JPH09295607A - Automatically connecting apparatus for band - Google Patents

Abstract

PROBLEM TO BE SOLVED: To connect bands reliably and accurately while preventing non-welded parts of the bands from being formed at their connected parts by providing a means for positioning a top end of the band being in a standby position within a heater width and a terminal end controlling unit for stopping a terminal end of the band being in use within the heater width as well. SOLUTION: A band wound around a first band reel is in a standby position in such a state that a top end thereof is brought into contact with an upper side stopper 52a of a path change-over lever 52. On the other hand, a band being in use at present is sent to a band chamber from a second band reel through a path 53 of the path change-over lever 52 and a gap between a pair of guide rollers 66. When the band wound around the second band reel is used up and its terminal end passes through a band terminal end detector, a driving motor is controlled to stop its operation, and the terminal end of the band is stopped within a pressurizing unit 43. Then, the lower face of the top end of the band wound around the first band reel and the upper face of the terminal end of the band being in use are simultaneously pressed against each other under heating by a pressurizing head of the pressurizing unit 43, whereby the top end and the terminal end of both the bands are connected to each other by welding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a band feeder for an automatic packing machine, and more particularly to an improvement of automatic connecting means between the end of the band in use and the start of the band of the spare reel.

[0002]

2. Description of the Related Art Conventionally, it has been known, for example, in Japanese Utility Model Laid-Open No. 64-14603, to automatically connect the end and start ends of the bands of two band reels in a continuously operating binding machine. An outline of such a conventionally known band connecting device for an automatic packing machine will be described with reference to FIGS. A band is fed to a band storage chamber 02 of an automatic packing machine 01 having an arch type band guide by a band feeding device 04 including an entrance guide 03 and a pair of rollers. First and second band reels 05 and 06 are rotatably supported by brackets at appropriate places on the main frame of the automatic packing machine 01, and the bands 05a and 0 are attached to the respective reels.
6a is wrapped around.

Reference numeral 07 indicates a band connecting device, which is provided upstream of the band feeding device 04. Band connection device 07
Is provided with a moving crimping member 09 facing the fixed crimping member 08 and reciprocating by a cylinder 10 or the like. A band stopper 11 is provided near the fixed crimping member and the moving crimping member.
12 are provided respectively. Reference numerals 13 and 14 denote band end detecting devices, which are rollers 1 upstream of the band connecting device 07.
5 and 16 and rollers 17 and 18, each of which is composed of a photoelectric switch, a limit switch or the like for detecting the ends of the bands 05a and 06a.

Then, the band of the first band reel 05 being used is completely consumed during the packing, and the band 05
a When the terminating portion passes through the end detecting device 13, a signal from the end detecting device 13 causes the band feeding device 04
Is stopped and the heating plate projects between the bands 05a and 06a to heat the both bands. After heating for a predetermined time, the heating plate is retracted from between the bands 05a and 06a, the cylinder 10 is operated, and the moving crimp member 09 is crimped onto the fixed crimp material 08 to connect the bands 05a and 06a. After that, the cylinder 10 is shortened and the moving crimp member 09 is returned to its original position, and the second band reel 06 is operated by the operation of the band feeding device 04.
Band 06a will continue to be used.

After the used first band reel 05 is replaced with a new one while the band of the second band reel 06 is in use, the band is passed through the guide rollers 15, 16 and the band connecting device 07. , The tip of the new band is locked to the band stopper 12. When the use of the band 06a is completed, the band 06a and the new band are connected in the same manner, and by connecting them in the same manner, the automatic packing machine 01 can be continuously operated.

[0006]

In the band connecting means in this type of known automatic packing device, the following problems may occur. That is, first,
The band sent to the storage chamber by the band sending device 04 is considerably high speed, and the end of the band is detected by the detectors 13, 1
4, the band feeding device 0
Even if No. 4 is stopped, there are many variations in the stop position at the end of the band, and it is very difficult to control the stop position.

