KR20090126567A - Edge banding machine - Google Patents

Abstract

PURPOSE: An edge bending machine is provided to prevent edge bands attached to both ends of a panel from being removed when cutting the panel by a cutting device having a rotary saw. CONSTITUTION: A panel moving device(100) has a conveyor(120) and a plurality of transfer rollers(140). A panel cutting device(200) has a rotary saw(210). The rotary saw uniformly cuts the edge surface of a panel(P) without unevenness. An edge band cutting device(500) cuts both ends of an edge band(B) suitably to the length of the panel. The rotary saw of the panel cutting device is rotated based on the front side in a counterclockwise direction. When the edge surface shear of the panel is cut, the center of rotation of the rotary saw is positioned beneath the lower end of the panel.

Description

EDGE BANDING MACHINE {EDGE BANDING MACHINE}

The present invention prevents the occurrence of defects in the panel product by preventing the edge bands attached to both ends of the panel is not peeled off when the panel is cut by the cutting device equipped with a rotary saw that can easily cut the panel in the form of thick plywood An edge banding machine that can be.

Generally, wood or man-made wood, so-called MDF (Middle Density Fiber) panel, which is used for office furniture, home furniture or sink furniture, is widely used as a furniture material. Such a panel is thermally transferred by transferring the transfer paper printed with various colors and patterns such as a wooden pattern on the upper and lower surfaces, but the surface of the edge (edge, edge) is exposed as it is, so the appearance is not good.

In order to finish the decorative border of the panel as described above, the edge band of the finishing treatment, such as PP, PVC, veneer, pattern paper, etc. are attached to the edge surface of the panel with an adhesive. As such, an edge banding machine is a device that transfers and attaches an edge band to an edge surface of a panel and cuts and trims the edge band according to the length and thickness of the panel.

1 is a front view illustrating a configuration of an edge banding machine provided with a panel cutting apparatus having a conventional rotary saw, and FIG. 2 is a diagram illustrating a cutting process of a panel when the rotary saw rotates clockwise according to the embodiment of FIG. 1. 3 is a block diagram illustrating a cutting process of a panel when the rotary saw according to the embodiment of FIG. 1 rotates in a counterclockwise direction, and FIG. 4 is cut by the rotary saw according to the embodiments of FIGS. 2 and 3. It is a perspective view showing the state of the panel.

1 to 3, the conventional edge banding machine (1), a plurality of feed rollers that are rotatably installed on the conveyor 12 and the conveyor 12 to move in an endless track (P) A panel cutting device 20 equipped with a panel conveying device 10 provided with 14), a rotary saw 25 for uniformly cutting the edge surface of the panel P to be conveyed without irregularities, and the cut panel An edge band supply device (30) for supplying the edge band (B) to the edge surface of (P) and an adhesive is applied to the edge surface of the panel (P), and the edge band (from the edge band supply device 30) The edge band attachment device 40 which transfers B) and press-bonds to the edge surface of the panel P, and the both ends of the edge band B attached to the edge surface of the panel P, The edge band cutting device 50 which cuts to length, and the edge band B attached to the said panel P are matched with the thickness of the panel P. It consists of the trimming of the protruding edge band edge trimming device 60, the buffing apparatus (not shown) for removing an adhesive adhered to the peripheral edge of a panel (P) passing through the band-edge trimming device (60).

The panel cutting device 20 of the conventional edge banding machine 1 has a rotary saw 25 which is rotated by a rotating motor (not shown) as shown in FIGS. 2 and 3. Cutting to be uniform without irregularities on the edge surface of the panel (P) to be transported by. The rotary saw 25 of the panel cutting device 20 may slide back and forth with respect to the front surface, and may be installed to be elevated up and down. In addition, a plurality of rotary saws 25 may be provided, and the plurality of rotary saws 25 may be arranged stepwise, or may be arranged forward and backward with respect to the front surface. However, the rotary saw 25 of the panel cutting device 20 constituting the conventional edge banding machine 1 is cut while maintaining a constant height from the front end to the rear end of the panel P when cutting the panel P to be transferred. Will be That is, although the center of rotation G of the rotary saw 25 is not shown in the figure, it is located at the middle point of the height of the edge surface of the panel P, or as shown in FIGS. 2 and 3, the lower end of the panel P. It may be located below or above the top of the panel (P).

When the panel P is cut by the rotary saw 25 positioned as described above, there is no problem when the edge band B is not attached to both ends of the panel P, but as shown in FIG. When the edge band (B) is attached, there is a problem that the edge band (B) is separated from both ends of the panel (P) by the rotary saw 25 to cause a failure. That is, the edge banding machine 1 equipped with the panel cutting device 20 uniformly cuts one side of the panel P without irregularities, and then attaches the edge band B non-stop to process the total slope by one surface. do. Therefore, after cutting one surface of the panel (P) and attaching the edge band (B), and then cutting the one surface and then attaching the edge band (B) to process the total slope to complete the panel product. Therefore, after machining one or more of the back surface or more, when machining is started on the other surface, the cutting process is started with the edge band B attached to the front or rear ends or front and rear ends of the panel P.

Considering the processing conditions as described above, if both edge bands B and B 'are attached to the front and rear ends of the panel P, the rotary saw 25 is counterclockwise as shown in FIG. When the rotation center (G) of the rotary saw 25 is located below the lower end of the panel (P), when the shear of the panel (P) is cut, the rotary saw (in the direction in which the edge band (B) is attached) Cutting force is provided by the rotation of 25 so that the edge band B does not fall from the front end of the panel P. FIG. However, the panel P is conveyed along the conveying direction to provide cutting force by the rotation of the rotary saw 25 in the direction opposite to the direction in which the edge band B 'at the rear end of the panel P is attached. As shown, the edge band B 'is separated from the rear end of the panel P, so that a defect occurs. Although not shown in the drawing, when the rotary saw 25 rotates counterclockwise, and the rotation center G is positioned above the top of the panel P, the edge band (from the front end of the panel P) is reversed. B) falls and a defect occurs.

In addition, as shown in FIG. 3, when the rotary saw 25 rotates in a clockwise direction, and the rotation center G of the rotary saw 25 is positioned above the upper end of the panel P, as shown in FIG. 4. As described above, the edge band B 'is dropped from the rear end of the panel P, and defects occur. Although not shown, the rotation center G of the rotary saw 25 is located below the bottom of the panel P. In this case, the edge band B is dropped from the front end of the panel P, and a defect occurs. In particular, the failure rate of the panel product as described above is a problem that occurs in the deeper panel made of thick plywood (for example, 5 to 8 cm).

As described above, the panel cutting device forming the conventional edge banding machine, by cutting the panel transported while the rotary saw maintains a constant height, the attached state of the edge band attached to the front or rear end of the panel is released to the edge from the panel When the band is separated, there is a problem that the defect is generated by lowering the completeness of the panel product, in particular, such a problem is further exacerbated in the thick plywood panel.

An object of the present invention devised to solve the above problems, an edge band attached to both ends of the panel when cutting the panel by a cutting device equipped with a rotary saw that can easily cut the panel in the form of thick plywood It is to provide an edge banding machine that can prevent the occurrence of defects of the panel product by preventing the peeling off.

Other objects, specific advantages and novel features of the invention will become more apparent from the following detailed description and preferred embodiments in conjunction with the accompanying drawings.

In order to achieve the above object, the edge banding machine according to the first embodiment of the present invention, a panel conveying apparatus is provided with a conveyor moving in an orbital manner and a plurality of feed rollers rotatably installed on the conveyor, the panel is transported; A panel cutting device equipped with a rotary saw for uniformly cutting the edge surface of the panel to be transported without irregularities, an edge band supply device for supplying an edge band to the edge surface of the cut panel, and an edge surface of the panel An edge band attachment device for applying an adhesive and pressing the edge band to the edge surface of the panel, and an edge band cutting device for cutting both ends of the edge band attached to the edge surface of the panel to the length of the panel; Edge band trimming device for trimming the upper and lower edges of the edge band attached to the panel in accordance with the thickness of the panel, and In the edge banding machine comprising a buffing device for removing the adhesive around the edge of the panel passing through the edge band trimming device, the rotary saw of the panel cutting device is rotated in a counterclockwise direction with respect to the front, the transfer is The center of rotation when cutting the front edge of the panel is located below the bottom of the panel, when the rear edge of the panel is characterized in that the center of rotation is installed so as to be positioned above the top of the panel.

On the other hand, the edge banding machine according to the second embodiment of the present invention, a panel conveying apparatus is installed on a conveyor moving in an endless track and a plurality of rollers rotatably installed on the conveyor and the panel is transported, A panel cutting device having a rotary saw for uniformly cutting the edge surface without irregularities, an edge band supply device for supplying an edge band to the edge surface of the cut panel, an adhesive applied to the edge surface of the panel, An edge band attachment device for pressing and attaching the edge band to the edge surface of the panel, an edge band cutting device for cutting both ends of the edge band attached to the edge surface of the panel to the length of the panel, and attaching to the panel An edge band trimming device for trimming the edges protruding up and down according to the thickness of the panel and the edge band trimming device In the edge banding machine including a buffing device for removing the adhesive around the edge of the panel passed, the rotary saw of the panel cutting device is rotated in a clockwise direction with respect to the front, but the edge edge of the panel conveyed The center of rotation is located above the top of the panel when cutting, it is characterized in that it is installed so as to be lifted so that the center of rotation is located below the bottom of the panel when cutting the rear edge of the panel.

Further, in the edge banding machines of the first and second embodiments according to the present invention, the panel cutting device includes a rotary motor for rotating the rotary saw, an elevating unit for elevating the rotary motor, and a front end of the panel to be conveyed. And a first proximity sensor detecting whether each of the rear stages is close, and further comprising a controller configured to drive the rotary motor and the lift unit by receiving a signal from the first proximity sensor.

The apparatus may further include a vacuum suction device installed between the panel cutting device and the edge band attachment device to suction and remove the sawdust generated around the edge surface of the panel cut by the panel cutting device by vacuum.

The vacuum suction device may further include a second proximity sensor configured to detect whether each of the front and rear ends of the panel to be transferred is close, and the controller receives the signal from the second proximity sensor to turn on the vacuum suction device. It is characterized by turning off.

Edge banding machine according to the present invention, the edge surface of the panel by the rotary saw is variably lifted up and down so that the rotation center at the front and rear ends of the panel to be transported, respectively located above the top of the panel or below the bottom of the panel. By cutting, the edge band attached to the front end or the rear end of the panel does not fall, thereby improving the completeness of the panel product to prevent the occurrence of defects.

In addition, the sawdust generated around the edge of the panel cut by the rotary saw of the cutting device by suction suction removal through the vacuum suction device can be easily attached to the edge band of the edge of the panel.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the edge banding machine according to the present invention.

5 is a front view showing the configuration of the edge banding machine according to the first embodiment of the present invention, Figure 6 is a plan view of the main portion showing a panel cutting device and a vacuum suction device of the embodiment of Figure 5, Figure 7 is a 8 is a block diagram illustrating a cutting process of a panel according to an embodiment of the present invention. FIG. 8 is a front view illustrating a configuration of an edge banding machine according to a second embodiment of the present invention, and FIG. 9 is according to the embodiment of FIG. 8. It is a block diagram which shows the cutting process of a panel from the front.

Edge banding machine 1 of the present invention, as shown in Figure 5 to 9, the panel transfer device 100, panel cutting device 200, edge band supply device 300, edge band attachment device 400, Edge band cutting device 500, edge band trimming device 600 and buffing device (not shown) is made, and further includes a vacuum suction device 700 and a controller (C, controller). In addition, the panel cutting device 200 may include a rotary saw 210, a rotary motor 220, the lifting unit 230 and the first proximity sensor 240, the vacuum suction device 700 It may include a second proximity sensor 740.

As shown in FIGS. 5, 6, and 8, the panel conveying apparatus 100 is rotatably installed on a conveyor 120 moving in an endless track, and a plurality of conveying panels on which the panel P is conveyed. The roller 140 is installed. The panel P transported by the panel transport device 100 excludes a case in which the edge surfaces of the four surfaces are transported by the panel cutting device installed separately. That is, the edge banding machine of the present invention non-stop attaching the edge band (B) to the edge surface of the panel (P) while cutting the panel (P) by the panel cutting device (200) connected to the panel feeder (100) To complete the panel product. Therefore, the panel P conveyed by the panel conveying apparatus 100 constituting the edge banding machine of the present invention is an uneven state in which the edge surface is uneven. Therefore, the panel cutting device 200 is installed to be connected to the panel conveying apparatus 100 to uniformly cut the edge surface of the panel P without irregularities. Accordingly, by attaching the edge band (B) to the edge surface of the panel (P) it can significantly reduce the process for completing the panel product.

