JP6106988B2 - Transport device - Google Patents

Description

  The present invention relates to a transport device that transports a relatively thin plate glass or the like.

  Conventionally, for transporting a thin plate-shaped workpiece such as a plate glass, an air-floating type transport device that suppresses a contact area when the workpiece is transported is used. For example, when the conveying device is a roller conveyor, both ends of the width direction (hereinafter simply referred to as the width direction) perpendicular to the conveying direction of the workpiece are placed on the rollers facing each other while blowing air on the workpiece and floating. The workpiece is transported by rotating (see Patent Document 1).

  At this time, a suction unit for sucking air is arranged at an inner side in the opposite direction of the roller so that the work does not slide off the roller. The suction unit increases the frictional force between the workpiece and the roller by applying a suction force from below the workpiece.

  Also, it is a type of belt conveyor, and in order to reduce the contact area to the workpiece, a pin (protruding portion) that protrudes from the belt of the conveyor is provided, and only the tip of the pin contacts the workpiece to support the workpiece In addition, so-called pin-up conveyors for conveying are known. In particular, although the pin-up conveyor can reduce the contact area with the workpiece, the frictional force between the workpiece and the tip of the pin becomes weak. Therefore, it is also assumed that the suction unit described in Patent Document 1 is provided inside the opposing direction of the pin-up conveyor.

JP 2008-260591 A

  By the way, depending on the thickness and material of the workpiece, the weight of the workpiece is large, and the inertia force of the workpiece becomes large. Therefore, in the case of the pin-up conveyor described above, the workpiece may slip from the protruding portion during acceleration / deceleration for conveying the workpiece, and the relative position with respect to the belt may shift.

  Therefore, if the suction force of the suction unit is increased, the frictional force between the protruding part and the workpiece can be increased to prevent the workpiece from sliding, but simply increasing the output of a device such as a fan that constitutes the suction unit will result in consumption. Electric power increases unnecessarily.

  An object of the present invention is to provide a transfer device that can increase the frictional force between a workpiece and a protruding portion and stably transfer the workpiece without increasing power consumption.

In order to solve the above-described problems, a conveying device of the present invention includes a plurality of rotating bodies, a belt that has a plurality of protrusions that contact and support the workpiece, and is stretched endlessly by the plurality of rotating bodies and conveys the workpiece. And a plurality of conveying units arranged opposite to each other in parallel with the conveying direction, and an opposing unit arranged on the conveying unit side with respect to the workpiece conveyed by the conveying unit and having an opposing surface facing the workpiece. , an opening portion of at least the edge is formed by opposed portions, of the belt covers at least a side surface and a vertical lower surface, and a cover portion communicating from the opening, reducing the pressure in the cover portion, through the opening, projecting a part near comprising a pressure reducing unit for sucking the opposite side of the gas of the work, and the opposing portion from the side wall of the cover portion, and wherein Rukoto protruding on the opposite side of the opposing direction of the opposing side walls To do.

  The opposing surface may be formed in parallel with the workpiece conveyed by the conveyance unit.

  The opposing surface may be inclined with respect to the horizontal direction along the assumed inclination of the workpiece in which the center side in the opposing direction of the plurality of conveying units bends vertically downward.

  You may further provide the angle adjustment part which adjusts the inclination-angle with respect to the horizontal direction of an opposing surface.

  A gradually increasing portion in which the distance from the workpiece gradually increases as the distance from the opening portion increases may be formed at the end of the facing surface.

Cover may Tsu covered either non conveying portion which moves in the opposite direction of the conveying portion and the conveying direction to move in the transport direction of the belt.

  According to the present invention, without increasing power consumption, the frictional force between the workpiece and the protruding portion can be increased, and the workpiece can be transported stably.

It is explanatory drawing for demonstrating the structure of a conveying apparatus. It is explanatory drawing for demonstrating the structure of a cover part and a pressure reduction part. It is explanatory drawing for demonstrating the suction effect with respect to a workpiece | work. It is explanatory drawing for demonstrating a modification. It is explanatory drawing for demonstrating another modification.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating the understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

  The conveyance apparatus of this embodiment conveys a thin plate-shaped workpiece | work, Here, the conveyance apparatus which conveys a glass plate as a workpiece | work is demonstrated.

