JPH08337205A - Packing machine - Google Patents

Abstract

PURPOSE: To provide a packing machine with which successive packing operation of numerous objects to be packed can be speeded up as a whole by reducing time between substantial completion of a single packing operation of the object and start of a subsequent operation. CONSTITUTION: A packing machine 10 comprises a band end processing mechanism K, a band feed and tightening mechanism S and a controller C for controlling both mechanisms K, S. The controller C controls so that before the band end processing mechanism K restores to a working origin, the band feed and tightening mechanism S starts a band feed process for packing a subsequent object W to be packed, and the band feed process for packing the subsequent object W to be packed by the band feed and tightening mechanism S is controlled based on a working origin detection signal detected before a previous packing operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packing machine which automatically winds a tape-shaped band around an object to be packed and bonds the superposed parts by welding and bonding, and particularly to a large number of objects to be packed. The present invention relates to a control device for a packing machine that rapidly carries out the work of continuously packing.

[0002]

2. Description of the Related Art Conventionally, in order to draw a band around an object to be packed placed on a work table by a band feeding tightening mechanism, the band is clamped between a pair of rollers driven by a motor or the like, and then the band is fed. Is wound around the outer peripheral surface of the object to be packed, and the excess of the winding band is pulled back by the pair of rollers at high speed and low torque, and then the band is pulled back at low speed and high torque, and the band is tightly tightened. At the same time, after that, a band end processing mechanism composed of a cam mechanism driven by another motor or the like heats and melts the superposed portion of the front end portion and the rear end portion of the band by a heater or the like provided in the mechanism, and the melting A packing machine in which parts are crimped by a press, cooled and joined together, and the rear end of the band is cut is well known.

The motor for driving the band delivery tightening mechanism and the band end processing mechanism of these conventional packing machines controls the rotational speed and the moving amount, for example, as quickly and appropriately as the number of pulses. A stepping motor that can be used is used. The two stepping motors that drive the band delivery tightening mechanism and the band end processing mechanism are connected to a control device including a CPU, and are driven separately and selectively based on a command from the control device. It is configured to perform a packing operation consisting of a series of steps.

Further, in an automatic packing machine for continuously packing a large number of objects to be packed, after confirming that the packing work of one object is completed, the packing work of the next object to be packed is performed. It is automatically controlled by the controller to do so. That is, one packing operation is performed by driving the stepping motor of the band end processing mechanism to press and cool the polymerized and melted portion of the band for a predetermined time by pressing, and releasing the pressing, and then the whole packing operation. During the period, it is temporarily completed by moving the slide table held at a position on the same horizontal plane as the upper surface of the work table and removing it from between the object to be packed and the band, but to start the next packing work, By continuously driving the stepping motor of the band end processing mechanism, the band end processing mechanism such as a slide table is in the state of the starting point of the packing work (just before the slide table advances to the work table upper surface and the front clamp rises). Completely complete by returning to the held state, hereinafter referred to as the operating origin).

Further, the position of the operation origin is confirmed by a detection device, an origin position confirmation signal of the detection device is input to the control device, and the control device receives the confirmation signal of the operation origin position, and the band is detected. An output signal for driving the stepping motor of the delivery tightening mechanism is issued, and the stepping motor of the band delivery tightening mechanism is driven based on the output signal, and is sandwiched between a pair of rollers which is the first step of the subsequent packing operation. The band sending process for sending out the band is carried out.

The present applicant has previously proposed an operating origin returning device for accurately returning the band edge processing mechanism to the operating origin (Japanese Patent Application No. 5-249444).
issue). In the proposed operation origin returning device, an operation origin detection cam that also serves as a slide cam is arranged in the band end processing mechanism, and a limit switch provided near the operation origin detection cam rotates the stepping motor. The limit switch is arranged so that it is turned on at a specific angle position before reaching the operation origin near the end of the packing work of the operation origin detection cam rotating with the above, and turned off at the specific angle position after passing the operation origin. During the period from on to off, the pulse counter counts the number of pulses generated from the separately provided timing pulse generating means, and based on the count result, the intermediate point between the two positions, that is, 1 of the count pulse number.
/ 2 positions are regarded as the operation origin and the operation origin is detected, and the stepping motor of the band edge processing mechanism is reversely driven to the considered operation origin and the operation origin detection cam is returned. The position of the operation origin of the band edge processing mechanism is determined by the above.

