JPS6356091B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is applied to overlapping packaging of bread having a surface specified by a long flexible film on which a plurality of characters and patterns (hereinafter referred to as "designs") are repeated at regular intervals. This invention relates to a bread packaging device that always wraps a desired pattern at a specific surface position of the bread.

Conventionally, typical packaging forms for bread have been soft film overwrap packaging, twist packaging, and gusset pillow packaging. Each of these packaging formats has its own characteristics, but overlapping packaging has disadvantages in terms of display effect at stores, but it has problems in terms of prevention of bread aging, resealability, packaging material cost, efficiency of packaging work, stackability, etc. It is also excellent and has been adopted as the most common packaging form.

The film used for conventional overlapping bread wrapping has designs placed at regular intervals and in the same direction.On the other hand, the packaging device consists of a conveyor section that supplies the bread, a film feeding section, and a wrapping section. The movement of these three parts is fixed and operates at a fixed timing set in advance, and the amount of film feeding is done according to the size of the bread, and the amount of film feeding is not controlled during the packaging process. It was a completely driven type.

In this way, the film is fed in according to the size of each loaf of bread without being automatically controlled in response to changes in the situation during the packaging process, that is, without controlling the relationship between the film pattern and the loaf of bread. Even if the device is set so that each pattern on the film is brought to a predetermined position on the bread at the beginning of the packaging process, as the packaging process progresses, the differences in the sizes of the individual pieces of bread are accumulated and Depending on the size of the bread, subsequent errors may accumulate, causing the design to deviate from the desired side of the bread by a wide margin and straddle the corner, which may reduce the display effect it gives to consumers when displayed in stores. It was severely damaged. FIG. 1 is a diagram showing such defective packaging.

Furthermore, in packaging using this method, even if the design is located at the center of the side of the bread, the orientation of the design is opposite on the front and back sides, which also impairs the display effect.

The present invention has been made in view of the above points, and detects the appropriate position of the pattern for each bread package and adjusts the feed amount of the film to correct the pattern position due to differences in the size of each bread or film slipping accident. To provide a device that prevents misalignment from affecting subsequent packaging. Further, the control device according to the present invention is not limited to new devices, but can be added to conventional packaging devices with a small amount of manual processing, and its economical effects are also great. In addition, as described above, the present invention makes it possible to always place a specific design on a specified side of bread, so when printing a design on a film, it is possible to place a design on the front side of the bread and a view on the back side of the bread. It has become possible to use a film that has been printed in the opposite direction. This greatly improves the display effect. The gist of the device of the present invention will be described below.

The device of the present invention is a bread packaging device that intermittently feeds a long soft film with a design that is repeated at regular intervals in predetermined lengths to package bread that has a substantially constant shape and has a plurality of sides; A photoelectric mark detection means for detecting film position detection marks made on the film corresponding to the unit length of the packaging, and a timing signal transmitted by the signal from the detection means and rotation from the main motor of the packaging device. a control motor that rotates in the forward or reverse direction according to a command signal from the determination means; a cam that is rotated in the forward or reverse direction by the control motor; and a cam roller that rotates along the cam in conjunction with the drive from the main motor of the packaging device; and a film feeding adjustment device in which the drive from the main motor of the packaging device is interrupted by the interrupting device. The cam is rotated in the forward or reverse direction by a control motor that rotates in response to a command signal from the discrimination means.
By pressing the cam roller against the peak of the cam, the roll roller for adjusting the film feed is disconnected from the main motor of the packaging device and controls the time it takes to stop rotating, thereby controlling the amount of time the film feed adjustment roller can be applied to a desired surface of the bread. This bread packaging device is characterized by being able to package the bread with the same pattern at all times, and the bread packaging device is provided with a control roller for controlling the feeding of the film based on a signal from the discriminating means to these devices.

FIG. 2 is a schematic side view of the packaging section of the bread packaging apparatus according to the present invention, showing each step. 2nd-
FIG. 1 shows a loaf of bread 1 brought to a waiting station 3, and is waiting to start the packaging process. At this time, the tip of the film 2 hangs down in the forward direction in the direction in which it advances from the back of the bread, and further in front of the film is a lifter table 8 that moves up and down around a fulcrum (not shown) on the left.
The extension line of the upper surface of this lifter table is set to substantially coincide with the extension line of the upper surface of the waiting station 3. Putushiya 4 is bread 1
It functions to push forward onto the lifter table 8. When the pusher 4 is operated, the leading end of the film 2 is brought to the underside of the bread, and the following film is brought to the back side of the bread. The film 2 is connected to a roll film support (not shown) via a guide roll 6, and can be freely pulled out by pulling.

