JP5452314B2 - Aluminum plate separating and conveying apparatus and aluminum plate separating and conveying method - Google Patents

Description

  The present invention relates to a separating and conveying apparatus and a separating and conveying method for separating and conveying the uppermost plate when lifting and conveying a laminated aluminum plate in which aluminum plates coated with rust preventive oil are stacked.

  Molding blanks such as automotive panel materials are usually coated with rust preventive oil (rust preventive lubricating oil or rust preventive cleaning oil) on the plate surface to prevent wrinkles during transportation. Such a molding blank is cut and cut as a sheet material, stacked and packed, and shipped to an automobile manufacturer. And it is automatically conveyed to a press process and press-molded into the shape of a hood or door of an automobile.

  The sheet material that is automatically conveyed to the pressing process is coated with rust-preventive oil on the plate surface as described above. A phenomenon called a double blank occurs in which the plates after the eyes are brought into close contact by the adhesive force of the rust preventive oil and a plurality of sheet materials are lifted at once. Since such a double blank causes a failure of the press device or a line stop, it is necessary to have a method for preventing the adhesion of a plurality of plates by rust preventive oil and reliably separating only the top plate one by one. .

  Here, for example, if the sheet material is a magnetic material such as an iron plate, a method of separating by a magnetic force using a magnet or the like can be used, but an aluminum plate (pure aluminum plate and aluminum alloy) that is frequently used as an automotive panel material or the like can be used. Such a method cannot be used because the plate (including the plate) is a non-magnetic material.

  Therefore, in the field of using an aluminum plate as a sheet material, for example, a separation method using a fixed air blow 40, a scratch plate 50, or the like as shown in FIG. 4 is generally used. That is, as shown in FIG. 4, by disposing the air blow 40 on the side surface of the laminated aluminum plate B and injecting air, the oil film between the plates of the laminated aluminum plate B is dispersed to weaken the adhesion between the plates. I was able to. Moreover, as shown in FIG. 4, the board | plate edge part of the laminated aluminum plate B can be scratched by arrange | positioning the scratch board 50 on the side surface of the laminated aluminum board B, and it contact | adhered to the uppermost board B1. The second plate could be easily separated.

  As a prior art employing such a separation method, for example, a metal plate separation device described in Patent Document 1 can be cited. In this metal plate separating apparatus, the central portion of the metal plate is adsorbed by a vacuum cup, and air from an air blow is jetted to both ends of the metal plate and the scratch plate is brought into contact with the metal plate. It made it easy to separate the second metal plate that was in close contact with the upper metal plate and lifted together.

  In addition, in Patent Document 2, a cylinder that operates in a direction in which one end corner portion of the plate material to be lifted is tilted in advance with respect to the horizontal, and the plate material is adsorbed by an adsorbent provided at the tip thereof. There has been proposed a plate material peeling apparatus that peels an upper plate material from outside. Further, in Patent Document 3, the uppermost sheet material is provided by an air injection device provided with an injection nozzle that is provided so as to be movable up and down within the range of the height of the stacked sheet materials, and is pushed down by the pushing member and descends together with the suction member. There has been proposed a sheet material feeding device for separating the sheets.

  And in patent document 4, the air guide provided in the position approaching the upper surface of the blank material which transfers to a blank material receiving apparatus from a conveying apparatus, and the air which produces an air flow between an air guide and the upper surface of a blank material An air blow type pillar equipped with a flow generating device has been proposed. Moreover, in patent document 5, it is a blow nozzle for isolate | separating the laminated | stacked board | plate material, Comprising: The cylindrical member which has a predetermined | prescribed shape, and is loosely inserted into the inner space from the one end side of the cylindrical member, and a nozzle is inserted in the front-end | tip. There has been proposed a blow nozzle including an injection nozzle having an opening.

JP 2000-313525 A No. 3-2524 JP 2009-46260 A Japanese Patent No. 3228307 Japanese Patent No. 3940380

  However, the conventional technique is insufficient to reliably separate the aluminum plates having a small specific gravity and low rigidity one by one, and the double blank cannot be completely prevented. For example, the separation / conveyance device 100 shown in FIG. 4 and the metal plate separation device proposed in Patent Document 1 cannot be arranged in the peripheral portion near the end of the plate to be lifted most because of the structure of the vacuum cup. There was room for blanking. In addition, by using the scratch plate, wrinkles are likely to occur at the end of the plate, and as shown in FIG. 4, the peripheral portion may be bent, and the shape accuracy and surface quality of the final product are deteriorated. was there. Further, since the air blows are arranged uniformly along the stacking direction of the plates, there are problems that the efficiency of the air blow is poor and the work environment such as noise is deteriorated.

