JP3568169B2 - Band exchange device in binding machine - Google Patents

Description

[0001]
[Industrial applications]
According to the present invention, in a binding machine having a plurality of band reels on a side portion, when there is no band to be supplied from one band reel to the binding machine, the band of the other band reel is automatically replaced and supplied. The present invention relates to an automatic band changing device.
[0002]
[Prior art]
As a band exchange device in a binding machine having two or more band reels, there are two types depending on which side the short band remaining in the chamber is discharged. One of them is a system in which the remaining short band is discharged from the arch side along the supply direction of the band (for example, JP-A-1-213107), and the other is a direction opposite to the supply direction. (Japanese Utility Model Laid-Open No. 1-76402).
[0003]
[Problems to be solved by the invention]
Of the two methods, the former method requires a shooter and a feeding means for discharging the short tape remaining in the chamber, in addition to the usual arch and feeding means, which complicates the apparatus. In addition, there is a problem that if the end of the band is bent, the band will be jammed in the shooter.
[0004]
On the other hand, the latter method does not have the same problems as the former method, but has a problem that the apparatus is increased in size and the cost is increased because the band feeding mechanism is provided independently for each of the two band reels. Therefore, a band switching apparatus disclosed in Japanese Patent Application Laid-Open No. 5-51006 has been proposed as the latter system which solves such a problem.
[0005]
However, in this band exchange device, the upper and lower band passages are independently configured, and the band switching means is also provided with two rollers, and the band is switched by operating each of the rollers. Therefore, there is a problem that the number of parts increases and the device becomes complicated and large. Further, since this band exchange device is intended for a binding machine provided with two band reels in the vertical direction, it cannot be applied to a binding machine having two band reels at almost the same height.
[0006]
SUMMARY OF THE INVENTION The present invention has been made in view of these problems. In a system for discharging a band on a band reel side, a band passage is integrally formed, and a switching unit is simplified to reduce the size and simplification of the apparatus. Another object of the present invention is to provide a band changing device in a binding machine capable of supplying a band to an arbitrary band passage regardless of the positions of two band reels.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a binding machine having a plurality of band reels on a side, the banding machine having two band passages, and the two bands on a side having the plurality of band reels. Band guide means provided on the binding machine main body so that an entrance portion of the passage is located, and a roller provided between the two band passages at a side end of the band guide means located inside the binding machine main body And a band feeding means having two driven rollers respectively provided at upper and lower portions of the two band paths which come into contact with and separate from the rollers, and the two band paths having one side via the band feeding means. And a confluent means comprising a single outlet path, the other side of which is composed of two continuous passages, and the other side of which is formed by a single outlet path where the two converged paths are merged. Then Switching means for selectively closing only one of the two paths by swinging, and cylinders provided respectively corresponding to the two driven rollers, the two driven rollers Is operated so as to selectively contact with and separate from the roller, and the cylinder of the switching means is connected to a band path provided with a driven roller in which the switching means moves in a direction away from the driving roller. And a solenoid-operated switching valve that operates in a direction to close the valve.
[0008]
The present invention also relates to a binding machine having a plurality of band reels on a side portion, the binding device having two band passages, and an entrance portion of the two band passages on a side portion having the plurality of band reels. And a roller provided between the two band passages at a side end of the band guide unit located in the body of the binding machine, and A band feeding means having two driven rollers respectively provided at upper and lower portions of the two band passages which come into contact with and separate from the rollers, and one side is respectively connected to the two band passages via the band feeding means. A merging means comprising two passages, the other side comprising a single outlet passage where the two passages merge, and a passage formed between the two passages of the merging means to form the passage; To move Therefore, switching means for selectively closing only one of the two passages, and a cylinder provided for each of the two driven rollers, the two driven rollers with respect to the rollers And selectively actuates the cylinder of the switching means in a direction in which the switching means closes a path continuous with a band path provided with a driven roller moving in a direction away from the driving roller. An electromagnetic switching valve for causing the band guide means to be integrated with a fixing member fixed to the binding machine main body side and a guide member attached to upper and lower portions of the fixing member so as to form the two band passages. It is structured.
