JPH04253608A - Banding machine in packing machine - Google Patents

Abstract

PURPOSE:To automatically and securely guide a band into the band-feeding and tightening mechanism of a packing machine and also automatically pool the band in a pool box without causing jamming in the path of the band of the packing machine when the band is inserted from the band inlet of the pool box. CONSTITUTION:A band guide path 53 in which guide plates 51 are arranged oppositely via a band-passing clearance at the band-guide back face plate 52, is provided to connect the pool roller equipped at the band inlet to the band outlet, in the pool box 30 provided with the band inlet and outlet. The guide plate 51 is provided at the original position forming the band-guide path 53 to be freely reciprocal and to rotatably interlock with a rotary solenoid 56. On fitting the band, the guide plate 51 is moved forward to the original position to form the band guide path 53. When the band passes through the band- tightening mechanism, the guide plate moves back to open the band guide path 53 and then the band is pooled in the pool box 30.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a band loading device for a packing machine that easily loads a band onto a feed roller serving as a band feeding mechanism and feeds the band into a pool box.

0002

2. Description of the Related Art Conventional band loading devices include Japanese Patent Publication No. 59-5494 and Utility Model Application Publication No. 60-92904 which attempts to simplify the system based on this. As shown in the main part, band insertion slot 4
a, a pool box 4 having a band delivery port 4b, a pool roller 5 for feeding the band into the band insertion port 4a, and a band guide arch erected parallel to the longitudinal direction of the packaging machine body from the band creation port 4b. a feed roller 7 that feeds the band 1 into the band guide arch and pulls the band back from the band guide arch to tighten it; 3, and can be raised to a position along the back wall 9 of the pool box 4, and in this upright position, a band is inserted between the band insertion port 4a and the band outlet port 4b between the inner surface of the back wall 9 of the pool box 4. There is a band loading device for a packing machine that includes a band tensioning device consisting of a feed roller 7 and a band guide plate 8 forming a band guide path 6 leading to the band guide plate 8 .

0003

[Problems to be Solved by the Invention] In the conventional band loading device for a packing machine, although the purpose of band loading can be achieved in the conventional example shown in FIGS. The band 1 fed by the pool roller 5 is made to circulate within the band guide arch on the packing machine main body via the feed roller 7 at a circumferential speed equal to or greater than the circumferential speed of the feed roller 7, and at this point the handle is turned. The feed roller 7 is rotated to turn the band guide plate 8 upside down and pool the band 1 in the pool box 4, but the feed roller 7 is designed to rotate an extremely heavy band coil and pull out the band 1, so it has a high height. The circumferential speed is considerably lower than that of the feed roller 7, which requires torque and therefore has a low speed, and rotates at a low torque and high speed due to high-speed packaging requirements. Therefore, if the circumferential speeds of both rollers are made the same, the circumferential speed of the feed roller 7 will be reduced, and packaging efficiency will have to be sacrificed.

Furthermore, there is no means for detecting the completion of the band loading, and it takes time and effort for the operator to lay down the band guide plate 8 after confirming the completion of band loading. It is difficult to lower the guide plate 8, and if the lowering of the band guide plate 8 is delayed, the band 1 will jam in the band passage from the feed roller 7 to the slide table, which will hinder the band pullback and the next band supply. There was a problem with coming.

[0005]Furthermore, while the packing machine is in use, the band guide plate 8 is usually laid down, and when all the bands of the band coil are used, band jams and other troubles occur in the band passing path of the packing machine. At that time, load a new band of band coil into the band guide arch of the packing machine. To do this, the band guide plate 8 is raised along the rear wall 9 to form a band guide path, and the band tip of the band coil is inserted between the pair of pool rollers 5, but some workers may accidentally The band guide plate 8
If the tip of the band coil is inserted into the pool roller 5 without standing up, the band will not be loaded into the band guide arch and will be fed a predetermined amount into the pool box. There was a problem in that the relatively long band had to be pulled back again and the band loading operation had to be repeated, which was very time consuming.

