JPH0920304A - Wrapping machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rapidly remove an article to be wrapped by making an emergency stop of the action of each device, and automatically release the braking to manually and immediately operate each device when an error such as clogging of the article to be wrapped is generated. SOLUTION: When clogging, etc., of an article B to be wrapped is generated in a wrapping part 3 and the signal is outputted from an error sensor 61, energization is switched off to a belt drive motor of a film feeding device, an elevation/lowering motor 81 of a lifting device 80, a right and left folding plate drive motor 87 of a folding device 82, a post-folding motor 88, a motor 89 for driving 21 discharge pusher, a tray carry-in motor 13, and a space adjustment motor 42. Each motor is emergency-stopped by operating brakes 81a, 87a, 88a, 89a, 13a, 42a, etc. After each motor is completely stopped, the braking by each brake is automatically released. The lifting device 80, the folding device 81, etc. are manually and immediately operated thereby to rapidly remove the article B to be wrapped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wrapping machine for wrapping an item to be packaged such as a fresh food item with a polyethylene film.

[0002]

2. Description of the Related Art There is known a wrapping machine for wrapping an item to be packaged, such as a perishable food item stored in a tray, with the above film. In general, this type of packaging machine feeds a film, which is unwound from a film roll by a film supply device and cut into a predetermined size, with its both side edges sandwiched by a conveyor belt, and conveys it to the packaging section. While holding the film in a tension state, the film is pushed up from below the film by a lift device while being stored in a tray, and in the pushed state, the folding device is used to fold the front, rear, left and right side edges of the film into a plurality of folds. The plate is configured to be folded and packaged on the bottom side of the tray.

In this type of packaging machine, as disclosed in, for example, Japanese Patent Application Laid-Open No. 61-81914, when an emergency occurs such as clogging of an article to be packaged, an emergency stop is performed, or It is known that an operator operates an emergency stop switch to make an emergency stop of a packaging machine. In that case, based on the stop signal from the emergency stop switch or the error signal from the error sensor, for example, the operations of the film supply device, the lift device, the folding device, and the like are positively braked by a braking means such as a brake, so that each of the above devices is An emergency stop is desirable.

[0004]

By the way, in the case where the above-mentioned devices are configured to make an emergency stop using the braking means as described above, the braking state by the braking means is maintained even after the emergency stop. Become. Then, in order to release the braking by the braking means, it is necessary to turn off the power supply or to provide a special braking release switch and operate the braking release switch to release the braking by the braking means. It will be. Therefore, for example, when taking out a packaged part packed in the packaging part after an emergency stop, the power must be turned off or the braking release switch must be operated to release the braking state by the braking means. Since it cannot be removed from the packaging part, the release operation is troublesome and time-consuming, and even if it can be handled as a product again if it can be taken out quickly, it will be slow to take out and damage will be large. There was a problem that the product value was lost.

Therefore, according to the present invention, when an error occurs, various actuating devices in the packaging machine can be emergency stopped by the braking means, but after the stopping, the braking by the braking means is automatically released, and the packaged product is packaged. An object is to provide a packaging machine that can quickly and easily remove products and the like.

[0006]

In order to achieve the above object, the invention according to claim 1 of the present application (hereinafter referred to as "first invention") is to hold a film in a packaging portion under tension and A packaging machine that pushes up a packaged article from the package and folds the peripheral edge of the film to the bottom side of the packaged article in that state, and a braking means for stopping the operation of various actuating devices that perform the packaging operation. Is provided,
There is provided error signal output means for outputting an error signal when an error occurs in these actuating devices, and the braking means of the actuating device is actuated on the basis of the error signal output from the output means to perform these operations. A controller is provided for stopping the devices in an emergency and for releasing the braking by the braking means of the operating device at least at the location where the error occurs after the operating devices are stopped.

The invention according to claim 2 of the present application (hereinafter referred to as the "second invention") is characterized in that the operating device is a film supply device, a lift device, and a folding device.

