JPH0114098B2 - - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention provides a method for removing a film by rotating the end of a film pulled out from a film outlet of a device main body to the bottom of an article, and further pulling out the film. This invention relates to a manual packaging device for wrapping.

(Prior Art) Conventionally, in this type of packaging device, the end of the film pulled out from the film lead-out portion of the device body is
The work panel on the upper surface of the main body of the apparatus is used to rotate the film to the bottom of the article, pull out the film, wind the article, and then cut the film.

(Problem to be Solved by the Invention) However, in the past, the amount of film to be pulled out was determined by the operator's visual judgment, so the position of the film end at the bottom of the article was different, and the film was not aligned with the article. The amount used may be excessive or insufficient, resulting in wasted costs in the former case and unreliable packaging in the latter case.

Therefore, the applicant filed a patent application in 1983 prior to this application.
- No. 38811 has been filed for a film in which the primary and secondary withdrawal amounts are made constant, and the application is based on the primary withdrawal amount a and the secondary withdrawal amount b before packaging the product. Since it is necessary to set the dial, when setting the item, measure the item with a ruler, determine the amount of each drawer taking into consideration the elongation of the film, etc., and then adjust the setting value of the dial while wrapping. It was something I needed.

Therefore, an object of the present invention is to prevent wasted costs due to excessive use of film and packaging uncertainties due to insufficient use of film by using an appropriate amount of film for an article, and also to prevent the shape, etc. of the article to be packaged. To provide a manual packaging device which can easily set the amount of film to be used when it changes, is simple to operate, does not require skill in handling, and is excellent in usability.

[Structure of the invention]

(Means for Solving the Problems) The present invention is an apparatus for packaging articles by manually pulling out a film from a pull-out position, in which a film roll with the film wound thereon is placed at the pull-out position. A mounting roller is provided that rotates when the film is pulled out, and a detection device is provided to detect the amount of the film to be pulled out, and a data storage device and a data detector are provided with detection values from the detection device. is provided, and is switchable between a first state and a second state, and when switched to the first state, a detected value from the detecting device is stored as a set value in the data storage device when the film is pulled out. with the second
A switching device is provided for supplying a detection value from the detection device to the data detector when the film is pulled out when the state is switched to the second state, and a switching device is provided that supplies the detection value from the detection device to the data detector when the film is pulled out; A coincidence detector is provided for comparing a set value and a detected value given to the data detector, and the set value stored in the data storage device and the detected value given to the data detector are compared with each other. A brake mechanism is provided that brakes the loading roller to stop the film from being pulled out when the values match. It is characterized in that it is provided with a reset means for performing the reset.

(Function) According to the above-mentioned means, when the shape of the article to be wrapped changes, when the switching device is switched to the first state and the wrapping operation is performed as usual, the amount of film pulled out at that time is stored as the set value. Then, when the switching device is switched to the second state, the amount of film to be pulled out is controlled based on the above-mentioned set value, so that the amount of film used during packaging can be appropriate, and the amount of film that can be wrapped can be reduced. The setting operation when the shape of the article changes is simple, does not require any skill, and is easy to use.

