JPH0632919Y2 - Sheet material transfer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an improvement of a transfer device for transferring and stacking sheet materials.

[Prior art]

When loading or unloading a sheet material such as a thin metal plate, the sheet material is horizontally transferred to a position above the planned placement position and stopped. Here, for example, it is lowered vertically or obliquely and placed one after another on a mounting table or the like whose height can be adjusted downward. In the case of a steel plate, a transfer device using a magnet chuck or the like is often used, but it cannot be used for a non-magnetic metal plate or a plastic sheet. In the case of a sheet material having a smooth surface, a transfer device using a vacuum cup is used, but it cannot be used for a sheet having an uneven surface or a perforated surface.

As a transfer device used in the above case, FIG.
And as shown in FIG. That is, one side of the sheet material 101 is clamped by the clamp 103, and is horizontally or obliquely moved on the fixed first roller conveyor 105, and is placed on the mounting table 10 with the lifting mechanism placed at the planned mounting position.
There is a carriage 109 with a clamp 103 that stops on the 7.

The first roller conveyor 10 is provided above the mounting table 107.
5, a bending movement type second roller conveyor 111 is provided.

The second roller conveyor 111 temporarily holds the sheet material 101 horizontally above the mounting table 107, and then the sheet material 10
1 moves in the direction opposite to the moving direction, bends downward near the end of the first roller conveyor 105, and retreats out of the movement path of the sheet material 101.
As the second roller conveyor 111 retreats, the mounting table 1
07 is a space, and when this space expands to a certain extent, the sheet material 101 clamped at one side by the clamp 103
Are sequentially hung on the upper surface of the mounting 107th and are mounted.

At this time, it was necessary to lower the clamp 103 to the vicinity of the mounting surface as shown in FIG. 5, or to swing it obliquely downward. This is because when the sheet material 101 hangs down, the sheet material 101 easily bends near the holding portion (indicated by X) of the clamp 103. The present invention is a device having a function of preventing the bending.

[Problems to be solved by the invention]

However, the adjustment of the operation timing with respect to the drive mechanism for raising and lowering or swinging the clamp 103 is delicate, and even if it is too early or too late as shown in FIG. A fold mark will be attached to.

The present invention was devised in light of such conventional problems,
An object of the present invention is to provide a sheet material transfer device capable of easily and surely adjusting the operation timing of an elevating mechanism or a swinging mechanism of a clamp.

[Means for Solving the Problems] In order to solve the above-mentioned conventional problems, the sheet material transfer device of the present invention is a carrier with a clamp that holds one side of the sheet material and moves to a position above the planned mounting position. Then, the sheet material moved by the carrier is temporarily supported above the place where the sheet is to be placed, then moved in the direction opposite to the sheet material movement direction, and further bent and retracted outside the sheet material movement path. The configured bending and moving type roller conveyor and the carrier, which is attached to the carrier, swings or raises or lowers the clamp sheet when placing and holding the sandwiched sheet material at the planned placement location as the roller conveyor bends and retracts. Drive means,
A sensor for detecting the moving position of the roller conveyor, which is provided in the roller conveyor section so as to vary the detection position, is provided for determining the operation timing of the clamp driving means.

[Function of device]

Since the sheet material transfer device of the present invention is configured as described above, the space above the planned mounting location expands as the roller conveyor bends and retracts, and the sheet material that gradually hangs from this space to the planned mounting location. The operation for minimizing the bending in the vicinity of the portion held by the clamp is accurately performed, and the operation can be easily and reliably adjusted. That is, the drive start timing of the drive means that moves the clamp downward or swings obliquely downward is determined by detecting the bending retracted position of the roller conveyor. Moreover, since the detection position of the position detection sensor is variable, adjustment can be performed easily and quickly.

〔Example〕

An embodiment of the device of the present invention will be described below with reference to the drawing of FIG.

This is an example in the case of unloading in which a thin steel plate 1 which is a sheet material punched by a punch press (not shown) is taken out from the press and placed on a mounting table 3. The steel sheet 1 is horizontally transferred from the punch press to the upper side of the mounting table 3 on the first roller conveyor 5 which is horizontally mounted. This includes guide rails 7 arranged on both sides of the first roller conveyor 5.
The steel plate 1 is towed and moved by the carrier 9 which rides on and travels above. A clamp 11 is attached to the carrier 9, and the clamp 11 holds the peripheral edge of the steel plate 1 to perform the towing.

The mounting table 3 placed at the planned mounting position is an elevating type mounting trolley having an elevating mechanism 13 in which an X-shaped arm and a hydraulic cylinder are combined, and traveling wheels 15. The mounting table 3 is mounted according to the loading condition of the steel plate 1. The table height can be adjusted optimally.