Furthermore, in the invention according to claim 3 of the present application (hereinafter referred to as "third invention"), the error signal output means outputs an error signal by a manual operation, and an error occurs in the operating device. Is one or both of the error sensors that automatically detect and output an error signal.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 to 3, the packaging machine 1 according to this embodiment is provided with a weighing-in / carrying-in device 10 provided at the center of the front surface of a main body 2 and also at both sides of the main body 1. In the main body, the film accommodating portions 20a and 20b and the film F fed from one of the film rolls A and A'having different film widths accommodated in the film accommodating portions 20a and 20b are captured. A film supply device 30 that conveys it to the packaging unit 3, and a lift device 80 that pushes up a product B to be packaged, such as a fresh food product, that has been carried in from the weighing-in device 10 from below the film F held in the packaging unit 3. , A folding device 82 for packaging the packaged product B pushed up by the lift device 80 with the film F, and an upper portion of the weighing-in device 10 in front of the packaging part 3. And a sealing device 90 for heat-sealing the film disposed and folded on the bottom surface side of the article to be packaged B.

A display unit 91 is provided above the main body 2.
A console 91 having a and an operation section 91b is installed, and the main control unit 100 built in the console 91 controls the operation of each of the devices 10, 30, 80, 82, and the weighing-in device 10 described above. The price of the packaged product B is calculated based on the signal indicating the weight of the packaged product B measured by. Further, an auto-labeler 92 is installed above the folding device 82, and the weight and price of the article B to be packaged are printed on a label based on the output signal from the console 91 and issued. The label is automatically attached to the packaged product B located on the sealing device 90.

The structure of the film supply device 30 will now be described. The supply device 30 includes film rolls A and A'contained in the film accommodating portions 20a and 20b.
A pair of left and right film feeding mechanisms 31, 32 for feeding the films F, F while capturing them, and a film feeding mechanism 33 for feeding the film F to the packaging unit 3 located in the central portion,
The film F fed from each of the feeding mechanisms 31 and 32
And a pair of film introduction mechanisms 34 and 35 for selectively introducing the film into the film transport mechanism 33.

As shown in FIG. 3, the film transport mechanism 33 transports while holding one side edge (the right side edge in FIG. 2) of the film F fed from the film feeding mechanism 31, 32. Movable side transport unit 36
And a fixed-side transport unit 37 that transports while sandwiching the other side edge (the left side edge in FIG. 2) of the film F.

Then, these transport units 36, 37
As shown in FIG. 3, two guide rods 38, 38, both ends of which are supported by the main body 2, are provided below the frame 3, and the frame 3 of the movable-side transport unit 36 among them is arranged.
Support blocks 39, 39 fixed to the lower surface of 6a are slidably fitted on the guide rods 38, 38.
Further, below the movable side transport unit 36, a timing belt 40c stretched between the pair of timing pulleys 40a and 40b along the guide rods 38 and 38.
And a sprocket 41a that rotates integrally with one of the timing pulleys 40a and a sprocket 41b that is fixed to the rotation shaft of a gap adjusting drive motor 42 fixed to the main body 2 via a chain 41c. They are linked together. In addition, the timing belt 40c
The support blocks 39, 39 fixed to the lower surface of the frame 36a of the movable side transport unit 36 are fixed to the upper surface of the support block 39. Therefore, by rotating the drive motor 42 in a predetermined direction, the pair of support blocks 39,
39 slides along the guide rods 38, 38,
As a result, the entire movable transport unit 36 is moved in the axial direction of the guide rods 38, 38.
The movable side transport unit 36 and the fixed side transport unit 3
The distance between 7 and 7 can be adjusted appropriately.
On the other hand, the fixed side transport unit 37 is fixed to the main body 2 side while being supported by the ends of the guide rods 38, 38.

Here, the movable side transport unit 36 and the fixed side transport unit 37 have the same configuration. Therefore, the configuration of the movable side transport unit 36 will be described, and the configuration of the fixed side transport unit 37 will be described. Will not be described.

