JP2001171606A - Vertical bag-making machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the maintenance of a vertical bag-making machine, and to enable the high-speed operation by appropriately setting the operation timing. SOLUTION: A vibration sensor 50 to detect the vibration is provided on a location to which the vibration caused by throwing in works X...X to be packaged propagates, and the operation start timing of a horizontal seal apparatus is set based on the vibration detection signal from this vibration sensor 50.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of bag-making and packaging for continuously producing bag-filled products by enclosing an object to be packaged in a packaging bag while forming the packaging bag.

[0002]

2. Description of the Related Art In general, a vertical bag making and packaging machine used for continuously producing bagged products such as snacks is wound around a tubular chute, wound around a belt, and sealed to overlap. After forming a cylindrical body, while performing horizontal sealing and cutting at predetermined intervals in the width direction to continuously generate packaging bags, in the bag making process, for example, discharged from the collecting chute of the combination weighing machine The objects to be packaged sequentially fed into the cylindrical chute are sealed in individual packaging bags.

[0003] In recent years, in the field of bag making and packaging technology, there is a tendency to improve the productivity by shortening the interval between the articles to be packaged. In this regard, for example, as disclosed in US Pat. No. 4,597,240,
In a vertical bag making and packaging machine of this kind, one I is provided for the chute, and one is provided between the vertical sealing device and the horizontal sealing device.
Attempts have been made to provide an R sensor (infrared sensor) to detect the fall of the packaged object and determine the operation timing for proper operation. In other words, by controlling the operation of the horizontal sealing device so that the packaged object does not bite into the horizontal sealing portion of the packaging bag and further minimizes the time margin, an attempt is made to achieve high-speed operation. In setting the operation timing, it is required to accurately sense the falling state of the packaged object.

[0004]

The bag making and packaging machine described in the above publication uses an IR sensor, which is one of optical sensors, for detecting a falling object to be packaged. It is necessary to provide a slit that has lightness or otherwise allows light to pass through. In this case, even if the chute has a light-transmitting property, the inner surface of the chute may be stained by the falling packaged object as the operation time elapses. In this case, the performance of the sensor to detect the packaged object deteriorates, causing a malfunction. Therefore, it is necessary to periodically adjust the sensitivity of the sensor or clean the inner surface of the chute. Further, even if a slit is provided in the chute, the falling object to be packaged may spill out of the chute from the slit. In this case, a product having an insufficient capacity, dirt around the device, or the like is generated.

[0005] In the IR sensor installed between the vertical sealing device and the horizontal sealing device, an object to be packaged is further detected through a cylindrical packaging material serving as a packaging bag. It must have light properties. Therefore, when the above-described bag making and packaging machine is used, the material of the packaging material is limited.

[0006] In order to achieve high-speed operation by controlling the operation of the horizontal sealing device so that the packaged object does not bite into the horizontal sealing portion of the packaging bag and the time margin is suppressed as much as possible, It is desirable to sense the latest falling condition of the packaged object as much as possible. Therefore, it is desirable to detect the fall of the article to be packaged immediately above the horizontal sealing device, but this cannot be realized by the above-described bag making and packaging machine unless the packaging material has translucency. Even if the IR sensor can be installed directly above the horizontal sealing device, more space is required in the vicinity of the narrow horizontal sealing device, which may cause a layout problem.

For this reason, the installation location of the IR sensor is unavoidable at a location away from the horizontal sealing device. Therefore, as long as the operation of the horizontal sealing device is performed based on the detection signal of the packaged object from this sensor. Control cannot be performed with high accuracy.

[0008] As described above, the above-mentioned vertical bag making and packaging machine has disadvantages, and overcoming this point has been a subject of practical application.

It is an object of the present invention to provide a vertical bag making and packaging machine that facilitates maintenance and enables high-speed operation by setting an appropriate operation timing.

[0010]

Means for Solving the Problems The present invention is characterized by the following constitution in order to solve the above-mentioned problems.

First, an invention according to claim 1 of the present application (hereinafter, referred to as a first invention) is a cylindrical chute into which an article to be packaged is put, disposed below the chute, and hung around the chute. In a vertical bag making and packaging machine having a horizontal sealing device for sandwiching a tubular packaging material to be sandwiched and sealing in a horizontal direction, a vibration detection for detecting the vibration in a portion where the vibration accompanying the insertion of the article to be packaged propagates Means for setting the operation start timing of the horizontal sealing device based on a vibration detection signal from the vibration detecting means.

Further, the invention according to claim 2 (hereinafter referred to as second invention)
According to the first invention, the collecting chute of the combination weighing machine is disposed above the cylindrical chute, and the vibration detecting means is provided on the cylindrical chute or the collecting chute of the combination weighing machine. It is characterized by having.

