JPH063804U - Band pool amount detector in packing machine - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To reduce the variation in the amount of band pool and improve the durability of the limit switch. [Structure] The balance box 81 faces the openings of the lower edges of the two plate members 44 and 63 of the pool box 61, and the pool box 61
The shaft 82 is slidable in and out of the shaft. Pool box 6
When there is no band in 1, the locking hole 91 provided in the plate member 44
The pin 84 inserted therein is biased via the spring 87 and constantly presses the limit switch 86 provided on the back surface of the plate member 44, but the pressing force thereof is restricted by the locking hole 91. When the pool motor is activated by the detection signal and the band to be fed reaches a predetermined amount, the balance bar 81 causes the spring 8 to move.
Swing out of the pool box 61 against the urging force of 7,
The pin 84 moves slightly away from the limit switch 86 and the band pool stops. When the band in the pool box 61 is exhausted, the pin 84 pushes the limit switch 86 to feed the band.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a band pool amount detecting device for detecting a pool amount of a band for storing a band to be supplied to a band guide arch on a body of a packing machine in a pool box.

[0002]

[Prior art]

 As shown in FIG. 8, 10 is a so-called vertical type fully automatic packing machine, which is a known mechanism for supplying the band, gripping the tip side, pulling back the supply side, tightening, cutting, and adhering the band overlapping portion. Main body 11 in the form of a substantially rectangular box having a built-in control unit 50, and a downwardly-facing U-shape extending across the longitudinal edges at the center of the work table 18 placed on the upper surface of the main body 11. The band guide arch 12 of the main body 11 and the band reel 13 provided on one side surface in the longitudinal direction of the main body 11 on which the band coil can be loaded in the direction orthogonal to the band guide arch 12, and the band guide arch 12 of the main body 11 A pool unit 30 composed of a pool feed unit 20 for feeding the coiled band loaded on the band reel 13 into the pool box 21 is provided on the side surface of the same plane as the pool unit 30. Eteiru.

Pool unit 30 As shown in FIG. 9, the pool box 21 constituting the pool unit 30 is one plate member having a horizontally long rectangular shape, and one surface of the front plate 43 is attached to the body outer plate 44 with a width smaller than the band width. It is formed in a box shape so as to face each other in parallel with a large gap therebetween, and at least a larger amount of bands than the amount of bands supplied to the band guide arch 12 in one package can be accommodated in the pool box 21. It is formed to the size that can be.

Reference numeral 14 denotes a back pool, which is formed in a box shape from a plate member 39 facing the body outer plate 44 with a gap slightly larger than the band width, like the pool box 21, and is formed in a box shape, and a substantially lower half thereof is adjacent to the pool box 21. To communicate with the internal space to form a part of the pool box, and the upper half of the band is opposed to the rear plate 46 on the outer plate 44 via the gap, and faces the tension arm 15 to be described later, and the band outlet 49. Are formed (Fig. 10). A door lid 45 is provided on the upper side edge of the plate member 39 by a hinge so as to face the projecting piece 46 'of the rear plate 46 and to open and close the space of the portion. That is, the band outlet 49 is on the extension line of the upper edge of the front plate 43 in the space of the back pool 14.

Pool feed unit 20 As shown in FIG. 11, the structure of the pool feed unit 20 provided at the lower end of the pool box 21 is such that the drive roller 22 is provided through a shaft supported by bearings in the bearing case 25. Is connected to a pulley 31 by means of a V-belt 32. The floating roller 23 is supported by an eccentric shaft 24. A lever 47 is attached to one end of the eccentric shaft 24, and an adjuster pin 27 is inserted into the other end. One end of a spring 38 is connected to the lower end of the adjuster pin 27, and the other end of the spring 38 is connected to a spring hook 36 attached to the bearing case 25. The spring 38 always rotates the eccentric shaft 24 in a fixed direction (clockwise direction in FIG. 11) via the adjuster pin 27, thereby sliding the floating roller 23 to the drive roller 22.

