JPS6221689B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stack support for a sheet feeder that separates sheet materials stacked in multiple layers one by one and supplies them to a predetermined position.

Conventionally, a sheet feeder with a structure shown in Fig. 1 has been used to separate sheet materials stacked in multiple layers (such a stack of sheet materials is hereinafter referred to as a stack) one by one and feed it to, for example, a press machine. There is. This type of sheet feeder includes a lifter (or link mechanism) 1 that places the stack S and moves up and down depending on the number of remaining sheets, and a bucket that moves up and down the stack S placed on the lifter 1. It is composed of a vacuum lifter 2, a belt feeder 3, etc., which supplies the sheet material W lifted by the vacuum lifter 2 to, for example, a subsequent press machine. A magnetic floater 4 is provided to separate the parts from each other.

Then, during the lowering operation of the vacuum lifter 2, the sheet material W at the top of the stack is adsorbed and supported by the vacuum cup 2a and separated from the stack S, and then the sheet material W is transferred to the belt feeder 3 by the ascending operation of the vacuum lifter 2. , the sheet material W is fed to the press mold by the operation of the belt feeder 3.

However, in the conventional sheet feeder having such a configuration, since the mounting surface of the stack support base 5 on which the stack S is placed is a horizontal surface, the edge of the sheet material W is Even though a force is applied to separate the parts from each other and take one piece, the sheet materials adhere to each other due to oil etc. adhering to the sheet materials, and as mentioned above, the vacuum lifter Multiple sheet materials are fed at the same time when lifted up (overlapping)
There is.

Here, the stack support stand 5 usually has a load of 300 to
Although 400 sheet materials are stacked, the phenomenon of overlapping as described above may occur frequently, especially when the number of stacked sheet materials is relatively small (approximately 50 to 70 sheets).

In this way, if stacked sheet materials are fed to the subsequent press machine, it may cause damage to the press mold or malfunction of the press machine, and the machine itself must be stopped, resulting in the press machine being damaged. As a result, the operating rate of the production line will decrease. Breakage of press dies, especially in automobile production plants, has a serious impact on the entire production line. Therefore, in order to prevent the stacked sheet materials from being fed to subsequent press machines, etc., the sheet feeder side removes the sheet materials from the stack. must be removed one by one.

The present invention has been made in view of the above-mentioned problems of the conventional sheet feeder. Separately from the main body, a support block that can be raised and lowered relative to the support main body is provided so as to be movable relative to the support main body in a direction perpendicular to the front surface of the magnetic floater, and the height and horizontal direction of the support block are adjustable. The sheet material on the support block is given a predetermined curvature depending on its position.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

2 and 3 show an embodiment of the present invention, and parts common to those in FIG. 1 are designated by the same reference numerals.
5 represents a magnetic floater, and 5 represents a stack support stand. On this stack support stand 5 is placed a stack S formed by laminating normally 300 to 400 sheet materials W, which are press steel plates. In this stacked state, the edge portions of the sheet materials W are separated from each other by the magnetic induction action of the magnetic floater 4. Further, a plurality of vacuum cups 2a of the vacuum lifter 2 are provided depending on the size of the sheet material W.

Further, in the figure, reference numeral 10 denotes a frame-shaped support body that forms the main body of the stack support 5;
A base 11 to which a hydraulic or pneumatic cylinder 12 is attached is horizontally disposed in the center. Then, the base 11 is screwed into a screw 13 horizontally installed in the center of the support body 10, and by rotating the screw 13 by starting the motor 16, the base 11
is configured to travel and move in the direction of arrow A (direction perpendicular to the front surface of the magnetic floater 4). Further, a support block 14 is integrally fixed to the piston rod 12a of the cylinder 12, and its height can be arbitrarily set by the expansion and contraction movement of the cylinder 12.

As shown in FIG. 4, this support block 14 has a medium-height shape by bulging out the central part of the mounting surface 14a on which the stack S is mounted upward, that is, in the opposite direction to the direction in which the load is applied by the stack S. As such, the entire mounting surface 14a for the stack S is configured to be an arcuate curved surface. As a result, part or all of the sheet material W at the bottom of the stack comes into contact with the placement surface 14a, and the entire sheet material W is supported with a curvature in the X direction as shown in FIG. There is. In addition, at this time, the above-mentioned placement surface 14
It is effective to set the curvature direction X of a and the arrangement direction Y of the magnetic floaters 4 (FIG. 3) to be perpendicular to each other. Note that 15 is a guide for the base 11.