The present invention was developed to solve the above-mentioned problems, and when the band is fed by the pool roller, the guide plate advances to the original position and the connection between the pool roller and the band supply tightening mechanism is made. A band guide path is automatically formed in between, and when the band passes through the band supply tightening mechanism,
The guide plate retreats from its original position to open the band guide path, and the inertia of the pool roller causes the excess band to be fed in after band loading, preventing jams in the band passage path from the pool roller to the feed roller to the band welding mechanism. It is an object of the present invention to provide a band loading device that does not cause any problems, does not require much effort on the part of a worker, and has high work efficiency.

[0007]

[Means for Solving the Problems] In order to achieve the above object, the band loading device for a packing machine of the present invention feeds the band from the inlet 33 into a pool box 30 having an outlet 32 and an inlet 33 for the band. A band that has a pair of pool rollers consisting of a pool feed roller 35 and a pool touch roller 36 that is attached to the pool feed roller 35 so as to be able to come into contact with and separate from the pool feed roller 35, and that feeds the band out of the main body and tightens the band against the object to be packed. A supply tightening mechanism 60 and a band welding mechanism 70 for welding the band overlapping portion are provided, and the band supply tightening mechanism 60 and the band outlet 32 of the pool box 30 are communicated via a guide shooter 59. In the pool box 30, a band guide path 53 communicates between the band passing path between the pair of pool rollers 75 and the band outlet 32. This band guide path 53 is a band passage path formed by making a guide plate face the band guide back plate 52 with a band passage gap in between, and one longitudinal edge of the guide plate 51 is connected to one side wall of the pool box 30. The position where the guide plate 51 is rotatable in a direction orthogonal to the longitudinal direction of the part and where the guide plate 51 faces the band guide back plate 52 to form the band guide path 53 (hereinafter referred to as " (referred to as "original position") so that it can move forward and backward at will. Further, the guide plate 51 is moved in conjunction with an opening/closing crank 44 fixed to a rod 58 of a rotary solenoid 56 serving as rotational driving means of the section.
The guide plate 51 is rotatably provided by the rotation of the guide plate 51. For example, the guide plate 51 is biased via the spring 25 in the direction of retreating from the original position (the position indicated by the solid line in FIG. 2) or moving forward to the original position, and the opening/closing crank 44 fixed to the rod 58 of the rotary solenoid 56 is activated. The tip of the opening/closing crank 44 is brought into contact with and engaged with the guide plate 51 at the front in the urging direction in which the guide plate 51 retreats from the original position or in the forward direction in the urging direction in which the guide plate 51 advances toward the original position. It can be linked. Furthermore, a pool feed detection means 49 detects that the pool touch roller 36 is in pressure contact with the pool feed roller 35 and detects that the pair of pool rollers 35 and 36 start feeding the band; A band passage detection means 62 is provided to detect that the band has passed through the band supply tightening mechanism 60, and the pool feed detection means 4
9 and the band passage detection means 62, the rotary solenoid 56 is operable.

[0008] Furthermore, one back wall of the pool box 30 can be used as the band guide back plate 52.

Furthermore, the pool touch roller 36 is eccentrically supported, a handle lever 28 is fixed to the eccentric shaft of the pool touch roller 36, and the rotation of the handle lever 28 is detected on the rotation trajectory of the handle lever 28. Pool feed detection means, such as a limit switch or a reed switch, detects that the pool touch roller 36 is in pressure contact with the pool feed roller 35, and detects that the pair of pool rollers 35, 36 start feeding the band. 49
can be provided.

0010

[Operation] A pair of pool rollers 35 of the pool box 30
, 36 and rotate the handle lever 28, the limit switch 49 generates a detection signal that detects that the pool touch roller 36 of the pool roller is in pressure contact with the pool feed roller 35, and this detection signal As a result, the opening/closing crank 44 fixed to the rod 58 of the rotary solenoid 56 serving as rotation driving means rotates, and the guide plate 51 interlocked with the opening/closing crank 44 moves forward to its original position and attaches the band to the band guide back plate 52. A band guide path 5 that faces each other through a passing gap and communicates the band passage between the pair of pool rollers 35 and 36 with the band outlet 32.
3 is formed.

[0011]The tip of the band is connected to a pair of pool rollers 3.
5 and 36 through the band guide path 53 and the band exit 3.
2 to the band supply tightening mechanism 60 via the guide shooter 59, the opening/closing crank 44 fixed to the rod 58 of the rotary solenoid 56 rotates in response to the detection signal from the band passage detecting means 62.
The guide plate 51 which is interlocked with the band guide plate 51 is moved back from the original position of the part, and the band guide path 53 is opened, and the band guide path 53 communicates with the pool box 30.

Therefore, after the band tip reaches the band supply tension mechanism 60, or at the same time as the band supply tension mechanism reaches the band supply tension mechanism, the band is supplied to the band guide arch outside the main body, so that the band goes around the band guide arch. When the band tip reaches the band welding mechanism 70,
Since the band guide path 53 has already been opened, the band of the band reel pulled out by the pool roller 75 is pooled into the pool box 30, and the band is pulled out by the pool roller 75.
When a predetermined amount of bands are pooled within the pool, the rotation of the pool roller 75 is stopped in response to a detection signal from a known band pool completion detection means.

[0013]

[Example] An example will be explained with reference to the drawings.
1, 2 and 3, 30 is a pool box, which includes an inner wall 46, an outer wall 47 facing in parallel, and a back wall 48 closing between the inner and outer walls 46, 47, and a band outlet 32 and a band at the upper and lower sides, respectively. An entrance 33 is formed, and a pair of pool rollers 75 facing the band entrance 33 are provided. The circumferential surface of the pool roller 75 faces into the band passageway formed by the pool chute 76 and the chute cover 77 that covers the pool chute 76, and the pool roller 75 is inside the bearing case 34 fixed to the outside of the inner wall 46. The pool feed roller 35 and the pool touch roller 36 are rotatably supported. The pool feed roller 35 is directly connected and driven by a pool motor 37, and the pool touch roller 36 is supported on an eccentric shaft 38, and a plate-shaped handle lever 28 is fixed to the tip of this eccentric shaft 38. A hook 43 is protruded from the tip side of the handle lever 28,
The pool touch roller 36 is normally urged in the direction of the pool feed roller 35 by a spring 41 having one end fixed to this 43 and is pressed against the circumferential surface of the pool feed roller 35. The pool touch roller 36 is the pool feed roller 35
It is configured so that it can be separated from the peripheral surface of. That is, Figure 3
As shown in FIG.
An inverted U-shaped block 42 is arranged so as to surround the outside of the side surface of the pool touch roller 36, which is pivoted on the protruding portion of the pool touch roller 36, and extends over the wall surface of the inner wall 46. The shaft end of the block 42 protrudes from a hole provided at approximately the center of the block 42. The handle lever 28 is fixed to the shaft end of this eccentric shaft 38, and the handle lever 28 is fixed as shown in FIG.
A hook 39 is provided protruding from the block 42 and engages with one edge of the handle lever 8 to stop the rotational movement of the handle lever 28. A spring 4 is connected between the hook 43 protruding from the other end of the handle lever 28 and the block 42.
It is locked at both ends of 1. When the handle lever 28 rotates clockwise on the page of FIG. 1, the pool touch roller 3
6 separates from the circumferential surface of the pool feed roller 35, the handle lever 28 rotates counterclockwise in FIG. The rotational movement stops. (Two-dot chain line in FIG. 1) When the handle lever 28 stops rotating, the pool touch roller 36 is configured to be able to come into pressure contact with the circumferential surface of the pool feed roller 35. A limit switch 49 is a pool feed detection means for detecting that the pool touch roller 36 is pressed against the circumferential surface of the pool feed roller 35. This 49 is attached to the wall surface of the inner wall 46 via a bracket 24 having a Z-shaped cross section, and is provided so as to be freely adjustable in position so as to come into contact with the handle lever 28 when the handle lever 28 stops rotating in the counterclockwise direction. It is being

The detection signal detected by the limit switch 49 causes the opening/closing crank 44 fixed to the tip of a rod 58 of a rotary solenoid 56, which will be described later as rotation driving means for the guide plate, to rotate, thereby causing the guide plate 51 to rotate. It is moved forward to a position (hereinafter referred to as "original position") where it faces the band guide back plate 52 with a band passing gap therebetween and forms a band guide path 53.

Furthermore, within the pool box 30, there is a band guide path 5 communicating between the band path exit of the pool shooter 76 and the band exit 32 of the pool box 30.
3 will be provided. The band guide path 53 is a band passage path, and as shown in FIG. 2, a band guide back plate 52 is fixed to the wall surface of the inner wall 46, and a guide plate 51 is opposed to the band guide back plate 52 through a band passing gap. At least it is formed by the inner wall surfaces of the guide plate 51 in its original position, the band guide back plate 52, and the inner wall 46. The guide plate 51 is
One longitudinal edge of this guide plate 51 is connected to the longitudinal edge of the band guide back plate 52 by two hinges 5 located above and below.
5, the guide plate 51 is rotatably mounted in a direction perpendicular to the longitudinal direction of the guide plate 51, and the guide plate 51 is provided so as to be freely movable back and forth in the original position.

Note that in FIG. 1, the pool box 30
One side back wall 48 is provided in a straight line connecting the band passage exit of the pool shooter 76 and the band exit 32 of the pool box 30, and this straight one side back wall 48 is used as the band guide back plate 52. Can be done. Further, one longitudinal edge of the guide plate 51 can be pivotally attached to the wall surface of the outer wall 47 via a hinge 55.

Further, as shown in FIG. 2, the guide plate 51 has one end of a spring 25 secured to the tip of a flange portion extending rearward from the rotation axis of the guide plate 51, and the spring 25 allows the guide plate 51 to return to its original position. is biased in the direction of retreating from the Note that the guide plate 51 can be biased in the direction of retreating from the original position or in the direction of advancing towards the original position by providing a torsion type spring on the rotating shaft. The guide plate 51 includes a guide plate 5
An opening/closing lever 54 is provided to protrude from the edge of the guide plate 51 perpendicularly to the rotational axis direction of the guide plate 51.

Further, 56 is a rotary solenoid, which is a rotation driving means for rotating the guide plate 51. The rotary solenoid 56 is installed on the inner wall 46 via a bracket 57 with the axial direction of a rod 58 serving as a rotation axis being in the same direction as the rotation axis of the guide plate 51. An opening/closing crank 44 is fixed to the tip of the rod 58, and a roller 45 pivoted to the tip of the opening/closing crank 44 is moved forward in the urging direction of the opening/closing lever 54 of the guide plate 51, that is, the guide plate 51 is moved back from its original position. The opening/closing crank 44 is brought into contact with and engaged with the opening/closing lever 54 at the front in the biasing direction to advance or forward in the biasing direction to advance to the original position.
and the guide plate 51 are interlocked.

The guide plate 51 is urged in the direction of advancing to the original position via the spring 25, and the tip of the opening/closing crank 44 of the rotary solenoid 56 is brought into contact with the front of the guide plate 51 in the direction of the urging direction. It can also be combined.

Further, the guide plate 51 is not biased to rotate by using a spring 25 or the like, but is connected to the tip of the opening/closing crank 44 attached to the tip of the rod 58 of the rotary solenoid 56 and the opening/closing lever of the guide plate 51. 54 can also be integrally connected by a rigid body such as a rod.

Furthermore, the rotary solenoid 56 serving as the rotary drive means is replaced with a solenoid that moves forward and backward in a straight line, and the rod tip of the solenoid and the guide plate 51
The guide plate 51 can be provided rotatably by being directly connected to the opening/closing lever 54 or by being connected to the solenoid via a connecting rod. In addition, as shown in FIG. 1, rollers 7 are provided near the band exit 32 and the band entrance 33, respectively.
8 and a roller 79 are attached to the shaft. Further, the outer wall 47 of the pool box 30 is provided with a pool box door 29 that can freely open and close a portion of the outer wall 47 via a hinge 27, as shown in FIG. 22 is a magnet for holding the pool box door 29 closed. Note that a known band pool completion detection means (not shown) is provided in the pool box 30.

Next, regarding the band supply tightening mechanism 60, FIG.
This will be explained with reference to FIG. Band supply tightening mechanism 6
0 is configured such that a forward rotating roller 10 serving as a feed roller and a reverse rotating roller 20 serving as a return roller are arranged facing the band shooter 31 at a predetermined interval. A motor 15 with a reducer is directly connected to the drive shaft 11 of the forward rotation roller 10, and a gear 19 provided on the drive shaft 11 is connected to the reverse rotation roller 20.
It meshes with a gear 26 having a larger diameter than the gear 19 provided on the shaft 21 of the gear. Therefore, the normal rotation roller 10 and the reverse rotation roller 20 always rotate in opposite directions.

Reference numerals 13 and 23 denote normal/reverse rotation touch rollers which are rocker rollers and have substantially the same configuration.The structure related to both the normal/reverse rotation rollers will be explained with reference to FIG. 5 showing the operating mechanism of the normal rotation touch roller 13. Both forward and reverse rotation touch rollers are supported by eccentric shafts 86, 85, and the upper ends of operating rods 90, 95 are rotatably attached to the tips of the shafts 86, 85, and the lower ends of the operating rods 90, 95 are arranged in an L-shape. Interlocking rod 91
, 96, and is connected to the operating rod 90 via a spring 93. L-shaped interlocking rod 9
1 is attached to the tips of arm rods 98 and 99 having trochanters 94 and 97. One end of the arm rods 98, 99 is rotatably supported on a shaft 100 protruding from the machine base, and a spring 101 is engaged with the other end to bias it toward the band shooter 31.

Reference numerals 102 and 103 denote a cam shaft 4 that operates a band welding mechanism 70 consisting of a known band gripper, a heater (not shown), a center press, etc.
0 is mounted on an extended shaft and brought into contact with the trochanters 94, 97 of the arm rods 98, 99 to operate in conjunction with the interlocking rods 91, 96, and therefore with the actuating rods 90, 95.

In FIG. 4, reference numeral 62 denotes a band passage detecting means, and a limit switch, a proximity switch, etc. is connected to the normal rotation roller 10 in the band passage path of the band shooter 31 so as to detect that the leading end of the band has passed the normal rotation rollers 10, 13. ,1
It is shown at a position near No. 3. The detection signal detected by the band passage detection means 62 causes the opening/closing crank 44 fixed to the tip of the rod 58 of the rotary solenoid 56 to rotate, thereby retracting the guide plate 51 from its original position.

In the illustrated embodiment, the forward rotation touch roller 13 and the reverse rotation touch roller 23 are driven rollers that rotate in sliding contact with the forward rotation roller 10 and the reverse rotation roller 20, respectively. The roller 13, the reversing roller 20, and the reversing touch roller 23 may be engaged with each other by upper and lower gears having the same diameter, and may be provided so as to drive each other in forward and reverse directions.

Next, the operation of the above embodiment will be explained.

