JP3090248U - Band clogging prevention device for band type packing machine - Google Patents

Abstract

(57) Abstract: An object of the present invention is to provide a band clogging prevention device for a band-type packing machine having a simple structure capable of preventing band clogging with high sensitivity. In a semi-automatic band type packing machine, a band guide (42) that guides a band and swings in a radial direction by waving of the band in a discharge side area of a driving roller.
And a sensor 49 for detecting the swing of the band guide 42 and sending a stop signal to the drive system.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an apparatus for preventing band clogging in a band-type packing machine in which a packing band is wound around a package, tightened, cut, and welded.

[0002]

[Prior art]

 As a means of packing goods tightly, a band is attached to the object, the band is tightened, the overlapping part at both ends of the band is heated and fused, and the band is cut near the fused part. Machine is widely used. In this type of packing machine, it is indispensable to send the band drawn from the band reel forward by a reversible rotatable transport roller, and to wind it back first after winding it around the packing material first and then tighten it. A band guide is arranged on the band movement trajectory to guide the band at the time of feeding and pulling back. However, in the past, when a load was applied to the tip of the band for some reason, the band often clogged at the band guide portion, making it impossible to feed or pull back. In such a case, the guide must be disassembled one by one in order to remove the clogging, which causes a problem that the work efficiency is reduced.

[0003]

[Problems to be solved by the invention]

 The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide a band clogging prevention device for a band-type packing machine having a simple structure capable of preventing band clogging with high sensitivity. To provide.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention relates to a semi-automatic band type packing machine that guides a band through a space between a rocker roller and a driving roller, sends and retracts the band, cuts and welds and packs the band. In the discharge side area of the roller, a band guide that can guide the band and swing in the radial direction by waving of the band and a sensor that detects the swing of the band guide and sends a stop signal to the drive system are provided. It is a feature.

[0005] In a preferred example, the band guide has one end supported by a fulcrum member so as to be tiltable, and a microswitch serving as a sensor is located near the band guide. An operation piece biased to the retreat side is provided, and the operation piece is engaged with a claw provided at a position displaced from a fulcrum portion of the band guide, and when the band guide swings, the claw is provided through the claw. The operation piece is moved and the micro switch is activated.

[0006]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. 1 to 6 show an embodiment of a band clogging prevention device for a band-type packing machine according to the present invention. In FIG. 1, reference numeral A denotes a housing, which is supported at a predetermined height by a leg B. C is a band reel held in place such as a lower part of the housing A. A band D is pulled out from the band reel C and inserted into the housing A through the insertion port a.

[0007] E is a table plate that covers the top surface of the housing A, is provided with a slit e in the width direction, arranges an object to be packaged so as to intersect with the slit e, and places a band through a take-out opening provided in the slit e. D is pulled out, wrapped around the object to be packaged, and inserted into the front end of the band through the insertion opening F, whereby tightening, welding, cutting, and band feeding are performed.

As shown in FIG. 2, a mechanism for performing a series of steps of tightening, welding, cutting, and band feeding is built in the housing A. Reference numeral 1 denotes a drive motor, which is fixed to a portion of the housing A close to the insertion port a with a relationship orthogonal to the band orbital direction, and a pulley 8 is fixed to an output shaft of the drive motor 1. .

Reference numeral 2 denotes a drive roller shaft that is traversed by a bearing block at a position remote from the drive motor 1, and a drive roller 9 is fixed to one shaft end, while a pulley 10 is fixed to the other shaft end. Have been.

Reference numeral 3 denotes a worm shaft which is supported obliquely below the drive roller shaft 2 in parallel with the drive roller shaft 2. An electromagnetic brake is mounted on one shaft end, and a pulley 12 is mounted on the other shaft end. Is fixed. A V-belt 13 is stretched between the drive motor 1 and each of the pulleys 8, 10 and 12 of the drive roller shaft 2 and the worm shaft 3, so that the driving force of the drive motor 1 is transmitted. There.

Reference numeral 4 denotes a cam shaft supported by a bearing block 14 so as to be orthogonal to the worm shaft 3, and has a worm wheel 15 meshed with the worm shaft 3 at one end as shown in FIG. The cams 16 are attached at regular intervals, and the lower end bearings of the grip bars 17a, 17b, 17c slidably inserted into the bearing block 14 respectively come into contact with the cams 16 and are moved up and down at a predetermined timing. .

Reference numeral 5 denotes a band end processing unit located directly below the table plate on an extension of the grip bars 17a, 17b, and 17c. A supported slide table 20, a front gripper 22 fixed to an upstream grip bar 17a immediately below the slide table 20, a press head 23 fixed to a central grip bar 17b, and a downstream grip bar 17c. A rear gripper 24 is provided. In this example, the rear gripper 24 is provided with a self-holding mechanism 25 for the pulled back band.