Therefore, according to this embodiment, the support block 1
Assuming that the position and height of 4 in direction A are set in advance to predetermined positions, the stack S is supported in a curved manner due to the curvature of the mounting surface 14a and its own weight as described above. As the upper stage of S is reached, an upward restoring force acts on the curvature of the sheet, so that the edge W ₁ adjacent to the magnetic floater 4 and the edge W ₂ opposite thereto are particularly susceptible to the sheet material itself. It becomes a floating shape and peels off from the sheet material W on the lower stage. Under such conditions, the separation force by the magnetic floater 4 is further applied, so that the sheet materials W are reliably and easily separated one by one and lifted up by the vacuum lifter 2 as described above. . In other words, since the sheet material itself floats due to its restoring force, the separation efficiency by the magnetic floater 4 is significantly improved, and stacking of the sheet materials W as in the conventional method is reliably prevented.

Furthermore, if the size and thickness of the sheet material W placed on the stack support table 5 changes, the separation efficiency of the magnetic floater 4 will naturally change, but in this case, the following operation is performed. That is, by rotating the screw 13 and sliding the base 11, the cylinder 12 is expanded and contracted to move the support block 1.
Adjust the position and height of 4 in direction A, respectively.
A necessary curvature is given to the stack S according to the size and thickness of the sheet material W so that the separation ability of the magnetic floater 4 can be maximized. Thereby, the sheet material W is reliably peeled off one by one as described above. In this way, according to this embodiment, the stack S can be adjusted according to the size and thickness of the sheet material W.
By changing the curvature of the sheet material, it can be used with any kind of sheet material, making it possible to use it for general purposes.

FIG. 5 shows another embodiment of this invention,
In this embodiment, a support block 14 is provided on one side of the support base body 10, and this support block 14 is configured to be movable up and down and slidable by a cylinder 12 and a screw (not shown), so that the curvature of the sheet material W can be changed. Therefore, the same effects as in the first embodiment can be obtained in this embodiment as well. Particularly in the case of a narrow sheet material in this embodiment, there are the following advantages. Normally, the same magnetic floater is used even when the size and thickness of the sheet material changes, but in the case of narrow sheet materials, the amount of separation becomes too large, resulting in poor suction by the vacuum lifter. do. For this reason, in the past, a magnetic force adjustment plate was attached to the separator to adjust the amount of separation, but when attaching the magnetic force adjustment plate, the worker had to work under the material support table, reducing work efficiency. and undesirable from a safety point of view. According to this embodiment, depending on the setting of the height of the support block 14, it can also function as the magnetic force adjusting plate, which is more preferable especially from the viewpoint of work efficiency and safety.

In each of the above embodiments, a sheet feeder in which the stack support stands rise and fall has been described, but in addition to this type of sheet feeder, there are also fixed types in which the stack support stands do not rise and fall, and sheet feeders that are directly supported by a moving conveyor. Alternatively, there are various types such as a support fork retractable type, and it goes without saying that the present invention can be applied to any of these types.

As is clear from the above description, according to the present invention, a support block is provided which is movable in the horizontal direction with respect to the support body and which can be raised and lowered, in addition to the support body, and the support block is moved in accordance with the position of the support block. Since the sheet material has a predetermined curvature, the sheet material generates a restoring force, which significantly improves the separation efficiency of the magnetic floater, which is the sheet material peeling mechanism, and prevents sheet materials from stacking up and separates them into one sheet. It is possible to reliably separate and supply each product. As a result, it is possible to prevent damage to the press die and failure of the press machine, thereby improving the operating rate of the production line. Further, by making the curvature of the sheet material variable, there is an effect that variations in the size and thickness of the sheet material can be adequately coped with.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing a schematic configuration of a conventional sheet feeder including a stack support base, FIG. 2 is an explanatory diagram showing a configuration of a sheet feeder equipped with a stack support base according to the present invention, and FIG. FIG. 4 is a plan view of only the support base, FIG. 4 is a perspective view of only the essential parts of the stack support base, and FIG. 5 is an explanatory diagram showing another embodiment of the present invention. 4... Magnetic floater, 5... Stack support base, 10... Support base body, 12... Cylinder, 14... Support block.

Claims (1)

[Claims] 1. A stack S comprising a magnetic floater 4;
In a stack support stand 5 of a sheet feeder that peels sheet materials W one by one from It is provided movably in a direction perpendicular to the front surface of the magnetic floater 4 with respect to the base body 10, and gives a predetermined curvature to the sheet material on the support block 14 according to the height and horizontal position of the support block 14. A stack support stand 5 for a sheet feeder characterized by: