JPH0531043Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention relates to a band pooling device for a packaging machine that pools band surfaces one above the other.

[Prior art]

As shown in FIG. 3, reference numeral 10 denotes a so-called vertical type fully automatic packaging machine, which is a substantially rectangular box-shaped main body 11 incorporating a control 50 which constitutes various mechanisms for supplying bands, gripping the leading end, pulling back the supply side, tightening, cutting, and gluing the overlapping parts of the bands.
A U-shaped band guide arch 12 is provided at the center of a work table 18 placed on the top surface of the main body 11, spanning both ends in the longitudinal direction, and a band reel 13 is provided on one side of the main body 11 in the longitudinal direction and capable of loading a band coil in a direction perpendicular to the band guide arch 12.
The band guide arch 1 of the main body 11 is provided.
On the side of the same plane as the band reel 13, a pool box 21 holds the coiled band.
The pool box 21 constituting the pool unit 30 is formed in a vertical box shape by facing one surface of a front plate 43, which is a horizontally long rectangular plate material, to a main body outer plate 44 with a gap slightly larger than the band width in parallel, as shown in Fig. 4. Inside the pool box 21, at least
The size is such that a larger amount of band can be accommodated in one package than the amount of band supplied to the band guide arch 12. Reference numeral 14 denotes a back pool, which, like the pool box 21, is a plate material 3 facing the main body outer plate 44 with a gap slightly larger than the band width.
9, the bottom half of which is adjacent to the pool box 21, communicating with the internal space and forming a part of the pool box, and the top half of which faces the rear plate 46 on the outer plate 44 through the gap, and a band outlet 49 is formed facing the tension arm 15 described later. Reference numeral 45 denotes a door cover, which faces a protruding piece 46' of the rear plate 46 by a hinge on the upper side edge of the plate material 39, and is provided so as to be able to open and close the space of said part. In other words, the band outlet 49 is on the extension line of the upper edge of the front plate 43 of the back pool 14 space, and is in the direction perpendicular to the band inlet. The pool feed unit 20 provided on the lower edge of the pool box 21 is configured as shown in FIG. 5, with the drive roller 22 connected to the bearing case 25.
A pulley 3 is connected to the shaft supported by the bearing in the
5)。 The eccentric shaft 24 is connected to a pulley 31 which is connected to a pulley motor (not shown) by a V-belt 32. The idler roller 23 is journalled on an eccentric shaft 24, one end of which is attached with a lever 47 and the other end of which is inserted with an adjuster pin 27. One end of a spring 38 is connected to the lower end of the adjuster pin 27 and the other end of the spring 38 is connected to a spring hook 36 attached to a bearing case 25. The spring 38 constantly rotates the eccentric shaft 24 in a fixed direction (clockwise on the paper in FIG. 5) via the adjuster pin 27, thereby causing the idler roller 23 to slide against the drive roller 22. An angle-shaped balance bar 2
The balance bar 29 is supported so as to be freely movable.
is inserted into the pool box 21. An interlocking rod 28 protrudes from the balance bar 29, and one end of a spring 37 is connected to the tip of the interlocking rod 28, and the other end of the spring 37 is connected to the tip of an adjustment bolt 34. The adjustment bolt 34 is attached so as to be able to move back and forth within a threaded hole in a disk member 35, and the tensile force of the spring 37 which pulls the interlocking rod 28, i.e., the balance bar 29, upward is adjusted according to the movement of the adjustment bolt 34. A limit switch (not shown) is provided on the underside of the bearing case 25 with its reed facing below the tip of the interlocking rod 28. That is, when the tension (waist) of the band in the pool box 21 causes the balance bar 29, i.e., the interlocking rod 28, to swing downward and come into contact with the reed of the limit switch, the pool motor is turned OFF and the drive roller 22 is stopped. Conversely, when the amount of band in the pool box 21 decreases and the balance bar 29, i.e., the interlocking rod 28, swings upward and separates from the reed of the limit switch, the pool motor is turned ON.
5. The tension arm 15 is supported so that the entrance of the band guide groove formed in the upper part of the tension arm 15 faces the opening edge of the band outlet 49 of the back spool 14 when the tension arm 15 is moved (FIG. 1). In a device configured as described above, the band is loaded by releasing the brake of the band reel 13, pulling out the band of the desired length from the band coil of the band reel 13, rotating the lever 47 counterclockwise as shown in FIG. 5, inserting the tip of the band from the pool shooter 26 between the floating roller 23 and the drive roller 22, and filling the gap 5 between the front plate 43 and the plate material 39.
The band is then guided from the tension arm 15 inside the door cover 45 to the outside of the main body, and then passed through a feed unit (FIG. 1) which is made up of a pair of feed rollers 51, 52 which feed the band to the outside of the main body and pull it back.
Since there are no bands pooled yet,
The balance bar 29 is supported by a spring 37.
The idle roller 23 is always biased by the spring 38 so as to be in the position shown by the two-dot chain line in the figure.
2. When the motor power is turned on, the tip of the interlocking rod 28 is separated from the reed of the limit switch (not shown) by the bias of the spring 37, so that the pool motor is turned on and the drive roller 22 rotates. This causes the floating roller 23, which is in sliding contact with the drive roller 22 by the bias of the spring 38, to rotate via the band, which rotates the band reel 13 and feeds the band into the pool box 21, where the band faces are stacked up and down and pooled in the pool box. Then, when the band in the pool box 21 reaches a predetermined amount, the tension (waist) of the band causes the balance bar 29 to rotate.
When the balance bar 2 is moved downward as shown in FIG.
The interlocking rod 28 integral with the limit switch 9 swings counterclockwise as shown in FIG. 5 and comes into contact with the reed of the limit switch. At the same time, the limit motor is turned off.
The supply of the band into the pool box 21 is stopped. Next, the band pooled in the pool box 21 with the band faces overlapping each other is supplied into the guide arch 12. When the amount of band in the pool box 21 decreases, the interlocking rod 28 together with the balance bar 29 is pulled.
5, the limit switch rotates clockwise, and its tip separates from the reed of the limit switch, and this signal turns the pool motor ON again, causing the drive roller 22 and the floating roller 23 to rotate, feeding the band into the pool box 21, and when a predetermined amount of band is pooled, the balance bar 29 is pushed downward again, and the feeding of the band is stopped in the same manner as above. In this way, the above operation is repeated according to the decrease in the amount of band in the pool box 21 by the supply of band to the band guide arch 12, and the amount of band in the pool box 21 is maintained at a predetermined amount. This amount of band pooled is adjusted by the adjustment bolt 34 as described above.
This can be done by appropriately changing the tension of the spring 37, i.e., the timing of the movement of the balance bar 28, by the operation of (a). After being fed to the band guide arch 12, the band is pulled back by the feed rollers 51, 52, and the supply side of the band tightened by the tension arm 15 is pooled in the back pool 14 provided in the main body 11 in a somewhat slack state.