A band bar amount detecting means eccentric shaft 24 is movably supported by a balance bar 29 having an L-shaped cross section which is a detecting means for detecting the presence or absence of a predetermined band pool amount. The balance bar 29 is the pull box. 21 is inserted. An interlocking rod 28 is projectingly provided on the balance bar 29, one end of a spring 37 is connected to the tip of the interlocking rod 28, and the tip of an adjusting bolt 34 is connected to the other end of the spring 37. Then, the adjusting bolt 34 is attached so as to be able to move forward and backward within the screw hole of the disk member 35, and the pulling force of the spring 37 for pulling the interlocking rod 28, that is, the balance bar 29 upward in accordance with the movement of the adjusting bolt 34. Is adjusted.

On the lower surface of the bearing case 25, a limit switch 41 that detects the presence or absence of a predetermined amount of band pool and generates a detection signal is provided below the tip of the interlocking rod 28 with its lead piece 411 facing. That is, when the balance bar 29, that is, the interlocking rod 28 is slid downward by the tension (waist) of the band in the pool box 21 and comes into contact with the lead piece 411 of the limit switch 41, a predetermined band pool amount presence detection signal is detected. When the pool motor is turned off by this signal and the driving roller 22 is stopped by this signal, and conversely, the band in the pool box 21 is consumed and the pool amount is below a predetermined pool amount, the balance bar 29, that is, the interlocking rod 28 is It swings upward and separates from the lead piece 411 of the limit switch 41 to generate a predetermined band pool amount absent detection signal, and the pool motor is turned on to rotate the drive roller 22.

Reference numeral 26 is a pool shooter having a groove portion for passing a band.

Further, the tension arm 15 is swung by the rotation of the cam to tighten the band. The entrance of the band guide groove formed on the upper part of the tension arm 15 is supported so as to face the opening edge of the band exit 49 of the back pool 14 when the tension arm 15 is swung (FIG. 8).

In the device having such a configuration, when loading the band, the brake of the band reel 13 is released, the band of a desired length is pulled out from the band coil of the band reel 13, and the lever 47 is moved counterclockwise in FIG. It rotates in the rotating direction to release the pressure contact of the floating roller 23 to the drive roller 22 by the spring 38 to form a gap between the rollers 22 and 23, and the band tip from the pool shooter 26 to the idle roller 23 and the drive roller. 22 is inserted between the front plate 43 and the plate member 39 and guided to the tension arm 15 in the door lid 45, and then the band is supplied to the outside of the main body and is pulled back. Insert into 8).

Since the band loading is completed and the band is not yet pooled in the pool box 21, the balance bar 29 is at the position of the dotted line in FIG. 10 by the spring 37, and the floating roller 23 is provided with the spring 38. It is in a state of being constantly in sliding contact with the driving roller 22 under the force.

When the motor power is turned on, the tip of the interlocking rod 28 is separated from the lead piece 411 of the limit switch 41 by the bias of the spring 37, so that the pool motor turns ON and the drive roller 22 rotates. As a result, the floating roller 23, which is in sliding contact with the drive roller 22 by the bias of the spring 38, also rotates through the band, and the band reel 13 is rotated to feed the band into the pool box 21. When the band in the pool box 21 reaches a predetermined amount and the balance bar 29 as a detecting means is slid downward in FIG. 10 due to the tension (waist) or weight, the interlocking rod 28 integrated with the balance bar 29 is displayed. 10 Slide counterclockwise in the plane of the drawing and contact the lead piece 411 of the limit switch 41. At the same time, a predetermined band pool amount detection signal is generated, the pool motor is turned off by this signal, and the feeding of the band into the pool box 21 is stopped.

Next, when the band pooled in the pool box 21 is supplied into the band guide arch 12 and the amount of the band in the pool box 21 decreases, the balance bar 29 and the interlocking rod 28 rotate clockwise in FIG. The tip of the band moves away from the lead piece 411 of the limit switch 41, the pool motor is turned on again by this signal, the drive roller 22 and the idler roller 23 rotate, and the band is fed into the pool box 21. Then, when a predetermined amount of bands are pooled, the balance bar 29 is again pushed downward, and the band feeding is stopped in the same manner as described above.

As described above, by supplying the band to the band guide arch 12, the above operation is repeated as the number of hands in the pool box 21 decreases, and the band amount in the pool box 21 is maintained at a predetermined amount.

[0015]

In the conventional band pool amount detecting device in the packing machine, as described above, the amount of pool is adjusted by operating the adjusting bolt 34, that is, the tension force of the spring 37, that is, the swinging of the balance bar 29. The position of the balance bar 29 before the band is supplied into the pull box 21 differs depending on the pool amount setting.