Secondly, since the tip of the standby band in standby is locked to the band stopper 11, for example, the heating plate heats the position slightly rearward from the tip of the band 06. Therefore, when the front and rear ends of the two bands are connected by such connecting means, it is often the case in FIG.
The connection state as shown in (b) occurs. Therefore, FIG.
When the connecting strength of both bands is not sufficient as shown in (b) or before and after the connecting portion as shown in FIG. 6 (a), non-welded connection end portions BS and BE of both bands are generated, which cause various feeding of the packing machine itself. There was a problem that the device part was caught.

The present invention solves the problems of the prior art and provides an automatic band connecting device that achieves the following objects. First, by detecting the end of the band in use, the feed rate of the band is appropriately controlled, and the end is connected to the heater for connection.
It is to make sure to stop at the end within the width. Second,
The position of the tip of the band in standby is to be surely positioned at the end within the width of the heater. Thirdly, it is necessary to prevent the front end portion positioning means of the standby band from interfering with the band feeding. Fourth, to provide a simplified band feed, stop means and connection means for the above purpose.

[0009]

[Means for Solving the Problems] Two band reels are provided, and when the band of the band reel in use is finished to be used, the band of the other band reel in standby can be switched and continuously used. In this automatic packing machine, a means for positioning the tip of the band on standby in the heater width and a termination control device for stopping the end of the band in use within the heater width are also provided. A band automatic connecting device for an automatic packing machine, which is configured to prevent the generation of a portion, wherein the terminal control device includes a terminal end detecting means for the band in use, a switching means for switching the feed motor after the terminal detection to a low speed, and a low speed. A switching means for stopping the feed motor is provided for stopping the end of the band at a predetermined position after the switching to.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an outline of a band supply unit of, for example, an arch type band-cide type automatic packing machine including a band automatic connection means 30 according to the present invention. Bands B are respectively attached to two band reels 20a and 20b which are vertically arranged on the side of the main body of the automatic packing machine and are rotatably supported.
1, B2 are wound. In addition, bands B1 and B
2 is sent to the automatic band connecting device 30 through the band end detecting means 21 and 21, respectively. Band end detecting means 2
1 has the same configuration, each detecting means 21
Is a lever that can rotate about its axis at its approximate center position.
2, a spring 23 that constantly urges this in one direction, and a guide roller that guides the bands B1 and B2 before and after the lever, and the end of the band passes between the guide rollers before and after the lever. Then, the lever 22 is rotated by the force of the spring, and a detector 24 such as a limit switch for detecting the rotation is provided.

The automatic band connecting means 30 is generally composed of means 40 for heating and welding both ends of the band and means 50 for matching the positions of both ends of both bands. First, the means 40 for welding the band by heating and pressing has one heater 41, a pressing device 42 composed of a fixed and moving pressing member, and a pressing device driving part 43. Then, the heater 41 is provided on the side orthogonal to the traveling direction of the band, to the appropriate driving means 4 as shown in FIG.
4 is movable, and is interposed in the band passage only when heating the band, and normally stands by at the retracted position on the side of the passage as shown in FIG.

In FIG. 2 showing the details of the band connecting portion,
The means 50 for matching the both ends of the band has a guide support 51 having a substantially wedge-shaped cross section, and the bands B1 and B2 are guided along the upper and lower guide surfaces 51a and 51b. A passage switching lever is provided downstream of the guide support 51.
52 are provided. The passage switching lever 52 can be moved up and down by lever driving means 54, and has stoppers 52a and 52b integrally formed on the upper and lower sides thereof, and a passage 53 for passing a band is formed between the stoppers. At the same time, the respective stoppers 52 are moved by the vertical movement of the lever.
One of a and 52b is located on the front side of one guide surface of the guide support body 51, and the tip end BS of one of the bands B1 and B2 waiting is abutted, and the tip end BS of that band.
Position.

