JP2000289706A - Method for discharging band terminating end in packing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a band terminating end from being fed in a band guide arch direction from a band outlet of a pool box by detecting that the band terminating end of a band coil fitted to a band reel is pooled in the pool box, and discharging the band terminating end outside a packing machine. SOLUTION: In operating a packing machine provided with a band feeding mechanism to feed a band into a band guide arch 12, when a starting switch 125 is turned on, a band guide located below a slide table 9 at the original position is retracted, and the band is tightened around a work to be packed by pulling back the band whose forward end is held by a band tightening mechanism. When a detecting means detects that the band terminating end of the band coil fitted to a band reel 8 is fed in the pool box, and the absence of the preset band pool quantity is detected, the slide table 9 is stopped at its retraction limit after a pressing member is released, and the terminating end of the band is discharged outside the machine.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of discharging a band end of a packing machine, and more particularly, to detecting that a band end of a band coil mounted on a band reel has been sent into a pool box and having the band end. The present invention relates to a band end discharging method for discharging a band from a pool box to the outside of a band without feeding the band into a band guide arch, and preventing a band that is insufficient for one round of the band guide arch from remaining in the band guide arch.

[0002]

2. Description of the Related Art As shown in FIG. 10, a conventional type of packing machine 6 is a so-called vertical type fully automatic packing machine which supplies a known band, grasps a tip side, pulls back on a supply side, tightens, and so on. Slide table 9 for cutting and adhering the band overlap section
And a downward U-shaped band guide arch 12 laid across both longitudinal edges at the center of a work table 18 placed on the upper surface of the main body 7.
And a band reel 8 provided on one side in the longitudinal direction of the main body 7 and capable of mounting a band coil in a direction orthogonal to the band guide arch 12.

On the side of the same plane as the band guide arch 12, a band through which a coiled band mounted on a band reel 8 passes as described in JP-B-3-21407 as a prior art. A pool box 32 having an entrance and a band outlet for supplying a band into the band guide arch is provided, and a pair of pool rollers 31 for feeding a band of band coils into the pool box 32 is provided near the band entrance. Rotation driving means for rotating the motor 31 is provided.

Further, the pool box 32 is provided with a known set band pool amount detecting means for detecting the presence or absence of the set band pool amount in the pool box 32 fed by the pool roller 31.

A tension arm 115 slides by rotating the cam shaft to tighten the band. 20
Is a pair of feed rollers, which supply the band into the band guide arch 12 by the rotation driving means and pull back the band in the band guide arch 12 by the rotation driving means when packing the object to be packed.

[0006]

In the conventional packing machine, when the object to be packed is placed on the work table 18 and the start switch 125 is pressed to close the start circuit, various mechanisms in the main body 7 are activated. When the feed roller 151 rotates in reverse, the band escapes from the inside of the band guide arch 12 and is wound around the object to be packed, the tension arm 115 slides and tightens, and the band is cut by the band welding mechanism.
After the welding, the feed roller 151 rotates forward to feed the band into the band guide arch 12, and one packing process is completed. When this packing step is repeatedly performed, the band in the pool box 32 is fed to the band guide arch 12 and decreases, and the band is detected by the set band pool amount detecting means for detecting the absence of the preset band pool amount. The rotation drive means operates to rotate the pool roller 31 and supply the band of the band coil of the band reel 8 into the pool box 32.

As described above, as the packing process is repeated, the band of the band coil gradually decreases,
Finally, the final end of the band of the band coil is pool box 3
2 and then, after several band packing steps, less than one turn of the band guide arch having the band's last end in the pool box, the band feeding mechanism in the packing step activates the band guide arch 12 within the band guide arch 12. Will be sent to

If the last end of the band is fed into the band guide arch and the last end of the band comes off the pair of reversing rollers of the band retraction mechanism, the band in the band guide arch cannot be pulled back and packing is impossible. Therefore, the band guide arch must be opened and the band in the arch must be pulled out by hand, and this operation has a problem that it is troublesome and time-consuming.

Alternatively, if the band is sandwiched between a pair of reverse rollers, but the last end of the band is in the band passageway between the reverse roller and the outlet of the pool box, when the band is pulled back, the last end of the band is There is a problem that the band is caught in the band passage, and the band is folded in a superimposed wave shape in the band passage so as to cause a so-called jam like a leaf spring. In such a case, an extremely complicated operation was required to remove the jammed band from the portion.

[0010] Incidentally, the operator does not notice even if the band reel runs out of the band during the packing operation, especially when performing the packing operation continuously, and the final end of the band is fed into the band guide arch and packed. I often noticed when I was unable to do so.

SUMMARY OF THE INVENTION The present invention has been developed to solve the above problems, and detects that the band end of a band coil mounted on a band reel has been pooled in a pool box and detects the band end. It is an object of the present invention to provide a method for detecting the end of the band, which prevents the band from being fed from the band outlet of the pool box toward the band guide arch.