The panel cutting device 200 is provided with a rotary saw 210 which cuts uniformly on the edge surface of the panel P to be transported without irregularities.

The rotary saw 210 is rotated in a counterclockwise direction with respect to the front side according to the first embodiment of the present invention shown in Figures 5 and 7, the center of rotation when cutting the front end of the panel (P) to be transported (G) is positioned below the lower end of the panel (P), and is installed so that the center of rotation (G) is located above the upper end of the panel (P) when cutting the rear edge of the panel (P). .

In addition, the rotary saw 210 according to the second embodiment of the present invention shown in Figures 8 and 9, rotates in the clockwise direction with respect to the front surface while rotating the cutting edge of the panel (P) to be transported The center G is positioned above the upper end of the panel P, and is installed to be liftable so that the center of rotation is located below the lower end of the panel P when cutting the rear end of the edge surface of the panel P.

That is, the characteristic of the present invention is that the edge band B attached to the front and rear ends of the panel P when the panel P is cut by the rotary saw 210 of the panel cutting device 200 has the rotary saw 210. The cutting direction provided by the rotational force of acts in the attachment direction of the edge bands B attached to the front and rear ends of the panel P so that the edge band B does not fall from the panel P. Therefore, the rotary saw 210 is raised and lowered at the cutting of the front and rear ends of the panel P, which is conveyed according to the rotation direction of the rotary saw 210, that is, counterclockwise or clockwise, and is always driven by the rotary force of the rotary saw 210. It is controlled to operate according to the first and second embodiments of FIGS. 7 and 9 so that the cutting direction is directed to the attachment direction of the edge bands B attached to the front and rear ends of the panel P. FIG.

Looking at the operation of the rotary saw 210 according to the first embodiment of Figure 7, the rotary saw 210 is rotated in the counterclockwise direction when cutting the front end of the conveying panel (P) rotary saw 210 The center of rotation (G) of must be located above the top of the panel (P). Accordingly, the cutting direction due to the rotational force of the rotary saw 210 is directed to the attachment direction of the edge band (B, B ') attached to the front end of the panel (P). In this case, if the rotary saw 210 rotates in the clockwise direction, cutting by the rotational force of the rotary saw 210 in a direction opposite to the attachment direction of the edge band (B) attached to the front end of the panel (P) The direction is formed so that the edge band (B) is separated from the front end of the panel (P) causes a failure of the panel product. On the other hand, when the edge band (B) attached to the front end of the panel P is cut by the rotary saw 210, the rotary saw 210 is raised to rotate the center of rotation (G) of the rotary saw 210 to the panel ( It is located below the bottom of P). That is, when the panel P is continuously transferred so that the rotary saw 210 cuts the edge band B 'attached to the rear end of the panel P, the rotary saw 210 continues to rotate counterclockwise. Since the cutting direction due to the rotational force of the rotary saw 210 is directed to the attachment direction of the edge band (B ') attached to the rear end of the panel (P). In this case, if the rotary saw 210 rotates in the clockwise direction, the cutting direction is formed in a direction opposite to that of the edge band B 'attached to the rear end of the panel P, so that the edge band B' is formed in the panel ( Will be separated from the end of P).

Looking at the operation process of the rotary saw 210 according to the second embodiment of Figure 9, the rotary saw 210 is rotated in the clockwise direction when cutting the front of the panel (P) to be transferred to rotate the rotary saw 210 The center G should be located below the bottom of the panel P. Accordingly, the cutting direction due to the rotational force of the rotary saw 210 coincides toward the attachment direction of the edge band B attached to the front end of the panel P. In addition, after cutting the front end of the panel (P) to lower the rotary saw 210 so that the rotation center of the rotary saw 210 is located above the top of the panel (P). Accordingly, the cutting direction of the edge band B 'attached to the rear end of the panel P coincides with the cutting direction of the rotary saw 210.