【problem】

The band pool device equipped with the conventional pool amount detection mechanism consisting of the above-mentioned balance bar has a complicated configuration and is troublesome to adjust.In addition, since the drive roller is constantly rotating, the amount of band in the pool box cannot be adjusted. In the past, the band would simply be rubbed between the two rollers, and the balance bar would flap around, which was unpleasant. In addition, because the waveform deformation of the band is irregular due to the weight, hardness, and width of the band, when the position where the band is pooled in the pool box shifts, the band tension or gravity applied to the balance bar may change. Due to the significant difference, the limit switch operation was inaccurate and uncertain, and the pool amount sensing was slow and had a negative impact on the packaging process. Furthermore, the pooled band gradually loses its elasticity and loses the tension that presses the balance bar.
There was a drawback that the pressure for detecting the amount of pooling decreased, causing more bands to be fed and pooled than necessary.

【the purpose】

The purpose of the present invention is to eliminate the drawbacks of the conventional balance bar method described above, to be able to always pool a desired amount of bands without damaging the bands, and to avoid feeding more bands into the pool box than necessary. To provide a band pool device with a simple configuration without a balance bar, which does not cause problems.

[Technical means]

The configuration for achieving the above object of the present invention will be described with reference to the illustrated embodiment.
The feed unit includes a pair of feed rollers 51, 52 that feed a band to a band guide arch 12 attached to the feed unit, a pool box 21 that has a band inlet 48 and an outlet 49 at substantially opposite positions in the vertical direction and pools the band surfaces by stacking them vertically, and a pair of pool rollers 2 that feed the band into the pool box.
In the band pool device having a pool feed unit 20, which is provided with rollers 2 and 23 in the vicinity of the band inlet, and a pool motor for rotating at least one of the pair of rollers is connected to a power source via a timer, any position on the opposing side of the band inlet of the pool box in front of the pair of rollers of the pool feed unit 20 in the band supply direction,
The band outlet 4 of the pool box on the side closer to the rear of the band supply direction of the feed units 51 and 52
In this case, photoelectric switches 40, 40 which emit a light beam are attached at a position on the straight line connecting the first and second rollers 9, where the light beam is interrupted by the band present in the space in front of the pair of rollers of the pool box in the band supply direction, and a signal indicating the absence of the band from the photoelectric switch is input to the timer of the pool motor.

[Effect]

Therefore, in the present invention, by adjusting the set time of the timer according to the amount of band used and/or the mounting position of the photoelectric switch 40, the pool motor can be set to any time specified by the timer based on the band absence signal of the photoelectric switch. The band is rotated for a set time to supply a desired amount of bands to the pool box 21. That is,
There is no band pooled in the pool box 21 with the band surfaces stacked one above the other, in other words, the band is not connected to the band entrance 48 of the pool box.
A signal from a photoelectric switch detects that the desired amount is not greater than a straight line connecting an arbitrary position on the opposite side of the band entrance of the pool box and the exit 49 in front of the pair of pool rollers 22 and 23 in the band supply direction. The rotation time of the driving roller 22 of the pool roller, and therefore the amount of band pooling, is controlled by inputting it to a timer connected to the pool motor.

【Example】

The details of the present invention will be explained below based on the illustrated embodiments. The overall configuration of the packaging machine and the overall configuration of the pool unit are the same as those of the above-mentioned conventional machines, except for the absence of the balance bar 29 and interlocking rod 28 shown in FIG. Since this is the same as the example, the explanation will be omitted. Although the back pool 14 shown in FIG.
The second plate material 54 and 55 are formed into a box shape so as to communicate with the first plate material 54, and a notch 53 for loading a band is provided on the side surface of one of the plate materials 54, and a band outlet 49 is provided at the upper end.
is drilled and substantially identical to that shown in FIG. Figures 1 and 2 show the mounting position of the photoelectric switch 40, and Figure 2A is a switch that detects when the band pool amount is at its shortest and pools a slightly larger amount of bands at once. When the band reaches the shortest pool amount and reaches the state shown by the two-dot chain line in the figure, the light beam shown by the one-dot chain line in the figure is transferred to pool box 2.
The band within 1 no longer cuts off and the photoelectric switch 40
Since the light beam is transmitted or reflected, the absence of the band is detected, and this band absence signal is input to the timer of the pool motor, and the pool roller 22 is driven by the pool motor, which rotates for the time set by the timer. , 23 pulls out the band from the band reel 13 and supplies the band into the pool box 21 in an amount corresponding to the set time of the timer. If the number of rotations of the pool rollers 22, 23 is designed to be higher than the number of rotations of the feed rollers 51, 52, there will be no problem even if the condition shown by the two-dot chain line in the figure occurs while the feed rollers are feeding the band to the outside of the main body. However, with the above method, the photoelectric switch located at the bottom of the pool box may be covered with band cutting waste generated when the band is fed by the pool roller, resulting in malfunction. Ta. Figures 1 and 2B are intended to detect a more appropriate amount of band pool.
0 means that the light beam is connected to the feed units 51 and 52.
They are installed at each of the positions so as to form a straight line connecting the edge of the band outlet 49 of the pool box 21 on the side closer to the rear in the band supply direction and the vicinity of the bottom surface of the left side of the pool box 21. Depending on the type and nature of the band, the condition of the band in the pool box 21 is not always constant, but the condition of the band in the pool box 21 is approximately the same as shown in FIG. By changing to , you can set the pool amount arbitrarily. The operation is similar to that shown in FIGS. 1 and 2A above. The present invention is not limited to the so-called vertical automatic packing machine shown in the illustrated embodiment, as long as the pool box is configured vertically, but can also be applied to a horizontal packing machine in which the packing machine main body and band guide arch are vertically positioned, or It can be applied to various packaging machines, such as those in which a pool unit including a pool box is installed separately from the packaging machine main body.