Therefore, the band reaches a predetermined amount in the pool box 21, and the tension (waist) or weight of the band causes the balance bar 29 to start oscillating counterclockwise in FIG. 10 against the urging force of the spring 37. After that, a slight delay occurs until it abuts the lead piece 411 of the limit switch 41 and the pool motor is turned off to stop the band feeding into the pool box 21, so that the band pool amount varies greatly. There was a problem that it was not stable.

Further, since the movement distance until the interlocking rod 28 comes into contact with the lead piece 411 of the limit switch 41 after the start of the sliding movement of the balance bar 29 is large, the impact of the tip of the interlocking rod 28 on the limit switch 41 is large. Therefore, there is a problem that the durability of the limit switch 41 is reduced.

In addition, the pool state of the bands pooled in the pool box 21 changes into various shapes for each pool, so the tension (waist) of the band that swings the balance bar 29, the weight and the pool amount ( The relationship with the band pool length) is unstable. However, the tension (waist) of the band and the action of the weight are different between the front end side and the rear end side of the balance bar 29 due to the relation of the moment. That is, when the band is mainly pooled on the tip end side of the balance bar 29, the balance bar 29 is slid even if the amount of pooling of the band is small, but the band is mainly slanted on the rear end side of the balance bar 29 toward the swing axis. The balance bar 29 is not swung when the pool amount is small when the pool is pooled. However, in the conventional apparatus, the amount of the pool pooled near the tip of the balance bar 29 located on the side opposite to the band inlet of the pool box 21 is relatively large, and the pooled state of the band changes variously as described above. Therefore, there is a problem in that a slight change in the pool state of the band makes the oscillating motion of the balance bar 29 unstable, resulting in a large variation in the pool amount of the band (pool length of the band). That is, there was a problem that the pool amount of the band was not always stable.

The present invention was developed in order to solve the above-mentioned problems, and reduces the variation in the amount of band pool in the pool box to stabilize it and improve the durability of the limit switch. An object is to provide a detection device.

[0020]

[Means for Solving the Problems]

 In order to achieve the above object, the band pool amount detecting device in the packing machine of the present invention has a band entrance through which the band passes and a band exit 49 for supplying to the band guide arch 12 attached to the packing machine body 11, and A pool box 61 is provided in which a main body outer plate 44 that forms one of the two plate members and a front plate 63 that forms the other plate member face each other in a horizontal manner at a predetermined interval. Further, a pair of pool rollers for supplying a band into the pool box 61, a driving roller 22 and a floating roller 23, are provided in the vicinity of the band entrance, and a pool motor as a rotation driving means for rotating the driving roller 22 is provided. Further, facing the opening of the lower edges of the two plate members 44, 63 of the pool box 61, the balance bar 81 is slidably supported inwardly and outwardly of the pool box 61, and on the sliding locus of the balance bar 81, A limit switch 86 is provided at the rear of the balance bar 81 in the direction of sliding outward of the pull box 61. Then, the limit switch 86 is urged to constantly press the balance bar 81 via the balance bar spring 87, and the urging force of the balance bar spring 87 is adjustable. Further, the rotation driving means is stopped by the detection signal of the limit switch for detecting that the balance bar 81 is separated from the limit switch 86, and the rotation of the pool roller is stopped.

Further, it is also possible to provide a stopper for controlling the sliding motion of pressing the limit switch 86 of the balance bar 81.

Further, one plate member 44 of the pool box 61 is provided with a locking hole 91 as the stopper, and a pin 84 which is inserted into the locking hole 91 is projectingly provided on the balance bar 81. The limit switch 86 may be provided on the rear surface of the one plate member 44 and behind the balance bar 81 in the direction of the outward movement of the pool box on the movement locus of the pin 84.

Further, the swing shaft 82 of the balance bar 81 may be provided below the pool box 61 on the side opposite to the band inlet side, and the tip of the balance bar 81 may be disposed below the band inlet side.