(Example) An example of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a frame-shaped main body, and a pair of front and rear mounting rollers 2 and 3 are rotatably disposed at the rear thereof. A film roll 5 made of a film 4 wound around a winding frame 5a is placed on the placing rollers 2 and 3. Reference numeral 6 denotes a lid plate which also serves as a work plate and is disposed on the upper surface of the approximately middle part of the main body 1. A base plate 7 for packaging work is disposed on the upper surface of this plate so as to be movable back and forth. A protrusion 8 made of a metal plate for guiding the film 4 is provided at the portion. Reference numeral 9 denotes a base plate for welding work disposed at the front of the main body 1. An adhesive hot plate 10 is disposed on the upper surface of the base plate 9, and a panel plate portion 11 is disposed on the rear edge of the base plate 9. is formed. Reference numeral 12 denotes a holder made of a metal plate that is non-slip with respect to the film 4, and this is positioned between the protrusion 8 and the base plate 9 in the main body 1, and is attached to the main body 1 in the direction of arrow A through the shaft 12a. and is pivotably supported to be rotatable in the opposite direction of arrow A. A front holding part 13 and a rear holding part 14 each having a flat upper surface extend from the front and rear parts of the holding body 12.
Further, on the rear surface of the rear holding portion 14 of this holding body 12, there is provided a film guide 15 having a slippery property against the film 4.
is installed. A coil spring 16 is stretched between the holder 12 and the main body 1, and the holder 12 is always urged to rotate in the direction of arrow A.
Reference numeral 17 denotes a heat cutter located within the front holding part 13 and fixed to the main body 1, and an opening 13a facing the heat cutter 17 is provided on the upper surface of the front holding part 13. Reference numerals 18 and 18 designate roller levers whose middle portions are pivotally mounted on the left and right side plates of the main body 1, one end of which is rotatably bridged with a pressure roller 19, and the other end of which the pressure roller 19 is always connected with an arrow. B direction (upward)
A spring 20 is tensioned to bias the rotation. 2
Reference numeral 1 denotes a guide roller disposed close to the film guide 17, and the mounting rollers 2 and 3 and this guide roller 21 constitute a film supply mechanism 22. 23 is a detection device, which is constructed as follows. That is, in FIG. 3, 24 is a detection disk, which is attached to the mounting roller 3 to rotate together with it, and the detection disk 24 has 10 detection holes 25 arranged on the same circumference. are arranged at equal intervals. Reference numeral 26 denotes a photoelectric proximity switch made of, for example, a photocoupler, which is provided opposite to the rotation locus of the detection hole 25 of the detection disk 24, and outputs a detection pulse as one detection signal in response to passage of one detection hole 25. It's starting to happen. In this case, the outer diameter d of the above-mentioned placing roller 3 is set to 32 mm, and therefore, the film 4 is approximately removed per rotation of the placing roller 3.
This means that 100 mm has been drawn out, and approximately 10 mm of film 4 has been drawn out for each detection pulse. 27 is a brake mechanism, which will be explained below. Reference numeral 28 denotes a ratchet provided on the mounting roller 3 to rotate integrally therewith. Ten claws 29 are formed at equal intervals on the outer periphery of the ratchet 28, and each claw 29 is attached to the detection disc 24. The detection holes 25 are located between each other. Reference numeral 30 denotes a lock lever, the base end of which is rotatably pivoted on the base frame 1, and the distal end thereof has an engaging pawl that engages with the pawl 29 when rotated in the direction of arrow C. 31 is formed. 32 is a solenoid, and its plunger 32a is connected to the lock lever 30. When the solenoid 32 is energized, the plunger 32a is moved upward from the solid line position in FIG. 3, and the lock lever 30 is rotated in the direction of arrow C. The engagement claw 31 is engaged with the claw 29 to brake the rotation of the mounting roller 3. In FIG. 2, 33 is a lever switch for releasing the primary lock, which is provided on the base frame 1 in correspondence with the holder 12, and when the holder 12 is rotated in the opposite direction of arrow A. The actuator 33a is pressed and turned on. In Fig. 1, 34 is an arm switch for releasing the secondary lock, and this is the arm switch for releasing the secondary lock.
is provided corresponding to the roller lever 18,
When the roller lever 18 is rotated in the opposite direction of arrow B, its actuator 34a is pressed and turned on. In FIG. 4, numeral 35 is a control circuit, and in detail below, numeral 36 is a data storage device that stores the primary withdrawal amount a and the secondary withdrawal amount b of the film 4 as digital signals, and includes two counters 36a. and 36b.
37 is a data detector consisting of two counters 37a and 37b, which is designed to count pulse signals from the detection device 23. 38 is a coincidence detection circuit consisting of two digital comparators 38a and 38b, which compares both outputs of counters 36a and 37a and counter 36.
Digital comparator 3 that compares both outputs of b and 37b
8b. 39 is a solenoid drive circuit that drives the solenoid 32 of the brake mechanism 27;
It is controlled by the outputs of digital comparators 38a and 38b. 40 is a switching device, a first changeover switch 40a for setting the primary withdrawal amount a, and a second changeover switch 40 for setting the secondary withdrawal amount b.
It has b.