  The plate material peeling apparatus proposed in Patent Document 2 also has room for double blanking because it cannot be arranged at the peripheral edge near the plate end that is most desired to be lifted due to the structure of the adsorbent (vacuum cup). . Further, since the plate material is rolled up from the outside by the adsorbent, the peripheral edge portion may be bent, and there is a problem that the shape accuracy and surface quality of the final product are deteriorated.

  In the feeding device proposed in Patent Document 3, the air injection device is provided so as to be movable up and down within the range of the height of the stacked sheet materials. However, it is also effective compared to the conventional technology with a fixed air nozzle, especially for laminated aluminum plates coated with rust-preventive oil, which tends to generate double blanks. There was no difference. Furthermore, the air blow type pillar proposed in Patent Document 4 and the blow nozzle proposed in Patent Document 5 can also obtain sufficient effects for the separation of laminated aluminum plates coated with antirust oil. could not.

  The present invention has been made in view of such problems, and without lifting the shape accuracy and surface quality of the final product during the lifting and conveyance of the laminated aluminum plate coated with rust preventive oil on the surface. It is an object of the present invention to provide an aluminum plate separating and conveying apparatus and an aluminum plate separating and conveying method capable of reliably separating and conveying only the uppermost plate.

In order to solve the above-described problems, an aluminum plate separating and conveying apparatus according to the present invention is the uppermost plate of a laminated aluminum plate in which aluminum plates for forming automotive panels whose surfaces are coated with rust preventive oil are stacked. A separating and conveying apparatus for separating and conveying a plurality of vacuum cups disposed above the laminated aluminum plate and facing the center of the uppermost plate and simultaneously moving up and down; Separating means disposed opposite to a side surface of the laminated aluminum plate, and the separating means is provided so as to be lifted and lowered simultaneously with the vacuum cup . shape between the guide plate which is arranged facing to generate a venturi effect through a peripheral portion with a predetermined gap therebetween, and the guide plate and the top of the plate Said gap and is, to the the air nozzle for supplying air to the boundary between the top of the plate and the second sheet of the plate, become composed.

  The aluminum plate separating and conveying apparatus having such a configuration is formed between the predetermined gap formed by the guide plate facing the uppermost plate and the side surface of the laminated aluminum plate and the air nozzle. By supplying air from the air nozzle to the predetermined space, a pressure difference is generated between the predetermined gap and the predetermined space. The uppermost plate can be lifted by the venturi effect due to the pressure difference and attracted to the lower surface of the guide plate, and the uppermost plate can be separated from the second and subsequent plates. At the same time, since air is supplied to the boundary between the uppermost plate and the second plate, the oil film at the plate edge and the plate boundary can be blown off by wind force to weaken the adhesion between the plates. The separation of the upper plate can be promoted.

  Further, the aluminum plate separating and conveying apparatus according to the present invention is configured such that the separating means is disposed at the end of a frame member extending from the conveying means to both sides of the laminated aluminum plate.

  In the aluminum plate separating and conveying apparatus having such a configuration, since the separating means is fixed to the conveying means via the frame member, the separating means is interlocked when the conveying means is moved up and down by an elevating means (not shown). Then go up and down. Therefore, by adjusting the size, position, etc. of the frame member and air nozzle in advance, it is desired to inject air such as the predetermined gap, the predetermined space, or the boundary between the uppermost plate and the second plate. On the other hand, air can be injected accurately and reliably.

  In the aluminum plate separating and conveying apparatus according to the present invention, the distance L between the lower surface of the guide plate and the upper end of the air nozzle outlet is in the range of 2t ≧ L with respect to the plate thickness t of the aluminum plate. It is set as the structure which is.

  In the aluminum plate separating and conveying apparatus having such a configuration, the distance L from the lower surface of the guide plate arranged to face the peripheral edge of the uppermost plate to the upper end of the air nozzle is less than twice the plate thickness of the aluminum plate. Therefore, the air nozzle injection port is disposed relatively close to the guide plate, the uppermost plate, and the second plate. Therefore, a predetermined gap formed between the guide plate and the uppermost plate, a predetermined space formed between the side surface of the laminated aluminum plate and the air nozzle, and the uppermost plate and the second plate Since air can be reliably supplied to the boundary, separation of the uppermost plate can be further promoted.

  Further, in the aluminum plate separating and conveying apparatus according to the present invention, the shape of the injection port of the air nozzle is rectangular, and the length h in the height direction of the injection port of the air nozzle is the thickness t of the aluminum plate. On the other hand, it is set as the structure which exists in the range of 2t> = h> = 0.5t.