[0007]

By the way, the conventional packing machine as described above has the above-mentioned structure before the packing work of the next packing object is started after the packing work of one packing object is substantially completed. Step, that is, after removing the slide table from between the object to be packed and the band, continuously drive the stepping motor of the band end processing mechanism, the slide table again advances to the upper surface side of the work table, The process of returning to the vicinity of the operating origin held immediately before the front clamp rises, and returning to the operating origin to accurately detect the operating origin and position the cam of the band end processing mechanism at the accurate operating origin position. A correction process by the device etc. is required. Then, after confirming the accurate positioning of the cam of the band end processing mechanism, in order to start the packing work of the next object to be packed,
It is necessary to drive the stepping motor of the band delivery tightening mechanism to deliver the band based on the output signal from the control device.

The above-described correction process is, so to speak, a process between the previous packaging work and the next packaging work that does not substantially enter the packaging process, and the entire packaging work is continuous depending on the length of the process time. Work time depends on. For this reason, in the automatic packing machine, shortening the stroke is a problem and a problem to achieve high-speed continuous packing work.

The present invention has been made in view of the above problems, and an object thereof is to perform a single packing operation for an object to be packed, particularly in a packing machine for automatically and continuously packing work. By providing a packing machine that can achieve a high-speed continuous packing operation of many items to be packed by shortening the time between the substantial end of is there.

[0010]

[Means for Solving the Problems] To achieve the above object,
A packing machine according to the present invention includes a band edge processing mechanism, a band delivery tightening mechanism, and a control device that controls the both mechanisms. Before the band edge processing mechanism returns to the operation origin in the control device. , The band delivery tightening mechanism is controlled to start the delivery process of the band for the subsequent packing operation of the object to be packed, and the controller controls the band sending tightening mechanism to perform the packing operation of the subsequent object to be packed. Is controlled so as to start based on the operation origin detection signal detected before the preceding packing operation.

Further, as a more specific configuration, the control device is configured to perform the band edge processing based on the operation origin detection signal detected by the operation origin detection device including a permanent magnet and a plurality of magnetic sensors. It is characterized by controlling the mechanism and the band delivery tightening mechanism.

[0012]

[Operation] With the packing machine according to the present invention configured as described above, when the packing work progresses and reaches the final stage of the entire process of one packing work, the packing machine is placed on a position substantially horizontal with the surface of the work table. The held slide table of the band edge processing mechanism is pulled out from between the object to be packed and the band, and the packing operation of one object to be packed is virtually completed.

Then, in order to start the subsequent packing work,
The slide table is operated again so as to move to a position of substantially the same horizontal plane as the surface of the work table, and is also operated so as to return the front clamp to the state (operation origin position) immediately before rising. In the process of the above process,
When the operation origin detection device performs detection in parallel, the permanent magnets of the operation origin detection device rotate, and a plurality of magnetic sensors detect magnetic force of a predetermined value or more in duplicate, and the switches are turned on at the same time. Output signal to control device C
Input to PU.

The output signal to the CPU indicates that the band edge processing mechanism K is located at the operation origin position, and the CPU drives the band edge processing mechanism based on the output signal. Stop and end the process. Subsequent strokes by driving the band edge processing mechanism are sequentially performed with the detected operation origin position as a reference. The band supply tightening mechanism is driven before the end of the entire packing operation of the band end processing mechanism, that is, earlier than when the band end processing mechanism returns to the operation origin position, and the beginning of the subsequent packing operation. Band transmission is started. Then, thereafter, the band supply tightening mechanism is driven intermittently, and the primary tightening and secondary tightening strokes are performed.

The drive command to the band supply tightening mechanism for starting the first stroke of the subsequent packing operation is the operation origin position (timing) detected by the operation origin detecting device before the preceding packing operation. May be performed by a signal calculated with reference to. As described above, the band feeding and tightening mechanism is driven at an earlier timing than when the band end processing mechanism returns to the operation origin position to start the band feeding, which is the first step of the packing work, so that the continuous operation is continued. When carrying out the packing work in accordance with the above, the time required for the whole packing work can be shortened and the continuous packing work can be speeded up.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic front view of the packing machine 10 of this embodiment, showing an automatic example. The packing machine 10 includes a box-shaped main body housing 13 having a work table 14 on which the machine W to be packed is mounted, and a band guide arch portion 15 provided on the main body housing 13.
A band reel 16 loaded with C is stored and supported. Casters 19, 19 ... Are attached to the four corners of the bottom surface of the main body housing 13 so that the entire packing machine 10 can be easily moved.

