JP3130762B2 - Packing machine band connect unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packing machine which wraps a band around a packing material and packs the packing material by welding an overlapping portion of the band, and in particular, a band of the packing machine which enables continuous supply of the band. Regarding the connect unit.

[0002]

2. Description of the Related Art A packing machine is known in which a band is wrapped around an object such as a cardboard, an aluminum can, a tire, or the like in a cross shape, parallel shape, or the like. This type of packing machine is also called a banding machine.
Plastic bands such as polypropylene bands and nylon bands having a width of about 6 to 19 mm are used.

In general, a packing machine is configured so that a band of a reel unit is pulled out by a pool unit and fed to a bandway of a gate-shaped bandway unit by a feed unit via a sealing unit. The band sent into the band way makes a round and returns to the sealing unit, the leading end of the band enters the inside of the rear band and is overlapped, and the leading end of the band is clamped to the block of the sealing unit.

For example, when the package is placed on the table and the start switch of the packing machine is pressed so that the center of the package is located immediately below the bandway unit, the feed roller of the feed unit is operated and the band is pulled back. . Then, the bandway opens, the band falls, and is wrapped around the center of the package. Further, the band is tightened by the tension unit. Then, the band is cut leaving the overlapping portion, the overlapping portion of the band is welded by the sealing unit, and the packing operation is completed.

The configuration and operation of the band unit are described in, for example, Japanese Patent Application Laid-Open No. 02-109813 (particularly, in the column of "Prior Art" (page 6, upper left column, line 6 to lower right column, line 15), FIG.

[0006] In brief, the band unit includes a center drum, and a pair of side drums provided on the left and right sides of the center drum. Bands around the paper tube (core material) 1000 ~
A band reel (band coil) is wound around 3000 m, and the band reel (band coil) is inserted into the center drum, surrounded by side drums from both sides, and the band reel is attached to the band unit.

[0007]

[Problems to be Solved by the Invention] A band of 1000 to 3000 m
Even though the wound band reel is used, if the packing machine is continued to be used, the band will eventually disappear and the band reel will need to be replaced.

For example, as shown in Japanese Patent Application Laid-Open No. 02-109813, generally, one side drum is fixed to a unit base via a brake pulley, and a nut handle is screwed to a reel shaft from outside the other side drum. The reel unit is assembled by holding the band reel on the center drum from both sides by a pair of side drums.

To replace the band reel, loosen the nut handle, remove the detachable side drum, remove the empty band reel from the center drum, insert a new band reel through the center drum, and return the side drum. This is done by tightening the nut handle.

Further, it is necessary to pull out the band from the band reel by hand and push the end of the band to a predetermined position of the feed unit, that is, a so-called band passing operation. When the tip of the band is pushed into a predetermined position, for example, a sensor is operated to drive the feed roller, and the band is fed into the bandway of the bandway unit and waits.

The band reel is replaced assuming that the band has run out when the end of the band is separated from the band reel, and the band remaining in the band passage is pulled out and removed.

When the band runs out, the band reel needs to be replaced. During the band reel replacement, the packing machine is stopped and the packing operation is interrupted. The packing operation is not performed independently, but is often performed in a production line, a distribution line, or the like. When the packing machine is stopped to replace the band reel (the packing operation is interrupted). Then, the production line, the distribution line and the like are stopped or interrupted.

Conventionally, only one band reel is prepared, and a new band reel is prepared and replaced after the band runs out, and two operations of replacing the band reel and passing the band are performed each time. ing. The packing work is interrupted due to these operations, and the production line, the distribution line, etc.
An interruption has occurred.

Recently, a packing machine has been known which uses a band drawn out of a band reel without using it immediately, temporarily stores the band in a space called a band pool, and draws out the band pool from the band pool. In this type of packing machine, a band pulled out from a band reel by a band unit is temporarily stored in a band pool, pulled out of the band pool by a feed unit, and sent to the band way. Therefore, even when the end of the band is separated from the band reel, a considerable length of the band remains, and the packing operation can be continued until the band stored in the band pool is used up.

Therefore, in the packing machine provided with the band pool, it is not necessary to interrupt the packing operation when the end of the band separates from the band reel. However, although there is no need to interrupt the packing operation when the end of the band separates from the band reel, it is necessary to replace the band reel sooner or later, and the interruption of the packing operation when replacing the band reel is inevitable.