  FIG. 1 is an explanatory diagram for explaining the structure of the transport apparatus 100. In particular, FIG. 1A shows a top view of the transport apparatus 100, FIG. 1B shows a front view of the transport apparatus 100, and FIG. 1C shows a side view of the transport apparatus 100. However, in FIG. 1, for convenience of explanation, a cover portion 114 described later is indicated by a broken line, and the length in the transport direction is indicated short.

  The transport apparatus 100 includes a transport unit 110, a floating part 112, a cover part 114, and a decompression part 116.

  Moreover, the conveyance part 110 is comprised including the rotary body 110a, the belt 110b, and the protrusion part 110c.

  The rotating body 110a is an annular member having a through hole in the center, and a plurality (two in this embodiment) are arranged in the transport direction. A plurality of rotating bodies 110a (two in the present embodiment) are arranged facing each other in the horizontal direction and perpendicular to the conveying direction, are fixed to one end of the shaft 110d, and rotate integrally with the shaft 110d. The rotating shaft of the rotating body 110a is horizontal and vertical to the transport direction.

  The base 102 is a foundation of the transfer device 100. Two support legs 104 are fixed upright on the base 102, two on each of the upstream side and the downstream side in the transport direction. The base 102 is provided with a drive device 110e such as a motor on the upstream side in the transport direction. The shaft 110g is connected to the shaft of the drive device 110e via a shaft coupling 110f, and the rotational force of the drive device 110e is transmitted to the shaft 110g.

  A through hole 104a is provided in the lower portion of the support leg 104, and the shaft 110g is inserted into both of the opposing through holes 104a and is freely rotatable through a bearing provided on the inner peripheral surface of the through hole 104a. Be supported.

  Further, a pulley 110h is attached to the shaft 110g, and the pulley 110h rotates integrally with the shaft 110g.

  A through hole 104 b is also provided in the upper part of the support leg 104. The shaft 110d is rotatably supported through a bearing provided on the inner peripheral surface of the through hole 104b.

  A pulley 110i is attached to the other end of the two shafts 110d arranged on the upstream side in the transport direction on the opposite side to the one end to which the rotating body 110a is fixed. The belt 110j is stretched endlessly by a pulley 110i positioned vertically upward and a pulley 110h positioned vertically downward, and transmits the rotational force of the pulley 110h to the pulley 110i.

  As the pulley 110i rotates, the shaft 110d and the rotating body 110a rotate integrally.

  The rotational force of the driving device 110e is transmitted to the rotating body 110a by such a mechanism. Here, the configuration in which one driving device 110e rotates the rotating body 110a has been described as an example. However, for example, a plurality of driving devices 110e may rotate the rotating body 110a in synchronization. In addition, here, the pulleys 110h and 110i are described as an example in which the pulleys 110h and 110i are arranged on the inner side in the facing direction of the rotating body 110a, but may be arranged on the outer side in the facing direction of the rotating body 110a.

  The belt 110b is stretched endlessly by the plurality of rotating bodies 110a, and rotates in the direction of the white arrow Y shown in FIG. 1C as the rotating body 110a rotates. As shown in FIG. 1A, a plurality (two in the present embodiment) of the belt 110b are arranged opposite to each other in parallel with the transport direction. Further, the belt 110b has a plurality of protrusions 110c.

  The protrusions 110c are made of, for example, resin, and a plurality of protrusions 110c are arranged on the surface of the belt 110b along the conveyance direction to support and support the workpiece.

  The conveyance unit 110 rotates the belt 110b in the direction indicated by the white arrow Y shown in FIG. 1C, so that the work supported by the protrusion 110c in the direction indicated by the white arrow X shown in FIG. Transport to.

  The levitation portion 112 is composed of, for example, an ejection device that ejects compressed air, and is placed on a levitation table 112a disposed on a base 102 between a plurality of conveyance units 110 arranged in parallel to the conveyance direction. . A plurality of floating portions 112 (three in the present embodiment) are juxtaposed along the longitudinal direction along the conveying direction and in the lateral direction. The floating portion 112 causes a gas flow upward in the vertical direction, and part of the work is lifted.

  Specifically, when the floating part 112 spouts gas (compressed air) in a state where the work is in contact with and supported by the projecting portion 110c to generate a gas flow vertically upward, a gap between the floating part 112 and the work is obtained. Air pressure increases. During the conveyance, the workpiece is supported by a force vertically upward due to the pressure of the air and a reaction force from the projecting portion 110c with respect to the weight of the workpiece.

  At this time, the floating part 112 is not the dynamic pressure in the jet direction of the compressed air as the pressure of the air that supports the work, but is generated as a result of the movement of the air that tends to be dispersed in all directions in a narrow space below the work. Since static pressure is used, the workpiece can be supported with a small output.

  FIG. 2 is an explanatory diagram for explaining the structure of the cover unit 114 and the decompression unit 116. Regarding the transfer device 100 during transfer of the workpiece W, the transfer unit 110 and the cover unit 114 on the right side in FIG. The figure which caught the decompression part 116 from the same direction as FIG.1 (b) is shown. However, for easy understanding, the casing of the cover unit 114 and the decompression unit 116 is shown in a sectional view, and the transport unit 110 is shown in a front view.

  The cover part 114 is a cover that is provided in each of the two transport parts 110 and surrounds the entire belt 110b. Here, as shown in FIG. 1 (b), the entire belt 110b has a conveying portion A that moves vertically in the belt 110b and moves in the conveying direction, and a vertically lower portion that moves in the conveying direction. All of the non-conveyance sites B that move in the reverse direction are included.

  Further, in the cover portion 114, the vertically upper wall portion becomes a facing portion 114 b having a facing surface 114 a facing the workpiece W transported by the transporting portion 110. That is, the facing portion 114 b is a part of the cover portion 114, and the facing surface 114 a is an end surface on the vertical upper side of the cover portion 114.

  The opening 114c is a hole formed in the facing surface 114a of the facing portion 114b, and the edge of the opening 114c is formed by the facing portion 114b. Moreover, the opening part 114c connects the inside and the outside of the cover part 114. The opening 114c is provided in the facing portion 114b along the movement locus of the protruding portion 110c in the transport direction so that the cover portion 114 does not interfere with the protruding portion 110c.

  The protrusion 110c protrudes vertically upward from the opening 114c, and its tip is positioned vertically upward from the opening 114c. Therefore, the protrusion 110c can contact the workpiece W.

  The decompression unit 116 includes a fan, a blower, a pump, and the like, and a plurality of the decompression units 116 are arranged on the lower end 114d that is the end surface on the vertically lower side of the cover unit 114 in the transport direction. The decompression unit 116 sucks the air inside the cover unit 114 from the discharge hole 114e provided at the lower end 114d of the cover unit 114, and decompresses the pressure inside the cover unit 114. The decompression unit 116 sucks air (gas) in the vicinity of the protrusion 110c through the opening 114c. Here, the cover 114 serves as a communication path that communicates from the opening 114 c to the decompression unit 116.

  FIG. 3 is an explanatory diagram for explaining the suction effect on the workpiece W. FIG. FIG. 3A illustrates the transport unit 110, the cover unit 114, and the decompression unit 116 of the present embodiment in the same manner as FIG. 2, and FIG. 3B illustrates the transport unit 1 as a comparative example. The cover part 2 and the decompression part 3 are illustrated similarly to FIG.

  FIG. 3C shows a graph in which the horizontal axis in FIG. 3A is the horizontal axis and the absolute value of the negative pressure acting on the workpiece W is the vertical axis. FIG. 3 (d) shows a graph with the horizontal axis representing the position in the left-right direction and the vertical axis representing the magnitude of the absolute value of the negative pressure acting on the workpiece W in FIG.

  As shown in FIG. 3 (b), in the comparative example, the cover portion 2 is provided with an inclined portion 2a that tapers toward the upper vertical side, and an opening 2b is formed at the tip of the inclined portion 2a. . In this case, as shown in FIG. 3D, the absolute value of the negative pressure acting on the workpiece W becomes maximum at the center position of the opening 2b (indicated by the broken line a in FIG. 3D), and the opening When separated from 2b in the left-right direction, the position of the side wall 2c of the cover portion 2 decreases sharply until reaching the position of the side wall 2c (shown by broken lines b and c in FIG. 3D).

  On the other hand, as shown in FIG. 3A, the facing portion 114 b of the present embodiment has a facing surface 114 a formed in parallel with the workpiece W transported by the transporting portion 110. Specifically, the opposing surface 114a has, for example, an inclination angle with respect to the workpiece W to be conveyed within, for example, 5 degrees, and preferably within 1 degree. Therefore, in FIG. 3A, the distance from the workpiece W is approximately equal in the left-right direction. And if air is attracted | sucked from the opening part 114c, air will flow into the flow path f between the opposing part 114b and the workpiece | work W. FIG.

  Since the flow cross-sectional area is narrowed when this air flow flows into the flow channel f, the flow velocity increases by flowing into the flow channel f, and the air flow is sucked into the opening 114c while maintaining the high flow velocity. The

  As a result, according to Bernoulli's theorem, the air pressure is lowered over the entire length of the flow channel f than before flowing into the flow channel f. Thus, as shown in FIG. 3C, the entire length of the flow path f including the center position of the opening 114c (indicated by the broken line a in FIG. 3C) with respect to the workpiece W forming the flow path f. The negative pressure is applied over the range (in the range from the broken line b to the broken line c in FIG. 3C).

  Here, the magnitude of the force for attracting the workpiece W vertically downward by the negative pressure acting on the workpiece W can be evaluated by, for example, the integrated value of the negative pressure shown in FIGS. Comparing FIGS. 3C and 3D, the present embodiment shown in FIG. 3C has a larger suction force with respect to the workpiece W because the section where the absolute value of the negative pressure is larger is longer.

  As described above, the transport apparatus 100 according to the present embodiment increases the suction force acting on the workpiece W without increasing the power consumption by increasing the output of the decompression unit 116 or the like. As a result, it is possible to increase the frictional force between the workpiece W and the projecting portion 110c and to transport the workpiece W stably.

  In addition, since the protruding portion 110c protrudes from the opening 114c, and the suction force acts uniformly on the workpiece W around the protruding portion 110c, the workpiece W can be sucked in a balanced manner, and the opening is opened. Since the portion 114c and the projecting portion 110c are close to each other, the bending moment acting on the workpiece W can be suppressed, and the deformation of the workpiece W due to the suction force can be reduced.

  Further, as described above, the transport unit 110 is covered with the cover unit 114, and the decompression unit 116 sucks the air around the transport unit 110. For this reason, for example, if the dust contained in the exhaust is removed by providing a filter or the like, the transport device 100 floats around the transport unit 110 and the dust attached to the transport unit 110 inside the cover unit 114. It becomes possible to suppress adhesion of dust such as dust to the workpiece W.

  FIG. 4 is an explanatory diagram for explaining a modification. FIGS. 4A to 4D are front views of the same positions as those in FIG. Show. Hereinafter, modifications 1 to 4 will be described in detail with reference to FIG.

(Modification 1)
In the above-described embodiment, the transport apparatus 100 suitable for the case where the workpiece W is hardly bent has been described. In the first modification, it is assumed that the thickness of the workpiece W is thin, and the center sides in the opposing direction of the two transfer units 110 are bent vertically downward. The vertical upper wall portion of the cover portion 214 shown in FIG. 4A becomes a facing portion 214b having a facing surface 214a facing the workpiece W conveyed by the conveying portion 110, and air is sucked vertically downward. The opening 214c is continuous.

  At this time, the opposing part 214b and the opposing surface 214a are inclined with respect to the horizontal direction as shown in FIG. Specifically, the inclination angle of the part of the workpiece W that faces the facing surface 214a is, for example, previously derived from the bending curve of the workpiece W, or actually measured by installing the workpiece W on the conveyance unit 110. I keep it. And the opposing part 214b and the opposing surface 214a are inclined according to the inclination angle.

  In this way, when the workpiece W is thin and easily bent by inclining the opposing surface 214a along the assumed inclination of the workpiece W, the opposing surface 214a is inclined over the horizontal direction of the opposing surface 214a. The separation distance between the facing surface 214a and the workpiece W is kept substantially constant.

  Therefore, the air that has flowed into the flow path f and increased in speed is sucked into the opening 214c with a high flow velocity, and the suction force to the work W is increased, so that the work W can be stably conveyed with a thin plate thickness that is easy to bend. It becomes.

(Modification 2)
In the first modification, the configuration in which the facing surface 214a is inclined with respect to the horizontal direction has been described. In the second modification, for example, a configuration that can cope with a case where the thickness or material of the workpiece W is changed for each of a plurality of lots and the deflection angle of the workpiece W changes will be described.

  In Modification 2, the transport apparatus further includes an angle adjustment unit 320 as shown in FIG. 4B in addition to the configuration of the transport apparatus 100 of the above-described embodiment. The angle adjustment unit 320 includes a main body 320a and a shaft 320b fixed to the main body 320a.

  The main body 320 a is fixed to the outer wall of the cover part 114, and a part of the transport part 110 and the decompression part 116 is fixed to the cover part 114. That is, the main body 320a, the conveyance unit 110, the cover unit 114, and the decompression unit 116 can be integrally tilted in any direction indicated by a double-pointed arrow in FIG. 4B with the shaft 320b as the rotation center. It has become.

  Further, the components constituting the transport unit 110 described in the above-described embodiment are not fixed to the base 102 and the support legs 104 but are supported by the angle adjustment unit 320 via the cover unit 114. And when it inclines, the cover part 114 is separated from the ground etc., for example so that a disorder | damage | failure may not be distribute | arranged on the inclining orbit.

  The shaft 320b is rotated in any direction indicated by a double arrow in FIG. 4B by a motor (not shown), and is fixed by a fixing member, an engaging member, or the like at an arbitrary rotational position.

  Thus, the angle adjustment unit 320 adjusts the inclination angle of the facing surface 114a with respect to the horizontal direction. Therefore, even if the deflection angle of the workpiece W changes, the workpiece W and the facing surface 114a can be kept parallel by adjusting the tilt angle by the angle adjusting unit 320. Thus, the flow velocity of the air flowing into the flow path f is maintained at a high speed, the suction force with respect to the workpiece W is increased, and the workpiece W can be stably conveyed.

(Modification 3)
In the above-described embodiment, the configuration in which the suction force with respect to the workpiece W is increased by increasing the air flow rate has been described. In the third modification, a configuration in which the suction force for the workpiece W can be increased by further increasing the air flow rate will be described.

  As shown in FIG. 4C, in the third modification, the vertical upper wall portion of the cover portion 314 is a facing portion 314b having a facing surface 314a facing the workpiece W transported by the transporting portion 110. It continues to the opening 314c from which air is sucked vertically downward. A gradually increasing portion 314f is formed at the end of the facing surface 314a.

  The gradually increasing portion 314f is a portion where the distance from the workpiece W gradually increases as the distance from the opening 314c increases. For example, the gradually increasing portion 314f has a so-called R (fillet) shape in which the center of curvature is located inside the cover portion 314. ing.

  Therefore, the opposing surface 314a hardly disturbs the air flow such as a vortex in the vicinity of the entrance of the flow path f, and the pressure loss is suppressed and the air flow rate is increased. Accordingly, the workpiece W can be stably conveyed.

(Modification 4)
In the above-described embodiment, the case has been described in which the facing portion 114b is configured by the vertically upper wall portion of the cover portion 114. In the fourth modification, a configuration in which the area of the facing surface 414a of the facing portion 414b can be enlarged to increase the suction force with respect to the workpiece W will be described.

  As shown in FIG. 4 (d), in Modification 4, the facing portion 414b is a part of the cover portion 414 that covers at least the side surface and the vertical lower surface of the belt 110b, and the upper portion of the cover portion 414 is vertically upper. At the end of this, a so-called flange shape is formed that protrudes horizontally from the side wall 414g of the cover portion 414.

  And the side which opposes the workpiece | work W conveyed by the conveyance part 110 among the opposing parts 414b becomes the opposing surface 414a. In addition, an opening 414c is formed on the vertically upper side of the side wall 414g of the cover 414 and on the center side of the facing portion 414b. The facing portion 414b is continuous with the opening 414c.

  In this manner, by forming the facing portion 414b so as to protrude from the side wall 414g, the area of the facing surface 414a is increased, the suction force with respect to the workpiece W is increased, and the workpiece W can be stably conveyed.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to this embodiment. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Is done.

  In the above-described embodiment, the case where the facing surface 114a is formed in parallel with the workpiece W conveyed by the conveying unit 110 has been described. However, as in the facing surface 514a illustrated in FIG. Instead, it may be a plane inclined with respect to the workpiece W. In this case, for example, the inclination angle with respect to the horizontal direction is preferably within 5 degrees. Moreover, it may have a tapered shape with the opening 114c as the center, like a facing surface 614a shown in 5 (b). In this case, for each tapered surface, the inclination angle with respect to the horizontal direction is preferably within 5 degrees. However, as in the above-described embodiment, by forming the facing surface 114a in parallel with the workpiece W conveyed by the conveying unit 110, the air flow velocity can be increased over the entire length of the flow path f, and the negative pressure is increased. It is possible to maintain a section where the absolute value of is long.