When loading a band, the handle lever 28, which is attached to the tip of the eccentric shaft 38, is placed in the solid line position in FIG. 1 in advance. At this time, the center line of the spring 41, whose both ends are locked between the hook 43 protruding from the handle lever 28 and the hook 39 protruding from the block 42, is deviated downward from the position of the eccentric shaft 38 in FIG. The shaft 38 is rotated clockwise, and the pool touch roller 36 is separated from the circumferential surface of the pool feed roller 35. A band 1 pulled out from a band coil attached to a band reel (not shown) is passed through a roller 79 to a pool box 3.
It is inserted between the pool feed roller 35 and the pool touch roller 36 from the band passage path of the pool shooter 76 facing the band entrance 33 of No. 0. Next, the handle lever 28 is rotated counterclockwise in FIG.
When the pool touch roller 36 comes into contact with the circumferential surface of the pool feed roller 35 via the band, the side edge of the handle lever 28 presses the limit switch 49 at this time. The detection signal from the limit switch 49 causes the rod 58 of the rotary solenoid 56 to rotate, and the opening/closing crank 44 to rotate counterclockwise in FIG. 2 . That is, the roller 45 at the tip of the opening/closing crank 44 moves from the two-dot chain line to the position shown by the solid line. Therefore, the guide plate 51 located at the position indicated by the two-dot chain line in FIG. Move forward to the position and pool shooter 7
A band guide path 53 is formed that communicates the band passage exit of No. 6 with the band exit 32 of the pool box 30. Here, when the operation start switch on the front of the packing machine body is turned on, the pool motor 37 is turned on because the limit switch 49, which is the pool feed detection means, is already turned on.
N and the pool motor 37 rotates, so the band is pulled out from the band reel 25 between the pool feed roller 35 and the pool touch roller 36, which is pressed against the pool feed roller 35 by a spring 41 and rotates as a result. The band passes through the band guide path 53 formed between the guide plate 51 and the band guide back plate 52, is fed into the guide chute 59 from the band outlet 32, then reaches the band chute 31, and passes between the normal rotating rollers 10 and 13. reach. Band passage detection means 6 is placed facing into the band passage path of the band shooter 31.
2 generates a detection signal to detect that the band tip has passed. Then, in response to the detection signal from the band passage detection means 62, the opening/closing crank 44 rotates clockwise in FIG. 2, and the roller 45 at the tip of the opening/closing crank 44 moves from the solid line to the position indicated by the two-dot chain line. Therefore, the guide plate 51 rotates and retreats from its original position (the position indicated by the solid line in FIG. 2) to the position indicated by the chain double-dashed line by the counterclockwise biasing force of the spring 25, so that the band guide path 53 is opened and the pool box Connects with 30.

When the operation start switch is turned on, the normal roller 10 which is directly connected to the motor 15 with a reduction gear and the camshaft 40 which is directly connected to a camshaft motor (not shown) rotate, and the convex part of the cam 102 rotates. The child 94 is pushed up, the normal rotation touch roller 13 is pressed against the normal rotation roller 10 (FIG. 5), and the band that has reached the band shooter 31 is pressed against both rollers 10, 13.
is fed into the bar 81 on the main body 80 and reaches the band welding mechanism 70. The pressure contact between the rollers 10 and 13 is released when the camshaft 40, which has been stopped for the set time of a timer connected to the camshaft motor, rotates again, but after the band tip reaches the band welding mechanism 70, the For a short period of time until the pressure contact between the rollers 10 and 13 is released, the band becomes slack and spreads downward to the band guide arch 81, band shooter 31, and guide shooter 59, but the band guide path 53 has already been opened as described above. Since the band is in communication with the pool box 30, the slack of the band is returned to the pool box 30, thereby preventing problems such as the band jamming in the band passage leading to the guide shooter 59, band shooter 31, band guide arch, and band welding mechanism 70. does not occur.

On the other hand, the pool motor 37 continues to rotate even after the band tip reaches the band welding mechanism 70.
The band pulled out from the band reel between the pool feed rollers 35 and 36 is pooled in the pool box 30. When a predetermined amount of bands are pooled, the pool motor 37 is stopped by a detection signal from a known band pool completion detection means (not shown).

[0031] With the above steps, band loading and band pooling are completed, and preparation for packaging is completed.

Now, the band supply tightening mechanism 60 has a cam 102 between the normal rotation roller 10 and the normal rotation touch roller 13.
Since the convex portion is not in a position to push up the trochanter 94, there is a gap that exceeds the thickness of at least one band, and the band within the band shooter 31 is not affected. The same holds true for the relationship between the reversing roller 20 and the reversing touch roller 23.

At this point, the camshaft 40 is rotated by the activation switch, and the band tip is gripped by the band tip gripping mechanism of the band welding mechanism. Since the cam 103 is also rotating at the same time, the operating rod 95 is pushed down via the trochanter 97, the arm rod 99, and the interlocking rod 96, and the eccentric shaft rotates in an arc, causing the reversing touch roller 23 supported on the eccentric shaft. is pressed down and pressed against the reversing roller 20. Therefore, band shooter 3
The band feeding end side of the band 1 is pulled back at high speed by a pair of rotationally driven rollers, and then the band is tightened by a reversing roller 20 and a reversing touch roller 23.