[0024]

[Action]

 When there is no band in the pool box 61, the balance bar 81 is slid toward the inside of the pool box 61 by the urging force of the balance bar spring 87, and the balance bar 81 always operates the limit switch 86 located on the swing locus of the balance bar 81. Although the balance bar 81 is being pressed at this time, the pressing force of the balance bar 81 is regulated by the locking hole 91 serving as a stopper via the pin 84.

Therefore, when the pool motor, which is the rotation driving means for rotating the pool roller, is operated, the band is fed into the pool box 61 by the pool rollers 22 and 23. At this time, the band moves on the balance bar 81 from the band inlet side of the pool box 61 to the side opposite to the band inlet side, and the swing shaft 82 of the balance bar 81 which is not affected by the variation in the pool state of the band is compared. The larger the pool is, the smaller the pool pool is, and the smaller the pool pool is.

When the pool of the band reaches a predetermined amount, the tension (waist) and weight of the band swing outwards of the pool box 61 against the urging force of the balance bar spring 87 of the balance bar 81. The pin 84 is slightly away from the limit switch 86. Then, the pool motor is stopped by the signal for detecting this, so that the band feeding into the pool box 61 is stopped. When the band in the pool box 61 is supplied to the band guide arch, the balance bar 81 is slid toward the inside of the pool box 61 by the urging force of the balance bar spring 87, and the pin 84 of the balance bar 81 is moved to the limit switch 86. Pressing, the pool motor is rotated by this detection signal, and the pull rollers 22, 23 start feeding the band into the pool box 61, and this operation is repeated. Therefore, as described above, the swinging movement of the balance bar 81, that is, the pin 84 does not give a shock to the limit switch 86, and the slight movement of the balance bar 81 causes the limit switch 86 to operate immediately. Therefore, the variation in the amount of band pool is small and stable.

[0027]

【Example】

 Hereinafter, a detailed embodiment of the present invention will be described with reference to the drawings, while omitting portions similar to those of the conventional embodiment. FIG. 1 shows a pool unit 60 provided on the same side surface as the band guide arch 12 of the packing machine body 11. A pool box 61 constitutes a part of the pool unit 60. The pool unit 60 is a pool feed unit 20 for feeding the band of the band coil loaded on the band reel 13 to the pool box 61 and a band pool amount detecting means for detecting the presence or absence of a predetermined band pool amount in the pool box 61. It is composed of 80.

The pool box 61 pool box 61, as shown in FIG. 1, one surface of the other plate Der Ru front plate 63 forming a horizontally long rectangle, slightly more bandwidth to one of the plate serving as the body skin 44 Formed in a box shape by facing each other in parallel with a large gap therebetween, and in this pool box 61, a larger amount of bands than the amount of bands supplied to the band guide arch 12 in at least one package can be accommodated. Formed in size.

Reference numeral 62 denotes a stepped pin, which has a cylindrical shape having a through hole through which a bolt 65 can be inserted, as shown in FIG. 7, and has a plurality of endless annular grooves 64 a, 64 b, 64 c, 64 d on the outer circumference. Are provided at appropriate intervals in the axial direction, and four stepped pins 62 are projected on the outer plate 44 near each corner of the rectangle of the pull box 61, and fixed with bolts 65 and two nuts 66. There is. The width of each groove 64a, 64b, 64c, 64d of the stepped pin 62 is provided so that it can be inserted in the plate thickness direction of the front plate 63, and each groove 64a, 64b, 64c, from the mounting surface to the outer plate 44. Distances La, Lb, Lc, and Ld up to 64d correspond to band widths of 6 mm, 9 mm, 12 mm, and 15 mm of bands generally used for packing machines, and La = 8 mm, Lb = 11 mm, Lc = 14 mm, Ld. = 17 mm. These distances La, Lb, Lc, and Ld are the sizes of the gaps between the body outer plate 44 and the front plate 63.

As shown in FIGS. 1 and 7, the front plate 63 has flange pieces 631, 631, 631, 631 formed in a bent shape at each end of a horizontally long rectangle to increase the rigidity of the front plate 63. Further, the front plate 63 has a stepped portion at a position corresponding to the four stepped pins 62, 62, 62, 62 projecting from the outer plate 44 near each corner of the rectangle, as shown in FIG. Four insertion holes 67, 67, 67, 67 capable of inserting the pin 62 are provided, and the upper end edge of each insertion hole 67 can be inserted into each groove 64a, 64b, 64c, 64d of the stepped pin 62. A semi-circular notch 68 is formed.

