JP2742891B2 - Article suction transfer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an article suction and transfer apparatus for transferring a sheet-shaped article between two different positions with high speed and high accuracy.

[0002]

2. Description of the Related Art As shown in FIG. 3, when a sheet or a flat article having a certain thickness is transported between two different positions from an article supply position to a dispensing position, as shown in FIG. A suction table is rotatably arranged on a main shaft which rotates at a predetermined position. The suction table absorbs articles at a supply position, adsorbs and moves the articles by rotation of the suction table, and pays out the articles at a payout position. The suction table is projected and fixed to the main shaft.

[0003]

Therefore, in the conventional apparatus, the suction table protruding from the main shaft and rotating together with the main shaft is
Depending on the size of the suction article, a flat suction surface having a certain length and width is provided. For this reason, when the suction table rotates about the main shaft, the rotation trajectory differs between the central portion and the end portion of the suction surface, and generally, the rotation trajectory of the suction surface central portion closest to the main shaft center. Has a small radius,
The radius of the end increases. Therefore, at the supply position where the articles are sucked, the gap between the article outlet and the suction surface is set so as not to be on the rotation trajectory line of the suction end so that the end of the suction table does not contact the article outlet. doing.
For this reason, if the gap is large, the vacuum source for suction leaks from this gap, which may cause a suction error of the article. Also, in order to solve this suction error, a suction table moving device is separately provided so that the suction table is located at the article take-out position and approaches the take-out port only during the article suction. However, in this system, the apparatus becomes complicated, and the number of operations of the suction table at the article suction position increases, and therefore, the transfer at high speed is limited.

An object of the present invention is to transfer a sheet-like article reliably and at a high speed without causing a suction error.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and comprises an eccentric shaft which is eccentrically rotated by the rotation of a main shaft, and an eccentric shaft fitted to the eccentric shaft. With a valve block that regulates its direction, a planetary gear that is adjacent to the side surface of this valve block, is pressed against by spring pressure, and is rotatably supported on an eccentric shaft. A suction hopper, and an internal gear that meshes with the planetary gears, is concentric with the main shaft, and is fixed to the main body frame. The suction pad of the suction base is rotatable by the rotation of the eccentric shaft. The gist is that it is arranged between the product and the article receiving stand. In addition, a support plate having an eccentric inner hole is rotatably supported via a bearing in the planetary gear meshed with the internal gear, and the support plate is attached to the internal gear. And

[0006]

The planetary gears are provided on an eccentric shaft which is disposed opposite to each other and rotates with a predetermined amount of eccentricity with respect to the main shaft between the supply hopper and the article cradle with respect to the main shaft. The suction block with the suction pad provided on the planetary gear is provided so that it can be replaced. Close to each other and turn between the two points to reduce the gap between the suction pad and the lower surface of the hopper,
It is possible to reliably transfer articles at a high speed without causing a suction error. In addition, a support plate having an eccentric inner hole is rotatably supported via bearings in the planetary gear meshed with the internal gear. Nature can be secured.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an apparatus for adsorbing and transferring articles according to the present invention. In the figure, H is a supply hopper storing a large number of sheet-shaped articles, and article receiving trays T for receiving articles are respectively arranged facing the supply hopper H, and are supported on the main body frame F. The article suction and transfer device of the present invention is disposed between the article receiving tables T.

[0008] The supply hopper H is attached to a gantry (not shown) to accumulate sheet-like objects formed in a previous step. The size is made slightly larger than the sheet, and the lower part is equipped with nails that prevent the sheet from falling and that can be easily taken out. This hopper has a structure that can be changed with one touch according to the size of the sheet.

The drop hopper of the article receiving table T is incorporated in a drop hopper mechanism, and is mounted at a position opposite to the suction table on the axis of the drop gear 30, receives the sheet drop, and is rotated by the drop gear. Then, it is dropped and supplied to the next process. The drop gear is rotated by another (not shown) drive source in response to a command confirming that a predetermined number of sheet-like objects have been accumulated, and drops the sheet to the lower portion.

In this article suction and transfer apparatus, a main body frame F of the article suction and transfer apparatus is provided with a bearing frame B having bearings, so that the main shaft 1 is cantilevered, and two-point support is provided by bearings. In addition to being freely supported, a power transmission mechanism 2 such as a pulley, a sprocket wheel, and a gear is provided at the outer end of the main shaft so that the power transmission mechanism 2 is driven to rotate in accordance with the transfer speed of the article and can be adjusted as necessary. An eccentric plate 3 is fixed to the tip of the main shaft 1.
Rotates with the main shaft 1, and the eccentric plate 3 has an eccentric shaft 4
The amount of eccentricity between the main shaft 1 and the eccentric shaft 4 via the eccentric plate 3 is determined so as to be a predetermined value, and the eccentric plate 3 further includes a bearing 5 on its outer periphery. And is rotatably supported by the bearing frame B.

The eccentric shaft 4 supports a valve block 6, a planetary gear mount 7 and a suction mount 8 via bearings. The rotation of the main shaft 1 causes the valve block 6 to rotate around the outer periphery of the main shaft according to the amount of eccentricity of the eccentric shaft 4.
In order to keep the direction of the valve block 6 constant even during this eccentric rotation, a floating shaft 9 is protruded from the valve block 6,
A thrust bearing 10 of a sliding body 11 is slidably fitted to the floating shaft, and the sliding body 11 is pivotably supported on a support shaft 12 projecting from the main body frame F. Thus, when the valve block 6 is eccentrically rotated, the floating shaft 9 is slid in the vertical direction while rotating left and right in accordance with the eccentric rotation to keep the direction of the valve block constant.

The valve block 6 is supported on the eccentric shaft 4 via a bearing inside, and a spring S is interposed in the inner hole of the valve block.
Is supported on a part of the eccentric shaft and the other end is supported on the valve block, and this resilient force is applied to the valve block 6 to press against the end face of the planetary gear mounting base 7 to thereby mount the valve block 6 and the planetary gear. Vacuum leakage between the vacuum holes 60 and 70 formed in the base 7 so as to conduct each other is prevented. The valve block 6 is provided with a vacuum connection port 14, which is connected to a vacuum source via a vacuum hose or the like.

A vacuum hole 60 provided in the valve block 6 is a vacuum hole, and is formed in a groove shape along a circle having a central axis in the valve block, and has a structure in which a part is left unground. One end is open to the outside and faces the vacuum port of the planetary gear, the other end is closed and connected to the vacuum connection by a hole leading to the outside, and the compressed air hole is passed through the remaining part of the grinding so that the sheet is dropped by air pressure. It may be.

The planetary gear 7 rotatably supported by the eccentric shaft 4 via a bearing has a required number of teeth formed on its outer peripheral surface, and the boss portion at the center penetrates the eccentric shaft 4. The planetary gear 7 is rotatably supported via a bearing, and the outer circumference of the planetary gear 7 has an internal gear 1 having a diameter larger than the inner diameter of the planetary gear 7.
6, a part of the teeth formed on the inner peripheral surface of the internal gear 16 and a part of the teeth of the planetary gear mesh with each other to form the planetary gear 7.
Is rotated eccentrically along the inner peripheral surface of the internal gear 16 concentric with the main shaft 1 while changing the positions of the meshing teeth.

An eccentric disk-shaped support plate 15 is fitted to the outer peripheral portion of the planetary gear mount 7 via a bearing, and a bearing is also fitted to the outer peripheral portion of the support plate 15 so as to be fitted to the internal gear. It is rotatably supported by the provided bearing support 19.

The internal gear 16 is supported via a plurality of supporting beams 18 protruding from the main body frame F, so that the internal gear is fixed to the main body frame.

Further, a suction table 8 is directly fixed to the outer surface of the boss portion of the planetary gear 7 so as to rotate together with the planetary gear 7 about the eccentric shaft 4.

The suction pad 81 protruding from the outer surface of the suction table 8 is provided on one side of the suction table, and when the eccentric shaft is at the top dead center, the suction pad 81 faces upward and the lower position of the supply hopper is positioned. At the bottom of the eccentric shaft rotated by 180 degrees from the top dead center position, the suction pad is directed downward so as to suck the article at the lowermost position of the supply hopper. Then, the suction moving article is placed on the article receiving table. This is because the position of the vacuum hole between the valve block and the planetary gear mount coincides or disagrees due to the rotation of the main shaft, which closes or opens the vacuum hole to open and close the valve. When the sheet 81 is upward, the sheet-like article is sucked from the supply hopper, and is moved downward by the rotation of the eccentric shaft 4 and the suction table 8 to be downward. When the sheet article is opposed to the article receiving table, the suction is released. The sheet-like article is transferred onto a receiving table.

Below the supply hopper H, an article receiving table T provided with the suction table 8 interposed therebetween is provided with a drop gear 30 and a shaft 31 and a drop hopper 32 for transmitting external power.
The falling gear is rotated by a command from a control mechanism (not shown), and the integrated sheet in the hopper is dropped to the next step. This mechanism has a structure that can be replaced and changed with one touch according to the size of the sheet.

The suction table 8 is connected to a planetary gear mounting table and can be easily replaced. The shape of the suction table is a number determined by the ratio of the number of teeth between the internal gear and the planetary gear. It has a flat part, and the suction port is 1 to
Several holes are formed, one end of which is connected to the suction port of the planetary gear mount, and the other end of which is connected to the suction pad near the closed portion. At the suction port, a hole is formed inside the suction table in the axial direction along the circumference thereof in accordance with the number of suction pads, one end is closed and the other end is released facing the suction port of the planetary gear mounting base, A pad mounting hole is provided near the closed mouth.

The suction pad 81 is made of a rubber material.
One end is open to the outside to suck the sheet,
The other end is fixed to a suction table and connected to a suction port formed in the suction table, and the number thereof is one to several per sheet depending on the shape and weight of the sheet.

Next, the operation of the suction / transport apparatus for articles configured as described above will be described. Sheet-like articles are continuously supplied to the supply hopper H from a pre-process not shown. In this state, the external drive source is rotated, and the external vacuum source is connected to the vacuum connection port 14. As the main shaft 1 rotates, the planetary gear 7 rotates (rotates) around the eccentric shaft while meshing with the internal gear 16, and the planetary gear mounting base and the suction base 8 rotate together. When the suction pad 8 moves up and down by the rotation of the suction table 8 and the suction pad 81 comes directly below the supply hopper H, the pad functions as a vacuum (passes from the vacuum connection port through the vacuum hole and the vacuum port to the pad). Sucks one sheet. When the pad comes on the lower receiving tray T, the valve closes and the seat falls on the receiving tray T. Air pressure may be applied when falling.

At this time, the valve block 6 attempts to rotate due to the rotation of the eccentric shaft 4, but is restricted by the floating shaft 9, so that the valve block 6 moves up and down while slightly rotating left and right. The spring S constantly presses against the side surface of the planetary gear mounting base, so that the movement is made to communicate with the suction port 70.

At this time, the support plate 15 rotates via the upper bearing in accordance with the revolution of the eccentric shaft 4 about the main shaft 1, and the planetary gear 7 rotates via the lower bearing. This support plate has a considerable weight and is an indispensable mechanism for holding the suction table rotating at high speed.

[0025]

According to the present invention, the suction table provided with the suction pad so as to rotate eccentrically with respect to the main shaft is rotatably supported between the supply hopper and the article receiving table. Therefore, there is an advantage that the gap between the supply hopper and the suction pad can be made as small as possible, the sheet-like article can be reliably sucked by the pad, and the transfer efficiency can be increased. In the article suction and transfer device of the second invention, a bearing is provided inside the internal gear and a bearing is provided on the outer periphery of the planetary gear mounting base to which the suction base is mounted, and a support plate is held between the two bearings. Therefore, there is an advantage that the driving portion is covered by this support plate, and safety in operation can be achieved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an embodiment of an apparatus for adsorbing and transferring an article of the present invention.

FIG. 2 is an explanatory diagram of an embodiment in which the device is disposed symmetrically.

FIG. 3 is an explanatory diagram of a known example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main shaft 2 Power transmission mechanism 3 Eccentric plate 4 Eccentric shaft 5 Bearing 6 Valve block 60 Vacuum hole 7 Planetary gear mounting base 70 Vacuum hole 8 Suction table 81 Suction pad 9 Floating shaft 10 Planetary gear 11 Suction hole Internal gear 12 Shaft 14 Vacuum connection port 15 Support plate 16 Internal gear B Bearing frame F Body frame H Supply hopper T Article carrier

Claims (2)

(57) [Claims] An eccentric shaft which is eccentrically rotated by the rotation of a main shaft, a valve block which is fitted to the eccentric shaft and whose direction is regulated by a floating shaft, and a spring pressure which is adjacent to a side surface of the valve block. A planetary gear that is pressed against and supported rotatably on an eccentric shaft, a suction pad with a suction pad fixed to the planetary gear, and an internal gear fixed to the main body frame that meshes with the planetary gear and is concentric with the main shaft. Wherein the suction pad of the suction table is rotatable by the rotation of an eccentric shaft and is disposed between the supply hopper and the article receiving table. 2. In the planetary gear, a support plate having an eccentric inner hole is rotatably supported via a bearing, and
2. The apparatus according to claim 1, wherein the support plate is attached to the internal gear.