JPH0756262Y2 - Sheet material holding device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention holds a plurality of sheet materials such as fabrics and woven fabrics stacked one by one from the uppermost one and conveys them to a predetermined processing position. The present invention relates to a sheet material holding device, and particularly to a sheet material holding device that can hold a sheet material in a stable manner.

[Conventional technology]

Generally, in a sewing operation, a plurality of sheet materials such as cloth and woven fabric are stacked and arranged, and the sheet materials are held one by one from the topmost one and conveyed to a predetermined processing position such as a sewing place. A holding device is used.

The conventional sheet material holding device as described above has a pickup whose lower surface is formed into a curved suction surface, and an air jet is jetted to this pickup in a tangential direction of the suction surface of the pickup. An air jet is formed. Further, the pickup is provided with a holding mechanism that holds a sheet material sucked by the pickup and that includes a pressing plate on which needles are implanted.

According to such a conventional sheet material holding device, when the pickup is lowered onto the upper surface of the sheet material such as a plurality of laminated fabrics and the air jet is jetted from the air jet port in this state, the air jet Flows along the curved suction surface due to the Coanda effect, so a negative pressure is generated between the vicinity of the pickup surface of this pickup and the uppermost sheet material, and the uppermost sheet material is attracted to the pickup surface of the pickup. Will be done. Then, the sheet material sucked by the suction surface of the pickup is held by the holding mechanism by the holding mechanism, and the pickup is moved to convey the sheet material to a predetermined processing position such as a sewing place. It is like this.

[Problems to be solved by the device]

However, in the above-described conventional sheet material holding device, it is essential to provide the holding mechanism in order to reliably convey the sheet material sucked by the pickup to the predetermined processing position by the air jet from the air jet port. And
Therefore, there is a problem in that the structure becomes complicated and the manufacturing cost increases. Further, since the holding mechanism is configured to hold the sheet material by piercing the sheet material with the needle, the needle may damage the sheet material, and further, at a predetermined processing location, the sheet material is removed from the needle. A jig is required to remove it.

The present invention has been made in view of the above points, and can reliably hold a sheet material without using a holding mechanism having a complicated structure, and can be manufactured at a low cost with a simple structure. An object is to provide a sheet material holding device.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the sheet material holding device of the present invention is provided with a pickup having a curved suction surface on the side to be joined to the sheet material, and an air jet is ejected to this pickup along the suction surface of the pickup. In a sheet material holding device having an air ejection port for causing the pickup to extend substantially horizontally below the adsorption surface of the pickup, the air ejected from the air ejection port passes along the adsorption surface. A sheet material pressing plate that forms a gap between the suction surface and the sheet material, and a vacuum suction port that suction-holds the sheet material sucked on the suction surface by the air jet by vacuum suction. It is characterized by having done.

[Action]

According to the present invention having the above-described configuration, the uppermost sheet material is ejected by ejecting an air jet from the air ejection port in a state where the pickup is lowered onto the upper surface of the sheet material such as a plurality of laminated fabrics. Since the sheet material can be sucked and held by the suction surface of the pickup and the vacuum suction port in this state by the vacuum suction port, the sheet material can be suction-held to the vacuum suction port and its outer periphery, so that the sheet material is stably held. be able to. Further, by providing the holding plate, it is possible to prevent the sheet material from rising in the vicinity of the suction surface when the pickup is lowered to the upper surface of the sheet material, and to reliably ensure the air jet from the air jet port between the pickup and the sheet material. It can be ejected in the meantime.

〔Example〕

 Hereinafter, the present invention will be described with reference to the embodiments shown in the drawings.

FIG. 1 shows a first embodiment of a sheet material holding device according to the present invention, which holds a sheet material such as cloth and woven fabric, and can be raised and lowered by a mechanism (not shown) so that it can be moved up and down. On the side, there is formed a holding portion 2 formed of a suction surface formed in a curved surface similar to a partial cylindrical surface, and one side portion of the pickup 1 is further below the lower end of the holding portion 2. Spout part 3 extending to
Are integrally formed. In addition, at the lower end edge of the ejection portion 3 of the pickup 1, a holding plate 4 that extends substantially horizontally below the middle portion of the holding portion 2 in the front-rear direction.
Are integrally projected, and further, the pickup 1
In the ejection part 3, a single or a plurality of air ejection ports 5 for ejecting an air jet in the tangential direction of the curved surface of the holding part 2 are formed.