[0009]
Further, according to the present invention, the swing of the switching means is made faster than the contact and separation of the driven roller with respect to the roller, and the plurality of band reels are mounted at substantially the same height position on the side of the binding machine. There is a configuration.
[0010]
[Action]
According to the band exchanging device in the binding machine having the above-described configuration, the band exchanging is automatically performed when the band currently in use is exhausted by merely inserting the tip of the new band through the passage of the band guide means and setting the band. Is performed, and the subsequent binding operation is continuously performed by the set new band.
[0011]
Specifically, when the remaining amount of the band currently supplied to the binding machine via one of the band passages is such that the binding cannot be performed, the driving roller of the band feeding means performs reverse rotation to remove the remaining tape. Discharge to the outside. Thereafter, the driven roller and the driving roller on the other band passage side are brought into contact with each other, and the switching member of the switching unit is swung to close one passage side of the merging unit and open the other passage side. Next, a new band set in the other path is supplied to the binding machine by rotating the driving roller.
[0012]
【Example】
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic diagram showing the overall configuration of an embodiment of a binding machine using the band exchange device of the present invention. In FIG. 1, reference numeral 1 denotes an apparatus main body of a binding machine, on which an arch frame 2 is provided at an upper portion. Inside the arch frame 2, a guide frame 3 for winding a band 50 around a binding object (not shown) placed on the apparatus main body 1 of the binding machine is provided.
[0013]
Reference numerals 4a and 4b denote feed rollers for feeding a band 50 in the chamber 10 to be described later into the guide frame 3. The band 50 is fed only when the pressing roller 4b is pressed against the driving roller 4a. 5a and 5b are return rollers for pulling back the band 50 in the guide frame 3, and pull back the band 50 only when the pressing roller 5b is pressed against the driving roller 5a. Reference numerals 6a and 6b denote tension rollers for tightening the band 50 wound around the object to be bound (not shown). The tension roller tightens the band 50 only when the pressing roller 6b is pressed against the driving roller 6a.
[0014]
Reference numeral 7 denotes a sealing means, which comprises a sensor 7a and an anvil 7b, and an unillustrated adhesive portion and a cut portion, which detects the band tip when tightening, holds the band, and bonds and cuts the band after binding.
[0015]
Reference numeral 10 denotes a chamber for storing a predetermined amount of the band 50, which is built in the apparatus main body 1. The chamber 10 has a thin box shape having a thickness slightly larger than the width of the band 50, and a pressure receiving plate which is constantly urged upward at the bottom thereof and which is lowered when the band amount in the chamber 10 increases. 11 is provided. A sensor 12 that operates according to the position of the pressure receiving plate 11 is provided below the pressure receiving plate 11.
[0016]
An outlet hole 13 for sending out the band 50 to the feed rollers 4a and 4b is provided in an upper portion of the chamber 10, and a part of a band changing device 30 described later is provided on a side portion. Further, as shown in FIGS. 1 and 2, a chamber gate 14 is provided in the chamber 10 so as to be able to advance and retreat in the chamber 10. The chamber gate 14 is used for band-passing. One end of the chamber gate 14 is located at the outlet of the band changing device 30, and the other end is connected to the outlet hole 13 of the chamber 10.
[0017]
Reference numerals 21a and 21b denote band reels around which the bands 50a and 50b are wound. The band reels 21a and 21b are attached to one side of the binding machine main body 1 by a support member (not shown). These band reels 21a and 21b are both mounted at substantially the same height on the side of the arch frame 3.
[0018]
Reference numerals 22a, 22b and 23a, 23b denote guide rollers for pulling out bands from the corresponding band reels 21a, 21b, respectively. Reference numeral 24 denotes a band direction changing guide roller which changes the direction of the bands 50a, 50b from the side-by-side band reels 21a, 21b by 90 degrees, and is disposed at an entrance of a band changing device 30 described later. It approaches to 31a, 31b side. Therefore, the band direction changing guide rollers 24 (24) are arranged side by side as two pairs so as to wind the two bands 50a and 50b together. Sensors 25a and 25b are provided near the guide rollers 22a and 22b, and detect the presence or absence of the bands 50a and 50b passing through the guide rollers 22a and 22b.
