JP5684459B2 - Trim discharge device and trim discharge method - Google Patents

Description

  The present invention relates to a sheet roll trim discharge device and a sheet roll trim detection method.

Sheet rolls, such as toilet rolls and kitchen rolls, in which strip-shaped continuous paper, continuous nonwoven fabric sheets and the like are wound in a cylindrical shape are well known.
This type of sheet roll is manufactured by first producing a long roll, also called a log having a predetermined width of the product width + α, and cutting this into a product width as appropriate.
For example, the products after cutting the log are continuously conveyed by a conveyance line such as an appropriate conveyer with the end face thereof in the traveling direction, and thereafter, an appropriate number is packaged and distributed in the market.
In such a sheet roll production line, an excess portion of + α at the end of the log, which is also called a trim generated in the log cutting process, is narrower than the product width and is discharged from the production line immediately after cutting. Yes.

However, in this way, in the production line, the trim does not flow to the subsequent conveying means after cutting, but may flow from the cutting line to the subsequent conveying line for some reason.
In the case where the trim flows to the subsequent conveyance line, the sheet roll conveyance device is provided with a device for detecting the trim and removing it from the conveyance line so that the trim is not wrapped and distributed in the market. .

In general, this apparatus uses the fact that the width of the trim is narrower than the product width, so that it is difficult to stand on a conveyor line such as a conveyor with the peripheral surface as the bottom. Thus, for example, a sensor or the like is used to detect whether articles sequentially flowing through the conveyance line match the product width, and those that do not match the product width are discharged from the line.
In other words, when trim is mixed on the transport line, the trim falls during the transport process and its end face faces upward, and therefore a width (diameter) different from the product width is detected by the sensor for the trim. When something different from the product width is detected by the sensor, it is judged as a trim and excluded from the conveying line. In addition, as a specific exclusion mechanism, a mechanism that generally injects compressed air and blows the trim away from the conveyance line is often used.

However, in recent years, sheet rolls such as toilet paper are compact and do not take up installation space, and can be made inexpensive. Therefore, they are distributed in the market for compact products with a small width and a small difference between the product width and the roll diameter. It has become like this.
For this reason, in the conventional trim discharge device, it is difficult to distinguish between the trim and the product, and there is an increased risk that the trim will not be discharged on the transport line.

JP2008-189460 JP 09-086645 A

  Therefore, the main problem of the present invention is that in a sheet roll production line where the difference between the product width and the roll diameter is small, the trim that has flowed into the conveyance line after log cutting is surely discharged from the conveyance line so that it is not distributed to the market. Is to make it.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
A trim discharge device capable of removing a trim that is mixed in a conveyance path having a conveyance surface that continuously conveys sheet rolls and is conveyed while falling on the conveyance surface such that an end surface is on the upper side,
A first detecting means for detecting the length of an article conveyed on the conveying surface from above the conveyed article, and the article conveyed on the conveying surface having a predetermined height Second detection means for detecting whether or not it is from the side of the article being conveyed,
When it is detected that the conveyance direction length of the article detected by the first detection means is different from the predetermined range and that the article detected by the second detection means does not have the predetermined height. And a trim discharging device that operates based on the detection signal and excludes articles from the conveying surface.

<Invention of Claim 2>
2. The trim discharging apparatus according to claim 1, wherein the removing means blows an article moving on the conveying surface to the outside of the conveying surface by blowing a compressed gas to the article moving on the conveying surface.

<Invention of Claim 3>
The trim discharging apparatus according to claim 1 or 2, wherein at least one of the first detection means and the second detection means is detection means using a phototube.

<Invention of Claim 4>
Trims mixed in a conveyance path having a conveyance surface that conveys sheet rolls continuously and fallen over the conveyance surface so that the end surface is on the upper side are removed in the process of conveying sheet rolls continuously. A trim discharge method that enables
For articles that are placed on a transport surface that moves in a certain direction and moves continuously,
Sequentially detecting the length of the article in the conveyance direction by first detection means for detecting from above the article to be conveyed,
And detecting by a second detection means for detecting from the side of the article to be conveyed whether or not the height of the moving article from the conveying surface is a predetermined height or more,
When it is detected by the first detection means that the length is other than a predetermined range, and when the second detection means does not want to detect a predetermined height At least at any time,
A trim discharging method, wherein an article for detection or non-detection is excluded from a conveying surface by an exclusion means.

