JPH0215880Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a sheet bundle feeding device used in cases where a predetermined number of sheet bundles are sent out from a pile of stacked sheets to the next process.

Conventional technology When a certain number of sheets of paper cut to a certain size are packaged and shipped, conventionally, when stacking up the paper cut in the cutting process, a piece of paper (marker) is placed between each certain number of cut sheets. The usual method used in the packaging process is for a person to pick up the bundle of paper bounded by the interleaving paper and feed it onto the packaging table, but this work is quite labor-intensive. Therefore, automation was desired. For this reason, an automated method has been proposed by the applicant. The method is to insert a wedge under the above-mentioned interleaving paper to form a gap at the boundary between the paper stacks, insert the tip of the pusher into this gap, and separate the paper stack from the paper stack by the wedge. It pushes you forward. in this case,
Since the marking paper is inserted into the side of the paper stack at a predetermined number of sheets vertically, the wedge moves from top to bottom along the row of paper, detects the paper and stops, and then inserts the paper into the stack. It performs the action of cutting into the side of the paper pile with the underside of the paper. However, when stacking sheets of paper cut in the cutting process and inserting interleaving sheets, the horizontal position of the interleaving sheets varies, and the interleaving sheets are not lined up vertically in a straight line on the side of the paper pile, and the interleaving sheets are The rows are scattered left and right. Also, the interleaving paper that comes out from the sides of the paper pile does not necessarily come out horizontally and straight; some are curved upwards, while others are hanging downwards. In addition, the sheet stack may be misaligned due to the conditions of the previous process or transportation, so even if the wedge is simply moved from top to bottom, the position of the interleaving paper will not be detected correctly, and the wedge will not align correctly. There were cases where the paper was not inserted to the bottom side.

Problems to be Solved by the Invention This invention allows the wedge to be kept at a constant distance from the sheet stack even if the interleaving paper marks sticking out from the sheet stack are out of alignment or the interleaving paper is bent. The object of the present invention is to provide a means for holding and correctly guiding the wedge under the interleaving paper so that the wedge is accurately inserted at the boundary between a predetermined number of sheet bundles.

Means for Solving the Problems In the present invention, a wedge is held by an arm that is driven up and down, forward and backward, left and right, and a paper detecting means is embedded in the wedge surface of this wedge.

Operation: By maintaining the distance between the wedge and the sheet pile at a constant interval using photoelectric detection means or other detection means, and moving the wedge up and down and left and right to detect the interleaving paper using photoelectric and other detection means, By adjusting the position of the wedge so that the relative positional relationship between the interleaving paper and the wedge is constant and moving the wedge forward, insert the wedge into the side of the sheet pile so that it is correctly below the interleaving paper. .

Embodiment FIG. 1 shows an outline of an apparatus according to an embodiment of the present invention, divided into several operating stages. In the figure, S is a stack of sheets, and P is a mark slip sheet inserted into the stack of sheets every predetermined number of sheets. 1 is a wedge, which is not shown in the figure, but is held in a robot arm that can move up, down, forward, backward, left and right. The first wedge is the first
From there, the sheet pile S is raised by the thickness of a predetermined number of sheets by a table lifter, and the wedge 1 comes to the position shown by the dotted line in the figure with respect to the sheet pile S. Next, as shown in FIG. 1b, the tip of the wedge 1 is brought close to the side surface of the sheet pile S. At this time, the interleaving paper P is lifted by the slope of the wedge 1. Next, as shown in FIG. 1c, a spatula-shaped guide bar 2 is pushed out along the lower surface of the wedge 1. The guide bar 2 is inserted into the side surface of the stack of sheets S using the back surface of the slip sheet P as a guide. Thereafter, the wedge 1 is moved forward (to the left in the figure) along this guide bar 2, and the tip of the wedge is inserted between the interleaving paper P and the guide bar 2, and the upper sheet bundle of the interleaving paper P is placed on the slope of the wedge. Twist and push up (1st
Figure d). Finally, as shown in Fig. 1e, the pusher 3 moves forward, its fingertip enters the gap g on the side of the sheet stack S formed by the wedge 1, moves further forward, and moves a predetermined number of sheet bundles to the left. send it to someone else. Finally, the pusher, guide bar, wedge, etc. are retracted, and the state returns to that shown in FIG. 1a. The above-mentioned operations are sequentially repeated on the side surface of the sheet pile S from top to bottom. If the sides of the sheet pile are straight and the interleaving paper inserted between them is lined up vertically, the above operation should be repeated smoothly, but in reality the sheet pile is tilted. Since the position of the interleaving paper P varies in the width direction of the sheet (perpendicular to the paper surface of the figure), the wedge 1 descends from the solid line position in Figure 1 a (the sheet peak rises) and When reaching position b, there may be cases where there is no interleaving paper on the top surface of the wedge, or there is an interleaving paper at a position that is biased toward the edge of the width of the wedge. In such cases, the tip of the guide bar 2 may If the sheets hit the side of the pile of sheets, they may not be inserted into the side of the pile of sheets, or even if they are inserted, the number of sheets will not be at the correct position. Of course, the wedge 1 cannot be inserted normally. In the present invention, in the step shown in Fig. 1b, first, the sheet pile S and the wedge 1 are searched and moved to a position where they are at a predetermined distance, and then the wedge 1 is moved left and right (in a direction perpendicular to the plane of the figure) and the interleaf sheet is moved. P is searched so that the interleaving paper is located at the center of the width of the upper surface of the wedge 1. Also, the sheet pile S rises by the thickness of a predetermined number of sheets for each cycle of operation,
Since it is difficult to accurately control the amount of rise to the thickness of a single sheet, even if the height position of the tip of the wedge 1 is far apart from the height position of the interleaving paper P, the wedge 1 cannot be inserted in the correct position on the side of the sheet mountain. Therefore, in the present invention, the wedge 1 is moved up and down before proceeding from the step shown in FIG.

