JP3710773B2 - Device for supplying a specified amount of packaging film in an automatic parts packaging machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an automatic parts packaging machine for automatically packaging small parts such as screws, washers or nuts into a bag body in a predetermined quantity, and packaging for automatically supplying a packaging film for forming a bag body repeatedly at a predetermined length. The present invention relates to an apparatus for supplying a predetermined amount of film.
[0002]
[Prior art]
In general, when packing a small number of small parts such as screws, washers or nuts into a bag, the parts are put into a nylon bag by hand, and the mouth of the bag is fused by heat to bind it. Alternatively, after the bag body is fitted into the discharge port of the component feeder and the supply of the components is automated, the operator takes out the bag body containing the components and binds the mouth. However, recently, there has been provided a system that consistently automates everything from the supply of parts to be packed to the bagging because of the necessity of reducing the work cost. These automatic wrapping machines fold a nylon belt-shaped packaging film and fuse it into a bag shape, and then fuse it across the length direction to form a bag body. After the description to be displayed is printed, the contents are enclosed and provided.
[0003]
A roll of a belt-shaped packaging film is placed on the back of such a popular automated packaging machine, and the supply roller is driven by driving a motor for feeding the packaging film. In some cases, a predetermined length is supplied. This is one in which the packaging film is supplied in synchronization with the raw material supply motor and the feed motor arranged in front of the motor, and the packaging film A is driven by a preset driving amount of these motors. The length of is determined. Then, as shown in FIG. 7, the packaging film A is wrapped around the parts discharge cylinder 107 to which the parts are supplied, and the delivery belt 131 is rotated by the rotation of the delivery motor 152 while maintaining this state. Thus, a predetermined amount of the packaging film A is sent out. In this state, the heating roller 161 subsequently approaches the component discharge cylinder 107 and fuses the overlapping portion of the film while the film A is being sent out.
[0004]
[Problems to be solved by the invention]
However, when the packaging film is repeatedly supplied in a fixed amount in this way, the packaging film wound in this predetermined thickness prevents the static electricity from being generated and adsorbed to each other. As the wax is attached, initially, a predetermined amount is supplied without slipping on the delivery belt or the supply roller, but when this is repeated, the wax attached to the packaging film is applied to the delivery belt or the supply roller. Since slippage occurs due to adhesion, the actual supply amount is reduced with respect to a preset supply amount. Further, in order to solve this problem, it has been necessary to periodically replace or clean the feeding belt or the supply roller. Furthermore, since these feeding belts or supply rollers are arranged on both sides of the part discharge cylinder, the packaging film is supplied obliquely if any slippage occurs on one side, and thereby the cylindrical packaging The number of overlapping portions of the film is reduced, or on the contrary, the overlapping amount of the uniform width is not obtained. Moreover, since the film supply motor that supplies the film and the feed motor are synchronized, if the slip occurs, the film will become slack, so that the film contacts the machine. Problems such as contamination and tearing.
[0005]
SUMMARY OF THE INVENTION An object of the present invention is to provide a predetermined amount supply device for a packaging film which can solve such problems and can obtain a set supply amount accurately and stably in the supply of the packaging film.
[0006]
[Means for Solving the Problems]
An object of the present invention is to form a wrapping film A supplied from a film storage and supply unit 10 in a cylindrical shape, and a drawer unit for pulling out a predetermined amount of the wrapping film A in conjunction with the film storage and supply unit 10 30, an automatic parts packaging machine that forms a bag by binding the lower end of a predetermined length of packaging film A, and is arranged on both sides with the parts discharge cylinder 7 penetrating the former part 20, and the inner surface is a part. A pair of suction portions 31 that have a shape along the outer peripheral surface of the discharge cylinder 7 and have a plurality of air holes 33 for sucking air when the inner peripheral surface contacts the outer peripheral surface of the component discharge cylinder 7 ; wherein across the center line of the component discharge tube 7 opposite and the suction unit 31 to the distal end of the arm member 41 is moved the suction portion 31 in the direction direction or away in contact with the component discharge tube 7 takes The movable block 43 is kicked disposed for free horizontal movement along the arm member 41, a holding operation unit 40 of the structure for supporting the both sides of the movable block 43 is elastically urged, the holding operation unit 40 This is achieved by providing a predetermined amount supply device for the packaging film that constitutes the drawer unit 30 from the raising / lowering portion 50 that moves by a predetermined amount along the component discharge cylinder 7.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS. In FIG. 6, reference numeral 1 denotes a hopper for storing parts such as screws, washers or nuts. Below the hopper 1, a first vibration feeder 2 for aligning and supplying parts to be supplied is provided. An alignment feeder 3 for supplying parts in a row or in a plurality of rows is arranged below the front end of the first vibration feeder 2, and is supplied with a gap between the parts flowing down through the inclined chute 4. A second vibration feeder 5 is connected. A component counting unit 6 is provided at the tip of the component, and the components passing through the component counting unit 6 are counted by the component counting unit 6, and when the set number is reached, the supply of components is blocked. A component discharge cylinder 7 is connected to the component counting section 6, and a component counting supply section is composed of components from the hopper 1 to the component discharge cylinder 7.
[0008]
Also, below the alignment feeder 3, a film storage and supply unit 10 is provided which is wound with a raw film 11 in which a belt-shaped nylon packaging film A having a predetermined width forming a packaging bag is wound in a roll shape. And the predetermined amount supply apparatus of the packaging film which has this film storage supply part 10 is divided into the former part 20 which forms the said strip | belt-shaped film A into a cylinder shape roughly divided except the film storage supply part 10, and this cylinder shape. A drawer unit 30 that draws out the packaging film A by a predetermined set amount, a vertical seal portion 60 that seals both side edges of the tubular film A, and function control means (not shown) for controlling the operation timing thereof. ).
[0009]
The film stock 11 wound in a roll shape in the film storage and supply unit 10 is supplied by a supply roller 12 that supplies the packaging film A while supporting the film, and the supply roller 12 is a first servo. The motor 13 is rotationally driven. A film tension correction unit 70 is disposed in front of the film storage and supply unit 10 so that the packaging film A fed forward is not slack or has a certain tension. As shown in FIG. 4, the film tension correcting unit 70 has a tension adjusting rod 71 that moves up and down during supply of the packaging film A so as to constantly apply tension to the packaging film A by its own weight. A disk-shaped signal operation plate 73 that is fixed and moves up and down integrally acts on sensors 74 arranged above and below the guide plate 72 so that the looseness of the packaging film A is detected. Thereby, at the time of the next packaging film supply, the supply roller 12 of the film storage and supply unit 10 shown in FIG. 6 is set to rotate so as to supply a little more packaging film A forward or less than the set amount. Yes. The guide plate 72 is fixed to a frame (not shown) of the automatic packaging machine.
[0010]
When the packaging film A supplied in this way is supplied forward, it is guided to the former unit 20. As shown in FIG. 5, a guide member 14 for guiding the wrapping film A is fixed to the former section 20 so that the angle thereof can be adjusted. The guide member 14 is a triangle having a rearward spread. It has a shape. On the other hand, as shown in FIG. 1, a cylinder former 21 is extrapolated around the parts discharge cylinder 7 constituting the parts counting supply section 6 with a slight gap between the parts discharge cylinder 7 and the outer peripheral surface. The cylinder former 21 is overlapped by a predetermined width so that one of the outer edges is on the inside and the other is on the outside, and a slight gap is formed at the overlapping portion. In addition, the upper end of the tube former 21 is inclined so as to descend from the rear to the front toward the overlapping portion.
[0011]
Further, a drawer unit 30 for pulling out the packaging film A by a set amount is arranged at the lower part of the component discharge cylinder 7, and this drawer unit 30 is an inner surface along the outer periphery of the component discharge cylinder 7 as shown in FIG. A suction part 31 having a position, and a holding operation part 40 that moves the suction part 31 in a direction perpendicular to the component discharge cylinder 7 and moves the suction part 31 in a direction in contact with or away from the component discharge cylinder 7; The holding operation unit 40 is composed of an elevating unit 50 that moves up and down to move the nipping operation unit 40 along the component discharge cylinder 7 by a predetermined amount. The suction part 31 is a pair located on both sides of the center line of the component discharge cylinder 7 penetrating the former part 20, and as shown in FIG. Is a semicircular shape along the outer peripheral surface of the component discharge cylinder 7, and an elastic body 32 such as rubber or urethane resin is attached thereto. A plurality of air holes 33 each having an opening formed in the inner peripheral surface are formed in the suction portion 31 at predetermined intervals. The air holes 33 are collectively provided at the upper portion of the suction portion 31. The suction pipe 34 communicated with suction means (not shown). Thereby, when the inner peripheral surface of the suction part 31 contacts the outer peripheral surface of the component discharge cylinder 7, air is sucked from the opening of the air hole 33. The surrounding packaging film A is adsorbed and moved downward, and the packaging film A is drawn downward by a predetermined amount. For this reason, reliable film supply is obtained.
[0012]
On the other hand, as shown in FIG. 1, the holding operation unit 40 has a movable block that is guided by a guide shaft 42 disposed along the axial direction at the tip of an arm material 41 constituting the holding operation portion 40 and can move horizontally. 43 is provided, and the movable block 43 is elastically biased and supported by compression springs 44 disposed on both sides thereof. In addition, a support plate 45 is fixed to the movable block 43, and in order to make the suction portion 31 uniformly contact the support plate 45 with respect to the component discharge cylinder 7, the inner surface of the suction portion 31 and the components are preliminarily provided. A knob 35 is attached for fine adjustment by turning the distance from the center of the discharge cylinder 7. With these configurations, even if the suction portion 31 is displaced in the horizontal direction with respect to the center of the component discharge cylinder 7, the adsorption portion 31 can absorb this shift and is applied to the packaging film A on the outer peripheral surface of the component discharge cylinder 7. It becomes possible for the adsorption | suction part 31 to contact uniformly.
[0013]
Further, the rear ends of the pair of arm members 41 that respectively support the suction portions 31 on both sides of the component discharge cylinder 7 are approached or separated from each other along a horizontal guide rail 47 that is fixed to the mounting base 46 horizontally. A support member 48 that is movable in a moving direction is fixed, and both ends of the piston cylinder 49 are fixed between the pair of arm members 41 and 41 as shown in FIG. As a result, when the piston cylinder 49 contracts or expands, the suction portion 31 moves in a direction in contact with or away from the component discharge cylinder side. In addition, the mounting base 46 is arranged parallel to the component discharge cylinder 7 and can be moved up and down along a vertical guide rail 51 constituting the lifting and lowering portion 50. The vertical guide rail 51 is a frame of the packaging machine (see FIG. It is fixed integrally with the fixing plate 8 which is fixed to (not shown). A second servo motor 52 that drives the mounting base 46 up and down is fixed to the fixed plate 8. A pinion 55 is fixed to the motor shaft 53 of the second servo motor 52 so as to mesh with a rack 54 fixed to the mounting base 46 along the vertical guide rail 51. By rotating the pinion 55 forward and backward, The mounting base 46 to which 54 is fixed is moved up and down. The second servomotor 52 is set so that the packaging film A does not become tensioned at the same time as or slightly after the start of the packaging film supply operation of the first servomotor 13.
[0014]
On the other hand, as shown in FIGS. 1 and 2, the vertical seal portion 60 can move so as to be pressed against the component discharge cylinder 7, and the heating roller 61 rotates while sandwiching the packaging film A when the packaging film A is pulled out. When the packaging film A moves downward, the overlapping portion is fused. Thereby, it becomes a cylindrical packaging bag body. Further, a pressing member 9 is provided directly below the heating roller 61 so as to be able to protrude so as to press and support the packaging film A pulled out by a set stroke of the drawer unit 30 at that position. The package film A drawn out is pressed and supported. If the amount of the wrapping film A to be pulled out is long, it is necessary to pull out the wrapping film A further. The bag length is increased by repeating the work. Further, as shown in FIG. 6, below the component discharge cylinder 7, a lateral seal portion 62 for sealing the lateral direction of the bag body and a cutter portion 63 for separating the laterally sealed bag body are arranged. Thus, a packaged product in which a predetermined number of parts are stored is automatically obtained.
[0015]
In the apparatus for supplying a predetermined amount of the packaging film configured as described above, the packaging film A is manually pulled out along the supply path and placed in the former section 20 as shown in FIGS. 1 and 5 in advance. At this time, the end of the front end of the packaging film A is put between the component discharge cylinder 7 and the cylinder former 21, one side edge of the packaging film A is inside the overlapping portion of the cylinder former 21, and the other side edge is outside. Then, the side edges of each other are overlapped by a predetermined width. After that, the packaging film A is pulled out to the position of the drawer unit 30 along the component discharge cylinder 7. Thereafter, the packaging film A is sandwiched between the suction portions 31 of the drawer units 30 on both sides of the component discharge cylinder 7 so that it can be pulled out.
[0016]
When a start signal for starting the operation is received, the packaging film A is supplied by driving the first servo motor 13 by a set amount corresponding to a preset length of the packaging bag body. Further, since the air has already been sucked from the air holes 33 of the suction portion 31 and the packaging film is sucked, the second servo motor 52 is also driven at the same time as or slightly behind the driving of the first servo motor 13. The packaging film A is drawn downward by a predetermined length. At this time, since both side edges of the packaging film A are overlapped with each other, the vertical seal portion 60 shown in FIG. 1 is moved to the component discharge cylinder 7 side simultaneously with the drawing operation, and the heating roller 61 comes into contact with the overlapping portion. The wrapping film A is supplied in the form of a cylinder while fusing both side edges.
[0017]
Thereafter, when the leading edge of the packaging film A reaches the lateral seal portion 62, the lateral seal portion 62 is actuated to fuse the direction crossing the packaging film A. After the bottom of the packaging bag body is formed in this way, a predetermined amount of components are supplied from the component counting section 6 via the component discharge cylinder 7 and stored in the bag body. At this time, since the pressing member 9 protrudes and presses the overlapping portion of the packaging film A, the drawer unit 30 is raised by the reverse rotation of the second servo motor 52 with the suction portion 31 opened and returns to the original position. On the other hand, when the supply of parts is completed in this way, the pressing member 9 is retracted, and the first and second servo motors 13 and 52 are driven again, and the packaging film A is pulled out by a predetermined length, and the vertical seal portion 60 is driven. Thus, the overlapping of both end edges of the packaging film A is fused to form a cylinder. Then, the packaging bag A in which the transverse direction of the packaging film A is fused and sealed by the lateral seal portion 62 shown in FIG. 6 and subsequently cut by the lateral seal portion 62 by the cutter portion 63 to store the parts. Is discharged, and a predetermined amount of components are supplied from the component counting unit 6 to the bag body in which the next bottom is formed, and the above operation is repeated.
[0018]
A product in which parts are supplied to a bag of a predetermined length is obtained by repeating such an operation. When the bag length is longer than the set stroke of the drawer unit 30, the movement of the drawer unit 30 is performed. Can be easily handled by making the stroke of the movement of the drawer unit 30 twice as long as it is one stroke or more, for example, a bag length that is twice the standard bag length.
[0019]
【The invention's effect】
As is clear from the embodiment described above, the present invention forms a cylindrical form of the packaging film A supplied from the film storage and supply unit 10, and the former and the film storage and supply unit 10. In an automatic component packaging machine that includes a drawer unit 30 that draws a predetermined amount of the packaging film A and binds the lower end of the packaging film A having a predetermined length to form a bag body, on both sides of the component discharge cylinder 7 that penetrates the former portion 20. A pair of adsorbing portions 31 having a plurality of air holes 33 that are arranged and whose inner surface is shaped along the component discharge cylinder 7 and whose inner peripheral surface is in contact with the outer peripheral surface of the component discharge cylinder 7 ; , the movable suction unit 31 to the distal end of the arm member 41 moves the suction unit 31 across the component discharge tube 7 in opposing and direction direction or away contacting thereto is attached Bro Provided click 43 to be freely moved horizontally along the arm member 41, a holding operation unit 40 of the structure for supporting the both sides of the movable block 43 is elastically urged, along the holding operation unit 40 to the component discharge tube 7 This is a device for supplying a predetermined amount of packaging film, which constitutes the drawer unit 30 from the moving up and down unit 50 to be moved.