Next, the operation of the above configuration will be explained. As shown in FIG. 2, the film 4 from the film roll 5 is hung on a guide roller 21 and drawn upward along the film guide 15.
The drawer end portions of the drawer are held in close contact with the rear holding portion 14 and the front holding portion 13 so as to be bridge-held.

First, a description will be given of an operation for setting the primary withdrawal amount a and the secondary withdrawal amount b of the film 4 when the shape of the article A to be packaged changes, for example.

(a) Place the article A in the tray B, place the tray B on the base plate 7, and set the first changeover switch 40a to the first state, that is, so that the contact piece (c-a) is closed. Switch. Then, the switching device 40 clears the counter 36a of the data storage device 36 and comes to accept the pulse signal from the detection device 23. From this state, when the film 4 is pulled out upward and slightly toward the front by grasping the end of the film 4 as shown in FIG. Detection pulses are output from the detection device 23 in accordance with the rotation of the mounting roller 3, and the pulses are counted by the counter 36a.
Then, the pulled-out film 4 is guided in the direction of the base plate 7, that is, toward the rear, and the base plate 7 is used to wrap the film 4 around the bottom surface of the tray B as shown in FIG. When the primary pull-out amount of the film 4 reaches the optimum value depending on the shape, the first changeover switch 40a is set to the second state, that is, the contact piece (c-
b) When switching is made so that the gap is closed, the counter 36a stores the number of detection pulses inputted up to that point, and stops counting from then on. That is, when the primary pull-out amount of the film 4 is 120 mm, a count value of "12" is stored in the counter 36a. When the first changeover switch 40a is operated as described above, the solenoid drive circuit 39 is simultaneously activated, the solenoid 32 is energized, the brake mechanism 27 is activated, and the supply of the film 4 is stopped. be done.

(b) From this state, tray B is then moved in the direction of arrow V as shown in Figure 5c to fully stretch the film 4 and bring it into contact with the surface of article A under tension. At this time, since the supply of the film 4 is stopped by the operation of the brake mechanism 27, the film 4 is fully stretched.

(c) Next, when the second changeover switch 40b is changed to the first state, that is, the contact piece (ca) is closed, the changeover device 40 clears the counter 36b of the setting device 36 and detects The pulse signal from the device 23 is accepted, and at the same time, the solenoid 32 is de-energized and the operation of the brake mechanism 27 is stopped. From this state, when the tray B is moved in the direction of the arrow F to pull out the film 4 as shown in FIG. 3 is rotated, detection pulses are output from the detection device 23 in accordance with the rotation of the mounting roller 3, and the pulses are counted by the counter 36b. In this way, when the secondary withdrawal amount of the film 4 reaches the optimum value, the second changeover switch 4
When the counter 36b is switched to the second state, that is, the contact piece (c-b) is closed, the counter 36b stores the number of detection pulses inputted up to that point, and stops counting from then on. That is, film 4-2
When the next withdrawal amount is 100 mm, a count value of "10" is stored in the counter 36b. Then, at the same time as the changeover switch 40b is operated, the solenoid drive circuit 39 is activated and the solenoid 3
2 becomes energized, and the brake mechanism 27
is activated, and the supply of film 4 is stopped.

(d) From this state, move tray B further in the direction of arrow F to fully stretch the film 4, then move tray B in the direction of arrow The portion is pressed against the pressure roller 19. With this operation, the holding body 12 is rotated in the direction of arrow A by the film 4, so that the heat cutter 17 is moved to the front holding part 13.
The film 4 protrudes upward from the opening 13a, and the film 4 is fused and cut.At the same time, the roller lever 18 is rotated in the opposite direction of arrow B, and the actuator 34a of the arm switch 34 is pressed and turned on. And this arm switch 3
4, the operation of the brake mechanism 27 is stopped.