The band reel 16 includes a drum 17 loaded with the band coil BC, a reel shaft 16a for rotatably supporting the drum 17, and a band reel mounting member to which one end of the reel shaft 16a is fixed. 18 and a band reel brake device 11 arranged between the band reel mounting member 18 and the drum 17. Between the band reel 16 and the work table 14,
A band filling / pool mechanism L including a pool feed roller 21, a pressing roller 22, a band guide 23, and a pool chamber 24, and a stepping motor M ₂ for feeding and tightening the band B supplied from the band filling / pool mechanism L. And a band feeding and tightening mechanism S driven by the same, and a superposed portion of the leading end and the rear end of the fed and tightened band B is heated by a heater or the like, and the melted portion is pressure-bonded by a press or the like and cooled. A band end processing mechanism K driven by a stepping motor M ₁ which is joined and cuts the rear end of the band B.
A binding mechanism consisting of and is arranged.

FIG. 2 is a detailed view of the band edge processing mechanism K. The driving force from the stepping motor M ₁ for driving the cam of the band edge processing mechanism K is decelerated by the speed reducer 30 and the rolling bearing 31a. Camshaft 32 supported by
To be transmitted to. The camshaft 32
Is spanned between the left and right side plates 33a and 33b of the support frame 33, and is pivotally supported on the right side plate 33b by a rolling bearing 31b.

The heater cam 3 is attached to the cam shaft 32.
4, the front clamp cam 35, the press cam 36, the slide cam 37, the rear clamp cam 38, and the middle slide cam 39 are fitted and fixed by the fixing key 40. Each of the cams 34 to 39 has a circular plate-shaped spacer 41 inserted through the cam shaft 32 coaxially with the cams 34 to 39 in a gap formed between the cams adjacent to each other. The cams 34 to 39 and the spacer 41.
Are fastened together by fastening bolts 42, 42.

Left and right side plates 33a of the support frame 33,
A front clamp 43 that moves up and down following the rotation of the front clamp cam 35 is disposed between the portions 33b, and the front clamp 43 includes a spring fitting insertion portion 43a having a gate-shaped cross section, An elongated plate-shaped arm portion (not shown) integrally formed with the spring fitting portion 43a and pivotally supporting the base end portion.
And a head portion 43b integrally formed on the upper part of the spring fitting portion 43a. Further, a guide hole 43f for guiding when the band B is supplied is formed in the head portion 43b.

A cam roller support shaft 43c extending parallel to the arm portion is attached to the spring fitting insertion portion 43a, and a spring member 43g having a cushioning action is provided on the cam roller support shaft 43c. A cam roller 43d which is fitted and inserted and which moves up and down following the front clamp cam 35 is sandwiched at the lower part thereof. The press 44 and the rear clamp 45, which are arranged in a row with the front clamp 43, also have the same arrangement configuration as the front clamp 43 described above, and follow the press cam 36 and the rear clamp cam 38, respectively, and move up and down. Moving cam roller 4
4d and 45d (details of the configuration are omitted). In addition,
A cutter blade 44e for cutting a band is integrally fixed to the upper end portion of the press 44.

A slide table 46, a middle slide member 47, and a heater member (not shown) are provided near the upper end portion between the left and right side plates 33a and 33b, and the camshaft 3 is provided.
The lower pivot shaft (not shown) arranged in parallel with the shaft 2 is swingably arranged. The slide table 4
6, the middle slide member 47, and the heater member respectively include the slide cam 37 and the middle slide cam 3.
9 and each of the heater cams 34 are arranged to be swung.

Next, the operating origin detecting device T of the band edge processing mechanism K will be described. The band edge processing mechanism K
A disk body 50 made of a non-magnetic material is integrally fixed to the side surface of the front clamp cam 35, and one circular permanent magnet 51 is embedded in the outer peripheral side surface of the disk body 50. . At a position facing the outer peripheral side surface of the disc body 50,
A Hall IC support plate 52 is arranged, and the Hall IC support plate 52 is fixed to a support frame 56 of the packing machine 10 with a fixing screw 55.
It is fixed at. As shown in FIG. 3, on the Hall IC support plate 52, two Hall ICs 53 for magnetic force detection, which oppose the permanent magnet 51 and are spaced apart from each other, are arranged on the rotation locus of the permanent magnet 51. , 54 are attached and fixed as magnetic sensors.

The two Hall ICs 53 and 54 are driven by the band end processing mechanism K and the front clamp cam 3 is driven.
The permanent magnet 51 also rotates when the disk body 50 that is integrated with the rotary body 5 rotates, and the permanent magnet 51 is rotated by the permanent magnet 51.
The magnetic force of the permanent magnet 51 is detected when passing through the vicinity of the C53, 54.
4 is closer to the rotating permanent magnet 51,
When the magnetic force to be detected becomes higher than a predetermined value, the switch is turned on to output a signal, and when the permanent magnet 51 is further rotated and the distance becomes longer and the detected magnetic force becomes lower than a constant value, the signal is output when the switch is turned off. It works to stop.

As described above, the two Hall ICs 53 and 54 are arranged at a predetermined interval on the rotation locus of the permanent magnet 51, and the hole ICs are arranged so that the intermediate position of the interval becomes the operation origin. It is attached and fixed to the IC support plate 52 by being divided into right and left with respect to the operation origin position. Therefore, the two Hall ICs 53, 54 differ in the timing of detecting the magnetic force of the rotating permanent magnet 51 and outputting a signal.
Are arranged at appropriate intervals so that there are positions (periods) at which the magnetic forces of more than a predetermined value are redundantly detected and signals are simultaneously output.

Then, the two Hall ICs 53, 54
The two Hall ICs 5 simultaneously output signals.
It can be adjusted by changing the mounting and fixing positions of 3, 54, and the timing (position) at which the signals are output at the same time indicates the operation origin of the band edge processing mechanism K. By adjusting the timing at which the two Hall ICs 53 and 54 output signals at the same time at the origin, the operating origin can have an appropriate width (angle range), but the allowable range is about the front clamp. The rotation angle of the cam 35 is preferably within a range of ± 1.0 °.

FIG. 4 shows a control circuit portion of the control device C of the packing machine 10 of this embodiment. The two Hall ICs 53, 54 of the operation origin detecting device T are connected to an AND gate 57, and the rotating body 50 integrally attached and fixed to the front clamp cam 35 of the band end processing mechanism K rotates. Then, the permanent magnet 51 embedded in the rotating body 50 is rotationally moved to move the two Hall ICs 5
When the two Hall ICs 53 and 54 each detect a magnetic force of a certain value or more, the Hall IC 5
Each of the transistors 3 and 54 is turned on and outputs a signal to the AND gate 57. The AND gate 57 outputs the C signal only when a signal is input from both of the two Hall ICs 53 and 54.
Output a signal to PU (computer). The output signal from the AND gate 57 to the CPU is a signal indicating that each member of the band edge processing mechanism K is located at the operation origin, and the signal is for the packing work of one article W to be packed. It is output once after the end.

Then, one output signal from the CPU is input to the solid state relay SSR of the band sending and tightening mechanism S, and the solid state relay SSR.
Controls the phase of the AC voltage based on the input signal and supplies it to the solenoid actuator 26 as an AC voltage having a specific duty ratio to change the pressing force between the pair of rollers of the band delivery tightening mechanism S. The other output signal from the CPU is a signal for driving the stepping motor M ₁ of the band edge processing mechanism K, and is a pulse oscillator P ₁
By operating the driver D ₁ via
The other output signal from the CPU is the band sending tightening mechanism S.
Drive signal to the stepping motor M ₂ and is performed by operating the driver D ₂ via the pulse generator P ₂ .

Next, each step of the packing work in accordance with the command of the control device C of the packing machine 10 of the present embodiment configured as described above will be described with reference to FIG. In FIG. 5, the horizontal axis represents the time elapsed t of the packing work, and the vertical axis represents the stepping motor M ₂ of the band feeding and tightening mechanism S, the pinch roller solenoid 26, and the stepping motor M of the band end processing mechanism K.
₁ shows each process and the timing of detecting the operation origin with the lapse of time t of the packing work of each of the operation origin detecting device T.

Further, in FIG. 5, (a) and (a ') are
The slide table 46, which is held at a position substantially level with the surface of the work table 14, is attached to the article W and the band B to be packed.
To move the slide table 46 to a position substantially parallel to the surface of the work table 14 in order to effectively finish the work of packing the articles W to be packed and to start the subsequent work of packing. And clamp 4 in front
Step of returning 3 to the state (operating origin position) immediately before rising,
(B) and (b ') are the transmission process of band B, (c),
(C ') is the operating origin detection timing, (d) is the front clamp 4
3 goes up to grip the front end of the band B, (e)
Is the first tightening process of band B, (f) is band B
(G) is a heating process of the overlapping portion of the band B, and (h) is a pressing process of the overlapping portion of the band B.