[0012]

In order to achieve the above object, in the band end detecting method of the present invention, a band outlet mechanism for supplying a band to a band guide arch 12 provided on a packing machine body is provided. , And the band of the band coil mounted on the band reel 8 is supplied to the pool box via the band entrance by pool rollers 33 and 34 having rotation driving means near the band entrance. A step of controlling the band pool amount in the pool box to the set band pool amount by the set band pool amount detecting means 48 for detecting that the band amount is less than the set band pool amount; The band guide located below the table 9 is retracted, the tip of the band is grasped, and the band guide in the band guide arch is retracted. The band is pulled back by the band tightening mechanism to tighten the object to be packed, and the pressing members 81, 82, 83 are pressed against the slide table 9 at the original position to cut the band supply end. Welded,
Next, the pressing of the press member is released, the slide table is retracted, the object to be packed is packed with the band, the members are returned to their original positions, and the band in the pool box is supplied to the band supply mechanism. In a packing method comprising a one-cycle process of supplying the band coil into the band guide arch, the band terminal detecting means 100 detects that the band terminal of the band coil mounted on the band reel has been supplied into the pool box. A start signal generated by closing the start switch 125 while the detection signal is being generated and the set band pool amount detecting means 48 is generating the set band pool amount non-existence detection signal, after the pressing of the press member is released. The slide table 9 is stopped at the retreat limit of the slide table, and the slide table in the pool box is stopped. Band feed mechanism such as de, characterized by discharging all or at least a portion of the end of the band in operation set time to the packing machine body outside.
When a part is discharged, it is easy to discard it manually.

After the band supply mechanism has been operated for a set time, the band supply mechanism is stopped, and the band at the end is removed. Then, a band coil is newly mounted on the band reel, and the band communicates with a band inlet and a band outlet of the pool box. After the band is loaded into the supply mechanism, the slide table is returned to the original position by closing the start switch, and then, the rotary drive for supplying the band of the band coil mounted on the band reel into the pool box. Activating the means, pooling the band, and activating the band supply mechanism for supplying the band in the pool box into the band guide arch, only by opening and closing the start switch,
It can be in a packaging standby state.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings while omitting parts similar to those in the related art. Pool box 161 161 is a pool box, and in FIG.
Is provided on the side surface on the same plane as the band guide arch 12 of FIG. The pool box 161 is formed in a box shape such that one surface of a front plate 163 having a horizontally long rectangular shape is opposed to the main body outer plate 37 in parallel with a gap slightly larger than the band width, and inside the pool box 161. The band is formed in a size that can accommodate a larger amount of bands than the amount of bands supplied to the band guide arch 12 in at least one package.

As shown in FIG. 4, the front plate 163 has flanges 631 and 63
1, 631, 631 are bent to form a front plate 16
3 and four insertion holes 67, 67, 67, 67 through which each stepped pin 162 can be inserted near each rectangular corner.
The upper two insertion holes 67 of these insertion holes 67 are provided.
A semicircular notch is formed at the upper end edge of the stepped pin 162 so that it can be inserted into each groove. Each stepped pin 162 is inserted into each of the insertion holes 67 of the front plate 163, and the upper edge of the semicircular notch or the insertion hole 67 is inserted into each of the stepped pins 16.
2 and the front plate 163 is opposed to the main body outer plate 37 in parallel with a gap slightly larger than the band width.

A back pool box 71 is a back pool box, and a pool box 161 is provided.
Similarly to the above, the back pool plate 73 is opposed to the main body outer plate 37 via a gap slightly larger than the band width, and the back pool plate 73 is hinged to an edge forming one side of a rectangle of the front plate 163 of the pool box 161. It is provided so as to be openable and closable via 72, 72 and communicates with the internal space adjacent to the pool box 161 to form a part of the pool box.

The pool roller 31 is a pool roller for feeding the band of the band coil mounted on the band reel 8 to the pool box 161. The pool roller 31 is provided below the back pool box 71 as shown in FIG. 4, and is basically provided in a band passage 75 that communicates with the band inlet of the pool shooter 35 provided on the side and the inside of the pool box 161. A drive roller 34 driven to rotate by a motor (FIG. 1; 129); and a drive roller 34 supported by an eccentric shaft 143.
And the peripheral surface of a floating roller 33 pressed and separated via a band.

Band end detecting means 100 The band end can be detected by detecting the pressure contact of the floating roller 34, which is supported by the eccentric shaft 143 forming the pool roller 31 of the pool box 161, with the drive roller 33. it can. That is, when there is no band between the drive roller 33 and the idle roller 34,
Since the floating roller 34 swings toward the driving roller 33 by the band thickness via the eccentric shaft 143, the floating roller 34
The end of the band can be detected by detecting the swing of the band. Here, as shown schematically in FIG. When the band disappears in the passage 75, the lead piece is moved to the bottom of the band passage 75, and is detected so as to output a band end detection signal.

The set band pool amount detecting means 80 is a set band pool amount detecting means for detecting the presence or absence of the set band pool amount in the pool box 161. In FIG. 4, the set band pool amount detecting means 80 includes a balance bar 45 having an L-shaped cross section rotatably supported on the main body outer plate 37 and a lower edge between the outer plate 37 of the pool box 161 and the front plate 163. It is arranged below the opening and has a gap between the balance bar 45 and the lower edge of the front plate 163 (FIG. 6).

As shown in detail in FIG. 5, the balance bar 45 is provided with a sleeve 4 on a shaft 46 projecting from the surface of the outer plate 37.
Short block-shaped base 81 which is supported via 7, 47
One end of a long balance bar 45 having an L-shaped cross section is fixed to one end with screws 189, 189. As shown in FIG. 4, the base 811 of the balance bar 45 is located below the band inlet of the pool box 161 on the opposite side to the band entrance, that is, in the band passage 75 where the band of the band coil is fed into the pool box 161. The shaft 46 is supported at the farthest position from the band outlet, and the tip of the balance bar 45 is located below the pool box 161 on the band inlet side.