That is, as shown in FIG. 3, the movable side transport unit 36 has a pair of timing pulleys 4 rotatably supported at both ends of an upper portion of its frame 36a.
An upper conveyance belt 43c, which is a timing belt, is stretched between the films 3a and 43b along the conveyance direction of the film F, and between a pair of timing pulleys 44a and 44b rotatably supported at both ends of the frame 36a. Is located below the upper conveyor belt 43c.
A lower conveyance belt 44c, which is a timing belt, is stretched in parallel with 3c. The timing pulley 44b located on the right side in FIG. 3 is adapted to be driven by a belt drive motor 46 capable of forward and reverse rotation. By selecting the rotation direction of the belt drive motor 46,
The film transport direction can be switched by the belt 44c. That is, by operating the belt drive motor 46 counterclockwise, for example, the lower conveyor belt 44
film F sandwiched between c and the upper transport belt 43c
Are conveyed toward the packaging unit 3. In that case, the lower conveyor belt 44c and the upper conveyor belt 43c are arranged in close contact with each other.
One side edge of the film F is reliably sandwiched between c and 44c. The transmission system from the belt drive motor 45 to the timing pulley 44b includes a deceleration pulley 4
5a and a movable pulley 45b that moves in the axial direction following the distance adjustment movement of the movable transport unit 36 are interposed.

The lower conveying belt 44c in the fixed side conveying unit 37 having the same structure as that of the movable side conveying unit 36 also has the film F by the belt driving motor 46 as in the case of the movable side conveying unit 36. The transport direction of the film F is switchably driven, and the other side edge of the film F is clamped by the transport belt 44c and the upper transport belt 43c.

The film feeding mechanisms 31, 32 and the film introducing mechanisms 34, 35 are arranged on both ends of the film transport mechanism 33, respectively. In addition,
Since the film feeding mechanisms 31 and 32 and the film introducing mechanisms 34 and 35 have the same configuration, only one will be described and the other will be omitted.

That is, for example, one film feeding mechanism 31 located on the right side of the film transport mechanism 33 in FIG.
Has a feeding roller 47 that is driven by the power from the belt driving motor 46 and feeds the film F from the film roll A while capturing the film F, and a pressing roller 48 that holds the film F between the feeding roller 47. . The film introducing mechanism 34 is arranged between the film feeding mechanism 31 and the movable side transport unit 36 so as to be vertically swingable. In that case, the film introducing mechanism 34 holds both side edges of the film F between the lower conveyance belts 44c and 44c, and rotates with the rotation of the lower conveyance belts 44c and 44c to rotate the lower conveyance belts 44c and 44c. Introducing belts 49, 49 for feeding the film F to the upper surface of the end portion side, and arranged in front of the front end portions of these introducing belts 49, 49,
A clamp mechanism 50 for clamping the end portion of the film F,
When the introducing mechanism 34 is operating, the introducing belts 49, 49 are lowered to a lower position where they are in contact with the upper surfaces of the lower conveying belts 44c, 44c, and when not operating, the clamping mechanism 5 is used.
Elevating mechanism 51 for raising and retracting the introducing belts 49, 49 to a position above the conveying belts 44c, 44c with the end portion of the film F clamped by 0, and the movable side conveying unit of the introducing belts 49, 49. The introduction belt 49 on the side corresponding to 36 is supported movably in the width direction according to the film width to be used.
And a gap adjusting mechanism (not shown) for adjusting the gap between them.

Then, as shown in FIG. 3, the film introducing mechanism 34 is set to the introducing position where the introducing belts 49, 49 are in contact with the lower conveying belts 44c, 44c, and in this state, the belt driving motor 46 is set. Is operated counterclockwise, the end portion of the film F fed from the feeding roller 47 is transferred to both the transport units 36 and 37 via the film introduction mechanism 34, and both sides in the width direction. It is conveyed to the wrapping unit 3 with the edges being clamped.