By the above operation, the primary withdrawal amount a of the film 4 is
Then, the operation for setting the secondary withdrawal amount b is completed. Next, a procedure for sequentially packaging items having the same shape as item A will be explained.

(e) First, as explained in the above section (a), place the tray B containing the article A on the base plate 7, and from this state, hold the drawer end of the film 4 and
When the film roll 5 and the placing rollers 2 and 3 are rotated as the film 4 is pulled out, as shown in FIG. A detection pulse is output, and the counter 37a of the data detector 37 counts the pulse.
Then, the counted value of the counter 37a and the counter 3
6a is compared with the digital comparator 38a of the coincidence detector 38, and when the two match, that is, when the length of the film 4 has reached the primary drawing amount a of 120 mm, the value of the counter 37a is When the count value reaches "12", the solenoid drive circuit 39 is activated, the solenoid 32 is energized, and the supply of the film 4 is stopped.

(f) In this stopped state, wrap the film 4 as shown in Figure 5b and move it in the direction of arrow F in the figure to fully extend the film 4; (g) Next, as shown in Figure 5c As shown in the figure, when tray B is moved forward and extended, the holder 12 moves in the direction of arrow A.
The actuator 33a of the lever switch 33 is pressed and turned on, but at the same time, the count value of the counter 37a is cleared by a reset means (not shown) and the detection pulse from the counting device 23 is turned on. The signal is switched to be supplied to the counter 37b of the data detector 37, and the operation of the brake mechanism 27 is stopped. Therefore, when the tray B is further moved in the direction of the arrow V, the secondary draw-out of the film 4 is started, and in response to the pull-out of the film 4, the film roll 5 and the mounting rollers 2 and 3 are rotated, respectively, and the film roll 5 and the mounting rollers 2 and 3 are rotated. Detection pulses are output from the detection device 23 in accordance with the rotation of the roller 3, and the pulses are counted by the counter 37b of the data detector 37. Then, the counted value of the counter 37b and the stored value stored in the counter 36b are compared by the digital comparator 38b of the coincidence detector 38, and when the two match, that is, the drawn-out length of the film 4 is the secondary drawn-out amount. When b reaches 100 mm and the count value of the counter 37b is "10", the solenoid drive circuit 39 is activated, the solenoid 32 is energized, and the supply of the film 4 is stopped.

(h) From this state, perform the same operation as described in (d) above to fully stretch film 4, and then
When the film 4 is wrapped at the lower surface of the film 4 and the pressure roller 19 is pressed by the wrapped part, the film 4 is cut by the heat cutter 17 and at the same time, the roller lever 18 is rotated in the opposite direction of arrow B and the arm switch 34 is turned on. When the arm switch 34 is turned on, the count value of the counter 37b is cleared by a reset means (not shown), and the detection pulse from the counting device 23 is reset to the counter 37a of the data detector 37.
At the same time, the brake mechanism 27 is stopped.

After that, both edges 4a, 4a of the film 4 shown in FIG. do.

By repeating the operations (e) to (h) above, trays B containing articles A can be wrapped one after another.
Then, during the packaging work, the primary withdrawal amount a of the film 4 is
and the secondary draw-out amount b will all be the same size from then on, depending on the set value when one piece is first packaged.
The amount of film 4 used is constant for all packages, and wasteful consumption of film and uncertain packaging can be reliably prevented.

In the embodiment described above, by first packaging one article, the primary withdrawal amount a and the secondary withdrawal amount b
are set in the data storage device 36, the amount of film to be used can be easily set, the operation is simple, no skill is required for handling, and the device is extremely user-friendly. .