Further, the balance bar 45 is connected to the base 81.
A pin 84 is provided on the tip of the shaft 1 substantially in parallel with the axial direction of the shaft 46.
(FIG. 5), and the tip of the pin 84 is inserted into a locking hole 191 provided in the outer panel 37 of the main body, so that the pool box 161 is formed.
Of the main body outer plate 37. The locking hole 191 is a stopper for restricting the sliding operation of pressing the limit switch of the balance bar.

Further, as shown in FIG. 6, one end of the balance bar spring 49 is connected to the end of the pin 84, and the other end of the balance bar spring 49 is connected to the other end of the pin 84 via a return 193 as used in fishing gear or the like. Adjustment bolt 188
And the other end of the adjustment bolt 188 is screwed into a nut fixed to the plate of the main body 7 by welding.

The balance bar 45 is urged by the balance bar spring 49 so as to always slide inward of the pool box 161.
The pin 84 abuts on the upper edge of the locking hole 191 to restrict the sliding movement of the balance bar 45. The urging force of the balance bar spring 49 is adjusted by rotating the adjustment bolt 188. As shown in FIG. 7, the limit switch 48 has a lead piece 861 mounted on a back surface of the outer plate 37 via a limit switch bracket 192 so as to be pressed on the sliding locus of the pin 84. The limit switch 48 is provided at the rear of the direction in which the balance bar 45 slides outward from the pool box 161, and the lead 841 of the limit switch 48 holds the pin 84 against the upper edge of the locking hole 191. It is urged so as to be constantly pressed through the balance bar spring 49 at the contact position.

The limit switch bracket 192
Is a bolt 19 in two long holes 194 and 194 provided in the portion.
5, 195, which is screwed on the back surface of the outer plate 37 so as to be movable up and down. By vertically moving the limit switch bracket 192, the position where the lead piece 861 of the limit switch 48 contacts the pin 84 is finely adjusted. Is done.

Description of the operation of the set band pool amount detecting means 80 In FIG. 4, the band pulled out from the band coil of the band reel 8 has the band tip from the band inlet of the pool shooter 35 and the floating roller 34 of the pool roller 31 and the driving roller. After passing through the band passageway 75 through the interval 33, FIG.
As shown by the two-dot chain line, a predetermined band amount is pooled in the pool box 161, and the tip of the band is fed into the band guide arch 12 via the band feeding mechanism above the pool box.

At this time, the balance bar 45 is in a position where the balance bar 45 swings clockwise in FIG. 4 against the urging force of the balance bar spring 49 (FIG. 6) due to the tension (hip) or weight of the band. That is, in FIG. 7 which is an enlarged rear view of the main part of FIG. 4, the balance bar 45 is pressed in the counterclockwise direction in FIG. The lead piece 86 of the limit switch 48 separated from the upper edge of the 191
7 is released (solid line in FIG. 7), the limit switch 48 is turned off, and the pool motor 129 is turned off.
At F, the band feeding into the pool box 161 is stopped.

When a start signal is generated by pressing the start switch 125, various mechanisms for pulling back, tightening, cutting, and bonding the band overlapping portion in the main body 7 are operated, as will be described in detail later. Pack things. The supply side of the band pulled back from the band guide arch 12 and tightened is pooled in the back pool 71 adjacent to the pool box in a somewhat slack state (FIG. 4).

Next, when the band in the pool box 161 is fed into the band guide arch 12 by the operation of the band supply mechanism, the set band pool amount in the pool box 161 decreases. The balance bar 4 is biased by the balance bar spring 49.
5 is slid counterclockwise in FIG. That is, the balance bar 45 slides clockwise in FIG. 5, the pin 84 pushes the lead piece 861 in a direction to short-circuit the contact of the limit switch 48 (two-dot chain line in FIG. 7), and the upper end of the locking hole 191. Stop at the rim. At this time, the set band pool amount non-existence detection signal is generated from the limit switch 48,
With this signal, the pool motor is turned on, and the drive roller 33 is turned on.
The idle roller 34 rotates, and the band of the band coil of the band reel 8 is fed into the pool box 161. Thereafter, when the band of the set band pool amount is pooled, the balance bar 45 is pushed down again, and the same as described above. Stop feeding the band.

As described above, the supply of the band to the band guide arch 12 causes the above operation to be repeated according to the decrease in the number of bands in the pool box 161, and the pool box 161.
The band amount within is maintained at the set band pool amount.

Band Supply / Tightening Mechanism and Band Cutting / Welding Mechanism As shown in FIGS. 8 and 9, a band shooter forming a band passage is composed of a return shooter 1, a tension shooter 59, and a feed shooter 30. A reverse roller 10 serving as a return roller facing the band passing path 41a in 1 and rotating in the band pulling-back action direction, and a reverse rotation touch roller 13 as a touch roller slidably in contact with the reverse roller 10 and rotatably driven are provided.

The drive shaft 11 of the reverse rotation roller 10 has a shaft end protruding from the back surface of the substrate 5 and a pulley 12a for a flat belt is wedged on the shaft end of the drive shaft 11 as shown in FIGS. The right presser 81 having the pulley 12a and the band passage hole 105 serving as a cutter upper blade, which forms a known band cutting / welding mechanism, a heater not shown, and a cutter (lower blade)
The press member of the middle presser 82 and the left presser 83 provided with 104, the slide table 9, the band guide 107, and the heater (not shown) that moves forward and backward to the band overlapping section (FIG. 11)
Shaft reducer 44 for driving the camshaft 4 for operating the motor
The flat belt 14 is wound around a pulley 12b provided on the input shaft of the above, and the reverse rotation roller 10 is constantly rotating. The input shaft is connected to a motor (not shown) on the right side of FIG. 9 via a belt 43, and the camshaft 4 is a camshaft electromagnetic clutch (FIG. 1; 117) provided on the input shaft, and an electromagnetic brake (FIG. 1; 1
The rotation is controlled by 28).