The reverse return preventing devices 60a and 60b have the same structure, and support a lever 61 having a substantially L shape so as to be rotatable by a shaft pin 62, and a pressure contact roller 64 at the tip of the lever. The tension of the spring 63 causes the
It is possible to take two positions, that is, the pressing position and the separating position of the la 64. In the vicinity of the tip of the guide support 51, band end detection means 65 for detecting the presence or absence of bands on both guide surfaces 51a and 51b are provided above and below the guide support, respectively. The structure of the band end detecting means 65 is almost the same as that of the band end detecting means 21.

The band currently in use is a pair of guide rollers.
It is sent to a band chamber (not shown) by a chamber feeder 67 via a la 66. Further, in order to replace a used band reel with a new reel, a means for detecting the presence or absence of a band is provided in the band passage (not shown), and an alarm device for bunting is activated. Further, the tip of the band of the new band reel is abutted against the stopper 52a or 52b of the band passage switching lever 52 to position and fix it.

Next, the operation of the automatic band connecting apparatus according to the present invention will be described. As shown in FIG. 1, the band B1 wound around the first band reel 20a stands by with its tip BS abutting against the upper stopper 52a of the passage switching lever 52. In this case, band B1
Is the band end detection device 2 above the band reel 20a.
1 is guided by the front and rear rollers, and further guided by the upper guide surface 51a of the guide support body 51, and is guided by the upper stopper 52.
It has reached a. Further, while the band B1 is on standby, the L-shaped lever 61 of the reverse return prevention device 60a is rotated clockwise against the tension of the spring 63, and the band B1 is guided by the pressure contact roller 64 at the tip of the lever 61. By pressing and fixing it on 51a, the tip BS of the band is stopped by the stopper 52.
It is prevented from moving backward from the a position.

On the other hand, the band B2 currently in use is located below the second band reel 20b and is located below the band end detecting device 21.
Guided by the lower and upper guide surfaces 51b of the guide support 51 and guided by the front and rear guide rollers of the guide support 51, and passes through the passage 53 of the passage switching lever 52 which can be moved up and down by the driving means 54, and through the pair of guide rollers 66. , And is sent to a band chamber (not shown) by the chamber feed roller 67.

At this time, the lever 61 of the reverse-return prevention device 60b on the lower side is rotated by the spring 63 so that the band B
It is retracted to a position where it does not touch 2. In this state, when the band of the band reel 20b currently in use has been used up, the end BE of the band B2 passes through the band end detection device 21. At this time, the lever 22 arranged between the front and rear guide rollers and pressed against the band B2 is
The band 23 is rotated by the spring 23 as it passes through the end BE, and the rotation is detected by the detector 24. Then, the signal from the detector 24 is sent to a drive motor control device (not shown), and the drive motor is controlled to switch to a low speed rotation. Therefore, the rotation of the chamber feed roller 67 is switched to low speed rotation, and thereafter, the end BE of the band B2 is moved at low speed on the lower guide surface 51b of the guide support 51.

Then, when the end BE of the band B2 passes the band end detection device 65 at a low speed, the lever of the detection device 65 also rotates to activate the detector, and the band end detection signal is issued. Then, in the motor control device (not shown), the rotation of the chamber feed roller 67 is stopped by stopping the drive motor after a lapse of a predetermined time from the input of the end detection signal, so that the band B
The second end BE stops within the width of the pressure device 42 near its rear end.

When the band end BE stops in the pressure device, the heater 41 retracted to the position shown in FIG.
4 is moved to the overheat position shown in FIGS. 1 and 2, and then the pressure head of the pressure device 42 is lifted and pressed to simultaneously heat the lower surface of the tip of the band B1 and the upper surface of the end of the band B2. , Melting their respective surfaces.

Next, the pressure head of the pressure device 42 is once lowered, the heater is retracted, and then the pressure head of the pressure device 42 is again raised and pressed, whereby both bands are formed by a conventionally known method. The front and rear ends of are fused and connected. After that, the pressure of the pressure device is released and the drive motor is driven again,
By the chamber feed roller 67, the band B1 which has already been connected is sent to the band chamber subsequently to the end of B2, and this operation is repeated thereafter.