Two vacuum suction ports 6 for adsorbing the sheet material by vacuum suction are formed on the side surface of the pickup 1 which is continuous in the vertical direction above the holding portion 2 in the horizontal direction at intervals. A suction connection port 7 is formed on the upper surface of the pickup 1 and is connected to the vacuum suction port 6 and connected to a vacuum suction device (not shown). Further, a friction member 8 such as sandpaper is attached to a side surface of the pickup 1 between the holding portion 2 and the vacuum suction port 6. Instead of sticking the friction member 8, the holding portion 2 of the pickup 1 itself may be made of a material having a large friction coefficient such as urethane.

Regarding the correspondence relationship between the pickup 1 and the sheet material, a plurality of the pickups 1 may be arranged in the width direction of the sheet material, or one pickup 1 may extend in the width direction of the sheet material. You may make it long.

Next, the operation of this embodiment having the above-described configuration will be described.

First, as shown in FIG. 2 (a), the pickup 1 is positioned above a sheet material 9 such as a plurality of laminated cloths by a mechanism (not shown), and then as shown in FIG. 2 (b). The pickup 1 is lowered onto the upper surface of the sheet material 9, and the uppermost sheet material 9 is pressed by the pressing plate 4. In this state, as shown in FIG. 2C, when an air jet is ejected from the air ejection port 5, the air jet flows along the curved surface of the holding portion 2 due to the Coanda effect, so that the pickup 1 Negative pressure is generated between the holding portion 2 and the uppermost sheet material 9 pressed by the pressing plate 4,
The free end portion of the uppermost sheet material 9 is sucked toward the holding portion 2 side of the pickup 1. At this time, since the pressing plate 4 prevents the sheet material 9 from rising, the uppermost sheet material 9 and the holding portion 2 of the pickup 1 are held.
It is possible to properly secure a gap for allowing the air jet to pass therethrough.

After that, in a state where the sheet material 9 is sucked to the holding portion 2 side, vacuum suction is performed from the vacuum suction port 6 and air ejection from the air ejection port 5 is stopped, so that FIG. As shown in, the sheet material 9 can be suction-held on the vacuum suction port 6 and its outer periphery. In this case, the vacuum suction from the vacuum suction port 6 may be started several seconds after the air jet from the air jet port 5 is started, or the air jet and the vacuum suction may be simultaneously started. May be. Further, a pressure sensor (not shown) is attached to the holding portion 2 of the pickup 1.
May be provided, and the vacuum suction may be started after the negative pressure due to the air jet is detected by the pressure sensor.

Finally, as shown in FIG. 2 (e), the pickup 1 may be raised and the sheet material 9 may be conveyed to a predetermined processing position such as a sewing place. At this time, the sheet material 9 is securely held by the pickup 1 by vacuum suction by the vacuum suction port 6 and friction with the friction member 8.

As described above, according to this embodiment, the sheet material 9 sucked one by one by the air jet from the air jet port 5 is picked up by the vacuum suction port 6 and the friction with the friction member 8 to the pickup 1. Since the sheet material 9 is reliably held, the sheet material 9 can be reliably held without separately using a holding mechanism having a complicated structure for holding the sheet material 9 as in the conventional case. Moreover, since the holding mechanism having the complicated structure described above is unnecessary, the structure is extremely simple,
It can be easily manufactured, and the manufacturing cost can be reduced.

Further, the pressing plate 4 prevents the sheet material 9 from rising, and holds the uppermost sheet material 9 and the holding portion 2 of the pickup 1.
Since a gap for allowing an air jet to pass therethrough can be properly secured, air between the uppermost sheet material 9 and the holding portion 2 of the pickup 1 in the tangential direction of the curved surface is formed. The jet flow can be surely ejected to generate a negative pressure, and as a result, the sheet material 9 can be surely sucked.