Reference numeral 71 denotes a back pool box, and like the pool box 61, a back pool plate 73 faces the main body outer plate 44 with a gap slightly larger than the band width. The front plate 63 is provided on one edge of one side of the rectangle, which is openable and closable via hinges 72, 72, and is a part of the pool box that is adjacent to the pool box 61 and communicates with the internal space. is there. In FIG. 1, a partition plate 74 having an L-shaped cross section attached to the outer plate 44 covers the lower part of the gap of the back pool box 71 to prevent the band from protruding. It should be noted that even if there is some gap between the lower end edges of the partition plate 74 and the back pool plate 73, the band does not stick out and there is no problem. Further, since the back pool plate 73 of the back pool box 71 is connected to the front plate 63 by the hinges 72, 72, if the front plate 63 is moved and the gap of the pool box 61 is changed, the back pool plate 73 also moves. Therefore, the back pool box 71 is also changed to the same gap as the pool box 61 according to the band width.

Pool Feed Unit 20 The pool feed unit 20 is provided below the back pool box 71 as shown in FIG. 1, and is basically the same as that described in the prior art, and the pool shooter 26 provided on the side surface. A band passing path 75 that communicates the band inlet of the above and the inside of the pool box 61 faces the peripheral surface of the drive roller 22 that is driven to rotate by a pool motor (not shown) and the idle roller 23 that can be pressed into contact with and separated from the drive roller 22. It is a thing.

Band Pool Amount Detecting Means 80 The band pool amount detecting means 80 in FIG. 1 has an L-shaped cross section which is a detecting means for detecting the presence or absence of a predetermined band pool amount on the shaft 82 protruding from the body outer plate 44. The balance bar 81 is slidably supported, and the balance bar 81 is arranged below the lower edge opening between the outer plate 44 and the front plate 63 of the pool box 61 and balances with the lower edge of the front plate 63. There is a gap between the bars 81 (Fig. 4). Reference numeral 85 denotes a cover, which is located below the front plate 63 and covers almost the entire surface of the body outer plate 44 of the pool box 61 with a bolt 97 via a block 96 in the opposite direction of the body outer plate 44 of the balance bar 81. The band pooled on the balance bar 81 is prevented from popping out.

The balance bar 81 is, as shown in detail in FIGS. 2 and 3, a tip of a short block-shaped base portion 811 that is supported by a shaft 82 protruding on the surface of the outer plate 44 via sleeves 83, 83. Further, one end of a long balance bar 81 having an L-shaped cross section is fixed with screws 89, 89. The base portion 811 of the balance bar 81 is located below the band entrance of the pool box 61 by the pool rollers 22 and 23, that is, in the band passage 75 through which the band of the band coil is fed into the pool box 61. The shaft 82 is supported at the farthest position from the band exit, and the tip of the balance bar 81 is below the band entrance side of the pool box 61, that is, the pool box 61 near the band exit of the band passage 75. It is located below.

The width of the balance bar 81 is formed larger than the width between the outer plate 44 of the pool box 61 and the front plate 63, and even if the front plate 63 is moved to change the gap of the pool box 61. I am trying to be able to deal with it sufficiently.

Further, the balance bar 81 has a pin 84 projecting from the tip of the base portion 811 substantially parallel to the axial direction of the shaft 82, and the tip of the pin 84 is a locking hole 91 provided in the body outer plate 44. It is inserted into the inside and protrudes to the back surface of the body outer plate 44 of the pool box 61. The locking hole 91 is a stopper that restricts the sliding motion of pressing the limit switch of the balance bar.

Further, as shown in FIG. 4, the pin 84 connects one end of a balance bar spring 87 to the tip thereof, and the other end of the balance bar spring 87 through a twist return 93 such as used in fishing gear. One end of the adjusting bolt 88 is connected, and the other end of the adjusting bolt 88 is screwed into a nut fixed to the plate material of the main body 11 by welding.

