JPH0286547A - Accumulating device for sheet material - Google Patents

Abstract

PURPOSE:To enable the accumulation of sheet materials at a high speed by providing an air flow generating means for generating an air flow pushing down the rear end upper surface of the sheet material supplied to an accumulated position. CONSTITUTION:An air flow B is generated in the reversed direction to the feed direction of sheet materials 2 by an air flow generating means (fan) 5. The rear end part of the sheet material 2 leaving a sheet supplying means (conveyor belt) 1 is rapidly pushed downward by the air flow B. At a result, the following sheet material 2 never run against the preceding sheet material 2, even if it is immediately supplied, and the sheet materials 2 are accumulated within a sheet holding means 4 at a high speed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a sheet-like material accumulating device for accumulating sheet-like objects at a predetermined accumulation position, and more particularly, to a sheet-like material accumulating device for accumulating sheet-like objects at high speed. The present invention relates to a sheet-like material accumulation device that can be used for collecting sheet-like materials.

(Prior art) For example, in the manufacturing process of sheet-like products such as paper and film base sheets, the sheet-like products supplied from a sheet supply means such as a belt conveyor are used for subsequent steps such as taking out and packaging. 2. Description of the Related Art Sheet stacking devices that stack and stack a plurality of sheets in a sheet holding means are widely used in practice.

The accumulation of sheet-like materials in the above device is generally carried out in the fourth
As shown in the figure, sheet-like materials 2 are fed one by one by a belt conveyor 1 toward a collection position set inside a sheet holding means 14 such as a casing, and toward the collection position,
The sheet-like material 2 leaving the belt conveyor 1 is allowed to fall naturally while the stacking position is aligned by the sheet holding means 4.

(Problem to be Solved by the Invention) However, in the above device, when trying to feed a subsequent sheet immediately after the preceding sheet has left the belt conveyor, the rear end of the preceding sheet is Since the sheet does not fall down sufficiently, this rear end may collide with the leading edge of the following sheet-like object, resulting in poor stacking.

For this reason, the sheet-like materials must be fed one by one at sufficient intervals, resulting in a problem that the sheet-like materials cannot be stacked at high speed. In addition, the applicant:
For the purpose of smoothly feeding sheet-like materials while preventing them from flying up, we previously proposed a device that stacks sheet-like materials while blowing an air flow onto them (Japanese Patent Application Laid-Open No. 1982-1999). No. 121175). As shown in FIG. 5, this device blows an air flow C onto the lower surface of the sheet-like material to be supplied at the entrance of the sheet-like material 2 supplying position, thereby removing the sheet-like material that has already been accumulated. At the front end of the collection position, a blower 6 generates an air flow from above to press the top surface of the supplied sheet-like material from above, causing the sheet-like material to fly up. It is designed to prevent this from happening. However, even in such a device, the rear end of the supplied sheet does not fall quickly, making it difficult to speed up the accumulation process, and the two types of air currents bend the sheet and cause the sheet to fold. This also causes inconveniences such as the occurrence of problems such as the following.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a sheet-like object stacking device that can stack sheet-like objects at high speed.

(Means for Solving the Problems) As described above, the sheet-like object accumulation position of the present invention includes a sheet holding means that can stack a plurality of sheet-like objects in the vertical direction and hold them at a predetermined accumulation position, and a In a sheet-like material accumulating device comprising: a sheet feeding means for feeding the sheet-like material in a substantially horizontal direction from near the position toward the above-mentioned stacking position, and causing the sheet-like material to fall and accumulate at the stacking position. , at the front end in the supply direction of the sheet-like material at the accumulation position,
The method further includes an air flow generating means that generates an air flow in a direction opposite to the supply direction and pushes down the upper surface of the rear end portion of the sheet material that is dropped and accumulated toward the accumulation position by the sheet supply means. This is a characteristic feature.

(Function) When the air flow as described above is generated by the air flow generating means, the rear end of the sheet material that has left the sheet supply means is quickly pushed downward by this air flow, so that the following sheet Even if the sheet-like material is fed immediately, it will not collide with the preceding sheet-like material.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of a sheet-like material accumulation device according to an embodiment of the present invention, and FIG. 2 is a side sectional view thereof.

The illustrated apparatus includes a sheet holding means 4 in the form of a case, for example, and a sheet holding means 4, the inside of which is a collection position A.
A pair of conveyor belts 1 are provided for feeding sheet-like materials 2 from a substantially horizontal direction.