Further, (I ₁ ), (I ₂ ) are the start times of the packing work of one object W to be packed, (I ₁ ) is the start time of the preceding packing work, and (II ₁ ) Is the start time of the subsequent packing work. (II ₁ ) and (II ₂ ) are the complete end time of the packing work for one object to be packed W and the operation origin position, and (II ₁ ) is the end of the work before the preceding packing work. Timing (working origin position of preceding packing work), (II ₂ )
Is the end time of the preceding packing work (the operation origin position of the following packing work). N is the actual time required for one packing operation.

In the packing work of one article W to be packed in FIG. 5, when the packing work progresses and reaches the final stage of all the steps of the packing work, the process (a), that is, the surface of the work table 14 is almost completed. The slide table 46 held in the same horizontal plane is pulled out from between the article W to be packed and the band B by the swinging motion based on the rotation of the stepping motor M ₁ to pack one article W to be packed. The work is effectively finished.

Then, in order to start the next packing work,
The stepping motor M ₁ of the band edge processing mechanism K is continuously driven to actuate the slide table 46 again to move to a position substantially horizontal with the surface of the work table 14 by a swinging motion. The clamp 43 is operated to return to the state (operation origin position) immediately before being raised.

In the process of the step (a), the detection (c) by the operation origin detecting device T is concurrently performed.
That is, the permanent magnet 51 of the operation origin detection device T is rotated, and the Hall ICs 53 and 54 are in a state where the magnetic force of the permanent magnet 51 can be detected.
When both Hall ICs are switched on at the same time by detecting a magnetic force of a predetermined value or more by 3, 54, an output signal is output to the AND gate 57, and a signal is output from the AND gate 57 and input to the CPU.

The output signal to this CPU is the band edge.
Each member of the processing mechanism K is at the operation origin position for the preceding work.
Set (II₁), The CPU
Is based on the output signal, the band edge processing mechanism K
Of the stepping motor M ₁ Stop the drive of the
The process (a) is finished. And the band edge processing machine
The stepping motor M of structure K₁ By driving
The steps (d), (g), (h) and (a ') are the preceding steps.
Operation origin position for starting packing work (II₁) Based on the above
From the CPU to the stepping motor M₁ Output to
It is carried out sequentially according to the issue. The step (a ') is the step
Performs the same operation as (a) and detects position during the stroke
(C ') is performed and the operation origin position for the subsequent packing work is performed.
(II₂) Is determined.

Meanwhile, the band edge processing mechanism K the stroke by (stepping motor M ₁₎ (a), the state, i.e., the band edge processing mechanism K (stepping motor M ₁₎ is not completed (a ') the working origin position _{(II 1), (II 2} ) the earliest state N ₁ time than return to (start time of the packing work _{(I 1), (I 2} )) in the stepping motor M of the band supply tightening mechanism S ₂ and the pinch roller solenoid 26 are driven, and the first step (b) of the packing work,
Transmission of band B, which is (b '), is started. Then, thereafter, the stepping motor M of the band supply tightening mechanism S.
₂ and the pinch roller solenoid 26 are driven intermittently, and the primary tightening and secondary tightening strokes (e), (f)
Is carried out.

The stepping motor M of the band supply tightening mechanism S for the first step (b ') of the subsequent packing operation.
₂ and the driving command to the solenoid 26 of the pinch roller are based on the operation origin position (II ₁ ) of the preceding packing operation set based on the position detection (c) of the preceding packing operation by the operation origin detecting device T. As a signal output from the CPU, that is, a signal output after the elapse of a specific time calculated based on the detection timing of the operation origin position (II ₁ ).

Therefore, the drive command to the stepping motor M ₂ and the pinch roller solenoid 26 in the step (b) of the packing work, which is one time before the step (b ′) of the band supply tightening mechanism S, is as follows. Operating origin position (timing) detected by packing work before the process (b)
Will be implemented based on. That is, the band supply tightening mechanism S is packing the same object W as the band end processing mechanism K, but is different in the operation origin position (timing) as a reference of its operation. Is.

As described above, the band edge processing mechanism K (stepping motor M ₁ ) is operated by the operation origin position (II ₁ ),
At a time N ₁ earlier than the time of returning to (II ₂ ) (packing work start timing (I ₁ ), (I ₂ )), the stepping motor M ₂ of the band supply tightening mechanism S and the pinch roller solenoid 26 are returned. To start sending band B, which is the first step (b), (b ′) of one packing operation, when the packing operations are continuously performed, The packing work time can be reduced by N _{1 for} each work,
It is possible to speed up the entire continuous packing operation.