An object of the present invention is to provide a band connect unit of a packing machine which enables continuous supply of a band.

[0017]

According to the present invention, in order to achieve the above object, at least two band reels in a reel box accommodating the band reels are drawn out of a band reel in use. By detecting the passage of the end of the band by the detecting means, the band reel of the band reel is detected. Further, a double shooter having a plurality of guide grooves arranged in parallel so that a band from the band reel in use and a band from the band reel in standby can be individually inserted is orthogonal to the band feeding direction with respect to the base. A stopper is provided so that any corresponding guide groove can be aligned with the band passage of the base by sliding in the direction, and the guide groove is arranged at a position aligned with the guide groove in which the band is inserted from the waiting band reel. The band is positioned by abutment of the tip on the band.

Then, a clamper for clamping the band from the band reel in use on the band passage of the base, a cutter for cutting the clamped band, and melting and pressing of the overlapping portion of the band overlapping in the vertical direction. Further comprising a controller having a sealing unit for welding between them, and when the detecting means detects that the band reel of the band reel being used has run out of band, the band drawn from the band reel being used is sent to the controller. The band from the waiting band reel is overlapped with the band clamped on the band passage of the base by sliding the double shooter in the corresponding direction in the vertical direction, while clamping and cutting under the operation of The overlapping part is welded by the sealing unit of the controller, For the band that has been pulled out from the band reel, which measure the connection of the band from the band reel waiting.

[0019]

Embodiments of the present invention will be described below in detail with reference to the drawings.

Before describing the band connect unit of the packing machine of the present invention, the continuous band supplying method performed by the band connect unit will first be schematically described here. In this continuous band feeding method, FIG.
As shown in (A), two band reels 11A and 11B are prepared in advance. For example, the upper band reel 11A is used first, and the lower band reel 11B is reserved (spare).

Here, a band is shown for ease of illustration.
Although 11A and 11B are arranged vertically, as described later, in the band connector unit of the embodiment, they are arranged not horizontally but vertically.

First, the band reel 11 used in advance
When the tip of the band 11a of A is pushed to a predetermined position, this is detected by a sensor, and the band is sent to a predetermined standby position by the activation of the pool roller, and this band is used.

While the band 11a is in use, the band 11b of the spare band reel 11B is placed on standby in parallel with the front end of the band 11b. For example, the band 11b is positioned by pushing the tip until it hits the stopper 12.

As shown in FIG. 1B, the band 11 in use is used.
When the end of a is separated from the band reel 11A and the band 11a disappears, for example, the passage of the end is detected by an optical sensor 14 including a light emitting element and a light receiving element, so that the band break of this band is detected. When the band break is detected, the clamper 16 is activated to clamp (fix) the end of the band 11a.

Needless to say, the detection means 14 for detecting the band break from passing through the band end is not limited to the optical sensor, and the band break may be detected by another sensor, for example, a leaf switch.

A packing machine for temporarily storing a band drawn from a band reel in a band pool and pulling the band from the band pool is also known. In this type of packing machine, a considerable length of band remains even when the end of the band separates from the band reel, so even if the end of the band 11a is fixed, it is not necessary to interrupt the packing operation by the packing machine. No, packing can be continued.

After the band 11a is fixed, for example, the movable cutter of the cutter 20, which is a fixed and movable cutter, is advanced to cut (shear) the band. A cut piece of the band 11a (the cutting position, the band between the ends, that is, the optical sensor 1
4, the band between the cutters 20), for example, by sandwiching the cut piece with a pair of rollers (not shown) and rotating the rollers,
It is pulled back and removed as shown by the arrow in FIG. Cut pieces may be removed by suction means, or may be removed manually.

Here, as shown in FIGS. 1B and 1C, the spare band 11b is arranged side by side with the band 11a in use, and the stopper which contacts the tip of the spare band 11b.
12 is located before the cutter 20 (feed direction). Therefore, as can be seen from FIG. 2A, even after the cutting, the overlapping portion 11ab is left at the end of the band 11a in use and at the tip of the spare band 11b.