Further, a perforation forming device 52 for forming perforations in the width direction of the film F is disposed between the film feeding mechanism 31 and the film introducing mechanism 34, and the introducing mechanism 34 is provided. A pressing member 55, which is driven by a solenoid 54 and presses and holds the film F with the introducing mechanism 34 side while slightly lifting the introducing mechanism 34 side, is provided below. The perforation forming device 52 is provided between the feeding roller 47 and the introduction belt 49, and moves up and down in association with the feeding operation of the film F by the feeding roller 47, so that the perforation is formed in the width direction of the film F. A cutter 53 that forms Then, the film F on which the perforations are formed by the perforation forming device 52 is, for a while, the film transport mechanism 3
3, the feeding roller 47 is stopped in a state where the feeding operation by the feeding mechanism 33 is maintained, and at the same time, the pushing member 55 pushes the feeding belts 49, 49 of the feeding mechanism 34.
Lift the film a little while introducing film F Belts 49, 4
9 and 9 are pressed and held. As a result, the film F is cut from the perforations at the tip position of the introduction belts 49, 49 on the side of the wrapping portion, and the cut film F having a predetermined length is conveyed to the wrapping portion 3, while the end of the remaining film F is cut. The section is held at a predetermined film standby position between the lower conveying belts 44c and 44c and the introducing belts 49 and 49.

In the present embodiment, the belt drive motor 46 for the conveyor belts 44c, 44c is also used for driving the feeding roller 47 and the cutter 53. In that case, a feeding roller with a clutch brake is used as the feeding roller 47, and the feeding roller 47 is belt driven from the speed reduction pulley 45a through an idler 45c, while an operating mechanism of the cutter 53 is provided on the idler shaft 45d of the idler 45c. Pulley with clutch and brake 4
The belt is driven via 5e. In other words, the feeding roller 47 with the clutch brake and the pulley 45e with the clutch brake are controlled so that the feeding roller 47 and the cutter 53 can be operated and stopped at arbitrary timings.

Below the wrapping portion 3 to which the film F is conveyed and supplied by the movable side conveying unit 36 and the fixed side conveying unit 37, as shown in FIG. Weighing-in device 10 for packaged goods B
The above-mentioned lift device 80 for receiving and pushing up to the packaging unit 3 is arranged, and the front, rear, left and right side edge portions of the film F are folded into the bottom surface side of the tray C just above the film F, and The folding device 82 for packaging the article B to be packaged together with the tray C is provided.

The weighing-in / carrying-in device 10 comprises a weighing machine 11 for weighing the articles B to be packed stored in the tray C, and a pair of carrying-in belts 12 arranged on both sides of the weighing machine 11.
12 and a tray loading motor 13 for driving the loading belt
By loading the packaged goods B stored in the tray C on the scale 11, the weight of the packaged goods B is weighed together with the tray C by the scale, and the tray C is As the carry-in belts 12, 12 are driven by the carry-in motor 13, the article B to be packaged is carried into the lift device 80 in a stored state.

The tray C carried into the lift device 80 is
As shown by the chain line in FIG. 2, the lifting drive motor 81 pushes up the film F from below, so that the film F comes into close contact with the upper surface of the article B to be packaged and the width direction of the film F. Both side edges of the film F are held between the conveying belts 43c and 44c in the movable side conveying unit 36 and the fixed side conveying unit 37, and the film F is held in a stretched state in the width direction.

The to-be-packaged product B together with the tray C is packaged by the folding device 82 by the film F stretched in this way. That is, the folding device 8
2, a pair of left and right folding plates 83, 84 are arranged opposite to each other in the transverse direction of the film F, and after being arranged in the orientation direction of the film F above the folding plates 83, 84, as shown in FIG. It has a folding plate 85 and a discharge pusher 86 arranged above the folding plate 85. Then, the pair of left and right folding plates 83 and 84 are driven by the left and right folding plate drive motor 87 to move in the direction in which they are in contact with each other along the transport direction of the film F, and the rear folding plate 85 is When driven by the folding plate drive motor 88, the film F is moved back and forth in the transverse direction. Further, the discharge pusher 86 is also driven by the discharge pusher drive motor 89, so that the discharge pusher 86 advances and retracts in the transverse direction of the film F. The film F stretched by the folding plates 83 to 85 as shown by the chain line in FIG.
After the front, rear, left and right side edges of the tray C are folded into the bottom surface of the tray C, the packaged goods B packaged together with the tray C are packed by the discharge pusher 86 which advances at a timing later than the rear folding plate 85. Sealing device 90 arranged in front of 3
Will be pushed towards. The film F folded on the bottom surface side of the tray C extruded on the sealing device 90 is heat-sealed.

Therefore, the present embodiment is configured as follows in the packaging machine configured as described above.