A short second roller conveyor 17 is provided so as to extend on the same path, close to the end portion of the first roller conveyor 5 that is arranged even before the planned placement position. Therefore, the second roller conveyor 17 is disposed above the mounting table, that is, above the mounting table 3, and horizontally supports the steel plate 1 held by the carrier 9 above the mounting table 3 once.
Next, the steel plate 1 is gradually lowered onto the mounting table 3. For this reason, the second roller conveyor 17 moves in the direction of the arrow opposite to the transfer direction of the steel sheet 1, and the first roller conveyor 5
Bend downward near the end of and continue to move,
The steel plate 1 can be retracted from the transfer route.
Therefore, an S-shaped guide rail 19 and a conveyor moving mechanism (not shown) are provided on both sides of the second roller conveyor 17, which is a bending movable roller conveyor.

In the embodiment, the conveyor moving mechanism has a structure in which a roller chain is arranged in an endless manner along the guide rail 19 and the roller chain is driven in the forward and reverse directions in the geared mode via the sprocket wheel (illustration). Omitted). It should be noted that both the first roller conveyor 5 and the second roller conveyor 17 merely support the lower surface of the steel plate 1 on which the carrier 9 is driven to travel and tow, and no driving is required.

The carrier 9 is provided with a small oil cylinder 21 as a driving means for vertically moving the clamp 11 up and down. The cylinder 21 side of the oil cylinder 21 is mounted on the carrier 9, and the clamp 11 is mounted on the piston rod side.

Guide rail 19 for moving the second roller conveyor 17
Photosensors 23 as a plurality of sensors are arranged at a small interval in a predetermined range of the side member, and detect the moving position of a tongue piece (not shown) provided near the end side of the second roller conveyor 17. . That is, the moving position of the second roller conveyor 17 as shown in FIG. 2 is detected, and the detection timing is set to the + side by switching selection of the plurality of photosensors 23.
Can be adjusted to the negative side.

With the detection signal of the photo sensor 23, the operation of the hydraulic cylinder 21 of the clamp 11 attached to the carrier 9 is started,
The clamp 11 is lowered as shown in FIG. 2 so as to reduce the bending near the edge of the steel plate 1 held by the clamp 11, and further, the switching is selected by the photosensor 23 so as to minimize the bending. be able to. The sheet material transfer device of the present invention is not limited to the above-described embodiment, and various modifications can be made. For example, even if the raising and lowering movement of the clamp 11 by the driving means of the carrier 9 is performed as a swinging and swinging movement as shown in FIG. 3, it is possible to exert a substantially similar bending reducing action in the vicinity of the holding portion of the sheet material.

Further, a sensor of another type such as a proximity switch may be used in place of the photo sensor for detecting the moving position of the bending and moving type roller conveyor, and instead of arranging the plurality of sensors, one sensor is provided.
Individual sensors may be attached to the guide rail member of the bending movement roller conveyor via an attachment position changing mechanism composed of a screw spindle and a slide rail. With such a structure, the spindle can be rotated to arbitrarily and easily adjust the bending movement position of the roller conveyor and the operation timing of the lowering or swinging of the carriage clamp.

[Effect of device]

As is clear from the above description, according to the sheet material transfer device of the present invention, it is possible to prevent the bending phenomenon near the sheet material holding portion, which is likely to occur at the stage of mounting the seat, by a simple mechanical device. It is possible to easily and surely adjust the timing of the movement operation of the clamp, so that it is possible to quickly respond so as not to bend the sheet material.
Therefore, it exerts a great effect in improving the quality and yield of the sheet material product.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an embodiment of the device of the present invention, and FIG. 2 is a side view of essential parts after a certain time has elapsed from the state of FIG.
FIG. 3 is a side view of a main part of another embodiment, FIG. 4 is a schematic side view of a conventional device, and FIG. 5 is a schematic side view after a certain time has elapsed from the state of FIG. Description of main drawing symbols 1 …… Steel plate (sheet material) 9 …… Carrier 11 …… Clamp 17 …… Second roller conveyor (flexible moving roller conveyor) 21 …… Oil cylinder (driving means) 23 …… Photo sensor (Sensor)

Claims (1)

[Scope of utility model registration request] 1. A carrier with a clamp that holds one side of a sheet material and moves to a position above a planned placement position, and a sheet material that has been moved by the carrier is horizontally supported above the planned placement position. A roller conveyor configured to move in a direction opposite to the direction and retracted to the outside of the sheet material movement path, and a holding sheet material attached to the carrier, which is to be placed on the planned place for placement as the roller conveyor retracts. When loading and unloading, a drive means for swinging or raising and lowering the clamp, and a sensor for detecting the moving position of the roller conveyor, which is provided in the roller conveyor portion so as to variably detect the operation timing of the clamp driving means. A sheet material transfer device comprising: