JP4050101B2 - Adsorption type transport device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a suction-type transport device suitable for sucking and transporting a disk such as a CD or DVD made of an optical disk by a negative pressure action, and in particular, eliminates a suction mark generated when the disk is sucked, It is intended to prevent uneven printing in the printing process on the disc label surface.
[0002]
[Prior art]
For example, in a manufacturing process of a disk such as an optical disk, a method of sucking and transporting a disk with a suction pad as a negative pressure is generally widely used as a transporting means for the manufactured disk.
[0003]
FIG. 4 shows a cross-sectional view of an example of a disk transport device using a conventional suction pad.
Reference numeral 20 denotes a suction head having a shaft 21, and a head plate 22 is joined to the suction head 20 in a sealed manner by bolts 23 to form a negative pressure chamber 24 therein. A negative pressure pipe 25 is connected to the suction head 20.
[0004]
A plurality of (four in this example) suction pads 26 made of silicon rubber are attached to the head plate 22 of the suction head 20 described above, and the negative pressure holes 26 a of these suction pads 26 are formed in the negative pressure chamber 24 of the suction head 20. Communicate. Reference numeral 27 denotes a disk placed on the tray 28.
[0005]
In the disk transport device configured as described above, the suction pad 26 is brought into contact with the disk 27 to be transported, and the suction pad 26 has a negative pressure from the negative pressure pipe 25 through the negative pressure chamber 24 of the suction head 20. By doing so, the disk 27 is sucked and the disk 27 is conveyed to a predetermined position by the movement of the suction head 20. Thereafter, the suction by the negative pressure of the suction pad 26 is released, and the suction head 20 returns to the disk suction position again.
[0006]
[Problems to be solved by the invention]
By the way, in the method of transporting the disk using the suction pad 26, there is a problem that the defect described below occurs in the disk. That is, a so-called circle-shaped white suction mark having a pad shape remains on the surface of the disk sucked by the suction pad 26. When the label printing is performed on the screen as a subsequent process of the disk, the presence of the suction mark causes pad-shaped printing unevenness on the disk, which impairs the commercial value of the disk.
[0007]
Here, the occurrence of uneven printing due to sticking marks and sticking marks remaining on the disc is not constant and does not always cause a problem, but it sometimes occurs in large quantities depending on the type of label printing pattern and printing ink, etc. Every time the suction surface of the suction pad was cleaned. However, the cleaning of the suction pad is only a temporary measure, and the frequent stoppage of the conveying device during operation has caused a decrease in the operation rate.
[0008]
In addition, installing an inspection machine that can detect suction marks and printing unevenness has many technical and economic problems, which may cause the appearance of discs with poor appearance. Then, it is necessary to inspect all the disks by visual recognition of the worker, which is a heavy burden on the worker.
[0009]
In addition, it is considered that the silicon content of the suction pad itself is transferred to the disk surface as one of the causes of suction marks and printing unevenness. This is said to be due to the fact that silicon floating on the surface of the printing ink is transferred due to the strong adhesion and rubbing of the suction pad, which has an adverse effect on the disk appearance. Is essential as a component of printing ink.
[0010]
The present invention has been made in order to solve the above-described problems, and an object of the present invention is to obtain a suction-type transport device that eliminates disk suction marks and prevents uneven printing on the disk label surface.
[0011]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, an adsorption type conveying apparatus according to the present invention is provided with an adsorption conveyance main body portion having a negative pressure chamber therein and a suction conveyance main body portion spaced apart from each other, and a plurality of negative pressure passages. a disk-shaped suction head having a smooth suction surface provided, mounted so as to cover the entire suction surface, a disk-shaped suction sheet consisting of rubber having a plurality of negative pressure passage and communicating with the suction holes, the suction The other of the conveyance main body and the suction head are connected to one tube holder whose one end communicates with the negative pressure chamber of the adsorption conveyance main body and the other end is provided on the adsorption head and communicates with the adsorption hole of the adsorption sheet. And a tube also serving as an elastically deformable negative pressure pipe having a cushion function so as to be connected to the tube holder . Further, a warped part that is warped in a direction away from the suction conveyance object for facilitating the separation of the adsorption conveyance object from the adsorption surface is provided on the outer peripheral portion of the adsorption head .
[0012]
According to the above-described suction-type transport device, the suction sheet together with the suction head comes into surface contact with the transported object, for example, the disk surface, and the suction hole of the suction sheet is set to a negative pressure so that the disk is sucked. Here, since the disk surface and the suction sheet are in surface contact, the suction force is evenly distributed over the entire disk surface, and strong adhesion between the suction surface and the suction sheet does not occur locally. The generation of traces can be prevented, whereby the occurrence of uneven printing on the disc label surface can be eliminated.