  In the above-described embodiment and modification, the case where the cover portion is provided and the opening is formed on the facing surface of the facing portion of the cover portion has been described. However, the cover portion may not be provided.

  For example, as shown in FIG. 5C, a suction tube 714 is provided between the transport unit 110 and the support leg 104. A facing portion 714b having a facing surface 714a facing the workpiece W is provided at an end portion on the vertical upper side of the suction pipe 714, and a part of the edge of the opening 714c is formed by the facing portion 714b. The decompression unit 116 decompresses the inside (communication path) of the suction pipe 714 and sucks the gas in the vicinity of the projection 110c through the opening 714c.

  As described above, even in the configuration in which the cover portion is not provided, the pressure of the air flowing through the flow path f is reduced, the suction force acting on the workpiece W is increased, and the workpiece W and the protruding portion, as in the above-described embodiment. The frictional force with 110c can be increased, and the workpiece W can be stably conveyed.

  Further, in the above-described modification 3, the case where the gradually increasing portion 314f has an R (fillet) shape has been described, but the gradually increasing portion has a tapered shape as the distance from the workpiece W gradually increases as the distance from the opening 314c increases. There may be other shapes.

  Further, in the embodiment and the modification described above, the case where the transfer device includes the floating portion 112 has been described. However, the transfer device may not support the floating portion 112 and may support the workpiece W downward only with the transfer portion 110. In particular, when the workpiece W is low in rigidity and difficult to support because the workpiece W is bent, three or more transport units 110 are arranged in the horizontal and vertical directions to support the center side of the workpiece W. There may be.

  Further, only the modified example 3 described above is described with the configuration in which the gradually increasing portion 314f is provided. However, in the embodiment and the modified examples 1, 2, and 4, the gradually increasing portion 314f may be provided at the end of the facing surface. .

  The decompression unit 116 may be configured by a decompression device such as a vacuum device or an ejector. If it is difficult to secure a space for arranging these decompression devices close to the cover unit, the decompression unit 116 communicates with the decompression device. The end of the pipe may be arranged instead of the decompression unit 116.

  INDUSTRIAL APPLICABILITY The present invention can be used for a transport device that transports a relatively thin plate glass or the like.

W ... Workpiece 100 ... Conveying device 110 ... Conveying part 110a ... Rotating body 110b ... Belt 110c ... Projection part 114, 214, 314, 414 ... Cover part (communication path)
114a, 214a, 314a, 414a, 514a, 614a, 714a ... opposing surfaces 114b, 214b, 314b, 414b, 714b ... opposing parts 114c, 214c, 314c, 414c, 714c ... opening 116 ... decompression part 314f ... gradually increasing part 320 ... Angle adjustment part 414g ... side wall 714 ... suction pipe (communication path)

Claims (6)

A plurality of rotating bodies, and a belt having a plurality of projecting portions that contact and support the workpiece and stretched endlessly by the plurality of rotating bodies to convey the workpiece, the belt being parallel to the conveying direction A plurality of conveying units arranged opposite to each other;
A facing portion that is disposed on the transporting portion side with respect to the work transported by the transporting portion and has a facing surface facing the work ;
An opening in which at least a part of the edge is formed by the facing portion;
A cover portion that covers at least a side surface and a vertical lower surface of the belt and communicates with the opening,
A pressure reducing unit for reducing the pressure in the cover portion, through the opening, to suck the opposite side of the gas in the workpiece to a said protrusion near,
Equipped with a,
The opposing portion from the side wall of the cover portion, conveying apparatus according to claim Rukoto protruding on the opposite side of the opposing direction of the opposing side walls.   The transport apparatus according to claim 1, wherein the facing surface is formed in parallel with a workpiece transported by the transport unit.   The said opposing surface inclines with respect to a horizontal direction along the assumed inclination of the workpiece | work in which the center side of the opposing direction of these some conveyance parts bends vertically downwards, It is characterized by the above-mentioned. Transport device.   The conveyance device according to any one of claims 1 to 3, further comprising an angle adjustment unit that adjusts an inclination angle of the facing surface with respect to a horizontal direction.   5. The transport according to claim 1, wherein a gradually increasing portion is formed at an end portion of the facing surface so that a distance from the workpiece gradually increases as the distance from the opening portion increases. apparatus. The cover portion according to any one of claims 1-5, wherein the both covering TURMERIC non conveying portion which moves in the opposite direction of the conveying portion and the conveying direction to move in the conveying direction of the belt Conveying device.

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