[0019]
The band changing device 30 includes a guide roller 31a, 31b disposed on the entrance side, a band guide means 32 for sending the band 50 to the chamber 10, a band feeding means 33 having a driving roller 331 and a driven roller 332, and a joining means. 34, and switching means 35.
[0020]
Next, an embodiment of the band switching device 30 having such a configuration will be described. FIG. 3 is an overall view showing a first embodiment of the band switching device 30.
[0021]
A part of the band guide means 32 is located in the chamber 10, and the other part protrudes from the chamber 10. The band guide means forms a prismatic fixing member 321 fixed to the wall of the chamber 10, and upper and lower band passages 322 a and 322 b through which the band 50 can pass at upper and lower portions of the fixing member 321. It comprises upper and lower guide members 323a, 323b attached.
[0022]
Here, the fixing member 321 is a common member for forming the upper and lower band passages 322a and 322b, and the upper and lower guide members 323a and 323b are also fixed to the fixing member 321. Therefore, the upper and lower band passages 322a and 322b are integrally formed with a minimum number of members.
[0023]
The band feeding means 33 is disposed adjacent to an end of the band guide means 32 on the side located inside the chamber 10. The driving roller 331 is located between the upper and lower band passages 322a and 322b, and the driven rollers 332a and 332b are disposed so as to sandwich the driving roller 331 from above and below.
[0024]
In this case, the rotating shafts 333a and 333b of the driven rollers 332a and 332b are supported by eccentric bushes 334a and 334b, and the eccentric bushes 334a and 334b are connected to cylinders 336a and 336b via arms 335a and 335b. Therefore, when the cylinders 336a and 336b operate and the eccentric bushes 334a and 334b rotate, the driven rollers 332a and 332b come into contact with or separate from the drive roller 331. The contact of the driven rollers 332a and 332b with the drive roller 331 is selectively performed, and the contacted driven roller sends the band 50 together with the drive roller 331 in the rotation direction of the drive roller 331.
[0025]
The joining means 34 is arranged continuously with the band guide means 32 via the band feeding means 33. The merging means 34 includes a merging guide member 341 having a tapered space portion, and a switching member 351 having a similar shape slightly smaller than the tapered space portion and arranged in the space portion. As a result, the inlet side of the merging means has an upper passage 342a and a lower passage 342b which respectively form passages integrally with the band passages 322a and 322b of the band guide means 32, and the outlet side has the upper passage 342a and the lower passage 342b. One exit path 343 where 342b merges.
[0026]
The switching means 35 includes the switching member 351 disposed in the space of the merging guide member 341, a fixing member 352 fixed to the wall of the chamber 10 and supporting the switching member 351 via a shaft 353 so as to be swingable. And a cylinder 354 connected to the tip of the switching member 351 and swinging the switching member 351 up and down. Therefore, when the switching member 351 swings and comes into contact with the inner wall of the joining guide member 341, the passage formed on the contacted side is closed, and the band on the opposite side can pass through the band 50. It becomes a state.
[0027]
Next, the operation of the band switching device of the first embodiment having such a configuration will be described. In FIG. 3, the piston rod of the upper cylinder 336a of the band feeding means 33 is retracted, the upper driven roller 332a is in contact with the drive roller 331, the piston rod of the lower cylinder 336b is projected, and the lower driven roller 332b is driven. The state is apart from the roller 331. The switching member 351 is pulled by the cylinder 354 to close the lower passage 342b.
[0028]
Under such a state, the band 50a from the band reel 21a passes through the upper band passage 322a of the band guide means 32, and the driving roller 331 of the band feeding means 33 and the upper driven roller 332a cause the joining of the joining means 34. The water is sent to the upper passage 342a, and is sent into the chamber 10 through the outlet passage 343. At this time, the chamber gate 14 has been retracted from the inside of the chamber 10.
[0029]
Here, rotation (counterclockwise rotation in FIG. 3) of the drive roller 331 for supplying the band 50a from the band reel 21a into the draw-out chamber 10 is ON / OFF controlled by a signal from the sensor 12 of the chamber 10. An appropriate amount of band 50a is always stored in the chamber.
[0030]
On the other hand, the band 50b drawn out from the band reel 21b is set in the lower band passage 322b of the band guide means 32, but the driven roller 332b of the band feeding means 33 is not in contact with the drive roller 331, and Since the lower passage 342b of the merging unit is also closed by the switching member 351, the band 50b is prevented from entering the chamber 10.
[0031]
The binding operation is repeated in such a state, and when the band 50a on the band reel 21a is used up, the sensor 25a detects this. Based on the signal from the sensor 25a, the driving roller 331 stops rotating (counterclockwise). Thereafter, by repeating the binding operation with the band stored in the chamber 10, the remaining amount of the band in the chamber 10 becomes small, so that the tip of the band does not hit the sensor 7 a of the sealing means 7 and the sensor 12 in the chamber 10 Detects that the band amount is insufficient, the drive roller 331 is reversely rotated (rotated clockwise) for a predetermined time, and the short remaining tape in the chamber 10 is discharged from the band guide means 32 to the outside of the binding machine (FIG. 1). Two-dot chain line).
[0032]
After a certain period of time, the upper cylinder 336a and the lower cylinder 336b operate in opposite directions, so that the upper driven roller 332a separates from the driving roller 331 and the lower driven roller 332b comes into contact with the driving roller 331. At the same time, the cylinder 354 is actuated to push up the switching member of the switching means 35 to close the upper passage 342a of the merging means 34 and make the lower passage 342b capable of passing a band. Furthermore, the driving roller 331 is rotated clockwise at the same time as or slightly after these operations.
[0033]
Thus, the band 50b from the band reel 21b passes through the lower band passage 322b of the band guide means 32, and is driven by the driving roller 331 and the lower driven roller 332b into the chamber 10 via the lower passage 342b and the outlet path 343 of the joining means. Sent to At this time, the chamber gate 14 is set in the chamber 10. Therefore, the band 50b is guided by the chamber gate 14 and is sent to the feed rollers 4a and 4b, so that the band 50b is in a operable state. Thereafter, the chamber gate 14 retreats.
[0034]
The chamber gate 14 is retracted, the band 50b is supplied from the band reel 21b, and the band reel 21a is replaced with a new one while the band is supplied to the chamber. Set in the same manner as 50b. As a result, it is possible to automatically set a band when the band is exchanged.
[0035]
When the band is first set, the band reels 21a and 21b are provided at substantially the same height in the binding machine of the present invention, so that any bands 50a and 50b are set in any band passages 322a and 322b. There is no restriction on the correspondence between the band reels 322a and 322b and the band passages 322a and 322b. Therefore, band setting in the initial state can be easily performed.
[0036]
FIG. 5 is an overall view of a second embodiment in which the band switching device of the first embodiment is improved. In this embodiment, the upper and lower cylinders 336a and 336b for operating the upper and lower driven rollers 332a and 332b of the band feeding means 33 and the cylinder 354 of the switching means 35 can be switched by the same electromagnetic switching valve 36. . This simplifies the configuration and control.
[0037]
Further, by controlling the upper and lower cylinders 336a and 336b of the band feeding means 33 through the speed regulating valves 37a and 37b, the cylinder 354 of the switching means 35 can be operated faster than the upper and lower cylinders 336a and 336b. ing. In this way, the band feeding by the band feeding means 33 is performed after the switching of the passage of the switching means 35 is completely completed, so that the band clogging in the switching means 35 is prevented.
[0038]
FIG. 6 is an overall view of a third embodiment of the band switching device. In this embodiment, the driven roller 332 in the band feeding means 33 is disposed between the upper and lower band passages 322a and 322b, and the driving rollers 331a and 331b are disposed on the upper and lower portions. The driven roller 332 is oscillated by the cylinder 39 to selectively contact the drive rollers 331a and 331b. As a result, the number of cylinders that swing the driven roller is reduced, and the size of the apparatus is reduced. In the third embodiment, the swing of the driven roller can be performed by using an eccentric bush as in the case of the driven roller of the first embodiment.
[0039]
The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the gist.