  The aluminum plate separating and conveying apparatus having such a configuration can efficiently supply air to the side surface of the laminated aluminum having the same cross-sectional shape because the shape of the air nozzle injection port is rectangular. . Further, since the length h in the height direction of the air nozzle injection port is in the range of 2 to 0.5 times the thickness of the aluminum plate, the wind force of the air is not dispersed over a wide range. Therefore, a predetermined gap formed between the guide plate and the uppermost plate, a predetermined space formed between the side surface of the laminated aluminum plate and the air nozzle, and the uppermost plate and the second plate Since air can be reliably supplied to the boundary, separation of the uppermost plate can be further promoted.

And the aluminum plate separating and conveying method according to the present invention comprises using the aluminum plate separating and conveying device, the uppermost plate of the laminated aluminum plates in which the aluminum plates coated with antirust oil on the surface are stacked. And a separating / conveying method for separating by a separating means comprising a guide plate and an air nozzle, and for conveying by a conveying means having a vacuum cup, between the guide plate and the uppermost plate and by the air nozzle. The procedure includes a step of supplying air to the boundary between the upper plate and the second plate, and a step of sucking and transporting the central portion of the uppermost plate by the transport means.

  The aluminum plate separating and conveying method that performs such a procedure includes a predetermined gap formed between the guide plate and the uppermost plate, and a predetermined space formed between the side surface of the laminated aluminum plate and the air nozzle. By supplying air from the air nozzle, a pressure difference is generated between the predetermined gap and the predetermined space. The uppermost plate can be lifted by the venturi effect due to the pressure difference and attracted to the lower surface of the guide plate, and the uppermost plate can be separated from the second and subsequent plates. At the same time, since air is supplied to the boundary between the uppermost plate and the second plate, the oil film at the plate edge and the plate boundary can be blown off by wind force to weaken the adhesion between the plates. The separation of the upper plate can be promoted.

  According to the aluminum plate separating and conveying apparatus and the aluminum plate separating and conveying method according to the present invention, the shape of the final product can be obtained even when the plates are in close contact with each other by being coated with antirust oil on the surface. Only the uppermost plate can be reliably separated and transported without degrading accuracy and surface quality.

It is the schematic which shows the separation conveyance apparatus of the aluminum plate which concerns on embodiment, (a) is a front view which shows the state before conveyance of the uppermost board, (b) is the state at the time of conveyance of the uppermost board. FIG. It is a top view which shows the separation conveyance apparatus of the aluminum plate which concerns on embodiment. It is the schematic which shows the separation means of the separation conveyance apparatus of the aluminum plate which concerns on embodiment, (a) is a figure which shows the positional relationship of the guide plate of the separation means, an air nozzle, and a lamination | stacking aluminum plate, (b) It is a figure which shows the specific shape of the injection port of an air nozzle. It is a front view which shows the separation conveying apparatus which concerns on a prior art.

  Hereinafter, the separation conveyance device 10 according to the embodiment and the separation conveyance method using the same will be described in detail with reference to FIGS. 1 to 3. First, as shown in FIGS. 1 (a) and 1 (b), the separation / conveying device 10 is the uppermost layer at the time of lifting and conveying a laminated aluminum plate B in which aluminum plates coated with rust preventive oil are stacked. It is an apparatus for separating and transporting the plate B1 from the second and subsequent plates. The separating and conveying device 10 is used when, for example, an aluminum plate is lifted and conveyed on a pressing device in a press process of an automobile manufacturer.

  Although the aluminum plate conveyed by the separation conveying apparatus 10 is comprised from the aluminum alloy which added various elements to pure aluminum or pure aluminum, the specific composition is not specifically limited. Moreover, since the size, thickness, weight, etc. of the aluminum plate are appropriately changed depending on the purpose, there is no particular limitation.

Liquid rust preventive oil (rust preventive lubricating oil or rust preventive cleaning oil) is applied to both surfaces of the aluminum plate by a rust preventive oil application device (not shown). Although the kind of rust preventive oil applied to the aluminum plate is not particularly limited, for example, a rust preventive cleaning oil such as “Preton (registered trademark) R-303P” manufactured by Sugimura Chemical Co., Ltd. can be used. Further, the amount of the rust preventive oil to be applied to the aluminum plate is not particularly limited, but is preferably within a range of 0.3 to 1.0 g / m ² from the viewpoint of appropriately preventing wrinkles.

  Next, a specific configuration of the separating and conveying apparatus 10 will be described in detail. As shown in FIGS. 1 and 2, the separation / conveyance device 10 includes a conveyance unit 1, a separation unit 3, and a frame member 6 as main components.