[0013]
In addition, since the tube also serving as the negative pressure pipe has a cushion function, the tube can be elastically deformed freely with respect to the parallelism of the disk surface, and the level can be adjusted to enable uniform surface contact with the suction sheet. .
[0014]
DETAILED DESCRIPTION OF THE INVENTION
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of an adsorption transport apparatus according to the present invention will be described with reference to the drawings, taking as an example the case of an optical disk such as a CD or DVD as a transported object.
[0015]
FIG. 1 is a cross-sectional view of the entire suction-type transport apparatus according to the present embodiment, FIG. 2 is a plan view of the suction sheet, and FIG. 3 is a cross-sectional view of a state in which an optical disk is sucked.
[0016]
Reference numeral 1 denotes a head main body having a shaft 2, and the head plate 3 is joined in a sealed manner by a plurality of bolts 4 with a sealing material (not shown) interposed in the head main body 1 which is the suction conveyance main body of the present invention . forming a negative pressure chamber 5 to the head body portion 1. A negative pressure pipe 6 is connected to the head main body 1.
[0017]
An annular suction head 8 is arranged in the head main body 1 with a plurality of (four in this example) equally spaced tubes 7 serving as negative pressure pipes at intervals in the vertical direction. . More specifically, the tube 7 is made of an elastically deformable silicon rubber material having a cushion function, and one tube holder 9 fixed so that the upper end side of each tube 7 protrudes from the lower surface of the head plate 3. It is connected to make surface contact. The tube holder 9 has a negative pressure passage 9 a therein and communicates with the negative pressure chamber 5 of the head main body 1.
[0018]
The lower end side of the tube 7 is connected so as to be in surface contact with the other tube holder 10 fixed so as to protrude from the upper surface of the suction head 8. This tube holder 10 also has a negative pressure passage 10 a inside and communicates with the negative pressure passage 8 a of the suction head 8.
[0019]
Further, the inner peripheral wall of the tube 7 is engaged with the flanges 9b and 10b provided at the opposite ends of the tube holder 9 and the tube holder 10, respectively. It is supported so that it can be suspended.
[0020]
An annular suction sheet 11 having the same outer diameter as that of the suction head 8 and for sucking and transporting the optical disk is fixed to the lower surface of the suction head 8 by a method such as adhesion. The adsorption sheet 11 is made of a fluoro rubber material, and the lower surface of the adsorption sheet 11 is polished smoothly to form an adsorption surface 11a for the optical disk. An adsorption hole 12 communicating with the negative pressure passage 8 a of the adsorption head 8 is opened in the adsorption sheet 11. Incidentally, while the diameter of the optical disk is 12 cm, the diameter of the suction head 8 is 6 cm, and the hole diameter D of the suction hole 12 is 5 mm. That is, in this example, the suction sheet 11 has four suction holes 12 having a hole diameter of 5 mm as shown in FIG. The suction head 8 and the suction sheet 11 are not limited to an annular shape, and may be a disk shape.
[0021]
Further, the suction sheet 11 is formed with a warped portion 13 whose outer peripheral portion is lifted together with the suction head 8 at a predetermined angle θ, for example, a dish shape.
[0022]
FIG. 3 shows the suction state of the optical disk by the suction type conveying apparatus configured as described above. According to this, the suction head 8 is lowered together with the head main body 1, and the suction sheet 11 is brought into surface contact with the optical disk 15 placed on the tray 14 in a slightly pressurized state. At this time, the tube 7 is deformed so that the intermediate portion swells in a beadal shape, for example, as shown in FIG. 3 due to its own elastic deformation action, and the suction sheet 11 is cushioned with respect to the optical disk 15. Touched. Thereafter, when the negative pressure chamber 5 of the head main body 1 is made negative pressure from the negative pressure pipe 6, the suction sheet 11 passes through the negative pressure passage 9 a of the tube holder 9, the tube 7, and the negative pressure passage 10 a of the tube holder 10. The suction hole 12 is made a negative pressure and the optical disk 15 is sucked. Then, the optical disk 15 is transported to a predetermined position by the movement of the head main body 1 in the suction state of the optical disk 15.
[0023]
By the way, in the present invention, the entire surface other than the warped portion 13 of the outer peripheral portion of the suction sheet 11 is brought into surface contact with the optical disk surface, and the optical disk is sucked by the suction holes 12, so that the suction force received by the optical disk is Since the optical disc is evenly distributed over the entire surface, the optical disc does not have strong local contact with the suction sheet 11, and the occurrence of suction marks on the optical disc surface can be prevented. Therefore, since the occurrence of the suction mark on the optical disk surface can be avoided, uneven printing can be eliminated in the subsequent printing process of the disk label surface, and appearance defects of the manufactured optical disk can be prevented.