[0040]
【The invention's effect】
As described above, according to the band exchange device in the binding machine of the present invention, the switching of the passage in the switching unit is performed only by the swinging of the switching member forming the passage of the joining unit. The size of the device can be reduced. In addition, since the band guide means also has a configuration in which the two passages are integrally formed, the apparatus can be further simplified and downsized. Further, a band from an arbitrary band reel can be set in an arbitrary passage, so that workability can be improved.
[Brief description of the drawings]
FIG. 1 is an overall schematic diagram of a binding machine using a band exchange device of the present invention.
FIG. 2 is an enlarged view cut along the line AA of FIG. 1;
FIG. 3 is a front view showing a first embodiment of the band switching device of the present invention.
FIG. 4 is a sectional view taken along line BB of FIG. 3;
FIG. 5 is a front view showing a second embodiment of the band switching device of the present invention.
FIG. 6 is a front view showing a third embodiment of the band switching device of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Apparatus main body 2 Arch frame 3 Guide frame 4a, 4b Feed roller 5a, 5b Return roller 6a, 6b Tension roller 7 Sealing means 10 Chamber 11 Pressure receiving plate 12 Sensor 14 Camber gate 21a, 21b Band reel 22a, 22b, 23a, 23b Guide Roller 24 Direction changing guide roller 30 Band changing device 31a, 31b Guide roller 32 Band guide means 321 Fixed member 322a Upper band passage 322b Lower band passage 323a Upper guide member 323b Lower guide member 33 Band feed means 331 Drive roller 332a Upper driven roller 332b Lower driven roller 334a Upper eccentric bush 334b Lower eccentric bush 335a Upper arm 335b Lower arm 336a Upper cylinder 336b Lower cylinder 34 Combining means 3 1 merging guide members 342a upper passage 342b lower passage 343 outlet passage 35 switching means 351 switching member 354 cylinder

Claims (4)

In a binding machine with a plurality of band reels on the side,
Band guide means provided in the binding machine body such that it has two band passages, and an entrance portion of the two band passages is located on a side portion provided with the plurality of band reels,
A roller provided between the two band passages at a side end of the band guide means located in the binding machine main body, and provided at upper and lower portions of the two band passages which come into contact with and separate from the rollers. Band feeding means having two driven rollers,
Combining means consisting of two passages, one side of which is continuous with the two band passages via the band feeding means, and the other side comprising one outlet path where the two passages merge,
A switching unit that is located between the two passages of the merging unit and forms the passage, and that swings to selectively close only one of the two passages;
A cylinder provided corresponding to each of the two driven rollers is operated so that the two driven rollers selectively contact and separate from the rollers, and the cylinder of the switching unit is switched by the switching unit. An electromagnetic switching valve that operates in a direction to close a passage that is continuous with a band passage provided with a driven roller that moves in a direction away from the drive roller,
A band exchange device in a binding machine, comprising: In a binding machine with a plurality of band reels on the side,
Band guide means provided in the binding machine body such that it has two band passages, and an entrance portion of the two band passages is located on a side portion provided with the plurality of band reels,
A roller provided between the two band passages at a side end of the band guide means located in the binding machine main body, and provided at upper and lower portions of the two band passages which come into contact with and separate from the rollers. Band feeding means having two driven rollers,
Combining means consisting of two passages, one side of which is continuous with the two band passages via the band feeding means, and the other side comprising one outlet path where the two passages merge,
A switching unit that is located between the two passages of the merging unit and forms the passage, and that swings to selectively close only one of the two passages;
A cylinder provided corresponding to each of the two driven rollers is operated so that the two driven rollers selectively contact and separate from the rollers, and the cylinder of the switching unit is switched by the switching unit. An electromagnetic switching valve that operates in a direction that closes a continuous passage with a band passage provided with a driven roller that moves in a direction away from the drive roller,
The band guide means is integrally formed by a fixing member fixed to the binding machine body side and a guide member attached to upper and lower portions of the fixing member so as to form the two band passages. Band changing device in binding machine. 3. The band changing device in the binding machine according to claim 1, wherein the swing of the switching unit is faster than the contact and separation of the driven roller with the roller. 4. A band changing device in a binding machine according to claim 1, wherein said plurality of band reels are mounted at substantially the same height on the side of the binding machine.

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