In addition, the detection device is not limited to an optical type, but a magnetic proximity switch or other length measuring device can be used.
The control circuit 35 may be implemented as a whole using a microcomputer to perform similar control, each detection value of each control circuit may be made to use an analog signal instead of a digital signal, and various other modifications may be made. .

Further, in the above-described embodiment, the primary withdrawal amount a and the secondary withdrawal amount b can be set individually, but the total amount may be set.

〔Effect of the invention〕

As is clear from the above description, the present invention is an apparatus for packaging articles by manually pulling out a film from a pull-out position, in which a film roll around which the film is wound is placed and A mounting roller is provided which rotates in accordance with the pulling out of the film when the film is pulled out, a detecting device is provided for detecting the amount of the film being pulled out, and a data storage device and a data detector are provided to which the detected value from the detecting device is input. and is switchable between a first state and a second state, and when switched to the first state, stores a detected value from the detecting device as a set value in the data storage device when the film is pulled out. Second
A switching device is provided for supplying a detection value from the detection device to the data detector when the film is pulled out when the state is switched to the second state, and a switching device is provided that supplies the detection value from the detection device to the data detector when the film is pulled out; A coincidence detector is provided for comparing a set value and a detected value given to the data detector, and the set value stored in the data storage device and the detected value given to the data detector are compared with each other. A brake mechanism is provided that brakes the loading roller to stop the film from being pulled out when the values match. Since this device is characterized by being equipped with a reset means for resetting the film, when the shape of the article to be wrapped changes, the switching device can be switched to the first state and the wrapping operation can be carried out as usual. The withdrawal amount is stored in the data storage as a set value, and then the switching device is switched to the second
By switching to the state, the amount of film drawn out can be controlled based on the above set value, and therefore,
The amount of film used for an article is appropriate, and it is possible to prevent wasted expenses due to excessive amount of film used and packaging uncertainty due to insufficient amount of film used, and
When the shape etc. of the packaged item changes, the amount of film to be used can be easily set, and it has the excellent effect of being easy to operate and requiring no skill to handle, making it easy to use. .

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is an overall perspective view, Fig. 2 is an enlarged vertical side view, Fig. 3 is an enlarged longitudinal side view of the brake mechanism, and Fig. 4 is a block diagram of the control circuit. , FIGS. 5a to 5e are enlarged longitudinal sectional side views of essential parts for explaining the packaging procedure, and FIG. 6 is a perspective view of the article in a state in the middle of packaging. In the drawings, 1 is a main body, 4 is a film, 5 is a film roll, 7 is a base plate, 10 is an adhesive hot plate, 12 is a holder, 15 is a film guide, 17 is a heat cutter, 22 is a film supply mechanism, and 23 is a detection device,
27 is a brake mechanism, 32 is a solenoid, 35 is a control circuit, 36 is a data storage device, 37 is a data detector, 38 is a coincidence detector, 39 is a solenoid drive circuit, and 40 is a switching device.

Claims (1)

[Scope of Claims] 1. In an apparatus for packaging articles by manually pulling out a film from a pull-out position, when a film roll with the film wound thereon is placed and the film is pulled out at the pull-out position. a mounting roller that rotates in accordance with the pulling out of the film; a detecting device that detects the amount of the film being pulled out; a data storage device and a data detector into which detected values from the detecting device are input; When the first state is switched to the first state, the detection value from the detection device is stored as a set value in the data storage device when the film is pulled out, and the second state is switched to the first state.
a switching device that applies a detection value from the detection device to the data detector when the film is pulled out when switched to a second state; and a setting stored in the data storage device when switched to a second state; a coincidence detector that compares a set value stored in the data storage with a detection value given to the data detector; and a coincidence detector that compares a set value stored in the data storage with a detection value given to the data detector. a brake mechanism that brakes the loading roller to stop the film from being pulled out when the film is stretched; and a brake mechanism that is activated in response to the film stretching operation to release the brake mechanism and reset the detection value of the data detector. A manual packaging device comprising: a reset means for performing the reset operation.