JP2891958B2 - A device for separating and lifting the single sheet at the top of the stack - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for separating and lifting sheet sheets, especially sheet metal sheets (Blechtafel), present at the top of a pile or pile. A sheet catching device for periodically catching and lifting, and a sorting device acting on a trailing edge of the sheet lifted by a predetermined size, wherein the sorting device includes: A separating element having a sliding sloping portion, which is determined by a rear edge of the uppermost sheet against a spring force when the latter is lifted. From a resting position in the vicinity of the stack protruding above the stack by a distance from the stack to a displacement position spaced a predetermined distance from the stack, until the trailing edge passes over the separating element. I do.

[0002]

2. Description of the Related Art The following is known in such devices. That is, the separating element is arranged on a pivotable lever, which is spring-loaded in the sheet-feeding direction and has an abutment, and the corresponding abutment of the lever is displaced. Abutting the back side of the stack without any paper.

A disadvantage of such a device is that, in response to each separating operation and continuous feeding operation of the lifted sheet, the abutment of the lever oscillates against the rear side of the stack by spring force. That is.

[0004] This results in bothersome impact sounds and damage to the trailing edge of the sheet.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to improve a device of the type mentioned at the outset and to provide a device with low noise and which does not damage the sheet.

[0006]

In order to solve this problem, according to an embodiment of the present invention, a support is provided in a rear upper region,
The pile abuts, to the support, separating elements are spring-loaded by being guided by the movable and the stationary position of the separating element between a displacement position and rest position of the separating element , After the support is stacked
The side was spring loaded .

[0007]

Since only the separating element is moved during operation, the moving mass is small and there is little noise when moving backward to its rest position. Since the moved components do not hit the rear side of the stack, the sheet damage caused by such impacts does not occur.

[0008] Furthermore, the small mass to be moved makes it possible for the device according to the invention to be composed of light components of small structural dimensions. Because there is no need to take on more power.

In a simple manner, in order to ensure that the separating element always occupies its optimum position with respect to the rear side of the upper area of the stack, the support is provided with a spring against the rear side of the stack. Loaded.

The support can be formed as a lever in order to easily and automatically align the support behind the stack. The support is pivotable at one end thereof approximately on the trailing end area of the stack, about a pivot axis oriented transversely to the sheet-feeding direction, and is free to rotate. At its other end against the stack.

In the stationary position, the separating element is arranged in a guide notch of the support, which is oriented in the sheet-feed direction and opens toward the stack.
Protruding from the guide notch by a predetermined dimension in the sheet-feeding direction in the sheet-feeding direction results in a simple device with small dimensions and few components.

In order to generate a spring force which loads the separating element into its rest position, the separating element is loaded in a simple manner by means of a compression coil spring arranged in the guide recess in the sheet-feeding direction. Can be.

In this case, the end of the compression coil spring, which faces away from the separating element, is supported by an adjusting screw which is adjustable in the sheet-feeding direction, so that the compression coil spring can be formed in a simple manner. If the preload or preload is adjustable, the optimal force to be overcome during separation can be adjusted depending on the quality of the sheet to be fed.

If the compression coil spring is a coil spring,
Small structural dimensions are obtained.

If the discriminating element is a ball, in addition to the spring force for displacing the discriminating element, the frictional force and the tilting power that make it difficult to define the magnitude of the force to be actually overcome are overcome. No need at all. Furthermore, such a construction makes it possible to keep the structural dimensions of the separating element optimally small and to easily manufacture the guide notch as a hole.

[0016] The ball is only about 1/3 of the ball diameter,
If it is possible to project from the guide notch in the sheet feeding direction,
The support of the ball is transverse to the direction of ball displacement,
Always stipulated. At the same time, the inclination of the ball surface is defined. Along the slope of the ball surface, the edge of the lifted sheet moves so that a large force component is directed in the direction of extension of the guide notch.

At least the surface of the ball is hardened (Haertun
g), high wear resistance is obtained both for the frictional load caused by the single sheet and for the frictional load in the guide notch.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

The illustrated device has a support 1 which extends substantially vertically in the upper rear area of the stack 2 and which is in the upper region of the support 1 (shown in FIG. 1). 3), it is possible to pivot about a pivot axis oriented transversely to the sheet-feeding direction 3 substantially on the rear end area of the pile 2.

At another free, downwardly directed end of the support 1, the support 1 is formed as a separating element 4, which is oriented in the sheet feeding direction 3 of the separating element 4. The side is held in contact with the rear upper area of the stack 2 by a compression coil spring 5 with a strong spring force.

In order to avoid damage to the sheets, the lower end of the separating member 4 is provided with a slope 6 which is oriented away from the stack 2.

A penetrating guide notch 7 is formed in the separating member 4 and is oriented substantially in the sheet-feeding direction 3. The guide notch 7 is located behind the guide notch 7 in the sheet-feeding direction 3. Are threaded holes 8 and guide notches 7
The area on the front side in the sheet-feeding direction 3 is a hole 9 having a smooth inner wall.