When the overlapping portion 11ab is welded with a suitable sealing unit 21, the spare band 11b is connected to the band 11a in use, so that the band used for the packing operation is changed from the band 11a to the band 11b. (See FIGS. 2A and 2B).

As the sealing unit 21, a band mounting mechanism (for example, Japanese Utility Model Laid-Open No. 05-046702) which has been widely used for a packing machine can be used.

It is sufficient to detect that the band 11a has disappeared, clamp and cut the band 11a being used, and weld a spare band 11b on the band 11a. Since the spare bands 11b (band reels 11B) are arranged and waited in advance, the old and new two bands 11a and 11b can be connected in a short time (for example, in about 2 seconds), and the bands are continuously supplied. it can.

In this method of connecting the old and new bands, the operation of pulling out the band from the band reel by hand and pushing the end of the band to a predetermined position of the feed unit, that is, the so-called band passing operation, is performed every time the band reel is replaced. Eliminates the need. Also, the replacement of the used band reel may be appropriately performed during the continuation of the packing operation, and the replacement of the band reel does not interrupt the packing operation.

When the band 11b is detected to be out of band, it goes without saying that the processing is performed in the same manner as in the case of the band 11a.

In the embodiment, the case where there are two band reels has been described. However, two or more spare band reels may be provided.

The tip of the band 11b is placed before the expected cutting position of the band 11a (the position of the cutter 20). However, it is sufficient that the stopper is placed at a position where it can be overlapped before connection. For example, as shown in FIG.
Alternatively, the band 11b may be sent forward and applied to the stopper 12 after cutting the band 11a except for the stopper 12 '.

Next, the band connect unit of the present invention
30 will be described. First, the band connect unit 30
In general, as shown in FIG. 3, a plurality of, usually two, band reels 11A and 11B are prepared in advance in a reel box 11 of a packing machine 10, as shown in FIG. 3, for example, the band reel 11A is used first. You.

Below the reel box 11 is a pool box
22, a box 24 for the band connect unit 30 is provided. Band reel 11A Band 11a
Is wound around a series of guide rolls 26 in the reel box 11 and sent to the pool box 22 via the band connect unit 30.

A pool unit is arranged in the pool box 22, and the band unit 11a is pulled out from the band reel 11A by the pool unit and sent to the next sealing unit. Although the pool unit is a well-known one and is not the gist of the present invention, it will not be described in detail.However, a feed roller 28 composed of a pair of rollers is provided at the entrance of the pool box 22, and the band 11a , Sent to a so-called band pool and temporarily stored. Then, the band 11a is sent out from the upper left outlet in FIG. 3 to the sealing unit.

A band (spare band) 11b of another band reel 11B is also guided by a series of guide rollers 26 and guided to a predetermined position of the band connect unit 30.

The detection means 14 detects that the end of the band has separated from the band reel, ie, that the band has run out.
The structure in the reel box 11 is the same as that of the related art except for the point provided with the symbol, and the structure in the reel box (for example, the configuration of the reel unit and the like) is simplified in order to avoid complication of the drawing. ing.

As described above, for example, an optical sensor composed of a light emitting element and a light receiving element is used as the detecting means 14,
The band is provided at a position away from the band reel and at a position close to the band so that band breakage can be detected without delay.

Next, the band connect unit 30 will be described in detail. As shown in FIG. 4 which is a right side view and FIG. 5 which is a front view, the band connect unit is slidable on the base 34 in a horizontal direction. Double shooter 36 provided in
At the entrance.

FIG. 6 is an exploded perspective view in addition to FIGS.
As can be seen clearly, the double shooter 36 is composed of a shooter body 37 and a shooter cover 38 overlaid on the shooter body 37.
With a band 11a in use and a spare band
Guide grooves 39a, 39b for 11b are juxtaposed to the shooter body via another guide groove 39c (in FIG. 6, for ease of understanding, the left side of FIG. 90 °
Clockwise).