  The conveying means 1 is a means for conveying the uppermost plate B1 of the laminated aluminum plate B. As shown in FIGS. 1 and 2, the conveying means 1 in this embodiment includes a square flat plate portion, four extending portions extending in the stacking direction of the laminated aluminum plate B from the four corner portions of the flat plate, It is composed of Moreover, the conveyance means 1 is arrange | positioned above the laminated aluminum plate B, as shown to FIG. 1 (a), (b), and the above-mentioned flat plate part is parallel to the laminated aluminum plate B, and faces each other. Is arranged.

  Above the conveying means 1, an elevating means such as a cylinder (not shown), a conveying rail and a conveying drive source (not shown) are provided so that the conveying means 1 can be moved up and down or driven left and right. Moreover, as shown in FIG. 1 and FIG. 2, vacuum cups 2 are respectively disposed at the tips of the four extending portions of the conveying means 1.

  The vacuum cup 2 is for adsorbing the vicinity of the central portion of the laminated aluminum plate B. As shown in FIGS. 1 and 2, the vacuum cup 2 is formed in a disc shape, and an internal space (not shown) is formed inside. Further, the vacuum cup 2 is disposed so as to face the vicinity of the central portion of the uppermost plate B1 with a predetermined interval, as shown in FIG. 1A, before the uppermost plate B1 is conveyed. ing. The number of vacuum cups 2 is not particularly limited, but in the present embodiment, four vacuum cups 2 are arranged as shown in FIG. Further, the material of the vacuum cup 2 is not particularly limited, but can be made of, for example, elastic rubber or the like.

  The vacuum cup 2 is connected to a negative pressure generation source such as a vacuum pump (not shown), and is configured to generate a negative pressure in the above-described internal space. That is, when the uppermost plate B1 is transported, negative pressure is generated in the internal space of the vacuum cup 2 by the negative pressure generating source, and as shown in FIG. The vicinity of the center can be adsorbed at four points.

  The separating means 3 is a means for separating the uppermost plate B1 of the laminated aluminum plate B from the second and subsequent plates. As shown in FIGS. 1 and 2, the separating means 3 is arranged so as to be suspended from the end of a frame member 6 extending from the conveying means 1 to both sides of the laminated aluminum plate B (left and right when FIG. 1 is viewed from the front). It is installed. That is, the separating means 3 is fixed to the conveying means 1 via the frame member 6, and is configured to move up and down in conjunction with the conveying means 1 when it is moved up and down by an elevating means (not shown). Therefore, by adjusting the size and position of the frame member 6 and the air nozzle 5 in advance, the predetermined gap S1, the predetermined space S2, or the boundary between the uppermost plate B1 and the second plate, etc. It is possible to accurately and reliably inject air to a place where air is to be injected. As shown in FIGS. 1A and 1B, the separating means 3 is specifically composed of two members, a guide plate 4 and an air nozzle 5.

  The guide plate 4 is a plate for adsorbing the peripheral portion of the uppermost plate lifted up by the venturi effect. As shown in FIG. 2, the guide plate 4 is a rectangular flat plate. Further, as shown in FIGS. 1 (a) and 3 (a), the guide plate 4 is arranged with a predetermined gap S1 from the peripheral portion of the uppermost plate B1, and the guide plate 4 has a lower surface. And the peripheral portion of the uppermost plate B1 face each other.

  Here, the predetermined gap S <b> 1 is a gap having such a magnitude that a pressure difference is generated between a side surface of the laminated aluminum plate B and a predetermined space S <b> 2 between the air nozzle 5 when air is supplied by the air nozzle 5. Specifically, it indicates a gap having a cross-sectional area smaller than that of a predetermined space S2 described later. Accordingly, the specific size of the predetermined gap S1 is not particularly limited because it is determined by the relationship with the size of the predetermined space S2 described later. Details of the venturi effect using the pressure difference between the predetermined gap S1 and the predetermined space S2 will be described later.

  As shown in FIGS. 1A and 1B, the guide plate 4 has a top end of a frame member 6 connected to the upper surface thereof, and an air nozzle 5 disposed on a part of the lower surface thereof. The number of guide plates 4 is not particularly limited, but in the present embodiment, a total of four guide plates 4 are disposed on each side of the laminated aluminum plate B as shown in FIG. Moreover, the raw material and board thickness of the guide plate 4 should just be a raw material and board thickness which can maintain rigidity, and are not specifically limited.

  In order to surely obtain the Venturi effect described later, the length A of the overlapping portion between the guide plate 4 and the uppermost plate B1 shown in FIG. 3A is set to 10 to 80 mm, as shown in FIG. The width W of the guide plate 4 shown is preferably 10 to 50 mm.