The balance bar 81 is constantly urged by the balance bar spring 87 so as to oscillate inward of the pool box 61, and the pin 84 of the balance bar 81 abuts on the upper edge of the locking hole 91. Therefore, the swinging movement of the balance bar 81 is restricted. The biasing force of the balance bar spring 87 is adjusted by rotating the adjusting bolt 88. Further, as shown in FIG. 5, the limit switch 86 is attached to the back surface of the outer plate 44 via the limit switch bracket 92 so that the lead piece 861 can be pressed on the sliding locus of the pin 84. The limit switch 86 is provided behind the pool bar 61 in the direction in which the balance bar 81 is slid outward, and the lead piece 861 of the limit switch 86 has the pin 84 at the upper edge of the locking hole 91. At the abutting position, the balance bar spring 87 is always urged to press. The limit switch bracket 92 is provided with two elongated holes 94, 94, and bolts 95, 95 are screwed into the elongated holes 94, 94 on the back surface of the outer plate 44 so that the limit switch bracket 92 can be moved vertically. The position where the limit switch 86 fixed to the bracket 92 contacts the pin 84 of the lead piece 861 can be finely adjusted.

The balance bar 81 is not limited to the one arranged below the lower edge of the front plate 63 of the pool box 61 as described above, but may be the front plate 63 and the outside of the main body as shown in the conventional embodiment. It may be provided so as to be slidable inward and outward of the pool box 61 in a gap with the plate 44.

[0040] In the apparatus of the action described such an arrangement of the embodiment, the loading of the band is pulled out a band of desired length from the band coil of the band reel 13 to release the brake band reel 13, in FIG. 1 The tip of the band is inserted from the band inlet of the pool shooter 26 into the band passage 75 through the space between the floating roller 23 and the drive roller 22, the back pool plate 73 of the back pool box 71 is opened, and the pool exit from the band outlet of the band passage 75. The band is guided to the tension arm 15 through the space between the box 61 and the back pool box 71, and then the band is supplied to the outside of the main body, and the band is inserted into a feed unit (FIG. 3) composed of a pair of feed rollers 51 to be pulled back.

Since the band loading is completed and the band is not yet pooled in the pool box 61, the balance bar 81 is rotated counterclockwise in FIG. 1 by the balance bar spring 87 (FIG. 4). It is in the moved position. That is, in FIG. 5, which is an enlarged rear view of the main part of FIG. 1, the pin 84 of the balance bar 81 is pulled clockwise by the urging force of the balance bar spring 87, and the pin 84 is moved to the limit switch 86. The contact piece 861 comes into contact with the lead piece 861 and is pressed, and the sliding movement of the pin 84 comes into contact with the upper edge of the locking hole 91 and stops. At the stop position of the pin 84, the limit switch bracket 92 is moved up and down in the long holes 94, 94 so that the contact of the limit switch 86 is pressed by the pin 84 via the lead piece 861 so that the position of the limit switch 86 is changed. adjust. Further, the adjusting bolt 88 is rotated to adjust the strength of the urging force of the balance bar spring 87 so that a desired band pool amount can be pooled. The floating roller 23 is always in sliding contact with the drive roller 22.

When the motor power is turned on, the lead bar 861 of the limit switch 86 is pressed by the bias of the balance bar spring 87, so the pool motor is turned on and the drive roller 22 rotates. As a result, the floating roller 23, which is in sliding contact with the drive roller 22, also rotates via the band, and the band reel 13 is rotated to feed the band B into the pool box 61 as shown by the chain double-dashed line in FIG. . Then, the band in the pool box 61 reaches a predetermined amount, and the tension (waist) or weight thereof causes the balance bar 81 as a detecting means to oscillate in the clockwise direction on the paper surface of FIG. 1, that is, in the counterclockwise direction on the paper surface of FIG. The pin 84 is slid to slightly separate from the lead piece 861 of the limit switch 86. At the same time, a predetermined band pool amount detection signal is generated, and the pool motor is turned off by this signal to stop the band feeding into the pool box 61.

At this time, the band fed by the drive roller 22 and the idler roller 23 is fed on the balance bar 81 from the band inlet side of the pool box 61 to the side opposite to the band inlet in FIG. It hits the left side plate of the pool box 61, is then pushed up to the upper right, and alternates left and right in a curved shape. Next, the band tends to overlap mainly on the side opposite to the band entrance of the pool box 61. Therefore, since the swing shaft 82 on the rear end side of the balance bar 81, which is less affected by the change in the band pool state than on the front end side of the balance bar 81, is located below the pool box at the side opposite to the band inlet, The variation in the amount of band pool is relatively small.