The band 11a in use reaches the feed roller 28 (see FIG. 3) of the pool box via the guide groove 39a of the chute main body and the band passage 34a (see FIG. 5) of the base 34, and the pool box is fed by the feed roller. It has been sent to 22 band pools. On the other hand, the spare band 11b in the guide groove 39b stands by with its tip abutting against a stopper 12b beside the band passage 34a of the base 34, and when the band 11a is cut, the double shooter 36 is turned off. The band passage 34a of the base 34 is slid in the direction indicated by the arrow in FIG.
Then, the guide grooves 39b are aligned. The band passage 34a
Is formed by a long groove formed on the surface of the base.

In FIGS. 1 and 2, the case where the bands 11a and 11b are arranged vertically is described. In the band connect unit 30 shown in the embodiment, the bands 11a and 11b are used.
Are arranged side by side, and when a band break is detected, the double shooter 36 is slid so that the bands 11a and 11b can be overlapped.

Two sets of feed rollers 40 for feeding the bands 11a and 11b are provided on the double shooter 36. The two feed rollers 40 have the same configuration, and include a drive roller 40a located above the shooter cover 38 and a touch roller 40b located below the shooter body 37.
A feed roller is configured.

Here, the feed roller 40 is connected to a rotary cylinder 41, and the touch roller 40b is a touch lever.
It is rotatably supported at the center of 42. As can be seen from FIG. 4 in addition to FIG. 5, the lower end of the touch lever 42 is pinned to the side wall 44 of the double shooter 36,
A tension spring 46 is provided between the touch roller 40b and the tension roller 46 to apply a bias force toward the drive roller 40a to the touch roller 40b.

Slots 37a, 38a are formed in the shooter body 37 and the shooter cover 38 along the guide grooves 39a, 39b, respectively. The drive roller 40a is inserted into the slot 38a from above, and the touch roller 40b is inserted into the slot 37a from below. Partially penetrated, bands 11a and 11b between drive roller and touch roller
Sandwich.

Here, a part of the drive roller 40a is notched (see FIGS. 6 and 7), and when setting the bands 11a and 11b, the notch 40a 'is located at a position facing the touch roller 40b. Then, the bands 11a and 11b are inserted into gaps created by the presence of the notches 40a '.

Further, a bolt 42a is screwed to the upper end of the touch lever 42 with its tip abutting on the shooter body 37.
The distance between the touch roller and the drive roller is adjusted by changing the protruding length by screwing the nut to the bolt (see FIG. 4).

Further, an adjuster 48 is provided in the guide groove 39c between the guide grooves 39a and 39b of the band.
It is located through 48c. The adjuster 48 is connected to the piston of the air cylinder 50 on the shooter cover 38, and is slidable in a direction orthogonal to the guide groove 39c in conjunction with the piston. And when you slide,
The guide grooves 39a, 39b are brought into contact with the edges of the bands 11a, 11b and are shifted (positioned).

That is, as shown in FIG. 7A, the bands 11a and 11b are usually located near the center over the edge of the guide groove 39c. Therefore, the adjuster 48 hits the edge of the band and slides with the band, and the adjuster
When the band slides until it hits the edge of 39c, the band is positioned.

As shown in FIG. 4, a guide rail 52 is provided on the upper surface of the base 34, and a slider 54 is mounted on the guide rail. Air cylinder 55
Since the slider 54 is connected to the piston 55a, the slider slides in the paper direction of FIG. 4 (the left-right direction in FIG. 5) by the expansion and contraction of the piston. Further, the double shooter 36 is connected to the slider 54 and is slidable integrally with the slider.

In FIG. 5, the double shooter 36 is at the right position, in which position the left guide groove 39a is positioned on the base band passage 3.
4a and band 11a is used. When the air cylinder 55 is activated and the double shooter 36 is slid to the left as indicated by the dashed line, the right guide groove 38b is aligned with the band passage 34a of the base, and the spare band 11b is switched to the use position. .

Further, as shown in FIGS. 4 and 5, another shooter 56 is disposed below the front of the base 34. This shooter 56 is structurally different from the double shooter 36 in the following points.

The double shooter 36 has two guide grooves 39a,
While the shooter 56 has one guide groove 56
It is a single type having only a (see FIG. 5).

The double shooter 36 is slid in the horizontal direction so that one of the guide grooves 39a and 39b is moved through the band passage of the base.
Align to 34a. On the other hand, the shooter 56 is slidable vertically, and its single guide groove 56a is always aligned with the band passage 34a of the base.

In the shooter 56, it is not necessary to send a band, and a feed roller including a drive roller and a touch roller is omitted. The shooter 56 is provided with a clamper 16 as described later.

The shooter 56 has the same configuration as the double shooter 36 except for the above difference, and as shown in FIG.
The shooter 56 also includes a shooter body 137 and a shooter cover 138, and is provided with an adjuster 148. That is, the guide groove 39b and the long hole are provided in the shooter body 137 and the shooter cover 138.
The adjuster 148 slides in the guide groove 56a to adjust (position) the band in the guide groove 56a.

The adjuster 148 extends through the long hole 138c,
It is connected to a piston of an air cylinder 150 on the shooter 56. The shooter 56 is connected to the air cylinder 15 on the base 34.
5 (see FIG. 4), and is slid vertically along a guide rail (not shown) similar to the guide rail 52 of the double shooter.

As can be seen from FIGS. 4 and 5, another air cylinder 58 is placed upright on the shooter 56. An air cylinder 58 is provided so that the piston is located above the guide groove 56a of the shooter 56, and the clamper 16 is attached to the tip of the piston. The clamper 16 has, for example, a shape having irregularities on its surface, and has an air cylinder 58.
Is activated and the piston extends, the clamper at the tip of the piston presses and clamps the band.

As shown in FIGS. 4 and 5, a slide table 60 is slidably mounted on the base 34 between the double shooter 36 and the shooter 56, and a stopper 62 is provided on the slide table. .

As can be seen from FIG. 9 in addition to FIGS. 4 and 5, the stopper 62 can be moved to a predetermined position by an air cylinder 64 on the slide table 60. That is, the L-shaped connecting plate is attached to the piston 64a of the air cylinder 64.
66 is fixed, and two pins 68 are fixed to the connecting plate, and these pins are inserted through guide holes 70 on the slide table 60 and extend downward. The pin 68 is fixed to another connecting plate 72 below the slide table 60, and the stopper 62 is fixed to this connecting plate.

With this configuration, when the air cylinder 64 is driven and the piston 64a moves forward, the stopper
The reference numeral 62 moves to the right in FIG. 5 below the slide table 60 together with the connecting plate 72, and protrudes across the band passage 34a to prevent the band from running.

The stopper 62 is operated by the air cylinder 64.
At the time when the slide table 60 moves forward and hinders the traveling of the band, the slide table 60 stays at the retracted position shown in FIG. 5, and is slid to the right in FIG. At this position, the band is welded.

As shown in FIG. 5, a band heater 74 is provided on the base 34, facing the slide table 60 with a band passage 34a therebetween, and a driving force is applied to the band cutter by rotation of a cam (not shown). Added to the heater guide
Guided by 75, the band cutter is slid in the band passage direction (left side in the figure).

Further, two band holders 77 and 78 and the cutter 20 are built in the base 34 side by side (see FIG. 4).
As can be seen from FIG. 5, the slide table 60 and the band heater 74 are provided on the base on the side of the base 34, and the band passage is provided.
34a, that is, the band can be moved back and forth in the side direction (lateral direction), while the band holders 77, 78 and the cutter 20 are
It is provided inside 34 and can move forward and backward in the band direction from the lower surface of the band, and slides in a direction crossing the slide table and the band heater.

The band holders 77 and 78 and the cutter 20 can be moved forward and backward by a cam (not shown).
This is merely a known band holder which is replaced by a cutter 20 in place of the rightmost band holder.
The movable slide table 60, the band heater 74, the band holders 77 and 78, and the cutter 20 are all well-known sealing units (heat welding means) widely used in packing machines (one band holder is used). Cutter 20
, Except as described above), and is not described in detail because it is not a main part of the present invention.

For example, Japanese Unexamined Utility Model Publication No. 05-81002 can be cited as an example of this kind of known heat welding means. This seal unit is unitized. Just replace it with 20, and it will be adopted as it is.

The band heater 74 and the band holders 77 and 7
Seal unit consisting of 8 etc., stopper 62, clamper 16
Are provided on the base 34 adjacent to the band passage 34a, and these are collectively referred to as a controller.

According to the packing machine 10 having the above configuration, the front end of the spare band 11b is connected to the rear end (cut end) of the band 11a in use as described below, so that the band can be continuously supplied.