  The air nozzle 5 is for injecting air to the side surface of the laminated aluminum plate B in order to generate a venturi effect. As shown in FIGS. 1 and 3, the air nozzle 5 is formed in a cubic shape. In addition, as shown in FIGS. 1A and 1B, the air nozzle 5 is disposed so as to face the side surface of the laminated aluminum plate B with a predetermined space S2.

  Here, the predetermined space S2 is a space having a size in which a pressure difference is generated between the above-described guide plate 4 and the predetermined gap S1 between the uppermost plate B1 when air is supplied by the air nozzle 5. Specifically, it indicates a space having a cross-sectional area larger than the cross-sectional area of the predetermined gap S1 described above. Accordingly, the specific size of the predetermined space S2 is not particularly limited because it is determined by the relationship with the size of the predetermined gap S1. Details of the venturi effect using the pressure difference between the predetermined gap S1 and the predetermined space S2 will be described later.

  Further, when forming the predetermined space S2, the distance d between the side surface of the laminated aluminum plate B and the air nozzle 5 shown in FIG. 3A is the type or shape of the nozzle, or the distance between the guide plate 4 and the guide plate 4 described above. Although the optimum range is determined depending on the relationship with the size of the predetermined gap S1 between the upper plate B1 and the like, for example, it is preferably within a range of 5 to 30 mm.

  As shown in FIGS. 1A and 1B, the air nozzle 5 has a part of the guide plate 4 connected to the upper surface thereof. The number of air nozzles 5 is not particularly limited, but in this embodiment, a total of four air nozzles 5 are provided, two on each side of the laminated aluminum plate B as shown in FIGS. Moreover, the material of the air nozzle 5 is not particularly limited, but can be made of a metal material such as steel, for example.

  The air nozzle 5 is connected to an air supply source (not shown), and is configured to be able to supply air from the injection port 5a on the laminated aluminum plate B side. And at the time of conveyance of the uppermost board B1, the air from the said air supply source is injected by the side of the laminated aluminum plate B from the injection outlet 5a. Note that the air volume supplied from the air nozzle 5 varies depending on the size, thickness, weight, and the like of the aluminum plate to be lifted and conveyed, and the optimum air volume is experimentally determined in advance.

  Here, the air jetted from the jet port 5a of the air nozzle 5 specifically includes a predetermined gap S1 formed between the guide plate 4 and the uppermost plate B1, and the uppermost plates B1 and B2. To the boundary with the first plate. The air supplied to the boundary between the uppermost plate B1 and the second plate is also supplied to a predetermined space S2 formed between the side surface of the laminated aluminum plate B and the air nozzle 5. . As described above, the predetermined gap S1 and the predetermined space S2 are formed so that the cross-sectional area of the predetermined gap S1 is smaller, so that the flow rate of the air supplied to the predetermined gap S1 is in the predetermined space S2. It becomes higher than the flow rate of the supplied air.

  According to Bernoulli's theorem, when the flow rate is high, the pressure is low, and when the flow rate is low, the pressure is high. Therefore, the pressure in the predetermined gap S1 is lower than the predetermined space S2, and a pressure difference occurs between the two. To do. Therefore, due to the venturi effect, a negative pressure is generated between the predetermined gap S1, that is, between the guide plate 4 and the uppermost plate B1, and the peripheral portion of the uppermost plate B1 is lifted and adsorbed on the lower surface of the guide plate 4. It will be.

  Then, by adsorbing the vicinity of the central portion of the uppermost plate B1 whose peripheral portion is adsorbed to the lower surface of the guide plate 4 with the above-described vacuum cup 2, only the uppermost plate B1 is easily separated. be able to. At the same time, air is also supplied to the boundary between the uppermost plate B1 and the second plate, so that the oil film at the plate end and the plate boundary can be blown away by wind force to weaken the adhesion. Separation of the upper plate B1 can be promoted.

  The injection port 5 a is a hole for injecting air formed in the air nozzle 5. The injection port 5a is formed in the side surface side of the laminated aluminum plate B, as shown to Fig.1 (a), (b).

  Here, the injection port 5a can be formed in a circular or elliptical shape as shown in FIGS. 1 (a) and 1 (b), but it is formed in a rectangular shape as shown in FIG. 3 (b). Is preferred. Thus, air can be efficiently supplied with respect to the side surface of the laminated aluminum plate B in which cross-sectional shape was similarly formed in the rectangular shape by forming the injection port 5a in a rectangular shape.