Further, even if the urging force of the balance bar spring 87 is increased, the pin 84 contacts the upper edge of the locking hole 91 and the pressing force of the limit switch 86 on the lead piece 861 is regulated. The urging force of the balance bar spring 87 does not affect the limit switch 86, and the pin 84 does not change from the state of being in contact with the upper end edge of the locking hole 91 until a predetermined band pool amount is reached. Moreover, when the pin 84 reaches the predetermined band pool amount and moves away from the lead piece 861 of the limit switch 86 to the lower side of the drawing in FIG. 5, the feeding of the band into the pool box 61 is stopped, so that the balance bar 81 is moved downward. Since the swinging motion is stopped, the moving distance of the pin 84 is short.

Next, when the bands pooled in the pool box 61 are supplied into the band guide arch 12 and the amount of bands in the pool box 61 decreases, the balance bar 81 rotates counterclockwise in FIG. That is, the balance bar 81 is swung in the counterclockwise direction in the plane of the paper of FIG. 5, the pin 84 abuts and presses the lead piece 861 of the limit switch 86, and stops at the upper edge of the locking hole 91. With this signal 86, the pool motor is turned on again, the drive roller 22 and the idler roller 23 rotate, the band is fed into the pool box 61, and when the predetermined amount of band is pooled thereafter, the balance bar 81 moves downward again. To stop feeding the band in the same manner as above. Therefore, as described above, since the swinging movement of the balance bar 81, that is, the movement distance of the pin 84 is short, there is no impact on the limit switch 86 and the durability of the limit switch 86 is improved.

As described above, by supplying the band to the band guide arch 12, the above operation is repeated in accordance with the decrease of the band in the pool box 61, and the band amount in the pool box 61 is maintained at a predetermined amount.

The supply side of the band pulled back by the feed roller 51 after being supplied to the band guide arch 12 and tightened by the tension arm 15 is integrated with the pool box provided in the main body 11 in a somewhat slack state. Alternatively, it is pooled in the back pool 71 adjacent to this (FIG. 1).

As another embodiment, one end of a balance bar spring 87 similar to that of the above-mentioned embodiment is connected to the tip of the balance bar 81, and the balance bar spring 87 moves the balance bar 81 to the inside of the pool box 61. The lead bar 861 of the limit switch 86 is pushed by the tip of the balance bar 81 toward the rear of the balance bar 81 in the direction of the outward movement of the pool box 61 on the trajectory of the balance bar 81. A stopper that restricts the operation of the balance bar 81 to press the lead piece 861 of the limit switch 86 may be provided so as to engage with the tip of the balance bar 81.

[0049]

[Effect of device]

 Since the present invention is configured as described above, it has the following effects.

(1) The balance bar facing the opening of the lower edge of the second plate of the pool box is slidably supported inward and outward of the pool box, and on the trajectory of the balance bar outwards and outwards of the pool box of the balance bar. A limit switch is provided at the rear of the swinging direction, and the limit switch is urged to constantly press the balance bar through the balance bar spring, and the urging force of the balance bar spring is adjustable so that the balance bar Is set so that the rotation of the pool roller is stopped by the detection signal of the limit switch that detects that it has separated from the limit switch, so the swinging movement of the balance bar is small Feeding of the inner band will stop. Therefore, it was possible to provide a band pool amount detection device capable of reducing the variation in the amount of band pool in the pool box and improving the durability of the limit switch.

(2) Since the stopper for restricting the swinging motion of pressing the limit switch of the balance bar is provided, the pressure of pressing the limit switch does not change even if the biasing force of the balance bar spring is changed. , It was possible to provide a band pool amount detection device that does not reduce the durability of the limit switch.

(3) An engaging hole that serves as the stopper is provided in one plate member of the pool box, and a pin that is inserted into the engaging hole is projectingly provided on the balance bar, and the pin is attached to the plate member of the one plate member. For the same reason as in (1) above, the band inside the pool box was projected because it was located on the rear side of the balance bar and slid out of the balance box on the rear of the balance box. It has been possible to provide a band pool amount detection device capable of reducing the variation in the pool amount and improving the durability of the limit switch.