When the set time has elapsed and the band is tightly wound around the object to be packed, the camshaft 40 rotates again and the band supply end side is gripped, and the rotation of the camshaft 40 causes the arm rod 99 to rotate.
slides, the pressure contact between the reversing touch roller 23 and the reversing roller 20 is released, and a gap is formed between each roller in the band shooter 31 to the extent that the rollers do not contact the band, and the band welding mechanism is activated by the camshaft 40 which continues to rotate. Welding of the band overlapping part and cutting of the supply end side are performed. camshaft 4
The rotation at 0 is achieved by the rotation of the cam and the rotation of the reversing roller 10 and the reversing touch roller 13 at the same time as the known gripping of the band supply end side.
The pressure on the band is released, the band returns to its previous position, and the known steps of band cutting and welding are completed. On the other hand, since the rotation of the camshaft 40 rotates the cam, the normal rotation rollers 10 and 13 are in the state shown in FIG. 5, and the band is pressed between both rollers to supply a certain amount of the band to the upper surface of the main body.

By the timer or other control means, the camshaft 40 is rotated again, the eccentric shaft 86 is rotated via the operating rod 90, the pressure contact between the normal rotation touch roller 13 and the normal rotation roller 10 is released, and the rotation is resumed. The band supply is completed by the rotation of the cam 102.

When the amount of bands pooled in the pool box 30 decreases due to the band supply described above, the pool motor 37 is rotated by a detection signal from a known band pool completion detection means (not shown), and a predetermined amount of bands is transferred from the band reel. The bands are pulled out and pooled in the pool box 30 again, and when a predetermined amount is reached, the pool motor 37 is stopped. The same action is repeated thereafter.

[0037]

Effects of the Invention The present invention provides a band loading device for a packing machine in which a band passing gap is provided between a band passing path between the pair of pool rollers and a band outlet in the pool box and a band passing gap is provided to the band guide back plate. The guide plate is connected to the part through a band guide path that faces the original position of the part, and one longitudinal edge of the guide plate is pivotally attached to one side wall of the pool box, so that the guide plate is connected to the part. The band is rotatable in a direction perpendicular to the longitudinal direction of the band and can be moved back and forth to the original position of the guide plate, and the guide plate is interlocked with a rod of a rotation driving means for the guide plate, and the pool roller is configured to feed the band. A pool feed detection means for detecting the start of the feed and a band passage detection means for detecting that the band tip has passed the band supply tightening mechanism are provided, and each detection signal of the pool feed detection means and the band passage detection means is provided. Accordingly, when the band is fed by the pair of pool rollers, the guide plate is advanced to the original position of the portion by the pool feed detection means, and the rotation drive means of the guide plate is operable. A band guide path is automatically formed between the band passage path between the pool rollers and the band exit of the pool box. Therefore, with a simple configuration, it is possible to easily load the band at the initial stage of use of the packing machine and when replacing the band coil, and eliminates the troublesome work of the operator in raising the guide plate as in the conventional technology. At the same time, the band loading error caused by forgetting to raise the guide plate, which was the case in the past, is eliminated, and the band can be reliably fed to the band supply and tightening mechanism.

Furthermore, when the band passes through the band supply tightening mechanism, the guide plate retreats from its original position in response to a detection signal from the band passage detection means and opens the band guide path in a timely manner. It saves the trouble of laying down the guide plate and eliminates the occurrence of band jams in the band passage of the packaging machine.
It was possible to provide a band loading device that improves work efficiency.

[0039] The guide plate is urged in the direction of retreating from the original position or moving forward to the original position via a spring, and the tip of the opening/closing crank fixed to the rod of the rotary solenoid is engaged with the front of the guide plate in the urging direction. Since the opening/closing crank and the guide plate are interlocked by tightening, the guide plate can be reliably moved back and forth to its original position, and the structure can be simple and compact.

[0040] The pool touch roller is eccentrically supported, and the rotation of the handle lever is detected on the rotation locus of the handle lever fixed to the eccentric shaft of the pool touch roller, and the pool touch roller is brought into pressure contact with the pool feed roller. Since the pool feed detection means for detecting this is provided, the guide plate can reliably advance to its original position to form a band guide path with a simple structure and when the band between the pool rollers is fed.

