an edge sensor for detecting the edge of the film moving past the inclined rod, and control means for controlling the driving of the drive motor based on a signal from the edge sensor. The support shaft is provided on a support device which can be moved up and down.A flange is provided on the support shaft near the movable frame, and a sleeve is provided so as to be fitted on the flange. A spring is interposed between the film roll and the sleeve, which is constantly biased toward the film roll.A switch is provided above the sleeve, and a plurality of grip members extending and retracting in the radial direction are provided on the support shaft. The grip member is provided so as to protrude outward by the pressure of the fluid supplied to the inside of the support shaft, thereby gripping the winding tube of the film roll from the inside.

[0006]

According to the present invention as described above, a long film is moved forward from a film roll supported by a cantilever support shaft which is installed at the rear part of the fuselage and whose axis is arranged along the longitudinal direction of the fuselage. The formed film is formed into a tube with a former, and the seams of the film are sealed, and the upper and lower ends of the tube are end-sealed to form a bag. Inverted by the inclined rod that is tilted back and forth inside and turned around in a substantially right angle direction, so that the surface of the film is outside until it is fed out and turned over, and in this state, the leading film and The joining with the subsequent film is performed by joining the surfaces. If the center line of the film thus fed out does not coincide with the center line of the film tube, the inclined rod is moved in a horizontal plane so as to be coincident. Such an inclined rod is provided on a pair of side frames, and the side frames are rotated in a horizontal plane by a screw rod provided between the pair of brackets fixed to the body, in the direction of the support shaft. Is moved back and forth along the center, and the centering is performed as described above. In the case where the film centered in this way is displaced and performs a meandering motion, this is detected by an edge sensor. In response to the signal from the edge sensor, the driving of the drive motor of the screw rod is controlled by the control means, and the screw rod is rotated by the drive of the controlled drive motor to correct the meandering motion. Become. In addition, the supporting shaft is brought to a suitable position by the elevating device according to the size of the film roll, thereby facilitating the loading operation. Further, when the film of the film roll supported by the support shaft is worn and becomes small in diameter, the sleeve fitted on the flange of the support shaft is displaced by a spring interposed between the sleeve and the movable frame. This is detected by the operation of a switch provided thereabove, and when the film roll is loaded, a plurality of grip members provided on the support shaft and protruding and retracting in the radial direction are retracted inward so as not to disturb the loading. After loading, the grip member is projected outward to grip the rolled tube of the film roll from inside.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiment of the present invention shown in the drawings, the same parts as those of the conventional bag making and packaging machine are not shown, and the same parts are designated by the same reference numerals and the description is omitted. The following mainly describes the different parts. In FIG. 1, the film roll 1 is supported by a cantilever support shaft 3 of a support device 15, and the support shaft 3 is arranged so that its axis is perpendicular to the longitudinal direction of the machine body, that is, the direction in which the film 4 is fed out. I have. A plurality of sets of guide rollers 8 for guiding the film 4 unwound from the film roll 1 are provided.
9 and 11, and a dancer roller 10 and the like are provided. In the middle of these, the film 4 unwound from the film roll 1 is inverted above the support shaft 3 so as to be turned in a substantially perpendicular direction, that is, in the axial direction of the support shaft 3. A tilt rod 12 that is tilted at approximately 45 degrees is disposed at the center. As shown in FIGS. 1 to 3, the support device 15 for the support shaft 3 has a pair of fixed frames 14 established opposite the substrate 13 and a movable frame 16 oriented at right angles thereto. Rotating rollers 17 are provided on the upper and lower sides of the fixed frame 14, and the rotating rollers 17 come into contact with the opposing side surfaces of the movable frame 16, so that the movable frame 16 can be moved up and down. The movable frame 16 is provided horizontally and rotatably. The movable frame 16 is provided with connecting arms 18 on both sides thereof for connecting them.
Reference numeral 18 denotes a pair of working cylinders 19 established opposite the substrate 13.
Of the operating rod. Fig. 2 between movable frames 16
As shown in FIG. 2, a drive shaft 44 is pivoted above and in parallel with the support shaft 3, and pulleys 43 and 45 are mounted at positions facing the two shafts 3 and 44, respectively.
A belt 46 is stretched between 3 and 45, and the drive shaft 44 is driven by a drive motor 47 attached to one movable frame 16. FIG. 4 shows a joint 20 of the film 4, which has a pair of transverse electrostatic plates 29, 30 arranged between the guide rollers 8, 9, between which there is provided. A guide groove 36 is provided.