The reverse touch roller 13 has an eccentric shaft 86.
U is provided with one end of an operating rod 90 fixed to the rear end of the shaft 86 with a bolt, and the other end of the operating rod 90 provided on a connecting piece 95.
The connecting piece 95 is loosely fitted in the U-shaped groove portion 92 and is connected to the operating rod 90 by a split pin 96. The upper end of the interlocking rod 91 is screwed to the lower end of the connecting piece 95, and the lower end of the interlocking rod 91 is
One end of the arm rod 98 is rotatably provided at a fulcrum 97 on a bracket 99 below the substrate 5.
8 having the other end provided on the bracket 99.
Of the rod 88. The lower end of the interlocking rod 91 is urged via a spring 94 in a direction in which the reverse rotation touch roller 13 is always separated from the reverse rotation roller 10. Note that a compression spring may be built in the connection piece 95, or the operating rod 90 and the interlocking rod 91 may be connected by a tension spring.

Further, a pulley 67b is provided via another electromagnetic clutch for tightening rollers provided in parallel with the input shaft of the camshaft reducer 44 coaxially with the pulley 12b. The tightening roller 51 serving as a return roller is a drive shaft 22 of a tightening speed reducer 52.
The pulley 67b is connected to the pulley 67b attached to the rear end of the pulley 67 via a V-belt 68 and is driven to rotate (FIG. 9).

The tension roller 51 is a large-diameter roller in which an elastic body 53 such as urethane having a high frictional resistance is attached to the outer periphery of a metallic roller. The roller 54 is provided so as to be capable of being pressed and separated.

As shown in FIG. 8, the tightening touch roller 54 is attached to a shaft 58 of an arm rod 57 having one end rotatably connected to the substrate 5 by a shaft 66, and the other end of the arm rod 57 is connected to a solenoid 55. The outer periphery of the tightening touch roller 54 is configured to be able to be pressed against and separated from the outer periphery of the tightening roller 51 by expansion and contraction of the rod 56.

The tension shooter 59 includes the tightening roller 5.
1 is formed by providing a band passage 41b forming an allowable band passage gap, one end of which is formed at the rear end of the return shooter 1 and the other end is formed of the tightening touch roller 54.
The lower end of the tension shooter 59 is engaged with the arm rod 57 by pins 60 and 60 so as to be movable up and down in conjunction with the sliding movement of the arm rod 57.

Further, the tension shooter 59 is provided with a long hole 61 as a vertically long guide groove, and a guide pin 62 projecting from a reinforcing plate 63 attached to the surface of the substrate 5 is inserted into the long hole 61. I do. The tension shooter 59 is guided by a guide pin 62 and moves up and down in conjunction with the swinging movement of the arm rod 57 due to the expansion and contraction of the rod 56 of the solenoid 55. That is, the arm rod 57 is usually
As shown by the solid line in FIG. 8, the tightening touch roller 54 is positioned below the sheet of FIG. 8 in contact with the tip of the stopper 64 provided on the bracket 65, and is separated from the tightening roller 51.

The tension shooter 59 interlocking with the swing movement of the arm rod 57 is located at the position indicated by the solid line in FIG. 8, and the upper edge of the band exit of the band passage 41b between the tension shooter 59 and the tightening roller 51 is the band of the return shooter 1. The lower end of the supply band is located below the upper edge of the band entrance (the opening behind the band supply direction: the same applies hereinafter) of the passage 41a, and the leading end of the supply band is located at the band outlet (the opening ahead of the band supply direction: the same applies hereinafter) of the band passage 41b. It is formed so that it is smoothly and reliably fed into the band entrance of the band passage 41a.

Further, when the solenoid 55 is excited and the rod 56 slides the arm rod 57 upward in FIG. 8 and the tightening touch roller 54 comes into pressure contact with the tightening roller 51 to pull the band back, the tension shooter 59 sets the arm rod 57 To move upward, and the band passage 41b of the tension shooter 59
8 moves above the band entrance at the rear end of the band passage 41a of the return shooter 1 as shown by the two-dot chain line in FIG. 8, and the size of the band exit of the band passage 41b is equal to the band passage of the return shooter 1. The passage 41a is formed to be larger than the band entrance.

In FIG. 8, reference numeral 20 denotes a forward roller, which is supported on the substrate 5 by a drive shaft 23. The band outlet of the pool box faces a part of the outer periphery of the forward roller 20. Then, a forward rotation touch roller 21 slidably in contact with the forward rotation roller 20 and driven to rotate is provided so as to be able to press and separate freely. The drive shaft 23 of the forward rotation roller 20 has a shaft end protruding from the back surface of the substrate 5, and as shown in FIG. 9, a pulley 12 c for a flat belt is wedge-attached to the shaft end of the drive shaft 23. Flat belt 1 wound around pulley 12a of reverse rotation roller 10 described above.
4 and is driven to rotate in the same direction as the pulley 12a, that is, in the band supply operation direction.