The opening 10 of the hole 9 has a cross section having a diameter reduced compared to the diameter of the hole 9, the cross section being located in the hole 9 and being approximately equal to the diameter of the hole 9. A stop is formed for the ball 11 having a diameter. By means of such a stopper, the ball 11 which forms the separating element for the lifted single sheet
However, it projects from the hole 9 by about 1/3 of the diameter of the ball 11 when viewed in the sheet feeding direction 3.

A headless screw as an adjusting screw 12 is screwed into the threaded hole 8.
On its inner end face, a compression coil spring 13, which is formed as a coiled spring and has a spring force much smaller than the compression coil spring 5, is supported at one end. The other end of the compression coil spring 13 loads the ball 11 in the sheet feeding direction 3. Through the adjusting screw 12,
The preload or preload of the compression coil spring 13 is adjustable, and thus the spring force for the displacement of the ball 11 is adjustable.

On the rear end of the stack 2 is arranged a separating suction port 14 which can move up and down in a substantially vertical direction in the cycle of a machine for processing single sheets. The sheet 15 existing at the top of each of the papers 2 can be caught and lifted.

FIG. 1 shows a sheet 15 lifted up to just before reaching the ball 11 in such a manner. Since the ball 11 protrudes above the pile 2 in the sheet feeding direction 3 by such a size that the ball 11 can slightly look into the face from the guide notch 7, the sheet 15
Is lifted further, the rear edge 1
6, the ball 11 is loaded. In this case, the ball 11 whose surface acts as a sliding inclined portion
Is pushed into the guide notch 7 against the spring force of the compression coil spring 13. Such an embodiment is shown in FIG.

By the mouthpiece 14, one sheet 1
When two single sheets are caught and lifted instead of five, the rear edge 16 of both single sheets causes the ball 1 to be lifted.
When a load is applied to 1, a load is generated by the balls 11 that separates the trailing edges of both sheets. The lifted lower sheet is prevented from being further lifted by the ball 11 and returns to the pile 2.

On the other hand, the upper sheet 15 can be lifted further and guided to a subsequent feed device.

The device according to the invention is particularly suitable for high-rigidity sheet and sheet metal sheets.

[Brief description of the drawings]

FIG. 1 shows a first operating position of the device for separating and lifting the uppermost sheet.

FIG. 2 shows a second operating position of the device shown in FIG. 1;

FIG. 3 is a view showing a judgment position of the apparatus shown in FIG. 1;

[Description of Signs] 1 support, 2 stacked paper, 3 sheet feeding direction, 4 separating member, 5 compression coil spring, 6 slope, 7 guide notch, 8 threaded hole, 9 hole, 1
0 opening, 11 ball, 12 adjusting screw, 13
Compression coil spring, 14 mouthpiece, 15 sheets, 16 trailing edge

────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Herbert Hermann Oberzhausen Gumberto Seestrasse 39 (56) References JP-A-4-338040 (JP, A) JP-A-7-97081 (JP, A) (58) Field surveyed (Int. Cl. ⁶ , DB name) B65H 1/00-3/68

Claims (10)

(57) [Claims] An apparatus for separating and lifting a top sheet present on a pile of sheets, wherein the top sheet is periodically caught and lifted. A catching device and a sorting device acting on the trailing edge of the sheet lifted by a predetermined dimension, the sorting device comprising a sorting element having a sliding ramp. The discriminating element, by the trailing edge of the uppermost sheet,
When the sheet is lifted, the trailing edge is moved from a stationary position in the vicinity of the stack protruding by a predetermined dimension onto the stack against a spring force to a displacement position at a predetermined distance from the stack. A support (1) in the form of being movable substantially horizontally until it crosses the separating element, in the rear upper area, against a stack (2), The separating element is movably guided between a rest position and a displaced position of the separating element and is spring-loaded at the rest position of the separating element, and the support (1) is
Characterized by being spring-loaded on the rear side of the paper ,
A device that separates and lifts the single sheet at the top of the stack. 2. The support (1) is formed as a lever, said support (1) being at one end of the support (1) substantially on the rear end area of the stack (2). At the other free end of the support (1) to be able to pivot about a pivot axis oriented transversely to the sheet-feeding direction (3) and to the stack (2). Claims in contact
An apparatus according to claim 1 . 3. The separating element is arranged in a guide notch (7) of the support (1) which is oriented in the sheet-feeding direction (3) and opens towards the stack (2). in the rest position of the separating element, protrudes from the guide notches (7) in a predetermined size single sheet feed direction (3), according to claim 1 or 2 wherein. 4. A separating element is guided by the notches (7) arranged compression coil spring in the (13), are loaded with single sheet feeding direction (3), according to claim 3, wherein. 5. The device according to claim 4 , wherein the preload or the preload of the helical compression spring is adjustable. 6. An end of the compression coil spring (13) opposite to the separating element has a sheet feeding direction (3).
6. The device according to claim 5 , wherein the device is supported by an adjusting screw (12) that is adjustable. 7. The device according to claim 4 , wherein the compression coil spring is a coil spring. 8. A separating element is a ball (11), The apparatus of any one of claims 1 to 7. 9. Ball (11), only about 1/3 of the diameter of the ball (11) can be projected from the guide notch in single sheet feed direction (3) (7), according to claim 8 apparatus. 10. The device according to claim 8 , wherein at least the surface of the ball is hardened.