【effect】

As described above, the present invention can be applied to an arbitrary position on the side opposite to the band entrance of the pool box in front of the pool roller of the vertical pool box in the band supply direction, and to the pool box on the side near the rear of the feed unit in the band supply direction. A photoelectric switch that emits a light beam is installed at a position that is blocked by the band existing in the space in front of the pair of pool rollers in the band supply direction on a straight line connecting the band exits of the pair of pool rollers. Since the input is input to the timer of the pool motor, the disadvantages of the conventional balance bar method can be eliminated, and the desired amount of band can be produced without damaging the band without being affected by band material, thickness, or other band types. Since the band can be pooled and the band can be detected without being affected by band cutting waste that is generated when the band is fed by the pool roller, there is no malfunction and there is no need to feed the band into the pool box more than necessary. , to provide a band pool device with a simple configuration without a balance bar.

[Brief explanation of drawings]

Figure 1 is a perspective view of the main parts, Figures 2A and B are schematic perspective views showing how the photoelectric switch is installed, Figures 3 to 5 show examples of the configuration of a conventional pool unit; 4A and 4B are an overall view and an exploded perspective view of the pool unit, respectively, and FIG. 5 is an exploded view of the pool feed unit. 11...Main body, 12...Band guide arch, 1
3... Band reel, 20... Pool feed unit, 21... Pool box, 22... Drive roller, 23... Idle roller, 24... Eccentric shaft,
30... Pool unit, 40... Photoelectric switch, 48... Band entrance, 49... Band exit,
50...Control unit, 50...Feed unit, 51, 52...Feed roller.

Claims (1)

[Scope of Claim for Utility Model Registration] A feed unit equipped with a pair of feed rollers that feed the band to a band guide arch attached to the main body of the packing machine, and a band outlet and an inlet located at substantially vertically opposed positions, and the band is stacked vertically so that the band is stacked vertically. A pool box for pooling and a pair of pool rollers for supplying bands into the pool box are provided near the band entrance, and a pool motor for rotationally driving at least one of the pair of pool rollers is connected to a power source via a timer. In a band pool apparatus having a pool feed unit, the band pooling apparatus has the following steps: at an arbitrary position in front of the pair of pool rollers in the band supply direction and on the side opposite to the band entrance of the pool box, and at a side near the rear of the feed unit in the band supply direction. A photoelectric switch that emits a light beam is installed at a position blocked by a band existing in a space in front of the pair of pool rollers in the band supply direction on a straight line connecting the band exits of the pool box, and the band of this photoelectric switch is absent. A band pool device for a packaging machine, characterized in that a signal is input to a timer of the pool motor.