The forward rotation touch roller 21 is supported by the tip of an eccentric shaft 24, and the rear end of the shaft 24 is fixed with a bolt near a bent portion at the center of an L-shaped operating rod 25. Is urged by a spring 26 so that the forward rotation touch roller 21 rotates in the direction of pressing against the forward rotation roller 20,
The other end of the operating rod 25 is connected to the end of the rod 28 of the solenoid 27. While the solenoid 27 is being excited, the forward rotation touch roller 21 is rotated by the forward rotation roller 2 against the spring 26.
When the excitation is released, the rod 28 rotates the operating rod 25 by the biasing force of the spring 26 so that the eccentric shaft 24 is pressed against the normal rotation roller 20 by the normal rotation touch roller 21.

Reference numeral 41c denotes a band passing path, which is constituted by the feed shooter 30 communicating between the gap between the normal rotation roller 20 and the normal rotation touch roller 21 and the gap between the tightening roller 51 and the tightening touch roller 54. The feed shooter 30 includes a curved fixed guide plate 15 integrally formed in an L-shaped cross section, and the fixed guide plate 15.
And a movable guide plate 16 having a curved shape and facing each other with a band-pass allowable gap therebetween.

The fixed guide plate 15 is fixed to the substrate 5 with one end facing a part of the outer periphery of the normal rotation roller 20 and the other end facing a part of the outer periphery of the tightening touch roller 54.

Various switches and display lamps In FIG. 3, when a start switch 125 on an operation panel provided with various switches on the upper surface of the packing machine main body is pressed, a start signal for starting the operation of the packing process is generated. 126
Is a stop switch. When the stop switch 126 is pressed, the connection to the power supply is cut off and the operation stops at any stage of the packing process. Reference numeral 127 denotes a power indicator lamp. When a power switch (not shown) is turned on, the indicator lamp 127 is always turned on.

Circuit Configuration Next, a circuit configuration will be described with reference to FIG.

The start switch 125 is connected to the control circuit unit 111, and a start signal generated by conducting the start switch 125 is supplied to the control unit 113.

The set band pool amount detecting means 80 and the band end detecting means 100 are provided by the limit switch 48 (FIG. 7).
And the limit switch 101 is connected to the control unit 113, and when the band pool amount in the pool box 161 is smaller than the set band pool amount, the limit switch 48 is
N and generates a set band pool amount non-existence detection signal,
The set band pool amount non-existence detection signal is transmitted to the control unit 113.
And the band end is set to the limit switch 10
After passing through 1, the band end detection signal is output to the control unit 113.

The stop switch 126 is connected to the controller 113
The stop signal generated by the operation of the stop switch 126 is supplied to the control unit 113.

The control circuit section 111 has a control section 113 and a drive control signal transmission section 116.
The display lamp 127 to which the signal from the controller is input is
3 is connected.

Drive circuit 1 for electromagnetic clutch 117 for camshaft
18, a drive circuit 119 for the camshaft electromagnetic brake 128,
A drive circuit 133 for the pool motor 129, another drive circuit 131 for controlling the cam 135, the tightening roller 51, and a motor 135 also serving as a rotation drive mechanism for the forward and reverse rollers 10, 20 are similarly driven by the drive control signal transmission unit 116. It is connected to the.

That is, the drive circuit 118 of the camshaft electromagnetic clutch 117, the drive circuit 119 of the camshaft electromagnetic brake 128, and the drive circuit 120 of the solenoid 87 of the reverse rotation touch roller 13 are connected to the drive control signal sending section 116, respectively. In addition, a drive circuit 121 for an electromagnetic clutch (not shown) of the tightening roller 51 and a drive circuit (not shown) for the solenoid 55 of the tightening touch roller 54, which will be described later, together with a drive circuit 124 for the solenoid 27 for the forward rotation touch roller.
Are similarly connected to the drive control signal transmission unit 116, respectively.

While the cam shaft makes one rotation from the original position, the following one packing process is performed.

9 and 11, the band guide 1
07 and the left gateway flap retreat (rearward in FIG. 11). Then, the right presser 81 as a press member is held between the slide table 9 by the right presser 81 to hold the band tip, and the band is tightened and retracted by the band supply tightening mechanism. That is, the right presser 81 in the press member rises, and the slide table is raised. 9, the front end of the band is gripped, the cam shaft stops once, the band is pulled back and tightened, the cam shaft rotates again, and the left side as a press member between the slide table 9 and After the band supply end is cut by the presser 83 and the band is gripped in the tightened state, a heater (not shown) on the heater crank 18 is inserted into the band overlap portion, the intermediate presser 82 rises, and the lower portion of the cutter provided on the intermediate presser 82 is moved downward. The blade 104 cuts the band supply end side straight and smoothly between the upper edge of the band passing hole 105 of the right presser 81 and the cutter upper blade. Is pressurized with a heater to melt (primary pressing step), then intermediate presser 82 is once lowered, unplugged heater again intermediate presser 82
Then, only the overlapping portion of the band is pressed and melted for a certain period of time (secondary pressing step), so that the slide table 9 retreats so that the article to be packed can be taken out.
Each member returns to the original position in FIG. 11 together with the band guide 107, the slide table 9, and the left bandway flap. The band is supplied to the band guide arch from the pool box by the band supply tightening mechanism according to the return detection signal. The above is one packing cycle. However, the control unit 113 receives the detection signal from the rotation angle detecting means 134 such as a limit cam that rotates synchronously with the cam shaft, controls the drive control signal transmission unit 116, and Outputs a signal to the drive circuit.