[0024]
Further, since the suction sheet 11 is formed from a fluoro rubber material and the contact surface with the disk is polished smoothly, even when the suction sheet 11 is lifted after releasing the negative pressure, it is easily peeled off without sticking to the disk. It can be released.
[0025]
Further, by providing the warped portion 13 on the outer peripheral portion of the suction sheet 11, an opportunity to peel the suction sheet 11 is obtained, and the peelability from the disk can be further improved.
[0026]
Further, when the suction sheet 11 comes into contact with the surface of the optical disk 15, the tube 7 that also serves as a negative pressure pipe has a cushion function. Therefore, the tube 7 is elastically deformed and absorbs the optical disk by adjusting the level of parallelism. Thus, the suction sheet 11 can be brought into surface contact with the optical disk surface uniformly.
[0027]
The present invention is not limited to the embodiment described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention.
[0028]
In this example, the case where the number of the suction holes 12 of the suction sheet 11 is four has been described, but the number is not limited. Further, the diameter of the suction hole 12 is not limited.
[0029]
Further, in this example, the case where the suction conveyance object is applied to an adsorption conveyance device for an optical disk such as a CD or DVD has been described. However, the present invention can be widely applied to an adsorption conveyance device for a disk-shaped object such as a CD-R. .
[0030]
Moreover, the present invention can be widely applied to a suction / conveyance apparatus for paper such as a booklet or a label other than a disk-shaped object.
[0031]
【The invention's effect】
As described above, the suction-type transport device according to the present invention is a disc-shaped suction head having a smooth suction surface provided with a plurality of negative pressure passages , spaced from the suction transport main body. The disc-shaped suction sheet, which is attached so as to cover the entire suction surface and has a plurality of suction holes communicating with the negative pressure passage, is connected to the suction transport main body portion and the suction head, and one end side is the suction side. It has a cushioning function that is connected to one tube holder that communicates with the negative pressure chamber of the transport body and has the other end connected to the other tube holder that is provided on the suction head and communicates with the suction hole of the suction sheet. And a tube also serving as an elastically deformable negative pressure pipe. Since the suction head is provided with a warped portion that is warped in a direction away from the suction transported object for facilitating the peeling of the suction transported object from the suction surface on the outer periphery of the suction head . Thus, there is an effect that it is possible to prevent the occurrence of adsorption traces on the surface, and therefore, it is possible to eliminate uneven printing in the subsequent printing process and to prevent the appearance conveyance of the adsorption conveyance object.
[0032]
In addition, since the tube that also serves as the negative pressure pipe has a cushion function, the tube is elastically deformed to absorb the deviation in the parallelism of the adsorbed conveyed product by adjusting the level, and the adsorbing sheet is evenly faced to the adsorbed conveyed product Can be contacted. This means that the suction force received by the suction conveyance object can be evenly distributed over the entire surface of the conveyance object, and therefore, it is possible to prevent the occurrence of adsorption traces on the adsorption conveyance object.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of the overall configuration of an adsorption transport apparatus according to the present invention.
FIG. 2 is a plan view of the suction sheet.
FIG. 3 is a cross-sectional view showing a state where the suction sheet is in surface contact with the optical disc.
FIG. 4 is a cross-sectional view of a conventional suction-type transfer device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Head main-body part, 5 ... Negative pressure chamber, 6 ... Negative pressure piping, 7 ... Tube, 8 ... Adsorption head, 9, 10 ... Tube holder, 9a, 10a ... Negative pressure passage, 11 ... Adsorption head, 12 ... Adsorption Hole, 13 ... Warped up part

Claims (1)

A suction transfer body having a negative pressure chamber connected to the negative pressure pipe;
A disk-like suction head that has a smooth suction surface that is disposed at intervals with respect to the suction conveyance main body and has a plurality of negative pressure passages ;
A disk-shaped suction sheet that is attached so as to cover the entire suction surface , and that is made of rubber and has a plurality of suction holes that communicate with the negative pressure passage ;
The suction conveyance main body and the suction head are connected, and one end side is connected to one tube holder communicating with the negative pressure chamber of the suction conveyance main body, and the other end side is provided in the suction head. A tube that also serves as an elastically deformable negative pressure pipe having a cushion function so as to be connected to the other tube holder communicating with the suction hole of the sheet ,
A suction-type transport device characterized in that, on the outer peripheral portion of the suction head, there is provided a warped part that warps in a direction away from the suction transport object for facilitating the separation of the suction transport object from the suction surface. .

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