(4) Since the oscillating shaft of the balance bar is provided below the band entrance of the pool box and the tip of the balance bar is located below the band entrance, Since the fed bands are pooled in a relatively large amount in order from above the sliding shaft side of the balance bar located on the lower side of the pool box on the opposite side to the band inlet, it has a relatively large effect on the pool state of the band. We were able to reduce the variation in the amount of band pool in the pool box without receiving it.

[Brief description of drawings]

FIG. 1 is a front view of a pool box of the present invention.

FIG. 2 is an enlarged front view of the essential parts of the pool box of the present invention.

FIG. 3 is a sectional view taken along line CC in FIG.

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

5 shows a rear view of FIG.

FIG. 6 is an enlarged view of a main part of the pool box of the present invention.

7 is a sectional view taken along line BB of FIG.

FIG. 8 is an overall perspective view of a conventional packing machine.

FIG. 9 is an exploded perspective view of a pool box in a conventional packing machine.

FIG. 10 is a perspective view of the entire pool unit in the conventional packing machine.

FIG. 11 is an exploded perspective view of a pool feed unit in a conventional packing machine.

[Explanation of symbols]

 11 Packing Machine Main Body 12 Band Guide Arch 13 Band Reel 14 Back Pool 15 Tension Arm 18 Working Table 20 Pool Feed Unit 21 Pool Box 22 Drive Roller 23 Floating Roller 24 Eccentric Shaft 25 Bearing Case 26 Pool Shooter 27 Adjuster Turbine 28 Connecting Rod 29 Balance Bar 30 Pool unit 31 Pulley 32 V belt 34 Adjustment bolt 35 Disc member 37 Spring 38 Spring 39 Plate material 43 Front plate 44 Outer plate 45 Door lid 46 Rear plate 47 Lever 49 Band outlet 50 Control unit 53 Gap 54 Flange piece 55 Female screw 60 pool unit 61 pool box 62 stepped pin 63 front plate 64a, 64b, 64c, 64d groove 65 Lt 66 nut 67 insertion hole 68 notch 71 back pool box 72 hinge 73 back pool plate 74 partition plate 75 band passage 80 band pool amount detecting means 81 balance bar 82 shaft 83 sleeve 84 pin 85 cover 86 limit switch 87 balance bar spring 88 Adjustment bolt 89 Screw 91 Locking hole 92 Limit switch bracket 93 Return from 94 94 Long hole 95 Bolt 96 Block 97 Bolt 631 Flange piece 811 Base portion 861 Lead piece

Front page continuation (72) Inventor Hiroshi Furukawa 2-1-19 Hinode, Kawasaki-ku, Kawasaki-shi, Kanagawa Strapack Co., Ltd. Kawasaki Plant

Claims (4)

[Scope of utility model registration request] 1. A pool box having a band inlet through which a band passes and a band outlet for supplying to a band guide arch attached to the main body of the packing machine, and provided with two plate members facing each other in parallel at a predetermined interval. In a packing machine provided with a pair of pool rollers for supplying a band into the pool box in the vicinity of the band entrance, and provided with a rotation driving means for rotating the pool roller, the opening at the lower edge of the second plate material of the pool box A balance bar is slidably supported on the inside and outside of the facing pool box, and a limit switch is provided at the rear of the direction in which the balance bar slides to the outside of the pool box on the swing path of the balance bar. The balance bar is provided so as to be constantly pressed through a balance bar spring whose urging force can be adjusted. Band pool amount detecting device in a packaging machine, characterized in that provided to stop the rotation of the pool roller detection signal for detecting that it has separated from the switch. 2. The band pool amount detecting device in a packing machine according to claim 1, further comprising a stopper for restricting a swinging distance in a direction of pressing a limit switch of the balance bar. 3. An engaging hole serving as the stopper is provided in one plate member of the pool box, a pin inserted into the engaging hole is projectingly provided on the balance bar, and the pin is projected to a back surface of the one plate member. 2. The band pool amount detecting device in a packing machine according to claim 1, wherein the limit switch is provided at a rear side in a direction in which the balance bar is slid to the outside of the pool box on a swing locus of the pin. 4. The swing shaft of the balance bar is provided below the pool box on the opposite side to the band entrance, and the tip of the balance bar is located below the band entrance side. Band pool amount detector in packing machine.