JPH0617182B2 - Sheet feeding device - Google Patents

Description

TECHNICAL FIELD The present invention relates to an apparatus for sequentially feeding a sheet-like material to a predetermined position. The sheet-like material here means a signature, which is a constituent element of a book, a developed sheet-like box, and other paper or a thin plate that can be handled as a single unit.

(Prior Art) For example, in bookbinding, the signatures are stacked in a series of corresponding pockets, and the signatures are taken out one by one from the lower end of each pocket to collect and bind one book. . Therefore, it is necessary to store an appropriate amount of signatures in each pocket in an unfolded state, and therefore, one by one in the feeding process. In addition,
Unraveling one by one in the feeding process is also desirable in feeding other sheet materials.

Conventionally, as such a sheet-like material supplying apparatus, those shown in FIGS. 6 and 7 are known. As shown in the figure, the feeding device shown in FIG. 6 is a feeding conveyor on which a large number of sheet-like materials (A) to be fed are placed in an upright state.
(1), a first endless belt (3) consisting of a belt with holes that obliquely rises near the tip of the infeed conveyor and extends to a predetermined position (2), and the tip of the infeed conveyor (1) A vacuum suction device (4) that is near the top and that sucks the sheet-like material through the endless belt (3), and a first suction belt (3) that is above the first endless belt and that sandwiches and conveys the sheet-shaped material. 2 endless belts (5)
Composed of. During operation, the most advanced sheet material on the infeed conveyor (1) is sequentially adsorbed to the surface of the belt (3) by the adsorption device (4) and lifted by friction with the belt surface, and to some extent. By the way, the first and second endless belts (3). (5) It is sandwiched between the sheets and conveyed as it is to a predetermined position such as a pocket.

Further, in the conventional apparatus of FIG. 7, the suction roller (4) by vacuum is not used, and the lowest roller (3 ′) for hanging the first endless belt (3) is placed on the tip of the feeding conveyor (1). Place it close,
As a result, the sheet-like material (A) is lifted to some extent by the friction with the first endless belt (3) in the roller (3 ') and its vicinity, and then is sandwiched between the pair of endless belts and conveyed. .

(Problems to be Solved by the Invention) In such a conventional device, if the pressure pressed by the subsequent sheet-like material is appropriate, the first endless belt is used.
By (3), you can lift one by one, but if the pressing force is strong, you can lift multiple sheets at the same time and pinch between a pair of endless belts, so you can not completely loosen in the process. was there.

An object of the present invention is to eliminate the above-mentioned problems of the prior art, and therefore, to supply the sheet-like materials one by one to a predetermined position, and thus to completely unravel the sheet-like material during the feeding process. It is to provide a device.

(Means for Solving the Problems) A feature of the sheet-like material supplying apparatus according to the present invention is that one is provided with a hole between a feeding conveyor on which a large number of sheet-like objects are placed and a predetermined position where the sheet-like objects are to be supplied. A lifting device that includes a pair of endless belts and a vacuum suction device consisting of attached belts, and further lifts to a certain extent by friction in contact with the surface of the most advanced sheet material on the feeding conveyor and delivers it to the endless belt,
A device for holding a sheet-like object on the top of the lifting device is included.

(Operation of the means) The sheet material on the infeed conveyor is lifted to the top of the sheet by the lifting device, and in the process, a plurality of sheet materials may be pushed depending on the pressure with which the sheet material is pushed by the succeeding sheet material. It can be lifted at the same time. A holding device holds one or a plurality of sheet-like objects on the top of the lifting device. The first endless belt, which is a perforated belt, is pressed by the holding device with a suitable pressure to press the sheet-like materials one by one by vacuum, and they are adsorbed one by one between the belts and sent to a predetermined position.

(Example) Next, an example of the present invention will be described with reference to the drawings. 1 to 3 show the whole of the feeding device, and as shown in the drawing, the feeding conveyor (1) and a predetermined position (2) such as a pocket for a signature are also provided in this device. A pair of endless belts (3) between them. (5) are arranged so that they are in contact with each other in a vertical relationship, one endless belt (3) is a belt with holes, and at a position along it, slightly above the lifting device described below by a vacuum suction device ( 4) is provided.

The endless belt (3) is wound around a series of rollers (3a), (3b) ... And is driven by a motor (6). The other belt (5) is on the upper side of the belt (3) and is wound around a series of rollers (5a), (5b) .... (7) is the roller (3a) close to the specified position.
It is the handle for position adjustment of a). In the figure, (8) is a guide plate, which is hung on both sides of a pair of endless belts. The infeed conveyor (1) consists of a pair of belts (1a) or chains that move gradually with the sheet (A) placed on it, the side guide plate (1b) and the drive motor (1c). Become.