According to the present invention, first, the tip BS of the band B1, for example, which is on standby is brought into contact with the rear side surface of the upper stopper 52a, and further the upper guide surface 5 of the guide support body.
The pressure contact roller 64 presses onto 1a and is supported so as not to move backward. Further, at the end of the band B2, the feed speed is made low by the signal of the end detecting means 21 of the first stage, and subsequently, the control device is operated by the signal from the end detecting means 65 to stop the feed. Also, the terminal position can be surely stopped near the rear end of the heater 41 and the pressurizing device, and reliable and accurate connection can be achieved as shown in FIG. 6 (C).

[0022]

The first effect of the present invention is to connect a band, which is moved at a considerably high speed in the operating state of the automatic packing machine, by stopping the end of the band in use at a reliable and accurate position. Of the non-welded end of the band at the connection. The second effect is that the stop position can be reliably ensured by controlling the speed of the band running at high speed in two steps by a simple means. A third effect is that the standby position of the band tip of the spare reel for the above connection can be reliably ensured by a simple means.

A fourth effect is that the tip end position of the band is held within the width of the heater and the pressurizing device in advance so that the non-welded connection end portion is not generated. The additional effect is
Since the two band reels are supported by the frame of the automatic packing machine in the upper and lower positions, it is possible to smoothly introduce and transfer the band to the automatic band connecting device.

[0024]

[Brief description of drawings]

FIG. 1 is a schematic front view of an automatic band connecting device according to the present invention.

FIG. 2 is an enlarged front view of essential parts of the automatic band connecting device shown in FIG.

3 is a plan view of the band automatic connection device shown in FIG. 2. FIG.

FIG. 4 is a schematic view of a conventionally known packing machine.

FIG. 5 is a schematic view of an automatic band connecting device in the above-described conventionally known packing machine.

FIG. 6 is a schematic explanatory diagram of each band connecting portion according to the present invention and a conventional example.

[0025]

[Explanation of symbols]

 20a band reel 20b band reel 21 end detecting means 30 automatic band connecting means 41 heater 42 pressurizing device 51 guide support 52 passage switching lever 52a stopper 52b stopper 53 band passage 65 end detecting means 67 chamber feed roller

Claims (9)

[Claims] 1. A first and a second band reel are provided, and when the band of the band reel in use is finished to be used, the band of the other band roll in standby is switched to enable continuous use. In the automatic packing machine, a means for positioning the tip of the band in standby in the heater width and a terminal control device for stopping the end of the band in use in the heater width are provided, and the non-welded end portion is provided in the vicinity of the band connecting portion. Band automatic connection device for automatic packing machine that does not cause 2. The terminating control device includes a terminating end detecting means for the band in use, a switching means for switching the feed motor after the terminating end detection to a low speed, and a terminating end of the band after switching to the low speed at a predetermined position. The automatic band connecting device according to claim 1, further comprising a stop means for stopping the feed motor. 3. The termination control device has a first termination detection means and a second termination detection means for each band, and the feed motor is driven at a low speed by the output of the first termination detection means. 3. The automatic band connecting device according to claim 1 or 2, characterized in that the feed motor is stopped after a fixed time by the output of the second terminal detecting means. 4. The positioning means has upper and lower stoppers and a band passage between the stoppers, and the stoppers are alternately positioned at a tip portion of one of the bands. Band automatic connection device. 5. The automatic band connecting device according to claim 4, wherein the positioning means has a device for preventing reverse movement of the standby band. 6. The positioning means has upper and lower stoppers mounted on a switching lever with a band passage between them, and driving the lever up and down to move the stopper to the tip of one band and to the other bunt position. The automatic band connecting device according to claim 5, which has a structure for positioning a band passage. 7. The automatic band connecting device according to claim 1, wherein a detecting means for detecting the presence / absence of a band is provided in the band passage, thereby notifying the replacement of the band reel. 8. The automatic band connecting device according to claim 1, wherein the detecting means for detecting the presence or absence of the band also serves as a device for preventing the band from reversing. 9. The automatic band connecting device according to claim 1, wherein the first and second band reels are attached to the side surface of the main body of the automatic packing machine side by side vertically.