That is, as shown in FIGS. 2 and 3, the belt drive motor 45 of the film supply device 30, the lift drive motor 81 of the lift device 80, the left and right folding plate drive motor 87 of the folding device 82, and the rear folding plate drive. The motor 88, the discharge pusher drive motor 89, the tray carry-in motor 13 of the weighing and carrying-in device 10, and the space adjusting drive motor 42 of the film transport mechanism 33 are respectively energized to apply a brake 46a for a belt drive motor and a brake 8 for a lift drive motor.
1a, left and right folding plate drive motor brakes 87a, rear folding plate drive motor brakes 88a, discharge pusher drive motor brakes 89a, tray loading motor brakes 13
a and the brake 42a for the space adjusting drive motor are provided, and when an error occurs, the belt drive motor 4
6, lift drive motor 81, left and right folding plate drive motor 87,
Rear folding plate drive motor 88, discharge pusher drive motor 89
An emergency stop switch 60 for manual operation for emergency stop of the tray carry-in motor 13 and the interval adjustment drive motor 42 is provided in the operation section 91 of the console 90 shown in FIG.

Further, as shown in FIG. 2, it is provided on a support frame or the like located above the wrapping portion 3 to detect occurrence of jamming of the article B to be packaged or conveyance abnormality of the article B to be packaged, or FIG.
As shown in FIG. 11, a large number of error sensors 61 ... 61 provided at both ends in the length direction of the film transport mechanism 33 and for detecting a film break or film overrun are provided.

Based on the error signal output from the emergency stop switch 60 or the error signal output from the error sensor 61, as shown in the time chart of FIG.
1a, left and right folding plate drive motors 87, rear folding plate drive motors 88, ejection pusher drive motors 89, tray loading motors 13, and brakes 46a of interval adjustment drive motors 42,
81a, 87a, 88a, 89a, 13a, 42a, the feeding roller 47 with the clutch brake and the pulley 45e with the clutch brake are braked, and the motors 46,
81, 87, 88, 89, 13, 42, the feeding roller 47 with the clutch brake, and the pulley 45e with the clutch brake are each emergency stopped, and the motors 4 are
After complete stoppage of 6, 81, 87, 88, 89, 13, 42, each of these motors 46, 81, 87, 88, 89,
13, 42 brakes 46a, 81a, 87a, 88
There is provided a controller 70 for releasing the braking of the feeding rollers 47 with clutch brakes, and the pulleys 45e with clutch brakes a, 89a, 13a, 42a.

That is, as shown in FIG. 4, an emergency stop switch 60 and a large number of error sensors 61 ... 61 are connected to the input side of the controller 70, while the belt drive is connected to the output side of the controller 70. A motor 46, a belt drive motor brake 46a, a lift drive motor 81,
Lifting drive motor brake 81a, left and right folding plate drive motor 87, left and right folding plate drive motor brake 87a, rear folding plate drive motor 88, rear folding plate drive motor brake 8
8a, discharge pusher drive motor 89, discharge pusher drive motor brake 89a, tray carry-in motor 13, tray carry-in motor brake 13a, interval adjustment drive motor 4
2. The brake 42a for the space adjusting drive motor, the feeding roller 47 with the clutch brake, and the pulley 45e with the clutch brake are connected to each other. A main control unit 100 built in the console 91 shown in FIG. 1 is connected to the controller 70. In the present embodiment, when the emergency stop switch 60 is turned on, the power is turned off without the controller 70, and the belt drive motor 46, the elevation drive motor 81, the left and right folding plate drive motor 87, the rear The folding plate drive motor 88, the discharge pusher drive motor 89, the tray loading motor 13 and the space adjustment drive motor 42 are de-energized, and the controller 70 causes the motors 46, 81, 87, 88, 89, 13, 4
Two brakes 46a, 81a, 87a, 88a, 89
A, 13a, 42a, the feeding roller 47 with a clutch brake, and the pulley 45e with a clutch brake are braked. On the other hand, when an error signal from one of the error sensors 61 is input to the controller 70, the controller 70 causes the belt drive motor 46, the lift drive motor 81, the left and right folding plate drive motor 8 to be driven.
7, rear folding plate drive motor 88, discharge pusher drive motor 89, tray loading motor 13 and spacing adjustment drive motor 4
2 is turned off and each of these motors 46, 8
1, 87, 88, 89, 13, 42 brakes 46
a, 81a, 87a, 88a, 89a, 13a, 42a
The feeding roller 47 with the clutch brake and the pulley 45e with the clutch brake are braked.