Furthermore, photoelectric mark detection devices 17a and 17b are installed between the guide roll 6 and the roll film support section to detect marks marked on the film. However, it is omitted from FIG. 2-2 onwards.

FIG. 2-2 shows the state in which the bread 1 is completely transferred to the lifter table 8 by the pusher 4. At this time, the film 2 covers the bottom and back of the bread and the lifter table 8 is placed in a horizontal state. Pushiya 4 retreats as it continues to rise. Further, the paper roll 11 placed above the bread 1 and the film 2 starts to descend and starts to pull the film 2 downward. The upper and front surfaces of the bread 1 are also covered with the film 2 by the operation of the paper roll 11.

2-3 shows a state in which the lifter table 8 is at the top dead center and the paper roll 11 is at the bottom dead center. In this state, the film 2 is rotated freely at the lower end of the lifter table 8. It is held under constant pressure by a nip roller 7 and a wrap roller 5 whose position is fixed and whose rotation is controlled.

2-4 shows a state in which the pusher 13 is approaching the loaf of bread 1 in order to push the loaf of bread 1 to the right side in the drawing.

2-5 shows a state in which the pusher 13 is pushing the bread 1 onto the receiving plate 15, and at this time the wrapper roller 5 is either rotating clockwise or at rest. Which state the film is in is determined by a device for detecting the progress of the film, which will be described later, depending on whether the film is ahead of a predetermined position, behind a predetermined position, or is normal. That is, if the wrap roller 5 is stopped for a certain period of time (short time) while the bread 1 is being moved rightward by the pusher 13, the film 2 will not be fed and the portion of the film that has already wrapped the bread 1 will be pulled and shifted. . Also, if the lap roller 5 rotates, the bread 1
The film 2 is fed in synchronized with the wrapping speed of the bread 1, and the lower side of the bread 1 is wrapped.

2-6 shows the pusher 13 in a further advanced state, with the knife 14 at a predetermined position.
cuts the film 2 below the wrapper roller 5.

Figures 2-7 show a state in which packaging is completed and the product is transferred to the next heat sealing section. Note that both sides of the bread are wrapped in wrappers 9 and 10 by means not shown.

By the above process, bread 1 is transferred to film 2.
The standard length of film 2 required for wrapping 1 piece of bread is 1 piece of bread.
The size of the width of the paper drawing roller is determined in advance based on the circumferential length and the overlapping width of the wrapping paper, and is set prior to the wrapping operation. Further, the rotation or stop timing of the wrapper roller 5 is adjusted to an intermediate position that can accommodate both overadvancement and retardation of the film.

In the bread packaging apparatus according to the present invention, the rotation of the wrap roller 5 is stopped by intermittent driving from the main motor of the packaging apparatus between FIGS. 2-4 and 2-5, and the pusher 13 is The basic idea is to adjust the feed amount of the film 2 by controlling the time during which the roll roller 5 stops rotating while the bread 1 is being pushed.

FIG. 3 is a block diagram showing a mechanism for controlling the rotation of the lap roller 5.
A photoelectric mark detection means 17 consisting of a light emitting part 17a and a light receiving part 17b detects the mark 16 on the film, and a signal from the detection means 17 and a timing from a cam 21 and a cam switch or proximity switch 22 attached to the packaging device are detected. The signal is received by a determining means 18 consisting of an electric circuit, which determines the progress of the film 2, and outputs respective output signals if the film 2 is behind or ahead. The control motor 19, which is a step pin motor that can rotate in both opposite directions, is rotated. When the determining means 18 determines that the progress of the film 2 is normal, no output signal is transmitted, or another signal, which will be described later, is transmitted.

The discriminating means 18 issues an output signal "decreasing film feed" when the film is too advanced, and produces an output signal "increasing film feed" when the film is delayed. Then, this output signal is given to the control motor 19, and the cam 20 is rotated in the forward or reverse direction by the control motor 19, which rotates forward or backward according to the output signal.
The amount of time the film 2 is fed is adjusted by controlling the time when the film 2 is intermittent with the drive from the main motor of the packaging device and stops rotating.

Next, we will discuss how it is determined whether the film is ahead of the proper position, behind the proper position, or normal.

FIG. 4 shows the progress of the film 2 according to the relative position of the mark 16 on the film 2 and the photoelectric mark detection means 17a, 17b.
is assumed to proceed in the direction of the arrow.

Then, the state in which the mark 16 is sandwiched between the detecting means 17a and 17b when detecting the progress of the film 2 (FIG. 4-2) is set in advance so as to be normal. In this case, the state shown in FIG. 4-1 shows that the film is delayed, and the state shown in FIG. 4-3 shows that the film is too advanced.

The timing for detecting the progress of the film is selected based on the time when the movement of the film 2 stops in the state shown in Figure 2-4. 21 and cam switch 2
Set 2. This cam switch uses one that emits high (H) level and low (L) level pulse signals.