  Moreover, it is preferable that the injection port 5a makes the length h of the height direction shown in FIG.3 (b) into the range of 2t> = h> = 0.5t with respect to the plate | board thickness t of an aluminum plate. Thus, by making the length h in the height direction of the injection port 5a within the range of 2 to 0.5 times the thickness of the aluminum plate, the wind force of the air is not dispersed over a wide range. . Therefore, a predetermined gap S1 formed between the guide plate 4 and the uppermost plate B1, a predetermined space S2 formed between the side surface of the laminated aluminum plate B and the air nozzle 5, and the uppermost plate B1. Air can be reliably supplied to the boundary with the second plate. Therefore, the separation of the uppermost plate B1 can be further promoted.

  Further, the separating means 3 may set the distance L between the lower surface of the guide plate 4 and the upper end of the injection port 5a of the air nozzle 5 within a range of 2t ≧ L (≧ 0) with respect to the thickness t of the aluminum plate. preferable. Thus, by setting the distance L from the lower surface of the guide plate 4 facing the peripheral edge of the uppermost plate B1 to the upper end of the injection port 5a to be not more than twice the plate thickness of the aluminum plate, the injection port 5a. Are arranged relatively close to the guide plate 4, the uppermost plate B1, and the second plate. Therefore, a predetermined gap S1 formed between the guide plate 4 and the uppermost plate B1, a predetermined space S2 formed between the side surface of the laminated aluminum plate B and the air nozzle 5, and the uppermost plate B1. Since air can be reliably supplied to the boundary with the second plate, the separation of the uppermost plate B1 can be further promoted.

  On the other hand, when the distance L exceeds 2t, since the position of the injection port 5a is far from the guide plate 4, the uppermost plate B1, and the second plate, the effect of separating the uppermost plate B1 is reduced. Therefore, the distance L is within the above range. The distance L between the lower surface of the guide plate 4 and the upper end of the injection nozzle 5a of the air nozzle 5 is determined by increasing or decreasing the height h of the injection nozzle 5a and the length of the air nozzle 5 in the height direction. Can be adjusted by adjusting the position of the injection nozzle 5a in the height direction of the air nozzle 5 up and down.

  The frame member 6 is a member for suspending and supporting the separating means 3 on both sides of the laminated aluminum plate B. Each frame member 6 is formed in an L shape as shown in FIGS. 1 and 2. Moreover, the frame member 6 is arrange | positioned above the laminated aluminum plate B, as shown to Fig.1 (a), (b).

  As shown in FIGS. 1 and 2, one end of the frame member 6 is connected to the conveying means 1, and the separating means 3 is disposed at the other end. Although the number of the frame members 6 is not particularly limited, in the present embodiment, as shown in FIGS. 1 and 2, a total of four are provided on each side of the laminated aluminum plate B. Further, the material of the frame member 6 is not particularly limited, but can be made of a highly rigid metal material such as steel, for example.

  The separating and conveying apparatus 10 having the above configuration is formed between a predetermined gap S1 formed between the guide plate 4 and the uppermost plate B1, and between the side surface of the laminated aluminum plate B and the air nozzle 5. By supplying air from the air nozzle 5 to the predetermined space S2, a pressure difference is generated between the predetermined gap S1 and the predetermined space S2. The uppermost plate B1 can be lifted by the venturi effect due to the pressure difference and adsorbed to the lower surface of the guide plate 4, and the uppermost plate B1 can be separated from the second and subsequent plates. At the same time, in order to supply air to the boundary between the uppermost plate B1 and the second plate, the oil film at the plate end and the plate boundary can be blown off by wind force to weaken the adhesion between the plates, Separation of the uppermost plate B1 can be promoted.

  Further, when the separation / conveying device 10 having such a configuration is used, the plate end portion is not bent or wrinkles are not generated at the plate end portion as in the conventional case, so that the shape accuracy and surface quality of the final product are deteriorated. There is no need to do. Furthermore, since air is injected to the vicinity of the uppermost plate B1 to be separated, the efficiency is high and the work environment such as noise is not deteriorated. Further, even for an automobile manufacturer that performs press working or the like, there is an accompanying effect that degreasing before coating is easy and cost performance of the degreasing waste liquid treatment is increased.

Here, the separating and conveying apparatus 10 according to the embodiment may change each configuration as follows.
For example, the separating unit 3 may be provided as an independent configuration in the separating and conveying apparatus 10 without using the frame member 6, and the separating unit 3 may be moved up and down in conjunction with the conveying unit 1 using another lifting unit. Or it is good also as a structure which separates the peripheral part of the uppermost board B1 prior to adsorption | suction near the center part by the vacuum cup 2 by the separation means 3, without interlocking | separating the separation means 3 with the raising / lowering of the conveyance means 1. FIG. . However, in this case, it is necessary to adjust the air volume, the pressure difference, etc. within a range in which the peripheral edge of the uppermost plate B1 is separated in advance and plastic deformation of the peripheral edge of the plate or bending reaction force higher than the venturi effect does not occur. There is.