Next, the operation of the packaging machine having the above construction will be described.

For example, when the emergency stop switch 60 is manually operated and turned on due to occurrence of an emergency, the power is turned off and the belt drive motor 4 in the film supply device 30 is turned on.
5, the lifting drive motor 81 in the lift device 80, the left and right folding plate drive motor 87 in the folding device 82, the rear folding plate drive motor 88, the discharge pusher driving motor 89, the tray loading motor 13 and the interval adjustment driving motor 42 are energized. While being turned off, the controller 70 controls the brakes 46a, 81a, 87a, 88a, 89a of the motors 46, 81, 87, 88, 89, 13, 42 based on the error signal output from the switch 60. Thirteen
a, 42a, the feeding roller 47 with the clutch brake, and the pulley 45e with the clutch brake are output to the brake signals respectively, and the brakes 46, 81, 87,
88, 89, 13, 42 by the above motors 46, 8
1, 87, 88, 89, 13, 42, the feeding roller 47 with a clutch brake, and the pulley 45e with a clutch brake are each brought to an emergency stop. The controller 70 then controls the motors 46, 81, 87, 88, 8
9, 13, 42 and feeding roller 47 with clutch brake
After the pulley 45e with the clutch and brake is completely stopped, each of the motors 46, 81, 87, 88, 8
9, 13, 42 brakes 46a, 81a, 87a,
88a, 89a, 13a, 42a, feeding roller 47 with clutch brake, and pulley 45 with clutch brake
A brake release signal is output to each of e to output the brakes 46a, 81a, 87a, 88a, 89a, 13
The braking by the a and 42a, the feeding roller 47 with the clutch brake and the pulley 45e with the clutch brake is automatically released. Thereby, for example, when performing processing such as removal of the article B to be packaged sandwiched in the packaging unit 3, the lift device 80, the folding device 81, or the like with the article B to be packaged can be immediately moved manually.
It becomes possible to quickly remove the packaged item B. As a result, it is possible to suppress damage to the packaged item B and handle it again as a product.

On the other hand, for example, the product B to be packaged in the packaging unit 3
When an error signal is output from the error sensor 61 due to an error such as clogging of the film, the controller 70 causes the belt drive motor 46 in the film supply device 30 and the lift drive motor in the lift device 80 based on the error signal. 81, the left and right folding plate driving motors 87, the rear folding plate driving motors 88, the ejection pusher driving motors 89, the tray loading motors 13 and the interval adjustment driving motors 42 in the folding device 82 are turned off, and the respective motors 46, 81, 87, 88, 89, 13, 42 brakes 46a, 81a, 87a, 88a, 89a, 1
3a, 42a and feeding roller 47 with clutch brake
In addition, the brakes of the clutch-brake pulley 45e are actuated to operate the motors 46, 81, 8 respectively.
7, 88, 89, 13, 42, the feeding roller 47 with the clutch brake, and the pulley 45e with the clutch brake are respectively brought to an emergency stop. Then, the controller 70
Is the motor 46, 81, 87, 88, 89, 1
3, 42, the feeding roller 47 with the clutch brake and the pulley 45e with the clutch brake are completely stopped,
Each of the brakes 46a, 81a, 87a, 88a, 89
The braking by the feeding rollers 47a, 13a and 42a, the feeding roller 47 with the clutch brake and the pulley 45e with the clutch brake is automatically released. Accordingly, for example, when the removal processing of the packaged article B sandwiched in the packaging unit 3 is performed, the lift device 80, the folding device 81, and the like can be immediately moved manually to remove the sandwiched packaged article B. It can be done promptly. As a result, it is possible to suppress damage to the packaged item B and handle it again as a product.

In the above embodiment, the error sensor 61 is used.
Although all the brakes are released when the error signal is output from, the motor may be released only at the place where the error occurs or the place related to it.