The sheet-like material 2 is conveyed in a substantially horizontal direction while being held by the conveyor belt 1, and as it advances above the accumulation position A, its front end 2a hits the inner wall surface 4a of the sheet holding means 4,
The front end position is defined by the inner wall surface 4a and falls downward. Further, at this time, the lateral position of the sheet-like objects 2 is also defined by the inner surface 4b of the sheet holding means 4, so that a large number of sheet-like objects 2 are stacked in the stacking position A with their positions aligned.

At the front end side of the sheet holding means 4 in the feeding direction of the sheet-like material, air is supplied in a direction substantially opposite to the feeding direction of the sheet-like material, facing the front end of the conveyor belt 1 (the part where the sheet-like material is separated). A fan 5 for generating a flow B is provided. This fan 5 is arranged at a position such that the airflow B hits the upper surface of the rear end of the sheet-like object that has left the conveyor belt 1, and by blowing such an airflow B,
The rear end of the sheet material 2 leaving the conveyor belt 1 is immediately pushed downward. Therefore, even if the next sheet-like object is sent out by the conveyor belt 1 immediately after the preceding sheet-like object leaves the conveyor belt 1, the rear end of the preceding sheet-like object and the leading end of the following sheet-like object will come into contact. This eliminates the need for sheet materials to be continuously fed out and accumulated at high speed. Note that if the conveyor belt 1 is slightly inclined as in this embodiment and the sheet-like material 2 is fed from slightly obliquely above, the air flow B can hit the top surface of the rear end of the sheet-like material at a slight angle. Therefore, the effect of pushing down the rear end of the sheet-like article can be enhanced, which is preferable.

When plastic sheets with a thickness of 180 μm, a length of 300 mm, and a width of 250 mm were stacked at 250 sheets/tsin without using the above-mentioned fan, a stacking failure occurred at a rate of about 1 in 200 sheets. On the other hand, in accordance with the present invention, when the air flow was generated by a fan as described above, even if the supply speed was increased by 25%, no stacking defects occurred.

In the above embodiment, the airflow is blown only onto the central portion of the sheet-like material to be supplied, but the airflow may be blown over the entire width of the sheet-like material. For example, as shown in FIG. 3, a wide nozzle 7 extending in the width direction of the sheet-like material 2 is provided at the front end of the accumulation position, and airflow is blown from this nozzle over the entire width of the sheet-like material 2. It's okay. Furthermore, the apparatus of the present invention may be a so-called one-slit line apparatus in which sheet-like objects sent along one conveyance line are accumulated at one accumulation position as in the above-mentioned embodiment, or may be a so-called one-slit-line apparatus in which sheet-like articles sent along one conveyance line are accumulated at one accumulation position, or It may be a multi-slit line device in which the sheet-like objects sent along the line are accumulated at separate accumulation positions.

(Effects of the Invention) As explained above, according to the sheet-like material accumulation device of the present invention, an air flow generation means is provided for generating an air flow that pushes down the upper surface of the rear end of the sheet-like material supplied to the accumulation position. As a result, even if the sheet-like materials are continuously fed, the sheet-like materials do not collide with each other, and it becomes possible to accumulate the sheet-like materials at high speed.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a sheet-like material accumulating device according to an embodiment of the present invention, FIG. 2 is a side sectional view of the device, and FIG. 3 is a sectional view of a stacking device according to another embodiment of the present invention. 4 and 5 are schematic diagrams of conventional integration devices. 1... Belt conveyor 2... Sheet-like material 4
... Seat holding means 5 ... Fan 7.
... Wide nozzle A ... Accumulation position B ... Empty
Air flow diagram 1

Claims (1)

[Claims] a sheet holding means capable of vertically stacking a plurality of sheet-like objects and holding them at a predetermined stacking position; In a sheet-like material accumulating device comprising a sheet supply means for dropping and accumulating the sheet-like material at a stacking position, air is supplied to a front end of the sheet-like material at the stacking position in a direction opposite to the supplying direction. Accumulation of sheet-like objects, characterized in that it is equipped with an air flow generating means that generates a flow and pushes down the upper surface of the rear end of the sheet-like objects that are dropped and accumulated toward the accumulation position by the sheet supply means. Device.