FIG. 5 shows the relationship between the timing pulses from the cam and cam switch and the output signal from the mark detection means. The timing pulse has a long period with one packaging process as one cycle, and half of one cycle consists of a high potential H pulse and the rest consists of a low potential L pulse. It is also assumed that the mark detection means emits an H level output signal when detecting a mark.

Furthermore, the cam 20 and the cam switch or proximity switch 21 are set so that the timing pulse is switched from H to L or from L to H at the time shown in FIG. 4-2.

Now, when the H level timing pulse and the H level mark detection pulse are input to the advance/delay detection circuit 18b of the discriminating means 18 shown in the block circuit diagram shown in FIG. 6, it is determined that the film 2 is too late. This H-level output is input to the control motor 19 via the one-shot output circuit 18C', and the control motor 19 rotates the cam 20 by a certain angle in the direction B shown in FIG. .

Furthermore, the advance and delay detection circuit 18 of the determining means 18
When an L-level timing pulse and an H-level mark detection pulse are input to b, an L-level output indicating that the film 2 has advanced too far is generated, and this L-level output is sent via the one-shot output circuit 18c. is input to the control motor 19,
The control motor 19 rotates the cam 20 by a certain angle in the direction A shown in FIG.

Note that a mark position confirmation circuit 18a having a built-in timer is connected to the mark detection circuit.
The H level mark detection pulse is set for a certain period of time, e.g.
If it continues for 200 milliseconds or more (the state shown in Fig. 4-2), a signal is sent from the fixed position confirmation circuit to the determining means 18, and the output signal for advancing or delaying the film is reset so as not to be transmitted.

Furthermore, in the above mechanism, the cam 20 is set to return to the original position (standard position) for each delay or advance output signal. Alternatively, a memory circuit may be provided in the discriminating means 18 so that the same correction is performed two or three times in succession. 7th
This is shown in the figure. In this case, when the determination signal is output a predetermined number of times, a signal is issued to return the cam 20 to the standard position.

Next, a specific configuration for rotating and stopping the rotation of the wrapper roller 5 will be described with reference to FIGS. 8 and 9.

The sprocket 25 is constantly rotating with the drive of the main motor of the packaging device.
A pawl 24 is projected from the holder, and a cam roller 23 is provided at the tip of the pawl. The pawl 24 and cam roller 23 are rotated together with the sprocket. The cam roller 23 is a cam 20 attached to a shaft 30.
The cam roller 23 is pressed against the cam roller 23 by a spring.
The claw 24 is rotating around the peak 37 of the cam 20.
Since the sprocket 25 does not mesh with the gear 26 and the rotation of the sprocket 25 is not transmitted to the gear 26, the wrap roller 5 is disconnected from the main motor of the packaging device and stops rotating. When the cam roller 23 reaches the trough 38 of the cam 20, the pawl 24 and the gear 26 are engaged and the rotation of the sprocket 25 is transmitted to the gear 26. The rotation of the gear 26 is transmitted to the wrap roller 5 via a shaft 30 and a coaxial gear 27. As described above, if the wrap roller 5 rotates while in contact with the nip roller 7, the film 2 is forcibly fed in, and conversely, while the wrap roller 5 does not rotate, feeding of the film 2 is stopped.

FIG. 10 shows the relationship between the cam 20 and the cam roller 23 in the packaging process. The cam 20 rotates once in one packaging process of the cam roller 23, and the relationship between the process and the rotation angle is constant. The position of the cam 20 shown by the solid line is the standard position, and the lap roller 5 does not rotate while the cam roller 23 rotates through the rotation angle α in the steps after FIGS. 2-4.

When the film advance determining means 18 determines that the film 2 has advanced too much, the eighth
The control motor 19 shown in the figure is rotated, and the cam 20 attached to the rotating shaft of the control motor 19 is rotated in the direction of arrow A in FIG. When the cam 20 is rotated in the direction of arrow A, the wrapper roller 5 does not rotate while the cam roller 23 rotates through the rotation angle γ (γ>α) in the steps after FIG. Feeding is reduced. Next, determination means 1
8, when it is determined that the film 2 is behind, the cam 20 is rotated in the direction of arrow B, which is the opposite direction to that described above. In this case, while the cam roller 23 rotates at the rotation angle β (β<α) in the steps after FIG. 2-4, the wrapper roller 5 does not rotate and the film 2
The infeed becomes larger than in the standard state.

Further, when the determining means 18 determines that the progress of the film is normal, the cam 20 remains at the position shown by the solid line in FIG.