  Further, the guide plate 4 in the separating means 3 needs to have rigidity for lifting the uppermost plate B1 by the venturi effect. That is, when the uppermost plate B1 is lifted together with the vacuum cup 2, if the guide plate 4 is greatly deformed, the venturi effect cannot be obtained. Therefore, the guide plate 4 does not necessarily have a flat plate shape. If the lower surface facing the peripheral portion of the uppermost plate B1 is flat, a structure in which a rib is provided on the upper surface side, a hollow square pipe shape, or the like is necessary. As long as sufficient rigidity can be secured, the shape can be appropriately selected.

  Next, the operation of the separation and conveyance device 10 according to the embodiment, that is, the separation and conveyance method according to the embodiment will be described. In the separating and conveying method according to the embodiment, the first step of separating the peripheral portion of the uppermost plate B1 of the laminated aluminum plate B by the separating means 3 and the central portion of the uppermost plate B1 by the conveying means 1 are separated. The second step is roughly divided. Note that these steps may be performed in the order of the first and second steps, or the first and second steps may be performed simultaneously.

(First step)
In the first step, the air nozzle 5 of the separating means 3 forms a predetermined gap S1 formed between the guide plate 4 and the uppermost plate B1 and between the side surface of the laminated aluminum plate B and the air nozzle 5. Air is supplied to the predetermined space S2 and the boundary between the uppermost plate B1 and the second plate.

  As a result, a negative pressure is generated between the predetermined gap S1, that is, the guide plate 4 and the uppermost plate B1, due to the above-mentioned venturi effect, and the peripheral portion of the uppermost plate B1 is lifted to the lower surface of the guide plate 4. Adsorbed. That is, the peripheral portion of the uppermost plate B1 is separated from the second and subsequent plates. At the same time, in order to supply air to the boundary between the uppermost plate B1 and the second plate, the oil film at the plate end and the plate boundary can be blown off by wind force to weaken the adhesion between the plates, Separation of the uppermost plate B1 is promoted.

(Second step)
In the second step, the central portion of the uppermost plate B1 is sucked and transported by the vacuum cup 2 of the transport means 1. In this way, the central portion of the uppermost plate B1 whose peripheral portion is adsorbed to the lower surface of the guide plate 4 in the first step is adsorbed by the vacuum cup 2 so that the central portion of the uppermost plate B1 is also separated. In addition, only the uppermost plate B1 can be easily separated.

  Hereinafter, experimental examples in which the effects of the separation and conveyance device for aluminum plate and the separation and conveyance method according to the present invention have been confirmed will be described. In this experimental example, when there is no guide plate, when the air nozzle is fixed, the distance L between the lower surface of the guide plate and the upper end of the injection port, the length h in the height direction of the injection port of the air nozzle, and the relationship between the occurrence of double blanks The experiment was conducted.

  In addition, the case where there is no guide plate refers to the case where the guide plate of the separation conveying apparatus of the present invention shown in FIG. 1 is excluded. In the case of fixing the air nozzle, the air nozzle (air blow) does not move up and down in conjunction with the transport means, and the air nozzle includes the uppermost plate as in the separation transport device according to the prior art shown in FIG. It refers to the case where air is supplied over a wide range (from the uppermost plate to about 50 mm below the uppermost plate) on the side surface of the laminated aluminum plate. The main experimental conditions in this experimental example are as follows.

(Experimental conditions)
Guide plate: Iron plate (coated with oil-resistant resin on the contact surface side with the aluminum plate)
Guide plate thickness: 1 mm
Distance d between side surface of laminated aluminum plate and air nozzle: 10 mm
Guide plate width W: 40 mm
Overlap length of guide plate and top plate A: 50mm
Distance L between the lower surface of the guide plate and the upper end of the injection port: 0 to 3 mm
Length h in the height direction of the air nozzle outlet: 0.2 to 3.0 mm
Aluminum plate thickness t: 1mm
Aluminum plate area: 500mm x 500mm
Rust prevention oil (rust prevention cleaning oil): “Preton (registered trademark) R-303P (viscosity: 4.0 × 10 ⁻⁶ m ² / s (4.0 sSt), 40 ° C.) manufactured by Sugimura Chemical Co., Ltd.”
Coating amount of rust preventive oil: 0.3 to 1.0 g / m ²

  In this experiment, the uppermost plate of the laminated aluminum plate was lifted 10 times, and the number of times that a double blank in which two or more plates were in close contact with each other was measured. First, Table 1 shows the experimental results when the guide plate is not used and the air nozzle is fixed.