According to a third aspect of the invention (hereinafter referred to as a third aspect), in the first or second aspect, the setting means is configured to operate from a reference time point during the packaging operation to a time point at which the vibration detection signal is input. Operation timing automatic adjusting means for automatically adjusting the operation start timing of the horizontal sealing device at the time of the next and subsequent packaging operations based on the time.

According to the above arrangement, the following effects can be obtained according to the present invention.

According to the first aspect of the present invention, since vibration detecting means for detecting the vibration is provided at a portion where the vibration accompanying the insertion of the packaged object is propagated, regardless of the translucency of the chute. The falling of the package is detected, and the cleaning of the inner surface of the chute for accurate detection of the package is not required.

[0016] Since the operation start timing of the horizontal sealing device can be appropriately set based on the vibration detection signal from the vibration detecting means, the operation of the horizontal sealing device is started prior to the detection of the vibration, and the article to be packaged passes through the passage. As a result, the horizontal seal can be completed before falling into the packaging material. Therefore, the article to be packaged can be accommodated without being caught in the horizontal seal portion.

Further, since the vibration detecting means is provided at a portion where the vibration propagates, the degree of freedom of the mounting position is increased. For example, even if it is provided at a position distant from the horizontal sealing device such as the upper portion of the chute, the vibration of the lower portion of the chute located immediately above the horizontal sealing device can be accurately detected from the propagation of vibration. Therefore, the operation start timing of the horizontal sealing device can be set with high accuracy while minimizing the time margin, so that high-speed operation can be performed. Then, the problem in the installation space is eliminated.

Here, the operation start timing of the horizontal sealing device refers to a pair of seal members provided in the horizontal sealing device, for example, approaching from a predetermined position and in contact with the pair of sealing members, and thereafter moving away from the predetermined position. Means the timing to start a series of operations.

Further, according to the second aspect, the vibration detecting means is provided in the cylindrical chute or the collecting chute of the combination weighing machine disposed above the chute, so that the noise at the time of propagation is reduced. It is possible to do. Therefore, it becomes possible to detect the propagation of vibration due to the insertion of the packaged object with higher accuracy.

According to the third invention, in the first invention or the second invention, the vibration detection signal is sampled during the operation, and the sampling is performed during a time from a reference time during the packaging operation to the input time of the vibration detection signal. Based on the operation, automatic operation timing setting means for automatically adjusting the operation start timing of the horizontal sealing device at the time of the next and subsequent packaging operations is provided, so that the falling state of the packaged object changes during the operation of the bag making and packaging machine. In this case, it is possible to detect a difference between the state in this case and the initial setting, and newly set an appropriate operation timing of the horizontal sealing device. Therefore, troubles such as the bite of the packaged object in the seal portion can be further avoided, and the trouble of manual adjustment is not required.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail through embodiments of the present invention.

As shown in FIG. 1, a bag making and packaging machine 1 according to this embodiment has a machine base 2, and a roll supporting portion (shown in the figure) which supports a roll of packaging material rotatably above its rear portion. Z)
Is provided, and a former 10 is disposed above a front portion of the machine base 2.

The former 10 has a frame 11 on which a sailor member 12 and a chute 13 penetrating vertically through the sailor member 12 are mounted and integrated, and can be detachably attached to the front upper surface of the machine base 2. Attached,
While guiding the strip-shaped packaging material fed forward from the roll support portion downward, the left and right side edges are overlapped to form a cylindrical shape. . The above shoot 1
Above 3, a collecting chute (not shown) of the combination weighing machine is arranged.

The upper part 14 of the chute 13 projecting upward from the sailor member 12 is formed in a substantially conical shape with a wide open upper end for receiving a package to be loaded, and is shown in FIG. As described above, the lower portion 15 extending below the sailor member 12 protrudes into the wrapping material F formed in a bag shape, and introduces the articles to be packaged X... X into the wrapping material F.

On the left and right sides of the lower portion 15 of the chute 13, belt-type feeding devices 3 and 3 for feeding the packaging material F downward while pressing the packaging material F against the left and right side surfaces 15a of the chute lower portion 15 are arranged. In addition, in front of the chute lower part 15, the packaging material F is supported by the front surface of the machine base 2 via the support member 4, and the left and right side edges of the packaging material F overlapped with each other are welded to form the packaging material F into a cylindrical shape. Vertical sealing device 5
Is arranged.

The right and left side surfaces 15 of the lower portion 15 of the chute 13 against which the feeders 3 and 3 are pressed.
a, 15a and the front surface 1 against which the vertical sealing device 5 is pressed
5b is formed in a planar shape.