The mechanism for moving the band guide 107 and the slide table 9 forward and backward will be described in brief. The band is located below the slide table 9 when the band is supplied, and is retracted from below the slide table 9 when the band is pulled back and tightened. Further, the slide table 9 is also attached to a supporting member which is similarly slidably supported. The supporting member further engages with a trochanter provided on the retreating band guide arm after the secondary pressing step. Slide table 9 from above each press member
Retreats and returns to the original position as described above before the final step.

The camshaft electromagnetic clutch 117 transmits or releases the torque of the rotation drive means 135 to or from the camshaft, and the camshaft electromagnetic brake 128 instantaneously stops the rotation of the camshaft.

According to the above-described configuration, when the start signal from the start switch 125 is input while the set band pool amount non-existence detection signal of the set band pool amount detecting means 80 is being input, the start signal is output. Is output to the control unit 113.

Next, a description will be given with reference to the flowchart of FIG. First, an outline of a normal packing process will be described. Now, a band is placed around a packaged object through a band guide arch on a packing machine body (not shown) or manually, and a band cutting / welding mechanism is provided at a band end. And below the right, left and middle presses 81 to 83 (FIG. 9) as band pressing means.

The solenoid 55 is not excited, and the solenoid 27 is excited.
As shown by a two-dot chain line, the rod 28 of the solenoid 27 slides the operating rod 25 against the urging force of the spring 26,
The operating rod 25 separates the forward rotation touch roller 21 supported on the eccentric shaft 24 from the forward rotation roller 20, and the feed shooter 3
The band entrance facing the 0 normal rotation touch roller 21 is formed wide.

This state is a ready state. When the start switch (reference numeral 125 in FIG. 1) is turned on, it is converted into a start signal in the control circuit unit, and the drive circuits 118 and 119 drive the camshaft electromagnetic clutch (FIG. 3). The middle 117 is ON, the electromagnetic brake 128 is OFF, the camshaft 4 rotates, and the band tip is held between the slide table 8 by the band tip holding mechanism of the band welding mechanism, that is, the right presser 81.

At the same time when the start switch 125 is turned on, the camshaft rotation angle detecting means 13
4 is input to the control circuit unit 111 and converted into a reverse signal in the control circuit unit 111. With this reverse signal,
The camshaft electromagnetic brake 128 is turned on, and the camshaft electromagnetic clutch 117 is turned off.

Further, the driving circuit 120 is driven by the reverse rotation signal.
Then, the solenoid 87 is excited, and the rod 88 of the solenoid 87 slides the arm rod 98 against the urging force of the spring 94 to rotate the eccentric shaft 86 via the interlocking rod 91, the split pin 96, and the operating rod 90, The reversing touch roller 13 is the reversing roller 10
Press against

The band passage 41a of the return shooter 1
A pair of rollers 10, which are rotationally driven,
13 is pulled back at high speed (band primary tightening).

At this time, the solenoid 55 is not excited, and the band to be pulled back travels while smoothly sliding on the inner peripheral surface of the outer wall in the band passageway 41c of the tension shooter 59. Further, the solenoid 27 is excited, and in FIG. 9, the forward rotation touch roller 21 is separated from the forward rotation roller 20.

When the band escapes from the arch and is wound around the object to be packaged, the solenoid 55 is excited by a signal detecting this, and the arm 57 is rotated counterclockwise on the paper of FIG. The tightening touch roller 54 on the eccentric shaft 58 is pressed against the tightening roller 51. Also, the tightening roller electromagnetic clutch (not shown) is actuated by the signal, and the tightening roller 51 rotates at a low speed and a high torque via the tightening speed reducer 52.

A pulley 67b provided coaxially with the pulley 12b rotates via a V-belt 68 wound around a pulley 67a attached to the rear end of the drive shaft 22 of the tightening reduction gear 52. Since the rotation rotates the pulley 67b via a tightening roller electromagnetic clutch provided coaxially,
The tightening roller 51 rotates via a V-belt 68 and a pulley 67a (FIG. 9).

The excitation of the solenoid 87 is released momentarily behind the excitation of the solenoid 55, and the reverse rotation touch roller 13 is separated from the reverse rotation roller 10.
The elastic member 53 having a large frictional resistance is wound around and tightened (secondary tightening).

When the timer in the control circuit unit 111 which operates when the solenoid 55 is turned on expires, the drive circuit 121
, The tightening roller electromagnetic clutch of the pulley 67b is disconnected, the tightening roller 51 is stopped, and the drive circuits 118, 11
At 9, the camshaft electromagnetic clutch 117 operates again, the electromagnetic brake 128 is turned off, and the camshaft 4 rotates again.

The cam shaft 4 rotates again, the band supply end side is gripped between the left presser 83 and the slide table 9, and the cam shaft rotation angle detecting means 134 is also rotating. A signal is input and converted to a release signal.

With this release signal, the excitation of the solenoid 55 is released via the drive circuit 121, and the arm rod 57 returns to the original position, and the tightening touch roller 54 and the tightening roller 51 are released.
Is released, the tension state of the part is released, and the heater (not shown) on the heater crank 18 is inserted into the band overlapping part by the cam shaft 4 which continues to rotate, and Rises and the intermediate presser 8
The cutter lower blade provided at 2 holds the band supply end side to the right.
Is cut straight and smoothly between the upper blade of the cutter formed at the upper edge of the band passage hole 85, and the band overlap portion is pressed and melted together with the heater (primary pressing step). It descends and the heater is removed. When the cam shaft 4 rotates, the intermediate presser 82 rises again, and only the melted band overlap portion is pressed and fixed. The cam shaft that continues rotating retracts the slide table 9 from above the band cutting and melting and bonding means, and then returns to the original position on the band cutting and melting and bonding means again.