FIG. 2 shows the top surface of the wedge 1 in one embodiment of the present invention. In the figure, the right end is the tip of the wedge. The oblong recesses 4 and 5 are openings for the photoelectric detection means. Third
The figure shows the E--E cross section of FIG. An optical fiber 6 is passed through a hole that passes through the inside of the wedge 1 from the left end of the recess 4 in the figure. On the left end side of the optical fiber 6, L is a light source, and the light is transmitted to the lens l.
The light is focused into the optical fiber 6 and enters the optical fiber 6. A mirror 7 is fitted into the recess 4, facing the right end of the optical fiber 6 and tilted upward at 45 degrees. The light emitted from the right end of the optical fiber 6 is reflected upward by the mirror 7, but if there is nothing above, it will not be reflected back. When the wedge 1 moves horizontally (up and down in FIG. 2) and the interleaving paper P is positioned above the recess 4, the light emitted from the optical fiber 6 reflected by the mirror 7 is reflected by this interleaving paper and returns. The light enters the right end of the optical fiber 6 again. This light is optical fiber 6
The light is emitted from the left end, is reflected upward by the mirror 8, enters the light receiving element 9, and is detected. The mirror 8 has a transparent center so that the light from the light source L can enter the left end of the optical fiber 6. When the light receiving element 9 detects the light, it is detected that there is a slip sheet above the recess 4. Since there are two pairs of the same configuration on the left and right sides of the upper surface of the wedge 1, when the interleaving paper is simultaneously detected by both of them, it can be seen that the wedge 1 is located directly below the interleaving paper. FIG. 4 is a Ro-Ro cross section of FIG. 2. 10 is an optical fiber whose left end structure is the same as that shown in FIG. Since there is no mirror on the right end side of the optical fiber 10, the emitted light illuminates the side surface of the sheet pile S. When the position of the wedge 1 is low and the interleaving paper P is at the position indicated by the solid line in the figure, the reflected light from the side surface of the sheet pile S enters from the right end of the optical fiber 10;
Since the distance from the side surface of the optical fiber 10 is relatively large, the amount of light that re-enters the right end of the optical fiber 10 is small. When the height of wedge 1 is in the correct position, insert paper P
covers the recess 5 as shown by the chain line in the figure, and at this time, most of the light emitted from the right end of the optical fiber 10 is reflected by the paper and re-enters the optical fiber 10, and since the reflection position is very close, the amount of re-incident light is small. is the maximum. Therefore, when the amount of re-incident light, that is, the detection output of the left end emitted light of the optical fiber 10 exceeds an appropriately set level, the wedge 1
The height position can be regulated.

In the present invention, the means for detecting interleaving paper is arbitrary. For example, a light receiving element is fitted into the upper surface of the wedge 1 facing upward, a downward light source is provided above the wedge 1 and moves vertically and horizontally together with the wedge 1, and an interleaving paper is inserted between the light source and the light receiving element. Alternatively, a small hole connected to a vacuum pump may be provided on the upper surface of the wedge, and the interleaving paper may be connected to the small hole when the paper covers the small hole along the wedge surface. It is possible to use a method such as detecting that the height position of the wedge is appropriate based on a decrease in the pressure inside the suction pipe.

Effects The sheet bundle feeding device of the present invention has the above-described configuration, in which a wedge is inserted under the interleaving paper to separate a predetermined number of sheet bundles from the stack of sheets, and the sheet bundle is pushed by a pusher. Since a paper detection means is provided to guide the wedge accurately to the bottom of the interleaving paper, the wedge is always inserted along the back side of the interleaving paper and into the side of the stack of sheets.
Even if the position of inserting the interleaf paper varies, the sheet bundle is always separated accurately without losing sight of the interleaf paper.

[Brief explanation of the drawing]

FIG. 1 shows an outline of an embodiment of the device of the present invention.
The states of each stage of operation are shown in the order of a, b, c, d, and e. FIG. 2 is a top view of the wedge in the same embodiment, FIG. 3 is a sectional view taken along E--E in FIG. 2, and FIG. 4 is a sectional view taken along I--E in FIG. 1... Wedge, 2... Guide bar, 3... Pusher, S... Sheet pile, P... Interleaf paper, 4, 5... Dent, 6, 10... Optical fiber, 7...
Mirror, L... light source, 8... mirror, 9... light receiving element.

Claims (1)

[Scope of claim for utility model registration] The side surface of the stacked sheets along the lower surface of the marker paper P that is inserted between the stacked sheets S at predetermined intervals and peeks out from the side of the stacked sheets. Insert the wedge 1 between the upper and lower sheets in which the interleaf paper has been inserted, and insert the fingers of the pusher 3 under the bundle of a predetermined number of sheets, one end of which has been lifted by the wedge, to remove the same sheet. The bundle is sent to the next process, and a detecting means is provided on the upper surface of the wedge to detect that the interleaving paper covers the upper surface of the wedge, and the wedge is caused to move vertically and horizontally along the side surface of the sheet. A sheet bundle feeding device configured to insert a wedge into a side surface of the stacked sheets at a wedge position where it is detected by the detection means that the interleaving sheet covers the upper surface of the wedge.