<Invention of Claim 5>
The trim discharging method according to claim 4, wherein the removing means blows the article moving on the conveying surface to the outside of the conveying surface by blowing a compressed gas to the article moving on the conveying surface.

<Invention of Claim 6>
6. The trim discharging method according to claim 4, wherein at least one of the first detection unit and the second detection unit is a detection unit using a photoelectric tube.

  As described above, according to the present invention, in the sheet roll manufacturing line with a small difference between the product width and the roll diameter, it is possible to reliably discharge the trim that has flowed out to the conveyance line after log cutting from the conveyance line.

It is a schematic perspective view of the trim discharge device of the present invention. It is explanatory drawing of the log and trim of this invention. It is explanatory drawing of the 1st detection means of this invention. It is explanatory drawing of the 2nd detection means of this invention.

Next, embodiments of the present invention will be described in detail below with reference to the drawings.
FIG. 1 is a schematic perspective view showing a trim discharge device X1 according to the present invention. FIG. 2 is an explanatory diagram of the log R and the trim T. FIG. 3 is an explanatory diagram of the first detecting means 1 according to the present invention. FIG. 4 is an explanatory diagram of the second detection means 2 according to the present invention.

The discharge device X1 according to the present invention has a trim T that has flowed erroneously from the preceding log cutting step in the conveyance line that conveys the sheet roll 5 in which the continuous sheets are wound in a cylindrical shape in a cylindrical shape with the end surface 5e directed in the traveling direction. Is discharged from the transfer line and removed.
The target sheet roll 5 is, for example, a toilet roll, a kitchen roll, or the like in which a continuous sanitary thin paper, a continuous nonwoven fabric sheet, or the like is wound in a cylindrical shape.

  Here, the log R and the trim T will be described. As shown in FIG. 2, the log R is an original sheet having a width that is a multiple of the width of the sheet roll 5 + α in the process of manufacturing the sheet roll 5. The sheet drawn out from the original roll that has been wound up is wound up to a predetermined winding length of the sheet roll 5. By cutting this log R into sheet roll widths, individual sheet rolls 5 are obtained. Then, both end portions of the log R become surplus portions when cut because the end surfaces do not become a clean flat surface due to the winding process, and do not become the sheet roll 5 as a product. A surplus portion formed at the time of cutting is a portion called a trim T.

  The trim T is normally discharged from the production line after log cutting, but may be accidentally discharged to the subsequent conveyance line. As described in the background art section, when the trim T flows out to the conveyance line, the width Lt of the trim T is extremely narrow compared with the width 5t of the sheet roll 5, and therefore the trim T is on the conveyance surface. Then, the sheet is conveyed in a state of being tilted so that the end surface Te is on the upper side. The trim diameter Tt and the sheet roll diameter 5r are basically the same.

  The present invention is an apparatus for discharging the trim T in a transport line (transport process). In particular, this is effective in a production line for producing a product in which the width 5t and the diameter 5r of the sheet roll 5 are approximate values. Specifically, the difference between the sheet roll width 5t and the diameter 5r may be 0 mm. In the present invention, if the trim width and the sheet roll diameter are 5 mm or more, the effect is sufficiently exhibited.

  The trim discharge device X1 of the present invention includes a transport surface 3 that moves in a certain direction. A pair of guide rods, guide plates and the like for guiding the peripheral surface of the sheet roll 5 can be appropriately provided on the transport surface.

  The moving conveyance surface 3 can be configured using, for example, a belt conveyor, a roll conveyor, or the like. Preferably, it is preferable to use a belt conveyor that has a high flatness of a conveyance target object stacking surface serving as the conveyance surface 3 and is difficult to deform the sheet roll 5 during conveyance. The illustrated example employs a belt conveyor that is configured by bridging an endless belt 32 between a drive roll 30 and a rotatable roll 31 in order to form a conveyance surface. In the illustrated example, the transport surface 3 is a flat surface and does not necessarily have to be a flat surface. For example, it may be an upwardly open curved surface into which a sheet roll fits.

  Thus, when using a belt conveyor, the endless belt which comprises the conveyance target object loading surface used as the conveyance surface 3 is suitable for resin-made things, such as rubber. If it is made of rubber, appropriate friction is generated between the sheet roll and the conveying surface, and the sheet roll 5 can be reliably conveyed without slipping.