Further, the camshaft 4 rotates, and a detection signal is input from the camshaft rotation angle detecting means 134 to the control circuit 111 to be converted into a normal rotation signal. The electromagnetic brake 128 is turned on by the drive circuits 118 and 119 to which the forward rotation signal is input, the rotation of the camshaft 4 is stopped, the camshaft electromagnetic clutch 117 of the camshaft 4 is disengaged, and the drive circuit 124 is turned off.
Then, the excitation of the solenoid 27 is released and the forward rotation roller 20 is released.
The forward rotation touch roller 21 is connected to the spring 2 via a band.
6, the band of a predetermined length is supplied to the band guide arch on the upper surface of the main body by the timer as shown in steps S13a and 13b, and when the set time of the timer expires, the solenoid 27 is excited again to rotate the forward rotation touch roller 21. Move away from the forward rotation roller 20 and drive circuits 118 and 11
At 9, the electromagnetic brake 128 is turned off, and the camshaft electromagnetic clutch 117 operates again to rotate the camshaft 4 again.

When the camshaft 4 rotates, a signal is output from the camshaft rotation angle detecting means 134 to the control circuit section 111.
It is converted to the original position signal. With this home position signal, the camshaft electromagnetic clutch 117 is turned off and the electromagnetic brake 128 is turned off.
Stop at N.

At the same time when one step of packing is completed, preparations for the next packing are completed and the apparatus is on standby. That is, the above operation is repeated when the start switch 125 is turned ON.

Next, the operation in relation to the band end detection signal will be described.

In FIG. 2, in the normal packing process, when the packing operation is performed continuously, the band in the pool box 161 is continuously supplied to the band guide arch 12. When the roller 31 rotates frequently, the band of the band coil is frequently supplied into the pool box 161, and the limit switch 48 of the set band pool amount detecting means 80 generates the set band pool amount non-existence detection signal. It is possible to carry out packing by pressing the start switch 125 when in operation.

A normal one packing step is performed for each start signal.

A set band pool amount non-existence detection signal is generated from the limit switch 48 of the set band pool amount detecting means 80, and the band end detecting means detects that the band end is fed into the pool box 161. When the detection signal is output, it indicates that the band pool amount in the pool box 161 is small, but the band end is still in the pool box 161.

When the above two signals are output simultaneously,
In the packing step, the slide table 9 is not returned to the original position from the retreat limit, the camshaft 4 is stopped by the electromagnetic brake, and the slide table 9 stops at the retreat limit. That is, the detection signal is input to the control circuit unit 111 and converted into a forward rotation signal, and the drive circuit 118 or 119 to which the forward rotation signal is input receives the electromagnetic brake 128.
Turns ON, the rotation of the camshaft 4 stops, the camshaft electromagnetic clutch 117 of the camshaft 4 is disengaged, and the drive circuit 124
Then, the excitation of the solenoid 27 is released and the forward rotation roller 20 is released.
The forward rotation touch roller 21 is connected to the spring 2 via a band.
6, the band is not supplied to the band guide arch because there is no slide table at this time, and the timer operates to discharge the terminal band to the upper surface of the main body for a predetermined time by the timer as shown in steps S13a and 13b. .

That is, the normal rotation touch solenoid 27 of the band supply mechanism for supplying the band to the band guide arch which is the final step is set for a short time OF as described above.
Although the signal for F operation is output, the band in the pool box is discharged to the outside of the packing machine main body without being supplied to the band guide arch since the slide table 9 is stopped at the retreat limit.

Thereafter, a new band coil is set on the band reel, and the band tip is loaded into the band supply mechanism via the pool roller by a known means.

Next, when the start switch is turned on, the cam shaft rotates, and each member returns to the original position in the packing process.
That is, the slide table 9 is formed by pressing the press members 81 to 83.
Position it on top (FIG. 11). At the same time, the return to the original position is performed by the rotation angle detecting means 1 which rotates synchronously with the cam shaft.
The signal is input to the control unit 113 as a detection signal from the control unit 34, and is converted into a forward rotation signal. The excitation of the solenoid 27 is released, and the forward rotation roller 20 is forwarded to the forward rotation roller 20 via a band.
Are pressed by the spring 26, and the band is supplied to the band guide arch. Further, the drive mechanism of the pool roller rotates, the band is pooled in the pool box, and the apparatus is in a standby state.

When a start signal is input from the start switch 125 to the control unit 113, the start signal resets the band end detection signal and the set band pool amount non-existence detection signal in the control unit 113.

The next start signal is output to control section 113, and
The control unit 113 controls the drive control signal sending unit 116 to perform a normal packing process.

As described above, even if the operator generates the start signal without noticing, the end of the band is discharged outside the machine, and the band end in the pool box 161 is guided from the band exit of the pool box 161 to the band guide. Feeding to the arch is prevented.

[Brief description of the drawings]

FIG. 1 is a block circuit diagram showing an embodiment of the present invention.

FIG. 2 is a flowchart showing a flow of an operation according to the embodiment of the present invention.

FIG. 3 is a perspective view showing the entire packing machine provided with various switches according to the embodiment of the present invention.