[0008] The inclined rod 12 is provided on a pair of side frames 21 provided together with the guide rollers 8 and 9 so as to be movable back and forth in the direction of the support shaft 3 in a horizontal plane. The side frames 21 are connected to each other by guide rods 22 stretched horizontally therebetween, and the guide rods 22 slidably penetrate a pair of brackets 23 fixed to the body of the vehicle. A screw rod 24 is arranged in parallel with the screw rod 24, and the screw rod 24 is screwed to the bracket 23 and rotatably supports the vicinity of both ends of the screw rod to the side frame 21,
A manual handle 25 is attached to one of the ends protruding outside the side frame 21, and a drive motor 26 is connected to the other. Reference numeral 27 denotes an edge sensor 27 for detecting an edge of the moving film 4, and the edge sensor 27 is connected to control means (not shown) for controlling the driving of a driving motor 26.
Reference numeral 28 denotes an eye mark detector for detecting an eye mark provided on the side edge of the film 4.

The support shaft 3 is generally constituted by a so-called air shaft, and has a hollow outer cylinder 32 provided with a plurality of through-holes 31 on the outer periphery. The outer cylinder 32 expands when a fluid pressure is applied to the inside of the outer cylinder 32. The inner cylinder 33 contracts when the fluid pressure disappears.
The through hole 31 is provided with a grip member 37 in which the enlarged head 34 abuts the outer periphery of the inner cylinder 33 and the leg portion 35 is slidably fitted in the through hole 31. A flange 38 is provided on the movable frame 16 of the outer cylinder 32, a sleeve 39 is fitted on the flange 38, and a spring 41 is interposed between the sleeve 39 and the movable frame 16, The sleeve 39 is constantly biased toward the film roll 1, and a proximity switch 42 is provided above the sleeve 39.

FIG. 8 shows a fluid circuit for supplying a pressurized fluid to the film support shaft 3 and the working cylinder 19, and a fluid from a fluid source is pumped by a pump 49 into two conduits 50, 51.
The first and second switching valves 52 and 53 are arranged in each of the conduits 50 and 51, and the first switching valve 52 can be switched by a manual operation. It is connected to the upper and lower portions 19 by conduits 55 and 56. When the operating rod of the operating cylinder 19 reaches the reference position, a switch 60 for detecting this is provided, and the second switching valve 53 is switched by the operation of the switch 60. 3 for inflow and discharge of fluid.

When the film roll 1 is loaded on the support shaft 3 as described above, the film roll 1 is placed on a carriage 58 or the like as shown in FIG. When the axis of the winding tube 57 is below the axis of the support shaft 3, the first switching valve 52 is manually operated to supply the fluid into the upper part of the working cylinder 19. At the same time, the support shaft 3 is lowered, and when its axis coincides with the axis of the winding tube 57, the first
The operation of the switching valve 52 is stopped to stop the support shaft 3, where the film roll 1 is loaded by fitting the winding tube 57 to the support shaft 3, and when the leading end of the film roll 1 contacts the flange 38, the film roll 1 is stopped. Stop 1 When loading, support shaft 3
The grip member 37 is retracted inward and does not interfere with loading. By this loading, the sleeve 39 is pressed by the winding tube 57 and comes to the position shown in FIG. 5 against the pressing force of the spring 41, and the sleeve 39 is detected by the switch 42. This is the normal position in the axial direction of the support shaft 3 of the film roll 1. Thereafter, the first switching valve 52 is manually operated in the opposite direction, the operating cylinder 19 is operated in the opposite direction to raise the support shaft 3, and when the support shaft 3 reaches the reference position, the switch 60 is turned on. When the second switching valve 53 is operated, the second switching valve 53 is switched to supply the fluid to the inside of the support shaft 3, and the inner cylinder 33 expands and projects the grip member 37 outward to move the inside of the winding tube 57 of the film roll 1. Grip from the side. In the above case winding tube
If the axis of 57 is above the axis of the support shaft 3, the support shaft 3
In the opposite direction.