As shown in FIG. 2, a micro switch 29 for detecting the leading end of the band is disposed on the bearing block downstream of the rear gripper 24, and a switch lever is provided below the slide table 20 and the guide 21. Switch pins are arranged, and the micromotor 29 is turned on via these to start the drive motor 1.

In the area of the drive roller 9, a rocker roller 33 which constitutes a transport roller for feeding and retracting the band D in cooperation therewith is provided. That is, a rocker shaft 32 supported by the bearing block 14 is provided diagonally below the drive roller shaft 2, and a rocker roller 33 is attached to the rocker shaft 32.

A band guide having a band clogging prevention device 6 which is a feature of the present invention is provided in a band moving orbit region from the rocker roller 33 to the slide table 20.

The band guide has a tunnel-shaped discharge guide 40 whose tip reaches the vicinity of the guide plate 21 and whose rear side is supported by a fulcrum pin 41, and covers approximately half the circumference of the drive roller 9 upstream of the discharge guide 40. Guide (drive roller section guide) 42 having a laterally L-shaped cross section, and a rocker roller having a front end positioned so as to overlap with the intermediate guide. An introduction guide 44 having a U-shaped cross section and extending downward to cover substantially half the circumference of 33. A spring 45 is provided in the middle of the introduction guide 44 to contact the surface of the band and prevent the band from returning.

A tightening detection micro-switch 46 is disposed near the lower surface of the discharge guide 40. The tightening detection micro-switch 46 is provided by the tension when the band D is wound around the package. It is turned on by swinging, and controls to proceed to the next process.

The intermediate guide 42 is a band guide which is a feature of the present invention, and is located in the discharge side area of the driving roller, and has one side surface facing the open space, and as shown in FIGS. A claw 420 bent in the feed direction is provided above a pivot point with the pin 43. On the other hand, a bracket 47 is fixed to the bearing block 14 with mounting bolts 48, and a clogging detection sensor 49 for emergency-stopping the drive motor 1 when there is a danger of band clogging occurring. It is mounted and connected to the electric circuit of the drive motor 1 via the controller 50. The fulcrum pin 43 is fixed to the bearing block 14 and has a stopper 430 at the tip.

As the clogging detection sensor 49, for example, a microswitch is used as shown in FIG. 3, and a hinge lever 491 of the microswitch is horizontally mounted on a long hole 470 provided in the bracket 47 so as to be movable horizontally. It is in contact with pin 51. 4 and 5, the free end side is connected to the base end side of the operation piece 52 engaged with the claw 420 of the intermediate guide 42, and the pin 51 is connected to the bracket 47. It is urged backward by a spring 53 that is erected.

[0020]

Operation of the embodiment

 To explain the operation of the present invention, the band D is pulled out from the band reel C, inserted into the insertion port a of the housing A, guided through the introduction guide 44 to the rocker roller 33 in the clockwise direction, and connected to the drive roller 9. Is guided by the intermediate guide 42 so as to pass in the counterclockwise direction on the outer periphery of the drive roller 9 through the gap between the rollers, and is drawn out from the outlet through the discharge guide 40 onto the table plate E.

In packing, an object to be wrapped is arranged so as to intersect with the slit e, and the band D is wound around the object to be wrapped. As a result, the switch lever 30 and the switch pin 31 are pressed by the tip of the band, so that the tip detection microswitch 29 is turned on, and the signal causes the drive motor 1 to rotate (forward). This rotation is transmitted to the roller shaft pulley 10 and the worm shaft pulley 12 via the V-belt 13, the worm of the worm shaft 3 rotates the cam shaft 4, and the front gripper 22 rises to hold the tip of the band.

Next, when the timing cam 18 attached to the camshaft 4 turns on a position confirmation microswitch (not shown), the rotation of the camshaft 4 stops, and at the same time, a solenoid (not shown) turns on. At this time, the worm shaft electromagnetic clutch (not shown) is turned off and the worm shaft electromagnetic brake is turned on.

When the rocker roller 33 is pressed against the drive roller 9, the band D is moved backward by the rotation of the drive roller 9 while being sandwiched between the rocker roller 33 and the drive roller 9, and starts tightening.

When the band D is returned and wrapped around the article to be packed, the tension causes the discharge guide 40 to swing about the fulcrum pin 41, and the tightening detection microswitch 46 is turned on. When the tightening is performed for the set time, the drive motor 1 temporarily stops rotating, the rocker roller 33 is separated from the drive roller 9, and the band is not tightened.

Next, when the rocker roller 33 is separated from the drive roller 9, the tensioned band D tries to return. At this time, the self-holding mechanism 25 operates, and the clamp piece hits the lower surface of the band D and moves backward. , And the band D is engaged with the lower surface of the slide table 20. Thus, the band D is held so as not to move in the downstream direction.