The feeding device according to the invention comprises a lifting device (10) arranged at the position of the leading edge of the input conveyor (1) in contact with it, and in connection with that lifting device, preferably as illustrated. In addition, a holding device composed of a leaf spring (11) is provided. More preferably, it includes an air nozzle (12) for separating the sheet-like material on the top of the lifting device (10). The air nozzle (12) is an endless belt (3) arranged in the center as clearly shown in FIG. It is provided on both sides of (5). Further, the leaf springs (11) of the holding device are preferably symmetrically paired, and the supporting rods (13) are respectively used.
It is fixed to.

The lifting device (10) is a small loop endless belt as shown.
(10a) is preferable, and such an endless belt has the advantage that the contact surface with the sheet-like material is large and the sheet-like material can be lifted in a stable operation. As shown in FIG. 1, the lifting device (10) is a motor.
Driven by (14).

At the time of operation, the sheet-like objects (A) placed upright on the infeed conveyor (1) are sequentially lifted by the lifting device (1
(0) is brought into contact with the belt surface, and by friction with it, to a certain extent, for example, the length of one side of the sheet-like object or the height less than that is raised, and as shown in FIG. 1, the lifting device (10) Lifted on top. The sheet material on the top of the lifting device (10) is held by the holding device (11), and the first endless belt
It is pressed against the surface of (3) with appropriate pressure. The sheet-like material on the top of the lifting device (10) is preferably separated by blowing air with an air nozzle (12) or by a vibration load through a holding device (11). Since the sheet-like material on the top of the lifting device (10) is pressed against the surface of the first endless belt (3) by the holding device (11) with an appropriate pressure, the belt (3 (3) is adsorbed on one surface, and when it is raised to a certain extent, it is held between the upper endless belt (5) and reaches the predetermined position (2).

In the above embodiment, the lifting device (10) is composed of the endless belt (10a), but other structures may be used, for example, as shown in FIG. 5, a pair of friction rollers (10b). ). Also in this case, the most advanced sheet-like material is sequentially lifted up to a certain degree, and the first roller from the top
Adsorbed on the endless belt (3). Further, the holding device (11) does not necessarily have to be a leaf spring, but instead, a support rod
It may be a rod that is provided so as to be tiltable in the vertical direction at the lower end with respect to (13). Furthermore, air may be blown onto the back surface of the sheet-shaped material.

(Effects of the Invention) As described above, according to the present invention, since the sheet-like objects that are lifted to a certain degree and pressed by the belt surface with an appropriate pressure are adsorbed, the sheet-like objects can be adsorbed one by one. Also, it is clamped between the belts and conveyed. Therefore, it can be completely loosened in the process of being conveyed to a predetermined position.

[Brief description of drawings]

FIG. 1 is a front view of a feeder according to an example of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is an end view thereof, FIG. 4 is a perspective view of essential parts, and FIG. 6 is a schematic view showing an example of a conventional device, and FIG. 7 is a schematic view showing another conventional device. In the figure, 1 ... infeed conveyor, 3,5 ... endless belt, 4
... Vacuum adsorption device, 10 ... Lift device, 11 ... Holding device, 12 ... Air nozzle

Claims (5)

[Claims] 1. A feeding conveyor on which a large number of sheets are placed, a first endless belt comprising a belt with holes extending from a position above the leading end of the feeding conveyor to a predetermined position, and the first endless belt. And a vacuum suction device for sucking a sheet-like material through the sheet feeding device, and a second endless belt that is on the first endless belt and sandwiches and conveys the sheet-like material between them. A lifting device that lifts the most advanced sheet material of the infeed conveyor to some extent by friction and transfers it to the first endless belt, and the sheet material on the top of the lifting device is the first endless belt. A sheet-like material feeding device including a device for holding the sheet-shaped object so as not to be separated from the feeding device. 2. The sheet material feeder according to claim 1, wherein the lifting device is an endless belt. 3. The sheet-like material feeding device according to claim 1, wherein the holding device is a leaf spring. 4. The sheet-like material feeding device according to claim 1, wherein the holding device comprises a rod provided at a lower end thereof so as to be tilted in a vertically rotatable manner. 5. The sheet material feeder according to claim 1, further comprising an air nozzle for separating the sheet material on the top of the lifting device.