Then, the operation origin positions (II ₁ ) and (II ₂ ) of the band end processing mechanism K of the band supply tightening mechanism S.
Time than the return N ₁ only early to _{(I 1), (I 2} )
In order to enable the start of steps (b) and (b '),
In the strokes (a) and (a ′) of the band edge processing mechanism K, the middle slide 47 is changed at an early stage by changing the shape of the middle slide cam 39, for example.
It is necessary to consider returning to the upper part of 4, and
When the slide table 46 is moved by about 80% toward a position substantially horizontal with the surface of the work table 14, the stroke (b) of the band supply tightening mechanism S,
Consideration such as setting the start time (I ₁ ) and (I ₂ ) of (b ′) is necessary.

Due to the above consideration, the strokes (b) and (b ') of the band supply tightening mechanism S are started before the strokes (a) and (a') of the band edge processing mechanism K are completed, and the band Even if B is sent out, there is no obstacle and the band B is guided to the guide hole 43f of the front clamp 43 and the press 44.
It can be delivered by passing it between the upper part and the lower part of the middle slide 47. If the strokes (b) and (b ') of the band supply tightening mechanism S after the consideration is started, the strokes (a) and (a') of the band edge processing mechanism K are started.
Even if it takes time to detect the operation origin by the operation origin detecting device T, the required time does not affect the time required as a whole of the continuous packing work.
That is, the operation origin detection by the operation origin detection device T, and the steps (a), (a ') of the band edge processing mechanism K are performed.
Even if the return to the operation origin position at the final point is slightly delayed, it does not affect the time required for continuous packing work. that's all,
Although one embodiment of the present invention has been described in detail, the present invention is not limited to the above embodiment, and various changes in design may be made without departing from the spirit of the invention described in the claims. It is possible.

[0042]

As can be understood from the above description, the band supply tightening mechanism is driven at a time earlier than the band end processing mechanism of the packing machine of the present invention returns to the operation origin position.
By starting to send out the band, which is the first step of the packing work, the packing work time as a whole can be shortened and the continuous packing work can be speeded up when the packing work is carried out continuously.

Further, a start command of the band delivery process, which is the first process of the packing work by the band supply tightening mechanism, is issued.
Since it is configured to be performed based on the previously detected operation origin detection signal, it is possible to detect the operation origin and return to the operation origin of the band edge processing mechanism even during the band sending process. Also, the recovery can be performed reliably and accurately.

[Brief description of drawings]

FIG. 1 is a schematic front view of a packing machine according to an embodiment of the present invention with a front side wall removed to show an internal configuration thereof.

2 is an enlarged cross-sectional view of a band edge processing mechanism of the packing machine shown in FIG.

FIG. 3 is a schematic perspective view of an operating origin detection device of the packing machine shown in FIG.

FIG. 4 is a diagram showing a control circuit of the packing machine of FIG. 1.

5 is a process chart of a packing operation of the packing machine shown in FIG.

[Explanation of symbols]

 10 ... Packing machine 51 ... Permanent magnet 53 ... Hall IC (magnetic sensor) 54 ... Hall IC (magnetic sensor) C ... Control device K ... Band edge processing mechanism S ... Band feeding tightening mechanism T ... Working origin detection device W ... Packing Items b, b '... Band sending stroke c, c' ... Operating origin position (signal)

Claims (3)

[Claims] 1. A packing machine 10 comprising a band edge processing mechanism K, a band delivery tightening mechanism S, and a control device C for controlling both mechanisms K and S, wherein the control device C comprises the band edge processing. Before the mechanism K returns to the operation origin position c, c ′, the band delivery tightening mechanism S is controlled so as to start the band delivery process b, b ′ for the subsequent packing operation of the article W to be packed. A packing machine characterized by being present. 2. The control device C detects an operation origin position by detecting the band sending step b'for the subsequent packing work of the article W to be packed by the band sending tightening mechanism S before the preceding packing work. The packing machine according to claim 1, wherein the packing machine is controlled to start based on the signal c. 3. The operating origin detecting device T comprising a permanent magnet 51 and a plurality of magnetic sensors 53, 54.
The packing machine according to claim 1 or 2, wherein the band edge processing mechanism K and the band delivery tightening mechanism S are controlled based on the operation origin detection signals c and c ′ detected by. .