5, 6 and 8, the panel cutting device 200, a rotary motor 220 for rotating the rotary saw 210, a lifting unit 230 for elevating the rotary motor 220, It includes a first proximity sensor 240 for detecting the proximity of each of the front and rear ends of the panel (P) to be transferred. The rotary saw 210 is coupled to the rotary shaft of the rotary motor 220 to rotate, and the rotary saw 210 is lifted up and down by elevating the rotary motor 220. Lifting unit 230 is provided to elevate the rotary motor 220, the lifting unit 230 is installed so as to slide up and down by coupling the bracket to the rotary motor 220. Since the rotary motor 220 and the lifting unit 230 can be implemented by a conventional technology, a detailed description thereof will be omitted. The first proximity sensor 240 senses whether each of the front and rear ends of the panel P to be transferred is close, and may use any of a non-contact or contact sensor. Since the first proximity sensor 240 may also be implemented in the related art, a detailed description thereof will be omitted.

The control unit C is provided to control various devices of the edge banding machine 1 of the present invention. In particular, the controller C receives the signal from the first proximity sensor 240 in relation to the control of the panel cutting device 200 and rotates the rotation. The motor 220 and the lifting unit 230 are driven. That is, when the front end of the panel P conveyed from the first proximity sensor 240 is approached and sends a signal to the controller C, the controller C rotates the rotary motor 220 to rotate the rotary saw 210 Cutting the front end of the panel P, cutting the front end of the panel P by cutting the rear end of the panel P by raising or lowering the rotary motor 220 in accordance with the rotation direction of the rotary saw 210. As a result, the edge bands B and B 'attached to the front and rear ends of the panel P are controlled to cut the panel P so that the edge bands B and B' are not separated from the panel P. FIG.

5, 6 and 8, the edge band supply device 300 forming the edge banding machine 1 of the present invention supplies the edge band B to the edge surface of the panel P cut, The edge band attachment device 400 applies an adhesive to the edge surface of the panel P, and attaches the edge band B to the edge surface of the panel P, and the edge band cutting device 500 Both ends of the edge band (B) attached to the edge surface of the panel (P) is cut to match the length of the panel (P). In addition, the edge band trimming device 600 trims the edge protruding up and down according to the thickness of the panel P by the edge band attached to the panel P, and finally, the buffing device (not shown) trims the edge band. Remove any adhesive around the edge of panel P passing through device 600. Since the edge band supply device 300, the edge band attachment device 400, the edge band cutting device 500, the edge band trimming device 600 and the buffing device as described above can be implemented in the prior art, the detailed description thereof will be omitted. .

The sawdust is generated after the panel P is cut by the rotary saw 210 of the panel cutting device 200. The sawdust is present at the edge of the panel P. When the band B is attached, there is a problem that the edge band B is not easily attached to the edge surface of the panel P. In order to prevent such a problem is to install a vacuum suction device 700 to be described later.

5, 6 and 8, the vacuum suction device 700 is installed between the panel cutting device 200 and the edge band attachment device 400 and is cut by the panel cutting device 200. The sawdust generated around the edge of (P) is removed by suction with vacuum. The vacuum suction device 700 may be achieved by connecting a suction pipe to a hopper in which a vacuum suction hole is formed and sucking air. The vacuum suction device 700 as described above may also be achieved using a general vacuum suction method. In this case, the vacuum suction device 700 may include a second proximity sensor 740, and the second proximity sensor 740 detects whether each of the front and rear ends of the panel P being transferred is close to each other. do. That is, the vacuum suction device 700 is turned on and off by detecting the proximity of each of the front and rear ends of the panel P, which is transferred to the vacuum suction device 700. The controller C receives a signal from the second proximity sensor 740 to turn on and off the vacuum suction device for the on / off operation of the vacuum suction device 700. Therefore, after detecting the front end of the panel P transferred to the vacuum suction device 700, the vacuum suction device 700 is turned on, and after detecting the rear end of the panel P, the vacuum suction device 700 is turned off. will be. Of course, the controller C may manually operate the on / off operation of the vacuum suction device 700 to operate the vacuum suction device 700 in the on state or the off state.

The embodiments of the present invention described above and illustrated in the drawings should not be construed as limiting the technical idea of the present invention. The protection scope of the present invention is limited only by the matters set forth in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications will fall within the protection scope of the present invention, as will be apparent to those skilled in the art.

1 is a front view showing the configuration of an edge banding machine equipped with a panel cutting device having a conventional rotary saw,

2 is a block diagram showing a cutting process of the panel when the rotary saw rotates in a clockwise direction according to the embodiment of FIG.