FIG. 3 shows a second embodiment of the present invention, in which the pickup 1 has a holder 10 formed in a cylindrical shape, and the end face of the holder 10 has a plane L-shape. Is integrally attached to the inner surface of the ejection plate 11 formed in the above so that the axis line is located in the horizontal direction. Further, a holding plate 4 protruding in the horizontal direction is fixedly fixed to the lower end edge of the ejection plate 11 so as to extend almost below the center line of the holding body 10. An air jet flow is applied to the holding body 10 and the holding plate 4 substantially at the central portion in the longitudinal direction of the jet plate 11.
A nozzle-shaped air ejection port 5 for ejecting along the tangential direction of the holding plate 1 is attached between and. Further, a vacuum suction port 6 for sucking the sheet material 9 by vacuum suction is formed on the peripheral surface of the holding body 10 which is the back of the air ejection port 5, and below the vacuum suction port 6. A friction member 8 such as sandpaper is attached to the peripheral surface of the holding body 10 in the vicinity.

Also in this embodiment having such a configuration, as shown in FIG. 4, in a state in which the pickup 1 is lowered onto the upper surface of the sheet material 9 such as a plurality of laminated cloths, as in the above-described embodiment. By ejecting an air jet from the air outlet 5, the uppermost sheet material 9 is sucked toward the holding body 10 side of the pickup 1, and in this state,
By vacuum suction from the vacuum suction port 6, the sheet material 9 can be suction-held on the vacuum suction port 6 and its outer periphery.

As described above, also in the present embodiment, as in the first embodiment described above, the sheet material 9 can be securely held, and the holding mechanism having a complicated structure is not required, so that the structure is extremely simple. It can be easily manufactured, and the manufacturing cost can be reduced. Also, the holding plate 4 allows the uppermost sheet material 9 and the holding body 10 for the pickup 1.
Since a negative pressure can be generated by reliably ejecting the air jet between and, it is possible to surely suck the sheet material 9.

In addition, as shown in FIG. 5, a notch is formed at the center of the holding plate 4.
If 12 is formed, the area pressed by the pressing plate 4 is reduced, so that the degree of freedom of the uppermost sheet material 9 is increased, and between the sheet material 9 and the holder 10 of the pickup 1,
The air jet from the air jet port 5 can be jetted more efficiently, and as a result, the sheet material 9 can be sucked more reliably.

Further, the present invention is not limited to the above-described embodiment, but various modifications can be made as necessary. For example, the number of vacuum suction ports may be one or three or more.

[Effect of device]

As described above, the sheet material holding device according to the present invention is
Since the sheet material is sucked and held by the pickup by vacuum suction, the sheet material can be securely held, and since a holding mechanism with a complicated structure is unnecessary, the structure is extremely simple and easy. Therefore, the manufacturing cost can be reduced. Also, by providing a holding plate, the sheet material can be prevented from rising and the air jet from the air jet can be surely ejected between the pickup and the sheet material. Can be done

[Brief description of drawings]

FIG. 1 is a perspective view of a pickup showing a first embodiment of a sheet material holding device according to the present invention, and FIGS. 2 (a), (b),
(C), (d) and (e) are explanatory views showing a sheet material holding operation by the pickup of FIG. 1, FIG. 3 is a perspective view of the pickup showing a second embodiment of the present invention, and FIG. FIG. 3 is an explanatory view showing a sheet material holding operation by the pickup of FIG. 3, and FIG. 5 is a perspective view of a pickup showing still another embodiment of the present invention. 1 ... Pickup, 4 ... Pressing plate, 5 ... Air jet port, 6 ... Vacuum suction port, 8 ... Friction member, 9 ... Sheet material, 10 ... Holder.

Claims (1)

[Scope of utility model registration request] 1. A pickup having a curved suction surface on the side to be joined to a sheet material is provided.
In a sheet material holding device having an air ejection port for ejecting an air jet along an adsorption surface of a pickup, the sheet material holding device extends substantially horizontally below the adsorption surface of the pickup and ejects from the air ejection port. A pressing plate of a sheet material that forms a gap between the suction surface and the sheet material to allow the air to pass along the suction surface, and the sheet material sucked on the suction surface by the air jet is vacuumed. A sheet material holding device, characterized in that a vacuum suction port for sucking and holding by suction is formed.