[0020]
For this reason, even if the bagging operation of parts is repeated, the wax as an adsorption preventing material that keeps the preset supply length of the packaging film always constant and prevents mutual adsorption by the action of static electricity. Even if it adheres to the packaging film, it can always be pulled out by a fixed amount regardless of this. In addition, this allows the crossing of the side edges of the packaging film to be maintained at a constant width, reducing maintenance and inspection work. Furthermore, by simply synchronizing the first servo motor for supplying the original fabric and the second servo motor of the drawer unit, the packaging film can be pulled out by a predetermined amount without causing any extreme loosening or stretching of the packaging film. This makes it possible to obtain a stable packaging process for parts and to prevent the film from coming into contact with the machine or being caught and torn.
[0021]
In addition, since the packaging film suction portion in this configuration has a plurality of air holes 33 for sucking air, the packaging film can be reliably suctioned and pulled out with a uniform force at all times. Further, the holding operation unit according to the present invention allows the movable block 43 to which the suction unit 31 is attached to be horizontally movable, and elastically biases both sides of the movable block 43, so that this suction is performed with respect to the center of the component discharge cylinder. It can move in the horizontal direction so that the inner surface of the part is always at the same center , and can flexibly cope with the shift of the suction position of the packaging film. This eliminates the need for precise fine adjustment before work, shortens the time required for setup adjustment, and provides special effects such as eliminating the skill of the operator.
[Brief description of the drawings]
FIG. 1 is an enlarged front view of a principal part showing an embodiment of the present invention.
2 is a fragmentary plan view of FIG. 1; FIG.
FIG. 3 is an enlarged perspective view of a suction portion.
FIG. 4 is an enlarged view of a main part showing a tension correction part of the packaging film.
FIG. 5 is a perspective view showing a former part of a parts packaging machine.
FIG. 6 is a schematic configuration diagram of a parts packaging machine showing an embodiment of the present invention.
FIG. 7 is a front view of an essential part showing a conventional example of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Hopper 2 1st vibration feeder 3 Alignment feeder 4 Inclination chute 5 2nd vibration feeder 6 Parts counting part 7 Parts discharge cylinder 8 Fixing plate 9 Holding member 10 Film storage supply part 11 Original film 12 Supply roller 13 First servo motor 14 Guide member 20 Former part 21 Cylinder former 30 Drawer unit 31 Suction part 32 Elastic body 33 Air hole 34 Suction pipe 35 Knob 40 Pinch operation part 41 Arm material 42 Guide shaft 43 Movable block 44 Compression spring 45 Support plate 46 Mounting base 47 Horizontal Guide rail 48 Support member 49 Piston cylinder 50 Elevating part 51 Vertical guide rail 52 Second servo motor 53 Motor shaft 54 Rack 55 Pinion 60 Vertical seal part 61 Heating roller 62 Horizontal seal part 63 Cutter part 70 Film tension correction part 71 Tension adjustment Rod 72 Guide plate 73 Signal Operation plate 74 Sensor A Packaging film

Claims (1)

From a former part (20) for forming the packaging film supplied from the film storage and supply part (10) into a cylindrical shape, and a drawer unit (30) for pulling out a predetermined amount of the cylindrical packaging film in conjunction with the film storage and supply part In the automatic parts packaging machine that forms the bag body by binding the lower end of the packaging film of a predetermined length,
It is arranged on both sides with the component discharge cylinder (7) penetrating the former part, and the inner surface is shaped along the outer peripheral surface of the component discharge cylinder, and the inner peripheral surface is in contact with the outer peripheral surface of the component discharge cylinder. sometimes a pair of suction portion having a plurality of air holes (33) for sucking the air (31), the suction in the opposite and the component discharge tube direction or away direction in contact with the sides of the center line of the component discharge tube A movable block (43) having the suction portion attached to the tip of the arm member (41) is provided so as to move horizontally along the arm member, and both sides of the movable block are elastically energized and supported. a holding operation unit configured to (40), the packaging film, characterized by being configured the drawer unit from the holding operation section elevation motion unit for moving a predetermined amount along the component discharge tube (50) Quantitative supply device.

Images