  Referring to Table 1, when there is no guide plate and when the air nozzle is fixed, a double blank always occurs regardless of the amount of rust preventive oil applied and the length h in the height direction of the air nozzle injection port. I understand that.

  Next, Table 2 shows the experimental results when the guide plate is provided and the air nozzle is lifted without being fixed.

  Referring to Table 2, the distance L between the lower surface of the guide plate and the upper end of the injection port is 2t ≧ L (0 to 2.0 mm) with respect to the thickness t (1 mm) of the aluminum plate, By setting the length h in the height direction to 2t ≧ h ≧ 0.5t (0.5 to 2.0 mm), it can be seen that no double blank occurs regardless of the amount of rust preventive oil applied. . Moreover, it turns out that the frequency | count of a double blank can be reduced rather than the case where there is a guide plate and it lifts without fixing an air nozzle without fixing a guide plate and an air nozzle.

  Therefore, according to these results, the distance L between the lower surface of the guide plate and the upper end of the injection port and the length h in the height direction of the injection port of the air nozzle are within a predetermined range as in the present invention. It was revealed that double blanking can be properly prevented.

  Thus, as has been clarified in this experimental example, according to the aluminum plate separating and conveying apparatus and the separating and conveying method according to the present invention, the uppermost plate can be easily separated as compared with the conventional apparatus and method. The top plate can be reliably separated and transported even under conditions where the amount of rust preventive oil applied is relatively large and double blanks are likely to occur.

  As described above, the aluminum plate separating and conveying apparatus and the aluminum plate separating and conveying method according to the present invention have been specifically described by the embodiments and examples for carrying out the invention, but the gist of the present invention is limited to these descriptions. And should be construed broadly based on the claims. Needless to say, various changes and modifications based on these descriptions are also included in the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Conveyance means 2 Vacuum cup 3 Separation means 4 Guide plate 5 Air nozzle 5a Injecting port 6 Frame member 10 Separation conveyance device 20 Conveyance means 30 Vacuum cup 40 Air blow 50 Scratch plate 100 Separation conveyance device A Guide plate and uppermost plate Overlap length B Laminated aluminum plate B1 Uppermost plate d Distance between side surface of laminated aluminum plate and air nozzle h Length in height direction of injection port S1 Distance between lower surface of guide plate and upper end of injection port S1 Gap S2 predetermined space t thickness of aluminum plate W width of guide plate

Claims (5)

A separating and conveying device for separating and conveying the uppermost plate of a laminated aluminum plate in which aluminum plates for forming automotive panels whose surfaces are coated with anti-rust oil are stacked,
Conveying means comprising a plurality of vacuum cups disposed above the laminated aluminum plate and facing the central portion of the uppermost plate and simultaneously moving up and down;
Separation means disposed opposite to the side surface of the laminated aluminum plate with a predetermined space,
The separating means is provided to be lifted and lowered simultaneously with the vacuum cup,
A guide plate disposed to face the peripheral portion of the uppermost plate and a venturi effect through a predetermined gap;
An air nozzle that supplies air to the gap formed between the guide plate and the uppermost plate and a boundary between the uppermost plate and the second plate;
An apparatus for separating and conveying an aluminum plate, comprising:   The apparatus for separating and conveying an aluminum plate according to claim 1, wherein the separating means is disposed at the tip of a frame member extending from the conveying means to both sides of the laminated aluminum plate.   The distance L between the lower surface of the guide plate and the upper end of the injection port of the air nozzle is in a range of 2t ≧ L with respect to the plate thickness t of the aluminum plate. The separation conveyance apparatus of the aluminum plate as described in 2.   The shape of the injection nozzle of the air nozzle is rectangular, and the length h in the height direction of the injection nozzle of the air nozzle is within the range of 2t ≧ h ≧ 0.5t with respect to the plate thickness t of the aluminum plate. The aluminum sheet separating and conveying apparatus according to any one of claims 1 to 3, wherein the apparatus is for separating and conveying aluminum sheets. The uppermost plate of the laminated aluminum plate in which the aluminum plates coated with rust preventive oil are stacked on the surface using the aluminum sheet separating and conveying device according to any one of claims 1 to 4. Separating by a separating means comprising a guide plate and an air nozzle, and conveying by a conveying means having a vacuum cup,
Supplying air to the boundary between the guide plate and the uppermost plate and the boundary between the uppermost plate and the second plate by the air nozzle;
Sucking and transporting the central portion of the uppermost plate by the transport means; and
A method for separating and conveying an aluminum plate, comprising:

Images