JPH08641B2 - Adsorption transfer device for articles - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction and transfer device for transferring a sheet-shaped or other shaped article between different one-point positions with a simple mechanism and at high speed and high accuracy.

[0002]

2. Description of the Related Art When a sheet-shaped article or an article having a certain thickness is transferred between two different positions from a supply position of a product to a dispensing position, as shown in FIG. 6, it rotates between these two positions. The suction table is rotatably arranged on the main shaft, the article is sucked at the supply position, the article is sucked and moved by the rotation of the suction table, and the article is paid out at the payout position. The suction table is fixed to the main shaft by projecting.

[0003]

The suction table, which is provided so as to project from the main shaft and rotates together with the main shaft, depends on the size of the suction article.
A flat suction surface having a certain length and width is provided. Therefore, when the suction table rotates about the main shaft, the rotation locus differs between the central portion and the end portion of the suction surface, and generally the rotation locus of the central portion of the suction surface closest to the center of the spindle. Has a small radius and a large radius at the end. Therefore, at the supply position for adsorbing the article, the gap between the article ejection port and the adsorption surface is set so that the end of the adsorption table does not contact the article ejection port.
The gap is set large so as not to be on the line of rotation of the suction end. For this reason, a suction error of the article may occur. Further, in order to solve this suction error, a suction table moving device is separately provided so that the suction table is located near the article outlet at the article outlet position only when the article is sucked. For this reason, the apparatus becomes complicated and the number of operations of the suction table at the article suction position increases, so that there is a limit to high-speed transfer.

It is an object of the present invention to simplify the mechanism and carry out the transfer reliably and at high speed without causing a suction error.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and an eccentric shaft eccentric to a main shaft together with a planetary gear is provided with an adsorption table having an adsorption hole and an adsorption surface on its outer peripheral surface. In addition to supporting above, a planetary gear is fitted and meshed with the internal gear, and a valve that selectively connects and disconnects a vacuum source to the eccentric shaft according to the rotation angle of the adsorption base is supported. , A part of this valve and an internal gear are swingably locked, and a plurality of stations are arranged on the outer peripheral side of the rotation locus of the suction table to suck and transfer the articles between the stations. What is done is the gist.

[0006]

The function is to support the adsorption base, which rotates together with the planetary gear that revolves in the internal gear with its revolution, on the same eccentric shaft. The eccentric shaft is eccentric to the main shaft within a predetermined range, and adsorption is performed. Since the table is supported so that it can be swung, the gap between the station and the suction table can be reduced even when articles are transferred between any of a plurality of stations arranged on the outer peripheral side of the suction table. A reliable article transfer can be performed at high speed without causing a suction error.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An adsorption transfer device for articles according to the present invention will be described below with reference to the illustrated embodiments. In the figure, reference numeral 1 denotes a main shaft, which is rotatably driven according to the transfer speed of articles and can be adjusted as necessary. An eccentric shaft 2 is provided at the tip of the main shaft 1 so as to rotate together with the main shaft 1. Move. The amount of eccentricity between the main shaft 1 and the eccentric shaft 2 is determined so as to be one half of the number obtained by subtracting the planet gear diameter from the internal gear diameter described later.

The valve 3 is instructed to the eccentric shaft 2 via a bearing (not shown) so as to rotate freely with respect to the eccentric shaft 2, and also to rotate together with the eccentric shaft 2. A planetary gear 7 and a suction table 8 are also provided.

The planetary gear 7 has a required number of teeth formed on its outer peripheral surface and is fixed through the eccentric shaft 2 at the center thereof.
An internal gear 6 is fitted on the outer periphery of the planetary gear 7, and some of the teeth formed on the inner peripheral surface and some of the teeth of the planetary gear mesh with each other, so that the planetary gear 7 is concentric with the main shaft 1. Some internal gear 6
Along with the inner peripheral surface of the, it is configured to rotate while changing its meshing teeth.

Further, a suction table 8 is fitted to the eccentric shaft 2 directly on the planetary gear 7 or via a spacing piece 9 and rotates together with the eccentric shaft 2 and the planetary gear 7. The suction table 8 is shown in the drawing. It can be a quadrangle, a circle, or the like. In the embodiment shown in FIGS. 1 to 3, the suction table 8 has a quadrangular shape, and suction holes 11, 11, 11 ... Are punched in the respective outer side surfaces thereof, and the side lengths of the respective outer side surfaces are suctioned. The length should be approximately equal to or slightly longer than the length of the article.

The suction holes 11 formed on the respective outer side surfaces of the suction table 8 are provided at the valve 3 at a certain rotation angle of the suction table 8.
In order to selectively conduct electricity to the vacuum hole 14 and the compressed air hole 15 provided in the suction hole 8, the suction hole 8, the spacing piece 9, and the guide hole 12 penetrating the inside of the planetary gear 6, the suction hole 8 is provided. Within a predetermined angle range, the valve 3 is provided with a semicircular arc-shaped vacuum groove 13 on the sliding surface side with the planetary gear so as to be constantly connected to the vacuum hole 14. A part of this vacuum groove 13 is used as the vacuum hole 1
Make it conductive to 4.

A holding lever 4 is projectingly provided on the valve 3. A supporting shaft 5 is provided at the tip of the holding lever 4 to lock the holding lever 4 and the internal gear 6, and the supporting shaft 5 is used as a center. The valve 3 provided on the base end side of the holding lever 4 is swung within a predetermined angle.

Stations, that is, article supply positions and delivery positions, or working positions are provided along the outer peripheral surface of the suction table 8, and the number of stations and the number of suction surfaces of the suction table 8 having suction holes are determined. The ratio should be at least 2: 1 but this should be 3: 1, 3: 2, 4: 1, 4: 3, 5: 2, 5: 4.
6: 5, 6: 3, etc. can be freely selected.

Further, the number of teeth of the planetary gear 7 and the internal gear 6 is determined such that the greatest common divisor is an integer, and suction holes of the same number as the greatest common divisor of the planetary gear are provided on the suction table. And The valve 3 includes a planetary gear 7 and a planetary gear 7
Are respectively slidably attached to the suction table 8 and the suction holes 1
1, the guide hole 12, the vacuum groove 13, the vacuum hole 14, and the compressed air hole 15, respectively, so as to be electrically connected or cut off, respectively, so that airtightness is not impaired by the sliding surfaces thereof, they are respectively installed in pairs. A pressing means or packing is adopted as needed.

Next, the operation of the transfer device constructed as described above will be described with reference to the operation explanatory view of FIG.
An article take-out port is provided at the station A position and a payout position is provided at the station B position on the outer peripheral portion of the suction table 8,
When the article is transferred from the station A to the station B, the internal gear is fixed, and the planetary gear 7 is revolved by the drive of the main shaft 1 by the eccentric shaft 2 in the arrow direction of FIG.
Due to the meshing with the internal gear 6, the planetary gear 7 also rotates in the counterclockwise direction at the same time. The outer surface 8A of the suction table at the position of the station A is in a state of being in parallel with the article take-out port, and the suction hole 11 thereof is connected to the vacuum hole 14 through the vacuum groove 13 and is sucked by the vacuum source to suck the article. It is ready. At this time, when the article is supplied from the article outlet of the station A, the article is adsorbed by the adsorption hole and comes into close contact with the outer surface 8A.

The planetary gear 7 revolves in the counterclockwise direction while revolving around the main shaft 1 and rotates from the state of FIG. 3 (1) to the states of (2), (3) and (4) of FIG. When the outer side surface A reaches the payout position of the station B, the suction hole 11 has been connected to the vacuum source through the vacuum groove 13 and the vacuum hole 14 so far, so that the article is transferred to the outer side surface A by suction. However, there is no vacuum groove 13 at the position of station B, the suction hole 11 is connected to the pressure hole 15 to release the suction of the article, the article is discharged at the station B, and the transfer from the station A to the station B is performed. .

When the outer surface 8A reaches the station B, the next outer surface 8B reaches the position of the station A, and then the article is supplied from the station A to the outer surface 8B to be adsorbed. As the planetary gear revolves once in this way, the planetary gear rotates only at a predetermined angle, that is, the adjacent outer surface suction holes reach the station A. This operation is sequentially repeated so that the articles are transferred from the stations A to B.

By the rotation and revolution of the planetary gear,
The suction table 8 also rotates together, but at the station A position, the suction table side surface is inclined with respect to the outlet, but since the suction table is also supported by the support shaft 5 so as to be swingable, Suddenly swings at the position, and the side of the suction table and the outlet become parallel.

In the embodiment shown in FIGS. 4 and 5, the suction table has five outer peripheral side surfaces, and six stations are provided in the outer peripheral direction. The operation and the like are the same as those shown in FIGS. Therefore, detailed description thereof will be omitted.

[0020]

According to the adsorption transfer device for articles of the present invention, an adsorption table having adsorption holes and adsorption surfaces on its outer peripheral surface is supported together with a planet gear on an eccentric shaft that is eccentric with respect to the main shaft, and the planet gear is inside. A valve that selectively engages and disconnects a vacuum source to the eccentric shaft according to the rotation angle of the suction table is supported on the eccentric shaft by fitting and meshing with the eccentric shaft. Since the and are swingable and locked, and a plurality of stations are arranged on the outer peripheral side of the rotation path of the suction table so that the articles can be sucked and transferred between the stations. There is an advantage that the space between the station for carrying out the work and the suction table can be made narrow, the suction transfer of the article can be performed reliably, and the speed can be increased.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of an adsorption transfer device for articles according to the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is an explanatory diagram of the same operation sequence.

FIG. 4 is a front view of a different embodiment.

FIG. 5 is a plan view of the same.

FIG. 6 is an explanatory diagram of a known example.

[Explanation of symbols]

 1 Spindle 2 Eccentric Shaft 3 Valve 4 Holding Lever 5 Support Shaft 6 Internal Gear 7 Planetary Gear 8 Suction Table 11 Suction Hole A, B Station

Claims (1)

[Claims] 1. A suction table having suction holes and a suction surface on its outer peripheral surface is supported together with a planetary gear on an eccentric shaft that is eccentric with respect to a main shaft, and the planetary gear is fitted and meshed with an internal gear. The eccentric shaft supports a valve that selectively connects and disconnects a vacuum source to the adsorption table according to the rotation angle of the adsorption table, and locks a part of the valve and the internal gear so that they can swing. Further, the plurality of stations are arranged on the outer peripheral side of the rotation track of the suction table, and the article is sucked and transferred between the stations by suction.