3 is a block diagram showing a cutting process of the panel when the rotary saw rotates in the counterclockwise direction according to the embodiment of FIG.

4 is a perspective view showing a state of the panel cut by the rotary saw according to the embodiment of Figures 2 and 3,

5 is a front view showing the configuration of the edge banding machine according to the first embodiment of the present invention,

FIG. 6 is a plan view illustrating main parts of the panel cutting device and the vacuum suction device in the embodiment of FIG. 5;

7 is a configuration diagram illustrating a cutting process of the panel according to the embodiment of FIG. 5 from the front;

8 is a front view showing the configuration of the edge banding machine according to a second embodiment of the present invention,

9 is a configuration diagram illustrating a cutting process of a panel according to the embodiment of FIG. 8 from the front.

<Explanation of symbols for the main parts of the drawings>

B, B ': edge band

P: Panel

C: control unit

G: center of rotation of the rotary saw

1: edge banding machine

100: panel feeder

120: conveyor 140: feed roller

200: panel cutting device

210: rotary saw 220: rotary motor

230: lifting unit 240: first proximity sensor

300: edge band supply

400: edge band attachment device

500: edge band cutting device

600: edge band trimming device

700: vacuum suction device

740: second proximity sensor

Claims (5)

Conveyor moving in a crawler type and a panel conveying device rotatably installed on the conveyor is provided with a plurality of conveying rollers for conveying the panel, and a rotary saw for cutting uniformly without irregularities on the edge surface of the conveyed panel A panel cutting device, an edge band supply device for supplying an edge band to the cut edge of the panel, and an edge band for applying adhesive to the edge surface of the panel and pressing the edge band to the edge surface of the panel. Trimming the upper and lower edges of the attachment device, the edge band cutting device for cutting both ends of the edge band attached to the edge surface of the panel to the length of the panel, and the edge band attached to the panel to the thickness of the panel The edge band trimming device and the adhesive on the edge of the panel passing through the edge band trimming device. In the edge baendinggi comprising an buffing apparatus, The rotary saw of the panel cutting device, The center of rotation is located below the bottom of the panel when cutting the front edge of the panel to be rotated counterclockwise with respect to the front, and the center of rotation when cutting the rear edge of the panel is above the top of the panel. Edge banding machine is installed so as to be positioned above. A conveyor moving in an orbital manner and a panel conveying apparatus rotatably installed on the conveyor and having a plurality of conveying rollers for conveying the panel, and a rotary saw for uniformly cutting the edge surface of the conveyed panel without irregularities. A panel cutting device, an edge band supply device for supplying an edge band to the cut edge of the panel, an edge for applying adhesive to the edge surface of the panel, and pressing the edge band to the edge surface of the panel A band attaching device, an edge band cutting device for cutting both ends of an edge band attached to the edge surface of the panel according to the length of the panel, and an edge protruding up and down according to the thickness of the panel Trim the edge band trimming device and the adhesive around the edge of the panel passing through the edge band trimming device. In the edge baendinggi comprising an buffing apparatus, The rotary saw of the panel cutting device, The center of rotation is located above the top of the panel when cutting the front edge of the panel, which is rotated clockwise with respect to the front, and the center of rotation is below the bottom of the panel when cutting the rear edge of the panel. Edge banding machine provided in series with a panel cutting device, characterized in that it is installed to be elevated to position. The method according to claim 1 or 2, The panel cutting device, A rotary motor for rotating the rotary saw; An elevating unit for elevating the rotary motor; A first proximity sensor for detecting the proximity of each of the front and rear ends of the panel to be transferred, The controller further comprises a control unit for receiving a signal from the first proximity sensor to drive the rotary motor and the lifting unit. The method according to claim 1 or 2, An edge banding device installed between the panel cutting device and the edge band attachment device, further comprising a vacuum suction device for suctioning and removing the sawdust generated around the edge surface of the panel cut by the panel cutting device with a vacuum; . The method of claim 4, wherein The vacuum suction device, It includes a second proximity sensor for detecting the proximity of each of the front and rear ends of the panel to be transferred, The control unit, Edge receiving band receiving the signal from the second sensor, characterized in that for turning off the vacuum suction device.

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