JP2003112712A - Film tube welding apparatus in automatic packaging machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply and quickly obtain the welding of overlapping portions of packaging films by a necessary length. SOLUTION: A packaging film tube welding apparatus is provided with a film feed unit 40 for feeding packaging films A in the state that both of their side edges are overlapped one another. A heating roller 51 is provided which approaches the front side of overlapping portions of the packaging films A when they are fed, and rotates while sandwiching the overlapping portions between the heating roller 51 and a parts discharge cylinder 7. When the heating roller 51 is brought into contact with the overlapping portions and rotates, it is positioned on the side of the parts discharge cylinder 7 to weld the overlapping portions, and when welding work is finished, it is designed so as to leave the parts discharge cylinder 7. Since the welding apparatus is structured in such a way, a vertical heater having a length corresponding to that of a packaging bag body is not required, and it is unnecessary to make the height of a packaging machine itself high. Further, even in the case where a quantity of parts to be discharged is varied, and accordingly, a bag body is also made shorter or longer in its length, this can simply be adjusted only by varying the feed length of the packaging films, and time of changing arrangements is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic packaging machine for automatically packaging a predetermined number of small parts such as screws, washers, and nuts in a bag body, and a packaging film forming the bag body is a cylinder. The present invention relates to a packaging film tube fusing device that fuses both side edges of overlapping packaging films to form a shape.

[0002]

2. Description of the Related Art Generally, when packing small parts such as screws, washers or nuts in a predetermined quantity in bags, these parts are manually put into a nylon bag and the mouth of the bag is fused by heat. Or the bag body is fitted into the outlet of the component feeder to automate the supply of components, and then the operator takes out the bag body containing the components and binds the mouth. . However, in recent years, in order to reduce the work cost related to this, there has been provided a consistent and automated process from the supply of the number of parts to be packed to the packing. These automatic wrapping machines fold nylon band-shaped wrapping films, fuse them in a bag shape, enclose the contents to form a bag, and print the description indicating the contents on the bag to print the product. It is supposed to be offered as.

Although not shown in the drawings as a widely used automated wrapping machine, a roll of film wound with a belt-shaped wrapping film is arranged at the rear,
There is one in which the packaging film A is supplied by a predetermined length to form a packaging bag. In this case, the packaging bag is made by supplying strip-shaped packaging films by stacking both side edges and fusing them to form a tubular shape, and then fusing the tip of this packaging tube again to form the bottom of the bag. It is supposed to be done. As a bag forming unit which is automated in this work, a structure as shown in FIG. 6 is mainly used.

This is to form a strip-shaped packaging film in the shape of a cylinder around the parts supply cylinder 107, and to surround the parts discharge cylinder 107, a skirt that has a conical shape with a gap therebetween. 130 are arranged. In FIG. 7, the upper portion of the skirt 130 inclines so as to descend from the rear side to the front side, and the packaging film A moves along the skirt 130, enters the gap, and becomes a tubular shape along the component discharge tube 107. . Also, this skirt 1
The front of 30 is overlapped by a predetermined width, and the wrapping film A that is spread and supplied is formed into a tubular shape with its both side edges being overlapped, and is delivered downward in a tubular shape as shown in FIG. It is supposed to be. In this way, after the predetermined length is sent out, the vertical heater 150 at the front is pressed to fuse the overlapping portions. Then, next, the tubular packaging film A is further fed out, and a horizontal heater arranged in a direction crossing the tubular packaging film A is pressed against the tip of the tubular packaging film A to form the bottom of the bag body. Has become.

[0005]

However, when the packaging film thus supplied is formed into a tubular shape, it is necessary to fuse the overlapping portions where the both side edges of the packaging film overlap each other. Therefore, a vertical heater having a length corresponding to the fusion length is prepared in advance, and both side edges of the overlapping packaging films are fused by pressing the longitudinal heater. Longer vertical heaters are required accordingly, and the machine height of the packaging machine itself is high. Also, if the number of parts is changed and the bag becomes shorter or longer than this, this vertical heater must be replaced according to the length of the bag. It takes time. Furthermore, when packaging parts in a small lot, there are problems such as having to prepare several types of vertical heaters according to the lot and increasing the cost in automation.