Further, slightly below the lower end portion of the chute lower portion 15 on the front surface of the machine base 2, a cylindrical packaging material F is sandwiched from both front and rear sides, and a predetermined position of the packaging material F is horizontally moved. By cutting the vicinity of the welded portion in the horizontal direction, the bottom portion is formed in the tubular packaging material F to form a bag, and the packaged material X of the bag-shaped packaging material F is formed. A horizontal sealing device 6 that seals the upper part of the part where is introduced is disposed.

As shown in FIGS. 1 and 2, the horizontal seal device 6 has a pair of seal members 33, 34 attached to left and right frame members 31, 31 via attachment members 32, 32. . The seal members 33 and 34 are driven by a driving mechanism (not shown) so as to move closer to and come into contact with a predetermined position and then move away from the predetermined position.

Next, the seal members 33 and 34 will be described.

As shown in FIG. 3, one of the seal members 33
Is provided with a cutter guide member 35 and two support members 36, 36 which sandwich the cutter guide member 35 from both sides. The support members 36, 36 have seal jaws 37,
37, and each seal jaw 3
7 and 37, heaters 38 and 38 for heating the seal jaws 37 and 37, and heated seal jaws 3
Temperature sensors 39, 39 for measuring the temperatures of 7, 37
Are inserted in the longitudinal direction.

The other sealing member 34 has substantially the same configuration as the sealing member 33, but the slit forming member 40 is replaced with the supporting member 36 instead of the cutter guiding member 35.
36 in that it is sandwiched by 36.

The sealing jaws 37, 37, 4
1, 41 opposed facing surfaces 37a, 37a, 41a,
Numerous tooth grooves are provided in 41a so as to mesh with each other so that the packaging material F is sandwiched therebetween. Further, the cutter 42 is attached to the right seal member 33 by the support member 3.
It is provided so as to be able to advance and retreat through a cavity provided in a cutter guide member 35 sandwiched between 6, 6. Then, the cutter 42 is connected to the slit forming member 40.
Is provided so as to be able to protrude and retract into the space formed between the seal jaws 41 of the left seal member 34. The cutter 42 is driven by a driving device such as an air cylinder (not shown).

The temperature sensors 39... 39 are conventionally provided with a contact surface 37 of the sealing jaws 37, 37, 41, 41.
a, 37a, 41a, support members 36 apart from 41a ...
In the present embodiment, it is provided in the vicinity of the contact surfaces 37a, 37a, 41a, and 41a. Therefore, it becomes possible to sense a temperature change of the above-mentioned portion in real time, and thus it becomes easy to control the temperature of the above-mentioned portion.

Further, the sealing jaws 37, 37, 4
The materials 1 and 41 are preferably metal materials having high thermal conductivity such as brass, for example. On the other hand, since high thermal conductivity is not required for the support members 36..., A metal material such as iron may be used.

Further, the mounting members 32, 32 have a pair of drop prevention plates 43, 43 and a pair of squeezing plates 44, 44.
And are attached. The fall prevention plates 43, 43 and the squeezing plates 44, 44 are both springs (not shown), and the contact surfaces 37a, 37a, 41a, 41a of the sealing members 33, 34 are provided.
, So that the sealing member 3
3 and 34 come into contact with each other before they come into contact with each other and the cylindrical packaging material F
Is sandwiched in the width direction directly above and below the horizontal seal portion.

Below the horizontal sealing device 6,
An unloading device 7 for unloading the bag formed as described above to the outside of the machine is provided.

In addition to the above configuration, in the bag making and packaging machine 1, the upper part 14 of the chute 13 for detecting the vibration accompanying the passage of the articles to be packaged X... A vibration sensor 50 is attached. In addition,
The installation place of the vibration sensor 50 is not limited to the above-mentioned place, and may be any place as long as the vibration accompanying the insertion of the articles to be packaged X. For example, the vibration sensor 50 may be attached to a collecting chute (not shown) of the combination weighing machine that is located above the chute 13 and guides the packaged objects X to the chute 13.

The vibration sensor 50 that can be used for the purpose of the present application is described in, for example, JP-A-6-249870.
And a large number thereof are disclosed in JP-A-10-9942, JP-A-10-9944 and the like.

Next, a control system of the bag making and packaging machine 1 will be described.

As shown in FIG. 4, the bag making and packaging machine 1 has a control unit 51 built therein. The control unit 51 generally controls the operation of the bag making and packaging machine 1, and controls the operations of the vertical sealing device 3, the feeding device 5, the horizontal sealing device 6, the unloading device 7, and the like. ing. The control unit 51 sends the packaged object X to the weighing machine 52 disposed above the bag making and packaging machine 1.
.., A discharge request signal for X, and a vibration sensor 50
Is input, and the operation start timing of the horizontal sealing device 6 is set based on the signal.

Next, the bag making and packaging machine 1 according to this embodiment
An example of the operation will be described.

First, when the bag making and packaging machine 1 is operated, the band-shaped wrapping material F fed forward from the roll supporting portion provided at the rear of the machine base 2 is moved upward and downward at the front of the machine base 2. While being sent to the packaging material F, the packaging material F is bent by the sailor member 12 constituting the former 10 into a tubular shape so that the left and right side edges overlap. The packaging material F thus formed into a cylindrical shape,
It is fed further downward by the feeders 3 and 3, and on the front side of the lower part 15 of the chute 13, the overlapped left and right side edges are welded by the vertical sealing device 5 to form a cylinder. At this time, the lower end portion of the tubular packaging material F is closed by the horizontal sealing device 6 to form a bag during the previous packaging operation. Then, after the bag-like packaging material F is sent further downward, the objects to be packaged XX are put into the packaging material F from above through the chute 13.

Thereafter, as shown by the chain line in FIG. 2, the bag-shaped packaging material F is positioned above the portion where the packaged objects X... X are introduced, and a pair of sealing members provided in the horizontal sealing device 6. While being sealed by 33 and 34, it is cut off from the upstream part of the packaging material F by the cutter 42 and dropped onto the unloading device 7 below. At this time, the cut packaging material F
Is sealed at the lower end of the upstream portion, and the portion is formed into a bag shape having a bottom portion so as to be ready for introduction of the next packaged object XX.

In this case, since the fall prevention members 43, 43 abut before the seal members 33, 34 abut the packaging material F, the articles to be packaged X... Is prevented, and the sealing members 33 and 34 are prevented from biting the packaged objects X. On the other hand, the squeezing plates 44, 44 also come in contact with the sealing members 33, 34 in the same manner as described above, so that the packaging material F at the corresponding contact portion is squeezed thinly to facilitate the sealing operation by the sealing members 33, 34.

In this manner, a predetermined amount of the packaged objects X... X
Are continuously produced and sequentially carried out of the machine by the carry-out device 7.

Here, the role of the vibration sensor 50 with respect to the operation timing of the seal members 33 and 34 provided in the bag making and packaging machine 1 will be particularly described with reference to FIG. This figure is a time chart showing ideal operation timings of the seal members 33 and 34.

First, a discharge request signal for the objects to be packaged X... X is transmitted from the bag making and packaging machine 1 to the weighing machine 52. Receiving this signal, the weighing machine 52 discharges the articles to be packed X to the bag making and packaging machine 1 side. Then, after the discharge request signal is transmitted, the seal members 33 and 34 operate to approach and come into contact with each other from a predetermined position, and then move away from the predetermined position. On the other hand, the vibration sensor 50 detects that
Detects a vibration that occurs when it collides with the chute 13, and the detected signal is input to the control unit 51. In this case, the falling of the packaged objects X... X occurs with a certain time width. That is, as one of the main causes of the bites of the packaged objects X... X into the seal portion, which is a problem in the operation of the seal members 33 and 34, the head of the fall of the packaged items X. This is because, by sensing the behavior at the head, biting can be avoided.

Here, the time when the above-mentioned discharge request signal is transmitted is set as a reference time of the packaging operation, and from this time, the sealing member 3
The time interval from when the operation start signal is transmitted to the seal members 33 and 34 is t2, and the time interval from the time when the seal members 33 and 34 come into contact with each other is t2. The time interval from the time to the end of the operation is defined as t3. Note that t1 and t2 are fixed time intervals determined by the packaging cycle (illustrated in FIG. 5).

The time interval from when the vibration detection signal is input by the vibration sensor 50 to when the operation start signal of the seal members 33 and 34 is transmitted is defined as t4.
The operation of the seal members 33 and 34 after the operation start signal of the seal members 33 and 34 is transmitted is indicated by a chain line in the figure.

In this case, since t2 and t3 are fixed, at t1, t4 falls at a predetermined time interval, that is, the top of the packaged object X... X falls just before the sealing members 33 and 34 come into contact with each other. The time interval is adjusted so as to be set above the prevention plates 43, 43.

When the packaging cycle is short, it may not be possible to adjust t1. In this case, the timing of transmitting the discharge request signal may be adjusted so that t4 is equal to the predetermined time interval.

Then, in order to avoid troubles such as biting of the packaged objects X... X into the horizontal seal portion and to perform high-speed operation,
If data on what time interval t4 vibration is detected is collected in advance at the time of adjustment of the apparatus, the time interval t1 or the timing of transmitting the discharge request signal can be set based on the data. Member 33,
34 can perform an appropriate operation.

Further, during operation of the bag making and packaging machine 1, the control unit 51 collects a vibration detection signal from the vibration sensor 50, and calculates a predetermined time t 4 and a time t 4 actually measured by the vibration sensor 50. The presence or absence of the difference is checked, and the operation start timing of the next and subsequent seal members 33 and 34 can be set based on the result.

[0054]

As described above in detail with reference to the specific examples, according to the first aspect of the present invention, the vibration detecting means for detecting the vibration is provided at the portion where the vibration accompanying the insertion of the packaged object is propagated. Therefore, the fall of the article to be packaged can be detected irrespective of the translucency of the chute, and the cleaning of the inner surface of the chute for accurate detection of the article to be packaged becomes unnecessary.

Then, the appropriate operation start timing of the horizontal sealing device is set based on the vibration detection signal from the vibration detecting means. The horizontal seal can be terminated before the sheet passes through and falls into the packaging material. Therefore, the article to be packaged can be accommodated without being caught in the horizontal seal portion.

Further, since the vibration detecting means is provided at a portion where the vibration propagates, the degree of freedom of the mounting position is increased. For example, even if it is provided at a position distant from the horizontal sealing device such as the upper portion of the chute, the vibration of the lower portion of the chute located immediately above the horizontal sealing device can be accurately detected from the propagation of the vibration. Therefore, the operation start timing of the horizontal sealing device can be set with high accuracy while minimizing the time margin, so that high-speed operation can be performed. Then, the problem in the installation space is eliminated.

According to the second aspect of the present invention, since the vibration detecting means is provided in the collecting chute or the cylindrical chute of the combination weighing machine, it is possible to reduce noise at the time of propagation. Therefore, it becomes possible to detect the propagation of vibration due to the insertion of the packaged object with higher accuracy.

According to the third invention, in the first invention or the second invention, the vibration detection signal is sampled during the operation, and the time is measured from the reference time during the packaging operation to the input time of the vibration detection signal. Based on the operation, automatic operation timing setting means for automatically adjusting the operation start timing of the horizontal sealing device at the time of the next and subsequent packaging operations is provided, so that the falling state of the packaged object changes during the operation of the bag making and packaging machine. In this case, it is possible to detect a difference between the state in this case and the initial setting, and newly set an appropriate operation timing of the horizontal sealing device. Therefore, troubles such as the bite of the packaged object in the seal portion can be further avoided, and the trouble of manual adjustment is not required.

[Brief description of the drawings]

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

FIG. 2 is an explanatory diagram of a packaging state of an article to be packaged at a lower portion of a chute by an air line in FIG. 1;

FIG. 3 is a view showing a schematic structure of a seal member.

FIG. 4 is a configuration diagram of a control system in the bag making and packaging machine.

FIG. 5 is a time chart showing an example of an operation in the bag making and packaging machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bag-making and packaging machine 6 Horizontal sealing device 13 Chute 14 Upper chute 15 Lower chute 50 Vibration sensor 51 Control unit F Packaging material X Packaged material

 ──────────────────────────────────────────────────の Continued on the front page F term (reference) 3E050 AB02 BA04 BA11 CA02 CA08 CB03 DC02 DC09 DD03 DF01 DF09 FA01 FB01 FB07 GB06 GB09 HA01 HA03 HB06

Claims (3)

[Claims] 1. A tubular chute into which an article to be packaged is charged,
A horizontal sealing device that is disposed below the chute and sandwiches a tubular packaging material that hangs down around the chute and seals in a horizontal direction. A vibration detecting means for detecting the vibration at a portion where the vibration accompanying the vibration is propagated, and a setting means for setting an operation start timing of the horizontal sealing device based on a vibration detection signal from the vibration detecting means A vertical bag making and packaging machine characterized by comprising: 2. A collective chute of a combination weighing machine is disposed above the cylindrical chute, and the vibration detecting means includes:
The vertical bag making and packaging machine according to claim 1, wherein the vertical bag making and packaging machine is provided on a cylindrical chute or a collecting chute of a combination weighing machine. 3. A setting means for automatically adjusting the operation start timing of the horizontal sealing device in the next and subsequent packaging operations based on the time from the reference time during the packaging operation to the input time of the vibration detection signal. 3. The method according to claim 1, further comprising adjusting means.
The vertical bag making and packaging machine according to 1.