The subsequent steps are the same as in the prior art, and the camshaft 4 starts rotating simultaneously with the rotation of the drive motor 1, whereby a heater attached to a heater arm (not shown) is inserted between the bands. Is done. At the same time, the separator retracts backward. When the cam shaft 4 is further rotated, the press bar 23 is raised by the press bar 17, and the band is cut and pressed while the heater is sandwiched between the bands.

When the camshaft 4 further rotates, the press head 23 descends, and the heater retreats. When the camshaft 4 further rotates, the press head 23 rises again, and the melted surfaces of the band are aligned and pressure-bonded. I do. Then, when the camshaft 4 further rotates, the front gripper 22, the press head 23 and the rear gripper 24 descend, and the slide table 20 retreats backward, and then advances. When the timing cam 18 attached to the camshaft 4 turns on the position confirmation microswitch (not shown), the drive motor 1 is stopped, the worm shaft electromagnetic clutch is turned off, and the worm shaft electromagnetic brake is turned on.

Thereafter, when the drive motor 1 rotates (reversely rotates), the band D is pinched and moved by the rocker roller 33 and the drive roller 9, and the band having the length set by the volume on the operation panel is sent out. Stops, and one cycle of packing ends.

When a load is applied to the front end of the band during the band feeding or tightening as described above, the band D becomes wavy as shown in FIG. 6, whereby the intermediate guide 42 moves in the radial direction. Pressed. Since the upper portion of the intermediate guide 42 is supported by the fulcrum pins 43, the intermediate guide 42 swings so that the entire band D rises due to the waving of the band D.

As a result, the operation piece 52 is pulled forward by the claw portion 420, and the pin 51 connected to the operation piece 52 is moved forward in the elongated hole 470 against the elasticity of the spring 53. A micro switch 46 serving as a clogging detection sensor operates. Therefore, the drive circuit of the drive motor 1 is opened by a signal from the controller 50, and the drive motor 1 is stopped in an emergency. Therefore, band clogging is reliably prevented.

Even if the band D is clogged, the intermediate guide 42 can swing so as to open via the fulcrum pin 43, and the side surface of the intermediate guide 42 faces the open space, and Since it can be pulled out and disassembled along the fulcrum pin 43, it can be easily handled.

[0032]

[Effect of the invention]

 According to the first aspect of the present invention described above, in the semi-automatic band type packing machine for guiding the band through the space between the rocker roller and the drive roller, sending and pulling back the band, cutting and welding, and packing. A band guide 42, which guides the band and can swing in the radial direction by waving the band, and a sensor 4 which detects the swing of the band guide 42 and sends a stop signal to the drive system in the discharge side area of the drive roller. Since the band 9 is provided, an excellent effect is obtained in that the band clogging that frequently occurs on the discharge side of the band conveying roller can be automatically and reliably prevented with a simple structure.

According to the second aspect, the band guide 42 is supported so that the end thereof can be tilted by the fulcrum member 43, while the microswitch 49 is located near the band guide 42 as a sensor. An operation piece 52 biased backward by a spring 53 is provided. The operation piece 52 is engaged with a claw 420 provided at a position displaced from a fulcrum portion of the band guide 42, and the band guide 42 swings. At this time, since the operation piece 52 is moved via the claw portion 420 and the micro switch 49 is operated, the clogging can be detected with high sensitivity using the swing of the entire band guide 42. The effect is obtained. Further, even when the band is jammed, the band guide 42 can be tilted and opened by the fulcrum member 43, or the band guide 42 can be pulled out along the fulcrum member 43, so that an excellent effect that it can be easily dealt with is obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an appearance of a band-type packing machine according to the present invention.

FIG. 2 is a side view of the band-type packing machine having the band clogging prevention device according to the present invention.

FIG. 3 is a side view showing the band blocking prevention device according to the present invention in a normal state.

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3;

FIG. 5 is a sectional view taken along line VV in FIG. 4;

FIG. 6 is a side view showing a state when the band blocking prevention device according to the present invention is operated.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 drive motor 6 band jam prevention device 9 drive roller 33 rocker roller 42 band guide 43 fulcrum pin 49 sensor 52 operating piece 53 spring 420 claw

Claims (2)

[Utility model registration claims] 1. A semi-automatic band type packing machine for guiding a band through a space between a rocker roller and a driving roller, feeding and retracting the band, cutting and welding, and packing the band. , A band guide 42 for guiding the band and swinging in the radial direction by waving of the band, and a sensor 49 for detecting the swing of the band guide 42 and sending a stop signal to the drive system. Band clogging prevention device for band type packing machine. 2. A band guide 42 is supported at its end by a fulcrum member 43 so as to be tiltable, while a micro switch 49 is located near the band guide 42 as a sensor. Is provided at the position where the operation piece 52 is displaced from the fulcrum of the band guide 42.
The band in the band-type packing machine according to claim 1, wherein when the band guide 42 swings, the operation piece 52 is moved via the claw portion 420 and the micro switch 49 operates. Anti-clogging device.