[Brief explanation of the drawing]

FIG. 1 is a front view of a band loading device of the present invention.

FIG. 2 is a view taken along line AA in FIG. 1;

FIG. 3 is a view taken along line BB in FIG. 1;

FIG. 4 is a front view of the band supply tightening mechanism.

FIG. 5 is a sectional view of a feed roller portion.

FIG. 6 is a side view showing the prior art with the other side wall of the pool box removed.

FIG. 7 is a vertical cross-sectional view of the main part of FIG. 6;

[Explanation of symbols]

1...Band, 10...Normal rotation roller, 11...Drive shaft, 13...
Normal rotation touch roller, 15...motor, 19...gear, 20...
Reversing roller, 21...axis, 22...magnet, 24...bracket, 25...spring, 26...gear, 27...hinge, 28...handle lever, 29...pool box door,
30...pool box, 31...band shooter, 32...
Band exit, 33...Band inlet, 34...Bearing case, 35...Pool feed roller, 36...Pool touch roller, 37...Pool motor, 38...Eccentric shaft, 39...Hook, 40...Camshaft, 41...Spring, 42... Block, 43... Hook, 44... Opening/closing crank, 45... Roller, 46... Inner wall, 47... Outer wall, 48... Back wall, 49... Limit switch, 51... Guide plate, 52... Band guide back plate, 53... Band guide path , 54...Opening/closing lever, 5
5... Hinge, 56... Rotary solenoid, 57... Bracket, 58... Rod, 59... Guide shooter, 62... Band passage detection means, 70... Band welding mechanism, 75... Pool roller, 76... Pool shooter, 77... Shooter cover, 78...Roller, 79...Roller, 85...Eccentric shaft, 86
... Eccentric shaft, 90... Operating rod, 91... Interlocking rod, 92... Hole,
93...spring, 94...trochanter, 95...operating rod, 96...
Interlocking rod, 97...trochanter, 98...arm rod, 99...arm rod, 100
...shaft, 101...spring, 102...cam, 103...cam,

Claims (4)

[Claims] 1. A pool box having a pair of pool rollers for feeding the band from the inlet into a pool box having an outlet and an inlet for the band, and further comprising a band supply tightening mechanism and a band welding mechanism for tightening the band against the object to be packed, and a band welding mechanism. In a packing machine in which a band supply tightening mechanism and a band outlet of the pool box are communicated via a guide shooter, a band guide is provided in the pool box between a band passing path between the pair of pool rollers and the band outlet. A guide plate is communicated with the back plate through a band guide path that faces each other through a band passing gap, and one longitudinal edge of the guide plate is pivotally attached to one side wall surface of the pool box. A guide plate is provided so as to be rotatable in a direction perpendicular to the longitudinal direction of the part and to be movable back and forth at an original position where the guide plate faces the band guide back plate and forms a band guide path, and the guide plate is moved forward and backward. pool feed detection means that is interlocked with the rod of the dynamic drive means and detects when the pool roller starts feeding the band; and band passage detection means that detects that the leading end of the band has passed through the band supply tightening mechanism. A band loading device for a packing machine, characterized in that the rotation drive means is operable by detection signals from the pool feed detection means and the band passage detection means. 2. The band loading device for a packaging machine according to claim 1, wherein one side rear wall of the pool box is the band guide back plate. 3. The guide plate is urged through a spring in the direction of moving backward from the original position or forward to the original position, and the tip of the opening/closing crank fixed to the rod of the rotary solenoid serving as the rotation driving means is pressed against the guide plate. 2. The band loading device for a packaging machine according to claim 1, wherein the opening/closing crank and the guide plate are interlocked by engaging forward in the biasing direction. 4. A pool feed roller and a pool touch roller that can be pressed against and separated from the pool feed roller are provided at the entrance of the pool box, the pool touch roller is eccentrically supported, and a handle is fixed to the eccentric shaft of the pool touch roller. Band loading in a packaging machine according to claim 1 or 3, further comprising pool feed detection means for detecting the rotation of the handle lever on the rotation locus of the lever and detecting that the pool touch roller is in pressure contact with the pool feed roller. Device.