In FIG. 11, in order to make the film feeding control more effective, in addition to the above device, a control roller 36 is rotated or stopped based on an output signal from a discriminating means of the device. When the film is delayed, the control motor rotates the control roller 36 at a circumferential speed faster than the film feed speed. Furthermore, if the film is advancing too far, the control roller 36 stops rotating, and the film is delayed by a braking action caused by friction with the film. Note that when the film is advancing normally, the control roller 36 is separated from the control motor and rotates freely. With the addition of this device, a considerable amount of modification can be completed in one modification.

In addition, the control motor and control roller 36
The connection is made with an electromagnetic clutch.

The apparatus of the present invention can wrap bread while always arranging the pattern applied to the film constructed as described above at a predetermined position on the bread.

[Brief explanation of the drawing]

Fig. 1 is an overlapping packaging product produced by a conventional device, Fig. 2 is a schematic diagram showing the packaging section of the bread packaging device according to the present invention in order of each process, and Fig. 3 is a block diagram showing the film feed control device of the present invention. Diagrammatically shown, FIG. 4 is a diagram explaining the progress of the film in terms of the positional relationship with the mark detection means, and FIG. 5 is a diagram showing the temporal correlation between the timing pulse and the mark detection signal from the mark detection means. 6 and 7 are circuit block diagrams of the discriminating means, and FIG. 8 is a plan view showing the control motor, cam, cam roller, intermittent means, etc. for controlling the rotation of the lap roller, and FIG. FIG. 9 is a side view of the cam and cam roller, FIG. 10 is an explanatory diagram showing the relationship between the cam, the cam roller, and the packaging process, and FIG. 11 is a diagram showing a film control roller constituting another invention. In the figure, 1 is a loaf of bread, 2 is a film, 4 is a pusher, 5 is a lap roller, 7 is a nip roller, 8 is a lifter table, 11 is a paper roll,
13 is a pusher, 14 is a knife, 16 is a mark, 17 is a photoelectric mark detection means, 18 is a discrimination means, 19 is a control motor, 20 and 21 are cams, 2
3 is a cam roller, 24 is a pawl, 25 is a sprocket, 26, 27 and 28 are gears, and 36 is a control roller.

Claims (1)

[Claims] 1. Intermittently feeding a long soft film with a pattern that is repeated at regular intervals in predetermined lengths,
A bread packaging device for packaging bread having a substantially constant shape having a plurality of surfaces; comprising: a photoelectric mark detection means for detecting a film position detection mark made on a film corresponding to a unit length of the packaging; A determining means for determining the progress of the film in response to a signal from the detecting means and a timing signal transmitted by rotation from the main motor of the packaging device; and a control motor that correctly rotates in the opposite direction according to a command signal from the determining means. and an intermittent means including a cam that is rotated in the forward or reverse direction by the control motor, and a cam roller that is in pressure contact with the cam and rotates along the cam in conjunction with the drive from the main motor of the packaging device; a wrapper roller for adjusting film feeding, in which the drive from the main motor of the packaging device is interrupted by the intermittent means, and the cam is rotated in the forward or reverse direction by a control motor rotated in response to a command signal from the discriminating means;
By pressing the cam roller against the peak of the cam, the roll roller for adjusting the film feed is disconnected from the main motor of the packaging device and controls the time it takes to stop rotating, thereby controlling the amount of time the film feed adjustment roller can be applied to a desired surface of the bread. This bread packaging device is characterized in that the bread can be packaged with the patterns always matching. 2. Intermittently feed a long soft film with a design that repeats at regular intervals in predetermined lengths,
A bread packaging device for packaging bread having a substantially constant shape having a plurality of surfaces; comprising: a photoelectric mark detection means for detecting a film position detection mark made on a film corresponding to a unit length of the packaging; a determining means for determining the progress of the film in response to a signal from the detecting means and a timing signal transmitted by rotation from the main motor of the packaging device; a cam that is rotated in the forward or reverse direction by the first control motor; and a cam roller that is in pressure contact with the cam and rotates along the cam in conjunction with the drive from the main motor of the packaging device. a film feed adjusting wrapper roller whose drive from the main motor of the packaging device is interrupted by the intermittent means; and a second control motor which rotates in response to a signal from the determining means to increase the film feed. and a film feed control roller that functions as a brake to rotate in the direction in which the film is moved or to stop the rotation to reduce the film feed, and the cam is controlled by a first control motor that rotates in response to a command signal from the discriminating means. is rotated in the forward or reverse direction, and the cam roller is pressed against the peak of the cam, thereby controlling the time during which the wrapper roller for film feed adjustment is disconnected from the drive from the main motor of the packaging device and stops rotating. A bread packaging device characterized in that a second control motor controls the rotation of a control roller so that bread can be packaged with a desired pattern always aligned on a predetermined surface of the bread.