That is, in FIG. 3, the end (end) of the band 11a of the band reel 11A in use is the band reel 11A.
When the optical sensor 14 (band break detecting means) detects the passage of the band end, that is, when the band break is detected by the optical sensor, the air cylinder 58 on the shooter 56 is turned off.
Is driven to lower the piston, and the clamper 16 at the tip of the piston moves the band in the band passage 34a of the base 34.
Clamp 11a (see FIGS. 4 and 5).

FIGS. 10 to 12 schematically show the state of the bands 11a and 11b. Here, FIG. 10 (A) shows a plan view, FIG. 10 (B) shows a side view, and FIG.
2) and (B2), and the double shooter 36 in this case is shown in FIG.
It is in the state of 1).

Here, as shown in FIGS. 3, 5, and 6,
The band 11a in use is the guide groove 39a of the double shooter 36
Through the base band passage 34a. Also, as shown in FIGS. 3 and 6, the band 11b is pulled out from the spare band reel 11B in advance, and is pushed into the guide groove 39b of the double shooter 36 before coming into contact with the stopper 12b. Needless to say. Of course, FIG.
As shown in (A), the drive roller 40a has its notch 40
At the position a ′ is downward, a gap is left between the drive roller and the touch roller 40b that allows the bands 11a and 11b to pass.

After the band 11a is clamped by the clamper 16, the air cylinder 58 is driven to raise the piston to release the clamp.
Is slid in the direction of the double shooter, that is, in the direction indicated by the arrow in FIG. 4 (upward). This is a step for adjusting the length of the overlapping portion of the band, as described later.

Then, the band 11a is narrowed. That is, in FIG. 5, the air cylinders 50 and 150 are driven to retract the piston, and the adjusters 48 and 148 of the double shooter 36 and the shooter 56 are brought into contact with the band 11a to shift (position) the band 11a.

Then, the air cylinder 58 on the shooter 56 is driven again, the piston is lowered, and the band 11a is clamped by the clamper 16 at the tip of the piston. After clamping, the cutter 20 moves to the left in FIG. 4 (moves forward) to cut (shear) the band 11a. In addition, cutter
Prior to cutting by 20, slide table 60 is slid to the right in FIG. 5 to cover the upper surface of band 11a, thereby preventing band 11a from escaping during cutting.

Then, the rotary cylinder 41 is driven, and the corresponding drive roller 40a on the band 11a is rotated counterclockwise by the double shooter 36 when viewed from the right in FIG. Then, a part (cut piece) of the band 11a cut by the cutter 20 and positioned between the cutter and the double shooter 36 is:
It is pinched between the drive roller 40a and the touch roller 40b and pulled back. The drive roller 40a rotates up to 180 °,
By the rotation of the drive roller, the cut pieces of the band 11a are pulled back by a sufficient distance, and the band path 34a of the base is removed.
Be excluded from. Cutting by cutter 20, drive roller
FIG. 10 (B3) shows a state in which the cut piece of the band 11a is removed by 40a.

The air cylinder 55 is driven, and the double shooter 36 is slid to the left as shown by the arrow in FIG. 5 (see FIG. 11 (A4)). Then, by the driving of the air cylinder 64, the stopper 62 is extended to the band passage 34a on the band 11a to block the band passage (see FIGS. 11 (A5) and 11 (B5)). Here, the movement of the stopper 62 and the movement of the double shooter 36 may be simultaneous or, conversely, the stopper 62 may precede.

The double shooter 36 is slid to the left position shown by a dashed line in FIG. 5, and in this left position, the guide groove for standby of the band (spare band) 11b is provided.
39b is aligned with the base band passage 34a.

The air cylinder 50 is driven to extend the piston, and the adjuster 48 is brought into contact with the edge of the band 11b to shift (position) the band 11b (see FIG. 7B). Here, the rest of the band 11a is located on the base 34 from the stopper 62 in the direction of the shooter 56, and the remaining band 11a
Next, the band 11b is aligned.

Then, the rotary cylinder 41 is rotated, and the band 1 is placed between the drive roller 40a and the touch roller 40b.
1b and feed it until it contacts the stopper 62 (Fig. 1
1 (A6), (B6), FIG. 11 (A6) shows before feeding). As can be seen from FIG. 4, since the cutter 20 is located between the stopper 62 and the double shooter 36, the bands 11a and 11b overlap between the cutter 20 and the stopper 62. Here, as shown in FIG. 6, since the guide groove 39b is formed with its left end raised, the tip of the band 11b rises, and the band 11b overlaps the band 11a, and the bands 11a and 11b overlap. You.

In the welding by the band heater 74, the overlapping portions of the bands 11a and 11b are welded and connected with a length substantially equal to the width of the band heater. When the ends of the bands 11a and 11b to be connected, that is, the rear end of the band 11a and the front end of the band 11b are left without forming a welded portion, the band end protrudes from the welded portion. In particular, the tip of the band 11b protruding in the running direction of the band may be caught by another member, making it difficult to run the band or damaging the other member. Therefore, in the present invention, the band is prevented from protruding from the band edge.
The length of the overlapping portion (overlap length) of 11a and 11b is adjusted to secure a certain overlap length.

The overlap length can be adjusted by relatively sliding the bands 11a and 11b.
The overlap length is set to be longer by moving 11a to the band 11b, and the return amount of the band 11a is adjusted to obtain a certain overlap length.

That is, as described above, since the shooter 56 has been slid upward in advance as shown in FIG. 5, the overlapping length of the bands 11a and 11b is set to be relatively large. At this time, the band 11a is still clamped by the clamper 16 at the tip of the piston of the air cylinder 58.

Therefore, by driving the air cylinder 155 and lowering the shooter 56 as shown by the dashed line arrow in FIG.
The band 11a is pulled back in a direction away from the band 11b. As described above, by adjusting the slide length (falling length) of the shooter 56 by the air cylinder 155, the band is adjusted.
The return amount (pull-back length) of 11a is adjusted, whereby a constant overlap length corresponding to the width of the band heater 74 is obtained.

In the embodiment, the overlap length of the bands 11a and 11b is set to a relatively large value in advance, the band 11a is pulled back, and the overlap length is reduced to adjust the overlap length. The overlap length is adjusted by the return amount of the band 11a. The means for performing is only an example, and is not limited to this.

For example, the band 11a can be moved in the direction of the band 11b without setting the overlap length of the bands 11a and 11b large in advance.
May be adjusted, a spare band 11b may be slid instead of the preceding band 11a, or the band may be adjusted.
11a and 11b may be moved away from each other and approach each other. However, in the configuration of the embodiment, the band 11 can be used without complicating the configuration.
There is an advantage that the overlap length of a and 11b can be easily adjusted.

Since the slide table 60 is located above the bands 11a and 11b, the overlapping portion of the bands 11a and 11b is moved forward by the band holder 77 in FIG. (See FIG. 12 (B7)).

The band heater 74 (see FIG. 5) advances and is inserted between the bands 11a and 11b to melt the opposing surfaces of the bands 11a and 11b (see FIGS. 12 (A7) and (B7)). Then, the stopper 62 and the band heater 74 are returned to remove them from the overlapping portion, and then the second band presser 78 is advanced to make the bands 11a, 11b
The bands 11a and 11b are connected by crimping the welded portions (see FIG. 12 (B8)). After that, band holder 77, 7
8. The slide table 60 retreats and returns to the initial position.

Note that the double shooter 36 is slid,
While the band 11b is aligned with the band passage 34a and the welding process is performed, a new band reel 11A is
Set to the left of B. In other words, the tip is the stopper 12a
The band 11a is inserted into the guide groove 39a of the double shooter 36 until the band 11a contacts the band 11b (see FIG. 5).
Wait like. For convenience, FIG. 11 (A6) shows a state in which the tip of the band 11a ′ is pushed in until it comes into contact with the stopper 12a. However, in FIGS. 11A and 11B in which the band 11b is sent until it comes into contact with the stopper 62, the band 1b is actually
1a 'has not been set yet.

As described above, the band connect unit 30
According to the method, the connection of the bands 11a and 11b can be performed in a short time, and continuous supply of the bands can be performed. For example, since a series of band connection operations is automated, it can be performed in about 2 seconds. Therefore, the band can be connected even during the time from when the band breaks up to when the band in the band pool is used up, and by connecting the band before using up the band in the band pool, the packing work is not interrupted. , The band can be supplied continuously.

If no band is stored in the band pool, the packing operation must be interrupted, but the connection of the old and new bands can be performed in a short time, so that the interruption time can be minimized. It does not cause long interruption of packing work such as.

The embodiments described above are for explaining the present invention, and do not limit the present invention in any way.
It goes without saying that all modifications and alterations within the technical scope of the present invention are included in the present invention.

[0095]

As described above, according to the band connect unit of the present invention, the band in use is clamped and cut, and the spare band is overlapped and welded under the slide of the double shooter. Sufficient and spare bands are arranged side by side, so that the new and old two bands can be connected in a short time, and the band can be continuously supplied.

[0096] For this reason, the band can be connected even during the time from when the band breaks up to when the band in the band pool is used up, and the packing operation is interrupted by connecting the band before the band in the band pool is used up. The band can be continuously supplied without causing the band to be supplied.

Since the band is continuously supplied, the band passing operation is not required every time the band reel is replaced.

Further, the band reel may be replaced as needed during the continuation of the packing operation, and the replacement of the band reel does not interrupt the packing operation.

[Brief description of the drawings]

FIG. 1 is a schematic process diagram of a band continuous supply method.

FIG. 2 is a schematic process diagram of a band continuous supply method.

FIG. 3 is a partial schematic view of a packing machine including a band connect unit of the packing machine according to the present invention.

FIG. 4 is a right side view of the band connect unit of the packing machine according to the present invention.

FIG. 5 is a front view of the band connect unit of the packing machine according to the present invention.

FIG. 6 is an exploded perspective view of a double shooter of the band connect unit.

FIG. 7 is a sectional view of a double shooter.

FIG. 8 is a sectional view of a shooter.

FIG. 9 is an exploded perspective view of the slide table.

FIG. 10 is a schematic process diagram of a band continuous supply method by the band connect unit of the packing machine of the present invention.

FIG. 11 is a schematic process diagram of a band continuous supply method by the band connect unit of the packing machine of the present invention.

FIG. 12 is a schematic process diagram of a band continuous supply method by the band connect unit of the packing machine of the present invention.

[Explanation of symbols]

 11A, 11B band reel 11a, 11b band 11ab band overlap 12 stopper 14 sensor (detection means) 16 clamper 20 cutter 21 sealing unit 30 packing machine band connect unit 34 base 34a base band passage 36 double shooter 48 adjuster

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-278709 (JP, A) JP-A 64-14603 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B65B 13/18

Claims (2)

(57) [Claims] 1. A packing machine for wrapping a band drawn from a band reel around a package, welding an overlapping portion of the band and packing the package, wherein at least two bands in a reel box containing the band reel are stored. Detecting means for detecting the passage of the end of the band drawn from the band reel in use of the band reels, and detecting band breakage of the band reel; a base having a groove-shaped band passage; A plurality of guide grooves are provided in parallel so that a band from a band reel in use and a band from a band reel in standby can be individually inserted, and slide in a direction perpendicular to the band feeding direction with respect to the base. And a double shooter for aligning any of the corresponding guide grooves with the band passage of the base; A stopper which is arranged at an alignment position with the groove and which positions the band by contacting the tip of the band; a clamper which clamps the band from the band reel in use on the band passage of the base; A controller having a cutter for cutting; and a sealing unit for melting and pressing the overlapping portions of the bands overlapping in the vertical direction and welding them therebetween, and detecting the band breakage of the band reel in use by the detecting means. When it is detected, the band drawn from the used band reel is clamped and cut under the operation of the controller, and the band being used is clamped on the band passage of the base, and the band is on standby. The band from the band reel is overlapped vertically by sliding the double shooter in the corresponding direction, The band connecting unit of the packing machine, wherein the band from the band reel in standby is connected to the band drawn out from the band reel in use by welding the overlapping portion by the sealing unit of the packing machine. . 2. The band connect unit for a packing machine according to claim 1, wherein an adjuster is provided on the double shooter so as to be slidable between the pair of guide grooves, and the adjuster slides and abuts against the edge of the band to adjust the width.