An object of the present invention is to solve such problems and to easily and quickly obtain fusion of the overlapping portions of the packaging film by a required length.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic packaging in which parts supplied from a parts discharge cylinder 7 by a predetermined amount are put into a cylindrical packaging bag and automatically packed. In the machine, a sending-out section 40 is provided which sends out while keeping both sides of the tubular wrapping film A by a predetermined width and keeping the tubing in a tubular shape. When the wrapping film A is fed to the front of the overlapping portion, A heating roller 51 is provided which rotates in close proximity to the surface of the component discharge cylinder 7 with this overlapping position interposed therebetween. When the heating roller 51 rotates in contact with the overlapping position, the heating roller 51 is positioned on the component discharge cylinder 7 side. To provide a packaging film tube fusing device in which the overlapping portions of the packaging film A are fused by a predetermined length, and when the fusing work is completed, the heating roller 51 is separated from the component discharge tube 7. It is achieved.

Further, in this structure, the heating roller 51
The peripheral surface of the fixed support shaft 52 is capable of moving toward and away from the central axis of the component discharge cylinder 7 and rotatably supporting the central support shaft 52.
This can also be achieved by using a packaging film tube fusing device in which the heater 54 is embedded in the. Furthermore, this heating roller 51
Is reciprocally attached to a piston cylinder 64 through a moving plate 60 that supports the moving plate 60 and the piston cylinder 64 so that the pressing force of the piston cylinder 64 on the component discharge cylinder 7 is within a predetermined pressure. The reliability is further increased by providing the packaging film tube fusing device in which the cushioning member is disposed between the packaging film tube fusion device and the packaging film. In addition, the heating roller 51 in these configurations is a roller that is rotatably supported so as to be rotated by the movement of the packaging film A when it is in contact with the packaging film A, and has a non-slip processed outer periphery. If it is a certain packaging film fusing device, the workability is further improved.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIG.
It will be described with reference to FIG. In FIG. 5, 1 is a screw,
A hopper that stores washers or nuts,
Below the hopper 1, a first vibrating feeder 2 for aligning and supplying the components to be supplied is provided. Below the tip of the first vibrating feeder 2, an alignment feeder 3 for arranging and supplying the components in a single row or a plurality of rows is arranged, and the components are supplied with an interval between the components flowing down through an inclined chute 4. The second vibrating feeder 5 is connected. A component counting unit 6 is provided at the tip of this, and the component counting unit 6 counts the components passing therethrough, and when the set number is reached, the supply of the components is blocked. A component discharge cylinder 7 is connected to the component counting unit 6, and the component counting and supplying unit is constituted by the components from the hopper 1 to the component discharge cylinder 7.

Below the aligning feeder 3, there is provided a film storage / supply section 10 having a film material roll 11 formed by rolling a strip-shaped nylon-made packaging film A having a predetermined width and forming a packaging bag into a roll shape. The packaging film supply unit having the film storage and supply section 10 is roughly divided into the film storage and supply section 10 and a former section 20 for forming the strip-shaped film A into a tubular shape, and the packaging film in the tubular shape. A feeding section 40 for feeding A by a predetermined amount, a vertical sealing section 50 for fusion-sealing both side edges of the packaging film A formed into a tubular shape, and a function control means (not shown) for controlling the operation timing of these. ) And is composed of.

The original film 11 of the film storage / supply unit 10 is supplied by a supply roller 12 which is rotationally driven by a first servomotor 13. When the packaging film A thus supplied is supplied to the front, it is guided to the former section 20. This former part 2
In a packaging film guiding device including 0 and a guide portion 30 provided at the rear portion thereof, as shown in FIGS. 1 to 3, the packaging film A is provided behind the tubular former 21 that constitutes the former portion 20. A guide member 31 that constitutes the guide portion 30 that guides is fixed through a support member 32 so that the tip can be freely moved up and down with the tip as an apex and the tilt can be adjusted. Has become a so-called triangular shape. In addition, as shown in FIGS. 2 and 3, on both side edges of the guide member 31, there are provided attitude adjusting members 33 and 34 along the both side edges and capable of moving in and out of the side edges. By adjusting the position of the packaging film A, the lateral displacement with respect to the supply direction of the packaging film A is adjusted.

On the other hand, a cylinder former 21 is externally fitted around the component discharge cylinder 7 constituting the component count supply unit with a slight gap between the outer peripheral surface and the packaging film A. The cylindrical former 21 is overlapped by a predetermined width such that one outer edge thereof is on the inner side and the other outer edge thereof is on the outer side, and the overlapping portions 22 are configured to form a slight gap therebetween. Moreover, this cylinder former 2
1 is inclined from the rear toward the front toward the overlapping portion 22, and the support member 32 is fixed to the rear portion of the cylinder former 21 along the axis, so that the cylinder homer 21 and the guide member 31 are integrated. Has become.

Further, as shown in FIG. 1, a sending-out portion 40 is arranged in the lower portion of the parts discharging cylinder 7, and the sending-out portion 40 is arranged along the axis lines on both sides of the outer circumference of the parts discharging cylinder 7. A pair of delivery belts 41 that rotate in the delivery direction are arranged and configured. This delivery belt 4
1 is wound so as to circulate between a rotatable main driving pulley 42 and a driven pulley 43, which are spaced apart in the axial direction by a predetermined distance. The drive pulley 42 is driven by a second servo motor 44 (see FIG. 5) which is separately installed.
The servo motor 13 is set to start driving at the same time as or after a slight delay with the start of the packaging film supply operation. The timing adjustment of the drive start of the first and second servomotors 13 and 44 is to prevent the packaging film A from stretching and slackening. Inputs for this control can be set on an operation panel (not shown) for setting the supply and delivery amount of the packaging film A according to the length of these bags.

On the other hand, as shown in FIGS. 1, 3 and 4,
The vertical seal portion 50 is arranged in a direction substantially perpendicular to a plane forming the delivery portion 40 and connecting the delivery belts 41 on both sides of the component discharge tube 7, and the heating roller of the vertical seal portion 50 is disposed. Reference numeral 51 is movable in and out of the parts discharge cylinder 7 in a direction toward and away from the parts discharge cylinder 7. The heating roller 51 is rotatably supported by a fixed support shaft 52 via a heat-resistant bush 53, and the outer periphery of the heating roller 51 is subjected to shot peening or knurling to make the surface rough to prevent slipping. It has been processed. Therefore, the heating roller 51 is configured to rotate when the packaging film A moves while being pressed against the component discharge cylinder 7, and the packaging film A moves downward to heat the overlapping portion. Since the rollers 51 are in contact with each other, this portion is fused. As a result, a tubular packaging bag is obtained. Further, a heater 54 is embedded in a fixed support shaft 52 that rotatably supports the heating roller 51, and heat from the heater 54 is applied to the fixed support shaft 52 and the heat resistant bush 5.
3 is transmitted to the heating roller 51. The heat transmitted to the fixed support shaft 52 is fixed to the fixed support shaft 5.
The temperature is controlled by a sensor 56 that is fixed to the mounting members 55 that support both ends of the two and is in contact with the fixed support shaft 52, and thereby the fusion temperature of the packaging film is controlled.

The mounting member 55 is used for the moving plate 6
The moving plate 60 has two guide shafts 61 arranged in parallel so as to support the horizontal movement of the heating roller 51 at one end thereof. The guide shaft 61 is reciprocally slidably inserted into a slide bearing 63 attached to a fixed plate 62 fixed to a machine base (not shown). The guide shaft 61 is parallel to the guide shaft 61 between the slide bearings 63. The movable plate 60 is movable by a piston cylinder 64 which is arranged so as to be fixed to the fixed plate 62. The piston rod 65 of the piston cylinder 64 is inserted through the moving plate 60.
The tip of the above-mentioned is engaged with the moving plate 60 when the piston rod 65 moves backward. Moreover, a spring body 66 having an elastic force is interposed as a buffer member between the movable plate 60 and the fixed plate 62, and the movable plate 60 moves forward simultaneously with the forward movement of the piston rod 65 by this elastic force. It is like this. The cushioning member may be made of rubber instead of the spring body 66, and may be a member that bends when a predetermined pressure or more is applied when the piston rod 65 advances.

Below the vertical seal portion 50, as shown in FIG. 5, a horizontal seal portion 8 for fusion-sealing the lateral direction of the tubular body formed along the component discharge cylinder 7 is horizontally sealed. A cutter unit 9 for separating the connected bags is arranged, whereby a packaged product containing a predetermined number of components is automatically obtained.

In such a structure, FIG.
Also, as shown in FIG. 2, the packaging film A is manually pulled out along the supply path to guide the packaging film A from the guide unit 30 to the former unit 20.
Put in. At this time, the tip end of the packaging film A is inserted between the component discharge cylinder 7 and the cylinder former 21, and one side edge of the packaging film A is inside the overlapping portion 22 of the cylinder former 21 and the other side edge. And the side edges are overlapped with each other by a predetermined width. In this way, the packaging film A is pulled out to the position of the feeding section 40 along the component discharge tube 7. After this,
The packaging film A is sandwiched by the delivery belts 41 of the delivery portions 40 on both sides of the component discharge tube 7 so that the packaging film A can be delivered.

When a work start signal is input after this state, the packaging film is driven by driving the first servomotor 13 and the second servomotor 44 by an amount corresponding to the preset length of the packaging bag. A is supplied downward by a predetermined length. At this time, since both side edges of the packaging film A are overlapped with each other, the piston cylinder 64 of the vertical seal portion 50 is actuated at the same time as the feeding operation, and the heating roller 51 is moved to the side of the component discharge cylinder 7 to reach this overlapped portion. The heating roller 51 is rotated by the movement of the packaging film A because of the contact. For this reason, the both side edges are continuously fused and bonded, and the packaging film A is sent out in a tubular shape. In this operation, the moving plate 60 is pushed by the spring body 66 and moves to the component discharge cylinder 7 side at the same time as the piston rod 65 moves forward, but the heating roller 51 sandwiches the wrapping film A to the outer periphery of the component discharge cylinder 7. When abutting and reaching a predetermined pressure or more, the spring body 66 bends and an appropriate pressing force is obtained, so that wrinkles and elongation are prevented as much as possible during the delivery of the packaging film A, and a smooth fusion work is performed.

When the feeding portion 40 is stopped after being supplied in this way, the piston rod 65 of the piston cylinder 64 retracts while compressing the spring body 66, and the heating roller 51 moves away from the component discharge cylinder 7. Moving.
On the other hand, when the front end of the packaging film A reaches the lateral sealing portion 8, the lateral sealing portion 8 operates and fuses in the direction crossing the packaging film A. As a result, the bottom of the packaging bag is formed, and subsequently, when a predetermined amount of a component is supplied from the component counting and supplying unit through the component discharge cylinder 7, this component is stored in the bag. When the supply of the predetermined amount of parts is completed, the first and second servomotors 13 and 44 are driven again, the packaging film A is sent out for a predetermined length, and the heating roller 51 of the vertical seal portion 50 causes the part supply cylinder 7 to move. The packaging film A is moved to the side and the overlapping edges of both ends of the packaging film A are fused to form a tubular shape. Then, the transverse sealing portion 8 is again fused and sealed in the transverse direction of the packaging film A, and subsequently, the cutter portion 9 is formed.
As a result, the packaging bag body that has been cut by the lateral seal portion 8 and contains the components is discharged, and a predetermined amount of components is supplied from the component counting and supplying unit to the bag body having the next bottom. The operation of is repeated.

[0020]

As is apparent from the above-described embodiment, the present invention is an automatic packaging machine for automatically packaging a part by placing parts in a packaging bag formed into a tubular shape. A sending-out portion 40 for sending out both side edges of A by a predetermined width is arranged, and when the product is sent out, it approaches the front surface of the overlapping portion of the packaging film A and sandwiches the overlapping portion with the component discharge cylinder 7. When the heating roller 51 is rotated in contact with the overlapping position, the heating roller 51 is located on the side of the component discharge cylinder 7 to fuse the overlapping position of the packaging film A when the heating roller 51 is rotated. The heating roller 51 is separated from the component discharge tube 7 in the packaging film tube fusing device.

Therefore, a vertical heater having a length corresponding to the length of the packaging bag is not required unlike the conventional case, and the height of the packaging machine itself does not increase according to the length of the packaging bag. . In addition, even if the number of parts is changed and the bag becomes shorter or longer than this, it is not necessary to replace the parts of the vertical heater part, and it is easy to change the sending length of the packaging film. The setup time can be shortened. Further, even when the parts are packaged in a small lot, it is not necessary to prepare several kinds of vertical heater parts according to the lot, and the cost for automation can be reduced.

In addition, the heating roller 51 in this structure has a peripheral surface which is movable toward and away from the component discharge cylinder 7, and the heater 5 is attached to a fixed support shaft 52 which rotatably supports the same.
Since 4 is buried, this vertical seal portion can be made relatively small and easy to use. Further, the heating roller 51 is attached to the piston cylinder 64 so as to be capable of reciprocating, and is arranged between the moving plate 60 and the piston cylinder 64 so that the pressing force of the piston cylinder 64 on the component discharge cylinder 7 is within a predetermined pressure. Since the cushioning member is arranged in the above, the pressing force can be made relatively small, and the rotation of the heating roller can be smoothly obtained. In addition, the heating roller 51 is rotatably supported so as to be rotated by the movement of the heating roller 51 when it is in contact with the packaging film A, and the outer periphery of the heating roller 51 has a non-slip process. It can rotate without coming into contact with the product, without wrinkling and stretching on the packaging film. Moreover, since the heating roller continuously rotates, the heating roller does not remain in contact with the same place, and there is no peculiar effect.

[Brief description of drawings]

FIG. 1 is a partial sectional front view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing a schematic configuration part of a former section and a guide section.

FIG. 3 is a plan view of an essential part of FIG. 1 showing a usage state of the present invention.

FIG. 4 is an enlarged plan view of a cross section of a main part of the present invention.

FIG. 5 is a schematic configuration diagram of a parts packaging counter using the present invention.

FIG. 6 is a schematic front view of a main part of a conventional example of the present invention.

FIG. 7 is a perspective view of a former section in a conventional example.

[Explanation of symbols]

1 hopper 2 First vibrating feeder 3 Alignment feeder 4 inclined shoots 5 Second vibrating feeder 6 Parts counter 7 parts discharge tube 8 Horizontal seal part 9 Cutter part 10 Film storage and supply section 11 Film roll 12 Supply roller 13 First servo motor 20 former section 21 Tube former 22 Overlap 30 Guide 31 Guide member 32 Support member 33 Posture adjustment member 34 Posture adjustment member 40 Sending part 41 Sending belt 42 Drive pulley 43 Driven pulley 44 Second servo motor 50 Vertical seal part 51 heating roller 52 Fixed support shaft 53 Heat resistant bush 54 heater 55 Mounting member 56 sensor 60 moving plate 61 Guide shaft 62 Fixed plate 63 Slide bearing 64 piston cylinder 65 piston rod 66 spring body A packaging film

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 3E050 AA02 AB02 BA14 CA02 DC02                       DC09 DD04 DF01 FA01 FA06                       FB01 FB07 GB02                 3E075 AA04 BA42 CA02 DA03 DA14                       DC15 DC35 DC45 DD13 DD33                       DD45 DE25 GA04                 3E094 AA13 BA11 CA10 DA07 EA02                       HA02 HA11

Claims (4)

[Claims] 1. An automatic wrapping machine, which inserts parts supplied from a parts discharge cylinder (7) by a predetermined amount into a packaging bag formed into a cylindrical shape and automatically packs the parts into a cylindrical shape. The feeding section (4) that feeds the packaging film (A) while keeping both sides of the packaging film (A) overlapped by a predetermined width in a tubular shape.
0) is arranged, and a heating roller (51) is provided which comes close to the front surface of the overlapping portion of the packaging film when it is sent out and which rotates with the surface of the component discharge tube with the overlapping portion interposed therebetween. When this heating roller rotates in contact with the overlapping portion, it is located on the component discharge tube side and fuses the overlapping portion of the packaging film for a predetermined length, and when this fusion work is completed, the heating roller will move to the component discharge tube. A packaging film tube fusing device characterized in that it is separated from the wrapping film. 2. A heater (54) is embedded in a fixed support shaft (52) that rotatably supports the peripheral surface of the heating roller with respect to the central axis of the component discharge cylinder. The packaging film tube fusing device according to claim 1, wherein 3. The heating roller is reciprocally attached to a piston cylinder (64) through a moving plate (60) supporting the heating roller, and the pressing force of the piston cylinder against the component discharge cylinder is within a predetermined pressure. The cushioning member is arranged between the moving plate and the piston cylinder so that the above condition is satisfied, and the packaging film tube fusing device according to claim 1 or 2. 4. The heating roller is a roller that is rotatably supported so as to be rotated by the movement of the packaging film when in contact with the packaging film, and has a non-slip outer periphery. The packaging film tube fusing device according to claim 1, 2 or 3.