  As the drive source for moving the transport surface 3, for example, a drive motor or the like can be adopted as long as it is a belt conveyor, a roller conveyor or the like, and these can be adopted according to a known technique. The present invention is not particularly limited.

  As the moving speed of the conveying surface 3, the conveying speed employed in a known sheet roll production line or the like can be employed as it is. Specific examples include 50 to 500 m / min, preferably about 100 to 350 m / min for a toilet roll production line, and 50 to 500 m / min, preferably 100 for a kitchen roll production line. About 350 m / min.

  On the other hand, the trim discharge device X1 of the present invention is a first detection unit that detects the length in the conveyance direction of an article (such as a sheet roll and a trim) conveyed on the conveyance surface at an appropriate position on the conveyance surface 3. 1 and second detection means 2 for detecting the height of an article conveyed on the conveyance surface.

  As can be understood from FIG. 3, the first detection unit 1 includes, for example, two irradiation units 10 that emit sensor light 1 s (two in the illustrated example), or three or more irradiation units 10 above the conveyance surface 3. When an article passing through the sensor light 1s, 1s passes through the sensor light 1s on the upstream side, this is detected and then passed under the sensor light on the downstream side. What is necessary is just to comprise so that this may be detected and the length along the conveyance direction of the said article | item may be calculated by the time in the meantime, the moving speed of the conveyance surface 3, etc. In this way, whether or not the article placed on the transport surface 3 and moved by the first detection means 1 is a sheet roll 5 having a predetermined width or not. Can be judged. Here, since the trim T is narrow, it is difficult to stand by the moving conveyance surface 3 with the end surface in the traveling direction, and the trim T moves on the conveyance surface in a collapsed state (with the end surface facing upward). Therefore, when the length along the conveyance direction detected by the first detection unit 1 is shorter than that of the sheet roll 5, it can be determined that the trim is T.

  The first detection means 1 is preferable because, for example, a photoelectric tube that emits sensor light 1s is simple, but other known non-contact sensors such as a device that uses infrared rays instead. Technology can be used.

  On the other hand, as shown in FIG. 4 in particular, the second detection means 2 irradiates, for example, one sensor light 2s from the side of the transport surface 3 to the appropriate height position from the bottom surface of the transport surface. The irradiation unit 20 is installed to detect whether or not the article placed and moved on the transport surface 3 has a height that passes through the position of the sensor light 2s.

  With respect to the height position at which the sensor light 2s is irradiated, for example, if there is one irradiation unit 20, the height when the sheet roll 5 is placed on the conveying surface 3 with the end surface as the traveling direction, that is, normal. The position is slightly lower than the diameter of the product sheet roll.

  In this case, in the state where the trim T falls on the conveying surface, the height is lower than the (width) height of the normal sheet roll 5, and thus the sensor T is not detected by the sensor light 2 s from the irradiation unit 20. If it is not detected by the light 2s, it can be determined that the trim T has passed.

  In a more preferable example, two or more irradiation units 20H and 20L are installed apart from each other in the height direction (two in the illustrated example) as in the illustrated example, and the sensor light 2s from the one irradiation unit 20L is trimmed. It is possible to detect the passage of the trim T using a position lower than the height position when T falls on the conveying surface as a detection position, and the sheet roll 5 conveys the at least one irradiation unit 20H above it. The height when the end surface is placed on the surface as the traveling direction, that is, a position slightly lower than the diameter of the normal sheet roll 5 is set as a detection position.

  In this way, as can be understood from FIGS. 4A and 4B in particular, it can be determined that the normal product has passed by being detected by the two sensor lights 2s, and one, particularly the lower irradiation. When only the sensor light from the section 20L can be detected, it can be determined that the article is an abnormal article including at least the trim T, so that the detection of the trim T mixed in the transport line is ensured.

  The second detection means 2 is preferably one using a phototube as in the first detection means 1, but one using an appropriate non-contact type sensor such as one using infrared rays can be exemplified.

  Here, in the present invention, it is most preferable that both the first detection means 1 and the second detection means 2 are provided. In this way, it is possible to reliably detect the trim even in the production line, although the width 5t and the diameter 5r of the sheet roll 5 are similar.