When the loading of the film roll 1 onto the support shaft 3 is completed in this way, the film 4 is fed out.
The support shaft 3 is rotated via the belts 43, 45 and the belt 46, and as shown in FIG. 9, the fed film 4 is fed so that its surface is on the outside, moves upward, and then moves upward. When the film roll 1 has a large width L and the position of the inclined rod 12 in the horizontal plane is the solid line position in FIG. The center line a coincides with the center line of the tube 5. Assuming that the film roll 1 having a small width 1 is loaded in such a place, the center line of the film 4 unreeled from the film roll 1 does not coincide with the center line of the tube 5. Therefore, in such a case, the tilt rod 12 is operated by the manual handle 25,
Or, in the same horizontal plane by driving the drive motor 26,
By moving to the position indicated by the dashed line in FIG. When the film 4 meanders when it is centered in this way and moves from the inclined rod 12 toward the former, the edge sensor 27 detects the meandering, and the control signal is sent to the drive motor 26 of the threaded rod 24 by the signal.
Is controlled, and the screw rod 24 is rotated by the drive of the controlled drive motor 26 to correct the meandering movement. When the film is moving as described above, the tension is measured by a tension sensor (not shown),
When the measured value exceeds the set value, the operation of the drive motor 47 (FIG. 2) is controlled based on the measured value, and the feeding amount of the film 4 is kept constant.

The film 4 unwound from the film roll 1 in this manner seals the seams of the film while forming it into a tube by using a former in the same manner as in the conventional bag making and packaging machine described above. The upper and lower portions of the tube 5 are end-sealed to form a bag. When the film roll 1 is loaded, regardless of its size, the side surface of the film roll 1 on the side of the support device 15 abuts on the flange 38 and is positioned. The eye mark detector 28 for detecting the eye mark is provided with a film roll 1 like a conventional one.
There is no need to change its position depending on the size of the. Further, when the film 4 of the film roll 1 is worn out and its outer diameter becomes smaller than the inner diameter of the sleeve 39, the sleeve 39 is pushed by the spring 41 and moves to the left in FIG. This is notified by an alarm that does not occur, so the operation of the machine is stopped here, and the preceding film and the subsequent film are joined at the joint 20, but in this case, the leading film is After sucking and holding the end portion of the film, the cutter (not shown) is moved along the guide groove 36 to cut the half-end portion of the film, and then cut the tip portion of the subsequent film in the same manner. The ends of both films are butted, and the butted portions are joined with an adhesive tape. In this case, since the surfaces of the two films to be bonded have the outer surfaces as described above, pattern matching can be performed easily and accurately.

[0014]

The present invention is as described above, and a film unwound from a film roll supported by a cantilevered support shaft is installed at the rear part of the fuselage so that its axis is along the longitudinal direction of the fuselage. When forming a bag by sealing the joint of the film while forming it into a tube with a former, and then sealing the upper and lower ends of the tube to form a bag, the film unwound from the film roll is placed in a horizontal plane above the support shaft. The center line of the film unwound from the loaded film roll can be easily adjusted to the center line of the film tube because the tilt rod that can be translated in parallel turns and turns in a substantially right angle direction. Can be matched, and the surface of the film can be joined, making the pattern matching easy and accurate. That. The inclined rod is provided on a pair of side frames that can move back and forth in the horizontal plane along the direction of the support shaft. The side frames are connected by guide rods and screw rods, and the screw rods are screwed into the brackets. A drive motor is connected to one end of the film, and control means for controlling the drive of the drive motor is provided by a signal from an edge sensor for detecting an edge of the film moving past the tilt rod. In the case of meandering after passing the rod, the edge sensor detects this and controls the drive of the drive motor via the control means, and the screw shaft can be rotated to easily correct this. There is. And since the supporting shaft is provided on a supporting device that can be moved up and down, the supporting shaft is brought to a suitable position by a simple operation according to the size of the film roll to facilitate the loading operation, and the supporting shaft has A sleeve is provided so as to be fitted on the flange, a spring is interposed between the sleeve and the movable frame, and a switch is provided above the sleeve, so that when the film of the film roll is consumed, the sleeve is displaced. However, the switch can easily detect the consumption by detecting this,
The support shaft is provided with a plurality of grip members that protrude and retract in the radial direction, and the grip members protrude outward by the pressure of the fluid supplied to the inside of the support shaft, so that the winding tube of the film roll is inwardly moved. When loading a film roll, the gripping member is retracted inward so as not to disturb the loading, facilitating the loading operation.After loading, the film roll is securely gripped on the support shaft. There is an effect that can be. As a whole, the loading operation is extremely easy, regardless of the size of the film roll, and the center of the film can be accurately and quickly aligned with the center of the film tube, so that the film exchange frequency can be reduced. Therefore, there is an effect that the operation rate can be increased by reducing the number of the components.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of an embodiment of the present invention.

FIG. 2 is a partially cutaway front view of the same.

FIG. 3 is a plan view of the same.

FIG. 4 is a perspective view of a film joining portion of the above.

FIG. 5 is an enlarged vertical sectional front view of a part of the above.

FIG. 6 is a longitudinal sectional view when the supporting shaft is not supported.

FIG. 7 is a vertical cross-sectional view of the support shaft when it is supported.

FIG. 8 is a circuit diagram of the same working fluid.

FIG. 9 is an operation diagram for adjusting the center line of the film of the above.

FIG. 10 is a perspective view of a conventional typical bag making and packaging machine of the same type as the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Film roll 2 Aircraft body 3 Film support shaft 4 Film 5 Film tube 6 Former 12 Inclined rod 14 Fixed frame 15 Support device 16 Movable frame 19 Working cylinder 21 Side frame 22 Guide rod 23 Bracket 24 Screw rod 27 Edge sensor 31 Through hole 32 Outside Tube 33 Inner tube 37 Grip member

Claims (6)

(57) [Claims] 1. A long film is fed out from a film roll supported by a cantilever support shaft installed at a rear portion of a fuselage, and the film is fed into a tube while being formed by a former. In a bag making and packaging machine that seals and further forms a bag by end sealing the upper and lower sides of the tube, the film roll is arranged such that the axis of the support shaft of the film roll is along the front-rear direction of the machine body. An inclined rod that is tilted up and down in a horizontal plane so as to be turned around in a direction substantially perpendicular to the film unwound from the film roll and that can be translated in the horizontal plane is positioned upward. And a bag making and packaging machine. 2. The tilt rod is provided on a pair of side frames provided to be able to move back and forth along a direction of a support shaft in a horizontal plane, and the side frames are horizontally stretched therebetween. The guide rod and the rotary screw rod are connected to each other, the guide rod slidably penetrates a pair of brackets fixed to the body, and the screw rod is screwed to the bracket, and one end thereof has a drive motor. 2. The bag making and packaging machine according to claim 1, wherein 3. The bag making and packaging machine according to claim 2, further comprising an edge sensor for detecting an edge of the film moving past the inclined rod, and control means for controlling the driving of the drive motor based on a signal from the edge sensor. . 4. The bag making and packaging machine according to claim 1, wherein the supporting shaft is supported by a movable frame of the supporting device which can be moved up and down. 5. A flange is provided on the support shaft near the movable frame, a sleeve is provided so as to be fitted on the flange, and a spring is interposed between the sleeve and the movable frame. 2. The bag making and packaging machine according to claim 1, wherein a switch is provided above the sleeve, the switch being biased toward the film roll. 6. A support shaft is provided with a plurality of grip members that protrude and retract in a radial direction, and the grip members protrude outward by the pressure of a fluid supplied to the inside of the support shaft, thereby winding the film roll. The bag making and packaging machine according to claim 1, wherein the tube is gripped from inside.