JP5743071B2 - Transport device - Google Patents

Description

  The present invention relates to a conveying device that conveys a workpiece by a plurality of rollers.

  In general, in a press molding line for an outer panel of an automobile, a sheet material as a work is conveyed to a press machine 4 via a destacking device 2, a cleaning device 3, and a conveying device 50 as shown in FIG. First, as shown in FIG. 1A, in the destacking device 2, a plurality of sheet materials 10 stacked on the carriage 6 are sucked one by one by a suction lifter (not shown) and conveyed to the cleaning device 3. To do. Next, as shown in FIG. 1B, in the cleaning device 3, the sheet material 10 cleans dust and the like adhering to the sheet material 10 with cleaning oil, so that an appropriate amount necessary for molding is obtained. The oil passes through the oil cut rollers 11 and 11 and is conveyed onto the conveying device 50 so that only the oil remains. Next, as shown in FIGS. 1C and 1D, the sheet material 10 on the conveying device 50 is temporarily clamped at a predetermined position by the positioning device. The sheet material 10 positioned on the conveying device 50 is sucked and held by the robot 5 and conveyed to the press machine 4.

  Therefore, as shown in FIG. 3, the plurality of rollers 51 provided in the conventional conveying device 50 are formed in an abacus bead shape. Since an appropriate amount of cleaning oil remains in the sheet material 10 carried out from the cleaning device 3, when the sheet material 10 is conveyed to the conveying device 50 without any interval, all of the rollers 51 are disposed. A substantially uniform cleaning oil is always attached to the periphery.

  However, when more than 5 minutes elapse until the next sheet material 10 is carried into the conveying device 50, as shown in FIG. 3 and FIG. The cleaning oil adhering to the entire circumference stays as a lump 55 at the lowermost end. For this reason, as shown in FIGS. 4B to 4D, when the next sheet material 10 is conveyed on each roller 51, a lump of cleaning oil 55 staying at the lowermost end of each roller 51 becomes a sheet. The material 10 is transferred and attached to the material 10. As a result, when the sheet material 10 having a plurality of cleaning oil masses 55 attached thereto is press-molded, there is a risk of so-called oil distortion in which the product is deformed due to the cleaning oil losing its escape when pressed by the mold. In particular, in the outer panel that forms the appearance of an automobile, it is difficult to rework after press molding, and therefore, products with oil distortion are discarded, which causes a big problem of increasing manufacturing costs.

  As a conventional technique proposed to solve this problem, Patent Document 1 discloses that a fluid is ejected toward a side surface of each roller by a fluid ejecting unit and is rotated in a predetermined direction to adhere to each roller. A sheet material conveying apparatus is disclosed in which a centrifugal force is applied to oil to separate the oil from each roller.

JP 2004-35162 A

  However, in the sheet material conveying apparatus according to the invention of Patent Document 1, since the cleaning oil blown off by the fluid ejecting means adheres to the peripheral equipment, the oil distortion of the press-formed product cannot be reliably prevented.

  This invention is made in view of this point, and it aims at providing the conveying apparatus which prevents the transfer to the workpiece | work of the washing oil adhering to a roller, and prevents the oil distortion to a press molded product. To do.

In order to solve the above-mentioned problems, the roller provided in the conveying device of the present invention is formed in a columnar shape, and the roller is arranged so that its axial direction is inclined with respect to the lower surface of the workpiece, The outer peripheral edge of one end in the axial direction of the roller is brought into contact with the work to support the work, and the other end in the axial direction of the roller is made non-contact with the work.
Thereby, the transfer of the cleaning oil adhering to the roller to the workpiece can be prevented, and the oil distortion to the press-formed product can be prevented.
Various aspects of the transport device of the present invention and their functions will be described in detail in the section of the aspect of the invention below.

(Aspect of the Invention)
In the following, some aspects of the invention that can be claimed in the present application (hereinafter sometimes referred to as “claimable invention”) will be exemplified and described. In addition, each aspect is divided into a term like a claim, it attaches | subjects a number to each term, and is described in the format which quotes another term as needed. This is for the purpose of facilitating the understanding of the claimable invention, and is not intended to limit the combinations of the constituent elements constituting the claimable invention to those described in the following sections. In other words, the claimable invention should be construed in consideration of the description, embodiments, etc. accompanying each section, and as long as the interpretation is followed, there may be embodiments in which other constituent elements are added to the aspects of each section. In addition, an aspect in which the constituent elements are deleted from the aspect of each item can be an aspect of the claimable invention .

(1) A conveying device that conveys a work by a plurality of rollers, wherein the rollers are formed in a columnar shape, and the rollers are arranged so that the axial direction thereof is inclined with respect to the lower surface of the work, The conveying device according to claim 1, wherein the outer peripheral edge of one end in the axial direction of the roller is in contact with the work to support the work, and the other end in the axial direction of the roller is not in contact with the work . Equivalent to the invention) .
In the transport device of item (1), the work is transported while coming into contact with one end of the roller in the axial direction, but the cleaning oil from the work is retained at the other end in the axial direction of the roller that is not in contact with the work . The transfer of the cleaning oil to the surface of the workpiece is prevented.

( 2 ) The conveying device conveys the work carried out from the cleaning device, and the tilt angle of the roller is set based on the viscosity of the cleaning oil used in the cleaning device. (1) The transfer apparatus according to item (corresponding to the invention of claim 2) .
( 3 ) The conveying apparatus according to ( 2 ), wherein an inclination angle of the roller with respect to the workpiece is set to 20 ° with respect to a viscosity of 3 mm ² / s at 40 ° C. of the cleaning oil.
In the conveyance devices of the items ( 2 ) and (3), since the optimum inclination angle with respect to the viscosity of the cleaning oil is set, the transfer of the cleaning oil to the surface of the workpiece is further prevented.

  ADVANTAGE OF THE INVENTION According to this invention, the transfer apparatus which prevents the transfer to the workpiece | work of the cleaning oil adhering to a roller, and prevents the oil distortion to a press molded product can be provided.

FIG. 1 is a diagram showing a usage pattern of a transport apparatus according to an embodiment of the present invention. FIG. 2 is a front view showing a roller employed in the transport apparatus. 3A and 3B show rollers employed in a conventional conveying device, where FIG. 3A is a side view and FIG. 3B is a front view. FIG. 4 is a diagram illustrating a state in which a lump of cleaning oil staying on a roller is transferred to a sheet material in a conventional conveyance device.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to FIGS. 1 and 2.
As shown in FIG. 1, the transport device 1 according to the embodiment of the present invention is used in a press molding line, and is disposed between the cleaning device 3 and the press molding machine 4. The sheet material 10 as a workpiece cleaned by the above is conveyed toward the press molding machine 4.
The conveying apparatus 1 according to the embodiment of the present invention is configured by providing a plurality of roller rows in which a plurality of rollers 15 are provided at predetermined intervals.

As shown in FIG. 2, each roller 15 has a circumference through which the apex of the roller 15 in contact with the surface of the sheet material 10 and a circumference through which the lowest point of the roller 15 passes do not exist on the same circumference. It is configured differently.
Specifically, each roller 15 includes a shaft 15b and a cylindrical body 15a that is rotatably supported by the shaft 15b. The shaft 15b is supported by a support member (not shown). Each roller 15 is arranged at a predetermined angle θ with respect to the vertical direction on either the left or right side with respect to the conveying direction of the sheet material 10. In other words, each roller 15 is arranged such that its axial direction is inclined at a predetermined angle θ with respect to the lower surface of the sheet material 10. As a result, now 20 (circumference through which the apex of the cylindrical body 15a of the rollers 15) axial end outer peripheral edge of the cylindrical body 15a of each roller 15 contacts the surface of the sheet member 10, whereas, the cylindrical body 21 (circumferential lowermost point of the cylinder 15a passes through the rollers 15) the outer periphery of the other axial end of the 15a is to pass through the lowest point of the rotation locus of the cylindrical body 15a, and the surface of the sheet material 10 Contactless.
The cylindrical body 15a may be a solid body or a hollow body.

The inclination angle θ of the roller 15 is set to an optimum angle based on the viscosity of the cleaning oil used in the cleaning device 3. In the present embodiment, the inclination angle θ of the roller 15 is set to 20 ° with respect to the viscosity of the cleaning oil at 40 ° C. of 3 mm ² / s (oil density is 0.83 g / cm ² at 15 ° C.). In the present embodiment, the width of the cylindrical body 15a is set to a predetermined value within a range of 7 mm to 11 mm, preferably 9 mm.

Next, the operation of the transport device 1 according to the embodiment of the present invention will be described.
The sheet material 10 carried out from the cleaning device 3 is conveyed on each roller 15 of the conveying device 1. The sheet material 10 is in contact with the outer peripheral edge 20 on one end side in the axial direction of the cylindrical body 15 a of each roller 15. Be transported.
Therefore, once the conveyance of the sheet material 10 is stopped, the cleaning oil adhering to the outer peripheral edge 20 on the one axial end side of the cylindrical body 15a of each roller 15 becomes the outer peripheral edge 21 on the other axial end side of the cylindrical body 15a. It stays as a lump 55 at the lowest point.

  Then, when the next sheet material 10 is carried into the conveying device 1 from the cleaning device 3 at intervals, the next sheet material 10 comes into contact with the outer peripheral edge 20 on one end side in the axial direction of the cylindrical body 15a of each roller. While being conveyed. However, at this time, the cleaning oil staying as the lump 55 at the lowermost point of the outer peripheral edge 21 in the axial direction of the cylindrical body 15a of each roller 15 is along the outer peripheral edge 21 on the other axial end side of the cylindrical body 15a. Therefore, the cleaning oil 55 does not transfer to the sheet material 10. Thereafter, the cleaning oil 55 naturally falls from each roller 15.

As described above, the conveying apparatus 1 according to the embodiment of the present invention, each rollers 15, the axial direction is disposed inclined at a predetermined angle θ for the sheet material 10, the vertex of the rollers 15 Since the outer peripheral edge 20 on one end side in the axial direction passing through contacts the surface of the sheet material 10, the outer peripheral edge 21 on the other end side in the axial direction through which the lowest point of each roller 15 passes is not in contact with the surface of the sheet material 10 . The cleaning oil 55 staying along the outer peripheral edge 21 on the other axial end side of each roller 15 does not transfer to the sheet material 10.
Thereby, when the sheet | seat material 10 is press-molded, it can prevent that an oil distortion arises.

  DESCRIPTION OF SYMBOLS 1 Conveying device, 10 Sheet material (workpiece), 15 Roller, 15a Cylinder body, 20 Outer peripheral edge on one end side in the axial direction (circumference through which the top of the cylindrical body of the roller passes), 21 Outer peripheral edge on the other end side in the axial direction (Roller The circumference through which the lowest point of the cylinder of

Claims (2)

A conveying device that conveys a work by a plurality of rollers,
The roller is formed in a cylindrical shape,
The roller is arranged so that its axial direction is inclined with respect to the lower surface of the workpiece,
An outer peripheral edge of one end in the axial direction of the roller is brought into contact with the work to support the work, and the other end in the axial direction of the roller is brought into non-contact with the work. The transport apparatus, which carry the carried out from the washing apparatus work, claim 1, characterized in that the inclination angle of the roller on the basis of the viscosity of the washing oil used in the cleaning device is set The conveying apparatus as described in.

Images