  On the other hand, the exclusion means 4 is located downstream of the detection means 1 and 2, preferably immediately after, and is other than a normal sheet roll based on the detection signal detected by the detection means 1 and 2. When it is determined, the determination target is discharged from the conveying surface to the outside of the conveying surface.

  It should be noted that each means 1, about the width 5t of the sheet roll 5 detected by the first detection means 1 and whether or not the article detected by the second detection means 2 has a predetermined height. A specific control device 60 that receives a signal from 2 and calculates a predetermined calculation value, or commands the exclusion means to the exclusion means at an appropriate timing based on these signals, is a control using a known computer According to the technology, each signal is exemplified as S1 to S5 in the figure. In the present invention, such a calculation and signal transmission system is not limited.

  The discharging mechanism of the exclusion means 4 is not particularly limited as long as the articles flowing sequentially and continuously on the conveying surface 3 can be discharged individually. For example, a compressed gas injection device in which the blowing nozzle 3 is installed so as to face the conveying surface 3 from the side as shown in the drawing can be employed. What is necessary is just to comprise so that the compressed air A may be sprayed from the side and it may blow off the conveyance path | route with respect to the goods which move on a conveyance surface according to the signal from each detection means 1 and 2. In addition, a push-out mechanism using a push rod, a mechanism that changes the conveyance direction of the specific sheet roll by moving the path change plate on the conveyance path, a mechanism that discharges the sheet to the outside of the conveyance path, a suction unit, and the like can be employed.

  As can be understood from the above description, according to the trim discharge device X1 of the present invention, the trim T can be reliably removed from the transport line, and it is reliably prevented from being distributed as a product.

  DESCRIPTION OF SYMBOLS 1 ... 1st detection means, 10 ... Irradiation part of 1st detection means, 10s ... Sensor light, 2 ... 2nd detection means, Irradiation part of 2nd detection means, 20s ... Sensor light, 3 ... Conveyance surface , 30 ... Driving roll, 31 ... Rotating roll, 32 ... Endless belt, 4 ... Exclusion means, 5 ... Sheet roll, 5e ... Sheet roll end face, 5t ... Sheet roll width, 5r ... Sheet roll diameter, 60 ... Control Device: A ... Compressed air, X1 ... Trim discharge device, R ... Log, T ... Trim, Lt ... Trim width, 60 ... Control device.

Claims (6)

A trim discharge device capable of removing a trim that is mixed in a conveyance path having a conveyance surface that continuously conveys sheet rolls and is conveyed while falling on the conveyance surface such that an end surface is on the upper side,
A first detecting means for detecting the length of an article conveyed on the conveying surface from above the conveyed article, and the article conveyed on the conveying surface having a predetermined height Second detection means for detecting whether or not it is from the side of the article being conveyed,
When it is detected that the conveyance direction length of the article detected by the first detection means is different from the predetermined range and that the article detected by the second detection means does not have the predetermined height. And a trim discharging device that operates based on the detection signal and excludes articles from the conveying surface.   2. The trim discharging apparatus according to claim 1, wherein the removing means blows an article moving on the conveying surface to the outside of the conveying surface by blowing a compressed gas to the article moving on the conveying surface.   The trim discharging apparatus according to claim 1 or 2, wherein at least one of the first detection means and the second detection means is detection means using a phototube. Trims mixed in a conveyance path having a conveyance surface that conveys sheet rolls continuously and fallen over the conveyance surface so that the end surface is on the upper side are removed in the process of conveying sheet rolls continuously. A trim discharge method that enables
For articles that are placed on a transport surface that moves in a certain direction and moves continuously,
Sequentially detecting the length of the article in the conveyance direction by first detection means for detecting from above the article to be conveyed,
And detecting by a second detection means for detecting from the side of the article to be conveyed whether or not the height of the moving article from the conveying surface is a predetermined height or more,
When it is detected by the first detection means that the length is other than a predetermined range, and when the second detection means does not want to detect a predetermined height At least at any time,
A trim discharging method, wherein an article for detection or non-detection is excluded from a conveying surface by an exclusion means.   The trim discharging method according to claim 4, wherein the removing means blows the article moving on the conveying surface to the outside of the conveying surface by blowing a compressed gas to the article moving on the conveying surface.   6. The trim discharging method according to claim 4, wherein at least one of the first detection unit and the second detection unit is a detection unit using a photoelectric tube.

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