FIG. 4 is a front view of a pool box showing the embodiment of the present invention.

FIG. 5 is a sectional view taken along line CC of FIG. 4;

6 is a sectional view taken along the line DD in FIG. 4;

FIG. 7 is an enlarged rear view of a main part of FIG. 4;

FIG. 8 is a front view of the device according to the embodiment of the present invention.

FIG. 9 is a rear view of the device according to the embodiment of the present invention.

FIG. 10 is an overall perspective view of a conventional packing machine.

FIG. 11 is a perspective view showing an original position of a band cutting / welding mechanism.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Return shooter 4 Cam shaft 5 Substrate 6 Fully automatic packing machine 7 Packing machine main body 8 Band reel 9 Slide table 10 Reverse rotation roller 11 Drive shaft (of 10) 12 Band guide arch 12a Pulley 12b Pulley 12c Pulley 13 Reverse touch roller 14 Flat belt Reference Signs List 15 fixed guide plate 16 movable guide plate 18 work table 20 forward rotation roller (feed roller) 21 forward rotation touch roller 22 (for tightening roller 51) drive shaft 23 (for forward rotation roller 20) drive shaft 24 eccentric shaft 25 operating rod 26 Spring 27 Solenoid (for forward rotation touch roller) 28 Rod 30 Feed shooter 31 Pool roller 32 Pool box 33 Drive roller 34 Idling roller 35 Pool shooter 37 Outer plate 41a Band passage 41b Band passage 41c Van Passing path 43 Belt 44 Reducer 45 Balance bar 46 Shaft 47 Sleeve 48 Limit switch 49 Balance bar spring 51 Tightening roller 52 Tightening reducer 54 Tightening touch 55 Solenoid (for tightening roller) 56 Rod 57 Arm rod 58 Shaft 59 Tension shooter 60 Pin 61 Long hole 62 Guide pin 63 Reinforcement plate 64 Stopper 65 Bracket 66 Shaft 67 Insertion hole 67a Pulley 67b Pulley 68 V belt 71 Back pool box 72 Hinge 73 Back pool plate 74 Partition plate 75 Band passage 80 Set band pool amount detecting means 81 Right presser 82 Middle presser 83 Left presser 84 Pin 85 Cover 86 Eccentric shaft 87 Solenoid (for reverse touch roller) 88 Rod 90 Operating rod 91 Interlocking rod 92 U-shaped groove 94 Pulling 95 Connecting piece 96 Split pin 98 Arm rod 99 Bracket 100 Band end detecting means 101 Limit switch 104 Cutter 105 Band passing path 107 Band guide 111 Control circuit section 112 Counter 113 Control section 115 Tension arm 116 Drive control signal sending section 117 Camshaft Electromagnetic clutches 118 to 120, 124, 131, 133 Drive circuit 125 Start switch 126 Stop switch 127 Indicator lamp 128 Electromagnetic brake for cam shaft 129 Pool motor 134 (Cam shaft) Rotation angle detecting means 135 Forward / reverse rotation roller driving / tightening roller driving And camshaft drive motor 161 Pool box 162 Stepped pin 163 Front plate 188 Adjustment bolt 189 Screw 191 Lock hole 192 Limit switch bracket Returned from 193 194 Slot 195 Bolt 631 Flange piece 811 Base 861 Lead piece

Claims (3)

[Claims] 1. A band supply mechanism for supplying a band into a band guide arch attached to a packing machine main body through a band outlet, and a band of a band coil mounted on a band reel is connected to the band inlet through a band inlet. In the vicinity, a pool roller having a rotation driving means is supplied into the pool box, and the band pool amount in the pool box is set by the set band pool amount detecting means for detecting that the band amount in the pool box is less than the set band pool amount. With the step of controlling the set band pool amount and the start signal of the start switch, the band guide located below the original slide table is retracted, the band tip is grasped, and the band in the band guide arch is tightened by the band tightening mechanism. Pull back the band and tighten the items to be packed. Pressing the material to cut the band supply end, further welding the band overlapping portion, then release the pressing of the press member, retreat the slide table, packing the object to be packed with the band, In the above-mentioned packing method, each of the members is returned to the original position, and the band in the pool box is supplied to the band guide arch by the band supply mechanism in a one-cycle process. The start during the generation of the band end detection signal for detecting that the band end of the band coil has been supplied into the pool box, and the set band pool amount detecting means is generating the set band pool amount absence detection signal. After the pressing of the press member is released by a start signal generated by closing a switch, the slide table is moved to the slide table. The band in the pool box is discharged by a band supply mechanism to discharge at least a part of the band at the end to the outside of the packing machine body. 2. A start signal generated by closing the start switch while the band end detection signal is being generated and the set band pool amount detection means is generating the set band pool amount non-existence detection signal. After the pressing of the press member is released, the slide table is stopped at the retreat limit of the slide table, the band supply mechanism is operated for a set time, and the terminal band in the pool box is discharged out of the packing machine body. The method for discharging a band end in a packing machine according to claim 1. 3. A band coil is newly mounted on the band reel after the band supply mechanism is stopped after operating for a set time, and a band is supplied to the band supply mechanism communicating with a band inlet and a band outlet of the pool box. After loading
By closing the start switch, the slide table is returned to the original position, and then the rotation driving means for supplying the band of the band coil mounted on the band reel into the pool box is operated, and the band is pooled, and The band end discharging method in the packing machine according to claim 1, wherein a band supply mechanism for supplying a band in the pool box to a band guide arch is operated.