Further, although a friction brake mainly composed of an electromagnetic brake is used as the braking means, other than this, a braking means other than the friction brake, for example, a dynamic force such as applying a braking force by stopping the magnetic field by controlling the power source. Of course, it may be a brake.

Further, in the above embodiment, the error sensor 6
Although the description has been given of the one that directly detects the occurrence of clogging of the packaged product B, the abnormal conveyance of the packaged product B, or the detection of the film breakage, the film overrun, etc. The present invention is not limited to these sensors, for example, is provided in each operating device such as the lift device 80 and the film transport mechanism 33, and the operating time from the start to the stop of the operating portion of each operating device is monitored and its operation is performed. A check mechanism (not shown) for checking an abnormality due to time over may be used as the error sensor 61.

Further, in the above embodiment, as the error signal output means, the emergency stop switch 60 for manually outputting the error signal and the error for automatically detecting the occurrence of the error in the operating device and outputting the error signal. Although the one using both the sensor 61 has been described, it goes without saying that only one of the emergency stop switch 60 and the error sensor 61 may be used.

[0039]

As described above, according to the first aspect of the present invention, when an error such as clogging of a product to be packaged occurs and an error signal is output from the error signal output means to the controller, this error signal is output. Based on the above, the controller activates the braking means of various operating means to stop the operation of these operating devices in an emergency, and after the emergency stop of these operating devices, automatically releases the braking by the braking means. Is possible. Thus, for example, when performing a process of removing the object to be packaged that has been sandwiched in the packaging unit, the operating device such as the lifting device and the folding device can be manually moved immediately after the emergency stop of the operating device, and the operating device can be pinched. It becomes possible to promptly perform the removal processing of the packaged object. As a result, the packaged product can be prevented from being damaged and can be handled again as a product.

According to the second invention, the effect of the first invention can be remarkably obtained when the actuating device is the film supply device, the lift device and the folding device.

Further, according to the third invention, the error signal output means includes an emergency stop switch for outputting an error signal by a manual operation and an error for automatically detecting the occurrence of an error in the operating device and outputting the error signal. Since it is composed of a sensor, the above emergency stop is performed when the operator operates the emergency stop switch due to the occurrence of an error or when the error sensor detects the occurrence of an error such as clogging of the packaged item. Based on the error signal output from the switch or the error sensor, the controller actuates the braking means of various actuating devices to cause these actuating devices to make an emergency stop, and after the emergency stopping of these actuating devices, the above-mentioned braking means. It is possible to automatically release the braking by.

[Brief description of the drawings]

FIG. 1 is a front view of a packaging machine according to an embodiment of the present invention.

FIG. 2 is a partially longitudinal side view of the packaging machine.

FIG. 3 is a vertical cross-sectional front view with a part of the film supply device omitted.

FIG. 4 is a control system diagram by a controller.

FIG. 5 is a time chart diagram showing a control state of a brake by a controller.

[Explanation of symbols]

 1 Wrapping Machine 3 Wrapping Department 30 Film Supply Device 60 Emergency Stop Switch 61 Error Sensor 70 Controller 80 Lifting Device 82 Folding Device F Film

Claims (3)

[Claims] 1. A wrapping machine for holding a film in a wrapping portion under tension, pushing up an article to be packaged from below the film, and fold the peripheral edge of the film to the bottom side of the article to be packaged in that state. Various operating devices for performing the packaging operation are provided with braking means for stopping the operation, and error signal output means for outputting an error signal when an error occurs in these operating devices, and , Based on the error signal output from the output means, to actuate the braking means of the actuating device to stop these actuating devices in an emergency, and after stopping these actuating devices, at least brake the actuating device at the location of the error. A packaging machine provided with a controller for releasing braking by means. 2. The packaging machine according to claim 1, wherein the actuating device is a film supply device, a lift device, and a folding device. 3. The error signal output means is one or both of an emergency stop switch that outputs an error signal by a manual operation and an error sensor that automatically detects the occurrence of an error in the operating device and outputs an error signal. The packaging machine according to claim 1, wherein the packaging machine is a packaging machine.